Interdigital Technology Corporation

Interdigital Patent Holdings, Inc.

Magnolia Broadband Inc.

Yingxue K Li

Philip J Pietraski

Haim Harel

Carl Wang

Stephen E Terry

Inhyok Cha

Onur Sahin

Guodong Zhang

Janet A Stern-Berkowitz

Ravikumar V Pragada

Afshin Haghighat

Samian Kaur

Douglas R Castor

Kenneth Kearney

Gregg Arthur Charlton

Alexander Segalovitz

Christopher R Cave

Benoit Pelletier

Robert L Olesen

Fengjun Xi

Arty Chandra

Lujing Cai

Hong O Zhang

Yan Li

Hongsan Sheng

William Reinisch

Paul Marinier

Diana Pani

Qing Li

Sung-Hyuk Shin

Jin Wang

Manasa Raghavan

Prabhakar Chitrapu

Donald M Grieco

Phil Chen

Ana Lucia Iacono

John S Chen

Muhammad U Fazili

James C Otto

Keith Richard Baldwin

William E Lawton

Jialing Li

Shahrokh Nayeb Nazar

Goudong Zhang

Mark F Kahn

Kenneth P Kearney

Methods and apparatus for changing cell range coverage are disclosed. A wireless transmit/receive unit (WTRU) may include circuitry configured to transmit subframes of radio frames using a physical uplink shared channel (PUSCH), where the subframes are divided into first and second sets. The circuitry may include a first power control loop utilized for the first set of subframes and a second power control loop utilized for the second set of subframes. The first power control loop may set transmission power levels for transmission over the PUSCH for the first set of subframes, and the second power control loop may set transmission power levels for transmission over the PUSCH for the second set of subframes. The circuitry may be configured with a first physical uplink control channel (PUCCH) for a first eNodeB and a second PUCCH for a second eNodeB to simultaneously communicate with the first and the second eNodeBs.

Method and apparatus for data-splitting transmission from multiple sites

Methods and apparatuses for millimeter wave (mmW) beam acquisition are disclosed. An apparatus may include a processor and a transceiver configured to receive a plurality of signals. The plurality of signals may be swept over time using a respective plurality of beams, and each signal of the plurality of signals may include a sequence based on an index of a respective one of the plurality of beams. The processor and the transceiver may take a measurement of a first signal of the plurality of signals. The transceiver may transmit a measurement report including the measurement of the first signal of the plurality of signals and the index of a respective one of the plurality of beams.

Method and apparatus for a millimeter wave communication system

Methods and apparatus for changing cell range coverage are disclosed. A wireless transmit/receive unit (WTRU) may include circuitry configured to transmit subframes of radio frames using a physical uplink shared channel (PUSCH), where the subframes are divided into first and second sets. The circuity may include a first power control loop utilized for the first set of subframes and a second power control loop utilized for the second set of subframes. The first power control loop may set transmission power levels for transmission over the PUSCH for the first set of subframes, and the second power control loop may set transmission power levels for transmission over the PUSCH for the second set of subframes. The circuitry may be configured with a first physical uplink control channel (PUCCH) for a first eNodeB and a second PUCCH for a second eNodeB to simultaneously communicate with the first and the second eNodeBs.

Methods and apparatuses for millimeter wave (mmW) beam acquisition are disclosed. An apparatus may include a processor and a transceiver configured to receive configuration information from a first network node using a first radio access technology (RAT). The configuration information may include an index associated with a beam of a second network node and timing information corresponding to the first RAT. The second network node may use a second RAT. The apparatus may be further configured to transmit a measurement report to the first network node that includes a measurement of the beam and index associated with the beam of the second network node.

Systems, methods, and instrumentalities are disclosed for a user equipment (UE) to provide feedback in a multi-site scheduling system (e.g., a system where multiple entities may schedule and/or send data to the UE). For example, the UE may receive a first data from a first network entity and a second data from a second network entity. A network entity may include entities that transmit data and/or control information to the UE, e.g., an eNodeB (eNB). The UE may generate feedback relating to received data, such as ACK/NACK information or channel state information (CSI). The UE may send a first feedback relating to the first data in a first subframe and a second feedback relating to the second data in a second subframe.

Uplink feedback for multi-site scheduling

Methods and apparatus for millimeter wave (mmW) beam acquisition are disclosed. An apparatus includes a transmitter configured to transmit millimeter wave (mmW) WTRU (mmW WTRU) information over a cellular system to a base station a receiver and a processor. The receiver receives a list of candidate mmW base stations (mB) including mmW acquisition start timing information from the base station, and the processor calculates correlation values around the received mmW acquisition start timing information for the mBs in the list.

Feedback information for multiple serving cells are transmitted on high speed dedicated physical control channel (HS-DPCCH). A slot format for transmitting feedback information is determined based on the number of configured secondary serving cells and whether multiple input multiple-output (MIMO) is configured in the serving cells. Spreading factor is reduced to 128 when two secondary serving cells are configured and MIMO is configured in at least one of the two configured secondary serving cells, or when three secondary serving cells are configured. The serving cells are grouped into feedback groups, each feedback group having one or more serving cells. Channel coding may be applied to feedback information for the feedback groups. The resulting encoded feedback information for the feedback groups is concatenated to form composite feedback information.

Sending feedback for multiple downlink carriers

An iterative nonlinear preceding method based on, for example. Tomlinson-Harashima Preceding (THP) may be implemented in a MU-MIMO system to alleviate the performance degradation due to mismatches between actual Channel State Information (CSI) and impaired CSI available at a transmitter. In such a method, the effective channel may be fed back rather than a nonprecoded channel for a relay backhaul channel such that the iterative precoding and effective channel feedback may reduce the sensitivity to quantization errors and improve spectrum usage efficiency. Additionally, a Channel Quality Indicator (CQI) may be used to estimate a signal-to-interference-plus-noise (SINK) ratio based on quantization errors to accurately derive the effective channel quality of the receiver.

Iterative nonlinear precoding and feedback for multi-user multiple-input multiple-output (MU-MIMO) with channel state information (CSI) impairments

Methods and apparatus for multiple-input multiple-output (MIMO) transmissions are disclosed. A base station may precode wireless transmit/receive unit (WTRU)-specific reference signals and data that are transmitted to a WTRU using a randomly selected precoder. The precoder may be selected based on a predefined precoder selection sequence or by the base station. A different precoder may be applied to different resource blocks (RBs). In addition, a large delay cyclic delay diversity (CDD) or discrete Fourier transform (DFT) spreading may be applied on the WTRU-specific reference signals and the data. For heterogeneous deployed antennas, spatial diversity gain is achieved by dynamically scheduling resources between transmission points. A hopping scheme may be applied across the transmission points as the resources are dynamically partitioned between the transmission points. A different randomly selected precoder may be applied to each RB transmitted from a different transmission point.

Open loop spatial processing

Techniques for inter-cell interference cancellation are disclosed. At each transmitter, the data (message) may split into two or more layers, (e.g., common and private parts), and may be encoded in different rates, allocated with different powers, possibly beamformed using different precoders, and transmitted through the same physical channels. The common part is to be decoded at both the intended and unintended users, while the private part is to be decoded at the intended user.

Method and apparatus for interference mitigation via successive cancellation in heterogeneous networks

A method and apparatus for using demodulation reference signal (DM-RS) based channel state information (CSI) feedback in Orthogonal Frequency Division Multiplexing-multiple-input multiple-output (OFDM-MIMO) systems is disclosed. The wireless transmit/receive unit (WTRU) receives one or more resource blocks from a base station, wherein the resource blocks (RBs) include demodulating reference signals (DM-RS) and precoder information. The precoder information is sent unicast or broadcasted over a common control channel. The WTRU estimates an effective channel estimate based on the DM-RS, derives an unprecoded channel based on the effective channel and the precoder information, generates CSI feedback based on the unprecoded channel, and transmits the CSI feedback to the base station. Alternatively, the WTRU estimates an effective channel estimate based on the DM-RS, quantizes the effective channel estimate and transmits the CSI feedback to the base station.

Demodulation reference signal based channel state information feedback in OFDM-MIMO systems

A method and apparatus of reducing interference in space frequency block coding (SFBC) communication are disclosed. SFBC encoding is performed on at least one pair of symbols. The symbols are assigned to subcarriers in accordance with a frequency assignment pattern assigned to a cell. Different frequency assignment patterns are assigned to neighboring cells. Cells in the network may be divided into a plurality of groups and a different frequency assignment pattern may be assigned to each group of cells. The frequency assignment pattern may be defined such that subcarriers mapped to a pair of symbols in one cell are interlaced to subcarriers mapped to a pair of symbols in a neighbor cell. Alternatively, the frequency assignment pattern may be defined such that subcarriers mapped to a pair of symbols in one cell are shifted in a neighbor cell.

Method and apparatus for reducing interference in space frequency block coding communication

A client station in a wireless local area network (WLAN) communication system includes a beam commutation algorithm and a smart antenna responsive to the beam commutation algorithm for selecting one of a plurality of directional antenna beams. The smart antenna is configured as a virtual omni-directional antenna by using a commutation of switched directional antenna beams. A switched directional antenna system that performs a commutation sequencing can be blind to environmental conditions and changes.

Methods for improving wireless communications when interference or signal loss is directional in nature

Growing community of inventors

Exton, PA, United States of America

Yingxue K Li