Texas Instruments Corporation

Virewirx, Inc.

Xcom Labs, Inc.

Anthony Edet Ekpenyong

Runhua Chen

Ralf Matthias Bendlin

Eko Nugroho Onggosanusi

Pierre Bertrand

Vikram Chandrasekhar

Tarik Muharemovic

Zukang Shen

Jing Jiang

Tamer Adel Kadous

Brian Francis Johnson

Siddhartha Mallik

Wanlu Sun

Masoumeh Sadeghi

Sandeep Bhadra

Mark Vernon Lane

Michael J Roe

Liang Mei

Hassan Ghozlan

Eko M Onggosanusi

A wireless transmission system included at least one user equipment and a base station. The base station is operable to form a downlink control information block, modulate the downlink control information, precode the modulated downlink control information, and transmit the precoded, modulated downlink control information on at least one demodulation reference signal antenna port to the at least one user equipment. The precoded, modulated downlink control information is mapped to a set of N1 physical resource block pairs in a subframe from an orthogonal frequency division multiplexing symbol T1 to and orthogonal frequency division multiplexing symbol T2.

Physical downlink control channel and physical hybrid automatic repeat request indicator channel enhancements

Embodiments of the invention are directed to a cellular communication network that can determine whether communications between one base station-UE pair may interfere with another UE that is in the same cell or a different cell. The network identifies interference parameters associated with interference signals that may be received by a UE. The interference signals may be generated by the base station itself, such as communications with other UEs, or by a neighboring base station. The base station transmits the interference parameters to the UE. The UE receives the one or more parameters comprising information about signals expected to cause intra-cell or inter-cell interference. The UE then processes received signals using the one or more parameters to suppress the intra-cell or inter-cell interference.

Network signaling for network-assisted interference cancellation and suppression

A transmission point (TP) comprises a processor configured to generate a transmission parameter related to a transmission property of the TP, wherein the transmission parameter comprises at least one of a transmission rank, a beamforming matrix, a transmission power, and an on/off status, and a transmitter coupled to the processor and configured to transmit the transmission parameter as part of a coordinated multi-point (CoMP) scheme. A transmission point (TP) comprises a processor configured to generate a transmission parameter related to a desired transmission property, wherein the transmission parameter comprises at least one of a transmission rank, a beamforming matrix, a transmission power, and an on/off status, and a transmitter coupled to the processor and configured to transmit the transmission parameter as part of a coordinated multi-point (CoMP) scheme.

Inter-point parameter signaling in coordinated multi-point (CoMP) networks

A method for time multiplexing subframes on a serving cell to a user equipment, wherein one set of subframes operate with the legacy LTE transmission format and one set of subframes operate with an evolved transmission format comprising reduced density CRS transmission without a PDCCH control region.

Methods for energy-efficient unicast and multicast transmission in a wireless communication system

Aspects of this disclosure relate to user equipment rate selection. Sum rates can be compared including and excluding a candidate layer. Based on the comparison, the candidate layer can be included in a layer set. Rate selection for user equipments of a cluster can be performed based on the layer set. In certain applications, user equipment rate selection can be performed for multiple clusters of user equipments and network nodes. In such applications, inter-cluster interference can be nulled.

Rate selection for user equipments of cluster

Aspects of this disclosure relate to forming clusters of user equipments and network nodes. A first cluster of first user equipments and first network nodes in a first section can be formed for a time slot. A second cluster of second user equipments and second network nodes in a second section can be formed for the time slot such that the first user equipments are protected from interference associated with the second cluster. During the time slot, the first section has higher priority than the second section. Multiple-input multiple-output wireless communications can occur during the time slot (a) from the first network nodes to the first user equipments and (b) from the second network nodes to the second user equipments.

Clustering in multiple-input multiple-output communication systems

Aspects of this disclosure relate transmitting and/or receiving reference symbols. A first reference symbol includes a symbol and a cyclically shifted portion of the symbol, where the cyclically shifted portion has cyclic shift length. A second reference symbol includes a cyclically shifted version of the first reference symbol that is cyclically shifted relative to the first reference symbol by the cyclic shift length. The first and second reference symbols are transmitted consecutively from at least one antenna.

Reference signal for wireless communication systems

A method of operating a time division duplex (TDD) wireless communication system is disclosed. The method includes establishing communications with a remote transceiver. A subframe configuration including static and flexible subframes is determined and transmitted to the remote transceiver. A channel state information (CSI) report is received from the remote transceiver in response to the subframe configuration.

Method and apparatus for configuration, measurement and reporting of channel state information for LTE TDD with dynamic UL/DL configuration

A method and user equipment for channel state information (CSI) reporting are described. The method receives a channel quality indicator request. The method determines a channel quality indicator based on a CSI reference resource. The method transmits a CSI report that includes the channel quality indicator via a Physical Uplink Control CHannel (PUCCH) on an uplink subframe. The CSI reference resource belongs to a subframe subset for which the CSI report is sent. The CSI reference resource includes overhead of Demodulation Reference Signals according to a corresponding rank report.

CSI reporting

A method of operating a long term evolution (LTE) communication system on a shared frequency spectrum is disclosed. A user equipment (UE) is initialized on an LTE frequency band. A base station (eNB) monitors the shared frequency spectrum to determine if it is BUSY. The eNB transmits to the UE on the shared frequency spectrum if it is not BUSY. The eNB waits for a first time if it is BUSY and directs the UE to vacate the shared frequency spectrum after the first time.

Method and apparatus for transmitting LTE waveforms in shared spectrum by carrier sensing

Carrier aggregation allows concurrent transmission on multiple component carriers (CC) to increase the data rate. A user equipment (UE) device in a cellular network provides periodic or aperiodic channel state information of the DL channel to a base station (eNB) for each of the aggregated CCs. The UE receives two or more reference signals corresponding to two or more aggregated CCs from an eNB. The UE computes a plurality of channel state information (CSI) reports for each of two or more aggregated CCs derived from the two or more reference signals. The UE receives a positive CSI request from the eNB for a CSI report and transmits CSI feedback to the eNB comprising one or more CSI reports selected from the plurality of CSI reports.

CSI reporting in PUSCH for carrier aggregation

Rate selection in multiple-input multiple-output communication systems

Aspects of this disclosure relate receiving a reference symbol from at least one antenna. The reference symbol includes a portion of a first transmitted reference symbol and a portion of a second transmitted reference symbol. The first transmitted reference symbol includes a symbol and a cyclically shifted portion of the symbol having a cyclic shift length. The second transmitted reference symbol includes a cyclically shifted version of the first transmitted reference symbol that is cyclically shifted relative to the first transmitted reference symbol by the cyclic shift length. The reference symbol is processed. In certain embodiments, processing the reference symbol can account for (i) a frame offset between uplink symbols and downlink symbols and (ii) another timing offset between downlink transmission and uplink reception.

Reference signal for wireless communications

A method of operating a wireless communication system is disclosed. The method includes configuring a user equipment (UE) for carrier aggregation with N serving cells, where N is a positive integer. The UE is scheduled to receive downlink data from M of the N serving cells at a first time, where M is a positive integer less than or equal to N. The UE provides uplink control information (UCI) for only the M serving cells.

Growing community of inventors

Houston, TX, United States of America

Anthony Edet Ekpenyong