Patent application number | Description | Published |
20080247364 | CYCLIC DELAY DIVERSITY AND PRECODING FOR WIRELESS COMMUNICATION - Techniques for sending a MIMO transmission using a combination of cyclic delay diversity and precoding are described. A set of delays (e.g., zero delay, small delay, and large delay) for cyclic delay diversity and a set of precoding matrices may be supported. In one design, a Node B may select a delay specifically for a UE or for a set of UEs served by the Node B. In another design, a UE may evaluate different combinations of precoding matrix and delay, determine the combination with the best performance, and send this combination of precoding matrix and delay to the Node B. The Node B may perform precoding with the precoding matrix and then processing for cyclic delay diversity based on the selected delay. Alternatively, the Node B may perform processing for cyclic delay diversity based on the selected delay and then precoding with the precoding matrix. | 10-09-2008 |
20080261645 | INTERFERENCE AND POWER CONTROL FOR WIRELESS COMMUNICATION - Techniques for performing interference and power control in a wireless communication system are described. An asymmetric power control scheme adjusts the transmit power of a user equipment (UE) in an asymmetric manner, e.g., with different up and down step sizes. In one design, a parameter value may be determined based on received SINR of at least one Node B. Up and down steps may be determined based on the parameter value and may have different sizes. At least one overloading indicator from at least one neighbor Node B may be obtained. The transmit power of the UE may be adjusted based on the up and down steps and the at least one overloading indicator. For example, the transmit power may be increased by the up step if an overloading indicator from the strongest neighbor Node B is not received and may be decreased by the down step otherwise. | 10-23-2008 |
20080273513 | METHOD AND APPARATUS FOR UL ACK ALLOCATION - Systems and methodologies are described that facilitate allocation of uplink acknowledgement (ACK) resources for a wireless communication system. Various aspects described herein facilitate explicit creation and transmission of a bundled assignment of downlink communication resources and uplink resources for ACK transmission, thereby facilitating overhead-efficient ACK allocation for users that can communicate pursuant to a persistent resource assignment without requiring scheduling information from an associated control channel. Additionally, indexing schemes for uplink ACK resources are provided herein to facilitate ACK allocation for systems in which both scheduled and persistent users can communicate at a common transmission time interval (TTI). | 11-06-2008 |
20080279131 | UPLINK TIMING CONTROL - Systems and methodologies are described that facilitate evaluating and utilizing timing updates in a wireless communications network. A base station can transmit timing adjustment commands to mobile devices as needed as opposed to a periodic timing update where timing adjustment commands are always sent within a certain period. However, the mobile devices need to stay awake to monitor the timing adjustment message resulting in high power consumption. On the other hand with periodic update, the mobile devices can wake up to check whether there is a timing adjustment for itself and, if not, return to a sleep mode. With the proposed method, a mobile device can sleep for a period of time to check for timing adjustment commands upon waking. Thus, both the mobile power consumption and downlink signaling overhead are reduced. | 11-13-2008 |
20080287075 | TRANSPOSED STRUCTURE FOR CYCLIC DELAY DIVERSITY (CDD) BASED PRECODING - Systems and methodologies are described that facilitate applying cyclic delay diversity (CDD) and precoding to wireless transmissions. In particular, data vectors to be transmitted to a number of receive antennas of a receiver can be transformed to a virtual antenna domain. CDD can be applied to this domain followed by precoding to allow the benefits of precoding to remain though CDD is applied. In this regard, the resulting signals can be transmitted without pouring transmission energy into null spaces unreachable by receiving devices. | 11-20-2008 |
20090022235 | CONTROL CHANNEL FORMAT INDICATOR FREQUENCY MAPPING - Systems and methodologies are described that facilitate selecting frequency for transmitting control channel format indicator (CCFI) data such to identify a related cell. In one example, the CCFI data can be transmitted in an initial portion of frequency (such as an orthogonal frequency division multiplexing (OFDM) symbol) in a time transmit interval (TTI). The CCFI data can be spread across the initial portion of frequency and be shifted to identify the transmitting cell. Additionally, the CCFI data can be scrambled to further identify the cell. The CCFI data can also be utilized to determine structure of subsequent control and/or data channels. | 01-22-2009 |
20090067378 | BLIND DECODING IN A MOBILE ENVIRONMENT - Providing for modified rate-matching of modulated data to convey mobile network system information is described herein. By way of example, a rate-matching state, such as a data offset, can be introduced into a coded data stream that is modulated to resources of a wireless signal. The state can further be correlated to a state of the network system, such as transmit antenna configuration. Terminals receiving the wireless signal can analyze the signal to identify the rate-matching state and obtain the correlated network system state. Components of the terminal can then be configured according to the particular network system state, resulting in improving access point detection, and in some cases improved channel throughput and reliability. | 03-12-2009 |
20090086700 | SYSTEMS AND METHODS FOR COMMUNICATING CONTROL DATA USING MULTIPLE SLOT FORMATS - Systems and methods for communicating control information in slots that use at least two different slot formats. In one embodiment, a method implemented in a wireless communication system includes providing at least two different slot formats, formatting control data in the slots of a control frame according to the at least two different slot formats, transmitting the control frame from a mobile station to a base station via a control channel, receiving the control frame, extracting data rate information from the control frame according to the at least two different slot formats, decoding the extracted control data, parsing the extracted data into separate data rate information and decoding data received via one or more data channels using the decoded control data. In one embodiment, the method is used to enable additional TFCI data corresponding to two different data channels to be transmitted on a single control channel. | 04-02-2009 |
20090181692 | RESOURCE ALLOCATION RANDOMIZATION - Different sequence resources can be allocated to a mobile device where the mobile device can exclusively uses the sequence resource with regard to a base station during a communication session. However, if another mobile device using another base station is assigned a matching sequence resource, then there can be interference if the mobile devices are relatively close enough together. Therefore, randomization of the sequence resources can take place—moreover, a cyclic shift result can be employed in sequence resource allocation to attempt to minimize interference. | 07-16-2009 |
20090196247 | SIMULTANEOUS TRANSMISSION OF ACKNOWLEDGEMENT, CHANNEL QUALITY INDICATOR AND SCHEDULING REQUEST - Systems and methodologies are described that facilitate simultaneous transmission of control information in a single sub-frame. For instance, simultaneous transmission can maintain single carrier waveforms for a control channel even when a plurality of information types is scheduled in concurrently. Channel quality indicators, scheduling requests and acknowledgement messages can be jointly coded. In addition, reference symbols in a sub-frame can be modulated to indicate values associated with a scheduling request or an acknowledgement message. Moreover, in situations where channel quality indicators, scheduling requests and or acknowledgement messages are simultaneously scheduled, one or more can be dropped. Further, a single carrier constraint can be relaxed to enable simultaneous transmission of information in the sub-frame at different frequencies. | 08-06-2009 |
20090197546 | MIMO TRANSMISSION WITH EXPLICIT AND IMPLICIT CYCLIC DELAYS - Techniques for transmitting data using a combination of explicit cyclic delay and implicit cyclic delay are described. A transmitter may perform first processing for cyclic delay diversity (or explicit cyclic delay processing) based on a first set of cyclic delay values known to a receiver. The transmitter may perform precoding based on a precoding matrix either before or after the explicit cyclic delay processing. The transmitter may perform second processing for cyclic delay diversity (or implicit cyclic delay processing) based on a second set of cyclic delay values unknown to the receiver. The transmitter may perform both explicit and implicit cyclic delay processing for data and may perform only implicit cyclic delay processing for pilot. One entity may select the first set of cyclic delay values and inform the other entity. The transmitter may autonomously select the second set of cyclic delay values without informing the receiver. | 08-06-2009 |
20090201794 | MULTIPLEXING DEVICES OVER SHARED RESOURCES - Systems and methodologies are described that facilitate transmitting and receiving signals over I and Q branches of a communication channel to mitigate potential I/Q imbalance. In particular, a device can transmit a signal over the I and Q branches to distribute transmission power substantially evenly for a given channel. The device can demodulate the data with a code or matrix having real and complex modifiers resulting in an I and Q branch signal for transmission. Where the channel has multiple resources, the device can alternate or transmit over the I branch in one resource and the Q branch in another resource for a given signal to distribute power. Also, the device can apply a complex scrambling code to distribute a signal over both the I and Q branches. The device can also use QPSK or higher order modulation to send the signals meant for the same user. | 08-13-2009 |
20090238131 | METHOD AND APPARATUS FOR RESOURCE MANAGEMENT IN A WIRELESS COMMUNICATION SYSTEM - Systems and methodologies are described that facilitate improved resource management in a wireless communication system. As described herein, supergroups can be formed from groups of Physical Hybrid Automatic Repeat Request Channels (PHICHs) such that respective PHICH supergroups are multiplexed onto respective non-overlapping resource element subsets, thereby improving resource usage efficiency for the extended cyclic prefix case and limited numbers of transmit antennas. In one example described herein, even-indexed PHICH groups are mapped to a selected subset of resource elements in a group while odd-indexed PHICH groups are mapped to the remaining resource elements in the group. This mapping can be performed by modifying orthogonal sequences associated with the PHICH groups and/or by performing resource mapping in different manners for respective PHICH supergroups. Upon receiving a transmission of mapped PHICH information, a receiving entity can leverage knowledge of the mapping to decode transmitted PHICH information using the proper resource subset(s). | 09-24-2009 |
20090247166 | MEASURING NEIGHBORING CELL LOADING IN WIRELESS COMMUNICATIONS - Systems and methodologies are described that facilitate detecting cell interference and/or loading by analyzing control data transmitted between devices communicating in the cell. Control data resources can be transmitted related to communication received over data channels, and the control data resources can comprise quality indicators related to the data as well as resource identifiers that specify a resource over the data channel related to the data. Multiple control data resources can be transmitted per communication specifying a beginning and ending resource identifier of related data channel resources. If this control data is decodable at a wireless device, the associated resources corresponding to the resource identifiers can be marked as interfered and/or avoided in subsequent communication or resource allocation requests by the wireless device. | 10-01-2009 |
20090247174 | UPLINK ACK/NAK RESOURCE ALLOCATION - Systems and methodologies are described that facilitate allocating uplink resources to mobile devices to employ to signal acknowledgment indicators. Persistently scheduled mobile devices can be explicitly assigned uplink resources. Dynamically scheduled mobile device can utilize a one-to-one mapping to identify uplink resources based upon a downlink control channel index. The one-to-one mapping can be revised to remove associations between downlink control channel indices and resources allocated to persistently scheduled users and/or reserved for other control signaling in a mixed resource block. In addition, downlink control channel indices can be selected to avoid collisions between dynamic and persistent users. | 10-01-2009 |
20090257390 | SYSTEM AND METHOD TO ENABLE UPLINK CONTROL FOR RESTRICTED ASSOCIATION NETWORKS - Systems and methodologies are described that facilitate resource management in a wireless communication system. Various techniques described herein can enable a network cell in a wireless communication system (e.g. a macro cell) to mitigate the effects of interference on other surrounding network cells (e.g., femto cells embedded within the coverage of the macro cell). For example, a network cell can allocate control resources that overlap control resources of a nearby cell and assign resources within the region of overlap only to users that will not cause substantial interference to the nearby cell. As another example, a network cell can utilize a control channelization that partially coincides with a control and/or random access channelization of a nearby cell. The network cell can subsequently elect not to use the control resources in the coinciding region in order to enable the nearby cell to control the effects of interference though data scheduling. | 10-15-2009 |
20090268685 | ASSIGNMENT OF ACK RESOURCE IN A WIRELESS COMMUNICATION SYSTEM - Techniques for assigning acknowledgement (ACK) resource to a user equipment (UE) in a wireless communication system are described. In one design, a first parameter indicative of radio resources (e.g., the lowest index of at least one physical resource block) allocated to the UE for data transmission may be obtained. A second parameter indicative of another resource (e.g., a cyclic shift of a reference signal sequence) assigned to the UE for data transmission may also be obtained. The first and/or second parameter may be restricted, and each restricted parameter may be limited to a set of allowed values among all available values for the parameter. ACK resource assigned to the UE for data transmission may be determined based on the first and second parameters. In one design, sequential first parameter values may be mapped to sequential ACK resources indices. In another design, mirror mapping with different mapping directions may be used for different allowed values of the second parameter. | 10-29-2009 |
20090274109 | METHOD AND APPARATUS FOR UPLINK ACK/NACK RESOURCE ALLOCATION - A method is provided to allocate resources for wireless communications. The method includes grouping downlink control channels from multiple subframes and ordering the downlink control channels across downlink subframes having a first control channel element located in a first symbol map and associated with reserved resources for an uplink channel. The method employs a symbol first mapping or a mixed-symbol/subframe first mapping to efficiently allocate the resources. | 11-05-2009 |
20090279500 | METHODS OF SENDING CONTROL INFORMATION FOR USERS SHARING THE SAME RESOURCE - Certain aspects of the present disclosure relate to a method for sending control information to multiple user terminals that share the same resources in a Spatial Division Multiple Access (SDMA) wireless system. The control information can be transmitted from an access point over a physical downlink control channel (PDCCH) that is common for a plurality of user terminals. The overall PDCCH overhead can thus be reduced due to a smaller number of required PDCCH in the SDMA wireless system. | 11-12-2009 |
20090316675 | UPLINK PILOT MULTIPLEXING IN SINGLE USER MIMO AND SDMA FOR SINGLE CARRIER FREQUENCY DIVISION MULTIPLE ACCESS SYSTEMS - Systems and methodologies are described that facilitate adaptive uplink pilot multiplexing schemes. In various embodiments, frequency position and pilot channel bandwidth can be adaptively varied in a block over time based on the uplink channel data, such as the number of streams to be multiplexed. Thus, the provided adaptive uplink pilot multiplexing schemes provide flexible uplink pilot allocation schemes while maintaining single carrier waveform for improved transmit power efficiency and orthogonality of pilots within blocks for improve channel estimation and suppression of interference. | 12-24-2009 |
20100027450 | Multiplexing of control and data with varying power offsets in a SC-FDMA system - Systems and methodologies are described that facilitate multiplexing of control information and data for common transmission in a localized FDM wireless communication system. Localized FDM transmission of control and data channels can be achieved by, for example, multiplexing control information with data and transmitting the control information and data using resources and transmission schemes specified for transmission of the data. To ensure the reliability of control information multiplexed with data, a power offset can be applied to the control information to provide varying protection levels for the control information based on properties of the data resources into which it is embedded in order to maintain a predetermined signal quality for the control information independent of the data resources. | 02-04-2010 |
20100027502 | Sub-band dependent resource management - A system and method for facilitating resource management in OFDM systems is provided. The system permits different and flexible resource cell metric operations levels (e.g. uplink load management, admission control, congestion control, signal handoff control) for different sub-bands. For the uplink load management, there are multiple distinct load operation points (e.g. IoT, RoT) per sub-band group instead of the same operation level across the entire available band. The sub-band groups encompass the entire band. The facilitation system also comprises a variety of transmitting protocols, command increment variable stepsize methods and robust command response methods. The system thus provides more flexible reverse link resource management and more efficient utilization of the bandwidth. | 02-04-2010 |
20100029212 | Inter-cell power control for interference management - A system and method for inter-cell power control for interference management in an OFDM system is provided. The system provides for a combination use of open loop and closed loop PSD control algorithms. The open loop control is a function of path loss from the serving cell as well as the neighboring cells. The closed loop control updates the end node transmit PSD by listening to the load indicators from the serving cell and at least one other neighboring non-serving cell which generates the highest level of interference. The system thus provides a fast and tight control with multi-cell information that allows improved inter-cell interference control. | 02-04-2010 |
20100039953 | A-PERIODIC PUCCH TRANSMISSION ON PUSCH - Systems and methodologies are described that facilitate decoding of a sub-frame related to a Physical Uplink Shared Channel (PUSCH) transmission. In particular, a Rank Indicator (RI) can be decoded and identified without error which can result in an error-free decoding and identification of Channel Quality Indicator (CQI), a starting point for a portion of data within the Physical Uplink Shared Channel (PUSCH) transmission, and an acknowledgement (ACK). Additionally, systems and methodologies are described related to packaging information within a sub-frame of a Physical Uplink Shared Channel (PUSCH) transmission such that decoding can be employed without error. | 02-18-2010 |
20100050039 | HANDLING OF DISRUPTED SYNCHRONOUS HYBRID AUTOMATIC REPEAT REQUEST (HARQ) CYCLE AT SYSTEM TIME ROLLOVER - Certain aspects of the present disclosure propose techniques for avoiding a disruption in synchronous hybrid automatic repeat request operation at system time rollover. The techniques define the behavior of a system before and after the system frame number (SFN) rollover point to ensure a known relationship between a hybrid automatic repeat request (HARQ) process identification number and system time. | 02-25-2010 |
20100054203 | MULTIPLEXING OF CONTROL INFORMATION AND DATA FOR WIRELESS COMMUNICATION - Techniques for sending control information in a wireless communication system are described. A user equipment (UE) may be configured to periodically send control information (e.g., CQI information) and may receive an assignment of control resources for sending the control information. The UE may also receive an assignment (e.g., a dynamic assignment or a semi-persistent assignment) of data resources for sending data. The UE may send the control information (i) on the control resources if the control and data resources do not coincide in time or (ii) on a designated portion of the data resources if the control and data resources coincide in time. The UE may generate at least one SC-FDMA symbol with the control information sent on the control resources or the designated portion of the data resources. The UE can maintain a single-carrier waveform for each SC-FDMA symbol. | 03-04-2010 |
20100067443 | WIRELESS COMMUNICATION SYSTEMS WITH FEMTO NODES - Systems and methods for performing a handoff of an access terminal from a macro node to a femto node are disclosed. In one embodiment, the femto node is configured to transmit a predetermined signal for determining signal quality and an identifier that uniquely identifies the femto node to the access terminal. The access terminal is configured to transmit the identifier to the macro node. The femto node is identified as a hand in target based on the transmitted identifier and the macro node is configured to hand in the access terminal to the femto node. | 03-18-2010 |
20100067514 | WIRELESS COMMUNICATION SYSTEMS WITH FEMTO NODES - Systems and methods for performing a handoff of an access terminal from a macro node to a femto node are disclosed. In one embodiment, the femto node is configured to transmit a predetermined signal for determining signal quality and an identifier that uniquely identifies the femto node to the access terminal. The access terminal is configured to transmit the identifier to the macro node. The femto node is identified as a hand in target based on the transmitted identifier and the macro node is configured to hand in the access terminal to the femto node. | 03-18-2010 |
20100074210 | APPARATUS AND METHOD FOR FACILITATING TRANSMIT DIVERSITY FOR COMMUNICATIONS - A method and apparatus facilitating transmit diversity for control information communications is provided. The method may comprise processing received content, generating control information in response to the processed content, allocating two or more resources associated with two or more transmit antennas for transmitting the control information using a transmit diversity scheme, and determining cyclic shifts by applying a predetermined cyclic shift delta parameter. | 03-25-2010 |
20100105406 | Inter-cell power control in the presence of fractional frequency reuse - System(s) and method(s) are provided for inter-cell power control in the presence of fractional frequency reuse in a wireless communication system. Transmission power control of a terminal ( | 04-29-2010 |
20100135225 | PHYSICAL RANDOM ACCESS CHANNEL RESOURCE SELECTION - Systems and methodologies are described that facilitates managing assignment of available random access resources in order to minimize delay and random access load. A number of available random access resources can be defined by a network or a base station, wherein a user equipment can access the number of available random access resources via an information block. The user equipment can be randomly assigned or uniformly assigned to at least one of the number of available random access resources. Additionally, the network can adjust the defined number of available random access resources based upon reported delay, base station load, or historic load data for a base station. | 06-03-2010 |
20100195759 | UPLINK OPEN-LOOP SPATIAL MULTIPLEXING IN WIRELESS COMMUNICATIONS - Systems and methodologies are described that facilitate cycling through precoders for transmitting wireless network communications in a time domain. The precoders can be cycled according to a precoder sequence for each data symbol transmission. When the last precoder is selected the cycle can begin again, a new precoder sequence can be received or defined, and/or the like. A precoder sequence related to a subset of precoders present in a wireless device can be defined sequentially, cyclically shifted according to an identifier or one or more communications parameters, randomly, pseudo-randomly according to an identifier or one or more communications parameters, and/or the like. In addition, the precoder sequence can be utilized to select a precoder for one or more retransmissions. Such cycling of precoders can increase transmit diversity. | 08-05-2010 |
20100202559 | MULTIPLEXING AND CODING SCHEMES FOR MULTIPLE TRANSMIT ANTENNAS IN A WIRELESS COMMUNICATION SYSTEM - Techniques for transmitting data from multiple transmit antennas using space orthogonal resource transmit diversity (SORTD) are described. For the SORTD scheme, a different orthogonal resource may be assigned to each transmit antenna. Data may be sent from the multiple transmit antennas using multiple orthogonal resources. In one design, a UE may process at least one information bit (e.g., with joint or independent coding) to obtain first and second sets of at least one modulation symbol. The UE may process the first set of modulation symbol(s) for transmission from the first transmit antenna using a first orthogonal resource. The UE may process the second set of modulation symbol(s) for transmission from the second transmit antenna using a second orthogonal resource. Each orthogonal resource may include a different reference signal sequence or a different set of reference signal sequence and orthogonal sequence. | 08-12-2010 |
20100202560 | ANTENNA VIRTUALIZATION IN A WIRELESS COMMUNICATION ENVIRONMENT - Systems and methodologies are described that facilitate performing antenna virtualization in a wireless communication environment. A set of physical transmit antennas can be partitioned into a plurality of groups of physical transmit antennas. Further, a precoding vector for a particular group of physical transmit antennas from the plurality of groups of physical transmit antennas can be formulated. Moreover, the particular group of physical transmit antennas can form a particular virtual antenna. By way of another example, a disparate precoding vector for a disparate group of physical transmit antennas from the plurality of groups of physical transmit antennas can be formulated, and the disparate group of physical transmit antennas can form a disparate virtual antenna. The precoding vector can be applied to a signal for transmission over the particular virtual antenna, and the disparate precoding vector can be applied to a disparate signal for transmission over the disparate virtual antenna. | 08-12-2010 |
20100202561 | METHOD AND APPARATUS FOR MODULATION AND LAYER MAPPING IN A WIRELESS COMMUNICATION SYSTEM - Systems and methodologies are described herein that facilitate improved modulation and coding techniques for a multiple-in multiple-out (MIMO) communication system. As described herein, data to be transmitted over a set of physical layers (e.g., corresponding to antennas, beams, etc.) can be processed such that encoding is performed on a per-codeword basis and modulation is performed on a per-layer basis, thereby mitigating performance degradation experienced by traditional systems due to layer imbalance. As further described herein, per-codeword code rate parameters and per-layer modulation parameters can be signaled to a device in various manners, such as through modulation and coding scheme (MCS) signaling, explicit code rate and/or modulation scheme signaling, relative code rate and/or modulation scheme signaling, or the like. | 08-12-2010 |
20100214938 | FLEXIBLE DATA AND CONTROL MULTIPLEXING - Systems and methods are disclosed for control-data multiplexing as well as control-data decoupling. In one embodiment, a semi-static approach is disclosed, wherein the upper layer(s) are configured such that each user equipment uses either control-data multiplexing or control-data decoupling. Additionally or alternatively, a dynamic approach is disclosed, in which one bit is added to the DCI format which indicates whether the UE is using control-data multiplexing or control-data coupling. | 08-26-2010 |
20100215007 | CHANNEL INTERLEAVER FOR TRANSMISSION OF MULTIPLE CODE BLOCKS IN A WIRELESS COMMUNICATION SYSTEM - Techniques for performing channel interleaving to achieve similar SINRs for multiple code blocks are described. In one design, a transmitter station (e.g., a base station or a UE) determines a plurality of resource groups assigned for data transmission. Each resource group includes a plurality of resource elements formed by a cluster of subcarriers in a time interval. The transmitter station partitions a transport block into a plurality of code blocks, processes each code block to obtain data symbols for that code block, and maps the data symbols for each code block to at least one resource element in each of the plurality of resource groups. The transmitter station transmits the mapped data symbols for the plurality of code blocks to a receiver station. In one design, the transmitter station receives an ACK or a NACK for the transport block and retransmits all code blocks if a NACK is received. | 08-26-2010 |
20100232311 | CONCURRENT TRANSMISSION OF ACK/NACK, CQI AND CQI FROM USER EQUIPMENT - A wireless communications method is provided. The method includes providing a multi-codeword transmission that includes ACK/NACK and discontinuous transmission (DTX) information. The method also includes ordering reference signal (RS) symbols in proximity to at least one other reference signal symbol to facilitate signaling of additional states and enabling spreading gain to be increased. | 09-16-2010 |
20100238823 | METHOD AND APPARATUS FOR HANDLING INCONSISTENT CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - Techniques for handling inconsistent control information in a wireless communication system are described. In an aspect, inconsistent control information is handled in different manners for the downlink and uplink. In one design, a user equipment (UE) receives a first grant with first control information for a first data transmission and also receives a second grant with second control information for a second data transmission. The UE determines that the second control information is inconsistent with the first control information, e.g., due to the two grants conveying different transport block sizes. The UE determines whether to retain or discard the second grant based on whether the two grants are for data transmissions on the downlink or uplink. In one design, the UE retains the second grant if the two grants are for data transmissions on the downlink and discards the second grant if the two grants are for data transmissions on the uplink. | 09-23-2010 |
20100322177 | WIRELESS COMMUNICATION HAVING REDUCED FEEDBACK DELAY - Providing for improved error control signaling in wireless communications is disclosed herein. By way of example, multiple transmissions can be conducted for a HARQ process prior to a scheduled feedback signal on the HARQ process, causing a receiving device to combine the multiple transmissions, rather than treat them as separate transmissions. In this manner, multiple transmissions can be employed to increase overall receive energy, without violating maximum transmit power constraints in a wireless communication. Further, these multiple transmissions can be configured based on prevailing signal strength at the receiving device, or based on processing capabilities of the receiving device, providing flexible protocols that can accommodate advanced as well as legacy UEs in wide range of wireless conditions. | 12-23-2010 |
20110013560 | BROADCAST SIGNALING L1 OVERLOAD INDICATION - Devices and methods are provided for implementing an over-the-air (OTA) broadcast of an overload indication to reduce interference levels at neighboring node(s). In one embodiment, the method involves receiving the OTA broadcast of the overload indication from a neighboring node. The method further involves performing transmit power control based upon the received overload indication to reduce Interference over Thermal (IoT) noise at the neighboring node (e.g., by adjusting the transmit power spectral density). Such a method may be performed, for example, by an access terminal or a small base node. | 01-20-2011 |
20110014940 | USER EQUIPMENT AND BASE STATION BEHAVIOR IN RESPONSE TO AN OVERLOAD INDICATOR - Systems and methodologies are described that facilitate responding to overload indicators in a wireless communication environment. A non-serving base station can send an over-the-air (OTA) overload indicator (OI) and a backhaul OI. A UE can receive the OTA OI from the non-serving base station, generate a report based upon the OTA OI, and send the report to a serving base station. The serving base station can receive the report from the UE, and generate a power control command for the UE based at least in part upon the report. Moreover, the serving base station can generate the power control command for the UE further based upon the backhaul OI received from the non-serving base station. For example, the UE can be configured to ignore the OTA OI. By way of another example, the serving base station can cause the non-serving base station to inhibit sending the backhaul OI. | 01-20-2011 |
20110026420 | LAYER SHIFTING FOR UPLINK MIMO - Wireless communications methods and related apparatuses are provided. The methods include analyzing a report or a channel quality indicator in a multiple-in-multiple-out (MIMO) wireless communications system. In one aspect, the methods include determining whether layer shifting should be employed in view of the report or channel quality indicator. The methods also include enabling or disabling layer shifting in an uplink communication based on the report or the channel quality indicator. | 02-03-2011 |
20110026421 | ADAPTIVE TRANSMISSIONS IN COORDINATED MULTIPLE POINT COMMUNICATIONS - Systems and methodologies are described that facilitate adaptively communicating data to wireless devices. An access point can precode a dedicated reference signal (DRS) for transmitting to a wireless device, and the wireless device can receive the precoded DRS. The wireless device can determine the precoder by estimating a channel of the DRS and can provide channel condition feedback to the access point. The access point can create data signals including a single or a burst of data transmissions according to the feedback and can precode the data signals using the same precoder. The wireless device can additionally decode the data signals using the precoder. Moreover, the access point can cycle through precoders according to a patterned, random, pseudo-random, and/or similar sequence. | 02-03-2011 |
20110026473 | DETERMINING CONTROL REGION PARAMETERS FOR MULTIPLE TRANSMISSION POINTS - Systems and methodologies are described that facilitate determining control region parameters related to a plurality of carriers and/or coordinated multiple point (CoMP) access points. Wireless devices can receive control region parameters related to the carriers or CoMP access points from a serving access point over control channel resources. Additionally or alternatively, wireless devices can assume all carriers or CoMP access points have substantially the same control region as indicated in a control format indicator channel from the serving access point or based on a configured value. | 02-03-2011 |
20110026622 | HYBRID AUTOMATIC REPEAT REQUEST OPERATION AND DECODING STATUS SIGNALING FOR UPLINK MULTIPLE-INPUT MULTIPLE-OUTPUT - Systems and methodologies are described that facilitate conveying decoding statuses in a wireless communication environment. A UE can transmit a plurality of codewords as part of an uplink multiple-input multiple-output (MIMO) transmission to a base station. The base station can receive and attempt to decode the plurality of codewords. Further, decoding statuses for the plurality of codewords can be determined. Moreover, the decoding statuses for the plurality of codewords can be signaled to the UE. For example, the decoding statuses for the plurality of codewords can be conveyed via a single PHICH. According to another example, multiple PHICHs can convey the decoding statuses. Pursuant to a further example, the decoding statuses can be conveyed at least in part via a PDCCH. | 02-03-2011 |
20110026631 | PHYSICAL UPLINK CONTROL CHANNEL (PUCCH) RESOURCE MAPPING WITH TRANSMIT DIVERSITY - Certain aspects of the present disclosure relate to techniques for control channel resource mapping with transmit diversity. In an aspect, a method for wireless communications is provided with includes transmitting a signal associated with a downlink control channel, where the downlink control channel spans at least one group of resource elements (REs), and the group of REs indicates a first orthogonal resource to be used by a user equipment (UE). The method also includes signaling a second orthogonal resource to be used by the UE. | 02-03-2011 |
20110032838 | MITIGATION OF CRS MISALIGNMENT IN COORDINATED MULTIPOINT COMMUNICATIONS - Certain aspects of the present disclosure relate to a method for coordinated multipoint wireless communications. A technique for joint processing of misaligned reference signals in coordinated multipoint communications is provided. In one aspect, a cell may transmit an offsetting reference signal which, when processed by a receiving user equipment, at least partially cancels a first reference signal transmitted by the cell. | 02-10-2011 |
20110038329 | EFFICIENT CONTROL CHANNEL DECODING IN CoMP COMMUNICATIONS - Certain embodiments of the present disclosure propose two efficient designs for a control channel in a Coordinated Multi-Point (CoMP) system. The proposed designs enable a user equipment (UE) to transmit acknowledgement (ACK) and negative acknowledgement (NACK) signals to one or more access points (APs) upon receiving transmissions from them. | 02-17-2011 |
20110038330 | ROBUST DECODING OF CoMP TRANSMISSIONS - Techniques for transmitting data and resource signals (RS) are provided. According to certain aspects, an access point may determine RS resource locations related to one or more access points in a CoMP set transmitting a common reference signal (CRS), map data transmissions initially over resources other than those related to the RS resource locations, and map remaining data transmissions over resources related to the RS resource locations. According to certain aspects, a wireless device may receive a signal from access points in a coordinated multiple point (CoMP) communication set comprising a common reference signal (CRS) superimposed over data, determine CRS locations in the signal that correspond to the CRS, and decode data from the signal based at least in part on the determined CRS locations. | 02-17-2011 |
20110039499 | DYNAMIC SELECTION OF RANDOM ACCESS CHANNEL CONFIGURATIONS - Systems and methodologies are described that facilitate dynamic selection of a random access channel configuration. Typically, a single random access channel configuration is utilized throughout a cell; however, the configuration employed, while appropriate for some mobile devices within the cell, can introduce unnecessary overhead for other mobile devices. A mobile device can measure a characteristic of a radio link between the mobile device and a base station. The measurement can be compared to a set of thresholds provided by the base station. Based upon the comparison, a random access channel configuration can be selected from a set of formats. The selected configuration can be utilized to initiate random access procedures. | 02-17-2011 |
20110044296 | UPLINK POWER CONTROL FOR MULTIPLE TRANSMIT ANTENNAS - Techniques for controlling the transmit power of a user equipment (UE) using multiple antennas for uplink transmission are described. In one design, the UE receives at least one transmit power control (TPC) command for the multiple antennas. The UE adjusts the transmit power for each antenna based on the TPC command(s). In one design, the UE receives a single TPC command for all antennas and adjusts the transmit power for each antenna based on this TPC command. All antennas may then have equal transmit power. In another design, the UE receives multiple TPC commands for multiple antenna groups, one TPC command for each antenna group. Each antenna group may include one antenna or more than one antenna. The UE adjusts the transmit power for each antenna group based on the TPC command for that antenna group. All antennas in each antenna group may have equal transmit power. | 02-24-2011 |
20110085460 | REPORTING OF TIMING INFORMATION TO SUPPORT DOWNLINK DATA TRANSMISSION - Techniques for reporting timing information to facilitate data transmission on a downlink are described. A user equipment (UE) may receive signals from a plurality of cells available for data transmission to the UE. Each cell may have a different propagation delay to the UE. The UE may determine timing information based on the received signals and may report the timing information to one or more of the cells. The timing information may include a receive time of each cell at the UE. The UE may receive a data transmission from at least one cell, which can be selected from the plurality of cells, based on the timing information. The at least one cell may provide a coordinated or a non-coordinated data transmission. A coordinated transmission mode may be determined based on the timing information and can include, for example, a joint transmission, a coordinated beamforming, or a coordinated silencing. | 04-14-2011 |
20110090983 | TRANSMISSION STRATEGY IN MBSFN SUBFRAMES - Certain aspects of the present disclosure relate to techniques for adjusting transmission gap between Multicast Broadcast Single Frequency Network (MBSFN) symbols and non-MBFSN symbols within a MBSFN subframe. | 04-21-2011 |
20110103498 | METHOD AND APPARATUS FOR CONTROL AND DATA MULTIPLEXING IN A MIMO COMMUNICATION SYSTEM - Systems and methodologies are described herein that facilitate control and data multiplexing for uplink (UL) multiple-input-multiple-output (MIMO) communication within a wireless communication system. As described herein, a device conducting uplink MIMO communication in a wireless communication system can multiplex control signaling and data across one or more of a plurality of layers (e.g., corresponding to spatial layers, codewords, etc.) associated with an uplink transmission. Techniques are described herein for selecting layers of a transmission on which to schedule control signaling and selecting offsets to apply to the control signaling scheduled on selected layers. Further, techniques are described herein for leveraging a multi-layer transmission to increase the efficiency of acknowledgement communication. In addition, techniques are described for selecting a modulation and coding scheme (MCS) to apply to control signaling that is combined with data in an uplink multi-layer transmission. | 05-05-2011 |
20110103510 | RANK AND PRECODING INDICATION FOR MIMO OPERATION - Certain aspects of the present disclosure relate to a technique for signaling rank and precoding indications in uplink and downlink MIMO operations using codebook and non-codebook based precoding. | 05-05-2011 |
20110105137 | RANK AND PRECODING INDICATION FOR MIMO OPERATION - Certain aspects of the present disclosure relate to a technique for signaling rank and precoding indications in uplink and downlink MIMO operations using codebook and non-codebook based precoding. | 05-05-2011 |
20110110246 | TRANSMISSION OF FEEDBACK INFORMATION FOR MULTI-CARRIER OPERATION - Techniques for sending feedback information for multi-carrier operation are described. In an aspect, feedback information may be sent on an uplink carrier that may or may not be paired with a downlink carrier on which data transmission is sent. A user equipment (UE) may receive data transmission on a downlink carrier among a plurality of downlink carriers. The UE may determine feedback information for the data transmission, determine an uplink carrier to use to send the feedback information from among a plurality of uplink carriers, and send the feedback information on the uplink carrier. In another aspect, feedback information for multiple downlink carriers may be sent on at least one uplink carrier using Single-Carrier Frequency Division Multiple Access (SC-FDMA). A UE may receive data transmissions on a plurality of downlink carriers, determine feedback information for the data transmissions, and send the feedback information on at least one uplink carrier using SC-FDMA. | 05-12-2011 |
20110110398 | METHOD AND APPARATUS FOR INTERACTION OF CELL-SPECIFIC AND USER-EQUIPMENT-SPECIFIC SOUNDING REFERENCE SIGNAL PERIODICITY AND OFFSET - Certain aspects of the present disclosure relate to a technique for enabling transmission of sounding reference signals for uplink and downlink scheduling. | 05-12-2011 |
20110110455 | RANK AND PRECODING INDICATION FOR MIMO OPERATION - Certain aspects of the present disclosure relate to a technique for signaling rank and precoding indications in uplink and downlink MIMO operations using codebook and non-codebook based precoding. | 05-12-2011 |
20110111781 | REFERENCE SIGNALING FOR A HIGH-MOBILITY WIRELESS COMMUNICATION DEVICE - A base station for enabling communication with a high-mobility wireless communication device is described. The base station includes a processor and instructions stored in memory. The base station identifies a high-mobility wireless communication device and sends a reference signal configuration. The base station also allocates an additional specific reference signal and sends the additional specific reference signal to the high-mobility wireless communication device. | 05-12-2011 |
20110116455 | TRANSMISSION OF FEEDBACK INFORMATION FOR DATA TRANSMISSIONS ON MULTIPLE CARRIERS - Techniques for sending feedback information for multi-carrier operation are described. In an aspect, feedback information for data transmissions on multiple downlink carriers may be sent on at least one uplink resource determined based on at least one downlink resource used to send at least one downlink grant for the data transmissions. In another aspect, feedback information for data transmissions on multiple downlink carriers may be sent with reduced or no orthogonal spreading to enable more feedback information to be sent. In yet another aspect, feedback information for data transmissions on multiple downlink carriers may be sent with channel selection. A UE may send a transmission of at least one signal value on at least one resource to convey acknowledgement (ACK) information for data transmissions on multiple downlink carriers. The signal value(s) and resource(s) may be determined based on the content of the ACK information. | 05-19-2011 |
20110129009 | METHOD AND SYSTEM FOR EFFICIENT CHANNEL ESTIMATION - Aspects of the present disclosure describe an efficient channel estimation algorithm for high-speed processing of dedicated reference signals. The channel estimation algorithm may utilize one or more compressed interpolation matrices. The compressed interpolation matrices may be selected based on the Doppler value and signal to noise ratio (SNR) of the channel. | 06-02-2011 |
20110141927 | PRECODING CONTROL CHANNELS IN WIRELESS NETWORKS - Systems and methodologies are described that facilitate precoding signals transmitted over downlink control channels to provide transmit diversity. A dedicated reference signal (DRS) related to a wireless device can additionally be precoded such that the wireless device can determine a precoder or related parameters based at least in part on performing a channel estimate for the precoded DRS signal. The wireless device can utilize the determined precoder or related parameters to decode precoded signals received over downlink control channel resources. Additionally or alternatively, an access point can signal a sequence of precoders to the wireless device. The access point can cycle through the sequence of precoders to precode signals for transmission over downlink control channel resources, and the wireless device can decode the signals based at least in part on similarly cycling through the precoders for received signals. | 06-16-2011 |
20110141971 | MECHANISMS FOR INFORMATION EXCHANGE ACROSS CELLS TO FACILITATE RECEPTION IN A HETEROGENEOUS NETWORK - A method, an apparatus, and a computer program product for wireless communication are provided in which a signal including a signal from a UE is received. System information of a neighboring eNodeB is obtained. The received signal is processed based on the system information in order to enhance the received signal with respect to the signal from the UE. | 06-16-2011 |
20110141982 | TRANSMISSION OF REFERENCE SIGNAL ON NON-CONTIGUOUS CLUSTERS OF RESOURCES - Techniques for transmitting a reference signal on multiple non-contiguous clusters of resources are described. A user equipment (UE) may be scheduled for data transmission on the multiple non-contiguous clusters, and each cluster may cover a set of contiguous subcarriers. The UE may generate the reference signal based on at least one reference signal (RS) sequence using code division multiplexing (CDM) or frequency division multiplexing (FDM). In an design, the UE generates the reference signal with CDM based on a single RS sequence having a length matching the total length of the multiple non-contiguous clusters. In another design, the UE generates the reference signal with CDM based on one RS sequence for each cluster. In yet another design, the UE generates the reference signal with FDM and transmits the reference signal on a subset of all subcarriers for the multiple non-contiguous clusters. | 06-16-2011 |
20110143762 | SYSTEMS, APPARATUS AND METHODS FOR PHYSICAL RANDOM ACCESS CHANNEL PROCESSING - Systems and methods for processing a physical random access channel are provided. In some embodiments, a method can include: receiving a signal indicative of a strong user and a desired user on a physical random access channel; performing at least one of a single segment frequency domain detection or a multi-segment frequency domain detection on the signal indicative of a strong user and a desired user; generating a residual signal by cancelling out the signal indicative of a strong user; and obtaining a message transmitted by a user equipment by performing at least one of the single segment frequency domain detection or multi-segment frequency domain detection on the residual signal. | 06-16-2011 |
20110164707 | UTILIZATION OF A KNOWN PORTION OF A PAYLOAD TO DECODE A PAYLOAD HAVING A KNOWN AND AN UNKNOWN PORTION - A method, an apparatus, and a computer program product for wireless communication are provided in which a payload is received, the payload having a known portion and an unknown portion. The payload is decoded through correlation, where correlation includes the generation of a plurality of payload hypothesis based on possible combinations of the unknown portion and using the known portion and the generation of a metric value based on each of the plurality of payload hypothesis. The received payload is selected through a determination of the payload hypothesis having a largest generated metric value. | 07-07-2011 |
20110182252 | NETWORK-ASSISTED CELL ACCESS - Providing for access point assisted signal acquisition for heterogeneous access point wireless networks is described herein. By way of example, a closed subscriber group (CSG) base station, such as a home NodeB (HNB) can be configured to provide temporary, limited access to a UE that is not authorized to access the HNB. Upon receiving and rejecting an access probe, the HNB can negotiate with a surrounding macro network to provide service for the UE. Further, the HNB can forward signal acquisition data, to assist in proper decoding of pilot or synchronization signals of the macro network. In particular aspects, the HNB can reduce power or blank transmissions on reserved access resources to reduce interference for the UE. By these and other disclosed mechanisms, the HNB can assist a non-CSG subscriber to obtain network service, and mitigate interference effects due to proximity to the UE. | 07-28-2011 |
20110188466 | FACILITATING NOISE ESTIMATION IN WIRELESS COMMUNICATION - Providing for noise estimation in wireless communication, and particularly for access request signals transmitted by a user equipment (UE), is described herein. By way of example, a wireless signal receiver can employ unused signal dimensions of a wireless network for noise estimation. In addition, the unused signal dimensions can be selected for time-frequency resources that are associated with a particular wireless channel, in order to obtain a noise estimate for that channel. By employing unused signal dimensions, a noise measurement is likely to include no other signal transmissions, and provide an accurate estimate of noise on that channel. According to various aspects of the subject disclosure, one or more Chu sequences employed for signal transmissions, root sequences thereof, or one or more cyclic shifts of a root sequence can be employed for the unused signal dimension. | 08-04-2011 |
20110188587 | MIMO RELATED SIGNALING IN WIRELESS COMMUNICATION - Certain aspects of the present disclosure relate to techniques for multiple-input multiple-output (MIMO) related signaling in a wireless communication system. In an aspect, a method for wireless communication is provided which includes receiving a signal associated with a downlink control channel, the signal including information specific to a user equipment (UE); and selecting, based on the information, a UE-specific reference signal (RS) pattern from a plurality of UE-specific RS patterns. | 08-04-2011 |
20110190024 | INTERFERENCE MITIGATION BY PUNCTURING TRANSMISSION OF INTERFERING CELLS - Systems and methodologies are described that facilitate controlling interference in a heterogeneous wireless communication environment. A Physical Broadcast Channel (PBCH) transmission from an interfering base station can be punctured based upon a puncturing pattern as a function of a cell identifier (ID) and a transmit time. Puncturing can be effectuated by applying power control. Thus, a punctured symbol or subframe can have a reduced transmit power or a transmit power set to zero. Further, the puncturing pattern can be defined on a subframe basis or on a symbol basis. | 08-04-2011 |
20110195684 | METHODS AND APPARATUS FOR INTERFERENCE DECREASE/CANCELLATION ON DOWNLINK ACQUISITION SIGNALS - A method, an apparatus, and a computer program product for receiving a signal including components from a plurality of cells, estimating a channel from the received signal using one or more channel estimation schemes, removing a component signal using the estimated channel from the received signal to generate a processed signal and detecting a residual signal in the processed signal. | 08-11-2011 |
20110216842 | TRANSMISSION OF UE-SPECIFIC REFERENCE SIGNAL FOR WIRELESS COMMUNICATION - Techniques for transmitting UE-specific reference signals (UE-RSs) in a wireless network are described. In an aspect, a UE-RS may be transmitted in different manners depending on the number of layers used for data transmission. In one design, a cell may determine subcarriers for a UE-RS based on a frequency shift if data is transmitted on one layer and based on a predetermined set of subcarriers (with no frequency shift) if data is transmitted on multiple layers. In another aspect, a UE-RS may be transmitted on subcarriers determined based on a frequency shift for data transmission on multiple layers. In yet another aspect, a UE-RS may be transmitted from a plurality of cells to a UE for coordinated multi-point (CoMP). In yet another aspect, a UE-RS may be transmitted in a data section of a subframe including only the data section. | 09-08-2011 |
20110235555 | EFFICIENT RESOURCE UTILIZATION IN TDD - In a wireless communication system unused resource elements are utilized to transmit additional pilot and control signals. The additional pilot and control signals may mitigate the impact of interference. The unused resource elements may be in a downlink pilot timeslot (DwPTS) in a time division duplex system. | 09-29-2011 |
20110243012 | FEEDBACK OF CONTROL INFORMATION FOR MULTIPLE CARRIERS - Techniques for sending control information relating to multiple downlink carriers and data on a single uplink carrier are described. A user equipment (UE) may be scheduled to transmit on a designated uplink carrier. The UE can multiplex control information for multiple downlink carriers with data for transmission on the uplink carrier in a same subframe. Multiplexing may be performed according to a type of the control information and/or an ordering, priority, or association of the downlink carriers. The UE can selectively encode the control information separately for each downlink carrier and/or jointly across downlink carriers. The control information may be mapped to a single layer or multiple layers of a data channel. The UE may send the multiplexed control information and data on the data channel in the subframe while maintaining a single-carrier waveform. | 10-06-2011 |
20110255484 | DOWNLINK ASSOCIATION SET FOR UPLINK ACK/NACK IN TIME DIVISION DUPLEX SYSTEM - In a Time Division Duplex (TDD) system, downlink and uplink communications share the same bandwidth but occupy different subframes. When the downlink has more subframes than the uplink, special treatment on user equipment (UE) ACK/NACK feedback is needed. One uplink may need to ACK multiple downlink subframes. A downlink association without unnecessary ACK/NACK resources sets accounts for subframes for which ACK feedback is not desired. Examples of such subframes include: a blank subframe; an almost blank subframe where only a cell specific Reference Signal (RS) is transmitted; a Time Division Multiplex (TDM) partition in which an evolved NodeB (eNB) only transmits a Physical Downlink Shared Channel (PDSCH) or a Physical Downlink Control Channel (PDCCH) indicating Semi-persistent scheduling (SPS) at certain downlink subframes; a Downlink Pilot Timeslot (DwPTS) with a certain special subframe configuration where an eNB does not send the PDSCH and the UE is not in SPS active mode in the DwPTS; and a Multi-Media Broadcast over a Single Frequency Network (MBSFN) subframe when the UE is not in SPS active mode in the MBSFN subframe. | 10-20-2011 |
20110255486 | METHODS AND APPARATUS FOR CROSS-CELL COORDINATION AND SIGNALING - Methods and apparatus for providing cross-cell signaling and/or coordination for interference mitigation in wireless communication networks are described. In one aspect, a UE associated with a serving eNB may receive control signaling from another non-serving eNB in a different cell. The control signaling may be consistent with a characteristic of the serving eNB and associated cell. In another aspect, multiple eNBs may coordinate transmission of DL resources to minimize collisions of control signaling resources. | 10-20-2011 |
20110255489 | HETEROGENEOUS NETWORK PARTITION IN TDD BEYOND RADIO FRAME - Maintaining uplink hybrid automatic repeat request (HARQ) compatibility with extended radio frames includes partitioning subframe groups over an extended radio frame having a length of time greater than a time defined for a single radio frame. User equipment (UE) suspends PUSCH (physical uplink shared channel) retransmission in the extended radio frame, in accordance with hybrid automatic repeat request (HARQ) timing of a subframe group assigned to the UE. | 10-20-2011 |
20110261673 | MODIFIED SPATIAL DIVERSITY SCHEMES FOR COVERAGE ENHANCEMENT - In one aspect, a method to enhance coverage in a heterogeneous wireless network wireless communication is disclosed. The method includes generating a reference signal indicating a plurality of transmit antenna ports and generating modulation symbols. Modulation symbols are assigned to each of the plurality of transmit antenna ports, in accordance with a spatial diversity coding scheme for the plurality of transmit antenna ports. At least one of the modulation symbols assigned to at least one of the plurality of transmit antenna ports is muted prior to transmission in accordance with the spatial diversity coding scheme. The non-muted modulation symbols and the reference signal are transmitted on the other of the plurality of transmit antenna ports. | 10-27-2011 |
20110268049 | APPARATUS AND METHOD FOR RANDOM ACCESS SIGNALING IN A WIRELESS COMMUNICATION SYSTEM - An apparatus and method for providing random access signaling in a multiple input multiple output (MIMO) wireless communication system are provided. The apparatus and method determine a random access transmission scheme for the MIMO communication system based at least in part on a number of transmit antennas in the system. The random access signals are transmitted in a random access channel using the random access transmission scheme. Power control for the random access channel is performed based at least in part on the random access transmission scheme. | 11-03-2011 |
20110268080 | METHOD AND APPARATUS FOR CONTROL AND DATA MULTIPLEXING IN WIRELESS COMMUNICATION - A method of wireless communication includes determining a number of symbols for uplink control information (UCI) on each of a plurality of layers, multiplexing symbols for the UCI with data on multiple layers such that the symbols are time aligned across the layers, and sending the multiplexed symbols on the multiple layers on uplink. In some designs, the number of symbols for the UCI may be determined based on a spectral resource parameter. | 11-03-2011 |
20110273992 | CARRIER PRECONFIGURATION FOR PDCCH MONITORING IN MULTI-CARRIER SYSTEMS - Certain aspects of the present disclosure relate to techniques for carrier preconfiguration for monitoring for transmissions of downlink control information (DCI), for example, conveyed in physical downlink control channel (PDCCH) transmissions utilizing multiple carriers. The methods and apparatuses described herein may be applied in both frequency division duplex (FDD) and time division duplex (TDD) systems. | 11-10-2011 |
20110274097 | DETECTING AND REPORTING PHYSICAL-LAYER CELL IDENTIFIER COLLISIONS IN WIRELESS NETWORKS - Physical-Layer Cell Identifier (PCID) collisions may occur in a wireless network when two neighboring evolved Node Bs (eNBs) having different Global Cell Identifiers (GCID) select identical PCIDs. Evolved Node Bs may uniquely identify themselves by transmitting on a broadcast channel, such as a Physical Broadcast Channel (PBCH), a pattern of bits corresponding to the eNB's GCID. Individual User Equipments (UEs) may recognize the PCID collision by decoding the PBCH payload to identify different GCID-modulated payloads from two eNBs involved in the PCID collision. Alternatively, UEs may detect PCID collisions in the wireless network by monitoring Primary Synchronization Signals (PSS) and Secondary Synchronization Signals (SSS) on the PBCH for identical signals separated by a relatively large time offset. After detecting a PCID collision, the UEs may attempt by best effort to report the PCID collision, may report to a fallback eNB, or the UEs may use special resources on an uplink channel. | 11-10-2011 |
20110280200 | HARDWARE IMPLEMENTATION OF UPLINK RECEIVER WITH MATCHED THROUGHPUT - Certain aspects of the present disclosure provide an apparatus and techniques for efficiently processing uplink communications. A telecommunications receiver processor architecture is provided that may be utilized with a LTE eNodeB base station wherein the data path throughput is optimally matched for a Physical Uplink Shared Channel (PUSCH) receiver. According to certain aspects, the receiver may be configured to perform operations on OFDMs symbols in an interleaved order. Additionally, the receiver may instantiate multiple IDFT engines to process multiple OFDM symbols in parallel. | 11-17-2011 |
20110286376 | PER-CELL TIMING AND/OR FREQUENCY ACQUISITION AND THEIR USE ON CHANNEL ESTIMATION IN WIRELESS NETWORKS - A method, an apparatus, and a computer program product for wireless communication are provided in which a system timing is estimated, derived from timing of one or more cells, a timing offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the timing offsets. In addition, a method, an apparatus, and a computer program product for wireless communication are provided in which a carrier frequency is estimated, derived from a frequency of one or more cells, a frequency offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the frequency offsets. | 11-24-2011 |
20110287792 | METHOD AND APPARATUS FOR FACILITATING A LAYERED CELL SEARCH FOR LONG TERM EVOLUTION SYSTEMS - A method for ranking signals isolates and cancels neighboring cells using layering. Received signals from various cells are grouped into layers, with each layer comprised of received signals which are comparable within a particular metric (such as signal strength). The signals within a particular layer may also be ranked according to a desired metric. At the beginning of a cancellation cycle the UE may perform the layering and ranking. Once the layering and ranking has been performed the UE may continue to use the layering and ranking for later rounds of cancellation, freeing up processing resources that would otherwise be dedicated to repeated ranking of received signals. After a period of time, the cancellation cycle may repeat and the layering and ranking may be performed again. | 11-24-2011 |
20110292875 | APPARATUS AND METHOD FOR PHYSICAL BROADCAST CHANNEL (PBCH) DECODING FOR MULTIPLE CELLS - A method of wireless communication includes generating a list of cells for physical broadcast channel (PBCH) decoding. The method also includes allocating memory for decoding and cancelling a subset of cells from the generated cell list. The method further includes storing information related to subsets of cells from the generated list in the allocated memory during different time periods. The allocated memory is sufficient for attempting, at each time period, decoding of each subset of cells and cancelling of decoded cells in each subset. The method further includes cycling through the generated cell list by processing each subset of the cell list during the different time periods. | 12-01-2011 |
20110317670 | TD-LTE HETNET PARTITION - Downlink (DL) subframes and DL hybrid automatic repeat request (HARQ) messages may be protected by time division multiplexing (TDM) partitioning. However, TDM partitioning may not be required for uplink (UL) subframes in general. For example, information carried over a physical uplink control channel (PUCCH), may be protected by frequency division multiplexing (FDM) partitioning. In fact, one UL subframe may correspond to eNBs of multiple power classes. Since TDM partitioning may be required for DL transmissions, one DL sub frame may not correspond to the eNBs of multiple power classes. For some embodiments, groups of subframes may be allocated to the different power classes. Therefore, subframes allocated to an eNB of a power class may observe reduced or no interference from eNBs of other power classes. | 12-29-2011 |
20120008516 | TTL OPERATIONS FOR SMALL RB ASSIGNMENTS - Certain aspects of the present disclosure provide techniques for wireless communications, wherein more accurate timing offset calculations may be achieved for uplink transmissions with a relatively small number of assigned resources. | 01-12-2012 |
20120008555 | TRANSMIT AND RECEIVE PROCESSING IN THE PRESENCE OF INTERFERENCE IN A WIRELESS NETWORK - A method for communicating in a wireless network includes receiving a signal intended to be spread over a first subcarrier and a second subcarrier. The method also includes determining the first subcarrier is subject to interference, and in this case decoding the received signal on the second subcarrier without demodulating the signal on the first subcarrier. The signal is intended to be spread in the frequency domain over multiple subcarriers or intended to be coded based on SFBC (space frequency block codes). The first and second subcarriers may be consecutive. Rate matching around the first stream or puncturing of the first stream enables proper decoding of the SFBC stream. Changing the spreading factor enables proper decoding in the case of frequency domain spreading over multiple streams. | 01-12-2012 |
20120014318 | MULTIPLEXING DEMODULATION REFERENCE SIGNALS IN WIRELESS COMMUNICATIONS - Methods and apparatuses are provided for determining cyclic shift (CS) values and/or orthogonal cover codes (OCC) for a plurality of demodulation reference signals (DM-RS) transmitted over multiple layers in multiple-input multiple-output (MIMO) communications. A CS index can be received from a base station in downlink control information (DCI) or similar signaling. Based at least in part on the CS index, CS values for the plurality of DM-RSs can be determined. In addition, OCC can be explicitly signaled or similarly determined from the CS index and/or a configured CS value received from a higher layer. In addition, controlling assignment of CS indices and/or OCC can facilitate providing orthogonality for communications from paired devices in multiuser MIMO. | 01-19-2012 |
20120039279 | ACK/NACK TRANSMISSION FOR MULTI-CARRIER OPERATION - Techniques for acknowledging data transmissions in a multi-carrier wireless communication network are disclosed. In some aspects, a user equipment (UE) receives a data transmission on at least one component carrier (CC) in a plurality of configured CCs. The UE determines acknowledgement/negative acknowledgement (ACK/NACK) information for the data transmission and determines an uplink channel for sending the ACK/NACK information. When the ACK/NACK information is sent on a PUCCH, the UE may perform power control based on which CCs in the plurality of configured CCs data is received. When the ACK/NACK information is sent on a PUSCH, the UE may determine a number of resource elements based on its CC configuration. | 02-16-2012 |
20120039280 | ACK/NACK TRANSMISSION FOR MULTI-CARRIER OPERATION WITH DOWNLINK ASSIGNMENT INDEX - Techniques for acknowledging data transmissions in a multi-carrier wireless communication network are disclosed. In one aspect, a UE determines a number of acknowledgement/negative acknowledgement (ACK/NACK) bits for a data transmission on one more component carriers (CCs) based on information obtained from a grant. The grant may be a downlink grant or an uplink grant, and the information obtained may include a number of CCs scheduled for data transmission and/or identifiers of the scheduled CCs. The UE may determine the number of ACK/NACK bits for acknowledging the data transmission based on the number of scheduled CCs and the identifier of each scheduled CC. | 02-16-2012 |
20120044881 | METHODS AND SYSTEMS FOR UPLINK TRANSMIT DIVERSITY - Certain aspects of the present disclosure propose methods for supporting uplink transmit diversity in a wireless communication system. The proposed methods may eliminate ambiguity in decoding physical downlink control channel aggregation level and resources that are used by different antennas of a user equipment. In addition, a method is proposed for resource allocation for ACK/NACK repetition. | 02-23-2012 |
20120044928 | DETERMINATION OF NETWORK SYNCHRONIZATION - User equipment (UE) associated with synchronous networks operate in a synchronous mode while UEs associated with asynchronous networks operate in an asynchronous mode. When operating in a synchronous mode, a UE can significantly improve performance of synchronization signal detection, data decoding, and tracking loop management by using the interference cancellation (IC) techniques that are not available in an asynchronous mode of operation. Obtaining synchronization indicators and determining the synchronization status of the current network by UE is disclosed. The determination may be based on the synchronization indicator, whether detected through signal detection, signal measurements, signal analysis, or the like. | 02-23-2012 |
20120046056 | SAMPLE SELECTION FOR SECONDARY SYNCHRONIZATION SIGNAL (SSS) DETECTION - Methods and apparatus for selecting samples for secondary synchronization signal (SSS) detection are described. Several alternatives are provided for efficient cell identifier detection. In a first alternative, multiple bursts of a signal received from a cell are sampled with non-uniform spacing between sampling intervals to determine a sequence for cell identification. In a second alternative, samples of a first and a second signal received from a stronger cell are cancelled, and a sequence for detecting a weaker cell is determined by reducing effects of the samples of a third signal received from the weaker cell which do not overlap with the primary synchronization signal (PSS) or SSS of the stronger cell. In a third alternative, a sequence for detecting a weaker cell is determined by reducing effects of any sampled bursts that correspond to a high transmission power portion of a signal from a stronger cell. | 02-23-2012 |
20120057535 | UPLINK COORDINATED MULTIPOINT COMMUNICATIONS IN A WIRELESS NETWORK - Devices, systems, methods and/or computer program products are provided to facilitate coordinated multipoint transmission and reception of communications in a wireless network. In some scenarios, different set of resources are allocated for uplink transmissions of multiple user equipment. In other scenarios collision avoidance and/or multiplexing techniques are used to enable reception and decoding of multiple uplink transmissions on the same or overlapping resources at the same time. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the disclosed subject matter. Therefore, it is to be understood that it should not be used to interpret or limit the scope or the meaning of the claims. | 03-08-2012 |
20120058791 | CHANNEL STATE INFORMATION REFERENCE SIGNALS - In a wireless communication system, from available data resource elements (REs) in a subframe, REs are assigned to transmissions of a reference signal, thereby resulting in a plurality of remaining data REs. Furthermore, REs from the plurality of remaining data REs are assigned for data transmission to a wireless device in groups of a predetermined number of REs such that all assigned data REs within a group are within a predetermined number of symbols of each other in time domain and within a second predetermined number of subcarriers of each other in frequency domain, thereby resulting in at least one ungrouped RE. | 03-08-2012 |
20120076017 | APERIODIC CHANNEL STATE INFORMATION REQUEST IN WIRELESS COMMUNICATION - A method, computer program product, and apparatus are provided in which a request for a channel state information (CSI) report is received on a component carrier of a plurality of component carriers. The request indicates a set of component carriers of the plurality of component carriers for which to provide the CSI report. In addition, a CSI report including feedback for each of the indicated component carriers in the set of component carriers is transmitted. A method, computer program product, and apparatus are provided in which a request for a CSI report on a component carrier of a plurality of component carriers is transmitted. The request indicates a set of component carriers of the plurality of component carriers for which to receive the CSI report. In addition, a CSI report including feedback for each of the indicated component carriers in the set of component carriers is received. | 03-29-2012 |
20120076213 | INTERFERENCE CANCELATION USING EDGE SIGNALS FOR SYNCHRONIZATION SIGNAL DETECTION - In 3GPP Release (Rel) 8, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) may be transmitted in six resource blocks, occupying, for example, the center 62 tones (i.e., subcarriers) of an LTE-A system, wherein the center tone may be skipped. In synchronous networks, cells may transmit their respective PSS and SSS on the same frequency at the same time, wherein strong cells may overshadow the weak ones. However, strong cells may not be the serving cell for a user equipment (UE), particularly in a heterogeneous network. Traditionally, interference cancelation, an enhanced receiver technique, has been used, wherein the UE may first find the strong cells and cancel them out to find the serving cell. However, due to propagation delay and synchronization uncertainty, a timing offset may exist among cells, even in synchronous networks. Therefore, systems and methods are disclosed, providing for improved handling of the timing offset among different cells by applying a time domain cancelation. | 03-29-2012 |
20120093076 | DIMINISHING THE IMPACT OF TIMING DELAY IN DOWNLINK SIGNALS - When performing interference cancellation on selected information (e.g., synchronization signals, certain broadcast signals, etc.) through cross correlation, symbol periods of signals being combined will generally match up. Slight mismatches will generally produce negligible impact on interference cancellation. However, where the mismatch is severe due to significant timing offsets, serious performance degradation may occur, particularly when timing offsets are sufficiently large as to overlap data portions of a transmission. By selectively puncturing resource elements prior to the selected information and/or after the selected information, the selected information may be protected and allow for interference cancellation even in cases of large timing offsets. | 04-19-2012 |
20120093094 | ACKNOWLEDGEMENT BUNDLING IN A MIMO COMMUNICATION SYSTEM - A method of wireless communication comprises receiving a plurality of codewords and transmitting a downlink feedback message by spatially bundling acknowledgments for the received plurality of codewords. In some designs, an accompanying grant message is transmitted with the downlink feedback message. | 04-19-2012 |
20120106439 | CELL SITE MODEM APPLICATION MESSAGE INTERFACE - Certain aspects of the present disclosure relate to a technique for implementing a cell site modem application message interface (CSM API) for a cell site of Long Term Evolution (LTE) wireless system. | 05-03-2012 |
20120115534 | DYNAMIC UPLINK POWER CONTROL - Power adjustment in the user equipment (UE) includes adjusting the transmission power level for each of multiple transport blocks based on the spectral efficiency associated with the transport block. The UE receives a scheduled transport format parameter for each of multiple transport blocks to be transmitted. Based on those scheduled transport format parameters, the UE determines a transmit power level adjustment for each transport block. The UE will adjust the power according to the determined transmit power level adjustment and transmit each transport block using the adjusted power level. | 05-10-2012 |
20120163159 | INTERFERENCE RANDOMIZATION FOR UPLINK SIGNALING - A method for transmitting an acknowledgement/negative acknowledgement is described. Cell-specific symbol-level cyclic shift hopping is applied to data single-carrier frequency division multiplexing symbols of the acknowledgement/negative acknowledgement. A discrete Fourier transform is applied to the data single-carrier frequency division multiplexing symbols. Cell-specific symbol-level phase hopping is applied to the data single-carrier frequency division multiplexing symbols. The data single-carrier frequency division multiplexing symbols are transmitted in a slot. | 06-28-2012 |
20120182946 | RATE MATCHING FOR COORDINATED MULTIPOINT TRANSMISSION SCHEMES - Certain aspects of the present disclosure relate to techniques for determining resource elements REs used for Coordinated Multipoint (CoMP) transmission schemes. The techniques generally include determining, by a User Equipment (UE), a set of data REs used for Coordinated Multipoint (CoMP) operation. The determination is based on a CoMP scheme and data REs available to particular base stations involved in the CoMP operation. The technique further includes processing data received via the CoMP operation on the determined set of data REs. | 07-19-2012 |
20120188950 | METHOD AND APPARATUS FOR BUNDLING RESOURCE BLOCKS IN WIRELESS COMMUNICATION - Methods and apparatuses are provided for bundling resource blocks (RB) for varying bandwidth scenarios in wireless communication. Where multiple access points form a coordinated multiple point (COMP) set for a device. the access points may be configured to use a common RB bundling size for precoding transmissions to the device. In another aspect, where a device is allocated a bandwidth and a bandwidth extension, a RB bundling size may be determined for the bandwidth and bandwidth extension, jointly or individually. The RB bundling size may be determined based on the bandwidth or on the bandwidth and the bandwidth extension. | 07-26-2012 |
20120202493 | METHOD AND APPARATUS FOR COUNTING DEVICES RELATED TO BROADCAST DATA SERVICES - Methods and apparatuses are provided that include counting devices for broadcast data services. The devices can be counted based on registrations received from the devices. This registration count can additionally or alternatively be used to determine whether further counting is desired. In addition, base stations can transmit counting requests to the devices using a paging message or other message such that idle mode devices can receive the counting requests. The idle mode devices can respond to the requests or send autonomous counting report by switching to an active mode for the purpose of responding or another purpose. | 08-09-2012 |
20120213130 | CARRIER AGGREGATION FOR EVOLVED MULTIMEDIA BROADCAST MULTICAST SERVICE ENHANCEMENT - Carrier aggregation to enhance Evolved Multimedia Broadcast Multicast Service (eMBMS) includes transmitting unicast signaling for a unicast service on an anchor carrier to mobile entities, transmitting eMBMS signaling on a second carrier different from the anchor carrier to the mobile entities for use with the unicast signaling, and various techniques for practical application of carrier aggregation for eMBMS enhancement. In addition, allocating subframes used for MBMS on a Single Frequency Network (MBSFN) includes allocating at least a portion of one or more subframes otherwise reserved for unicast subframes on a mixed carrier to provide an increased allocation of subframes carrying MBSFN information, transmitting MBSFN signals on the increased allocation of subframes, and more detailed aspects. | 08-23-2012 |
20120213143 | SYSTEM AND METHOD FOR SINGLE CARRIER OPTIMIZATION FOR EVOLVED MULTIMEDIA BROADCAST MULTICAST SERVICE - Techniques are provided for single carrier optimization. For example, there is provided a method that involves, in a subframe of a radio spectrum, allocating a first set of resource elements (REs) for multimedia broadcast over a single frequency network (MBSFN) transmissions, each symbol corresponding to each RE of the first set having a first cyclic prefix (CP) type. The method may involve allocating a second set of REs for unicast transmissions, each symbol corresponding to each RE of second set having a second CP type. The method may involve determining whether the first CP type and the second CP type are the same. The method may involve, in response to the first CP type and the second CP type being the same, combining the MBSFN transmissions and the unicast transmissions in the subframe according to the allocated first and second sets of REs. | 08-23-2012 |
20120213144 | SPATIAL TECHNIQUES FOR EVOLVED MULTIMEDIA BROADCAST MULTICAST SERVICE ENHANCEMENT - Transmission of eMBMS signals by at least one network entity of a wireless communications system may include coordinating transmission of eMBMS signaling with a remote access point of a wireless communications system to broadcast the eMBMS signaling from a multiple antenna matrix comprising at least one antenna of the network entity and at least one antenna of the access node. The network entity may be an access point. The access point may vary a precoding matrix applied to the eMBMS signaling to transmit from the network entity, or use alternative techniques for providing transmit diversity. Accordingly, the access point may provide transmit diversity for the eMBMS signaling transmitted from the multiple antenna matrix implemented between different cells on the wireless communication network. The access point may vary the precoding matrix to cause cyclical rotation of beam direction for the eMBMS transmissions from different cells of the network. | 08-23-2012 |
20120236741 | POWER CONTROL AND USER MULTIPLEXING FOR HETEROGENEOUS NETWORK COORDINATED MULTIPOINT OPERATIONS - Certain aspects of the present disclosure relate to techniques for power control and user multiplexing for coordinated multi-point (CoMP) transmission and reception in heterogeneous networks (HetNet). | 09-20-2012 |
20120236776 | TARGET CELL SELECTION FOR MULTIMEDIA BROADCAST MULTICAST SERVICE CONTINUITY - Transfer of Multimedia Broadcast/Multicast Services (MBMS) over a Single Frequency Network (MBSFN) service and idle mode unicast service for a mobile entity from a source base station to a target base station may be managed by a base station or mobile entity of a cellular wireless communications system (WCS). Operations related to the transfer may include obtaining an MBMS status of the mobile entity, and/or obtaining MBMS support information for the base station. A network entity may facilitate MBMS discovery by a mobile entity, by transmitting a data element to the mobile entity including service identifiers mapped to corresponding cell identifiers to indicate respective MBMS services to be broadcast in an WCS area on adjacent cells identified by respective ones of the cell identifiers. The MBMS services may be broadcast within the WCS area using the adjacent cells previously indicated in the data element. | 09-20-2012 |
20120269110 | QUALITY OF SERVICE CONTROL IN A MULTICAST TRANSMISSION - A network entity may dynamically control Quality-of-Service (QoS) for a multicast transmission in a wireless communications system, by initiating a multicast transmission having an initial QoS, and later during the multicast transmission, generating an updated QoS for the multicast transmission. The network entity may generate the updated QoS in response to a network load factor for a multicast area aggregated from base stations in the area. The network load factor may indicate a measure of aggregate available bandwidth in the multicast area. The network entity may provide the updated QoS to mobile entities receiving the multicast transmission, which may process a subsequent portion of multicast content according to the updated QoS. | 10-25-2012 |
20120275369 | METHODS AND APPARATUSES FOR MANAGING SIMULTANEOUS UNICAST AND MULTICAST/BROADCAST SERVICES IN A WIRELESS COMMUNICATION SYSTEM - Techniques are provided for managing simultaneous unicast and multicast/broadcast services. For example, there is provided a method operable by a user equipment (UE) or the like, that involves transmitting, upon initial connection with a wireless communication system, a first message indicating one or more capabilities of the UE. The method may further involve transmitting a second message indicating that the UE is receiving or is about to receive a multicast/broadcast service. The method may also involve receiving, as a result of the second message, data scheduled in accordance with one or more predetermined rules. | 11-01-2012 |
20120275399 | SYSTEM AND METHOD FOR SYNCHRONIZED RADIO LINK CONTROL AND MEDIA ACCESS CONTROL IN A WIRELESS COMMUNICATION NETWORK - Techniques are provided for synchronized radio link control (RLC) and/or media access control (MAC). For example, there is provided a method that involves generating an RLC protocol data unit (PDU) according to a segmentation protocol for maximizing RLC PDU size while allowing the RLC PDU to fit into a defined MAC transport block, the RLC PDU comprising at least one RLC service data unit (SDU) or RLC SDU segment. The method may involve determining a PDU data size for each given RLC SDU. The method may further involve (a) attaching a given RLC SDU to the RLC PDU and (b) delivering the RLC PDU to a lower layer, in response to a SDU data size for the given RLC SDU exceeding a defined size limit. | 11-01-2012 |
20120281611 | MANAGING RESERVED CELLS AND USER EQUIPMENTS IN AN MBSFN ENVIRONMENT WITHIN A WIRELESS COMMUNICATION SYSTEM - In a first configuration, an apparatus determines subframes, in a radio frame, used by one or more neighboring BSs for providing services, and sends information to a UE indicating the determined subframes. In a second configuration, an apparatus determines subframes, in a radio frame, used by one or more neighboring BSs for providing services, transmits with a first power in remaining subframes other than the determined subframes in the radio frame, determines a second power based on the first power such that a difference between the second power and the first power is less than a threshold, and transmits with the second power in a subset of symbols in the determined subframes. In a third configuration, an apparatus receives information from a BS indicating subframes, in a radio frame, used by one or more neighboring BSs for providing services, and adjusts an AGC gain based on the indicated subframes. | 11-08-2012 |
20120314591 | TRACKING LOOP DESIGN FOR UNICAST AND MULTICAST/BROADCAST SIGNALS - A method, an apparatus, and a computer program product for wireless communication are provided. In a first configuration, the apparatus maintains a first set of tracking loops associated with unicast signals and a second set of tracking loops associated with multicast/broadcast signals. In addition, the apparatus decoding at least one of a received unicast signal based on the first set of tracking loops or a received multicast/broadcast signal based on the second set of tracking loops. In a second configuration, the apparatus maintains a TTL and a FTL associated with unicast signals based only on received unicast signals. In addition, the apparatus receives a multicast/broadcast signal and decodes the received multicast/broadcast signal based on the TTL and the FTL maintained based only on the received unicast signals. | 12-13-2012 |
20120314630 | BROADCAST BAND SEGMENTATION STRUCTURES TO ENABLE BETTER UTILIZATION OF AVAILABLE SPECTRUM - Systems and methods achieve higher spectral efficiency for broadcast networks based on grouping of band segments to enable effective reuse of radio frequency spectrum that enables realizable filters. This may involve co-location of transmitters for a specific group. The grouping of band segments can be applied in a broadcast architecture in which the broadcast market is served by a plurality of low-power, low height transmitters rather than a single high power, high transmitter antenna. By combining the benefits of grouping band segments with low-power, low-transmitter heights which exhibit shorter jamming ranges, further improvements in bandwidth utilization and availability can be achieved. Such a broadcast network may be deployed on transmission sites of existing cellular telephone networks. Embodiments may enable higher efficiency modulation schemes within existing land mobile formats including using higher order constellations that can be supported for mobile communications or using fixed reception specific mixed input/mixed output (MIMO) configurations. | 12-13-2012 |
20130016705 | ENHANCING SOUNDING REFERENCE SIGNALS (SRS) - A method for enhancing a sounding reference signal (SRS) in a non-root wireless communication device is disclosed. The method determines that all SRS transmissions for the wireless communication device are to occur in an uplink pilot time slot (UpPTS) portion of a transition subframe. The method also determines whether available uplink bandwidth for the UpPTS portion is greater than available uplink bandwidth for a normal uplink subframe. A current SRS is transmitted using the available uplink bandwidth for UpPTS portion when the available uplink bandwidth for the UpPTS portion is greater than available uplink bandwidth for the normal uplink subframe. | 01-17-2013 |
20130021204 | APPARATUS AND METHOD FOR WIRELESS NETWORK ENHANCEMENT VIA VARIABLE DOWN TILT - Apparatus and methods for controlling antenna down tilt in a mixed coordinated/non-coordinated network include receiving one or more input signals defining a waveform to be transmitted, for determining a tilt angle state to be applied to the antenna based on the one or more input signals, and for transmitting a tilt control signal if the determined tilt angle state differs from a current tilt angle state associated with the antenna. | 01-24-2013 |
20130039292 | MITIGATION OF LOST RESOURCE ALLOCATION SYNCHRONIZATION BETWEEN A USER EQUIPMENT (UE) AND AN EVOLVED NODE B (eNodeB) - A method for mitigation of lost resource allocation synchronization between a user equipment (UE) and an evolved Node B (eNodeB) during a Hybrid Automatic Repeat Request (HARQ) transmission and/or retransmission process is described. The method includes determining whether resource allocation is out of synchronization between a user equipment (UE) and an evolved Node B (eNodeB) during a hybrid automatic repeat request (HARQ) transmission and/or retransmission process. The method further includes mitigating a loss of resource allocation synchronization between the UE and the eNodeB during the HARQ transmission and/or retransmission process. | 02-14-2013 |
20130107721 | DISCOVERING AN EVOLVED MULTICAST BROADCAST MULTIMEDIA SERVICE IN SINGLE OR DUAL BAND LTE | 05-02-2013 |
20130114492 | METHOD AND APPARATUS FOR MITIGATING CONTROL CHANNEL ERROR - Methods and apparatuses are provided that include decoding multicast broadcast communications where scheduling information related to a multicast channel is not properly received over a control channel. Media access control (MAC) packets can be decoded to determine whether a MAC subheader indicates the packet relates to a logical channel by indicating an associated channel identifier. Where the channel identifier of the MAC packet matches that of a requested logical channel, data in the MAC packet can be provided to a communications layer. Subsequent packets can be processed and provided to the communications layer until a different channel identifier is encountered. | 05-09-2013 |
20130114497 | EFFICIENT VARIABLE RATE FOR BROADCAST/MULTICAST SERVICE - A method, an apparatus, and a computer program product for wireless communication are provided in which at least one bit rate for allocating network resources from a broadcast-multicast service center (BM-SC) is received. The network resources are then allocated based on the at least one bit rate. Moreover, all evolved Node Bs (eNBs) in a broadcast/multicast area are informed of the network resource allocation. Additionally, the network resources are allocated for a session based on a first bit rate, wherein the first bit rate is greater than a guaranteed bit rate (GBR), and the network resource allocation is adjusted to a second bit rate based on the occurrence of an event, wherein the second bit rate is equal to GBR. | 05-09-2013 |
20130128756 | METHOD AND APPARATUS FOR PHYSICAL LAYER MEASUREMENTS IN MULTICAST BROADCAST MULTIMEDIA SERVICE SYSTEMS - A method, an apparatus, and a computer program product for wireless communication are provided. An apparatus, e.g., user equipment (UE), receives a reporting requirement for one or more Multicast-Broadcast Single Frequency Network (MBSFN) physical layer parameters. The UE obtains the one or more MBSFN physical layer parameters including at least one parameter corresponding to a reference signal, and creates a report based on the obtained one or more MBSFN physical layer parameters. The UE may obtain the one or more MBSFN physical layer parameters using user-plane or control-plane based mechanisms. The user-plane mechanism involves the use of a modified version of the reporting mechanism for Quality of Experience (QoE) metrics. The control-plane mechanism involves the use of a modified version of the reporting mechanism for the Minimization of Drive Tests (MDT) metrics. | 05-23-2013 |
20130128768 | METHOD AND APPARATUS FOR ENHANCING CONTROL CHANNEL TRANSMISSION - Methods and apparatuses are provided that include enhancing decoding of multicast broadcast control communications, which can be of a relatively large size. A configuration message related to a broadcast channel structure can be received in multiple instances and/or segmented data units. A receiver can combine multiple instances and/or accumulate segmented data units to obtain and/or decode a control channel over which the configuration message is communicated. Communicating segmented data units of the configuration message can allow a broadcast station to utilize a lower data rate, more reliable modulation and coding scheme to encode the configuration message. | 05-23-2013 |
20130128792 | NETWORK-ASSISTED CELL ACCESS - Providing for access point assisted signal acquisition for heterogeneous access point wireless networks is described herein. By way of example, a closed subscriber group (CSG) base station, such as a home NodeB (HNB) can be configured to provide temporary, limited access to a UE that is not authorized to access the HNB. Upon receiving and rejecting an access probe, the HNB can negotiate with a surrounding macro network to provide service for the UE. Further, the HNB can forward signal acquisition data, to assist in proper decoding of pilot or synchronization signals of the macro network. In particular aspects, the HNB can reduce power or blank transmissions on reserved access resources to reduce interference for the UE. By these and other disclosed mechanisms, the HNB can assist a non-CSG subscriber to obtain network service, and mitigate interference effects due to proximity to the UE. | 05-23-2013 |
20130136023 | FACILITATING NOISE ESTIMATION IN WIRELESS COMMUNICATION - Providing for noise estimation in wireless communication, and particularly for access request signals transmitted by a user equipment (UE), is described herein. By way of example, a wireless signal receiver can employ unused signal dimensions of a wireless network for noise estimation. In addition, the unused signal dimensions can be selected for time-frequency resources that are associated with a particular wireless channel, in order to obtain a noise estimate for that channel. By employing unused signal dimensions, a noise measurement is likely to include no other signal transmissions, and provide an accurate estimate of noise on that channel. According to various aspects of the subject disclosure, one or more Chu sequences employed for signal transmissions, root sequences thereof, or one or more cyclic shifts of a root sequence can be employed for the unused signal dimension. | 05-30-2013 |
20130195002 | CYCLIC PREFIX IN EVOLVED MULTIMEDIA BROADCAST MULTICAST SERVICE WITH HIGH TRANSMIT POWER - A method, an apparatus, and a computer program product for wireless communication are provided in which a cyclic prefix duration for orthogonal frequency division multiple access symbols is determined. The cyclic prefix duration is calculated to reduce inter-symbol interference associated with a transmitter located at a distance that is more than 5 kilometers from one or more user equipment. Subcarrier spacing is determined and a symbol size for the symbols is determined. One or more of an enhanced Node B and a user equipment is configured with the cyclic prefix duration, the subcarrier spacing and the symbol size. | 08-01-2013 |
20130231123 | PER-CELL TIMING AND/OR FREQUENCY ACQUISITION AND THEIR USE ON CHANNEL ESTIMATION IN WIRELESS NETWORKS - A method, an apparatus, and a computer program product for wireless communication are provided in which a system timing is estimated, derived from timing of one or more cells, a timing offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the timing offsets. In addition, a method, an apparatus, and a computer program product for wireless communication are provided in which a carrier frequency is estimated, derived from a frequency of one or more cells, a frequency offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the frequency offsets. | 09-05-2013 |
20130235783 | EVOLVED MULTIMEDIA BROADCAST MULTICAST SERVICE CAPACITY ENHANCEMENTS - A method, an apparatus, and a computer program product for wireless communication are provided in which a first cell receives a configuration identifying a plurality of transmission layers in a multi-layer spatial multiplexing scheme of a Multi-Media Broadcast over a Single Frequency Network (MBSFN). The configuration may identify resource block allocations to transmission layers, seed values for pattern generation, and timing information used to allocate resource blocks to transmission layers. The first cell transmits a first set of resource blocks during a first period of time using a first transmission layer to one or more user equipments (UE) located in the MBSFN. Another cell located in the MBSFN may concurrently transmit a second set of resource blocks to the UE in a second transmission. | 09-12-2013 |
20130242927 | Measuring Neighboring Cell Loading in Wireless Communications - Systems and methodologies are described that facilitate detecting cell interference and/or loading by analyzing control data transmitted between devices communicating in the cell. Control data resources can be transmitted related to communication received over data channels, and the control data resources can comprise quality indicators related to the data as well as resource identifiers that specify a resource over the data channel related to the data. Multiple control data resources can be transmitted per communication specifying a beginning and ending resource identifier of related data channel resources. If this control data is decodable at a wireless device, the associated resources corresponding to the resource identifiers can be marked as interfered and/or avoided in subsequent communication or resource allocation requests by the wireless device. | 09-19-2013 |
20130258935 | EXTENDING CYCLIC PREFIX LENGTH IN WIRELESS COMMUNICATION NETWORK HAVING MIXED CARRIER - A method, an apparatus, and a computer program product are provided for receiving unicast and multicast-broadcast single frequency network (MBSFN) signals from an eNB in a subframe. The apparatus receives at least one transmission in the subframe, the subframe divided into six partitions and for receiving at least one unicast symbol and a plurality of multicast-broadcast single frequency network (MBSFN) symbols, each of the at least one unicast symbol and the plurality of MBSFN symbols having an associated cyclic prefix (CP). The apparatus further receives at least one unicast signal including the at least one unicast symbol at a first partition of the subframe, and receives at least one MBSFN signal including the plurality of MBSFN symbols respectively at a second partition through sixth partition of the subframe, each MBSFN symbol having the associated CP with a length of at least 33.33 μs. | 10-03-2013 |
20130267202 | SECURE RECEPTION REPORTING - In a first configuration, a UE receives, from a service provider, a certificate authority list. The certificate authority list is at least one of integrity protected or encrypted based on a credential known by the UE and the service provider and stored on a smartcard in the UE. The UE authenticates a server using the received certificate authority list. In a second configuration, the UE receives a user service discovery/announcement including a reception report configuration and an address of a server. The UE sends a protected reception report to the server based on the reception report configuration. In a third configuration, the UE receives a protected broadcast announcement and communicates based on the broadcast announcement. The broadcast announcement is at least one of integrity protected or encrypted based on a credential known by the UE and stored on a smartcard in the UE. | 10-10-2013 |
20130272185 | METHOD AND APPARATUS FOR ENHANCING CONTROL CHANNEL TRANSMISSION - Methods and apparatuses are provided that include enhancing decoding of multicast broadcast control communications, which can be of a relatively large size. A configuration message related to a broadcast channel structure can be received in multiple instances and/or segmented data units. A receiver can combine multiple instances and/or accumulate segmented data units to obtain and/or decode a control channel over which the configuration message is communicated. Communicating segmented data units of the configuration message can allow a broadcast station to utilize a lower data rate, more reliable modulation and coding scheme to encode the configuration message. | 10-17-2013 |
20130294321 | SMOOTH TRANSITION BETWEEN MULTIMEDIA BROADCAST MULTICAST SERVICE (MBMS) AND UNICAST SERVICE BY DEMAND - Techniques are provided for smooth transition between broadcast/multicast transmission and unicast transmission. A method for managing unicast and multicast services switching in a multi-band/multi-frequency wireless communications system (WCS) capable of both unicast and multicast signaling includes determining whether an aggregate demand for a content provided via dedicated unicast transmissions exceeds a threshold. The method includes switching transmission of the content from the dedicated unicast transmissions on one frequency to a multicast transmission on a second or more frequencies in response to determining that the aggregate demand exceeds the threshold. | 11-07-2013 |
20140126454 | EMBMS SUPPORT IN HETEROGENEOUS NETWORK - A method, an apparatus, and a computer program product for wireless communication at a node are provided. The apparatus receives a multicast-broadcast single frequency network (MBSFN) signal transmitted from a base station, decodes the received MBSFN signal, and retrieves at least one source symbol from the decoded MBSFN signal when the node is capable of retrieving a source symbol. The apparatus also generates at least one redundancy version of the MBSFN signal based on the retrieved at least one source symbol and transmits the at least one redundancy version of the MBSFN signal via MBSFN. Generating a redundancy version of the MBSFN signal includes applying forward error correction (FEC) on the retrieved at least one source symbol to generate at least one repair symbol. Thus, a redundancy version of the MBSFN signal includes the at least one repair symbol and a subset of the at least one source symbol. | 05-08-2014 |
20140134970 | EMERGENCY ALERT USING MBMS AND CELL BROADCASTING - An emergency notification service is described that is delivered using an evolved multimedia broadcast-multicast service (eMBMS). An emergency notification is sent out to user equipment (UE) in affected areas. In response to receiving the emergency notification, the UE searches the appropriate emergency multicast service acquisition information for multiple potential types of available emergency content that is provided by the eMBMS system in the network and tunes to the eMBMS to receive the emergency content. In selected aspects, the transmitted information, including the notifications and content may be scrambled using the same cell ID for each of the cells transmitting the same content. This improves the quality of the transmitted signals allowing for more reliable receipt and decoding by the receiving UEs. | 05-15-2014 |
20140153471 | ALLOWING UNICAST SUBFRAME STRUCTURE FOR EMBMS - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives a multicast/broadcast single frequency network (MBSFN) subframe configured based on a unicast subframe structure, and transmits MBSFN signals for eMBMS using the MBSFN subframe. In a one configuration, the MBSFN subframe structure for eMBMS transmissions uses the same CP length, the same common reference signal (CRS) pattern and same subframe structure used for unicast, along with the same antenna ports used for unicast transmission. In another configuration, the MBSFN subframe structure for eMBMS transmissions uses the same CP length and same subframe structure used for unicast, but potentially different CRS patterns and different antenna ports from those used for unicast transmissions. In another configuration, the MBSFN subframe structure for eMBMS transmission uses the same CP length and same subframe structure used for unicast, but with a UE-RS pattern. | 06-05-2014 |
20140161043 | SAMPLE SELECTION FOR SECONDARY SYNCHRONIZATION SIGNAL (SSS) DETECTION - Methods and apparatus for selecting samples for secondary synchronization signal (SSS) detection are described. Several alternatives are provided for efficient cell identifier detection. In a first alternative, multiple bursts of a signal received from a cell are sampled with non-uniform spacing between sampling intervals to determine a sequence for cell identification. In a second alternative, samples of a first and a second signal received from a stronger cell are cancelled, and a sequence for detecting a weaker cell is determined by reducing effects of the samples of a third signal received from the weaker cell which do not overlap with the primary synchronization signal (PSS) or SSS of the stronger cell. In a third alternative, a sequence for detecting a weaker cell is determined by reducing effects of any sampled bursts that correspond to a high transmission power portion of a signal from a stronger cell. | 06-12-2014 |
20140161044 | SAMPLE SELECTION FOR SECONDARY SYNCHRONIZATION SIGNAL (SSS) DETECTION - Methods and apparatus for selecting samples for secondary synchronization signal (SSS) detection are described. Several alternatives are provided for efficient cell identifier detection. In a first alternative, multiple bursts of a signal received from a cell are sampled with non-uniform spacing between sampling intervals to determine a sequence for cell identification. In a second alternative, samples of a first and a second signal received from a stronger cell are cancelled, and a sequence for detecting a weaker cell is determined by reducing effects of the samples of a third signal received from the weaker cell which do not overlap with the primary synchronization signal (PSS) or SSS of the stronger cell. In a third alternative, a sequence for detecting a weaker cell is determined by reducing effects of any sampled bursts that correspond to a high transmission power portion of a signal from a stronger cell. | 06-12-2014 |
20140169255 | OPTIMIZATION OF EMBMS SERVICE CONTINUITY WITH MBSFN MEASUREMENTS - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus configures a set of MBSFN subframes to include one or more MBSFN subframes for MBSFN signal quality measurements. The one or more MBSFN subframes for MBSFN signal quality measurements correspond to each of one or more MBSFN areas or frequencies for broadcasting eMBMS services. The apparatus sends one or more measurement parameters to a UE. The measurement parameters identify the one or more MBSFN subframes for MBSFN signal quality measurements, and a MBSFN area ID corresponding to each of the one or more MBSFN areas or frequencies. The measurement parameters may further identify a MCS level corresponding to each of the one or more MBSFN areas or frequencies. | 06-19-2014 |
20140241149 | SYSTEMS AND METHODS FOR SYNCHRONIZING WIRELESS COMMUNICATION DEVICE CONFIGURATIONS - An apparatus operable in a communication system is described. The apparatus includes means for sending a connection reconfiguration message using a first configuration. The apparatus also includes means for receiving an acknowledgement message using the first configuration. The apparatus also includes means for applying a second configuration as indicated in the acknowledgement message. The apparatus also includes means for sending a connection reconfiguration complete message uplink grant in a common search space. The apparatus also includes means for receiving a connection reconfiguration complete message using the second configuration. | 08-28-2014 |
20140247766 | SMALL CELL EVOLVED MULTIMEDIA BROADCAST MULTICAST SERVICE - A method by a small cell for wireless communication may include receiving, by the small cell, a wireless Multicast-Broadcast Single Frequency Network (MBSFN) signal from a macro cell, wherein the small cell is characterized by having a transmit power substantially less than each macro cell in a wireless communication network with the small cell. The method may further include obtaining, by the small cell, a measurement value of the MBSFN signal within a radio range of the small cell. The method may further include acting, by the small cell, based on the measurement value. The small cell may be, or may include, at least one of a pico cell, a femto cell, or a home evolved Node B (HeNB). | 09-04-2014 |
20140295907 | INTER-CELL POWER CONTROL IN THE PRESENCE OF FRACTIONAL FREQUENCY REUSE - System(s) and method(s) are provided for inter-cell power control in the presence of fractional frequency reuse in a wireless communication system. Transmission power control of a terminal, and ensuing inter-cell interference mitigation, is accomplished by receiving load indicators from non-serving sectors, decoding those load indicators corresponding to the non-serving sectors that operate in the same frequency bands as the terminal, and adjusting the transmission power according the states of the decoded load indicators in conjunction with the associated non-serving sectors' forward link signal-to-interference-and-noise ratio at the terminal. The states of the load indicators reflect magnitudes of interference metrics with respect to threshold values. Load indicators can also be conveyed by the non-serving sector to a base station serving the terminal through a backhaul communication, and said base station can schedule an adjusted transmission power for the terminal. | 10-02-2014 |
20140301297 | ADAPTIVE ANTENNA MANAGEMENT IN LTE - Certain aspects of the present disclosure relate to methods and apparatus for adaptive antenna management in LTE. Devices and networks capable of transmitting and receiving signals using a variable number of transmitting or receiving antennas using LTE radio access technology are described. | 10-09-2014 |
20140301311 | MULTIPLEXING OF CONTROL AND DATA WITH VARYING POWER OFFSETS IN A SC-FDMA SYSTEM - Systems and methodologies are described that facilitate multiplexing of control information and data for common transmission in a localized FDM wireless communication system. Localized FDM transmission of control and data channels can be achieved by, for example, multiplexing control information with data and transmitting the control information and data using resources and transmission schemes specified for transmission of the data. To ensure the reliability of control information multiplexed with data, a power offset can be applied to the control information to provide varying protection levels for the control information based on properties of the data resources into which it is embedded in order to maintain a predetermined signal quality for the control information independent of the data resources. | 10-09-2014 |
20140334429 | Transmission of Feedback Information for Data Transmission on Multiple Carriers - Techniques for sending feedback information for multi-carrier operation are described. In an aspect, feedback information for data transmissions on multiple downlink carriers may be sent on at least one uplink resource determined based on at least one downlink resource used to send at least one downlink grant for the data transmissions. In another aspect, feedback information for data transmissions on multiple downlink carriers may be sent with reduced or no orthogonal spreading to enable more feedback information to be sent. In yet another aspect, feedback information for data transmissions on multiple downlink carriers may be sent with channel selection. A UE may send a transmission of at least one signal value on at least one resource to convey acknowledgement (ACK) information for data transmissions on multiple downlink carriers. The signal value(s) and resource(s) may be determined based on the content of the ACK information. | 11-13-2014 |
20140355507 | ADJUSTING PRIORITY OF MBMS AND FEMTO CELLS - A UE may camp on a femto cell in an idle mode and determine whether the UE has an interest in receiving an MBMS service from an MBMS cell. When the UE has the interest in receiving the MBMS service, the UE adjusts a priority of the MBMS cell on which the MBMS service is provided or a priority of the femto cell such that the priority of the MBMS cell is higher than the priority of the femto cell. Otherwise, the UE refrains from adjusting the priority of the MBMS cell or the priority of the femto cell. | 12-04-2014 |
20150055541 | LTE BASED MULTICAST IN UNLICENSED SPECTRUM - Methods, systems, and devices are described for broadcast signal transmission using a number of nodes in an unlicensed spectrum. A set of nodes may be identified for use in transmission of a broadcast signal, with a first subset of the nodes transmitting the broadcast signal to deliver first content during a first time period, and with a second subset of the nodes transmitting the broadcast signal to deliver second content during a second time period. The first subset of nodes is different than the second subset of nodes. The set of nodes may thus form a single frequency network (SFN) that performs partial SFN operation during the first and second time periods. | 02-26-2015 |
20150078292 | EXTENDED DURATION CYCLIC PREFIX WITH LOW OVERHEAD FOR LTE BROADCAST - Extended duration cyclic prefixes with lower overhead are disclosed in which an integer multiple sequence of carriers above the nominal 300 carrier-per-25 resource blocks (RBs) definition are selected to reduce the cyclic prefix overhead below the normative 20%. Sets of durations are then provided associated with each such integer multiple sequence of carriers that allow for the combined duration of the symbol duration and extended duration cyclic prefix to result in an integer number of carriers for each RB. | 03-19-2015 |
20150087271 | SECURE RECEPTION REPORTING - In a first configuration, a UE receives, from a service provider, a certificate authority list. The certificate authority list is at least one of integrity protected or encrypted based on a credential known by the UE and the service provider and stored on a smartcard in the UE. The UE authenticates a server using the received certificate authority list. In a second configuration, the UE receives a user service discovery/announcement including a reception report configuration and an address of a server. The UE sends a protected reception report to the server based on the reception report configuration. In a third configuration, the UE receives a protected broadcast announcement and communicates based on the broadcast announcement. The broadcast announcement is at least one of integrity protected or encrypted based on a credential known by the UE and stored on a smartcard in the UE. | 03-26-2015 |