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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).
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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.
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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
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.
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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
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).
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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.
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Patent Agency Ranking
公开(公告)号：US11632193B2
公开(公告)日：2023-04-18
申请号：US16493364
申请日：2018-04-18
Applicant: Qualcomm Incorporated
Inventor： Changlong Xu , Jian Li , Chao Wei , Jing Jiang , Jilei Hou
Abstract: Methods, systems, and devices for wireless communication are described for dynamic frozen bits of polar codes for early termination and performance improvement. A wireless device may receive a signal comprising a codeword encoded using a polar code. The wireless device may perform decoding of the codeword including at least: parity check of a first subset of decoding paths for making a decision on early termination of decoding of the codeword based on dynamic frozen bits, and generating path metrics for a second subset of the decoding paths that each pass the parity check based on the dynamic frozen bits, and performing error detection on a bit sequence corresponding to one of the second subset of the decoding paths based at part on error detection bits and the generated path metrics. The wireless device may process the information bits based on a result of the decoding.
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公开(公告)号：US11515889B2
公开(公告)日：2022-11-29
申请号：US16757794
申请日：2018-11-14
Applicant: QUALCOMM Incorporated
Inventor： Liangming Wu , Changlong Xu , Jing Jiang , Gabi Sarkis , Yu Zhang , Kai Chen
Abstract: Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to methods and apparatus for segmenting uplink control information prior for encoding using a polar code prior to transmission. An exemplary method that may be performed by a wireless device generally includes iteratively segmenting a group of K information bits into a plurality of segments, encoding the information bits of each of the plurality of segments using a polar code to generate a plurality of encoded segments, and transmitting the plurality of encoded segments.
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公开(公告)号：US11470598B2
公开(公告)日：2022-10-11
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：US11445489B2
公开(公告)日：2022-09-13
申请号：US16772656
申请日：2018-11-14
Applicant: Qualcomm Incorporated
Inventor： Changlong Xu , Kai Chen , Hao Xu , Jing Jiang , Jing Sun
Abstract: Methods, systems, and devices for wireless communications are described that provide for a location indicator transmission that may indicate a location of control channel resources that are to be monitored by a user equipment (UE) for control channel transmissions. A UE may receive the location indicator, and monitor the indicated control channel resources to receive downlink control information with an allocation of shared channel resources for the UE. The location indicator may include one or more parameters that allow a UE to receive the control channel transmissions according to a single decoding hypothesis. The location indicator may include one or more of a valid period of the location of the control channel transmissions, an interval at which control channel transmissions may be transmitted, an aggregation level used for the control channel transmissions, an index that identifies a first control channel element of the control channel transmissions, or combinations thereof.
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公开(公告)号：US11411678B2
公开(公告)日：2022-08-09
申请号：US17271746
申请日：2019-10-03
Applicant: 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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