公开(公告)号：US10224966B2

公开(公告)日：2019-03-05

申请号：US15851303

申请日：2017-12-21

Applicant: QUALCOMM Incorporated

Inventor： Jian Li ,  Changlong Xu ,  Chao Wei ,  Jilei Hou ,  Jing Jiang

IPC: G06F11/10 ,  H03M13/29 ,  H03M13/00 ,  H03M13/15

Abstract: Methods, systems, and devices for wireless communication are described that support channel selection for parity bits in polar coding techniques. In some cases, an encoder or decoder of a wireless device may assign information bits, frozen bits, and parity check bits to polar channels of an encoder or decoder based on reliability metrics. The information bits may initially be assigned and based on a channel index of the first information bit, the parity check bits may be assigned to channels having higher channel indices than the first information bit. After assignment, the bits may be encoded or decoded.

公开(公告)号：US10142060B2

公开(公告)日：2018-11-27

申请号：US15905243

申请日：2018-02-26

Applicant: QUALCOMM INCORPORATED

Inventor： Changlong Xu ,  Jing Jiang ,  Yang Yang ,  Gabi Sarkis

IPC: H03M13/00 ,  H04L1/00

Abstract: Polar encoding using two or more concatenated cyclic redundancy check (CRC) data values may enhance CRC-aided successive cancellation list decoding in a communication system. A polar encoding method may include determining first CRC data from source data, combining the source data and the first CRC data to form first combined data, determining second CRC data from the first combined data, and combining the source data, the first CRC data, and the second CRC data to form second combined data.

公开(公告)号：US20160049962A1

公开(公告)日：2016-02-18

申请号：US14779708

申请日：2013-04-25

Applicant: LI, Jian ,  XUE, Yisheng ,  HUANG, Yin ,  XU, Changlong ,  HOU, Jilei ,  QUALCOMM INCORPORATED

Inventor： Jian Li ,  Ylsheng Xue ,  Yin Huang ,  Changlong Xu ,  Jilei Hou

IPC: H03M13/11 ,  H03M13/00

CPC classification number: H03M13/1174 ,  H03M13/1102 ,  H03M13/611 ,  H03M13/616

Abstract: A method of data encoding is disclosed. A communications device receives a set of information bits to be encoded into a codeword (c), which includes the set of information bits and a set of parity bits. A first bit value is assigned to a first parity bit in the set of parity bits. The remaining parity bits are then encoded based, at least in part, on the first bit value assigned to the first parity bit. The device may encode the remaining parity bits using the set of information bits and a parity check matrix (H) for a low density parity check (LDPC) code. The device may also generate a new parity check matrix (H0) based on linearly independent rows of the parity check matrix H, and iteratively evaluate each of the remaining parity bits based on the equation: H0c=0. The device may then determine whether the encoded codeword c is a valid codeword given the LDPC code, and change one or more bit values of the codeword if c is not a valid codeword.

Abstract translation: 公开了一种数据编码方法。 通信设备接收要编码的一组信息比特的码字（c），其包括该组信息比特和一组奇偶校验位。 第一比特值被分配给奇偶校验位集合中的第一奇偶校验位。 然后，至少部分地基于分配给第一奇偶校验位的第一比特值来编码剩余的奇偶校验位。 该装置可以使用一组信息比特和用于低密度奇偶校验（LDPC）码的奇偶校验矩阵（H））来编码剩余的奇偶校验比特。 该装置还可以基于奇偶校验矩阵H的线性独立行生成新的奇偶校验矩阵（H0），并且基于以下等式迭代地评估剩余奇偶校验位中的每一个：H0c = 0。 然后，设备可以确定编码码字c是否是给定LDPC码的有效码字，并且如果c不是有效码字，则改变码字的一个或多个比特值。

公开(公告)号：US20150372695A1

公开(公告)日：2015-12-24

申请号：US14766740

申请日：2013-03-14

Applicant: Jian LI ,  Changlong XU ,  Yisheng XUE ,  Jilei HOU ,  Yin HUANG ,  QUALCOMM INCORPORATED

Inventor： Jian Li ,  Changlong Xu ,  Yisheng Xue ,  Jilei Hou ,  Yin Huang

IPC: H03M13/11 ,  H04L1/00

CPC classification number: H03M13/1131 ,  H04L1/0045 ,  H04L1/005 ,  H04L1/0057

Abstract: A method of error correction using low density parity check (LDPC) codes is disclosed. A communications device receives a codeword and detects one or more bit errors in the received codeword using an LDPC code. The device then generates a corrected codeword based, at least in part, on a set of unsatisfied check nodes of the LDPC code. The device may determine that the one or more bit errors are associated with an absorption set of the LDPC code. The device may also determine a plurality of candidate codewords based on the set of unsatisfied check node and select the corrected codeword from the plurality of candidate codewords. Each of the plurality of candidate codewords may represent a valid codeword associated with the LDPC code.

Abstract translation: 公开了一种使用低密度奇偶校验（LDPC）码的纠错方法。 通信设备接收码字，并使用LDPC码检测接收到的码字中的一个或多个比特错误。 然后，该设备至少部分地基于LDPC码的一组不满足的校验节点来生成校正码字。 设备可以确定一个或多个比特错误与LDPC码的吸收集相关联。 该设备还可以基于该不满足的校验节点集合来确定多个候选码字，并从多个候选码字中选择校正后的码字。 多个候选码字中的每一个可以表示与LDPC码相关联的有效码字。

公开(公告)号：US20250159678A1

公开(公告)日：2025-05-15

申请号：US18838553

申请日：2022-04-22

Applicant: QUALCOMM INCORPORATED

Inventor： Yi Huang ,  Jing Sun ,  Changlong Xu ,  Mostafa Khoshnevisan

IPC: H04W72/1268 ,  H04B7/06 ,  H04W72/115

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may determine time-frequency resources allocated for an acknowledgement (ACK) feedback and channel state information (CSI) overlap with periodic resource allocation for the uplink shared channel (e.g., a configured grant-physical uplink shared channel (CG-PUSCH)). The UE may multiplex uplink control information (UCI) for the uplink shared channel with at least some of the ACK feedback, the CSI, or both over the uplink shared channel message. For example, the UE may use an encoding chain designated for multiplexing ACK feedback of a priority type of the uplink shared channel message. After the UE multiplexes the ACK feedback, the CSI, or both with the UCI, the UE may transmit the uplink shared channel message.

公开(公告)号：US12279240B2

公开(公告)日：2025-04-15

申请号：US17758438

申请日：2020-02-14

Applicant: QUALCOMM Incorporated

Inventor： Changlong Xu ,  Xiaoxia Zhang ,  Jing Sun ,  Tao Luo

IPC: H04J3/00 ,  H04W72/0446

Abstract: This disclosure provides systems, methods and apparatus for cellular communications. In one aspect, a UE determines an FFP of a cell signal for the UE in a frame based equipment mode, determines one or more SSB positions in the cell signal based on the FFP, and performs radio management of the UE based at least in part on the one or more invalid SSB candidate positions. Performing radio management may include using one or more SSB positions in the FFP exclusive of the one or more invalid SSB candidate positions. Radio management may include PDSCH rate matching, radio link monitoring or measurement, or radio resource management. In some implementations, the one or more SSB positions are SSB positions after a first eight SSB positions in an FFP. In some other implementations, the one or more SSB positions are SSB positions that at least partially overlap an idle period between FFPs.

公开(公告)号：US12267174B2

公开(公告)日：2025-04-01

申请号：US18003640

申请日：2020-08-14

Applicant: QUALCOMM Incorporated

Inventor： Shaozhen Guo ,  Xiaoxia Zhang ,  Changlong Xu ,  Jing Sun

IPC: H04L1/00 ,  H04L1/1822 ,  H04L1/1867 ,  H04W72/23

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may start a timer after transmitting an uplink communication on a physical uplink shared channel to a base station using a configured grant. The UE may determine whether the uplink communication is acknowledged as received by the base station based at least in part on determining whether a downlink communication from the base station is detected within a time duration associated with the timer. Numerous other aspects are provided.

公开(公告)号：US12237919B2

公开(公告)日：2025-02-25

申请号：US18004648

申请日：2021-07-23

Applicant: QUALCOMM Incorporated

Inventor： Ruiming Zheng ,  Changlong Xu ,  Jian Li ,  Kangqi Liu ,  Liangming Wu ,  Peng Cheng ,  Hao Xu ,  Xipeng Zhu

IPC: H04L1/00 ,  H04L1/1607 ,  H04L1/1829 ,  H04L1/1867 ,  H04L69/22

Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device may receive one or more service data units (SDUs) at a layer two (L2) layer of the transmitting device. The transmitting device may encode, at the L2 layer, the one or more SDUs according to one or more network coding parameters to obtain at least one encoded protocol data unit (PDU), the one or more network coding parameters comprising a rateless code. The transmitting device may generate, for the at least one encoded PDU, at least one corresponding PDU header. The transmitting device may output the at least one encoded PDU and the at least one corresponding PDU header from the L2 layer to a lower layer of the transmitting device for transmission to one or more receiving devices.

公开(公告)号：US12177007B2

公开(公告)日：2024-12-24

申请号：US17753115

申请日：2020-08-17

Applicant: QUALCOMM Incorporated

Inventor： Changlong Xu ,  Ruiming Zheng ,  Tao Luo ,  Hao Xu

IPC: H04L1/00

Abstract: An apparatus, such as a base station, may determine channel conditions associated with at least two carriers on which communication with another apparatus is configured. The apparatus may encode a dataset into a set of protocol data units (PDUs) using fountain coding based on the channel conditions. The apparatus may send a first subset of the set of PDUs to the other apparatus on a first carrier of the at least two carriers. The apparatus may send a second subset of the set of PDUs to the other apparatus on a second carrier of the at least two carriers. Another apparatus, such as a user equipment (UE), may receive the set of PDUs from the apparatus over the at least two carriers, and may decode the set of PDUs to obtain a dataset using fountain coding.

公开(公告)号：US20240349340A1

公开(公告)日：2024-10-17

申请号：US18577613

申请日：2021-09-22

Applicant: QUALCOMM Incorporated

Inventor： Siyi Chen ,  Giovanni Chisci ,  Arumugam Chendamarai Kannan ,  Xiaoxia Zhang ,  Jing Sun ,  Rajat Prakash ,  Hao Xu ,  Changlong Xu ,  Luanxia Yang ,  Shaozhen Guo

IPC: H04W74/0816 ,  H04L27/26 ,  H04W28/02 ,  H04W92/18

CPC classification number: H04W74/0816 ,  H04L27/2605 ,  H04W28/0278 ,  H04W92/18

Abstract: This disclosure provides systems, methods, and devices for wireless communication that support mechanisms for sidelink channel occupancy time (COT) sharing request signaling in a wireless communication system. A sidelink transmitting user equipment (UE) transmits a COT sharing request to a sidelink initiator UE. The COT sharing request indicates to the initiator UE to initiate sharing of a COT acquired by the initiator UE with the transmitting UE. The initiator UE, in response to receiving the COT sharing request, determines to acquire the COT, and initiates COT sharing by transmitting, to the transmitting UE, COT sharing information including information to facilitate access to the COT by the transmitting UE. The transmitting UE, based on the COT sharing information received from the initiator UE, access the sidelink channel during the COT and transmits data over the sidelink channel.