公开(公告)号：US20240389151A1

公开(公告)日：2024-11-21

申请号：US18787707

申请日：2024-07-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hejia Luo ,  Xiaolu Wang ,  Yu Wang ,  Jun Wang

IPC: H04W74/0816 ,  H04W8/22 ,  H04W56/00 ,  H04W74/08

Abstract: This application provides a communication method and a communication apparatus, to reduce TA error accumulation caused by an open-loop adjustment manner, reduce intersymbol interference of an uplink signal, and improve stability of a communication system. In the method, a terminal device receives and obtains first configuration information, where the first configuration information includes time domain information of a first transmission opportunity; the terminal device sends a first signal, where the first signal is used to determine TA information; the terminal device obtains the TA information; and the terminal device determines a TA between the terminal device and a network device based on the TA information, where the TA is used for data transmission after a time domain start location corresponding to the time domain information of the first transmission opportunity.

公开(公告)号：US20230224843A1

公开(公告)日：2023-07-13

申请号：US18182885

申请日：2023-03-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaolu Wang ,  Hejia Luo ,  Rong Li ,  Jun Wang

IPC: H04W56/00

CPC classification number: H04W56/005 ,  H04W56/0015

Abstract: Embodiments of this application provide a timing offset parameter update method, a device, and a system, and relate to the field of communication technologies, to help reduce signaling overheads generated when a network device updates a value of a timing offset parameter. The method includes: A terminal device obtains first information that includes a first reference value and first indication information, where the first indication information indicates an update rule of a timing offset parameter, and the first reference value is an initial value of the timing offset parameter. The terminal device updates a value of the timing offset parameter based on the first information and a timing offset variation, to obtain an updated value of the timing offset parameter, where an absolute value of the timing offset variation is equal to an absolute value of a difference between any two consecutively updated values of the timing offset parameter.

公开(公告)号：US12218816B2

公开(公告)日：2025-02-04

申请号：US17886739

申请日：2022-08-12

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaolu Wang ,  Hejia Luo ,  Ying Chen ,  Rong Li ,  Bin Wang

IPC: H04W4/00 ,  H04L43/0864

Abstract: Embodiments of this application provide a timing advance determining method and a communication apparatus, to improve precision of calculating a timing advance (TA) by a terminal, and reduce inter-symbol interference (ISI). The method includes: A first network device determines a first parameter based on a first delay compensation value, where the first delay compensation value is a delay compensation made by the first network device for receiving a signal sent by a terminal, the first parameter indicates a difference between a round-trip delay of a feeder link in a non-terrestrial network NTN and the first delay compensation value, and the difference is used to determine a TA used by the terminal for signal sending; and the first network device sends the first parameter.

公开(公告)号：US12149396B2

公开(公告)日：2024-11-19

申请号：US17738863

申请日：2022-05-06

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianwei Zhou ,  Chenlei Xu ,  Hejia Luo ,  Xiaolu Wang

IPC: H04L27/26 ,  H04W56/00 ,  H04W74/0833

Abstract: A terminal apparatus is provided. The terminal apparatus obtains synchronization signal and physical broadcast channel (PBCH) blocks (SSBs) in a plurality of beams; then determines a target beam in the plurality of beams based on an association relationship between an SSB index and a first random access preamble, where the first random access preamble is determined based on a cyclic shift and/or an order of symbols; and finally sends the random access preamble by using the target beam to initiate a random access request. A communication device receives the first random access preamble in the random access request sent by the terminal apparatus, and then, determines, based on the association relationship, the target beam accessed by the terminal apparatus. The first random access preamble is determined based on the cyclic shift and/or the order of symbols.

公开(公告)号：US20230403069A1

公开(公告)日：2023-12-14

申请号：US18458161

申请日：2023-08-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yu Wang ,  Hejia Luo ,  Yunfei Qiao ,  Ying Chen ,  Xiaolu Wang ,  Rong Li

IPC: H04B7/185 ,  H04W64/00 ,  H04W72/0446

CPC classification number: H04B7/18513 ,  H04B7/18519 ,  H04W64/00 ,  H04W72/0446

Abstract: In a communication method, to meet a requirement of a positioning service, a first communication apparatus obtains data to be processed, and determines a first frame structure that includes a communication time period and a positioning time period. A first switching time period is included between the communication time period and the positioning time period, a 1st time-domain symbol occupied by the first switching time period is consecutive to a last time-domain symbol occupied by the communication time period, and a last time-domain symbol occupied by the first switching time is consecutive to a 1st time-domain symbol occupied by the positioning time period. The first communication apparatus then processes the data based on the first frame structure.

公开(公告)号：US11770159B2

公开(公告)日：2023-09-26

申请号：US17882200

申请日：2022-08-05

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ying Chen ,  Jianwei Zhou ,  Hejia Luo ,  Xiaolu Wang ,  Rong Li ,  Jun Wang

IPC: H04W56/00 ,  H04B7/01 ,  H04L5/00

CPC classification number: H04B7/01 ,  H04L5/0051 ,  H04W56/0035 ,  H04W56/0045

Abstract: This application discloses a frequency compensation method and apparatus, to improve performance of frequency compensation. The method includes: determining a change rate of a Doppler frequency shift value based on a weighted change rate of a change rate of a timing advance TA, determining the Doppler frequency shift value based on the change rate of the Doppler frequency shift value, and performing frequency compensation based on the determined Doppler frequency shift value; or determining a frequency offset value based on the Doppler frequency shift value with reference to pre-compensation and based on a reference signal, to further determine a frequency offset value, and performing frequency compensation based on the frequency offset value.

公开(公告)号：US11743854B2

公开(公告)日：2023-08-29

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

CPC classification number: H04W56/0045 ,  H04B7/18513 ,  H04W56/006

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：US12267741B2

公开(公告)日：2025-04-01

申请号：US17738810

申请日：2022-05-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jianwei Zhou ,  Hejia Luo ,  Chenlei Xu ,  Xiaolu Wang ,  Jun Wang

IPC: H04W36/32 ,  H04W36/00 ,  H04W36/14

Abstract: The present disclosure relates to network switching methods and apparatuses. In one example method, a beam that currently provides a service for a terminal device is a first beam. The first beam is generated by a first network device. The first network device obtains user information of the terminal device, and obtains switching information based on the user information. After the first network device sends the switching information to the terminal device, the terminal device can perform beam switching based on the switching information.

公开(公告)号：US12199804B2

公开(公告)日：2025-01-14

申请号：US17704444

申请日：2022-03-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaolu Wang ,  Rong Li ,  Hejia Luo ,  Bin Wang ,  Jun Wang

IPC: H04L27/26 ,  H04L5/00 ,  H04W4/06

Abstract: Example communication methods and apparatus are described. One example method includes generating a first signal and sending a first signal, where the first signal includes an orthogonal frequency division multiplexing (OFDM) symbol, a first-type cyclic prefix (CP), and a second-type CP. CP resources of the first-type CP include two types of CP resources: a first CP resource and a second CP resource. CP resources of the second-type CP include one type of CP resource, that is, the second CP resource. The first CP resource may be used to carry data that is different from data carried on the OFDM symbol. The second CP resource may be used to carry data that is the same as the data carried on the OFDM symbol.

公开(公告)号：US12166569B2

公开(公告)日：2024-12-10

申请号：US18176642

申请日：2023-03-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Chenlei Xu ,  Hejia Luo ,  Jianwei Zhou ,  Xiaolu Wang ,  Jun Wang

IPC: H04B7/204 ,  H04B7/06 ,  H04W52/02

Abstract: This application provides a satellite communication method and apparatus. A terminal obtains a level-1 broadcast signal from a satellite, where a beam status corresponding to the level-1 broadcast signal is an energy saving state, and the level-1 broadcast signal includes synchronization information. The terminal obtains a level-2 broadcast signal from the satellite, where a beam status corresponding to the level-2 broadcast signal is a broadband communication state. The terminal communicates with the satellite based on the level-2 broadcast signal.