公开(公告)号：US20240106565A1

公开(公告)日：2024-03-28

申请号：US18256043

申请日：2021-02-10

Applicant: QUALCOMM Incorporated

Inventor： Kangqi LIU ,  Ruiming ZHENG ,  Changlong XU ,  Liangming WU ,  Kexin XIAO ,  Jian LI ,  Hao XU ,  Wei LIU

IPC: H04L1/00 ,  H04W4/44 ,  H04W36/08

CPC classification number: H04L1/0009 ,  H04L1/0075 ,  H04W4/44 ,  H04W36/08

Abstract: Apparatus, methods, and computer-readable media for network coding for handover are disclosed herein. A base station (BS) transmits a first group of encoded packets to a first road side unit (RSU) over a first radio access network (RAN) interface. The BS initiates a handover procedure between the first RSU and a second RSU. The BS receives, from the first RSU, a release acknowledgment associated with the handover procedure and feedback associated with the first group of encoded packets. The BS transmits network coding level information to the second RSU over a second RAN interface based on the feedback. The network coding level information indicates a number of missing encoded packets within the first group of encoded packets for the second RSU to transmit to the UE. The BS transmits, to the UE, a second group of encoded packets associated with the number of missing encoded packets at the second RSU.

公开(公告)号：US20240049119A1

公开(公告)日：2024-02-08

申请号：US18256034

申请日：2021-02-05

Applicant: QUALCOMM Incorporated

Inventor： Hao ZHANG ,  Aimin SHANG ,  Jian LI

IPC: H04W48/16

CPC classification number: H04W48/16 ,  H04W84/042

Abstract: Apparatus, methods, and computer-readable media for improvements to public land mobile network (PLMN) search at user equipment (UE) switch-on for wireless communications are disclosed herein. A user equipment (UE) may determine to request for a first service associated with a first radio access technology (RAT). The UE may determine whether an identifier of a first registered public land mobile network (RPLMN) associated with the first RAT is present in the UE. The UE may camp on a first cell of the first RPLMN when the identifier of the first RPLMN is present in the UE.

公开(公告)号：US20240023139A1

公开(公告)日：2024-01-18

申请号：US18256621

申请日：2021-02-02

Applicant: QUALCOMM INCORPORATED

Inventor： Kangqi LIU ,  Ruiming ZHENG ,  Changlong XU ,  Liangming WU ,  Jian LI ,  Kexin XIAO ,  Hao XU ,  Wei LIU

IPC: H04W72/25 ,  H04L1/00

CPC classification number: H04W72/25 ,  H04L1/0076 ,  H04L2001/0097

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a base station, encoded packets that are encoded using network coding. The encoded packets may be associated with source packets that represent a data set. The UE may attempt to recover the source packets from the encoded packets received from the base station. Upon failing to recover the source packets, the UE may transmit, over a sidelink channel, a message requesting sidelink assistance in recovering the source packets.

公开(公告)号：US20230412195A1

公开(公告)日：2023-12-21

申请号：US18461809

申请日：2023-09-06

Applicant: QUALCOMM Incorporated

Inventor： Changlong XU ,  Jian LI ,  Jilei HOU ,  Chao WEI

IPC: H03M13/13 ,  H04B17/336 ,  H03M13/35 ,  H04L1/00 ,  H04L1/1812

CPC classification number: H03M13/13 ,  H04B17/336 ,  H03M13/353 ,  H04L1/0003 ,  H04L1/0013 ,  H04L1/1812

Abstract: Methods and apparatus for constructing polar codes are provided. A transmitter determines at least one set of parameters corresponding to data to be transmitted, and a set of sorting indices corresponding to bits of the data to be transmitted based on the set of parameters, the set of sorting indices indicating a position set of the bits to be transmitted. The transmitter polar encodes the data based at least on the set of parameters and the set of sorting indices to generate a coded block of the data, and transmits the coded block of the data.

公开(公告)号：US20230291420A1

公开(公告)日：2023-09-14

申请号：US18001251

申请日：2020-06-11

Applicant: QUALCOMM INCORPORATED

Inventor： Kangqi LIU ,  Jian LI ,  Changlong XU ,  Liangming WU ,  Hao XU

IPC: H03M13/37 ,  H03M13/00 ,  H04L1/00

CPC classification number: H03M13/3761 ,  H03M13/6306 ,  H04L1/0041

Abstract: Methods, systems, and devices for wireless communications are described. An encoding device (e.g., a base station or user equipment (UE)) may communicate, with a decoding device (e.g., a UE or base station), an indication of a set of encoding symbol identifiers via a control channel. The encoding device may transmit a set of packets associated with a rateless code via a data channel, where each of the set of packets includes an encoding symbol. The decoding device may decode the set of encoding symbols based on the set of encoding symbol identifiers.

公开(公告)号：US20210281359A1

公开(公告)日：2021-09-09

申请号：US16318093

申请日：2016-07-27

Applicant: QUALCOMM Incorporated

Inventor： Changlong XU ,  Jian LI ,  Chao WEI ,  Jilei HOU

IPC: H04L1/00 ,  H04L5/00

Abstract: Certain aspects of the present disclosure relate to techniques and apparatus for design of hybrid automatic repeat request (HARQ) feedback bits. The method generally includes obtaining a payload to be transmitted, partitioning the payload into a plurality of blocks, and partitioning each block of the plurality of blocks into a plurality of sections. The method also includes deriving redundancy check information for each section of the plurality of sections, and generating a plurality of codewords, each comprising a block of the plurality of blocks and the redundancy check information for each section of the block, wherein a location of each of the sections in the codewords is determined based on an error rate corresponding to each of the sections.

公开(公告)号：US20210203450A1

公开(公告)日：2021-07-01

申请号：US16078341

申请日：2016-11-04

Applicant: QUALCOMM Incorporated

Inventor： Changlong XU ,  Jian LI ,  Jilei HOU ,  Neng WANG ,  Chao WEI

IPC: H04L1/18 ,  H03M13/13

Abstract: For communication utilizing polar codes, a hybrid automatic repeat request (HARQ) algorithm is provided that takes advantage of the benefits of chase combining HARQ (HARQ-CC) and incremental redundancy HARQ (HARQ-IR), by selecting one or the other in accordance with a code rate of the first transmission. In some examples, the HARQ algorithm utilizes HARQ-IR when the code rate in the first transmission is greater than a code rate threshold, and utilizes HARQ-CC when the code rate in the first transmission is less than the code rate threshold.

公开(公告)号：US20210105087A1

公开(公告)日：2021-04-08

申请号：US16464576

申请日：2017-06-02

Applicant: QUALCOMM Incorporated

Inventor： Changlong XU ,  Jian LI ,  Jilei HOU

IPC: H04L1/00 ,  H04L1/18

Abstract: Methods and apparatuses for wireless communications are described. In an aspect, a method and apparatus may include determining that a second transmission is decoded incorrectly in response to a first received indication on a communication channel. The method and apparatus may further include transmitting, on the communication channel, a third transmission and a fourth transmission based on a determination that the second transmission is decoded incorrectly, wherein the third transmission corresponds to a coded bit set of the third transmission including a first group of information bits of a coded bit set of a first transmission and a second group of information bits of a coded bit set of the second transmission and the fourth transmission corresponds to a coded bit set of the fourth transmission including a combination of the coded bit sets of the first transmission, the second transmission, and the third transmission.

公开(公告)号：US20200351029A1

公开(公告)日：2020-11-05

申请号：US16758549

申请日：2018-10-02

Applicant: Jian LI ,  Changlong XU ,  Kai CHEN ,  Liangming WU ,  Jing JIANG ,  Hao XU ,  QUALCOMM Incorporated

Inventor： Jian LI ,  Changlong XU ,  Kai CHEN ,  Liangming WU ,  Jing JIANG ,  Hao XU

IPC: H04L1/18 ,  H04L1/00

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may perform a first transmission of a communication that is encoded using a polar coding technique; and perform at least one retransmission of the communication, wherein more resources are allocated for the at least one retransmission than for the first transmission, and wherein the at least one retransmission includes an incremental redundancy version of the communication and a version of the communication for Chase combination. Numerous other aspects are provided.

公开(公告)号：US20200274644A1

公开(公告)日：2020-08-27

申请号：US16874264

申请日：2020-05-14

Applicant: QUALCOMM Incorporated

Inventor： Changlong XU ,  Jian LI ,  Jilei HOU ,  Neng WANG

IPC: H04L1/00 ,  H03M13/13 ,  H03M13/00

Abstract: Polar codes may be generated with a variable block length utilizing puncturing. Some puncturing schemes consider punctured bits as unknown bits, and set the log likelihood ratio (LLR) for those bits to zero; while other puncturing schemes consider punctured bits as known bits, and set the LLR for those bits to infinity. Each of these puncturing schemes has been observed to provide benefits over the other under different circumstances, especially corresponding to different coding rates or different signal to noise ratio (SNR). According to aspects of the present disclosure, both puncturing schemes are compared, and the puncturing scheme resulting in the better performance is utilized for transmission.