Patent application number | Description | Published |
20080200203 | APPARATUS AND METHOD FOR UPLINK POWER CONTROL OF WIRELESS COMMUNICATIONS - Systems and methodologies are described that facilitate employing periodic closed loop power control corrections in a wireless communication environment. A periodic power control command can be sent over a downlink to control and/or correct an uplink power level employed by an access terminal. Each periodic power control command can be generated based upon an uplink periodic transmission sent from the access terminal. The periodic power control commands can be communicated via a Physical Downlink Control Channel (PDCCH) or in-band signaling. Moreover, access terminals can be grouped to enhance efficiency of downlink transfer of the periodic power control commands. The periodic power control commands can be halted upon access terminal uplink resources being deallocated. For instance, these resources can be deallocated after an inactivity period of the access terminal. Thereafter, the access terminal can initiate random access (e.g., leveraging open loop mechanisms) to resume periodic power control command transmission. | 08-21-2008 |
20080225796 | HANDOVER IN WIRELESS COMMUNICATIONS - Systems and methodologies are described that facilitate handing over mobile device communications in a wireless network from a source base station to a target base station without using a random access channel (RACH). In this regard, the mobile device can monitor multiple base stations determining timing information related thereto and access scheduling request channels for the base stations. When ready for handover, the mobile device can request data resources over the scheduling request channel using the appropriate timing information. | 09-18-2008 |
20080227454 | HANDOVER IN WIRELESS COMMUNICATIONS - Systems and methodologies are described that facilitate handing over mobile device communications in a wireless network from a source base station to a target base station without using a random access channel (RACH). In this regard, the source base station can request shared data bandwidth resources from the target base station on behalf of the mobile device and assign the resources to the mobile device. The mobile device can calculate a timing difference between the source and target base stations and can handover communications by transmitting over the shared data bandwidth using the timing difference to generally provide correct timing for the transmission. To this end, the target base station can have transmission time intervals where it allows transmitting with an extended cyclic prefix to ensure more reliable handover for the mobile device. | 09-18-2008 |
20080233967 | BACKHAUL COMMUNICATION FOR INTERFERENCE MANAGEMENT - System(s) and method(s) are provided for inter-cell interference management in a wireless communication system. A base station perform interference management by conveying and receiving load indicator messages over a backhaul communication link to disparate neighboring base stations that serve interfering mobile stations. Reporting of load indicators takes place according to a reporting policy that is event-based, and accounts for variations of interference metrics over available time-frequency resources. Communication with neighboring base stations is limited to a monitoring interference set, which can be determined statically, according to deployment characteristics of a wireless network, or the set can be adjusted dynamically according to a set of received UL signals or a set of DL CQI measurement reports. Reporting policy and interference set can be autonomously adapted to optimize backhaul traffic as well as interference control. | 09-25-2008 |
20080253326 | SYNCHRONOUS ADAPTIVE HARQ - Synchronous adaptive HARQ is utilized to mitigate resource fragmentation. Bitmaps are utilized instead of scheduling uplink grants for retransmission. The location of one or more resource blocks can be changed if there is a release of resources in a location of a corresponding resource block. Changing the location of the one or more resource blocks can group the resource blocks toward a first end of a spectrum. The bitmap can include a retransmission offset and a signal that indicates a direction with respect to the retransmission offset. The direction can be a positive direction or a negative direction. | 10-16-2008 |
20080316950 | METHODS AND APPARATUSES FOR POWER CONTROL - Downlink power control commands are mapped to resources used for uplink communications within a wireless communication system. An eNode B receives communications from UEs and determines the resources used by the UEs for those transmissions on the uplink which are transmitted at non-optimum power levels. Power control messages are formulated wherein the location of the power control commands is mapped to particular resources used by the UEs for their uplink transmissions. This facilitates the eNode B to dynamically assign resources for the power control commands while permitting the UEs to decode the power control messages to adjust their power accordingly. | 12-25-2008 |
20090003282 | LEARNING-BASED SEMI-PERSISTENT SCHEDULING IN WIRELESS COMMUNICATIONS - Systems and methods are provided for a learning-based determination of semi-persistent scheduling of data-packet flow wireless communication. A packetized data flow served to a wireless terminal is fully scheduled for an initial period of time in order to collect statistics associated with scheduled packet sizes (Ss) and inter-packet times (Ts). Analysis of a cumulative distribution of {S, T} pairs indicate whether a characteristic packet size (S | 01-01-2009 |
20090010224 | CHANNEL DEPENDENT CREDIT ACCUMULATION FOR MOBILE HANDOVER - Channel dependent credit accumulation for determining a mobile handover is provided herein. In some aspects, a characteristic(s) of a source channel(s) serving a mobile device and of one or more target channels can be evaluated. Magnitudes of the evaluated characteristics can be utilized to generate handover credits associated with the target channel(s) (e.g., based on some function of a difference in the magnitudes). If a concurrent number of credits associated with a target channel equals or rises above one or more threshold levels, a mobile device can initiate a handover. As described, disparity in source and target channel quality, signal strength, etc., can be determined to increase probability of a handover based on channel degradation over one or more time intervals. | 01-08-2009 |
20090016252 | EXTENDED MICROSLEEP FOR COMMUNICATIONS - Systems and methodologies are described that facilitate operating an access terminal in an LTE based wireless communication environment utilizing extended microsleep. While in non-DRX mode, an access terminal can operate in on state for a first period of time and in extended microsleep state for a second period of time. Further, the first and second periods of time can form a repeating pattern where these periods of time alternate. Thus, the access terminal can turn on its receiver for the first period of time (e.g., decode downlink information while in on state) and turn off its receiver for the second period of time (e.g., inhibit decoding of downlink information while in extended microsleep state). Further, the first period of time in the repeating pattern can be one TTI (e.g., 1 ms) and the second period of time in the repeating pattern can be a plurality of TTIs (e.g., 5 ms). | 01-15-2009 |
20090028112 | HANDOVER MECHANISM THAT EXPLOITS UPLINK CHANNEL QUALITY OF A TARGET CELL - System(s) and method(s) are provided for handover of a mobile terminal in a wireless communication system. Handoff resolution relies on both a downlink channel quality indication between a serving base station and the mobile terminal,, and uplink channel quality indications amongst the terminal and a measurement set of target base stations. To generate UL channel quality indicators, the mobile station conveys a narrowband or broadband, sounding reference signal, and serving and target base stations measure UL and DL performance metrics (e.g., RSRP, RSSI, or RSOT). In backward handover, UL channel state information from target cells is received at the serving base station through backhaul communication, and handoff is resolved based on both UL and DL quality reports. In forward handover, the set of UL quality reports are conveyed to the mobile station to determine a target cell for handoff. | 01-29-2009 |
20090046573 | FORWARD HANDOVER UNDER RADIO LINK FAILURE - System(s) and method(s) are provided for forward handover under radio link failure. A configurable criterion for radio link failure (RLF) is established through a reference threshold for a channel quality metric; the threshold (CQI | 02-19-2009 |
20090046642 | UPLINK REQUESTS - Systems and methodologies are described that facilitate generating uplink requests that account for bit rates of multiple radio bearers. In particular, one or more radio bearers serviced by a user equipment are assigned priorities. In addition, each radio bearer is assigned a prioritized bit rate and a maximum bit rate. The prioritized bit rates and maximum bit rates of at least one bearer are utilized to determine a high priority queue size and a total queue size. The queue sizes are incorporated into an uplink resource request transmitted to an access point. | 02-19-2009 |
20090122736 | USING DTX AND DRX IN A WIRELESS COMMUNICATION SYSTEM - Systems, methodologies, and devices are described that can facilitate reducing power consumption associated with mobile devices. A mobile device can utilize a sleep mode controller that can facilitate selecting and/or switching to a desired sleep mode based in part on predefined sleep mode criteria. The sleep modes can include a non-sleep mode, light sleep mode, and/or deep sleep mode. The mobile device can employ an analyzer to evaluate information related to explicit signals, implicit signals, and/or the current sleep mode to determine whether a condition is met based in part on the predefined sleep mode criteria such that a transition to a different sleep mode is to be performed. If such a condition is met, the sleep mode controller can facilitate transitioning from the current sleep mode to a different sleep mode to facilitate reducing power consumption by the mobile device. | 05-14-2009 |
20090196275 | UPLINK DELAY BUDGET FEEDBACK - Systems and methodologies are described that facilitate signaling and/or utilizing uplink delay budget related feedback in a wireless communication environment. A lowest delay budget associated with a most urgent Radio Link Control (RLC) service data unit (SDU) retained in a buffer of an access terminal can be determined. Further, a portion of a Medium Access Control (MAC) header (e.g., two reserved bits, . . . ) can be configured to carry a code related to a delay threshold corresponding to the lowest delay budget. Moreover, the MAC header can be transferred to a base station. The base station can detect the code carried by the portion of the MAC header, and a delay threshold can be determined as a function of the detected code (e.g., utilizing a radio bearer specific mapping). According to an example, the access terminal can be scheduled for uplink transmission as a function of the delay threshold. | 08-06-2009 |
20090245194 | DYNAMIC ASSIGNMENT OF ACK RESOURCE IN A WIRELESS COMMUNICATION SYSTEM - Techniques for dynamically assigning acknowledgement (ACK) resource to a user equipment (UE) are described. For dynamic scheduling, a scheduling message may be used to send scheduling information for a single transmission of data. For semi-persistent scheduling, a scheduling message may be used to send a semi-persistent assignment for multiple transmissions of data. In an aspect, at least one field of a scheduling message, which is normally used to carry scheduling information for dynamic scheduling, may be re-used to carry an ACK resource assignment for semi-persistent scheduling. In one design, a UE may receive a scheduling message carrying a semi-persistent assignment and may obtain an assignment of ACK resource from the at least one field of the scheduling message. The UE may receive a transmission of data sent in accordance with the semi-persistent assignment, determine ACK information for the transmission of data, and send the ACK information with the ACK resource. | 10-01-2009 |
20090264077 | METHODS AND APPARATUS FOR UPLINK AND DOWNLINK INTER-CELL INTERFERENCE COORDINATION - A method for inter-cell interference coordination (ICIC) by a home evolved NodeB (HeNB) is described. A portion of bandwidth is reserved for a user equipment (UE). Notification of the reserved portion of bandwidth is sent to at least one potentially interfering evolved NodeB (eNB). A data exchange is performed with the UE using the reserved portion of bandwidth. Notification is sent to the potentially interfering eNBs releasing the reserved portion of bandwidth. | 10-22-2009 |
20090280798 | BSR PROHIBIT TIMER - Systems and methodologies are described that facilitate communicating a Buffer Status Report (BSR) from user equipment (UE) while reducing the employment of a RACH procedure. A BSR Prohibit time interval can be triggered by a receipt of uplink data to the UE. The BSR can be conveyed utilizing an uplink-shared channel (UL-SCH) if a Scheduling Request (SR) or a Semi-Persistent Scheduling (SPS) occurs within the duration of the BSR Prohibit time interval. The BSR can be communicated utilizing a RACH procedure if a SR or SPS occurs upon the expiration of the BSR Prohibit time interval. | 11-12-2009 |
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 |
20100070814 | BUFFER STATUS REPORT TRIGGERS IN WIRELESS COMMUNICATIONS - Systems and methodologies are described that facilitate utilizing timers in conjunction with transmitting buffer status reports (BSR). A prohibit timer can be utilized to determine when BSRs can be transmitted to an eNB. The prohibit timer can be initialized or restarted upon transmitting a BSR to an eNB. A BSR retransmit timer can be used to determine when to retransmit a BSR. The BSR retransmit timer can be initialized upon transmitting a BSR to an eNB and restarted each time an uplink resource allocation is received from the eNB. Once the timer expires, if an uplink transmission buffer contains data (e.g., size>0), the BSR can be retransmitted to the eNB. Control data feedback can additionally be used to determine when to retransmit the BSR. In addition, in either case, the timer duration values can be provided by the eNB. | 03-18-2010 |
20100093386 | Random access for wireless communication - Techniques for sending messages for system access are described. In one aspect, a user equipment (UE) sends a first message with power headroom and/or buffer size information for system access. A Node B determines at least one parameter (e.g., a resource grant, power control information, etc.) based on the power headroom and/or buffer size information. The Node B sends a second message with the parameter(s). The UE sends a third message based on the parameter(s), e.g., with uplink resources indicated by the resource grant, with transmit power determined based on the power control information, etc. In another aspect, the UE sends a radio environment report in the third message. The report may be used to select a cell and/or a frequency for the UE. In yet another aspect, the second message includes power control information, and the UE sends the third message based on the power control information. | 04-15-2010 |
20100323711 | METHODS AND APPARATUS FOR BEAMFORMING FOR FEMTOCELLS - Methods and apparatus for beamforming for femtocells, such as in LTE wireless networks, to provide inter-cell coordination and interference mitigation are disclosed. A macrocell user equipment (UE) may determine information regarding an interfering femtocell node, such as a home eNodeB (HeNB). The information may be sent directly or indirectly, such as by a backhaul communication link, to the HeNB. The HeNB may adjust an output based on the information. The information may include spatial channel information, which may be used for beamforming at the HeNB output so as to mitigate interference in the direction of the UE. | 12-23-2010 |
20110044247 | MAXIMUM POWER SPECTRAL DENSITY REPORTING IN RESPONSE TO OVERLOAD INDICATIONS - Certain aspects of the present disclosure propose methods for reporting information such as a maximum power spectral density to a serving access point after receiving overload indicators from one or more neighboring access points. The reported information may be multiplexed with other information (e.g., Channel Quality Indicator (CQI), Precoding Matrix Index (PMI), rank indication (RI) or acknowledgement (ACK)/negative acknowledgment (NACK) message for downlink data channel) before transmission to the serving access point. In addition, the information may be transmitted in a medium access control (MAC) packet data unit (PDU). | 02-24-2011 |
20110143675 | METHOD AND APPARATUS FOR FACILITATING RADIO LINK MONITORING AND RECOVERY - Methods, apparatuses, and computer program products are disclosed for facilitating a radio link failure determination. A wireless terminal is configured to monitor a control channel quality of a control signal over at least one control carrier. A radio link failure determination is then made based on the control channel quality of the at least one control carrier. In other embodiments, rather than basing the radio link failure determination solely on the set of control carriers, the wireless terminal is configured to monitor a control channel quality over at least one additional carrier, not included in the set of control carriers, in response to a link loss detected over each of the set of control carriers. For such embodiments, the radio link failure determination is then made based on the control channel quality of the additional carrier(s). | 06-16-2011 |
20110149774 | APPARATUS AND METHOD FOR TRANSMIT-RESPONSE TIMING FOR RELAY OPERATION IN WIRELESS COMMUNICATIONS - An apparatus and method for relay operation in a wireless communication system comprising determining a first set of subframes for downlink communication from an eNB to a relay node; determining a second set of subframes for uplink communication from the relay node to the eNB; determining a downlink (DL) hybrid automatic repeat request (HARQ) timing between a first control transmission and a HARQ acknowledge (ACK) message based on a first minimum delay and the first and the second sets of subframes; and determining an uplink (UL) hybrid automatic repeat request (HARQ) timing between a second control transmission and an uplink transmission based on a second minimum delay and the first and the second sets of subframes. | 06-23-2011 |
20110188481 | METHODS AND APPARATUS FOR SUBFRAME INTERLACING IN HETEROGENEOUS NETWORKS - Methods and apparatus for providing wireless communications using subframe partitioning are disclosed. Two or more base stations may be allocated subframes in a radio frame. All or part of the subframe allocation may be provided to the associated user equipment (UEs), which may use it to determine signal metrics during assigned subframes for an associated base station. | 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 |
20110205948 | EXTENDING AN EFFECTIVE CONTROL CHANNEL PERIODICITY VIA DISCONTINUOUS RECEPTION (DRX) - Discontinuous reception (DRX) operation may be utilized to maintain connection with user equipment (UE) by increasing the effective control channel transmission periodicity. UEs may be configured with a compatible control channel transmission periodicity such that multiple UEs may share a resource in a time-division-multiplexed manner using DRX offsets and periodicity, effectively extending control channel transmission periodicity through resource overloading. | 08-25-2011 |
20110216682 | METHOD AND APPARATUS FOR CHANNEL QUALITY INDICATOR (CQI) ENHANCEMENTS - Certain aspects of the present disclosure relate to techniques for reporting of channel quality indication in Long Term Evolution Advanced (LTE-A) wireless systems. | 09-08-2011 |
20110222416 | SYSTEMS AND METHODS FOR OVER THE AIR LOAD INDICATOR FOR WIRELESS SCHEDULING - Systems and methods for facilitating inter-cell interference coordination using load indication are described. A UE may receive load indicator signals from a plurality of base stations in adjacent cells and determine, based at least in part on the load indicator signals, a transmit power metric. The transmit power metric may be provided to a serving base station, which may allocate uplink resources based on the transmit power metric. Additional information related to receiver sensitivity and/or path loss may be used to determine the transmit power metric. | 09-15-2011 |
20110228724 | USER-SPECIFIC SEARCH SPACE DESIGN FOR MULTI-CARRIER OPERATION - Certain aspects of the present disclosure relate to techniques for user-specific search space design for multi-carrier operation in Long Term Evolution Advanced (LTE-A) systems. The user-specific search space can be designed for searching Physical Downlink Control Channels (PDCCHs) transmitted on one component carrier (CC) that schedules Physical Downlink Shared Channel/Physical Uplink Shared Channel (PDSCH/PUSCH) transmissions on two or more different CCs. In one aspect, multiple independent user-specific search spaces can be designed. In another aspect, one user-specific search space can be randomly derived and then expanded to accommodate search for multiple CCs. In yet another aspect, the search space design can retain randomness in starting search element indices of multiple PDSCH/PUSCH CCs, while overlapping of search spaces for multiple PDSCH/PUSCH CCs can be avoided. | 09-22-2011 |
20110250913 | RANDOM ACCESS PROCEDURE ENHANCEMENTS FOR HETEROGENEOUS NETWORKS - Certain aspects of the present disclosure provide various mechanisms that allow a user equipment to convey information regarding one or more attributes to a base station during a random access (RA) procedure. The attributes may include, for example a capability of the UE (e.g., to support a particular feature or version of a standard) or a condition of the UE (e.g., if it is currently experiencing an interference condition). | 10-13-2011 |
20110263286 | METHOD AND APPARATUS FOR CONTENTION-BASED WIRELESS TRANSMISSIONS - Certain aspects of the present disclosure relate to a technique for managing contention-based uplink data transmissions. According to certain aspects, a base station may allocate a common contention-based resource to a plurality of user equipment (UEs). The plurality of UEs may utilize the contention-based resource to transmit uplink data without prior scheduling, which may result in transmission collisions. Certain aspects of the present disclosure provide a mechanism for determining which UE sent an uplink transmissions based on one or more transmission parameter signaled to the UEs. | 10-27-2011 |
20110267991 | HARQ FEEDBACK FOR RELAY SYSTEMS - Certain aspects of the present disclosure provide techniques and apparatuses for acknowledging transmissions in a system utilizing a half-duplex node. According to certain aspects, a half-duplex node may receive, in a plurality of subframes, a plurality of downlink transmissions and send an uplink transmission comprising a plurality of bits indicative of whether the downlink transmissions were successfully received. | 11-03-2011 |
20110268064 | RESOURCE AVAILABILITY FOR PDSCH IN RELAY BACKHAUL TRANSMISSIONS - Certain aspects of the present disclosure provide techniques for indicating (e.g., by a donor base station) resources available for physical downlink shared channel (PDSCH) transmissions from a base station is provided. Certain aspects of the present disclosure provide techniques for determining (e.g., by a relay node or UE) resources available for physical downlink shared channel (PDSCH) transmissions from a base station. | 11-03-2011 |
20110275394 | RESOURCE PARTITIONING INFORMATION FOR ENHANCED INTERFERENCE COORDINATION - Methods and apparatus for partitioning resources for enhanced inter-cell interference coordination (eICIC) are provided. Certain aspects involve broadcasting a message indicating time-domain resource partitioning information (RPI), where a user equipment (UE) may be operating in idle mode. With the RPI, the UE may be able to identify protected resources with reduced/eliminated interference from neighboring cells. The RPI in this broadcasted message may be encoded as a bitmap as an alternative or in addition to enumeration of the U/N/X subframes. Other aspects entail transmitting a dedicated or unicast message indicating the time-domain RPI, where a UE may be operating in connected mode. With the RPI, the UE may be able to determine channel state information (CSI), make radio resource management (RRM) measurements, or perform radio link monitoring (RLM), based on one or more signals from a serving base station during the protected time-domain resources. | 11-10-2011 |
20110280164 | DAI DESIGNS FOR FDD CARRIER AGGREGATION - Certain aspects of the present disclosure relate to techniques for indicating downlink assignments to a user equipment (UE). According to certain aspects, the techniques generally involve generating a downlink assignment index (DAI) indicating a number of assigned downlink transmissions for a user equipment (UE) configured to communicate using multiple component carriers and transmitting a physical downlink control channel (PDCCH) containing the DAI to the user equipment (UE) in a frequency division duplexing (FDD) subframe in which uplink and downlink transmissions may take place at the same time on different carrier frequencies. | 11-17-2011 |
20110282989 | RESOURCE COORDINATION FOR PEER-TO-PEER GROUPS THROUGH DISTRIBUTED NEGOTIATION - Techniques for determining resources to use for peer-to-peer (P2P) communication are disclosed. In an aspect, a network entity may receive feedback information (e.g., resource usage information and/or channel state information) from P2P devices and may perform resource partitioning based on the feedback information to allocate some of the available resources for P2P communication. The allocated resources may observe little or no interference from devices engaged in wide area network (WAN) communication. In another aspect, P2P groups may perform resource negotiation via a WAN connection (e.g., with little or no involvement by the WAN) to assign the allocated resources to different P2P groups. In yet another aspect, a device may autonomously determine whether to communicate with another device directly or via a WAN, e.g., whether to initiate P2P communication with another device and whether to terminate P2P communication. In yet another aspect, a network entity may participate in resource negotiation by P2P devices. | 11-17-2011 |
20110286346 | MEASUREMENT OF RECEIVED POWER AND RECEIVED QUALITY IN A WIRELESS COMMUNICATION NETWORK - Certain aspects of the present disclosure provide techniques and apparatuses for wireless communications. According to certain aspects, a set of protected resources, allocated to a base station of a first cell, that are protected by restricting transmissions of a second cell is determined and received power of a first reference signal from the base station in the set of resources is measured. According to certain aspects, a subset of one or more neighbor base stations that have reduced interference in a set of protected resources is determined and received power measurements for the subset of neighbor cells is excluded when calculating receive signal quality measurements for the subframe. | 11-24-2011 |
20110286391 | QOS-BASED POWER CONTROL IN AGGREGATED CARRIER COMMUNICATION SYSTEMS - A user equipment (UE) is configured for carrier aggregation in a wireless communication system. The UE selects control information to be transmitted in an uplink control channel format in a component carrier of two or more component carriers, where the control information includes information types associated with different information reliability requirements. The UE generates an open-loop power control parameter and/or a closed-loop power control parameter based on the information types. The UE transmits the control information in the uplink control channel format at a power level determined by the open-loop power control parameter and/or the closed-loop power control parameter. | 11-24-2011 |
20110292874 | POWER HEADROOM REPORTING FOR MULTICARRIER LTE SYSTEMS - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus maintains at least one PHR trigger for triggering communication of a PHR for a plurality of component carriers. In addition, the apparatus communicates the PHR for at least one of the component carriers upon the at least one PHR trigger being triggered. The communicated PHR may be an aggregated PHR that includes power headroom information on the PCC and activated SCCs. The communicated PHR may further include an index associating information in the PHR to a corresponding component carrier. The communicated PHR may further include information indicating use of a PUSCH reference for computing the PHR for the at least one of the component carriers on which there is no PUSCH transmission. | 12-01-2011 |
20110310802 | ADAPTIVE RESOURCE PARTITIONING INFORMATION (ARPI) TRANSITION BEHAVIOR IN HETEROGENEOUS NETWORKS - One aspect discloses transition behavior of dynamically changing subframe interlaces and the corresponding behavior of the bases stations during the changing. A method of wireless communication includes receiving a request to dynamically change a subframe interlace. The subframe interlace is transitioned and during the transition either new data transmission is prevented on the prohibited subframe interlace and/or retransmissions are allowed on the prohibited subframe interlace. | 12-22-2011 |
20120009923 | FALLBACK OPERATION FOR CROSS-CARRIER SIGNALING IN MULTI-CARRIER OPERATION - Techniques for supporting fallback operation in a multi-carrier communication system are described. In one aspect, a UE may determine at least one first downlink control information (DCI) format to monitor on a first carrier. The UE may monitor for the first DCI format(s) on the first carrier to detect DCI sent to the UE. The UE may receive a reconfiguration message related to communication on a plurality of carriers by the UE with cross-carrier signaling, and may determine at least one second DCI format to monitor on the first carrier based on the reconfiguration message. The UE may monitor for the first DCI format(s) and the second DCI format(s) on the first carrier after receiving the reconfiguration message. | 01-12-2012 |
20120014268 | MULTIPLEXING AND FEEDBACK SUPPORT FOR WIRELESS COMMUNICATION SYSTEMS - A control scheme using packet headers allows GSM EDGE Radio Access Network (GERAN) systems to increase spectral efficiency through multiplexing techniques, such as superposition coding, multi-user packet transmission, joint detection, and/or joint decoding. A fast feedback scheme for GERAN allows Voice over Internet Protocol (VoIP) frames to be transmitted over GERAN air interfaces without excessive feedback latency. As a result, Hybrid Automatic Repeat-reQuest (H-ARM) acknowledgements may be timely provided for end-to-end VoIP calls that traverse GERAN air interfaces. Additionally, Incremental Redundancy H-ARQ and link quality feedback latencies are decreased. | 01-19-2012 |
20120020286 | CHANNEL PRIORITIZATION AND POWER SCALING IN WIRELESS COMMUNICATIONS - Techniques for adjusting transmission power of one or more channels of a power-limited wireless device are disclosed. A required transmission power can be allocated to one or more control channels, such as a retransmission feedback channel, and a remaining transmission power can be apportioned among other control channels and/or data channels. Transmission power can be allocated among the other control channels and/or data channels according to a reduction from the required transmission power for the channels, according to power coefficients for scaling transmission power allocated to the channels, and the like. | 01-26-2012 |
20120021753 | METHODS AND APPARATUS FOR FACILITATING INTER-CELL INTERFERENCE COORDINATION VIA OVER THE AIR LOAD INDICATOR AND RELATIVE NARROWBAND TRANSMIT POWER - Systems and methods for facilitating inter-cell interference coordination using resource partitioning are described. A UE may receive or determine information related to received interference and/or future scheduling. The information may be communicated to a serving base station, which may use the information to allocate uplink or downlink resources between cells. The uplink and/or downlink resource may be partitioned in subbands to mitigate interference from adjacent network nodes. The eNBs may communicate, such as directly, via a backhaul connection, and/or between UEs to configure interference coordination and signaling. | 01-26-2012 |
20120034926 | COMPUTATION OF CHANNEL STATE FEEDBACK IN SYSTEMS USING COMMON REFERENCE SIGNAL INTERFERENCE CANCELATION - When enabled with common reference signal interference cancellation, a user equipment (UE) may still compute a channel state feedback value with consideration of any canceled interfering neighboring signals. When the neighboring cells are determined to be transmitting data during the time for which the channel state feedback value is being computed, the UE is able to derive the channel state feedback value considering those canceled interfering signals. The UE determines whether each neighboring cell is transmitting during the designated time either by obtaining signals that indicate the transmission schedule of the neighboring cells or by detecting the transmission schedule, such as based on the power class of the neighboring cells. If the UE determines that the neighboring cells are transmitting data during this time period, the UE will compute the channel state feedback value including consideration of the canceled interfering signals. | 02-09-2012 |
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 |
20120044815 | INTERFERENCE COORDINATION FOR PEER-TO-PEER (P2P) COMMUNICATION AND WIDE AREA NETWORK (WAN) COMMUNICATION - Techniques for supporting peer-to-peer (P2P) communication in a wide area network (WAN) are disclosed. In an aspect, interference coordination between P2P devices engaged in P2P communication and WAN devices engaged in WAN communication may be performed based on a network-controlled architecture. For the network-controlled architecture, P2P devices may detect other P2P devices and/or WAN devices and may send measurements (e.g., for pathloss, interference, etc.) for the detected devices to the WAN (e.g., serving base stations). The WAN may perform resource partitioning and/or association for the P2P devices based on the measurements. Association may include selection of P2P communication or WAN communication for a given P2P device. Resource partitioning may include allocation of resources to a group of P2P devices for P2P communication. The WAN may send the results of association and/or resource partitioning to the P2P devices, which may communicate in accordance with the association and/or resource partitioning results. | 02-23-2012 |
20120045014 | RESOURCE BLOCK MAPPING FOR CROSS-CARRIER ASSIGNMENTS - Methods and apparatuses are provided for cross-carrier decoding and mapping of data and control information in a wireless communication system. | 02-23-2012 |
20120046028 | APPARATUS AND METHOD FOR CONTROLLING INTER-CELL INTERFERENCE BETWEEN FEMTOCELLS AND MACROCELLS - An apparatus and method for controlling inter-cell interference comprising detecting and measuring uplink interference; and reporting the level of the uplink interference to an inter cell interference coordination (ICIC) server using a backhaul link. In one example, it may include receiving a measured uplink interference level through a first backhaul link; determining a transmit power level based on the measured uplink interference level; and sending through a second backhaul link the transmit power level for reconfiguring either a user equipment or a femtocell eNodeB. From the downlink perspective, it includes measuring a downlink interference; and reporting the level of the downlink interference to an ICIC server using a backhaul link. In one example, it may include receiving a measured downlink interference through a first backhaul link; determining a transmit power level based on the measured downlink interference; and sending a message comprising the transmit power level to a femtocell eNodeB using a second backhaul link. | 02-23-2012 |
20120058797 | POWER CONTROL ON A DEACTIVATED COMPONENT CARRIER - A wireless communication system implementing Carrier Aggregation (CA) allows activation and deactivation of certain component carriers. Transmit power on an uplink component carrier being reactivated may be controlled by predetermining appropriate power control parameters to be used upon reactivation. The predetermined power control parameters may depend on a last known power control state of the deactivated component carrier or may be reset to apply an initial low power state. | 03-08-2012 |
20120063302 | RANDOM ACCESS DESIGN IN A MULTIPLE COMPONENT CARRIER COMMUNICATION NETWORK - User equipment, systems, apparatuses, methods and/or computer program products are provided to facilitate random access procedures in a wireless communication network. The selection and utilization of uplink and downlink component carriers for conducting contention-free and contention-based random access procedures is facilitated in a multiple component carrier system, where a user equipment is configured with multiple uplink and downlink component carriers. 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. It is therefore to be understood that it should not be used to interpret or limit the scope or the meaning of the claims. | 03-15-2012 |
20120069756 | METHOD AND APPARATUS FOR INTERFERENCE MITIGATION IN WIRELESS NETWORKS - Methods and apparatuses are provided that include mitigating interference for devices communicating with femto nodes or other low power base stations by assigning protected resources for communicating therewith. The protected resources can be negotiated with a macrocell base station using interference cancellation. The protected resources can be assigned based on an early or late handover event, which can indicate that the device may be susceptible to interference from the macrocell base station. | 03-22-2012 |
20120082022 | METHOD AND APPARATUS FOR INFERRING USER EQUIPMENT INTERFERENCE SUPPRESSION CAPABILITY FROM MEASUREMENTS REPORT - UE that are able to cancel interference from CRS, a PDSCH, a PDCCH, or a PCFICH may do so without explicitly signaling the capability to the serving eNB. The serving eNB may transmit to the UE a plurality of cell identifiers to indicate from which cells interference should be canceled. The UE receives CRS, PDSCH, PDCCH, or PCFICH from the serving eNB and cancels CRS, PDSCH, PDCCH, or PCFICH interference, respectively from the signal received from the eNB. The UE cancels the interference from the cells that correspond to the cell identifiers. The UE may then transmit a report to the eNB with a quality measurement without the interference. | 04-05-2012 |
20120082041 | POWER HEADROOM REPORTING - Systems, methods, apparatuses, and computer program products are described for power headroom reporting. A mobile device may identify a transmit power associated with each of a number of independently power controlled channels on one or multiple carriers configured for use by the mobile device. The transmit power may relate to one channel that is an uplink control channel, and one or more additional channels that are uplink shared channels. The identified transmit power of one channel (e.g., the uplink control channel) may be a virtual transmit power, while other identified transmit powers may be measured transmit powers for actual transmissions. The identified transmit powers may be added up, and the power headroom available for the mobile device may be calculated using the accumulated transmit powers. The mobile device may transmit a power headroom report to a base station. | 04-05-2012 |
20120087250 | DETERMINATION OF RADIO LINK FAILURE WITH ENHANCED INTERFERENCE COORDINATION AND CANCELLATION - Existing criteria for analyzing radio link failure conditions may not satisfactorily address the conditions between cells that support cooperative resource coordination. Generally, when the UE declares radio link failure, the UE discontinues communication with a serving base station and searches for a new base station. When the UE lies in a region with severe interference, where the interference is coordinated between base stations by the interfering cell yielding part of its resources, the UE measurements for determining radio link failure (RLF) may vary considerably, depending on whether the measured resources were yielded by the interfering cell. When the UE measures resources which were not yielded by the interfering cell, the UE can erroneously declare RLF (e.g., due to high interference), although the UE can still access the serving cell using resources yielded by the interfering cell. Accordingly, disclosed are aspects for determining RLF based by accounting for cooperative resource coordination employing yielded resources. | 04-12-2012 |
20120087266 | METHOD AND APPARATUS FOR MANAGING INTER-CELL INTERFERENCE COORDINATION ACTIONS FOR TIME-DOMAIN PARTITIONED CELLS - Aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to systems and methods for managing inter-cell interference coordination (ICIC) actions for time-domain partitioned cells. In certain aspects, time-domain partitioning is accounted for by an eNB in determining whether to send frequency-based inter-cell interference information (e.g., uplink overload indicator) to neighboring eNB(s) and/or responsive actions to take in response to receiving frequency-based inter-cell interference information (e.g., uplink overload indicator, high interference indicator, and/or relative narrowband transmission power). | 04-12-2012 |
20120088516 | HETEROGENEOUS NETWORK (HETNET) USER EQUIPMENT (UE) RADIO RESOURCE MANAGEMENT (RRM) MEASUREMENTS - Methods and apparatus for performing radio resource management (RRM) measurements in a heterogeneous network (HetNet) are provided in an effort to prevent failure of RRM measurement procedures in a dominant interference scenario. Several alternatives are provided for determining particular resources (e.g., subframes) to use for performing the RRM measurements, wherein the particular resources are based on cooperative resource partitioning between cells of the HetNet, wherein the cells may be of different types (e.g., macro, pico, or femto cells). These alternatives include, for example: (1) intra-frequency or intra-RAT (radio access technology) alternatives, which may involve transmitting resource partitioning information (RPI) in or deriving non-serving cell RPI based on the serving cell's RPI, as well as (2) inter-frequency or inter-RAT alternatives, where the RRM measurements may be performed during a measurement gap. | 04-12-2012 |
20120093010 | EVOLVED NODE B CHANNEL QUALITY INDICATOR (CQI) PROCESSING FOR HETEROGENEOUS NETWORKS - Methods and apparatus for processing channel quality information (CQI) and scheduling resources subject to cooperative resource allocation based on the CQI are provided. To convey the CQI for protected/unprotected subframes in a single report, a new vector CQI format may be utilized. Two alternatives for CQI processing this vector format and the advantages of each are described. In the first alternative, a single entry from the CQI vector is selected for processing by a downlink scheduler and/or other media access control (MAC) blocks (e.g., a PHICH, DCI power control, and/or PDCCH scheduler). In the second alternative, the selection from the CQI vector is made on a per-subframe basis, and both the subframe and the selected CQI element are processed by the downlink scheduler and/or the other MAC blocks. In this manner, better scheduling decisions may be made using the CQI vector. | 04-19-2012 |
20120093095 | METHOD AND APPARATUS FOR SUPPORTING COMMUNICATIONS IN A HETEROGENEOUS NETWORK - A method, an apparatus, and a computer program product for wireless communication are provided in which an apparatus may determine broadcast channel scheduling information for one or more broadcasts of a payload by a broadcast channel associated with a first base station based on one or more broadcast channel interference coordination schemes, wherein reception of the broadcast channel associated with the first base station is interfered at least in part based on one or more transmissions from a second base station, and receive the payload based on the determined broadcast channel scheduling information. | 04-19-2012 |
20120093096 | SEMI-PERSISTENT SCHEDULING GRANTS IN HETEROGENEOUS NETWORKS - Time division multiplexing (TDM) partitioning is one of the inter-cell interference coordination (ICIC) mechanisms considered for a heterogeneous network (HetNet) ICIC in a co-channel deployment. For example, in subframes that are pre-allocated to an evolved Node B (eNB), neighbor eNBs may not transmit, hence interference experienced by served user equipments (UEs) may be reduced. Semi-persistent scheduling (SPS) grants may have various available periodicities, which may not be compatible with TDM partitioning. Therefore, a UE may miss an SPS opportunity that was scheduled for a subframe that was not usable by the UE. Hence, using SPS grants with small periodicities in a heterogeneous network with TDM partitioning may require changes which may include adjusting the periodicities of the SPS grants, rescheduling of uplink SPS messages based on resource partitioning information (RPI), and/or determining RPI based on current SPS grants. | 04-19-2012 |
20120099489 | SYSTEMS, APPARATUS AND METHODS FOR FACILITATING FREQUENCY REUSE FOR DOWNLINK CONTROL CHANNELS - Systems and methods for frequency reuse on downlink control channels (DLCCs) are provided. One method can include determining a first number of symbols to support transmission of control information on a DLCC, and configuring a second number of symbols for transmission of the control information on the DLCC, wherein the second number of symbols is greater than the first number of symbols. The method can also include assigning a number of DLCCs based on the second number of symbols, and transmitting control information over an assigned number of DLCCs to achieve an effective reuse factor less than one. Another method can include identifying fractions of bandwidth in a system having cells, and allocating at least one of the cells to at least one of the fractions of bandwidth in a system. Resource element groups allocated to the fractions of bandwidth can be coordinated across cells to provide frequency reuse. | 04-26-2012 |
20120106372 | METHOD AND APPARATUS FOR COMMUNICATION WITH SHORTENED SIGNAL FORMATS - Techniques for addressing high interference observed by a receiver in a wireless communication system are disclosed. The receiver may observe different interference power levels across a transmission symbol. In an aspect, the receiver applies different weights to different portions of the transmission symbol to account for fluctuation of interference power across the transmission symbol. In another aspect, a transmitter may send a transmission symbol such that a receiver can ignore a portion of a symbol period with high interference. In one design, the transmitter generates a transmission symbol including at least two copies of a signal component. The transmitter transmits at least one copy of the signal component in a portion of the symbol period in which the receiver does not observe high interference. The receiver processes the at least one copy of the signal component to recover data sent in the transmission symbol. | 05-03-2012 |
20120106373 | METHOD AND APPARATUS FOR SOUNDING ANTENNAS IN WIRELESS COMMUNICATION - Methods and apparatuses are provided that facilitate sounding antennas in wireless communication. In an aspect, a method for wireless communication includes determining at least one resource reserved for transmitting a demodulation reference signal and transmitting a sounding reference signal over the at least one resource. In another aspect, a method of wireless communication includes signaling a parameter related to sounding multiple antenna ports, receiving signals from a device over the multiple antenna ports, and estimating a channel related to the signals at least in part by removing a precoding from the signals. | 05-03-2012 |
20120108239 | METHOD AND APPARATUS FOR MEASURING CELLS IN THE PRESENCE OF INTERFERENCE - Methods and apparatuses are provided that include determining measurement values for base stations based on signal measurements obtained over resources protected from interference by neighboring cells. The protected resources can be determined based on at least one of detecting at least a bimodal disparity in signal measurements received over the resources, receiving an indication of the protected resources, determining the resources as used for transmitting paging signals, determining the resources from a previous resource assignment, and/or the like. Thus, where a device is measuring cells for idle-mode reselection, such measurement of protected resources can provide for a more accurate measurement of characteristics of signals received from the base station. | 05-03-2012 |
20120120924 | SYSTEM, APPARATUS AND METHOD FOR DOWNLINK AND UPLINK GRANT DESIGN IN WIRELESS COMMUNICATION SYSTEMS - In accordance with aspects of the disclosure, a method, apparatus, and computer program product are provided for wireless communication. The method, apparatus, and computer program product may be configured to provide at least one control channel for downlink grant information, provide at least one other control channel for uplink grant information, and adjust time apportioned for the downlink and uplink grant information in the control channels. | 05-17-2012 |
20120134273 | REFERENCE SIGNAL PATTERNS - Certain aspects of the present disclosure provide techniques for allocating resources for use in transmitting reference signals (RSs). According to certain aspects, a large set of enumerated possible CSI-RS resources (“CSI-RS patterns”) may be defined and a base station may select a CSI-RS pattern from a subset of the available patterns, with the subset determined by a transmission configuration. | 05-31-2012 |
20120207105 | COOPERATION AND OPERATION OF MACRO NODE AND REMOTE RADIO HEAD DEPLOYMENTS IN HETEROGENEOUS NETWORKS - A method, an apparatus, and a computer program product for wireless communication are provided for separating control transmissions and data transmissions within the coverage area of a plurality of transmission/reception points or points that are geographically displaced, the plurality of points comprising a macro node and a plurality of remote radio heads (RRHs) coupled to the macro node. Separating control transmissions and data transmissions in the macro node/RRH configuration may allow UEs to be associated with one set of transmission points for data transmissions and the same set or a different set of transmission points for common control signaling. Separating control transmissions and data transmissions may also allow for faster reconfiguration of antenna ports used for UE data transmission compared with reconfiguration via a handover process. | 08-16-2012 |
20120275322 | METHOD AND APPARATUS FOR RESTRICTED MEASURING IN A WIRELESS NETWORK - Methods and apparatuses are provided that include determining resources over which to measure signals from a base station. One or more parameters related to a resource restriction pattern can be provided to the device for measuring signals over indicated resources. The resource restricted pattern can correspond to a bitmap where each bit relates to a time period over which signals can be transmitted by the base station, and the bit can specify whether a signal received over the resource should be measured. The resource restriction pattern can correspond to a set or protected resources negotiated using a resource partitioning scheme. | 11-01-2012 |
20130016649 | SYSTEM DESIGN FOR USER EQUIPMENT RELAYS - Certain aspects of the present disclosure provide methods and apparatus related to various considerations for using systems comprising user equipment (UE) relays. One method generally includes receiving, at a UE functioning as a relay, data from a first apparatus; and relaying the received data to a second apparatus, wherein the relaying does not involve interpreting or altering security features of the received data. | 01-17-2013 |
20130016692 | DOWNLINK CONTROL WITH CONTROL-LESS SUBFRAMES - In a wireless communications system wherein control-less subframes share a common carrier with subframes that include control signaling, a method performed by a base station may include receiving a first indication from a network entity to maintain a designated set of subframes on a common carrier devoid of designated downlink control signals. The method may further include providing a second indication in a wireless transmission to a mobile entity, the second indication enabling identification of subframes in the designated set (i.e., the control-less subframes) by the mobile entity. In turn, identification of control-less subframes by the mobile entity prior to decoding the subframes may enable a more efficient control of blind decoding operations at the mobile entity and reduce blind decoding operations required for the mobile entity to decode downlink control information. | 01-17-2013 |
20130016701 | METHOD AND APPARATUS FOR RANDOM ACCESS IN AN ORTHOGONAL MULTIPLE-ACCESS COMMUNICATION SYSTEM - Techniques for accessing a wireless communication system are described. A user equipment (UE) sends a random access preamble for system access. The random access preamble may include a random identifier (ID), a channel quality indicator (CQI), etc. The UE may randomly select the random ID or may be assigned this random ID. The UE receives a random access response from a base station. The random access response may include control channel resources (e.g., CQI and PC resources), uplink resources, and/or control information (e.g., timing advance and PC correction) for the UE. The random access response may be sent in two parts using two messages. A first message may be sent on a control channel and may include identification information and possibly other information. A second message may be sent on a shared data channel and may include remaining information for the random access response. | 01-17-2013 |
20130107823 | METHOD AND APPARATUS FOR CONFIGURING TRAFFIC-TO-PILOT POWER RATIOS IN HETEROGENEOUS NETWORKS | 05-02-2013 |
20130114565 | STRUCTURE OF ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL (e-PDCCH) IN LONG TERM EVOLUTION (LTE) - Aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to defining a structure of and enhanced physical downlink control channel (e-PDCCH). Certain aspects provide methods and apparatus for determining a search space in which a base station (eNodeB) may transmit an enhanced physical downlink control channel (e-PDCCH), wherein the search space comprises one or more fractional portions of frequency-time resources of a physical resource block (PRB) pair, and attempting to decode the e-PDCCH based on the determined search space. | 05-09-2013 |
20130148558 | LOW POWER NODE DORMANT STATE - The state of an access link and backhaul link of a low power node may be determined and controlled after a low power node is initialized. The overhead signaling on the access link of a relay is controlled based on detecting a user equipment (UE). The connection on the backhaul link of the relay is managed in response to the overhead signaling on the access link. | 06-13-2013 |
20130163529 | METHODS AND APPARATUS FOR ASSIGNMENT DEPENDENT DOWNLINK CHANNEL PROCESSING FOR WIRELESS NETWORKS - Aspects of the present disclosure relates generally to communication systems, and more particularly, to apparatus and techniques for handling, within resources of an assigned channel, different availability of interference. Aspects generally include determining different portions of resources for an assigned downlink channel that are subject to at least one of different levels or different types of interference, and selecting different techniques for processing the different portions of the resources, wherein each technique is selected based on the corresponding level or type of interference. In aspects, a fixed pattern or amount of interference for the resources may be selected based on the different levels or the different types of interference and a technique for processing the resources is selected, wherein the technique is selected based on the selected fixed pattern or amount of interference. | 06-27-2013 |
20130182688 | METHOD AND APPARATUS FOR PERFORMING RANDOM ACCESS ON A SECONDARY CARRIER - Methods and apparatus are described herein for synchronizing timing when using a secondary component carrier (SCC) in a carrier aggregated wireless network. A user equipment (UE) may determine that it is out of synchronization with respect to an SCC used to communicate with a network element. The UE may inform the network element of the out of synchronization status, and may perform a random access procedure to synchronize the timing. | 07-18-2013 |
20130194948 | METHODS FOR INDICATING BACKHAUL RELAY GEOMETRY - A backhaul quality is measured. One or more subsets of cell identifiers having a mapped backhaul quality that maps to the measured backhaul quality are identified. The one or more subsets have a set of cell identifiers associated therewith. A network is queried to indicate one or more cell identifiers in the identified subset of cell identifiers available for a user equipment (UE) relay. One of the one or more indicated cell identifiers is selected. If more than one subset of cell identifiers has a mapped backhaul quality that maps to the measured backhaul quality, first and second subsets having respective first and second mapped backhaul qualities are selected and the backhaul qualities are compared relative to a backhaul quality threshold. The mapped backhaul quality that most satisfies the backhaul quality threshold is identified for the network query. | 08-01-2013 |
20130201917 | DYNAMIC INDICATION OF TRAFFIC TO PILOT (T/P) RATIOS - An method of wireless communication dynamically indicates traffic to pilot ratio (T/P) values in heterogeneous networks. Subframes are categorized into groups that do not overlap. A traffic to pilot ratio (T/P) indicator is received and the a T/P value for a group of subframes is determined based at least in part on the received T/P indicator. | 08-08-2013 |
20130223324 | APPARATUS AND METHOD FOR OPPORTUNISTIC RELAY ASSOCIATION - A method, an apparatus, and a computer program product for associating a user equipment (UE) with a relay in a wireless network are provided. The apparatus determines a relay backhaul link quality of a relay; determines a path loss from a UE to the relay; and compares the relay backhaul link quality to a direct link quality between the UE and a base station, and the path loss to a path loss threshold to determine whether to associate the UE with the relay. | 08-29-2013 |
20130265896 | PROCEDURES TO ACTIVATE OPPORTUNISTIC RELAYS - Aspects of the present disclosure relate to techniques for activating opportunistic relays. A combination of uplink and downlink pilots may be used to switch on user equipment relays (UeNBs) in an effort to make more accurate measurements in an effort to enable handovers. According to aspects of the present disclosure, a relay may evaluate one or more channel conditions, determine whether or not to transmit downlink reference signals to a UE based on the evaluation, and transmit downlink reference signals to the UE based on the determination. According to aspects, a relay may determine a set of resources reserved for transmission of uplink pilots by UEs, monitor the set of resources to detect transmission of uplink pilots, and report, to an eNB, a power at which the uplink pilots were received. | 10-10-2013 |
20130272187 | COMMUNICATION IN A HETEROGENEOUS NETWORK WITH CARRIER AGGREGATION - A communication environment with carrier aggregation (CA) is disclosed in which a UE is configured for communication at a first time with a first network node via a primary component carrier (PCC) and a second network node via a secondary CC (SCC). At a second time, the UE is configured for communication with a third network node via the SCC at a second time. The UE maintains communication with the first network node via the PCC without triggering handover at the UE during the establishing communication with the third network node. | 10-17-2013 |
20130279430 | SMALL CELL ACTIVATION PROCEDURE - A method of wireless communication includes receiving activation parameters at a low power node and detecting a proximity of an active user equipment (UE) based at least in part on the activation parameters. The activation parameters are triggered from a node different from the low power node, such as an eNodeB. The low power node initiates an activation sequence after detecting the active UE. | 10-24-2013 |
20130281076 | SMALL CELL ACTIVATION PROCEDURE - A method of wireless communication includes configuring a small cell with activation parameters. The activation parameters include a new carrier type having a reduced periodicity. The method also includes configuring a UE with time restricted measurements. The time restricted measurements correspond to the new carrier type and the reduced periodicity. The method further includes receiving small cell signal measurements from the UE and initiating an activation sequence in response to the small cell signal measurements. | 10-24-2013 |
20130286848 | METHOD AND APPARATUS FOR SIGNALING IN DENSE NETWORK OPERATIONS - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus transitions to a dormant state and transmits a very low duty cycle signal (LDCS) while in the dormant state. The apparatus may transmit an LDCS configuration to a second entity, the second entity being one of an LPN that is not in a dormant state and a macro cell. The apparatus may further monitor for a RACH messages at a predetermined RACH delay after transmitting the LDCS. The apparatus may transition to a DRX/DTX mode. The DRX/DTX mode may be matched to at least one connected UE. | 10-31-2013 |
20130286912 | METHOD AND APPARATUS FOR SIGNALING IN DENSE NETWORK OPERATIONS - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus identifies a UE relay and transmits a very low duty cycle signal (LDCS) configuration of the UE relay. The apparatus may comprise, e.g., an LPN that is not in a dormant state or a macrocell. The apparatus may receive LDCS information for the UE relay. The apparatus may determine the LDCS configuration and transmit the LDCS configuration to the UE relay. | 10-31-2013 |
20130286928 | METHOD AND APPARATUS FOR SIGNALING IN DENSE NETWORK OPERATIONS - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives an LDCS configuration for a UE relay from a second entity and monitors for an LDCS from the UE relay based on the received LDCS configuration. The second entity may comprise one of an LPN that is not in a dormant state and a Macro cell. The apparatus may receive LDCS configurations for a plurality of LPNs and monitor for a plurality of LPNs based on the received LDCS configurations. When the apparatus determines a need to connect to a LPN, the apparatus may select an LPN among the plurality of LPNs. | 10-31-2013 |
20130286965 | SIGNAL DESIGNS FOR DENSELY DEPLOYED NETWORK - Aspects of the present disclosure relate to techniques that may be utilized in networks with relatively dense deployments of nodes, such as remote radio heads (RRHs) and UE relays. | 10-31-2013 |
20130308520 | BATTERY POWER REPORTING FOR UE RELAYS - A method of wireless communication manages the reporting of battery power for UE relays. A UE capable of serving as a UE relay receives a battery status report configuration. The battery status may be based on rate of power consumption, percentage of total battery power remaining, characteristics of particular battery type, and/or allocation of battery usage. The UE may transmit a battery status report to a base station. | 11-21-2013 |
20140016537 | ASSOCIATING TERMINAL USER EQUIPMENT WITH USER EQUIPMENT RELAYS - An operational characteristic of a relay is determined. The relay is a user equipment (UE) serving as an eNB. The operational characteristic includes one or more of a quality of a relay backhaul and a capacity of the relay backhaul. The relay backhaul includes a communications link between the relay and an eNB. A determination of whether to perform a handover of a UE is made based on the operational characteristic of the relay and a corresponding operational characteristic of the eNB. | 01-16-2014 |
20140036806 | METHODS AND APPARATUS FOR COORDINATED MULTIPOINT (CoMP) COMMUNICATIONS - Certain aspects of the present disclosure relate to methods and apparatus for Coordinated Multipoint (CoMP) communications. Certain aspects relate to methods and apparatus for determining resource mapping and/or rate matching for CoMP operations. | 02-06-2014 |
20140036812 | COMMUNICATING WITH AN ENHANCED NEW CARRIER TYPE - A method of wireless communication is presented for an enhanced new carrier type cell. The method includes transmitting downlink common signals and channels at a low duty cycle while in a dormant state. The method also includes transmitting downlink common signals and channels at a high duty cycle while in an active state. | 02-06-2014 |
20140044040 | METHOD AND APPARATUS FOR INDICATING ACTIVE CHANNEL STATE INFORMATION REFERENCE SIGNAL (CSI-RS) CONFIGURATIONS - Techniques for indicating active channel state information reference signal (CSI-RS) configurations for a user equipment (UE) are disclosed. The UE may be configured with multiple CSI-RS configurations and may receive signaling indicating which of its CSI-RS configurations are active. Improved performance may be obtained by dynamically signaling the active CSI-RS configurations. In one example, the UE may receive first signaling (e.g., upper-layer signaling) indicating a plurality of CSI-RS configurations configured for the UE. The UE may receive second signaling (e.g., lower-layer signaling) indicating at least one active CSI-RS configuration for the UE. The active CSI-RS configuration(s) may include all or a subset of the plurality of CSI-RS configurations. The UE may perform at least one communication task based on the at least one active CSI-RS configuration for the UE. The communication task(s) may include de-rate matching, CSI reporting, cell set management, etc. | 02-13-2014 |
20140080538 | METHODS AND APPARATUSES FOR POWER CONTROL IN WIRELESS COMMUNICATIONS - Downlink power control commands are mapped to resources used for uplink communications within a wireless communication system. A base station receives communications from UEs and determines the resources used by the UEs for those transmissions on the uplink which are transmitted at non-optimum power levels. Power control messages are formulated wherein the location of the power control commands is mapped to particular resources used by the UEs for their uplink transmissions. This facilitates the base station to dynamically assign resources for the power control commands while permitting the UEs to decode the power control messages to adjust their power accordingly. | 03-20-2014 |
20140119320 | RANDOM ACCESS PROCEDURE ENHANCEMENTS FOR HETEROGENEOUS NETWORKS - Certain aspects of the present disclosure provide various mechanisms that allow a user equipment to convey information regarding one or more attributes to a base station during a random access (RA) procedure. The attributes may include, for example a capability of the UE (e.g., to support a particular feature or version of a standard) or a condition of the UE (e.g., if it is currently experiencing an interference condition). | 05-01-2014 |
20140133443 | METHOD AND APPARATUS FOR RANDOM ACCESS IN AN ORTHOGONAL MULTIPLE-ACCESS COMMUNICATION SYSTEM - Techniques for accessing a wireless communication system are described. A user equipment (UE) sends a random access preamble for system access. The random access preamble may include a random identifier (ID), a channel quality indicator (CQI), etc. The UE may randomly select the random ID or may be assigned this random ID. The UE receives a random access response from a base station. The random access response may include control channel resources (e.g., CQI and PC resources), uplink resources, and/or control information (e.g., timing advance and PC correction) for the UE. The random access response may be sent in two parts using two messages. A first message may be sent on a control channel and may include identification information and possibly other information. A second message may be sent on a shared data channel and may include remaining information for the random access response. | 05-15-2014 |
20140153379 | CHANNELIZING PACKET ACKNOWLEDGMENTS FOR MULTIPLE DATA CHANNELS IN WIRELESS COMMUNICATION - Acknowledgments for packets received on multiple data channels in wireless communication are channelized with multiple orthogonal codes to generate multiple symbol sequences. Modulation symbols for an acknowledgment channel are generated based on the symbol sequences. | 06-05-2014 |
20140153548 | SENDING FULL CHANNEL QUALITY INDICATION REPORTS ON TDM CHANNEL IN WIRELESS COMMUNICATION - Multiple full channel quality indication (CQI) reports indicative of received signal quality for multiple carriers in wireless communication are transmitted in multiple time intervals of a CQI channel. | 06-05-2014 |
20140153549 | REVERSE LINK PILOT WITH SELECTIVE GATING IN WIRELESS COMMUNICATION - A data channel is received on a forward link in wireless communication, during operation in a mode that permits transmission of a gated pilot. The gated pilot is transmitted on a reverse link if no other transmissions are being sent on the reverse link. Otherwise, a full pilot is transmitted on the reverse link. | 06-05-2014 |
20140204851 | ENHANCED PHYSICAL BROADCAST CHANNEL FOR NEW CARRIER TYPE IN LONG TERM EVOLUTION - Aspects of the present disclosure provide techniques and apparatus for enhanced physical broadcast channel (PBCH) for new carrier type (NCT) in long term evolution (LTE). According to certain aspects, a method for wireless communications by a base station (BS) is provided. The method generally includes generating an enhanced physical broadcast channel (EPBCH) using a frequency division multiplexed (FDM) structure, wherein the EPBCH spans substantially a subframe duration and transmitting the EPBCH. | 07-24-2014 |
20140204889 | SYSTEMS AND METHODS FOR ENHANCING UPLINK COVERAGE IN INTERFERENCE SCENARIOS - A method and apparatus are for communication in a wireless network in which a User Equipment (UE) associated with a first evolved Node B (eNB) experiences interference from a second eNB. The method includes negotiating by the first eNB of the wireless network with a second eNB of the wireless network for a partitioning of subband resources on an uplink. A first subset of subband resources is assigned to the first eNB, and a second subset of subband resources is assigned to the second eNB. A method and apparatus are for communication in a wireless network. The method includes decoding a downlink control channel received during a protected downlink subframe to determine an uplink subframe n containing a protected subband for uplink transmission. The method also includes transmitting data during the uplink subframe n on the protected subband. | 07-24-2014 |
20140233530 | METHODS AND APPARATUS FOR ACCESSING DORMANT CELLS - A method, a computer program product, and an apparatus are provided. The apparatus may be a UE. The UE receives an information block from a first base station while camped on a second base station. In an aspect, the information block includes an indication of a random access configuration for performing at least a part of a random access procedure. The UE determines to reselect to the first base station from the second base station. The UE performs at least a part of a random access procedure with the first base station based on the indicated random access configuration to reselect from a second base station to the first base station. | 08-21-2014 |
20140235243 | ACTIVATION PROCEDURE FOR DORMANT CELLS - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a UE. The UE receives synchronization signals and an information block from a first base station. The information block includes information indicating whether the first base station is in a dormant state or an active state. The UE detects the first base station based on the received synchronization signals and on the information indicating whether the first base station is in the dormant state or the active state. The UE may receive, from a second base station, an indication of resources for detecting the first base station. The synchronization signals and the information block may be received in the indicated resources. The UE may move to the first base station from a second base station in a handoff from the second base station to the first base station. | 08-21-2014 |
20140241294 | Method and apparatus for communication with shortened signal formats - Techniques for addressing high interference observed by a receiver in a wireless communication system are disclosed. The receiver may observe different interference power levels across a transmission symbol. In an aspect, the receiver applies different weights to different portions of the transmission symbol to account for fluctuation of interference power across the transmission symbol. In another aspect, a transmitter may send a transmission symbol such that a receiver can ignore a portion of a symbol period with high interference. In one design, the transmitter generates a transmission symbol including at least two copies of a signal component. The transmitter transmits at least one copy of the signal component in a portion of the symbol period in which the receiver does not observe high interference. The receiver processes the at least one copy of the signal component to recover data sent in the transmission symbol. | 08-28-2014 |
20140247790 | SYSTEMS AND METHODS FOR ENHANCING UPLINK COVERAGE IN INTERFERENCE SCENARIOS - A method and apparatus are for communication in a wireless network in which a User Equipment (UE) associated with a first evolved Node B (eNB) experiences interference from a second eNB. The method includes negotiating by the first eNB of the wireless network with a second eNB of the wireless network for a partitioning of subband resources on an uplink. A first subset of subband resources is assigned to the first eNB, and a second subset of subband resources is assigned to the second eNB. A method and apparatus are for communication in a wireless network. The method includes decoding a downlink control channel received during a protected downlink subframe to determine an uplink subframe n containing a protected subband for uplink transmission. The method also includes transmitting data during the uplink subframe n on the protected subband. | 09-04-2014 |
20140269479 | MULTIPLEXING AND FEEDBACK SUPPORT FOR WIRELESS COMMUNICATION SYSTEMS - A control scheme using packet headers allows GSM EDGE Radio Access Network (GERAN) systems to increase spectral efficiency through multiplexing techniques, such as superposition coding, multi-user packet transmission, joint detection, and/or joint decoding. A fast feedback scheme for GERAN allows Voice over Internet Protocol (VoIP) frames to be transmitted over GERAN air interfaces without excessive feedback latency. As a result, Hybrid Automatic Repeat-reQuest (H-ARQ) acknowledgements may be timely provided for end-to-end VoIP calls that traverse GERAN air interfaces. Additionally, Incremental Redundancy H-ARQ and link quality feedback latencies are decreased. | 09-18-2014 |
20140301298 | METHODS AND APPARATUS FOR TRANSMISSION RESTRICTION AND EFFICIENT SIGNALING - Certain aspects of the present disclosure relate to methods and apparatus for transmission restriction and efficient signaling. A base station (BS) may determine information regarding a restricted set of system parameters used for transmission from at least one of the serving BS or one or more potentially interfering BSs and signal the information to a user equipment (UE). According to certain aspects, a UE may receive the signaling of information regarding the restricted set of system parameters used for transmission from at least one of the serving BS or the one or more potentially interfering BSs and use the information to cancel interference by transmissions from the one or more potentially interfering BSs or serving BS. | 10-09-2014 |
20140307714 | METHOD AND APPARATUS FOR INTERFERENCE MITIGATION IN WIRELESS NETWORKS - Methods and apparatuses are provided that include mitigating interference for devices communicating with femto nodes or other low power base stations by assigning protected resources for communicating therewith. The protected resources can be negotiated with a macrocell base station using interference cancellation. The protected resources can be assigned based on an early or late handover event, which can indicate that the device may be susceptible to interference from the macrocell base station. | 10-16-2014 |
20140314007 | PDSCH TRANSMISSION SCHEMES WITH COMPACT DOWNLINK CONTROL INFORMATION (DCI) FORMAT IN NEW CARRIER TYPE (NCT) IN LTE - Certain aspects of the present disclosure relate to physical downlink shared channel (PDSCH) transmission schemes with compact downlink control information (DCI) format in new carrier type (NCT) in long term evolution (LTE). | 10-23-2014 |
20140321370 | RATE MATCHING UNDER IRREGULAR, SPARSE, OR NARROWBAND SIGNALS - Aspects of the present disclosure relate to techniques that may be utilized to perform rate matching in networks which utilize sparsely or irregularly transmitted signals/channels. | 10-30-2014 |
20140334397 | ENHANCED PDSCH OPERATION - An enhanced data transmission operation is disclosed in which PDSCH and/or EPDCCH may be transmitted in the first symbol either with or without legacy control information multiplexed with the data transmissions. Base stations operating according to the various aspects may transmit indicators to related mobile devices that identify when such PDSCH/EPDCCH are transmitted in the first symbol period. UEs receive the multiplexed data transmissions and decode the appropriate PDSCH/EPDCCH transmissions along with any multiplexed legacy control information. | 11-13-2014 |
20140334399 | METHODS AND APPARATUS FOR NETWORK SYNCHRONIZATION - Certain aspects relate to techniques and apparatus for network synchronization by network listening. Aspects include transmitting a synchronization signal for a base station (BS) to use for acquiring synchronization with the network. Aspects include listening for a synchronization signal from a BS to use for acquiring network synchronization. In aspects, a method for wireless communications by a BS is provided. The method generally includes acquiring synchronization with a network based on a first synchronization signal transmitted from a primary BS or a secondary BS, determining a synchronization stratum for the BS based on whether the BS acquired synchronization with the network from the primary BS or from the secondary BS, and transmitting a second synchronization signal for one or more other BS s to use for acquiring synchronization with the network, wherein the transmitting is based, at least in part on the determined synchronization stratum. | 11-13-2014 |
20140341018 | TECHNIQUES FOR SELECTING SUBFRAME TYPE OR FOR INTERLEAVING SIGNALS FOR WIRELESS COMMUNICATIONS OVER UNLICENSED SPECTRUM - Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes comparing past transmission activity on an unlicensed spectrum to an activity threshold, transmitting a first subframe type in the unlicensed spectrum during a next active transmission when the past transmission activity is greater than the activity threshold, and transmitting a second subframe type in the unlicensed spectrum during a next active transmission when the past transmission activity is lesser than the activity threshold, the second subframe type comprising a more robust subframe type than the first subframe type. A second method includes generating one or both of PUCCH signals and PUSCH signals based on interleaved signals that increase nominal bandwidth occupancy in an unlicensed spectrum, and transmitting the generated signals in the unlicensed spectrum. A third method includes receiving the PUCCH signals and the PUSCH signals. | 11-20-2014 |
20140341024 | CONCURRENT WIRELESS COMMUNICATIONS OVER LICENSED AND UNLICENSED SPECTRUM - Methods and apparatuses are described for wireless communications. A first method includes transmitting a first Orthogonal Frequency-Division Multiple Access (OFDMA) communications signal to a wireless node in a licensed spectrum, and transmitting, concurrently with the transmission of the first OFDMA communications signal, a second OFDMA communications signal to the wireless node in an unlicensed spectrum. A second method includes receiving a first Orthogonal Frequency-Division Multiple Access (OFDMA) communications signal from a wireless node in a licensed spectrum, and receiving, concurrently with the reception of the first OFDMA communications signal, a second OFDMA communication signal from the wireless node in an unlicensed spectrum. A third method includes generating a periodic gating interval for a cellular downlink in an unlicensed spectrum, and synchronizing at least one boundary of the periodic gating interval with at least one boundary of a periodic frame structure associated with a primary component carrier of the cellular downlink. | 11-20-2014 |
20140341035 | BEACON TRANSMISSION OVER UNLICENSED SPECTRUM - Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes broadcasting beacon signals in an unlicensed spectrum at predetermined times from an evolved Node B (eNB). A second method includes receiving beacon signals broadcast in an unlicensed spectrum at predetermined times from an eNB. The beacon signals may include downlink signals identifying the eNB and at least one associated attribute of the eNB. | 11-20-2014 |
20140341053 | WIRELESS FEEDBACK COMMUNICATIONS OVER UNLICENSED SPECTRUM - Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes receiving feedback information from a user equipment (UE) via a primary component carrier (PCC) uplink in a licensed spectrum. A second method includes transmitting feedback information from a UE to an evolved Node B (eNB) via a PCC uplink in a licensed spectrum. The feedback information may address signals transmitted to the UE via a downlink in an unlicensed spectrum | 11-20-2014 |
20140341135 | COLLISION AVOIDANCE SCHEME FOR WIRELESS COMMUNICATIONS OVER UNLICENSED SPECTRUM - Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes performing clear channel assessment (CCA) to determine availability of an unlicensed spectrum, transmitting a request-to-send (RTS) signal to a set of user equipments (UEs) using the unlicensed spectrum when a determination is made that the unlicensed spectrum is available, and receiving, in the unlicensed spectrum, a common clear-to-send (CTS) signal and an individual CTS signal from one or more of the UEs in response to the RTS signal. A second method includes transmitting an RTS signal in an unlicensed spectrum or a V-RTS signal in a licensed spectrum, addressed to a set of UEs, and transmitting a CTS-to-self signal in the unlicensed spectrum along with the transmission of the V-RTS signal. | 11-20-2014 |
20140341207 | LISTEN-BEFORE-TALK RESERVATION SCHEME FOR WIRELESS COMMUNICATIONS OVER UNLICENSED SPECTRUM - Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes synchronizing clear channel assessment (CCA) slots across a plurality of base stations to determine availability of an unlicensed spectrum for transmissions in a next transmission interval. A second method includes performing a CCA during one of a plurality of CCA slots synchronized across a plurality of evolved Node Bs (eNBs) to determine availability of unlicensed spectrum for transmissions in a next transmission interval. | 11-20-2014 |
20140342729 | Methods and apparatus for beamforming for femtocells - Methods and apparatus for beamforming for femtocells, such as in LTE wireless networks, to provide inter-cell coordination and interference mitigation are disclosed. A macrocell user equipment (UE) may determine information regarding an interfering femtocell node, such as a home eNodeB (HeNB). The information may be sent directly or indirectly, such as by a backhaul communication link, to the HeNB. The HeNB may adjust an output based on the information. The information may include spatial channel information, which may be used for beamforming at the HeNB output so as to mitigate interference in the direction of the UE. | 11-20-2014 |
20140342745 | GATING SCHEME FOR WIRELESS COMMUNICATION OVER UNLICENSED SPECTRUM - Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. One method includes performing a clear channel assessment (CCA) for an unlicensed spectrum in a current gating interval to determine whether the unlicensed spectrum is available for a transmission in a next transmission interval, and gating OFF the transmission in the unlicensed spectrum for the next transmission interval when the determination is that the unlicensed spectrum is unavailable. | 11-20-2014 |
20140348019 | CQI Estimation in a Wireless Communication Network - Techniques for estimating and reporting channel quality indicator (CQI) are disclosed. Neighboring base stations may cause strong interference to one another and may be allocated different resources, e.g., different subframes. A UE may observe different levels of interference on different resources. In an aspect, the UE may determine a CQI for resources allocated to a base station and having reduced or no interference from at least one interfering base station. In another aspect, the UE may determine multiple CQI for resources of different types and associated with different interference levels. For example, the UE may determine a first CQI based on at least one first subframe allocated to the base station and having reduced or no interference from the interfering base station(s). The UE may determine a second CQI based on at least one second subframe allocated to the interfering base station(s). | 11-27-2014 |
20150029877 | DISCOVERY SIGNALS FOR LTE - Aspects of the present disclosure relate to techniques that may be utilized in networks with relatively dense deployments of small cells and/or various other types of cells, each of which may or may not support a dormancy cell operation. | 01-29-2015 |
20150031382 | PAGING A USER EQUIPMENT OVER UNLICENSED SPECTRUM - Methods and apparatus for paging comprise receiving data destined for a UE. The methods and apparatus further comprise determining a short identity for the UE relative to a longer global user equipment identity and identifying a MIB transmission based on a short identity. Moreover, the methods and apparatus comprise activating a bit within a slot of the MIB transmission to indicate that the user equipment listen for a page in order to receive the data and broadcasting the MIB. In other aspects, methods and apparatus for receiving a page comprise entering an idle state while camped on a cell. The methods and apparatus further comprise waking up from the idle state to monitor a slot of a MIB for a paging indication. Moreover, the methods and apparatus comprise recognizing the paging indication in the monitored slot of the MIB, determining a paging window based on correlation information in a SIB and waking up to listen for a page during the paging window. | 01-29-2015 |
20150049708 | HARQ DESIGN FOR LTE IN UNLICENSED SPECTRUM UTILIZING INDIVIDUAL ACK/NACK - Methods, systems, and apparatuses are described for wireless communications. In one method, a sequence number corresponding to a data frame and one or more data subframes of the data frame may be transmitted over an unlicensed spectrum to a user equipment (UE), and hybrid automatic repeat request (HARQ) feedback for the one or more data subframes may be received over the unlicensed spectrum, from the UE, when the sequence number corresponding to the data frame is received by the UE in a specified order. In another method, a sequence number corresponding to a data frame and HARQ feedback may be transmitted over an unlicensed spectrum to a UE, and one or more data subframes may be received over the unlicensed spectrum, from the UE, in response to the HARQ feedback when the sequence number corresponding to the data frame is received by the UE in a specified order. | 02-19-2015 |
20150049709 | GROUP ACK/NACK FOR LTE IN UNLICENSED SPECTRUM - Methods, systems, devices, and apparatuses are described for wireless communications. In one method, a set of one or more data subframes of a data frame may be transmitted over an unlicensed spectrum, to a user equipment (UE), during a transmission period. A group hybrid automatic repeat request (HARQ) feedback message for a plurality of data subframes including at least one of the data subframes in the set of one or more data subframes may then be received over the unlicensed spectrum, from the UE, during the transmission period. In another method, a set of one or more data subframes of a data frame may be received over an unlicensed spectrum during a transmission period. A group HARQ feedback message for a plurality of data subframes including at least one of the data subframes in the set of one or more data subframes may then be transmitted over the unlicensed spectrum during the transmission period. | 02-19-2015 |
20150049712 | Uplink Procedures For LTE/LTE-A Communication Systems With Unlicensed Spectrum - Long term evolution (LTE)/LTE-Advanced (LTE-A) deployments with unlicensed spectrum leverage more efficient LTE communication aspects over unlicensed spectrum, such as over WIFI radio access technology. In order to accommodate such communications, various uplink procedures may be modified in order to handle communications between licensed and unlicensed spectrum with LTE/LTE-A deployments with unlicensed spectrum. | 02-19-2015 |
20150049741 | Downlink Procedures For LTE/LTE-A Communication Systems With Unlicensed Spectrum - Long term evolution (LTE)/LTE-Advanced (LTE-A) deployments with unlicensed spectrum leverage more efficient LTE communication aspects over unlicensed spectrum, such as over WIFI radio access technology. In order to accommodate such communications, various downlink procedures may be modified in order to handle communications between licensed and unlicensed spectrum with LTE/LTE-A deployments with unlicensed spectrum. | 02-19-2015 |
20150067435 | RESOURCE MAPPING TO HANDLE BURSTY INTERFERENCE - Resource mapping and coding schemes to handle bursty interference are disclosed that provide for spreading the modulated symbols for one or more transmission code words over more symbols in the time-frequency transmission stream. Certain aspects allow for the modulated symbols to be based on bits from more than one code word. Other aspects also provide for re-mapping code word transmission sequences for re-transmissions based on the number of re-transmissions requested by the receiver. Additional aspects provide for layered coding that uses a lower fixed-size constellation to encode/decode transmissions in a layered manner in order to achieve a larger-size constellation encoding. The layered encoding process allows the transmitter and receiver to use different coding rates for each coding layer. The layered encoding process also allows interference from neighboring cells to be canceled without knowledge of the actual constellation used to code the interfering neighboring signal. | 03-05-2015 |
20150071060 | COUPLING UPLINK AND DOWNLINK CCA IN LTE-U - Methods, systems, and devices are described contention-based channel access procedures that may enhance efficiency in communications using unlicensed spectrum. A time period may be identified during which base stations perform contention-based downlink channel access procedures for access to a channel in an unlicensed spectrum. The base stations may be coordinated such that different base stations may seek channel access during different time intervals during the time period. Contention-based uplink channel access procedures for UEs may then be modified to favor one or more UEs that are associated with a base station that has won channel access. | 03-12-2015 |
20150085797 | LTE-U UPLINK WAVEFORM AND VARIABLE MULTI-SUBFRAME SCHEDULING - Uplink waveforms for operating long term evolution (LTE) in an unlicensed band (i.e., long term evolution-unlicensed (LTE-U) communication) are disclosed. Carrier aggregation (CA) and standalone (SA) are disclosed. LTE on the licensed channel may provide both control and data, LTE on the unlicensed channel may provide data. Managing variable transmission time interval (TTI) continuous transmission is disclosed for transmission over multiple subframes of an unlicensed carrier in LTE-U. Listen-before-talk (LBT) requirements of unlicensed carriers provide for additional channel occupancy constraints when scheduling resources for multiple UEs for variable TTI continuous uplink transmissions over multiple subframes. A joint control channel is disclosed that provides control information for all of the potentially available subframes to be scheduled for the uplink transmissions. In addition to management of the variable TTI continuous transmissions, adjustments to uplink signal parameters are also disclosed that address the constraints due to the LBT requirements of unlicensed carriers. | 03-26-2015 |