公开(公告)号：US11082099B2

公开(公告)日：2021-08-03

申请号：US16716210

申请日：2019-12-16

Applicant: Texas Instruments Incorporated

Inventor： Runhua Chen ,  Eko Onggosanusi ,  Ralf M. Bendlin

IPC: H04B7/0456 ,  H04B7/06 ,  H04L5/00 ,  H04W72/04 ,  H04W36/00 ,  H04B7/0417

Abstract: Channel state information (CSI) feedback in a wireless communication system is disclosed. User equipment transmits a CSI feedback signal via a Physical Uplink Control Channel (PUCCH). If the UE is configured in a first feedback mode, the CSI comprises a first report jointly coding a Rank Indicator (RI) and a first precoding matrix indicator (PMI1), and a second report coding Channel Quality Indicator (CQI) and a second precoding matrix indicator (PMI2). If the UE is configured in a second feedback mode, the CSI comprises a first report coding RI, and a second report coding CQI, PMI1 and PMI2. The jointly coded RI and PMI1 employs codebook sub-sampling, and the jointly coding PMI1, PMI2 and CQI employs codebook sub-sampling.

公开(公告)号：US20200314691A1

公开(公告)日：2020-10-01

申请号：US16901932

申请日：2020-06-15

Applicant: Texas Instruments Incorporated

Inventor： Runhua Chen ,  Anthony E. Ekpenyong

IPC: H04W28/06 ,  H04L1/06 ,  H04L1/18 ,  H04W72/04 ,  H04L5/00

Abstract: A method and apparatus of wireless communication between a base station and at least one user equipment. The method includes: transmitting an enhanced physical downlink control channel from the base station to the at least one user equipment using a demodulation reference signal antenna port; transmitting message from the base station to the at least one user equipment which is scheduled by the enhanced physical downlink control channel; receiving the message at the at least one user equipment; determining at the at least one user equipment whether the message was correctly received; and transmitting an ACK/NAK signal on an ACK/NAK resource determined from the enhanced physical downlink control channel from the at least one user equipment to the base station indicating whether the message was correctly received by the at least one user.

公开(公告)号：US10785758B2

公开(公告)日：2020-09-22

申请号：US15070835

申请日：2016-03-15

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Runhua Chen

IPC: H04W72/04 ,  H04W76/27 ,  H04B7/024 ,  H04W72/12 ,  H04W72/08 ,  H04L1/00 ,  H04W28/22

Abstract: Systems and methods for fall-back rate-matching and timing for user equipment (UE) configured for downlink (DL) Coordinated Multi-Point Transmission (CoMP) are disclosed. In one embodiment, when a UE configured in DL CoMP receives a fall-back transmission, PDSCH is rate-matched around the serving cell CRS. In an alternative embodiment, when a UE configured in DL CoMP receives a fall-back transmission, PDSCH is rate-matched or uses timing around one of the cell-specific reference symbol (CRS) resource element (RE) set indicated by RRC-higher layer signaling. For example, PDSCH may be rate-matched or use timing around the first RRC higher layer configured CRS RE set.

公开(公告)号：US10348432B2

公开(公告)日：2019-07-09

申请号：US14285759

申请日：2014-05-23

Applicant: Texas Instruments Incorporated

Inventor： Runhua Chen ,  Eko N. Onggosanusi ,  Ralf Matthias Bendlin ,  Anthony Edet Ekpenyong

IPC: H04J11/00

Abstract: 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.

公开(公告)号：US10033447B2

公开(公告)日：2018-07-24

申请号：US14613176

申请日：2015-02-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eko Onggosanusi ,  Vikram Chandrasekhar ,  Runhua Chen

IPC: H04L27/10 ,  H04B7/0456 ,  H04B7/024 ,  H04B7/0452 ,  H04W72/12 ,  H04B7/0413 ,  H04B7/06 ,  H04B7/10

Abstract: A base station selects a subset of at least one geographically separated antennas for each of the plurality of user equipments. The base station forms at least layer of data stream including modulated symbols, precodes the data stream via multiplication with the NT-by-N precoding matrix where N is the number of said layers and NT is the number of transmit antenna elements and transmits the precoded layers of data stream to the user equipment via the selected geographically separated antennas. The base station signals the subset of the plurality of geographically separated antennas via higher layer Radio Resource Control or via a down link grant mechanism. The base station optionally does not signal the subset of the plurality of geographically separated antennas to the corresponding mobile user equipment.

公开(公告)号：US20180083757A1

公开(公告)日：2018-03-22

申请号：US15809846

申请日：2017-11-10

Applicant: Texas Instruments Incorporated

Inventor： Runhua Chen ,  Anthony Edet Ekpenyong

IPC: H04L5/00 ,  H04L1/00 ,  H04W72/04 ,  H04W76/00 ,  H04L5/14 ,  H04W72/08 ,  H04W72/12 ,  H04W28/02

CPC classification number: H04L5/0073 ,  H04L1/00 ,  H04L1/0023 ,  H04L5/0053 ,  H04L5/0091 ,  H04L5/14 ,  H04L5/1469 ,  H04W28/0231 ,  H04W72/0413 ,  H04W72/08 ,  H04W72/085 ,  H04W72/1226 ,  H04W72/1231 ,  H04W76/00

Abstract: 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.

公开(公告)号：US20180007672A1

公开(公告)日：2018-01-04

申请号：US15707741

申请日：2017-09-18

Applicant: Texas Instruments Incorporated

Inventor： Runhua Chen ,  Ralf Matthias Bendlin

IPC: H04W72/04 ,  H04L1/00 ,  H04W72/00 ,  H04W28/26

CPC classification number: H04W72/042 ,  H04L1/0046 ,  H04W28/26 ,  H04W72/00

Abstract: A system and method for providing both localized and distributed transmission modes for EPDCCH is disclosed, where one EPDCCH comprises of one or multiple CCEs. Localized versus distributed transmission may be defined in terms of the EPDCCH to CCE resource mapping. In a localized transmission CCEs are restricted to be contained within one PRB. In a distributed transmission a CCE spans over multiple PRBs. A UE can be configured to either receive the EPDCCH only in localized or only in distributed transmissions. A UE can also be configured to expect EPDCCH transmissions in both localized and distributed transmissions. In each PRB configured by the higher layer as an EPDCCH resource, 24 REs that may be used for any DMRS transmission are always reserved and not used for EPDCCH transmission.

公开(公告)号：US20170373733A1

公开(公告)日：2017-12-28

申请号：US15698015

申请日：2017-09-07

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eko Onggosanusi ,  Runhua Chen ,  Ralf Bendlin

IPC: H04B7/0456 ,  H04B7/04 ,  H04B7/0417 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/046 ,  H04B7/0469 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/0626 ,  H04B7/0639

Abstract: Channel state information (CSI) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (PMI) feedback, wherein the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook. In one embodiment, the first codebook comprises at least a first precoding matrix constructed with a first group of adjacent Discrete-Fourier-Transform (DFT) vectors. In another embodiment, the first codebook comprises at least a second precoding matrix constructed with a second group of uniformly distributed non-adjacent DFT vectors. In yet another embodiment, the first codebook comprises at least a first precoding matrix and a second precoding matrix, where said first precoding matrix is constructed with a first group of adjacent DFT vectors, and said second precoding matrix is constructed with a second group of uniformly distributed non-adjacent DFT vectors.

公开(公告)号：US09780850B2

公开(公告)日：2017-10-03

申请号：US15132024

申请日：2016-04-18

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eko Onggosanusi ,  Runhua Chen ,  Ralf Bendlin

IPC: H04B7/04 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/0417

CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/046 ,  H04B7/0469 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/0626 ,  H04B7/0639

Abstract: Channel state information (CSI) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (PMI) feedback, wherein the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook. In one embodiment, the first codebook comprises at least a first precoding matrix constructed with a first group of adjacent Discrete-Fourier-Transform (DFT) vectors. In another embodiment, the first codebook comprises at least a second precoding matrix constructed with a second group of uniformly distributed non-adjacent DFT vectors. In yet another embodiment, the first codebook comprises at least a first precoding matrix and a second precoding matrix, where said first precoding matrix is constructed with a first group of adjacent DFT vectors, and said second precoding matrix is constructed with a second group of uniformly distributed non-adjacent DFT vectors.

公开(公告)号：US09769806B2

公开(公告)日：2017-09-19

申请号：US13743202

申请日：2013-01-16

Applicant: Texas Instruments Incorporated

Inventor： Runhua Chen ,  Ralf Matthias Bendlin

IPC: H04W72/04 ,  H04L1/00 ,  H04W28/26 ,  H04W72/00

CPC classification number: H04W72/042 ,  H04L1/0046 ,  H04W28/26 ,  H04W72/00

Abstract: A system and method for providing both localized and distributed transmission modes for EPDCCH is disclosed, where one EPDCCH comprises of one or multiple CCEs. Localized versus distributed transmission may be defined in terms of the EPDCCH to CCE resource mapping. In a localized transmission CCEs are restricted to be contained within one PRB. In a distributed transmission a CCE spans over multiple PRBs. A UE can be configured to either receive the EPDCCH only in localized or only in distributed transmissions. A UE can also be configured to expect EPDCCH transmissions in both localized and distributed transmissions. In each PRB configured by the higher layer as an EPDCCH resource, 24 REs that may be used for any DMRS transmission are always reserved and not used for EPDCCH transmission.