公开(公告)号：US20190305885A1

公开(公告)日：2019-10-03

申请号：US16446237

申请日：2019-06-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaojian LIU ,  Yuejun WEI ,  Xin ZENG

IPC: H04L1/00 ,  H03M13/11

Abstract: A data transmission method, a data sending device, and a data receiving device are provided. The method includes: encoding, by a data sending device, information data by using a low-density parity-check (LDPC) code matrix, to obtain a bit sequence, where the bit sequence includes a first bit sequence, and the first bit sequence includes at least one information bit in the bit sequence; interleaving, the first bit sequence to obtain a first interleaved bit sequence; performing, modulation based on the first interleaved bit sequence to obtain a sending signal, and sending the sending signal. The method also includes: demodulating, by a data receiving device, a receiving signal to obtain a soft value sequence; and de-interleaving, the soft value sequence, to obtain a soft value sequence of a first bit sequence. This can improve a capability of an LDPC code resisting burst interference.

公开(公告)号：US20170105147A1

公开(公告)日：2017-04-13

申请号：US15316059

申请日：2014-07-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yinqing JIANG ,  Xiaoyan CHEN ,  Xiaojian LIU ,  Li SHEN

IPC: H04W36/00 ,  H04W36/36 ,  H04W36/08 ,  H04B17/318 ,  H04W36/14 ,  H04W48/18

CPC classification number: H04W36/0022 ,  H04B17/318 ,  H04W36/00 ,  H04W36/08 ,  H04W36/14 ,  H04W36/36 ,  H04W48/18 ,  H04W76/10

Abstract: Embodiments of the present invention relate to the field of wireless communications technologies, and provide a switching method. The method specifically includes: when user equipment is in idle mode, acquiring a 2G/3G base station candidate set; when initiating a voice service, sending a CSFB request message to an LTE base station; receiving a standard and a frequency of a target 2G/3G base station that are sent by the LTE base station to the user equipment; determining, according to the standard and the frequency of the target 2G/3G base station, whether the 2G/3G base station candidate set includes the target 2G/3G base station; and if the 2G/3G base station candidate set includes the target 2G/3G base station, switching, from the LTE base station to the target 2G/3G base station according to the standard and the frequency of the target 2G/3G base station.

公开(公告)号：US20230059125A1

公开(公告)日：2023-02-23

申请号：US17888198

申请日：2022-08-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Liang MA ,  Chen ZHENG ,  Xiaojian LIU ,  Yuejun WEI ,  Xin ZENG

IPC: H03M13/11 ,  H03M13/00 ,  H04L1/00

Abstract: A low density parity check (LDPC) channel encoding method for use in a wireless communications system includes a communication device encoding an input bit sequence by using a LDPC matrix to obtain an encoded bit sequence for transmission. The LDPC matrix is obtained based on a lifting factor Z and a base matrix. The encoding method can be used in various communications systems including the fifth generation (5G) telecommunication systems, and can support various encoding requirements for information bit sequences with different code lengths.

公开(公告)号：US20210160008A1

公开(公告)日：2021-05-27

申请号：US17165702

申请日：2021-02-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Chen ZHENG ,  Liang MA ,  Xin ZENG ,  Xiaojian LIU ,  Yuejun WEI

IPC: H04L1/00 ,  H03M13/25

Abstract: This application provides a data processing method and a communications device. The data processing method includes: determining, by a first communications device, NCB, based on a size of the circular buffer of the communications device and an information processing capability of a second communications device; and obtaining, by the first communications device, a second encoded bit segment from a first encoded bit segment having a length of NCB. According to the data processing method and the communications device provided in this application, decoding complexity of the communications device can be reduced and communication reliability can be improved.

公开(公告)号：US20200177303A1

公开(公告)日：2020-06-04

申请号：US16787958

申请日：2020-02-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Liang MA ,  Xin ZENG ,  Chen ZHENG ,  Xiaojian LIU ,  Yuejun WEI

IPC: H04L1/00 ,  H03M13/00 ,  H03M13/11

Abstract: Embodiments of this application disclose a communication method and a communications apparatus. The method includes: determining an encoding matrix type of a first sequence based on a modulation and encoding scheme MCS index, where the first sequence is obtained after code block segmentation is performed on a second sequence, a length of the second sequence is related to the MCS index, and a length of the first sequence is less than or equal to a first threshold; and encoding the first sequence based on the encoding matrix corresponding to the encoding matrix type. In the foregoing solution, the encoding matrix type can be properly selected for encoding.

公开(公告)号：US20200059329A1

公开(公告)日：2020-02-20

申请号：US16665750

申请日：2019-10-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Liang MA ,  Chen ZHENG ,  Xiaojian LIU ,  Yuejun WEI

IPC: H04L1/18 ,  H04L5/00 ,  H04L1/00 ,  H04W72/04

Abstract: This application provides a data processing method and a data processing apparatus. The data processing method includes: determining C code blocks, where C is a positive integer; and dividing the C code blocks into K code block groups, where an absolute value ΔC of a difference between quantities of code blocks included in any two of the K code block groups is less than or equal to a first threshold, and K is a positive integer. The data processing method and the data processing apparatus provided in this application help lower a bit error rate.

公开(公告)号：US20190356335A1

公开(公告)日：2019-11-21

申请号：US16527626

申请日：2019-07-31

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaojian LIU ,  Yuejun WEI ,  Chen ZHENG ,  Liang MA

IPC: H03M13/11 ,  H03M13/00 ,  H04L1/00

Abstract: The present disclosure relates 10 encoding methods, communication methods and apparatus. In one example method, a first information sequence is encoded by using a first matrix to obtain a second information sequence, where the first matrix meets a function related to a lifting factor and an element in Emax(H). The second information sequence is outputted.

公开(公告)号：US20190132082A1

公开(公告)日：2019-05-02

申请号：US16234138

申请日：2018-12-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Liang MA ,  Xin ZENG ,  Chen ZHENG ,  Xiaojian LIU ,  Yuejun WEI

IPC: H04L1/00 ,  H04L1/18 ,  H03M13/11 ,  H03M13/00

CPC classification number: H04L1/0067 ,  H03M13/1102 ,  H03M13/116 ,  H03M13/1185 ,  H03M13/616 ,  H03M13/618 ,  H03M13/6306 ,  H03M13/635 ,  H03M13/6362 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/0068 ,  H04L1/18 ,  H04L1/1812 ,  H04L1/1819

Abstract: This application discloses an information processing method, an apparatus, a communications device, and a communications system. The communications device is configured to: obtain a starting position in a buffer sequence W for an output bit sequence, and determine the output bit sequence from the buffer sequence W based on the starting position, where a value of the starting position is one element in {p0, p1, p2, . . . , pkmax−1}, 0≤k

公开(公告)号：US20170164270A1

公开(公告)日：2017-06-08

申请号：US15316731

申请日：2014-06-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yinqing JIANG ,  Bei DAI ,  Xiaojian LIU

IPC: H04W48/14 ,  H04W60/04 ,  H04B17/318 ,  H04W48/18 ,  H04W48/16

CPC classification number: H04W48/14 ,  H04B17/318 ,  H04W48/16 ,  H04W48/18 ,  H04W60/04

Abstract: Embodiments of the present disclosure provide a method for selecting a public land mobile network PLMN, and an apparatus and a device for same. The method includes: during a process of selecting a network by a mobile terminal, if it is learned by means of determining that a registered public land mobile network RPLMN and a home public land mobile network HPLMN correspond to the mobile terminal are unavailable, acquiring a PLMN network in a PLMN list pre-stored in the mobile terminal, to perform a registration, wherein the PLMN list includes network information of one or more other PLMN networks that are selected and successfully registered.

公开(公告)号：US20220352903A1

公开(公告)日：2022-11-03

申请号：US17742183

申请日：2022-05-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Chen ZHENG ,  Liang MA ,  Xiaojian LIU ,  Yuejun WEI ,  Xin ZENG

IPC: H03M13/11 ,  H03M13/00 ,  H04L1/00

Abstract: This application relates to communicating information between communication devices. A channel coding method is disclosed. A communication device obtains an input sequence of K bits. The communication device encodes the input sequence using a low density parity check (LDPC) matrix H, to obtain an encoded sequence. The LDPC matrix H is determined according to a base matrix and a lifting factor Z. The base matrix includes m rows and n columns, m is greater than or equal to 5, and n is greater than or equal to 27. The lifting factor Z satisfies a relationship of 22*Z≥K. According to the encoding method provided in the embodiments, information bit sequences of a plurality of lengths can be encoded for transmission between the communication devices.