Patent application number | Description | Published |
20100039947 | RELAYS IN WIRELESS COMMUNICATION NETWORKS - Methods and apparatus for transmitting packets in wireless communication networks are disclosed. The methods include a relay mobile station measuring channel quality between the relay mobile station and a destination mobile station in response to a request for relay mobile stations from a base station The relay mobile station reports a channel quality indicator to the base station if the channel quality for a link between the base station and the destination mobile station via the relay mobile station is greater than a predetermined channel quality. The base station determines the relay mobile station that provides an optimal route for transmitting the packets from the base station to the destination mobile station. | 02-18-2010 |
20100054114 | MIMO beamforming method and method of constructing a differential codebook for a wireless network - A MIMO beamforming method comprises receiving at a base station information regarding a difference between an ideal beamforming matrix and an averaged beamforming direction, using the information to construct a beamforming matrix at the base station, and performing a beamforming operation using the reconstructed beamforming matrix. Alternatively, the method comprises computing at a subscriber station an averaged beamforming direction, computing at the subscriber station a quantization index corresponding to a differential matrix in a differential codebook, and transmitting the quantization index across a wireless channel of the wireless network. The differential codebook may be constructed by identifying a codebook center and transforming a predefined codebook that is stored in a memory of a component of the wireless network. | 03-04-2010 |
20100056216 | Techniques utilizing adaptive codebooks for beamforming in wireless networks - An embodiment of the present invention provides a method, comprising using an adaptive codebook for beamforming for communications in wireless networks. | 03-04-2010 |
20100172318 | Handling Hybrid Automatic Repeat Requests in Wireless Systems - A mobile station may implement an uplink hybrid automatic repeat request acknowledgement channel. The mobile station may use frequency hopping to randomize inter cell interference. The mobile unit may use time division multiplexing, frequency division multiplexing, and/or code division multiplexing. | 07-08-2010 |
20100172432 | METHOD AND APPARATUS USING A BASE CODEBOOK STRUCTURE FOR BEAMFORMING - Techniques for a precoding scheme for wireless communications are described. A method and apparatus may comprise a first device for a communications system to determine a beamforming structure for a closed loop transmit beamforming scheme using channel information, one or more scaling factors and one or more integers to represent a complex vector. The beamforming structure may include a codeword, a codebook and a codeword index. Other embodiments are described and claimed. | 07-08-2010 |
20100189068 | DOWNLINK TRANSMIT BEAMFORMING - A wireless network access point can operate as a closed loop MIMO device when communicating with a station that is operating as an open loop MIMO device. Transmit/receive chains in the access point are calibrated to support aggregate channel reciprocity. | 07-29-2010 |
20100220610 | MAC SLOT ALIGNMENT AMONG MULTIPLE WIRELESS STATIONS - A device in a wireless network receives signals and determines media access control (MAC) slot boundaries of the received signals. The MAC slot boundaries are averaged in time, and a local slot boundary is modified in response thereto. The local MAC slot boundary is modified by less than ten percent of a short interframe space until the local MAC slot boundary is within one orthogonal frequency division multiplexing (OFDM) cyclic prefix duration of the averaged MAC slot boundaries. | 09-02-2010 |
20100226357 | Differential codebook for a wireless network, MIMO beamforming system using same, and method of reducing a quantization error in a MIMO beamforming system for a wireless network using same - A differential codebook for a wireless network includes a plurality of codewords and [e | 09-09-2010 |
20100227565 | TRANSMISSION OF CHANNEL QUALITY DATA IN WIRELESS COMMUNICATION SYSTEMS - Briefly, in accordance with one or more embodiments, data transmitted from a transmitter is received in a downlink channel, and channel quality data is fed back to the transmitter in a first uplink channel or in a second uplink channel. Channel quality data is feedback at a lower rate on the first uplink channel and channel quality data is feedback at a higher rate on the second uplink channel in the event there is a higher amount of data to be fed back. Link adaptation may be utilized to select a transmission rate on the second uplink channel, wherein the transmission rate is selected based at least in part on a channel condition or a user location. | 09-09-2010 |
20100290352 | Apparatus and methods for multi-radio coordination of heterogeneous wireless networks - Embodiments of systems and methods for multi-radio coordination of heterogeneous wireless networks are generally described herein. Other embodiments may be described and claimed. | 11-18-2010 |
20100329131 | WIRELESS DEVICE AND METHODS FOR OPPORTUNISTIC SCHEDULING IN A CONTENTION-BASED WIRELESS NETWORK - Embodiments of a wireless device and method for channel access are generally described herein. In some embodiments, the wireless device is configured to measure channel quality and set a backoff delay for channel access based on the channel quality. Shorter backoff delays are set for better channel quality and longer backoff delays are set for poorer channel quality. | 12-30-2010 |
20100329316 | Techniques for transmission of channel quality data in wireless systems - An embodiment of the present invention provides an apparatus, including a transceiver adapted for use in a wireless network using a fast feedback channel design that incorporates a 2-two level adaptive fast feedback channel framework separating uplink (UL) fast feedback channels into primary and secondary UL fast feedback channels. | 12-30-2010 |
20110002263 | BEAMFORMING USING BASE AND DIFFERENTIAL CODEBOOKS - Embodiments of methods and apparatus for determining and/or quantizing a beamforming matrix are disclosed. In some embodiments, the determining and/or quantizing of the beamforming matrix may include the use of a base codebook and a differential codebook. Additional variants and embodiments are also disclosed. | 01-06-2011 |
20110009076 | PROVIDING CQI FEEDBACK WITH COMMON CODE RATE TO A TRANSMITTER STATION - Methods and apparatuses for providing CQI feedback with common code rate to a transmitter station are described herein. In one implementation, the methods may include a receiver station that is communicatively linked to a transmitter station via k spatial channels transmitting a first CQI to the transmitter station that indicates a modulation level for use by the transmitter station to transmit (i.e., to configure for transmission) a first of k streams of signals to be transmitted to the receiver station. The first CQI may further include a common code rate to be used by the transmitter station for transmitting the first of the k streams of signals as well as for transmitting the rest of the k−1 additional streams of signals to the receiver station. The receiver station may further transmit to the transmitter station k−1 additional CQIs to indicate to the transmitter station the k−1 modulation levels to be used by the transmitter station for transmitting the k−1 additional streams of signals to the receiver station. | 01-13-2011 |
20110013603 | Techniques for MIMO beamforming for frequency selective channels in wireless communication systems - An embodiment of the present invention provides an apparatus that may include a transceiver operable as a base station (BS) in a wireless network and adapted for multiple input multiple output (MIMO) beamforming and further adapted for wireless communication with a receiver that feeds back to the transceiver a plurality of beamforming matrixes per subband and interpolates the beamforming matrixes across the subband. | 01-20-2011 |
20110058522 | METHOD AND APPARATUS FOR TRANSMITTING AN ACK/NACK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - Machine-readable media, methods, apparatus and system for transmitting ACK/NACK signal in a wireless communication system are described. In some embodiments, a sequence corresponding to one of acknowledge (ACK) information and non-acknowledge (NACK) information may be determined. Then, the sequence may be mapped onto a transmission channel for later transmission from the mobile station to a base station. In some embodiments, the transmission channel may be allocated with at least a part of three feedback mini-tiles (FMTs), wherein each of the FMTs comprises two subcarriers contiguous in frequency domain by six orthogonal frequency division multiplexing (OFDM) symbols contiguous in time domain and the three FMTs being discontinuous in frequency domain. | 03-10-2011 |
20110064158 | DIFFERENTIAL FEEDBACK SCHEME FOR CLOSED-LOOP MIMO BEAMFORMING - A first N×M codebook of a first rank M may be used to generate a second N×(N−M) codebook of a second rank (N−M). This second codebook is both orthogonal and complementary to the first codebook. In practice, this may reduce storage requirements in closed-loop MIMO beamforming, because the second codebook may be dynamically generated as needed by a base station and/or a mobile station. In some cases, a higher rank beamforming matrix or precoding matrix may be formed from a lower rank (e.g., one or two) beamforming matrix or precoding matrix. Also, a novel way to generate the rotation matrix Q | 03-17-2011 |
20110075619 | Apparatus and method for transmitting fast feedback data in wireless systems - Embodiments of the present invention may help facilitate improved performance for high throughput, mobile wireless networks, e.g., IEEE 802.16m, mobile implementations for 3GPP Long Term Evolution (LTE) including LTE advanced mobile phone networks, and other types of high bandwidth networks. In some embodiments, provided are orthogonal sequences with desirable correlation properties for, e.g., 4-6 bits of information, among other things, typically achieving improved performance at varied vehicle speeds. In some embodiments, correlation distances for 6 bits may be less than 3.86, for 5 bits may be less than 3.12, and for 4 bits may be less than 1.95. Additionally, in some embodiments, dedicated coding for PFBCH information may be provided to achieve improved performance for most (if not all) information bits at a relatively wide range of vehicle speeds. Different code sequences for different tiles in one PFBCH channel may be applied for same messages to overcome error floors in high speed scenarios. | 03-31-2011 |
20110075650 | POLAR CAP RESET METHOD FOR DIFFERENTIAL CODEBOOK FOR WIRELESS COMMUNICATIONS - Techniques for periodically resetting the polar cap for a differential codebook precoding scheme for wireless communications are described. An apparatus may comprise a fixed device for a mobile broadband communications system utilizing an orthogonal frequency-division multiple access technique, the fixed device having a precoding module operative to generate a precoding matrix using a received first codeword of a first base codebook, subsequently reconstruct the precoding matrix using a received polar-cap codeword of a polar-cap codebook, and periodically reset the precoding matrix to clear accumulated error at the fixed device using a received second codeword of a second base codebook. Other embodiments are described and claimed. | 03-31-2011 |
20110087944 | Retransmission techniques in wireless networks - Retransmission techniques are disclosed. These techniques may be used in networks employing contention-based access schemes, such as CSMA. For instance, a device may receive a corrupted packet from a transmitting device, and determine a cause of the corruption. When the determined cause of the corruption is an in-network packet collision, the device allows the transmitting device to send a retransmission of the packet in accordance with a contention-based access scheme. However, when the determined cause of the corruption is other than an in-network packet collision, the device provides retransmission assistance to the transmitting device. This retransmission assistance may include a channel reservation for a retransmission, and/or one or more link adaptation suggestions for the transmitting device. | 04-14-2011 |
20110150113 | Distortion-Aware multiple input multiple output precoding - Precoding parameters used for precoding of a source are selected to minimize distortion that would otherwise be induced in the source during encoding and transmission of the source over a multiple input multiple output (MIMO) channel. | 06-23-2011 |
20110158218 | Techniques utilizing step size adaptation for differential beamforming in wireless networks - An embodiment of the present invention provides a method used in transmit beam forming, comprising, providing differential feedback by using variable differential codebooks across a plurality of feedbacks wherein the differential codebooks may have different shapes, and/or spans, and/or the numbers of codewords across feedbacks. | 06-30-2011 |
20110158337 | OFDM TRANSMITTER AND METHODS FOR REDUCING THE EFFECTS OF SEVERE INTERFERENCE WITH SYMBOL LOADING - Embodiments of an OFDM transmitter and method of reducing the effects of interference on subcarriers in an OFDM system by symbol loading are disclosed herein. A linear transformation is performed on a group of two or more input data symbols that are mapped to different signal dimensions to generate a corresponding two or more output data symbols. Each of the output data symbols has an increased number of constellation points. Each output data symbol is configured for transmission within one of the different signal dimensions. The linear transformation is configured so that each of the two or more output data symbols carry the information of each of the input data symbols of the group. This coding together of input data symbols that are mapped to different signal dimensions may provide improved reliability against fading and severe interference. The different signal dimensions may comprise a frequency, a time and/or a space dimension. | 06-30-2011 |
20110216722 | CONTENTION-BASED TRANSMISSION WITH CONTENTION-FREE FEEDBACK FOR REDUCING LATENCY IN LTE ADVANCED NETWORKS AND ENHANCED PUCCH - Methods for contention-based transmission with contention-free feedback for reduced latency in LTE Advanced networks and an enhanced PUCCH are generally disclosed herein. User equipment (UE) may transmit a contention sequence on a physical uplink control channel (PUCCH) to an enhanced-Node B (eNB) and may concurrently transmit data requesting uplink resources on a physical uplink shared channel (PUSCH) to the eNB. The contention sequence is transmitted on the PUCCH in accordance with a format that is assigned by the eNB. The contention sequence is either randomly selected by the UE or assigned by the eNB. When the contention sequence and data are not successfully received by the eNB, the UE may fall back to a more conventional random access channel (RACH) procedure for uplink resource allocation. | 09-08-2011 |
20110249655 | TECHNIQUES USING DIFFERENTIAL PRECODING FOR HIGHLY CORRELATED CHANNELS IN WIRELESS NETWORKS - An embodiment of the present invention provides a method of using differential precoding for highly correlated channels in a wireless network, comprising, using a differential codebook optimized for highly correlated antennas. | 10-13-2011 |
20110261760 | SIGNAL RECEPTION APPARATUS, SYSTEMS, AND METHODS - An apparatus and a system, as well as a method and article, may operate to separate, in the frequency domain, a combined plurality of asynchronous data streams received at substantially the same time into a separated plurality of data streams, converting to the time domain for detection, synchronizing, and decoding. | 10-27-2011 |
20110268102 | TECHNIQUES FOR FORMATTING SIGNALS FOR TRANSMISSION USING A WIRELESS NETWORK - Techniques are described for forming signals for transmission to a receiver. Two transmitters can form resource blocks with different Physical Uplink Control Channel (PUCCH) demodulation reference signal (DMRS) patterns that are orthogonal over time and/or frequency to each other. The transmitters can simultaneously transmit the same resource block but with different DMRS patterns. If a receiver is mounted with two antennas, the receiver can utilize a MIMO receiver to differentiate resource blocks from two transmitters. | 11-03-2011 |
20110269493 | Control channel interference mitigation - In some embodiments, control channel data is passed between neighboring base stations to allocate control channel resources to mitigate inter-cell interference. | 11-03-2011 |
20110280174 | METHOD AND DEVICE FOR IMPLICIT RELAY - Embodiments of a method and apparatus for implicit relay of communication between a base station and a subscriber station within a wireless network are described. Some embodiments may reduce co-channel interference at the subscriber station and some embodiments may allow the base station to reduce its transmission power. Other embodiments may be described and claimed. | 11-17-2011 |
20120002569 | Swarm intelligence based methods to enable cooperative communication in a mesh network - A method and device are described for determining at a node in a mesh network, cooperation with other nodes in forwarding messages and packets in a mesh network. | 01-05-2012 |
20120026991 | FEEDBACK SCHEME FOR MU-MIMO - Embodiments of a system and method for managing feedback in a MU-MIMO system. An access point can announce one or more of mobile stations that are to receive downlink information in a first frame. The access point can also send a sounding package to the one or more mobile stations and receive feedback from the one or more mobile stations according to the feedback schedule. The feedback may be based on the reception of the sounding package. | 02-02-2012 |
20120028671 | POWER LOADING IN MU-MIMO - Embodiments of a system and method for transmitting data from an access point in a multiple user multiple input multiple output (MU-MIMO) system are provided. A first indication of signal quality (ISQ) is received at the access point from a first station and a second ISQ is received from a second station. The access point sets a first power level and a first modulation and coding scheme (MCS) for transmission of a first aggregated media access control (MAC) protocol data unit (A-MPDU) to the first station as a function of the first ISQ and an amount of payload data corresponding to the first A-MPDU. The access point also sets a second power level and a second MCS for transmission of a second A-MPDU as a function of the second ISQ and an amount of payload data corresponding to the second A-MPDU. | 02-02-2012 |
20120045003 | COMMUNICATION STATION AND METHOD FOR EFFICIENTLY PROVIDING CHANNEL FEEDBACK FOR MIMO COMMUNICATIONS - Embodiments of a communication station and methods for efficiently providing channel feedback for MIMO communications over an OFDM channel are generally described herein. In some embodiments, receiving stations may perform a recursive differential quantization of channel information across time and/or frequency to generate quantized differential channel feedback. The quantized differential channel feedback from each receiving station may be used by a transmitting station to precode MIMO transmissions to one or more of the receiving stations. The quantized differential channel feedback may be either a quantized differential channel matrix or a quantized differential beamforming matrix. | 02-23-2012 |
20120063442 | TECHNIQUES FOR QUICK ACCESS CHANNEL INFORMATION LOADING IN WIRELESS NETWORKS - An embodiment of the present invention provides a method of quick access channel information loading in wireless networks, comprising mapping at least one quick access channel to one distributed resource unit of control tiles, said control tiles being spread across consecutive sub-carriers and consecutive OFDMA symbols, wherein each control tile and a predetermined number of sub carriers are used to send a bandwidth indicator and a predetermined number of sub carriers are used to send a bandwidth request message, and wherein there exist unique orthogonal sequences for the bandwidth indicator and each of the sequences are capable of being selected as a preamble sequence. | 03-15-2012 |
20120071192 | DEVICE, SYSTEM, AND METHOD OF ADJUSTING CHANNEL UTILIZATION FOR WIRELESS TRANSMISSION - Device, system, and method of adjusting channel utilization for wireless transmission. For example, a wireless communication unit may control a wireless transmission by a wireless communication device during a contention period, wherein the wireless communication unit is to wait for a back-off period prior to beginning the wireless transmission during the contention period, and wherein a duration of the back-off period is based on a transmission power of the wireless transmission. Other embodiments are described and claimed. | 03-22-2012 |
20120082190 | PMI FEEDBACK WITH CODEBOOK INTERPOLATION - Various embodiments of this disclosure may describe apparatuses, methods, and systems for interpolation of precoding matrixes to increase feedback accuracy of the channel state information (CSI) feedback in a wireless communication network. Other embodiments may also be disclosed or claimed. | 04-05-2012 |
20120113830 | ENHANCED NODE B AND METHOD FOR PRECODING WITH REDUCED QUANTIZATION ERROR - Embodiments of an enhanced Node B (eNB) and method for precoding with reduced quantization error are generally described herein. In some embodiments, first and second precoding-matrix indicator (PMI) reports may be received on an uplink channel and a single subband precoder matrix may be interpolated from precoding matrices indicated by both the PMI reports. Symbols for multiple-input multiple output (MIMO) beamforming may be precoded using the interpolated precoder matrix computed for single subband for a multiple user (MU)-MIMO downlink orthogonal frequency division multiple access (OFDMA) transmission. In some embodiments, each of the first and second PMI reports includes a PMI associated with a same subband that jointly describes a recommended precoder. | 05-10-2012 |
20120140647 | Communications Techniques For Bursty Noise Environments - Techniques are disclosed that involve communicating in bursty noise environments. For instance, a source device may send a probing packet to a destination device. This probing packet is for determining whether the communications medium (e.g., one or more frequency channels) is currently exhibiting a busy or jammed (e.g., due to bursty noise) condition. More particularly, based on whether an acknowledgment of the probing packet is received, the source device determines whether the channel is jammed (or busy) or clear. For example, an unacknowledged probing packet indicates that the channel is jammed or busy, while an acknowledged probing packet indicates that the channel is clear. If the channel is determined to be clear, then the source device may transmit one or more data packets to the destination device. Such data packet transmissions may be in accordance with a non rate-adaptive technique. | 06-07-2012 |
20120155315 | DOWNLINK TRANSMIT BEAMFORMING - A wireless network access point can operate as a closed loop MIMO device when communicating with a station that is operating as an open loop MIMO device. Transmit/receive chains in the access point are calibrated to support aggregate channel reciprocity. | 06-21-2012 |
20120163181 | Enabling Coexistence of High-Density and Low-Density Transmissions - Embodiments may comprise logic such as hardware and/or code to enable coexistence of high-density and low-density transmissions with a modified CSMA protocol. Embodiments include a self-CTS (self clear to send) packet transmission prior to transmission of a ready to send (RTS) signal when initiating a high density transmission amidst legacy devices. In many embodiments, the self-CTS or the RTS includes a network allocation vector (NAV) having a value for the duration of the transmission. In some embodiments, the self-CTS may include a flag or bit to indicate the Shading Transmission Starts (STS). | 06-28-2012 |
20120163291 | Physical uplink control channel Interference Mitigation in heterogenous networks - In some embodiments, a wireless device comprises a baseband processor, a control module coupled to the signal processor and comprising logic to map a first set and at least one redundant set of physical uplink control channel (PUCCH) blocks into a subframe structure, wherein the at least one redundant set of PUCCH blocks is embedded in an interior section of the subframe, an RF modulator/demodulator coupled to the baseband processor to modulate/demodulate the PUCCH blocks for communication within a predetermined frequency range, and a transmitter to transmit the PUCCH blocks. Other embodiments may be described. | 06-28-2012 |
20120176965 | CQI DEFINITION FOR TRANSMISSION MODE 9 IN LTE-ADVANCED - An evolved Node B (eNB) in a 3GPP LTE-based network receives Channel State Information-Reference Signal (CSI-RS) from a User Equipment (UE) that is configured with Precoder Matrix Indictor (PMI) disabled. A channel is estimated between the eNB and the UE for link adaptation in Transmission Mode 9 (TM9) based on CSI-RS by the UE and SRS by the eNB. CQI is calculated at UE such that if a number of CSI-RS antenna ports equals one, TM9 transmission from the eNB to the UE uses a predetermined single antenna port. If the number of CSI-RS antenna ports equals two, TM9 transmission from the eNB to the UE uses transmit diversity. If the number of CSI-RS antenna ports does not equal one or two, TM9 transmission from the eNB to the UE uses spatial multiplexing based on a rank-1 precoder that is determined from a wideband channel covariance matrix R. | 07-12-2012 |
20120188900 | MIMO BEAMFORMING METHOD AND METHOD OF CONSTRUCTING A DIFFERENTIAL CODEBOOK FOR A WIRELESS NETWORK - A MIMO beamforming method comprises receiving at a base station information regarding a difference between an ideal beamforming matrix and an averaged beamforming direction, using the information to construct a beamforming matrix at the base station, and performing a beamforming operation using the reconstructed beamforming matrix. Alternatively, the method comprises computing at a subscriber station an averaged beamforming direction, computing at the subscriber station a quantization index corresponding to a differential matrix in a differential codebook, and transmitting the quantization index across a wireless channel of the wireless network. The differential codebook may be constructed by identifying a codebook center and transforming a predefined codebook that is stored in a memory of a component of the wireless network. | 07-26-2012 |
20120250539 | TECHNIQUES TO DETERMINE USER PRESENCE - An embodiment of the present invention provides a method of detecting user presence, comprising registering a client associated with the user on a host associated with the user and setting up a wireless communication pairing, wherein while setting up the pairing, the client measures the host wireless communication power and uses it as calibration threshold for distance detection, and wherein the client measures a beacon power of the host radio and when the beacon power is above a threshold, the client is determined to be proximate to the host. | 10-04-2012 |
20120252470 | DISTRIBUTED ADAPTIVE RESOURCE ALLOCATION TO ENHANCE CELL EDGE THROUGHPUT - Embodiments of a system and methods for distributed adaptive resource allocation to enhance cell edge throughput are generally described herein. Other embodiments may be described and claimed. | 10-04-2012 |
20120275497 | DOWNLINK CHANNEL PARAMETERS DETERMINATION FOR A MULTIPLE-INPUT-MULTIPLE-OUTPUT (MIMO) SYSTEM - Embodiments of methods and apparatus for providing downlink channel parameters determination for downlink channels associated with a multiple-input-multiple-output (MIMO) system are generally described herein. Other embodiments may be described and claimed. | 11-01-2012 |
20130100898 | BEAMFORMING USING BASE AND DIFFERENTIAL CODEBOOKS - Embodiments of methods and apparatus for determining and/or quantizing a beamforming matrix are disclosed. In some embodiments, the determining and/or quantizing of the beamforming matrix may include the use of a base codebook and a differential codebook. Additional variants and embodiments are also disclosed. | 04-25-2013 |
20130114658 | CHANNEL STATE INFORMATION FEEDBACK IN COORDINATED MULTI-POINT SYSTEM - Embodiments of the present disclosure describe devices, methods, computer-readable media and systems configurations for communication of channel state information among network entities. In various embodiments, may calculate first-, second- and third-stage channel state information for nodes of a coordinated multipoint measurement set. Other embodiments may be described and/or claimed. | 05-09-2013 |
20130155907 | COMBINED OMNI- AND DIRECTIONAL- COMMUNICATIONS IN HIGH-FREQUENCY WIRELESS NETWORKS - In a wireless communication network, specific portions of the communication may combine directional transmission with omnidirectional reception. In particular, sector-level directional transmission may be established through sector sweeps, followed by antenna training for more directionality. In some embodiments, collisions during the exchange may be reduced by having different network devices use different sub-channels or different time slots. In some embodiments, each network may restrict its network communications to a single sub-channel that is different than the sub-channels used by adjacent networks. | 06-20-2013 |
20130163453 | PRESENCE SENSOR WITH ULTRASOUND AND RADIO - An ultrasound and radio frequency technology is used to implement presence sensor capability for wireless devices such as, a laptap device. For example, the laptap device connects to a station device through a WiFi signal. In this example, the WiFi signal may include a data packet that synchronizes internal clocks of the laptap device with the station device. Further, the data packet may include transmitting time information for an ultrasound audio signal generated by the station device. The ultrasound audio signal is received by the laptap device that calculates time of flight (TOF) of the ultrasound audio signal. The TOF may be used to determine actual distance of the wireless device (e.g., laptap device) to the station device. | 06-27-2013 |
20130188566 | LTE ENHANCEMENTS FOR SMALL PACKET TRANSMISSIONS - Disclosed in some examples is a method of wireless resource block assignment in a long term evolution wireless network including creating a downlink control information message for a user equipment, the downlink control information message comprising: a resource block assignment field which indicates up to N physical resource blocks scheduled to the user equipment by specifying an index into a plurality of all possible physical resource block allocations of between 1 and N resource blocks, wherein the resource block assignment field comprises at most a number of bits necessary to address all of the possible physical resource block allocations for assignments of 1 to N physical resource blocks, and wherein N is less than a total number of physical resource blocks; and sending the downlink control information over a physical downlink control channel using orthogonal frequency division multiplexing. | 07-25-2013 |
20130208820 | COMMUNICATION OVERHEAD REDUCTION APPARATUS, SYSTEMS, AND METHODS - An apparatus and a system, as well as a method and article, may operate to transmit a first number of training symbols corresponding to a first number of communication chains to solicit a response including a second number of training symbols corresponding to a second number of communication chains. The first and second number of communication chains may form a portion of a multiple-input, multiple-output (MIMO) system. | 08-15-2013 |
20130223495 | TECHNIQUES USING DIFFERENTIAL PRECODING FOR HIGHLY CORRELATED CHANNELS IN WIRELESS NETWORKS - An embodiment of the present invention provides a method of using differential precoding feedback for correlated channels, comprising, transmitting by a mobile station (MS) as feedback an index angle for a differential discrete Fourier transform (DFT) codeword corresponding to a shift of a dominant beam represented by a base codeword, where the feedback corresponds to a precoding vector V(t)=Q({circumflex over (θ)}) for index angle θ, where | 08-29-2013 |
20130242770 | In enhanced physical downlink control channel (ePDCCH) - Technology for transmitting a distributed control channel element (CCE) for an enhanced physical downlink control channel (ePDCCH) and a localized CCE in a physical resource block (PRB) pair from a node and technology for physical downlink shared channel (PDSCH) physical resource block (PRB) allocation with at least one enhanced physical downlink control channel (ePDCCH) at a wireless device is disclosed. One method can include a node precoding at least one distributed CCE and at least one localized CCE for the PRB pair. The node can transmit the at least one distributed CCE for transmit diversity using at least two user equipment-specific reference signal (UERS) ports and transmitting the at least one localized CCE in the PRB pair. The at least two UERS ports can be used to transmit two CCEs. | 09-19-2013 |
20130242885 | ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL (ePDCCH) INTER-CELL INTERFERENCE COORDINATION (ICIC) - Technology for communicating enhanced physical downlink control channels (ePDCCHs) configured for inter-cell interference coordination (ICIC) for a plurality of cells in a physical resource block (PRB) is disclosed. One method can include a node mapping a serving cell control channel element (CCE) in an serving cell ePDCCH in a PRB and a coordination cell CCE in a coordination cell ePDCCH in the PRB. The node can transmit the map of the serving cell CCE and the coordination cell CCE to a wireless device. | 09-19-2013 |
20130242886 | ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL (ePDCCH) WITH PHYSICAL RESOURCE BLOCK (PRB) BUNDLING - Technology for physical resource block (PRB) bundling an enhanced physical downlink control channel (ePDCCH) with a physical downlink shared channel (PDSCH) is disclosed. One method can include a wireless device receiving from a node the ePDCCH in an ePDCCH PRB contiguous in frequency with a PDSCH PRB carrying the PDSCH. The wireless device can PRB bundle the ePDCCH PRB with the PDSCH PRB. | 09-19-2013 |
20130242947 | DOWNLINK CONTROL INFORMATION (DCI) VALIDATION FOR ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL (ePDCCH) - Technology for downlink (DL) grant validation is disclosed. One method can include a wireless device receiving from a node a downlink grant masked with a cell radio network temporary identifier (C-RNTI) for a resource allocation (RA) including an enhanced physical downlink control channel (ePDCCH) physical resource block (PRB) carrying the downlink grant. The wireless device can validate a downlink control information (DCI) format of the downlink grant. The at least two UERS ports can be used to transmit two CCEs. The wireless device can determine that the downlink grant is received with a non-matching cyclic redundancy check (CRC) when the DCI format is not validated. | 09-19-2013 |
20130243118 | MOBILE DEVICE TRANSMITTER AND METHODS FOR TRANSMITTING SIGNALS IN DIFFERENT SIGNAL DIMENSIONS FOR 3GPP LTE - Embodiments of a mobile device transmitter and methods for transmitting signals in different signal dimensions are generally disclosed herein. The mobile device transmitter comprises a mapper to map a block of two or more input modulation symbols to different signal dimensions comprising two or more spatial dimensions, and linear transform circuitry to perform a linear transform on the block of mapped input modulation symbols to generate a block of preceded complex-valued output symbols such that each output symbol carries some information of more than one input modulation symbol. The mobile device also comprises transmitter circuitry to generate time-domain signals from the blocks of precoded complex-valued output symbols for each of the spatial dimensions for transmission using the two or more antennas. The precoded complex-valued output symbols are mapped to different signal dimensions comprising at least different frequency dimensions prior to transmission. | 09-19-2013 |
20130265984 | GROUPED MACHINE-TO-MACHINE COMMUNICATIONS - Embodiments of the present disclosure describe methods, computer-readable media and system configurations for organizing wireless devices such as user equipment (“UE”) into groups and allocating wireless network resources to those groups. In an example method, a radio access network (“RAN”) node may organize a first machine-to-machine (“M2M”) wireless device and a second M2M wireless device into a group of M2M wireless devices. The RAN Node may then allocate a wireless network resource to the group of M2M wireless devices. Other embodiments may be described and/or claimed. | 10-10-2013 |
20130272182 | D2D CONNECTION RECOVERY SCHEMES - Schemes for recovering D2D connections between terminals (UEs) in an LTE network are described. The schemes may be applied in situations where a D2D connection is established between two UEs but is lost by, for example, one of the UEs entering a sleep state. The schemes may be applied to either centralized or distributed D2D systems. Some of the schemes are eNB-assisted while others are performed solely by the UEs. | 10-17-2013 |
20130272196 | INTERFERENCE NOTIFICATION IN DEVICE-TO-DEVICE COMMUNICATION - Systems and techniques for wireless device-to-device (D2D) communication are provided herein. A D2D group identifier may be included in wireless transmissions within D2D groups. D2D interference mitigation processes may be initiated when a D2D group identifier is detected by a wireless device outside the D2D group. | 10-17-2013 |
20130272214 | MAPPING OF ENHANCED PHYSICAL DOWNLINK CONTROL CHANNELS IN A WIRELESS COMMUNICATION NETWORK - In embodiments, an evolved Node B (eNB) of a wireless communication network may map individual enhanced control channel elements (eCCEs) of a physical resource block (PRB) pair to a plurality of non-continuous enhanced resource element groups (eREGs) of the PRB pair. The eNB may further map the plurality of eREGs to individual antenna ports for transmission to the UE, with individual antenna ports associated with a continuous group of eREGs. The eNB may assign at least a portion of an enhanced physical downlink control channel (ePDCCH) to one or more of the eCCEs for transmission to the UE. Additionally, or alternatively, an eNB may map eCCEs of a plurality of PRB pairs to a plurality of distributed resource block (DRB) pairs. | 10-17-2013 |
20130272262 | MULTI-ACCESS SCHEME AND SIGNAL STRUCTURE FOR D2D COMMUNICATIONS - A signal structure for use in D2D communications is described. In one embodiment, a preamble for automatic gain control at the receiver end is included in the transmitted signal. Techniques for scheduling of D2D transmissions using carrier sensing multiple access (CSMA) and a power control schemes for interference management are also described. | 10-17-2013 |
20130273923 | APPARATUS AND METHOD TO ENABLE DEVICE-TO-DEVICE (D2D) DISCOVERY IN CELLULAR NETWORKS - An apparatus and method of allowing user equipment (UE) to transmit information directly with other user equipment, using a device-to-device (D2D) mode is disclosed herein. A D2D UE (dUE | 10-17-2013 |
20130286999 | BASE STATION AND METHOD FOR RESOURCE ALLOCATION USING LOCALIZED AND DISTRIBUTED RESOURCE BLOCKS - Embodiments of a base station and method for resource allocation using localized and distributed resource blocks are generally described herein. The base station comprises processing circuitry to allocate localized resources to user stations based on receipt of channel quality information received from the user stations and to allocate distributed resource to user stations based on non-receipt of channel quality information. The base station also comprises physical layer circuitry to transmit control information on a physical channel to indicate the resources that are allocated to each scheduled user station. | 10-31-2013 |
20130287000 | TECHNIQUES FOR FORMATTING SIGNALS FOR TRANSMISSION USING A WIRELESS NETWORK - Techniques are described for forming signals for transmission to a receiver. Two transmitters can form resource blocks with different Physical Uplink Control Channel (PUCCH) demodulation reference signal (DMRS) patterns that are orthogonal over time and/or frequency to each other. The transmitters can simultaneously transmit the same resource block but with different DMRS patterns. If a receiver is mounted with two antennas, the receiver can utilize a MIMO receiver to differentiate resource blocks from two transmitters. | 10-31-2013 |
20130287139 | SYSTEM AND METHOD OF RANK ADAPTATION IN MIMO COMMUNICATION SYSTEM - An apparatus may include a transmitter arranged to wirelessly transmit channel status reports for channels within a transmission band to a base station and a processor. The apparatus may further include a rank adaptation (RA) module operable on the processor to direct the transmitter to send a multiplicity of sub-band channel quality indicator (CQI) reports, each sub-band CQI report comprising a measurement of a respective sub-band of the transmission band and a multiplicity of rank indicator (RI) reports, where each sub-band CQI report is accompanied by an RI report. The apparatus may further include a digital display arranged to display information transmitted via the base station to the apparatus. Other embodiments are disclosed and claimed. | 10-31-2013 |
20130294390 | SYSTEM AND METHOD OF UPLINK POWER CONTROL IN A WIRELESS COMMUNICATION SYSTEM - An apparatus may include a transceiver operable to receive a downlink message from a base station for a serving cell, the downlink message allocating a set of control parameters. The apparatus may also include a processor circuit communicatively coupled to the transceiver and an uplink power control module operable on the processor circuit to read the set of control parameters, and apply a signal-to-noise-and-interference (SINR) parameter based on the received set of control parameters to determine physical uplink shared channel (PUSCH) power to be applied for a PUSCH transmission. Other embodiments are disclosed and claimed. | 11-07-2013 |
20130301438 | APPARATUS AND METHOD TO ESTABLISH A DEVICE-TO-DEVICE (D2D) CONNECTION IN A 3GPP-LTE NETWORK USING A DISTRIBUTED CHANNEL SCAN - An apparatus and method that allow user equipment (UE) to transmit information directly with other user equipment, using a device-to-device (D2D) mode is disclosed herein. A first D2D UE (dUE | 11-14-2013 |
20130301549 | DOWNLINK CONTROL INDICATION FOR A STAND-ALONE NEW CARRIER TYPE (NCT) - Technology for determining a common search space (CSS) from a physical resource block (PRB) indication for a stand-alone carrier type is disclosed. In an example, a user equipment (UE) configured for determining a common search space (CSS) from a physical resource block (PRB) indication for a stand-alone carrier type can include a processing module to: Determine a PRB set in the CSS from an enhanced physical hybrid automatic repeat request (ARQ) indicator channel (ePHICH) configuration information in a master information block (MIB); and decode an enhanced physical downlink control channel (ePDCCH) or the ePHICH from PRB region candidates in the PRB set. | 11-14-2013 |
20130303167 | COORDINATED DYNAMIC POINT SELECTION (DPS) WITH CELL RANGE EXPANSION IN A COORDINATED MULTIPOINT (CoMP) SYSTEM - Technology for mitigating edge effect interference in a Coordinated MultiPoint (CoMP) system having multiple CoMP clusters is disclosed. In an example, a method can include a macro node transmitting a cell range expansion request to user equipments (UEs) within a cell. A CoMP cluster for nodes within the cell that includes UEs operating with the cell range expansion can be generated. Blanked resources between a plurality of macro nodes for the CoMP clusters in the CoMP system can be coordinated using a muting preference including a blanked resource. | 11-14-2013 |
20130336152 | STRUCTURED CODEBOOK FOR UNIFORM CIRCULAR ARRAY (UCA) - Embodiments of the present disclosure describe method, apparatus, and system configurations that implement or otherwise use a codebook designed for antennas configured in a circular array. A method includes receiving, by user equipment (UE) from an enhanced node B (eNB) station of a wireless communication network, a Channel State Information Reference Signal (CSI-RS) for the UE to perform channel measurements of multiple antennas of the eNB station, wherein the multiple antennas are configured in one or more circular arrays, performing, by the UE, channel measurements of the multiple antennas of the eNB station using the received CSI-RS, and determining, by the UE, a code word based on the channel measurements, the code word being stored in a codebook designed for a circular antenna array. Other embodiments may be described and/or claimed. | 12-19-2013 |
20140003240 | SUPPORTING MEASURMENTS AND FEEDBACK FOR 3D MIMO WITH DATA TRANSMISSION OPTIMIZATION | 01-02-2014 |
20140010216 | FEEDBACK SCHEME FOR MU-MIMO - Embodiments of a system and method for managing feedback in a MU-MIMO system. An access point can announce one or more of mobile stations that are to receive downlink information in a first frame. The access point can also send a sounding package to the one or more mobile stations and receive feedback from the one or more mobile stations according to the feedback schedule. The feedback may be based on the reception of the sounding package. | 01-09-2014 |
20140016714 | LARGE DELAY CYCLIC DELAY DIVERSITY (CDD) PRECODER FOR OPEN LOOP MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) - A physical channel processor on a wireless device and method for precoding for spatial multiplexing in an open-loop multiple-input multiple-output (MIMO) mobile communication system is disclosed. The method comprises the operation of receiving an input vector block from a layer mapper. The input vector block includes user equipment-specific reference signals (UE-RSs) or data in a physical downlink shared channel (PDSCH). The operation of generating a large delay cyclic delay diversity (CDD) vector block from the input vector block using a precoder configured for large delay CDD on an antenna port follows. The data can be resource element mapped with UE-RSs or channel-state information reference signals (CSI-RSs) in a physical resource block (PRB). | 01-16-2014 |
20140018004 | METHODS AND ARRANGEMENTS FOR BEAM REFINEMENT IN A WIRELESS NETWORK - In some embodiments a beamforming method is disclosed. The method can include transmitting a beam having a channel defined by a maximum ratio transmission vector (MRT) and receiving a first response from a receiver, where the first response has first information such as parameters related to the transmitted beam. Using the parameters and the initial MRT, another directional transmission can be made. A similar process can determine a maximum combining ratio for a receiver. Set up communications between the transmitter and the receiver can be reduced by omitting data from transmission that can be acquired by other means such as from memory or calculations. Additional embodiments are also disclosed. | 01-16-2014 |
20140036792 | DEVICE-TO-DEVICE ON-DEMAND ADVERTISEMENT - Embodiments of computer-implemented methods, systems, computing devices, and computer-readable media are described herein for device-to-device on-demand advertisement. In some embodiments, the method may include receiving a request for broadcasting an advertisement by a device-to-device (D2D) advertiser via a D2D communication protocol, requesting that an evolved NodeB (eNB) associated with the D2D advertiser allocate a resource for broadcasting the advertisement by the D2D advertiser, determining that the broadcasting the advertisement is no longer needed, and requesting that the eNB retrieve the allocated resource. Other embodiments may be described and claimed. | 02-06-2014 |
20140036876 | HIGH EFFICIENCY DISTRIBUTED DEVICE-TO-DEVICE (D2D) CHANNEL ACCESS - Techniques for facilitating device-to-device (D2D) communications using a high efficiency distributed channel access scheme are generally described herein. In some examples, a communication zone allocated for wireless D2D communications is divided into resource contention and scheduled transmission portions. The resource contention segment may be used to transmit a request message from a transmitting device to a receiving device (a request-to-send message), and transmit a response to the request message from the receiving device to the transmitting device (a clear-to-send message). The response can indicate a time for the data transmission to occur during the scheduled transmission segment. During the scheduled transmission segment, the scheduled data transmission and other D2D data transmissions among the various devices will be performed. In further examples, contention access techniques may be used during the resource contention segment to manage access to the resource channel. | 02-06-2014 |
20140038661 | POWER LOADING IN MU-MIMO - Embodiments of a system and method for transmitting data from an access point in a multiple user multiple input multiple output (MU-MIMO) system are provided. A first indication of signal quality (ISQ) is received at the access point from a first station and a second ISQ is received from a second station. The access point sets a first power level and a first modulation and coding scheme (MCS) for transmission of a first aggregated media access control (MAC) protocol data unit (A-MPDU) to the first station as a function of the first ISQ and an amount of payload data corresponding to the first A-MPDU. The access point also sets a second power level and a second MCS for transmission of a second A-MPDU as a function of the second ISQ and an amount of payload data corresponding to the second A-MPDU. | 02-06-2014 |
20140044070 | ENHANCED NODE B AND METHOD OF TRANSMITTING PHYSICAL-DOWNLINK CONTROL CHANNELS (PDCCHS) IN A LTE-A SYSTEM - Embodiments of an eNB and method of transmitting PDCCHs are generally described herein. In some embodiments, the eNB may be configured to transmit PDCCHs that are based on a UE-specific reference signal (i.e., a UE-RS). In these embodiments, the UEs may be able to demodulate their PDCCH using a demodulation reference signal (DM-RS) that is specific to the UE (e.g., instead of a common reference signal). The PDCCHs disclosed herein may be suitable the Uu interface of an LTE-A system. | 02-13-2014 |
20140064201 | APPARATUSES AND METHODS FOR CSI-RS CONFIGURATION IN DISTRIBUTED RRH SYSTEMS - Apparatuses and methods for channel state information reference signal (CSI-RS) configuration in distributed remote radio head (RRH) systems are described. A transmission point selection module can receive a user equipment (UE) signal via a transmission point from a plurality of transmission points sharing a single cell identification. A downlink transmission point can be selected based on the UE signal. The UE can then be configured to report CSI-RS measurements for the selected downlink transmission point. | 03-06-2014 |
20140072068 | ENHANCED PERFORMANCE MULTI-USER MULTIPLE INPUT OUTPUT (MU-MIMO) RADIO LINKS - Technology is described for enhancing performance of multi-user multiple input multiple output (MU-MIMO) radio links. A system can include a scrambling module to scramble coded bits in codewords to be transmitted in a transmission. A modulation mapper can modulate the scrambled coded bits to generate modulation symbols in the transmission. A precoding module can precode modulation symbols for the transmission. A feedback module using a codebook with an increased number of codewords can be used to reduce a channel state information (CSI) quantization error in a transmission from a plurality of antennas coupled to the precoding module and configured to transmit the precoded transmission to multiple users. | 03-13-2014 |
20140078996 | MIMO BEAMFORMING METHOD AND METHOD OF CONSTRUCTING A DIFFERENTIAL CODEBOOK FOR A WIRELESS NETWORK - A MIMO beamforming method comprises receiving at a base station information regarding a difference between an ideal beamforming matrix and an averaged beamforming direction, using the information to construct a beamforming matrix at the base station, and performing a beamforming operation using the reconstructed beamforming matrix. Alternatively, the method comprises computing at a subscriber station an averaged beamforming direction, computing at the subscriber station a quantization index corresponding to a differential matrix in a differential codebook, and transmitting the quantization index across a wireless channel of the wireless network. The differential codebook may be constructed by identifying a codebook center and transforming a predefined codebook that is stored in a memory of a component of the wireless network. | 03-20-2014 |
20140092821 | DETERMINATION OF ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL CANDIDATES IN A WIRELESS COMMUNICATION NETWORK - In embodiments, an evolved Node B (eNB) of a wireless communication network may configure an enhanced physical downlink control channel (EPDCCH) physical resource block (PRB) set for a user equipment (UE). The EPDCCH-PRB set may include a plurality of PRB-pairs. The EPDCCH-PRB set may further include a plurality of enhanced resource element groups (EREGs) organized into localized enhanced control channel elements (ECCEs) having EREGs of the same PRB-pair and distributed ECCEs having EREGs of different PRB-pairs. In some embodiments, the eNB may determine a set of distributed EPDCCH candidates for the UE from the EPDCCH-PRB set, wherein the individual distributed EPDCCH candidates include one or more of the distributed ECCEs, and wherein the set of distributed EPDCCH candidates includes at least one EREG from each of the plurality of localized ECCEs. Other embodiments may be described and claimed. | 04-03-2014 |
20140092830 | BLIND DECODING FOR AN ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL (EPDCCH) - Technology for blind decoding downlink control information (DCI) from an enhanced physical downlink control channel (EPDCCH) is disclosed. In an example, a user equipment (UE) can include a processor configured to: Recursively attempt to decode the DCI from enhanced control channel elements (ECCE) of the EPDCCH from physical resource block (PRB) region candidates in a PRB set using a selected set of enhanced resource element group (EREG) index maps for the ECCE until the DCI is successfully decoded; and decode the DCI with an EREG index map associated with a same aggregation level used to encode the DCI. Each EREG index map can be configured for a different aggregation level (AL). | 04-03-2014 |
20140105109 | Joint Transmission in a Wireless Network - A system for receiving joint transmission wireless signals may include a transceiver to receive a plurality of colliding wireless signals. One of the wireless signals may include reference signal data while another of the wireless signals may include user data. The reference signal data may be combined with the user data into a superimposed signal. The reference signal data may be filtered out from the superimposed data, and the user data may be decoded. | 04-17-2014 |
20140112406 | TECHNOLOGY FOR CSI FEEDBACK IN A MIMO COMMUNICATION SYSTEM - Technology for channel state information (CSI) feedback in a multiple-input multiple-output (MIMO) communication system is disclosed. A method comprises receiving, at a mobile device, a dynamic channel state information (CSI) feedback switch signal from a transmission station that identifies a selected CSI feedback state for the mobile device. A process for selecting a precoding matrix indicator (PMI) and a rank indicator is identified based on the CSI feedback switch signal as either a process configured for MU-MIMO reception or single-user (SU) MIMO reception of a downlink signal at the mobile device. | 04-24-2014 |
20140126487 | MAPPING AN ENHANCED PHYSICAL DOWNLINK CONTROL CHANNEL - Technology for mapping an enhanced physical downlink control channel to physical resource blocks in a radio frame is disclosed. One method comprises mapping modulated symbols in the ePDCCH to at least one control channel element. The at least one control channel element can be mapped to resource elements located in a plurality of distributed physical resource blocks in a subframe, wherein each resource block is separated by at least one additional resource block in the subframe. The mapping can also be to resource elements distributed in a single resource block in the subframe, wherein the control channel element is mapped to be distributed in frequency and time relative to other mapped resource elements in the single resource block. | 05-08-2014 |
20140133445 | ENHANCED NODE B AND METHOD FOR PRECODING WITH REDUCED QUANTIZATION ERROR - Embodiments of an enhanced Node B (eNB) and method for precoding with reduced quantization error are generally described herein. In some embodiments, first and second precoding-matrix indicator (PMI) reports may be received on an uplink channel and a single subband precoder matrix may be interpolated from precoding matrices indicated by both the PMI reports. Symbols for multiple-input multiple output (MIMO) beamforming may be precoded using the interpolated precoder matrix computed for single subband for a multiple user (MU)-MIMO downlink orthogonal frequency division multiple access (OFDMA) transmission. In some embodiments, each of the first and second PMI reports includes a PMI associated with a same subband that jointly describes a recommended precoder. | 05-15-2014 |
20140140304 | CONTENTION-BASED TRANSMISSION WITH CONTENTION-FREE FEEDBACK FOR REDUCING LATENCY IN LTE ADVANCED NETWORKS AND ENHANCED PUCCH - Methods for contention-based transmission with contention-free feedback for reduced latency in LTE Advanced networks and an enhanced PUCCH are generally disclosed herein. User equipment (UE) may transmit a contention sequence on a physical uplink control channel (PUCCH) to an enhanced-Node B (eNB) and may concurrently transmit data requesting uplink resources on a physical uplink shared channel (PUSCH) to the eNB. The contention sequence is transmitted on the PUCCH in accordance with a format that is assigned by the eNB. The contention sequence is either randomly selected by the UE or assigned by the eNB. When the contention sequence and data are not successfully received by the eNB, the UE may fall back to a more conventional random access channel (RACH) procedure for uplink resource allocation. | 05-22-2014 |
20140146752 | LAYER SHIFTING IN OPEN LOOP MULTIPLE-INPUT, MULTIPLE-OUTPUT COMMUNICATIONS - Embodiments of the present disclosure describe methods, apparatuses, and systems related to use of interphase/quadrature component layer shifting in open loop multiple-input, multiple-output communications. Other embodiments may be described and/or claimed. | 05-29-2014 |
20140153662 | DOWNLINK TRANSMIT BEAMFORMING - A wireless network access point can operate as a closed loop MIMO device when communicating with a station that is operating as an open loop MIMO device. Transmit/receive chains in the access point are calibrated to support aggregate channel reciprocity. | 06-05-2014 |
20140169298 | DEVICE-TO-DEVICE DISTRIBUTED SCHEDULING - A system and method for distributed scheduling of transmissions between device-to-device (D2D) communications is disclosed. The distributed scheduling method employs a distributed scheduling structure in which device identifiers rather than connection identifiers are used to enable scheduling of a D2D data transfer between devices in a wireless neighborhood. The novel distributed scheduling structure is scalable to a larger number of D2D devices than is feasible with a connection ID-based tone matrix. | 06-19-2014 |
20140177541 | PDSCH RESOURCE ELEMENT MAPPING FOR THREE-CELL JOINT TRANSMISSION - A PDSCH resource element mapping method is used for joint transmissions. The method solves a problem of colliding resource elements in joint transmissions, due to interference caused when PDSCH resource elements are transmitted in the resource block of one cell and cell-specific reference signals (CRSs) are transmitted in the same location of the resource block of an adjacent cell. The method is particularly beneficial for coordinated multipoint (CoMP) transmissions. The PDSCH resource element mapping method employs one of three schemes for transmitting the collided resource elements, with minimal interference. In the first scheme, one PDSCH symbol is transmitted over three consecutive CRS-collided PDSCH resource elements. In the second scheme, two PDSCH symbols are transmitted over three consecutive CRS-collided PDSCH resource elements. In a third scheme, CRS-collided resource elements are transmitted using a lower modulation order than is specified by the modulation and coding scheme. | 06-26-2014 |
20140185532 | DOWNLINK AND UPLINK INTERFERENCE MITIGATION IN A MULTICELL NETWORK USING INTERFERENCE CANCELLATION AND ORTHOGONAL RESOURCE ALLOCATION - Interference mitigation in a multicell network uses interference cancellation and orthogonal resource allocation. A backhaul channel is used to share reference signals that may be used to cancel interference from neighboring cell downlink signals. Also, resource blocks assigned to a first user equipment in a first cell are orthogonal to the resource allocated to user equipment assigned to a second user equipment in a second cell that is in close proximity to the first user equipment. | 07-03-2014 |
20140185542 | DOWNLINK CHANNEL PARAMETERS DETERMINATION FOR A MULTIPLE-INPUT-MULTIPLE-OUTPUT (MIMO) SYSTEM - Embodiments of methods and apparatus for providing downlink channel parameters determination for downlink channels associated with a multiple-input-multiple-output (MIMO) system are generally described herein. Other embodiments may be described and claimed. | 07-03-2014 |
20140192848 | SENDING INFORMATION AT A BAND EDGE WITHIN AN ORTHOGONAL FREQUENCY-DIVISION MULTIPLEXING (OFDM) SYMBOL - Technology is discussed for increasing the spectral efficiency of an Orthogonal Frequency-Division Multiplexing (OFDM) symbol. Spectral efficiency can be increased by adding information to a band edge of the OFDM symbol in connection with measures taken to reduce OOB spectral leakage from the OFDM symbol. Spectral leakage reduction measures can include application of a tapering window to at least a portion of OFDM data in the time domain to reduce power in side-lobes in the frequency domain. In some examples, such measures can comprise reducing transmission power at certain frequencies for a set of adjacent sub-carriers within the OFDM symbol at or near the band edge of the OFDM symbol. The additional bandwidth at the OFDM symbol can be used for many different applications, such as, without limitation, Device-to-Device (D2D) communication and/or Machine-to-Machine (M2M) communication. | 07-10-2014 |
20140247860 | CODEBOOK AND CODEBOOK SEARCH - Briefly, in accordance with one or more embodiments, a codebook used to provide a precoding matrix indicator and/or channel state information comprises one or more rank-1 codewords and at least one or more rank-2 codewords exhibiting a nesting property with the rank-1 codewords, and one or more rank-2 codewords not exhibiting a nesting property with the rank-1 codewords. Further, the rank-1 codewords may include at least some Discrete Fourier Transform (DFT) vectors, and at least some vectors that are optimized for a cross polarize array of antennas if the array of antennas is cross polarized. The codebook may be utilized for single-user multiple-input, multiple-output (SU-MIMO) or multi-user multiple-input, multiple-output (MU-MIMO). | 09-04-2014 |
20140269664 | FILLING THE SPACE-TIME CHANNELS IN SDMA - Embodiments of the present invention provide an Access Point (AP) to transmit and receive RF signals in a wireless local area network (WLAN), comprising, a processor to process the RF signals, a scheduler to schedule data packets that may have differing lengths for transmission to selected mobile stations, a Radio Frequency (RF) transceiver to receive and transmit the RF signals using space-time channels, and a code rate adjuster to adjust a code rate of Forward Error-Correction (FEC) codes in the packets to fill the space-time channels. | 09-18-2014 |
20140269968 | METHOD AND APPARATUS USING A BASE CODEBOOK STRUCTURE FOR BEAMFORMING - Techniques for a precoding scheme for wireless communications are described. A method and apparatus may comprise a first device for a communications system to determine a beamforming structure for a closed loop transmit beamforming scheme using channel information, one or more scaling factors and one or more integers to represent a complex vector. The beamforming structure may include a codeword, a codebook and a codeword index. Other embodiments are described and claimed. | 09-18-2014 |
20140286133 | DEVICE-TO-DEVICE ANGLE DETECTION WITH ULTRASOUND AND WIRELESS SIGNAL - A method for determining orientation of an electronic device relative to another electronic device is described. The method includes synchronizing internal clock of a first electronic device with internal clock of a second electronic device using electromagnetic signals communicated between the first electronic device and the second electronic device, sending two or more sound waves from the second electronic device, receiving the two or more sound waves at the first electronic device, and calculating orientation of the first electronic device relative to the second electronic device based on a difference in time of arrival of the two or more sound waves at the first electronic device. The first electronic device and the second electronic device each have at least one transceiver configured to send and receive electromagnetic signals. The first electronic device has two or more acoustoelectric transducers and the second electronic device has one or more acoustoelectric transducer. | 09-25-2014 |
20140295858 | USER EQUIPMENT AND METHOD FOR DISTRIBUTED CHANNEL ACCESS FOR D2D COMMUNICATIONS - Embodiments of a system and method for distributed channel access for device-to-device (D2D) communication in a wireless network are generally described herein. User equipment (UE) may transmit a connection identifier (CID) code at a beginning of a contention window to request channel access for a D2D transmission to a receiving device. Links for D2D transmissions from a transmitting device to a receiving device are identified by a CID that is mapped to a CID code. The UE may receive a bandwidth grant from the receiving device during the contention window, along with bandwidth grants for other CIDs, in an order based on a priority level of the CID. The UE may transmit data after reception of the bandwidth grants in time-frequency resources indicated in an associated one of the bandwidth grants. In some embodiments, spatial-reuse and variable resource size allocation are supported. | 10-02-2014 |
20140355529 | SYSTEM AND METHOD OF MANAGING WIRELESS COMMUNICATIONS WITH MULTIPLE TRANSMISSION POINTS - An apparatus includes a processor a channel state information (CSI) module operative on the processor to evaluate channel state information for a multiplicity of transmission points and to allocate a selection of channel state information reference signals (CSI-RS) to an uplink sub-frame allotted for transmitting channel quality/precoding matrix index/rank indicator (CQI/PMI/RI) information to a transmission point. The apparatus may further include a wireless transceiver operative to transmit the selection of CSI-RS in the uplink sub-frame to the transmission point in a wireless network, and receive information from the transmission point in response to the CSI-RS and a digital display operative to present the information received from the transmission point. | 12-04-2014 |
20140355705 | USER EQUIPMENT AND METHODS FOR CODEBOOK SUBSAMPLING FOR ENHANCED 4TX CODEBOOKS - Embodiments of user equipment (UE) and methods for codebook subsampling for enhanced 4TX codebooks in 3GPP LTE wireless networks are generally described herein. In some embodiments, a physical uplink control channel (PUCCH) is configured for transmission of channel state information (CSI) feedback including a rank indicator (RI) and a precoding matrix (W1). The rank indicator (RI) and a precoding matrix (W1) are jointly encoded and codebook subsampling is performed for the enhanced 4Tx codebook for at least one of: PUCCH report type 5 (RI/1st PMI) in PUCCH 1-1 submode 1; PUCCH report type 2c (CQI/1st PMI/2nd PMI) in PUCCH 1-1 submode 2; and PUCCH report type 1a (subband CQI/2nd PMI) in PUCCH 2-1. | 12-04-2014 |
20150029875 | DOWNTILT SELECTION IN A FULL DIMENSIONAL MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEM - A technology for an enhanced node B (eNode B) in a cellular network that is operable to determine downtilt using full dimensional (FD) multiple-input multiple-output (MIMO). A plurality of orthogonal frequency division multiple access (OFDMA) signals can be transmitted, wherein each transmitted OFDMA signal is transmitted with a selected downtilt angle from a two dimensional antenna array of the eNode B. Reference signal received power (RSRP) feedback information can be received from a UE for each of transmitted OFDMA signals at the selected downtilt angles. Received signal strength indicator (RSSI) feedback information can be received from the UE. A reference signal received quality (RSRQ) can be calculated for each of the selected antennas angles using the RSRP feedback information and the RSSI feedback information. A downtilt angle can be selected for transmitting data from the eNode B with a highest signal to interference plus noise ratio (SINR). | 01-29-2015 |
20150043438 | LONG-TERM EVOLUTION DEVICE-TO-DEVICE DISCOVERY USING CONTROL CHANNEL - Device-to-device (D2D) communications between user equipment (UE) allows two UEs in a long-term evolution (LTE) network to communicate directly with each other without the need to first send their communications to a network (such as via an evolved node B). In order to communicate in a D2D mode, the UEs first need to discover each other. One method of allowing the UEs to discover each other involves the use of a physical uplink control channel (PUCCH). After a network determines that certain UEs would benefit from D2D communication, the UEs can be set up to send and receive discovery signals using the PUCCH. | 02-12-2015 |
20150049732 | SIGNALING AND CHANNEL DESIGNS FOR D2D COMMUNICATIONS - Described are methods and devices for enabling D2D communications with signal structures that require minimal changes to the current LTE architecture. In the embodiments described, the eNB grants resources to UEs for D2D communication and either initiates or permits a pair of UEs to establish a D2D link. Certain embodiments are designed to minimize changes to the current LTE control signaling structure by having the control signaling always come from the eNB as in a normal cellular link so that the transmitting UE transmits over a data channel (e.g., PUSCH/PDSCH) that the receiving UE is able to decode. | 02-19-2015 |
20150055454 | USER EQUIPMENT AND METHOD FOR ENHANCED UPLINK POWER CONTROL - Embodiments of user equipment and methods for improved uplink transmission power management and scheduling, are generally described herein. For example, in an aspect, a method of uplink power management is presented, the method includes determining whether a total desired transmission power exceeds a total configured maximum output power for a subframe. When the total desired transmission power exceeds the total configured maximum output power, the method includes allocating a minimum proactive power limitation to each serving cell, assigning a remaining power to one or more channels based on priority, and computing a total power assignment based on the allocating and the assigning. | 02-26-2015 |