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公开(公告)号：US20210234639A1
公开(公告)日：2021-07-29
申请号：US17054917
申请日：2019-05-28
Applicant: Kai CHEN , Jian LI , Changlong XU , Liangming WU , Hao XU , Qualcomm incorporated
Inventor： Kai CHEN , Jian LI , Changlong XU , Liangming WU , Hao XU
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.
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公开(公告)号：US20210105089A1
公开(公告)日：2021-04-08
申请号：US15733499
申请日：2019-01-17
Applicant: Kai CHEN , Liangming WU , Changlong XU , Jian UI , Hao XU , QUALCOMM Incorporated
Inventor： Kai CHEN , Liangming WU , Changlong XU , Jian LI , Hao XU
Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may perform a first polar code encoding process on a first transmission of a hybrid automatic repeat request (HARQ) process; generate a second transmission of the HARQ process by relocating a portion of bits in less reliable positions of the first transmission to more reliable positions of the second transmission of the HARQ process, wherein the less reliable positions and the more reliable positions are evaluated based at least in part on a channel transform, wherein the channel transform is based at least in part on the first transmission, the second transmission, the first polar encoding process and a second polar encoding process associated with the second transmission; and transmit the second transmission of the HARQ process. Numerous other aspects are provided.
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公开(公告)号：US20210099982A1
公开(公告)日：2021-04-01
申请号：US17044709
申请日：2019-04-02
Applicant: QUALCOMM Incorporated
Inventor： Changlong XU , Chao WEI , Liangming WU , Peng CHENG , Kai CHEN , Hao XU , Tingfang JI
Abstract: Aspects of the disclosure relate to wireless communication. In some aspects, a user equipment (UE) may receive an indicator, in a physical downlink control channel (PDCCH) payload, that indicates whether the PDCCH payload includes data or downlink control information (DCI) for obtaining the data, wherein the indicator is an initial state of a cyclic redundancy check that includes a predefined sequence of bits; and obtain at least one of the data or the DCI based at least in part on the indicator. Numerous other aspects are provided.
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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
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.
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公开(公告)号：US20200343909A1
公开(公告)日：2020-10-29
申请号：US16760758
申请日：2018-09-21
Applicant: QUALCOMM Incorporated
Inventor： Kai CHEN , Liangming WU , Changlong XU , Jing JIANG , Hao XU
Abstract: Certain aspects of the present disclosure generally relate to techniques for encoding and decoding bits of information using cyclic redundancy check (CRC) concatenated polar encoding and decoding. The CRC concatenated polar encoding techniques may avoid transmission of dummy bits. A method generally includes obtaining the bits of information to be transmitted. The method includes performing CRC outer encoding of the bits of information using an even-weighted generator polynomial to produce CRC encoded bits. The method includes performing polar inner encoding of the CRC encoded bits to generate a codeword. The method includes discarding a first code bit at a beginning of the codeword. The shortened codeword is transmitted over a wireless medium. In another method, bit-level scrambling is performed on the CRC encoded bits before the polar encoding to avoid generating a dummy bit. In another method, only odd-weighted generator polynomials are selected to avoid generating the dummy bit.
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Patent Agency Ranking
公开(公告)号：US20220140946A1
公开(公告)日：2022-05-05
申请号：US17310189
申请日：2019-01-23
Applicant: Kai CHEN , Changlong XU , Liangming WU , Jian LI , Jing JIANG , Hao XU , QUALCOMM Incorporated
Inventor： Kai CHEN , Changlong XU , Liangming WU , Jian LI , Jing JIANG , Hao XU
IPC: H04L1/08
Abstract: Wireless communications systems and methods related to hybrid repeat request (HARQ) with rate splitting are provided. A first wireless communication device communicates, with a second wireless communication device, a first communication signal including a plurality of information bits. The first wireless communication device determines a number of bits in the plurality of information bits to be repeated in a second communication signal based on channel capacity information. The first wireless communication device communicates, with the second wireless communication device, the second communication signal including the plurality of information bits and a repetition of a subset of the plurality of information bits, where the subset of the plurality of information bits includes the determined number of bits.
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公开(公告)号：US20210067269A1
公开(公告)日：2021-03-04
申请号：US16960494
申请日：2019-02-06
Applicant: Kai CHEN , Liangming WU , Jian LI , Hao XU , QUALCOMM Incorporated
Inventor： Kai CHEN , Liangming WU , Changlong XU , Jian LIN , Hao XU
IPC: H04L1/00
Abstract: 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.
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公开(公告)号：US20210036718A1
公开(公告)日：2021-02-04
申请号：US15733711
申请日：2019-04-02
Applicant: Kai CHEN , Changlong XU , Liangming WU , Jing JIANG , Hao XU , QUALCOMM INCORPORATED
Inventor： Kai CHEN , Changlong XU , Liangming WU , Jing JIANG , Hao XU
Abstract: 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.
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公开(公告)号：US20210328718A1
公开(公告)日：2021-10-21
申请号：US17271746
申请日：2019-10-03
Applicant: Kai CHEN , Changlong XU , Liangming WU , Jian LI , Hao XU , Qualcomm Incorporated
Inventor： Kai CHEN , Changlong XU , Liangming WU , Jian LI , Hao XU
Abstract: Wireless devices may use polar codes for encoding transmissions and may support combining transmissions to improve decoding reliability (e.g., by achieving chase combining and incremental redundancy (IR) gains). For example, an encoding device may puncture a set of mother code bits using different puncturing patterns to obtain different redundancy versions for a first transmission and a re-transmission. Each puncturing pattern may correspond to an equivalent decoding performance. In some cases, to obtain equivalent puncture sets, the encoding device may perform punctured index manipulation procedures on an initial puncturing pattern. A punctured index manipulation procedure may involve switching a binary state for a binary bit at a same binary bit index for each puncture index in a puncturing pattern. A device may receive the transmissions generated using the equivalent puncture sets and may combine the information for improved decoding reliability.
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公开(公告)号：US20210250993A1
公开(公告)日：2021-08-12
申请号：US16972674
申请日：2019-06-12
Applicant: Qiaoyu LI , Chao WEI , Kai CHEN , Hao XU , Qualcomm Incorporated
Abstract: Methods, systems, and devices for wireless communications are described in which sequence groups, and sequence hopping patterns may be used to distinguish concurrent non-orthogonal multiple access (NOMA) transmissions. A wireless device, such as a user equipment (UE), may identify, for a message, a first transmission opportunity from a plurality of transmission opportunities associated with grant-free uplink contention-based transmissions (e.g., NOMA transmissions); select a multiple access (MA) signature sequence from a group of MA signature sequences associated with the first transmission opportunity; identify a hopping pattern associated with the MA signature sequence; and transmit one or more redundancy versions of the message in one or more of the plurality of transmission opportunities comprising the first transmission opportunity according to the MA signature sequence and the hopping pattern.
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