公开(公告)号：US20210036718A1

公开(公告)日：2021-02-04

申请号：US15733711

申请日：2019-04-02

申请人： Kai CHEN ,  Changlong XU ,  Liangming WU ,  Jing JIANG ,  Hao XU ,  QUALCOMM INCORPORATED

发明人： Kai CHEN ,  Changlong XU ,  Liangming WU ,  Jing JIANG ,  Hao XU

IPC分类号： H03M13/13 ,  H03M13/00 ,  H03M13/43 ,  H03M13/45 ,  H04L1/18

摘要： Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an encoding device may determine a least reliable subset of information bits included in a set of information bits that includes a predefined active set of information bits to be encoded; may determine a codeword bit to be added to a codeword based at least in part on the least reliable subset of information bits, wherein adding the codeword bit to the codeword improves reliability of the least reliable subset of information bits; may add the codeword bit to the codeword; and may transmit the codeword. Numerous other aspects are provided.

公开(公告)号：US20230232329A1

公开(公告)日：2023-07-20

申请号：US17997124

申请日：2020-06-18

申请人： Siyi CHEN ,  Jing SUN ,  Changlong XU ,  Xiaoxia ZHANG ,  Hao XU ,  QUALCOMM INCORPORATED

发明人： Siyi CHEN ,  Jing SUN ,  Changlong XU ,  Xiaoxia ZHANG ,  Hao XU

IPC分类号： H04W52/02 ,  H04W24/10 ,  H04W4/33

CPC分类号： H04W52/0235 ,  H04W52/0241 ,  H04W24/10 ,  H04W4/33

摘要： The apparatus of wireless communication is a UE. The UE out of coverage of any base station may operate in a VLP mode and set a signal transmission power to a first power level. The UE may detect and connect to a base station, switch the power mode of UE based on a power mode of the base station connected by the UE, and switch the signal transmission power from the first power level to the second power level greater than the first power level. When the UE detects equal to or more than two base stations, the UE may select the base station from the equal to or more than two base stations detected based on a condition and connect to the base station selected from the two detected base stations.

公开(公告)号：US20230300816A1

公开(公告)日：2023-09-21

申请号：US18014719

申请日：2020-08-21

申请人： Shaozhen GUO ,  Jing SUN ,  Changlong XU ,  Xiaoxia ZHANG ,  Rajat PRAKASH ,  Hao XU ,  QUALCOMM Incorporated

发明人： Shaozhen GUO ,  Jing SUN ,  Changlong XU ,  Xiaoxia ZHANG ,  Rajat PRAKASH ,  Hao XU

IPC分类号： H04W72/11 ,  H04W72/1273 ,  H04L1/1812 ,  H04L5/00

CPC分类号： H04W72/11 ,  H04W72/1273 ,  H04L1/1812 ,  H04L5/0053

摘要： A method of wireless communication, by a user equipment (UE) includes receiving downlink semi-persistent scheduling (SPS) configurations. The method also includes receiving a physical downlink shared channel (PDSCH) transmission for each of the plurality of SPS configurations. Each PDSCH transmission has no associated physical downlink control channel (PDCCH). The method further includes determining whether successful decoding of each of the PDSCH transmissions occurred. The method further includes generating a hybrid automatic repeat request (HARQ) codebook for the PDSCH transmissions based on the determining. The method also includes transmitting the HARQ codebook in a physical uplink control channel (PUCCH) only when at least one ACK is present in the HARQ codebook.

公开(公告)号：US20210152187A1

公开(公告)日：2021-05-20

申请号：US16628209

申请日：2017-08-04

申请人： Jian LI ,  Changlong XU ,  Jing JIANG ,  Hao XU ,  Jilei HOU ,  QUALCOMM Incorporated

发明人： Jian LI ,  Changlong XU ,  Jing JIANG ,  Hao XU ,  Jilei HOU

IPC分类号： H03M13/27 ,  H03M13/00 ,  H03M13/15 ,  H03M13/29

摘要： Aspects of the disclosure relate to wireless communication devices configured to encode information blocks to produce code blocks and interleave the code blocks utilizing an interleaver including a plurality of rows and a plurality of columns. In some examples, the interleaver includes a right isosceles triangle-shaped matrix of rows and columns. In other examples, the interleaver includes a rectangle-shaped matrix of rows and columns.

公开(公告)号：US20200374034A1

公开(公告)日：2020-11-26

申请号：US16759255

申请日：2018-11-20

申请人： Changlong XU ,  Kai CHEN ,  Jing JIANG ,  Gabi SARKIS ,  Hao XU ,  QUALCOMM Incorporated

发明人： Changlong XU ,  Kai CHEN ,  Jing JIANG ,  Gabi SARKIS ,  Hao XU

IPC分类号： H04L1/00 ,  H04L1/08 ,  H04L1/18

摘要： Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to methods and apparatus for rate-matching a stream of bits encoded using polar codes. An exemplary method generally includes determining a target coding rate, RT, for transmitting a group of K information bits, based on a first coding rate, R1, corresponding to a first target block error rate (BLER) for a first transmission of a first redundancy version (RV) of the packet and a second coding rate, R2, corresponding to a second target BLER for a last transmission of a last RV of the packet; determining a circular buffer size, N, of a circular buffer for use in transmitting the first RV and the last RV of the packet; generating encoded information bits from the K information bits using a polar code having a mother code size of N; writing the encoded information bits to the circular buffer; determining a maximum number of retransmissions, based on a latency requirement for the packet; generating different RVs from the encoded information bits in the circular buffer, each RV based on a corresponding target BLER; and transmitting the first RV via a wireless medium.

公开(公告)号：US20210067269A1

公开(公告)日：2021-03-04

申请号：US16960494

申请日：2019-02-06

申请人： Kai CHEN ,  Liangming WU ,  Jian LI ,  Hao XU ,  QUALCOMM Incorporated

发明人： Kai CHEN ,  Liangming WU ,  Changlong XU ,  Jian LIN ,  Hao XU

IPC分类号： H04L1/00

摘要： A method, apparatus, and computer-readable medium for transmitting coded messages to a receiving device including constructing a data vector including a plurality of data bits, transforming the data vector into a u-domain vector, applying a mask to the u-domain vector, encoding the masked u-domain vector with polar encoding to generate a transmission vector, and transmitting, to the receiving device, the transmission vector.

公开(公告)号：US20200083987A1

公开(公告)日：2020-03-12

申请号：US16468622

申请日：2018-01-08

申请人： Changlong XU ,  Chao WEI ,  Jing JIANG ,  Gaojin WU ,  Hari SANKAR ,  Jilei HOU ,  QUALCOMM Incorporated

发明人： Changlong XU ,  Chao WEI ,  Jing JIANG ,  Gaojin WU ,  Hari SANKAR ,  Jilei HOU

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

摘要： Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to methods and apparatus for rate-matching control channels using polar codes. An exemplary method generally includes encoding a stream of bits using a polar code, determining a size of a circular buffer for storing the encoded stream of bits based, at least in part, on a minimum supported code rate and a control information size, and performing rate-matching on stored encoded stream of bits based, at least in part, on a mother code size, N, and a number of coded bits for transmission, E.

公开(公告)号：US20190215105A1

公开(公告)日：2019-07-11

申请号：US16336250

申请日：2017-06-22

申请人： Changlong XU ,  Jian LI ,  Chao WEI ,  Chong LI ,  Joseph Binamina SORIAGA ,  Jelei HOU ,  QUALCOMM Incorporated

发明人： Changlong XU ,  Jian Li ,  Chao WEI ,  Chong LI ,  Joseph Binamira SORIAGA ,  Jilei HOU

IPC分类号： H04L1/18 ,  H04L1/00 ,  H03M13/13 ,  H04B17/336

CPC分类号： H04L1/1819 ,  H03M13/13 ,  H04B17/336 ,  H04L1/00 ,  H04L1/0063 ,  H04L1/0068

摘要： 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：US20200187166A1

公开(公告)日：2020-06-11

申请号：US16336303

申请日：2017-07-11

申请人： Changlong XU ,  Jian LI ,  Chao WEI ,  Chong LI ,  Tingfang JI ,  Jilei HOU ,  QUALCOMM Incorporated

发明人： Changlong XU ,  Jian LI ,  Chao WEI ,  Chong LI ,  Tingfang JI ,  Jilei HOU

IPC分类号： H04W72/04 ,  H04L1/00

摘要： Various aspects of the disclosure relate to mapping different information to different sub-channels. For example, information for different users may be mapped to different Polar code sub-channels. In some aspects, the mapping may be unbalanced in that different information is mapped to different sub-channels according to the quality (e.g., in terms of error probability) of the sub-channels and a criterion associated with the information. For example, control information for users that are experiencing the worst channel quality (e.g., in a wireless communication channel) may be mapped to the Polar code sub-channels that have the best quality.

公开(公告)号：US20190296776A1

公开(公告)日：2019-09-26

申请号：US16317395

申请日：2017-06-12

申请人： Changlong XU ,  Jian LI ,  Chao WEI ,  Jilei HOU ,  QUALCOMM Incorporated

发明人： Changlong XU ,  Jian LI ,  Chao WEI ,  Jilei HOU

IPC分类号： H03M13/00 ,  H03M13/13

摘要： Various aspects of the disclosure relate to rate matching techniques for block encoding. In some aspects, a decision regarding whether to use repetition-based rate matching or puncture-based rate matching is made based on a block size of information being encoded. In some aspects, repetition-based rate matching uses a bit-reversal permutation technique.