公开(公告)号：US11018804B2

公开(公告)日：2021-05-25

申请号：US16467463

申请日：2017-12-07

Applicant: Qualcomm Incorporated

Inventor： Jing Jiang ,  Gabi Sarkis ,  Yang Yang ,  Shrinivas Kudekar ,  Joseph Binamira Soriaga ,  Hari Sankar ,  Changlong Xu ,  Chao Wei

IPC: H04L27/00 ,  H04L1/00

Abstract: Methods, systems, and devices for encoding and decoding are described. To encode a vector, an encoder allocates information bits of the vector to channel instances of a channel that are separated into groups. The groups may vary in size and allocation of the information bits is based on a base sequence of a given length. During decoding, a decoder assigns different bit types to channels instances by dividing a codeword into a plurality of groups and assigning bit types to channel instances of the plurality of groups using the base sequence.

公开(公告)号：US20210152191A1

公开(公告)日：2021-05-20

申请号：US16605911

申请日：2017-05-15

Applicant: Qualcomm Incorporated

Inventor： Gabi Sarkis ,  Hari Sankar ,  Gaojin Wu ,  Changlong Xu ,  Jing Jiang ,  Huang Lou

IPC: H03M13/37 ,  H03M13/13

Abstract: Techniques are described herein to terminate a list decoding operation before its completion based on performing one or more error check processes. A transmitted codeword encoded using a polar code may include one or more error check vectors interspersed with one or more information vectors. Upon receiving the codeword, a decoder may perform a list decoding operation on the received codeword. Upon decoding one of the error check vectors, the decoder may determine whether at least one candidate path used in the successive cancellation list decoding operation passes an error check process based on the error check vector. If no candidate paths satisfy the error check process, the decoder may terminate the list decoding operation. In some examples, the decoder may recheck whether candidate paths satisfy the error check operation at intermediate positions between error check vectors. Such rechecking may occur while decoding information vectors.

公开(公告)号：US10855405B2

公开(公告)日：2020-12-01

申请号：US16336250

申请日：2017-06-22

Applicant: QUALCOMM Incorporated

Inventor： Changlong Xu ,  Jian Li ,  Chao Wei ,  Chong Li ,  Joseph Binamira Soriaga ,  Jilei Hou

IPC: H04J11/00 ,  H04L1/18 ,  H04L1/00 ,  H04B17/336 ,  H03M13/13

Abstract: Various aspects of the disclosure relate to retransmission techniques for communication of information (e.g., for wireless communication). In some aspects, if a device's first transmission including encoded data and parity information (subject to puncture) fails, the device's retransmission (e.g., in response to a NAK) involves transmitting the parity information that was punctured. In some aspects, the coding rate used for encoding the data for the first transmission is selected to meet an error rate (e.g., a block error rate) for the second transmission. The second transmission may also include repetition information that includes the encoded data. The repetition information could also include at least a portion of the encoded parity information.

公开(公告)号：US10291359B2

公开(公告)日：2019-05-14

申请号：US15643003

申请日：2017-07-06

Applicant: QUALCOMM Incorporated

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

IPC: H04L1/18 ,  H04L1/00 ,  H04L1/08 ,  H04L1/16 ,  H04L1/20 ,  G08C25/02

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：US12177827B2

公开(公告)日：2024-12-24

申请号：US17427854

申请日：2019-02-08

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Changlong Xu ,  Hao Xu

IPC: H04W72/121 ,  H04W72/23

Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may obtain group control information in a group common physical downlink shared channel (PDSCH), determine resources for communicating on a shared channel based on the group control information, and communicate on the resources of the shared channel. A base station may configure a user equipment (UE) group comprising at least one UE, transmit, in a group common physical downlink shared channel (PDSCH), group control information for scheduling the at least one UE for communicating on a shared channel, and communicate on the shared channel with the at least one UE.

公开(公告)号：US12069643B2

公开(公告)日：2024-08-20

申请号：US17596065

申请日：2019-06-28

Applicant: QUALCOMM Incorporated

Inventor： Qiaoyu Li ,  Chao Wei ,  Chenxi Hao ,  Liangming Wu ,  Yu Zhang ,  Yuwei Ren ,  Changlong Xu ,  Min Huang ,  Hao Xu ,  Wanshi Chen

IPC: H04W72/12 ,  H04W72/04 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/1263 ,  H04W72/23

CPC classification number: H04W72/1263 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/23

Abstract: Aspects are provided which allow a user equipment (UE) to identify a low-bandwidth (low-BW) CORESET-0 and associated CSS based on reception bandwidth of the UE. The base station may configure different frequency and time-domain resources of the low-BW CORESET in order to optimize resource utilization of the low-BW CORESET-0, and the low-tier UE may identify these resources of CORESET-0 and CSS from the system configuration information received in a master information block (MIB). As a result, low tier UEs may operate in a same cell as legacy UEs without the need for the base station to transmit additional signaling to either legacy UEs or lower tier UEs for the UEs to receive their respective CORESET-0's and identify a physical downlink channel (PDCCH).

公开(公告)号：US12057937B2

公开(公告)日：2024-08-06

申请号：US17593902

申请日：2019-04-15

Applicant: QUALCOMM Incorporated

Inventor： Liangming Wu ,  Changlong Xu ,  Jian Li ,  Jing Jiang ,  Wei Yang ,  Ying Wang

IPC: H04L1/00

CPC classification number: H04L1/0057 ,  H04L1/005

Abstract: Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to methods and apparatus for adjusting a number of encoded bits, M, in block puncturing and/or shortening calculations to improve encoding performance. An exemplary method that may be performed by a wireless device generally includes iteratively determining a parameter, Madj, for construction of a polar code of size N for use in encoding K information bits, based on: at least two parameters, α and β, related to how many iterations to use in determining Madj, and a number of encoded bits, M; performing information adjustment allocation of the K information bits to an upper part and a lower part of the polar code based on Madj; and transmitting the upper part and the lower part of the polar code via a wireless medium.

公开(公告)号：US12052031B2

公开(公告)日：2024-07-30

申请号：US16494621

申请日：2018-01-11

Applicant: Qualcomm Incorporated

Inventor： Changlong Xu ,  Jian Li ,  Liangming Wu ,  Joseph Binamira Soriaga ,  Jilei Hou

IPC: H03M13/09 ,  H03M13/00 ,  H03M13/13 ,  H03M13/29 ,  H03M13/35 ,  H03M13/37 ,  H04L1/00 ,  H04W72/21

CPC classification number: H03M13/09 ,  H03M13/13 ,  H03M13/2927 ,  H03M13/616 ,  H04L1/0061 ,  H04L1/0072 ,  H04W72/21

Abstract: Methods, systems, and devices for wireless communication are described. A transmitter may generate a first segmentation based on a first subset of control information and a second segmentation based on jointly encoding the first subset and a second subset of the control information. The transmitter may polar encode the first segmentation to generate a first codeword and the second segmentation to generate a second codeword, and transmit the first and second codewords. A receiver may determine a first bit sequence corresponding to the first subset based on decoding a first codeword and determine an error detection code (EDC) and a second bit sequence corresponding to the second subset based on decoding a second codeword. The receiver may perform error detection on the first and second bit sequences based on the determined EDC, and output the first bit sequence and the second bit sequence or a decoding error.

公开(公告)号：US11956079B2

公开(公告)日：2024-04-09

申请号：US17929942

申请日：2022-09-06

Applicant: QUALCOMM Incorporated

Inventor： Changlong Xu ,  Chao Wei ,  Jing Jiang ,  Jilei Hou ,  Yang Yang ,  Gabi Sarkis

IPC: H04L1/00 ,  H04L1/08

CPC classification number: H04L1/0067 ,  H04L1/0041 ,  H04L1/0057 ,  H04L1/08

Abstract: Aspects of the disclosure relate to rate-matching a stream of bits encoded using polar codes. An exemplary method generally includes determining a mother code size (N) for transmitting an encoded stream of bits based, at least in part, on a minimum supported code rate for transmitting the encoded stream of bits (Rmin), a control information size of the encoded stream of bits (K), a number of coded bits for transmission (E), and a maximum mother code size (Nmax), encoding a stream of bits using a polar code of size (N, K) and storing the encoded stream of bits in a circular buffer, and performing rate-matching on the stored encoded stream of bits based, at least in part, on a comparison among the mother code size (N), the control information size of the encoded stream of bits (K), and the number of coded bits for transmission (E).

公开(公告)号：US11646830B2

公开(公告)日：2023-05-09

申请号：US17054917

申请日：2019-05-28

Applicant: Qualcomm Incorporated

Inventor： Kai Chen ,  Jian Li ,  Changlong Xu ,  Liangming Wu ,  Hao Xu

IPC: H04L1/18 ,  H04L1/00 ,  H04L5/00 ,  H04L1/1812 ,  H04L1/1829

CPC classification number: H04L1/1819 ,  H04L1/0057 ,  H04L1/0069 ,  H04L1/1861 ,  H04L5/0051

Abstract: A device may identify that an incremental redundancy hybrid automatic repeat request (IR-HARQ) scheme is used in association with sequential transmissions of an information bit vector to or from another wireless device, where each transmission in the scheme is associated with a resource size. The device may identify a mother code length for a polar code based at least in part on an aggregate resource size associated with the sequential transmissions. The device may identify an adjusted bit index set for the polar code based at least in part on the IR-HARQ scheme. The device may transmit (or receive), for each transmission of the information bit vector, a respective subset of encoded bits generated by mapping the information bit vector to a set of polarized bit channels of the polar code in accordance with the bit index set.