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公开(公告)号：US20220225432A1
公开(公告)日：2022-07-14
申请号：US17706202
申请日：2022-03-28
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Xiaolu WANG , Hejia LUO , Jianwei ZHOU , Chenlei XU
Abstract: One example method includes that a terminal device determines first random access information associated with a first synchronization broadcast block and associated with a beam parameter of a satellite beam, where the beam parameter is used to distinguish the satellite beam. The terminal sends a preamble to a satellite based on the first random access information. The satellite receives the preamble from the terminal, and determines the first random access information. The satellite determines the first SSB and the beam parameter of the satellite beam that are associated with the first random access information.
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公开(公告)号：US20220225424A1
公开(公告)日：2022-07-14
申请号：US17707299
申请日：2022-03-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Xiaolu WANG , Hejia LUO , Chenlei XU , Jianwei ZHOU , Rong LI
IPC: H04W74/08 , H04L43/0864 , H04W74/00
Abstract: This disclosure provides data processing methods. One example including a network device obtains target information that includes a transmission delay difference corresponding to a target beam or a target cell; determines a first preamble format based on the transmission delay difference, and then determines first configuration information used to indicate the first preamble format and a first set of random access occasions included in a random access period, where an interval between random access times included in the first set of random access occasions is greater than or equal to a preamble length corresponding to the first preamble format; and generates a corresponding first configuration index based on the first configuration information. The preamble formats required for different beams or cells can be determined based on transmission delay differences corresponding to the different beams or cells, and then configuration information of a random access occasion is further determined.
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公开(公告)号：US20220224463A1
公开(公告)日：2022-07-14
申请号：US17707815
申请日：2022-03-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Chenlei XU , Hejia LUO , Jianwei ZHOU , Xiaolu WANG
Abstract: Example satellite communication methods and example related devices are provided. One example satellite communication method includes generating a random access preamble sequence, where the random access preamble sequence includes a cyclic prefix, a sequence part, and a guard interval, the sequence part is obtained by performing frequency domain resource mapping and time-frequency transformation on a frequency domain sequence, and the frequency domain sequence is obtained based on a Zadoff-Chu (ZC) sequence and a mask sequence. The random access preamble sequence can then be output.
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公开(公告)号：US20220224404A1
公开(公告)日：2022-07-14
申请号：US17707558
申请日：2022-03-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Chenlei XU , Jianwei ZHOU , Hejia LUO , Xiaolu WANG
Abstract: The disclosure provides satellite communication methods and related devices. One example method includes generating a random access preamble sequence which includes a cyclic prefix, a sequence part, and a guard interval. The sequence part includes a subsequence A and a subsequence B, or the sequence part includes a subsequence C, and the subsequence C is a time domain superimposed sequence of a subsequence A and a subsequence B. The subsequence A includes at least one preamble symbol, the subsequence B includes at least one preamble symbol, and the subsequence A and the subsequence B are respectively generated by using ZC sequences of different root indexes, a quantity of subsequences A is m, a quantity of subsequences B is m or m−1, and m is a positive integer. The method further includes outputting the random access preamble sequence.
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公开(公告)号：US20220217033A1
公开(公告)日：2022-07-07
申请号：US17706291
申请日：2022-03-28
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Jianwei ZHOU , Chenlei XU , Hejia LUO , Jun WANG
Abstract: Example signal transmission methods based on satellite communication and apparatus are described. One example method includes obtaining, by a communication device, carrier attribute information corresponding to a target carrier used to transmit an orthogonal frequency division multiplexing (OFDM) symbol. The carrier attribute information of the target carrier includes subcarrier spacing. The communications device determines a cyclic prefix (CP) length of the OFDM symbol based on the carrier attribute information of the target carrier and a preset correspondence between carrier attribute information and the OFDM symbol. The CP is used to carry first data. The first data is data in the OFDM symbol.
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Patent Agency Ranking
公开(公告)号：US20220190910A1
公开(公告)日：2022-06-16
申请号：US17684730
申请日：2022-03-02
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yu WANG , Yunfei QIAO , Hejia LUO , Xian MENG
Abstract: This application relates to the field of communication technologies, and discloses a communication method and a communication apparatus, to resolve a problem of a poor interference suppression effect caused by closing an edge beam of a satellite. The method includes: A first satellite sends a first message to a second satellite. The first message includes information about a frequency reuse scheme. The information about the frequency reuse scheme includes basic unit information. The basic unit information includes central point locations and frequency information of at least N−1 beams. Herein, N is a frequency reuse factor of the first satellite. At least N−1 different pieces of frequency information exist in the frequency information that is of the at least N−1 beams and that is included in the basic unit information. In addition, N is a positive integer greater than or equal to 3.
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公开(公告)号：US20210392597A1
公开(公告)日：2021-12-16
申请号：US17407526
申请日：2021-08-20
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Chenlei XU , Jianwei ZHOU , Zhenjun JIANG , Hejia LUO
IPC: H04W56/00
Abstract: This application provides an example timing advance update method, an example terminal, and an example base station. One example method includes receiving, by a terminal, an updated timing advance TA value and a beam cell identity of a beam cell in which the terminal is located that are sent by a base station. The example method also includes obtaining, by the terminal, corresponding TA compensation information based on the beam cell identity. The example method further includes performing, by the terminal, TA compensation in a TA update period based on the updated TA value and the TA compensation information. The example method also includes sending, by the terminal, uplink data by using a TA value obtained after TA compensation is performed.
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公开(公告)号：US20210352524A1
公开(公告)日：2021-11-11
申请号：US17385338
申请日：2021-07-26
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Shengchen DAI , Rong LI , Chaolong ZHANG , Lingchen HUANG , Hejia LUO
Abstract: This application provides a wireless communication method and device. The method includes: obtaining downlink control information DCI and a scrambled sequence that are sent by a network device, where bits corresponding to the scrambled sequence are scrambled with each piece of configuration information of a plurality of pieces of configuration information used for configuring a terminal device by the network device, each piece of configuration information corresponds to at least one bit in the scrambled sequence, and at least one bit of the bits that correspond to each piece of configuration information does not correspond to another piece of configuration information of the plurality of pieces of configuration information; descrambling, based on a possible value of each piece of configuration information, the bits that correspond to each piece of configuration information, to obtain a descrambled sequence; and performing a check operation by using the descrambled sequence and the DCI.
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公开(公告)号：US20210328659A1
公开(公告)日：2021-10-21
申请号：US17360529
申请日：2021-06-28
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04B7/185
Abstract: A data broadcast method includes obtaining, by a satellite base station, a plurality of pieces of data that are to be broadcast. The plurality of pieces of data are a same type of data including compensation values of Doppler frequency shifts, change rates of Doppler frequency shifts, transmission delays, change rates of transmission delays, timing advances TAs, change rates of TAs, or angles of a plurality of beams that respectively correspond to a plurality of beams generated by the satellite base station. The satellite base station determines reference data and a difference between each piece of data in the plurality of pieces of data and the reference data. The satellite base station sends first indication information and a plurality of pieces of second indication information to a terminal device. The first indication information indicates the reference data.
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公开(公告)号：US20200059245A1
公开(公告)日：2020-02-20
申请号：US16661832
申请日：2019-10-23
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Gongzheng ZHANG , Hejia LUO , Rong LI , Jian WANG , Jun WANG
Abstract: This application provides a polar code transmission method and apparatus. The method includes: transforming a to-be-processed bit sequence at two or more different granularities, where each specific manner at a first granularity is used to implicitly indicate one value in one level of time sequence information, and each specific manner at a second granularity is used to implicitly indicate one value in another level of time sequence information; and sending the transformed (processed) bit sequence, so that different encoded bit sequences can be obtained, and more versions of time sequence information can be implemented, thereby meeting a requirement of transmission in a plurality of levels of time sequences.
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