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公开(公告)号：US20230261694A1
公开(公告)日：2023-08-17
申请号：US18005486
申请日：2020-09-09
Applicant: QUALCOMM Incorporated
Inventor： Shaozhen Guo , Jing Sun , Changlong Xu , Xiaoxia Zhang
IPC: H04B1/7143 , H04W74/08 , H04L5/00 , H04L27/26
CPC classification number: H04B1/7143 , H04W74/0808 , H04L5/0078 , H04L27/2607
Abstract: Wireless communications systems and methods related to frequency hopping in uplink transmission. A UE may be configured to transmit a first subset of data on a first frequency band to a BS over a first set of symbols. The UE may perform a listen-before-talk (LBT) during an LBT gap comprising a second set of symbols between the first set of symbols and a third set of symbols. The UE may use the LBT in the LBT gap to determine availability of a second frequency sub-band for a second subset of data that is a repetition of the first subset of data. The UE may be configured to transmit the second subset of data on the second frequency band to the BS over a third set of symbols if the LBT passes. Thus, embodiments of the present disclosure enable a UE to perform frequency hopping with repetitions across unlicensed frequency sub-bands.
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公开(公告)号：US11729783B2
公开(公告)日：2023-08-15
申请号：US16772736
申请日：2017-12-13
Applicant: Qualcomm Incorporated
Inventor： Changlong Xu , Liangming Wu , Kai Chen , Hao Xu , Jing Jiang , Jing Sun , Joseph Binamira Soriaga
CPC classification number: H04W72/23 , H04L1/08 , H04L5/0053
Abstract: Methods, systems, and devices for wireless communications are described. A wireless device such as a user equipment (UE) may monitor a search space of a control channel for at least one downlink transmission. The UE may perform a plurality of decoding operations on a plurality of decoding candidates associated with the downlink control information format transmitted in a plurality of transmission time intervals (TTIs). In some cases, the plurality of decoding operations may comprise performing a first decoding on a first decoding candidate received in a current TTI, the first decoding operation applying a first descrambling code to the first decoding candidate, and performing a second decoding operation on a combined decoding candidate that comprises soft combined information from the first and second decoding candidate, the second decoding candidate received in a prior TTI.
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公开(公告)号：US20230171032A1
公开(公告)日：2023-06-01
申请号：US17995394
申请日：2020-04-03
Applicant: QUALCOMM Incorporated
Inventor： Kangqi Liu , Changlong Xu , Jian Li , Liangming Wu , Yu Zhang , Hao Xu
CPC classification number: H04L1/08 , H04L5/0053
Abstract: Network coding in automatic receipt request (ARQ) functionality is disclosed. A compatible transmitter configures a new transmission period, in which the set of data for transmission is transmitted, and a retransmission period, after the new transmission period, in which a number of network coded data is retransmitted based on the acknowledgement feedback received from the receivers receiving the transmitted set of data. The acknowledgement feedback identifies one or more data requested for retransmission by one or more of the receivers. The transmitter determines a number of network coded data that could be transmitted to accommodate each of the requesting receivers and the data requested by such receivers for retransmission. These network coded data would then be retransmitted by the transmitter during the retransmission period.
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公开(公告)号：US11558149B2
公开(公告)日：2023-01-17
申请号：US16544788
申请日：2019-08-19
Applicant: QUALCOMM Incorporated
Inventor： Jian Li , Changlong Xu , Chao Wei , Jilei Hou
Abstract: 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, where the number of columns of the interleaver varies between the rows. In some examples, the interleaver includes a right isosceles triangle-shaped matrix of rows and columns. In other examples, the interleaver includes a trapezoid-shaped matrix of rows and columns.
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公开(公告)号：US11539456B2
公开(公告)日：2022-12-27
申请号：US16759255
申请日：2018-11-20
Applicant: QUALCOMM Incorporated
Inventor： Changlong Xu , Kai Chen , Jing Jiang , Gabi Sarkis , Hao Xu
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US11451245B2
公开(公告)日：2022-09-20
申请号：US16628209
申请日：2017-08-04
Applicant: QUALCOMM Incorporated
Inventor： Jian Li , Changlong Xu , Jing Jiang , Hao Xu , Jilei Hou
Abstract: 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.
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公开(公告)号：US11228394B2
公开(公告)日：2022-01-18
申请号：US16765066
申请日：2018-09-24
Applicant: Kai Chen , Changlong Xu , Jing Jiang , Gabi Sarkis , Hao Xu , Qualcomm Incorporated
Inventor： Kai Chen , Changlong Xu , Jing Jiang , Gabi Sarkis , Hao Xu
Abstract: Methods, systems, and devices for wireless communications are described. In some systems, wireless devices may encode and decode transmissions using polar codes. A transmitting device may encode a payload based on a selected payload size. For example, the transmitting device may construct a bit vector including payload bits, parity bits, frozen bits, or some combination of these, and may modify the bits or the order of the bits based on the selected payload size. The device may generate a polar-encoded codeword based on this bit vector, and may transmit the polar-encoded codeword to a receiving device. The receiving device may blind decode the polar-encoded codeword, and may determine the correct payload size based on the decoded bit vector. For example, the device may perform decoding or may check decoded bits based on a payload size hypothesis, where the decoding may fail for any incorrect payload size hypothesis.
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公开(公告)号：US11146296B2
公开(公告)日：2021-10-12
申请号：US15733711
申请日：2019-04-02
Applicant: QUALCOMM Incorporated , Kai Chen , Changlong Xu , Liangming Wu , Jing Jiang , Hao Xu
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：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
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.
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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
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.
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