公开(公告)号：US20240356616A1

公开(公告)日：2024-10-24

申请号：US18429209

申请日：2024-01-31

Applicant: Samsung Electronics Co., Ltd.

Inventor： Vishnu Vardhan Ratnam ,  Hao Chen ,  Abhishek Sehgal ,  Hao-Hsuan Chang ,  Jianzhong Zhang

IPC: H04B7/06

CPC classification number: H04B7/0654 ,  H04B7/0626

Abstract: Methods and apparatuses for WiFi CSI preprocessing for sensing applications are provided. A method of wireless communication performed by a STA comprises: receiving a sequence of frames; obtaining a CSI set, comprising the CSI for each of the frames; determining one or more variations in the CSI set caused by at least one of a device impairment, a synchronization issue, or an unintended signal; performing a preprocessing procedure configured to: correct one or more errors in gain and phase of each CSI of the CSI set caused by at least one of the device impairment or the synchronization issue, and filter at least one variation caused by the unintended signal; and identifying at least one of an outlier or a variation in CSI set that affects a sensing task, and performing at least one preprocessing operation configured to filter the outlier or the variation in CSI set.

公开(公告)号：US12082147B2

公开(公告)日：2024-09-03

申请号：US17460022

申请日：2021-08-27

Applicant: Samsung Electronics Co., Ltd.

Inventor： Rubayet Shafin ,  Vishnu Vardhan Ratnam ,  Hao Chen ,  Yan Xin ,  Jianzhong Zhang

IPC: H04W64/00 ,  G01S5/02 ,  G06N20/00 ,  H04W24/10

CPC classification number: H04W64/006 ,  G01S5/0218 ,  G06N20/00 ,  H04W24/10

Abstract: A method for performing line-of-sight (LoS)/non-line-of-sight (NLoS) filtering includes collecting, from at least one user equipment (UE) operating within a coverage area of a base station, a plurality of measurement reports from the at least one UE, wherein each measurement report of the plurality of measurement reports comprises a measured value of a signal parameter and location information of the at least one UE. The method further includes training a LoS/NLoS classification model on the plurality of measurement reports, obtaining a new measurement report from a UE operating at a first location within the coverage area of the base station and passing the new measurement report from the UE to the trained LoS/NLoS classification model to obtain a LoS/NLoS classification of the first location.

公开(公告)号：US20240276392A1

公开(公告)日：2024-08-15

申请号：US18531598

申请日：2023-12-06

Applicant: Samsung Electronics Co., Ltd.

Inventor： Abhishek Sehgal ,  Hao Chen ,  Boon Loong Ng ,  Vutha Va ,  Vishnu Vardhan Ratnam

IPC: H04W52/24 ,  H04W16/14

CPC classification number: H04W52/243 ,  H04W16/14 ,  H04W84/12

Abstract: Methods and apparatuses for Overlapping Basic Service Set (OBSS) preamble detection (PD) threshold adaptation. A method of wireless communication performed by a station (STA) comprises: determining whether the STA changed an overlapping basic service set (OBSS) packet detection (PD) threshold for spatial reuse (SR); obtaining, based on determining that the STA changed the OBSS PD threshold for SR, feedback information for performance indicators associated with the STA; and updating the OBSS PD threshold for SR based on the feedback information.

公开(公告)号：US12010618B2

公开(公告)日：2024-06-11

申请号：US17662973

申请日：2022-05-11

Applicant: Samsung Electronics Co., Ltd.

Inventor： Rebal Al Jurdi ,  Abhishek Sehgal ,  Hao Chen ,  Boon Loong Ng ,  Yuming Zhu

IPC: H04W52/02 ,  H04B1/7163

CPC classification number: H04W52/0216 ,  H04B1/7163

Abstract: A method includes determining one or more active slots and inactive slots in an ultra-wide band (UWB) ranging round. The method also includes determining multiple silent periods in the ranging round based on an arrangement of the inactive slots. The method also includes determining a target silent period in the ranging round, among the multiple silent periods, to be used for WiFi communication. The method also includes determining multiple target wake time (TWT) parameters such that a TWT session period defined by the TWT parameters overlaps with the target silent period. The method also includes determining one or more second silent periods preceding the target silent period in which the TWT parameters can be negotiated with an access point (AP) for the WiFi communication. The method also includes negotiating the TWT parameters with the AP during the one or more second silent periods.

公开(公告)号：US11864107B2

公开(公告)日：2024-01-02

申请号：US17645953

申请日：2021-12-23

Applicant: Samsung Electronics Co., Ltd.

Inventor： Guanbo Chen ,  Abhishek Sehgal ,  Wenxun Qiu ,  Hao Chen

IPC: H04W52/02 ,  H04W74/08 ,  H04W72/1263

CPC classification number: H04W52/0216 ,  H04W52/0232 ,  H04W72/1263 ,  H04W74/0816

Abstract: Embodiments of the present disclosure provide methods and apparatuses for updating a target wake time (TWT) service period and interval. The apparatuses include a communication device comprising a transceiver and a processor. The transceiver is configured to transmit and receive higher layer data packets in a TWT operation during a time period. The processor is configured to determine, based on PHY data rates during the time period, effective higher layer data rates, estimate an initial data transceiving time based on the effective higher layer data rates and total lengths of the data packets, adjust the initial data transceiving time to obtain a higher layer data transceiving time based on an estimated network congestion level, an estimated re-transmission rate, and a total amount of TWT overhead during the time period, and determine a new TWT service period and interval based on the higher layer data transceiving time.

公开(公告)号：US11777568B2

公开(公告)日：2023-10-03

申请号：US17806068

申请日：2022-06-08

Applicant: Samsung Electronics Co., Ltd.

Inventor： Shiyang Leng ,  Hao Chen ,  Ahmed Atef Ibrahim Ibrahim ,  Namjeong Lee ,  Sooyoung Hur

IPC: H04B7/0456 ,  H04L1/00

CPC classification number: H04B7/0486 ,  H04L1/0009

Abstract: Apparatuses and methods for precoding matrix indicator (PMI)-based data beam nulling with a channel state information (CSI) report. An apparatus includes a transceiver configured to communicate via a wired or wireless communication medium and a processor coupled to the transceiver. The processor is configured to identify restricted PMI beams in a nulling direction for supported ranks; receive, via the transceiver from a user equipment (UE), a CSI report including a rank, a PMI, and channel quality indicator (CQI) feedback; and determine whether the reported PMI is restricted. The processor is further configured to select an alternative PMI among a number of unrestricted PMIs for the reported rank; boost a reported CQI if a reduced transmit power is configured; and select a modulation coding scheme (MCS) and generate a precoder for a data beam based on at least one of: the CSI report, the alternative PMI, and the boosted CQI.

公开(公告)号：US20230052415A1

公开(公告)日：2023-02-16

申请号：US17658011

申请日：2022-04-05

Applicant: Samsung Electronics Co., Ltd.

Inventor： Shiyang Leng ,  Hao Chen ,  Namjeong Lee ,  Sooyoung Hur

IPC: H04B7/06 ,  H04L5/00

Abstract: An apparatus in a wireless communication system is configured to perform a method for directional beam nulling of SRS-based data beams. A base station (BS) includes a transceiver and a processor. The processor is configured to transmit a data beam to at least one user equipment (UE). The processor is also configured to configure the data beam to have a null area in a direction of a satellite earth station (ES), the null area defining a space within a coverage area of the data beam in which a signal from the data beam is suppressed. The data beam is configured by: generating one or more steering vectors to the ES; obtaining a UE channel matrix via a sounding reference signal (SRS) and determining a rank value; and generating a beamforming precoder configured to directional null the data beam in the direction of the ES.

公开(公告)号：US20220417856A1

公开(公告)日：2022-12-29

申请号：US17840324

申请日：2022-06-14

Applicant: Samsung Electronics Co., Ltd.

Inventor： Rebal Al Jurdi ,  Hao Chen ,  Khuong N. Nguyen ,  Abhishek Sehgal ,  Boon Loong Ng

IPC: H04W52/02 ,  H04B1/7163

Abstract: A method includes determining one or more active slots and inactive slots in an ultra-wide band (UWB) ranging round. The method also includes determining multiple UWB silent periods in the ranging round based on an arrangement of the inactive slots. The method also includes determining a sleep-wake-up schedule that aligns with at least one selected silent period of the multiple UWB silent periods in the ranging round, the sleep-wake-up schedule to be used for Wi-Fi communication. The method also includes waking up a Wi-Fi station (STA) for the Wi-Fi communication during the at least one selected silent period, then going back to sleep according to the sleep-wake-up schedule.

公开(公告)号：US11516051B2

公开(公告)日：2022-11-29

申请号：US16270486

申请日：2019-02-07

Applicant: Samsung Electronics Co., Ltd.

Inventor： Vikram Chandrasekhar ,  Jianzhong Zhang ,  Saidhiraj Amuru ,  Yeqing Hu ,  Hao Chen

IPC: H04L25/02 ,  G06N3/08 ,  G06N20/00 ,  G06N3/04

Abstract: An apparatus for performing a wireless communication includes a communication interface configured to measure uplink (UL) Sounding Reference Signals (SRSs) transmitted from a mobile client device, and at least one processor configured to buffer a number of uplink (UL) SRS measurements derived from UL SRS transmissions of the mobile client device, the number of UL SRS measurements exceeding a threshold, extract features from UL SRS measurements, obtain a machine learning (ML) classifier for determining a category to be used for estimating mobility associated with the mobile client device, and determine the category of the mobile client device by applying the extracted features to the ML classifier. Methods and apparatus extract the features of either a set of power spectrum density measurements or a set of pre-processed frequency domain real and imaginary portions of UL SRS measurements and feed the features to an AI classifier for UE speed estimation.

公开(公告)号：US11284473B2

公开(公告)日：2022-03-22

申请号：US16520152

申请日：2019-07-23

Applicant: Samsung Electronics Co., Ltd.

Inventor： Wenxun Qiu ,  Hao Chen ,  Matthew Tonnemacher ,  In-sick Jung ,  Jihoon Sung ,  Khuong N. Nguyen ,  Abhishek Sehgal ,  Jianhua Mo ,  Jianzhong Zhang ,  Junyeop Jung ,  John Wensowitch ,  Eric Johnson ,  Namjoon Park

IPC: H04W76/38 ,  H04W76/10 ,  H04W24/08 ,  H04W76/25 ,  H04L67/50

Abstract: A method of an electronic device for a connection management is provided. The method comprises: establishing a communication link with an access point (AP); receiving a triggering indication based on link information measured by the electronic device; determining a quality of the communication link between the electronic device and the AP based on the received triggering indication; comparing, based on the determined quality of the communication link, at least two Q values fetched from a Q table that is determined according to context in which in the electronic device is being used; setting a quantized aggressive index (QAI) value based on the compared at least two Q values; and generating a disconnection command based on the QAI value, wherein the disconnection command is a physical disconnection command or a virtual disconnection command of the communication link between the electronic device and the AP.