Huawei Technologies Co., Limited

Hejia Luo

Rong Li

Ying Chen

Jian Wang

Gongzheng Zhang

Yunfei Qiao

Xiaolu Wang

Jianwei Zhou

Huazi Zhang

Chenlei Xu

Lingchen Huang

Yue Zhou

Yinggang Du

Yu Wang

Jian Jun Wang

Shengchen Dai

Bin Wang

Yourui Huangfu

Zukang Shen

Chen Xu

Chaolong Zhang

Aleksei Eduardovich Maevskii

Vladimir Vitalievich Gritsenko

Chuili Kong

Rongdao Yu

Xian Meng

Guangzhu Zeng

Nikita Andreevich Polianskii

Mikhail Sergeevich Kamenev

Xueliang Shi

Mikhail Kamenev

Nikita Polianskii

Bin Li

Jun Wang

Xiaoyan Bi

Lu Rong

Dageng Chen

Xiaocheng Liu

Jie Jin

Jie Sheng

Zhenjun Jiang

Yourui Haungfu

Aleksei Maevskii

Vladimir Gritsenko

A bandwidth part switching method, is applicable to a non-terrestrial network (NTN) to implement BWP switching based on multi-color frequency-division multiplexing. In the method, a terminal device may report, in a second BWP to a network device, an index of a first SSB whose signal quality is greater than or equal to a first threshold in one or more SSBs in a first BWP, and switch from the second BWP to a third BWP. The one or more SSBs correspond to at least one BWP other than the first BWP, and the third BWP is in the at least one BWP and corresponds to the first SSB. After receiving the index of the first SSB in the second BWP, the network device determines the third BWP, and performs service data transmission with the terminal device in the third BWP.

Bandwidth part switching method, apparatus, and system

A communication method and apparatus are provided, and relate to the field of wireless communication technologies, to resolve a problem in a conventional technology that communication quality during communication between a satellite and a communication apparatus cannot be ensured, and to ensure security of high-accuracy location information of the satellite. In the method, the communication apparatus may perform random access to the satellite based on first location information. The communication apparatus may perform uplink communication with the satellite based on obtained second location information. Accuracy of a location obtained based on the second location information is higher than accuracy of a location obtained based on the first location information. Based on this solution, required accuracy of location information of the satellite is different.

Communication method and apparatus

A first communication apparatus obtains first ephemeris information of a second communication apparatus, where the first ephemeris information includes information about m parameters of n parameters in second ephemeris information, n is equal to 6, and m is a positive integer less than n, and the n parameters include a first location parameter, a first location parameter, and a first location parameter in first location information, and a first velocity parameter, a first velocity parameter, and a first velocity parameter in first velocity information. The first communication apparatus determines values of the n parameters in the second ephemeris information based on the first ephemeris information, where the values of the n parameters include values of the m parameters and values of remaining n−m parameters. The first communication apparatus communicates with the second communication apparatus based on the second ephemeris information.

Wireless communication method and apparatus

Embodiments of this application provide a communication method and apparatus. In the method, a terminal device receives a first signal, and detects F frames of the first signal to obtain a first resource. F may be a multiplexing factor, such as a frequency/polarization multiplexing factor. The terminal device performs detection based on a frame number of the first resource to obtain a second resource. The first resource and the second resource may be a same resource.

Method and apparatus for detecting a signal based on a multiplexing factor

This application provides a gateway handover method and an apparatus, to ensure the reliability of a gateway handover of a terminal device and reduce hardware overheads in a gateway handover process. The terminal device receives a synchronization signal/PBCH (physical broadcast channel) block (SSB) from a network device through a service link. The SSB includes an SSB of a source gateway and an SSB of at least one candidate target gateway. The terminal device obtains a measurement value of channel quality corresponding to the SSB of the at least one candidate target gateway, and sends a measurement result to the network device. The network device forwards the measurement result to the source gateway, which determines, based on the measurement result, whether to hand over the terminal device from the source gateway to one of the at least one candidate target gateway.

Gateway handover method and apparatus

An uplink signal sending and receiving method includes that a first communication apparatus obtains a first timing advance (TA) change rate, and sends an uplink signal in a plurality of first time periods. There is a first time interval between the plurality of first time periods to compensate for a time synchronization drift. A length of the first time interval and a location of the first time interval between the plurality of first time periods are determined based on the first TA change rate, and the first TA change rate is a TA change rate in a communication process of the first communication apparatus.

Uplink signal sending and receiving method, and apparatus

This disclosure provides satellite communication methods and apparatuses. One example method includes that a terminal device determines a first time offset of a first random access response window based on a distance information between a satellite base station and the ground. Based on the first time offset and the first random access response window, the terminal device receives a random access response sent by the satellite base station.

Satellite communication method and apparatus

A terminal determines a first frequency for accessing the network device Then, the terminal determines at least one second frequency based on the first frequency, where any second frequency is different from the first frequency, and at least two second frequencies are also different. The terminal selects at least two different second frequencies from the first frequency and the at least one second frequency. The terminal separately receives, in a time unit in a period by using the at least two different frequencies, an SSB from the network device. The terminal accesses the network device based on received one or more different SSBs.

A random access method includes sending a random access preamble to a base station on a first time domain resource, obtaining an index value of the first time domain resource, obtaining an index difference between the first time domain resource and a second time domain resource, obtaining an index value of the second time domain resource by adding the index value of the first time domain resource and the index difference, obtaining a random access radio network temporary identifier (RA-RNTI) based on the index value of the second time domain resource, receiving a random access response (RAR) from the base station, and descrambling a cyclic redundancy check (CRC) code of the RAR using the RA-RNTI.

Random access method and apparatus, device, and storage medium

A timing offset parameter update method, a device, and a system are provided, which relate to the field of communication technologies, to help reduce signaling overhead 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, wherein 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, wherein 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.

Timing offset parameter update method, device, and system

A method and a communication apparatus for determining a timing advance. A downlink signal is received from a network device. A first reference moment of a signal period of the downlink signal is determined, where the first reference moment includes a start receiving moment of the signal period. A first time interval between the start receiving moment and a start moment of a first period in which the terminal is located is determined. Based on the first time interval, determining whether a start sending moment of the signal period is within the first period, and determining the start sending moment, where a period is a duration distributed at an equal interval on a time axis. A timing advance is determined based on the start receiving moment and the start sending moment, and an uplink signal is sent based on the timing advance.

Method for determining timing advance and communication apparatus

This application provides example network resource configuration methods and apparatuses. One example method includes receiving configuration information from a network device, where the configuration information includes information of a first threshold corresponding to at least one candidate cell, and the first threshold includes at least one of a Doppler frequency shift threshold, a timing advance TA rate threshold, or a Doppler frequency shift change rate threshold. A target cell is determined from the at least one candidate cell based on the configuration information. A handover to the target cell is initiated.

Network resource configuration method and apparatus

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.

Random access preamble configuration method applicable to satellite network, and apparatus

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.

Signal sending and processing method and apparatus

The present disclosure relates to access methods and apparatuses. In one example method, a terminal device determines, based on whether a first frequency offset parameter is in a frequency offset parameter range, whether to access a first cell. If the first frequency offset parameter is in the frequency offset parameter range, a current location of the terminal device is not at an edge of the cell. Otherwise, the current location of the terminal device may be at the edge of the cell.

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Hangzhou, China

Hejia Luo