公开(公告)号：US11616663B2

公开(公告)日：2023-03-28

申请号：US17143130

申请日：2021-01-06

Applicant: Samsung Electronics Co., Ltd.

Inventor： Rui Wang ,  Yang Li ,  Junmo Sung ,  Yeqing Hu ,  Jianzhong Zhang

IPC: H04L25/02 ,  H04W24/08 ,  H04B7/0452

Abstract: Methods and apparatuses in a wireless communication system. A method of operating a base station (BS) includes receiving information of uplink transmissions; storing the received information; performing, based on the received information, channel parameter tracking operations to generate channel parameters, wherein the channel parameter tracking operations are configured with different configuration parameters; and performing, based on the channel parameters, a channel coefficient prediction operation to generate channel state information (CSI).

公开(公告)号：US20230082795A1

公开(公告)日：2023-03-16

申请号：US17932274

申请日：2022-09-14

Applicant: Samsung Electronics Co., Ltd.

Inventor： Tiexing Wang ,  Yeqing Hu ,  Yang Li ,  Rui Wang ,  Junmo Sung ,  Jianzhong Zhang

IPC: H04L5/00 ,  H04L25/02 ,  H04L27/26

Abstract: A method includes storing multiple signals received from a user equipment (UE) in a queue. The method also includes estimating a sounding reference signal (SRS) signal-to-noise-ratio (SNR) and determining a filtered SNR based on the received signals. The method also includes computing one or more features based on the filtered SNR and at least some of the received signals in the queue. The method also includes determining (i) a channel condition of the UE and (ii) a speed range of the UE based on the one or more computed features, wherein the channel condition of the UE comprises line-of-sight (LoS) or non-line-of-sight (NLoS). The method also includes determining a transmission configuration based on the channel condition of the UE and the speed range of the UE.

公开(公告)号：US11516689B2

公开(公告)日：2022-11-29

申请号：US17129797

申请日：2020-12-21

Applicant: Samsung Electronics Co., Ltd.

Inventor： Yeqing Hu ,  Yang Li ,  Tiexing Wang ,  Junmo Sung ,  Rui Wang ,  Jianzhong Zhang

IPC: H04L12/00 ,  H04W24/10 ,  H04W24/08

Abstract: A method for operating a base station comprises receiving channel information from a plurality of UEs; determining, based on the channel information, one or more UEs on which to base a channel prediction; computing a first set of metrics and a second set of metrics corresponding to the plurality of UEs, wherein computing the first set of metrics has a lower complexity than computing the second set of metrics; performing a selection process on the plurality of UEs based on the first and second set of metrics associated with the plurality of UEs; selecting a first subset of UEs from the plurality of UEs based on a first set of metrics; selecting, from the first subset, a second subset of UEs based on a second set of metrics; and performing the channel prediction based on the second subset of UEs.

公开(公告)号：US20220271852A1

公开(公告)日：2022-08-25

申请号：US17481048

申请日：2021-09-21

Applicant: Samsung Electronics Co., Ltd.

Inventor： Yeqing Hu ,  Yang Li ,  Rui Wang ,  Junmo Sung ,  Tiexing Wang ,  Jianzhong Zhang

IPC: H04B17/391

Abstract: Methods and apparatuses for a BS in a communication system. The method comprises: identifying antenna groups; identifying channel coefficients for each of the antenna groups to perform a channel tracking and prediction operation; receiving, from a user equipment (UE), an uplink signal to perform the channel tracking and prediction operation; and performing, based at least in part on the received uplink signal, a channel coefficient tracking operation for the channel coefficients of the antenna groups, respectively, the channel coefficient tracking operation including a channel subspace parameter tracking operation and a subspace coefficient tracking operation.

公开(公告)号：US11581959B2

公开(公告)日：2023-02-14

申请号：US17188934

申请日：2021-03-01

Applicant: Samsung Electronics Co., Ltd.

Inventor： Yang Li ,  Junmo Sung ,  Rui Wang ,  Yeqing Hu

IPC: H04W48/16 ,  H04B17/18 ,  H04B17/10 ,  H04B17/12 ,  H04W80/02 ,  H04B17/26 ,  H04W72/04 ,  H04W56/00 ,  H04L25/02

Abstract: A base station (UE) is configured to perform a computer-implemented method for antenna fault detection and correction. The computer-implemented method includes acquiring one or more sounding reference signals (SRSs) received from at least one gNB antenna; detecting an antenna failure based on the one or more SRSs; estimating a noise power based on the antenna failure and a history of received SRSs; detecting a missing SRS based on the noise power and the history of received SRSs; and handling the missing SRS. Handling the missing SRS is based on performing at least one of: replacing an SRS measurement with a predicted SRS value for the missing SRS when the predicted SRS is available; or avoiding use of the missing SRS in a sequential SRS prediction when the predicted SRS is unavailable.

公开(公告)号：US20220278762A1

公开(公告)日：2022-09-01

申请号：US17541160

申请日：2021-12-02

Applicant: Samsung Electronics Co., Ltd.

Inventor： Rui Wang ,  Yang Li ,  Yeqing Hu ,  Junmo Sung ,  Tiexing Wang ,  Jianzhong Zhang

IPC: H04B17/373 ,  H04B7/06

Abstract: Methods and apparatuses for a channel estimation and prediction operation in a wireless communication systems. A method of a BS comprises: receiving an SRS; partitioning, based on a partition policy, a frequency band of the SRS into sub-bandwidths in a frequency domain; generating, based on previously stored CSI in memory and the partition policy, a set of chunks corresponding to respective sub-bandwidths; performing CHPD operations corresponding to the respective sub-bandwidths to generate channel parameters, wherein different CHPD operations are applied to the respective sub-bandwidths; combining the channel parameters predicted from the respective sub-bandwidths in the frequency domain; and performing, based on the combined channel parameters, a channel estimation and prediction operation.

公开(公告)号：US11552837B2

公开(公告)日：2023-01-10

申请号：US17143957

申请日：2021-01-07

Applicant: Samsung Electronics Co., Ltd.

Inventor： Junmo Sung ,  Yang Li ,  Rui Wang ,  Yeqing Hu ,  Jin Yuan ,  Jianzhong Zhang

IPC: H04L27/26 ,  H04L25/02 ,  H04L5/00 ,  H04W72/04

Abstract: Methods and apparatuses in a wireless communication system. A method of operating a base station (BS) includes receiving a set of uplink signals; estimating, based on a subset of the set of uplink signals, uplink channels; estimating a timing offset (TO) and a frequency offset (FO) for a subset of the estimated uplink channels; compensating, based on the estimated TO and FO, the subset of the estimated uplink channels to generate TO and FO compensated uplink channel estimates; and generating channel prediction information based on the compensated subset of the estimated uplink channels.

公开(公告)号：US20200099434A1

公开(公告)日：2020-03-26

申请号：US16583142

申请日：2019-09-25

Applicant: Samsung Electronics Co., Ltd.

Inventor： Rui Wang ,  Junmo Sung ,  Jianzhong Zhang ,  Young-Han Nam ,  Shouvik Ganguly

IPC: H04B7/06 ,  H04B7/0452

Abstract: A method of a base station (BS) for channel state information (CSI) estimation in a wireless communication system is provided. The method of BS comprises: receiving, from a user equipment (UE), a sounding reference signal (SRS) for the CSI estimation; determining whether the received SRS is measurable for the CSI estimation; initializing a set of uplink parameters based on a result of the determination; updating the set of uplink parameters based on SRS history stored in a buffer; and performing, using a channel prediction model and channel reciprocity, the downlink CSI estimation based on the updated parameters.

公开(公告)号：US11683712B2

公开(公告)日：2023-06-20

申请号：US17348621

申请日：2021-06-15

Applicant: Samsung Electronics Co., Ltd.

Inventor： Rui Wang ,  Yang Li ,  Junmo Sung ,  Yeqing Hu ,  Jianzhong Zhang

IPC: H04W24/10 ,  H04L5/00 ,  H04B17/373

CPC classification number: H04W24/10 ,  H04B17/373 ,  H04L5/0053

Abstract: Methods and apparatuses for hybrid hierarchical parameter tracking for CSI estimation in a wireless communication system. The methods and apparatuses include receiving uplink signals comprising a channel state information (CSI) report or a sounding reference signal (SRS); performing a channel parameter tracking operation to determine channel parameters that change less than a first threshold amount based on the received uplink signals; performing a channel parameter prediction operation to determine the channel parameters that change greater than a second threshold amount on an output of the channel parameter tracking operation; and performing a channel prediction operation for downlink channels based on an output of the channel parameter tracking operation and the channel parameter prediction operation.

公开(公告)号：US20220022079A1

公开(公告)日：2022-01-20

申请号：US17348621

申请日：2021-06-15

Applicant: Samsung Electronics Co., Ltd.

Inventor： Rui Wang ,  Yang Li ,  Junmo Sung ,  Yeqing Hu ,  Jianzhong Zhang

IPC: H04W24/10 ,  H04B17/373 ,  H04L5/00

Abstract: Methods and apparatuses for hybrid hierarchical parameter tracking for CSI estimation in a wireless communication system. The methods and apparatuses include receiving uplink signals comprising a channel state information (CSI) report or a sounding reference signal (SRS); performing a channel parameter tracking operation to determine channel parameters that change less than a first threshold amount based on the received uplink signals; performing a channel parameter prediction operation to determine the channel parameters that change greater than a second threshold amount on an output of the channel parameter tracking operation; and performing a channel prediction operation for downlink channels based on an output of the channel parameter tracking operation and the channel parameter prediction operation.