公开(公告)号：US20230156822A1

公开(公告)日：2023-05-18

申请号：US18156941

申请日：2023-01-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jianwei ZHOU ,  Hejia LUO ,  Chenlei XU ,  Zhenjun JIANG

IPC: H04W74/08

CPC classification number: H04W74/0841 ,  H04W74/0891

Abstract: This application discloses random access methods and communication apparatuses, and relates to the field of communication technologies. In an example method, after determining a correspondence between scanning periods of different scanning areas within coverage of a synchronization signal block (SSB) beam and random access occasions (ROs), a second communication apparatus sends, through broadcasting, a first message including information about the correspondence. A first communication apparatus receives the first message, determines an RO based on a scanning area in which the first communication apparatus is located and the first message, and initiates random access.

公开(公告)号：US20220167297A1

公开(公告)日：2022-05-26

申请号：US17671335

申请日：2022-02-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaolu WANG ,  Hejia LUO ,  Chenlei XU ,  Rong LI ,  Jun WANG

IPC: H04W56/00 ,  H04B7/185

Abstract: Example methods and apparatus for determining a timing advance are described. One example method includes obtaining ephemeris information of a satellite, where the ephemeris information includes coordinates of the satellite and an ephemeris error of the satellite. A timing advance is determined according to a preset rule based on the ephemeris information and location information of a terminal device, where the location information includes coordinates of the terminal device and a positioning error of the terminal device. The preset rule is determined by using a first horizontal distance, a first vertical distance, the ephemeris error, and the positioning error.

公开(公告)号：US20230232391A1

公开(公告)日：2023-07-20

申请号：US18187223

申请日：2023-03-21

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jianwei ZHOU ,  Hejia LUO ,  Chenlei XU ,  Xiaolu WANG ,  Jun WANG

IPC: H04W72/044 ,  H04L5/00 ,  H04B7/06

CPC classification number: H04W72/046 ,  H04L5/0091 ,  H04B7/0695

Abstract: This application provides example beam management methods, apparatus, and systems. In one example method, a terminal device can receive indication information from a network device. The terminal device can perform beam switching according to an arrangement order of transmission configuration indicator (TCI) states (TCI-states) in a second TCI list when the indication information is first indication information. Alternatively, the terminal device can perform beam switching according to a first TCI-state in a first TCI list when the indication information is second indication information, wherein the first TCI list comprises a plurality of TCI-states comprising the first TCI-state, and in the first TCI list, beams corresponding to TCI-states after the first TCI-state are to sequentially provide a service for the terminal device.

公开(公告)号：US20220408389A1

公开(公告)日：2022-12-22

申请号：US17820408

申请日：2022-08-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaolu WANG ,  Hejia LUO ,  Yunfei QIAO ,  Yinggang DU ,  Chenlei XU

IPC: H04W56/00

Abstract: This application provides a method and an apparatus for updating a timing offset, and is particularly applicable to an NTN network such as satellite communication. The terminal side method includes: A terminal receives a timing offset difference ΔKoffset, and updates a timing offset based on the ΔKoffset to obtain an updated timing offset. The network side method includes: A network device determines a timing offset difference ΔKoffset, and sends the ΔKoffset to a terminal device, wherein the ΔKoffset is used for the terminal device to update a timing offset.

公开(公告)号：US20220225332A1

公开(公告)日：2022-07-14

申请号：US17704555

申请日：2022-03-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jianwei ZHOU ,  Chenlei XU ,  Hejia LUO ,  Xiaolu WANG

IPC: H04W72/04

Abstract: The disclosure provides transmission methods and apparatuses. One example includes sending control signaling to a terminal device, to indicate the terminal device to send a physical uplink shared channel (PUSCH) on a first frequency band; and receiving the PUSCH sent by the terminal device on the first frequency band. The first frequency band includes at least one guard subcarrier. A quantity of the at least one guard subcarrier is determined based on a Doppler frequency shift of a beam covering the terminal device. The first frequency band is located on a frequency band corresponding to the beam.

公开(公告)号：US20220225261A1

公开(公告)日：2022-07-14

申请号：US17707568

申请日：2022-03-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Chenlei XU ,  Jianwei ZHOU ,  Hejia LUO ,  Xiaolu WANG

IPC: H04W56/00 ,  H04L27/26 ,  H04L5/00 ,  H04L25/02

Abstract: This application discloses example signal sending methods and apparatuses, and example signal processing methods and apparatuses. One example method includes generating, by a terminal device, a channel sounding reference signal (SRS). The terminal device can then send the SRS to a target base station, where the target base station detects, by using the SRS, that a change range of an uplink timing location of the terminal device is not less than a length of one SRS symbol.

公开(公告)号：US20230163935A1

公开(公告)日：2023-05-25

申请号：US18150930

申请日：2023-01-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhenjun JIANG ,  Yunfei QIAO ,  Jianwei ZHOU ,  Chenlei XU

IPC: H04L5/00 ,  H04L5/02

CPC classification number: H04L5/0098 ,  H04L5/023

Abstract: The present disclosure relates to methods for indicating a direct current subcarrier and communication apparatuses. In one example method, a second communication apparatus may explicitly or implicitly indicate a location of a first direct current subcarrier and a location of a second direct current subcarrier to a first communication apparatus. The first direct current subcarrier is a direct current subcarrier corresponding to a transmit frequency used by the second communication apparatus. The second direct current subcarrier is a direct current subcarrier corresponding to a receive frequency used by the first communication apparatus.

公开(公告)号：US20230043937A1

公开(公告)日：2023-02-09

申请号：US17961642

申请日：2022-10-07

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hejia LUO ,  Xiaolu WANG ,  Chenlei XU ,  Yu WANG ,  Ying CHEN ,  Yinggang DU ,  Jun WANG

IPC: H04W74/08 ,  H04W76/10

Abstract: The technology of this application relates to a random access method, applied to the communication field. The method includes a terminal device sends, to a network device, a first message used to establish a wireless connection, the terminal device receives, a connection response sent by the network device, where the connection response includes information about a first polarization parameter, and when accessing the network device based on the connection response, the terminal device determines, based on the information about the first polarization parameter included in the connection response, whether the terminal device is qualified to access the network device. A dimension, namely, a polarization parameter, is introduced into a random access procedure, so that a preamble capacity is increased, a problem that the network device cannot identify a colliding terminal device is alleviated, and efficiency of establishing a communication connection between the terminal device and the network device is improved.

公开(公告)号：US20220295434A1

公开(公告)日：2022-09-15

申请号：US17825817

申请日：2022-05-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaolu WANG ,  Hejia LUO ,  Chenlei XU ,  Jianwei ZHOU ,  Rong LI

IPC: H04W56/00 ,  H04W16/28 ,  H04W36/00

Abstract: Example communication methods and apparatus are described. In one example method, a terminal receives a first information by using a serving beam, where the first information indicates a delay compensation parameter corresponding to a target beam. The target beam and the serving beam are different beams. The terminal determines, based on a full timing advance and the delay compensation parameter corresponding to the target beam, a differential timing advance corresponding to the target beam.

公开(公告)号：US20220264662A1

公开(公告)日：2022-08-18

申请号：US17738461

申请日：2022-05-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Chenlei XU ,  Jianwei ZHOU ,  Xiaolu WANG ,  Hejia LUO

IPC: H04W74/08 ,  H04W72/04 ,  H04L27/26

Abstract: This application discloses a random access preamble configuration method applicable to a satellite network and a communication apparatus. In the method, a random access preamble location offset and duration of a PRACH occasion can be flexibly configured based on features of a satellite system. The method includes: A receiving apparatus receives first indication information, where the first indication information includes indication information used to identify the random access preamble location offset at the physical random access channel PRACH occasion. The receiving apparatus transmits a random preamble based on the first indication information, where the random preamble includes a sequence part and a guard time. Because a communication distance is relatively long and a transmission delay difference between users is relatively large in a satellite communication system, time domain resources occupied by the PRACH occasion can be minimized by using this method.