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公开(公告)号:EP4054105A1
公开(公告)日:2022-09-07
申请号:EP20896687.9
申请日:2020-11-10
发明人: WANG, Yu , ZHOU, Jianwei , QIAO, Yunfei , LUO, Hejia , WANG, Jun
IPC分类号: H04L5/00
摘要: Embodiments of this application provide an information transmission method, a communication apparatus, and a computer-readable storage medium. The method includes: A receiving apparatus receives a synchronization signal and cell-specific information that are sent by a sending apparatus on a first beam, where the cell-specific information includes indication information, and the indication information indicates whether there is beam-specific information; and if the indication information indicates that there is the beam-specific information, the receiving apparatus receives beam-specific information that is of a second beam and that is sent by the sending apparatus on the second beam. Because the beam-specific information does not include synchronization information or an MIB, and the beam-specific information may identify the second beam, redundancy of information sent by the sending apparatus in time division on the first beam and a plurality of second beams included in the first beam is greatly reduced, thereby reducing resource overheads of broadcasting signaling by the sending apparatus.
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公开(公告)号:EP4027689A1
公开(公告)日:2022-07-13
申请号:EP20872014.4
申请日:2020-09-15
发明人: ZHOU, Jianwei , QIAO, Yunfei , LUO, Hejia , XU, Chenlei
摘要: This application provides a beam handover method, an apparatus, and a communications device. A terminal device receives first indication information sent by a network device, where the first indication information includes a first parameter value of a first beam, and the first parameter value is a compensation amount of a frequency offset that is of the first beam and that is generated by relative motion between the terminal device and the network device; and the terminal device calculates a receive frequency of the first beam based on the first parameter value, or the terminal device calculates a transmit frequency of the first beam based on the first parameter value. This can effectively avoid communication interruption caused by inter-beam frequency hopping when the terminal device performs beam handover, and ensure communication reliability.
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公开(公告)号:EP4412364A1
公开(公告)日:2024-08-07
申请号:EP22885551.6
申请日:2022-09-26
发明人: CHEN, Ying , ZHOU, Jianwei , LI, Rong , WANG, Jun
IPC分类号: H04W72/04
CPC分类号: H04W72/53 , H04W72/231 , H04W72/0453 , H04W72/04
摘要: This application provides a communication method and apparatus, and relates to the field of wireless communication technologies, to flexibly configure a bandwidth for a terminal device, and adapt to a service change on a terminal device side. The method includes: The terminal device receives first information from an access network device. The first information indicates that at least two frequency resources in a plurality of frequency resources are activated, and the plurality of frequency resources are preconfigured. Then, the terminal device performs a data transmission with the access network device on a first frequency resource. The at least two frequency resources indicated by the first information include the first frequency resource.
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公开(公告)号:EP4307821A1
公开(公告)日:2024-01-17
申请号:EP22783904.0
申请日:2022-03-28
发明人: CHEN, Ying , QIAO, Yunfei , ZHOU, Jianwei , WANG, Xiaolu , WANG, Jun
IPC分类号: H04W74/08
摘要: This application provides a communication parameter indication method and apparatus, to resolve a problem that terrestrial network related communication parameters do not adapt to non-terrestrial network communication. The method includes: obtaining first information, where the first information requests a first parameter of a terminal device, and the first parameter includes at least one of the following: location information of the terminal device and a parameter related to a timing advance TA, where the parameter related to the TA is determined based on a round-trip transmission delay between a first reference point and the terminal device, or the parameter related to the TA is determined based on a round-trip transmission delay between a network device and the terminal device; sending second information based on the first information, where the second information indicates the first parameter; and obtaining third information, where the third information indicates a timing offset, the timing offset is for determining a scheduling delay degree of sending information by the terminal device, and the timing offset is related to at least one of a communication parameter corresponding to a cell in which the terminal device is located and the first parameter.
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公开(公告)号:EP4123920A1
公开(公告)日:2023-01-25
申请号:EP21785273.0
申请日:2021-03-29
发明人: LUO, Hejia , WANG, Xiaolu , CHEN, Ying , ZHOU, Jianwei , DU, Yinggang
摘要: 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. In different processes of communicating with the satellite, the communication apparatus can obtain the location information and motion information of the satellite with different accuracy, and communicate with the satellite. Communication quality during the uplink communication performed by the communication apparatus with the satellite can be met, and the security of the high-accuracy location information of the satellite can be improved.
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公开(公告)号:EP4044762A1
公开(公告)日:2022-08-17
申请号:EP20885884.5
申请日:2020-11-09
发明人: WANG, Xiaolu , LUO, Hejia , XU, Chenlei , ZHOU, Jianwei , SHI, Xueliang
IPC分类号: H04W84/06
摘要: Embodiments of this application provide a satellite communication method and a related device. The satellite communication method includes: receiving a first common timing advance common TA parameter and a first common TA change amount calculation parameter, where the first common TA parameter is used to obtain a first common TA, and the first common TA change amount calculation parameter is used to update the first common TA to obtain an updated common TA; and sending a random access preamble by using the updated common TA. The solutions provided in the embodiments of this application help improve timeliness of the common TA used for sending the random access preamble, and further help reduce an occurrence probability of inter-symbol interference.
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公开(公告)号:EP4044454A1
公开(公告)日:2022-08-17
申请号:EP20885765.6
申请日:2020-10-12
发明人: ZHOU, Jianwei , LUO, Hejia , XU, Chenlei , WANG, Xiaolu , WANG, Jun
IPC分类号: H04B7/185
摘要: Embodiments of this application provide a network switching method and an apparatus. 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 further the first network device can obtain switching information based on the user information and the like, so that 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. In this beam switching, procedures such as measurement, reporting the user information, and receiving switched beams allocated by the network device, as in the conventional technology do not need to be performed. Therefore, signaling procedures and overheads of the network can be reduced, so that a switching response time can be reduced.
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公开(公告)号:EP4030717A1
公开(公告)日:2022-07-20
申请号:EP20871544.1
申请日:2020-09-30
发明人: XU, Chenlei , ZHOU, Jianwei , LUO, Hejia , WANG, Xiaolu
IPC分类号: H04L27/26
摘要: A satellite communication method and a related device are provided. The 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 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; and the subsequence A includes at least one preamble symbol, the subsequence B includes at least one preamble symbol, 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; and outputting the random access preamble sequence. In solutions of embodiments of this application, a random access preamble sequence that includes a plurality of preamble symbols and that has an anti-frequency offset capability is designed, and the random access preamble sequence includes preamble symbols generated by using different ZC sequences, so that the sequence has a good anti-frequency offset capability.
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公开(公告)号:EP4024972A1
公开(公告)日:2022-07-06
申请号:EP20870353.8
申请日:2020-09-04
发明人: ZHOU, Jianwei , LUO, Hejia , XU, Chenlei , WANG, Xiaolu
IPC分类号: H04W56/00
摘要: This application provides a satellite communication method and an apparatus. The method includes: receiving, by a terminal device, first information sent by a satellite, where the first information is used to indicate a first timing change rate range; measuring and obtaining, by the terminal device, a first downlink timing change rate; determining a first uplink timing change rate based on the first downlink timing change rate and the first timing change rate range; and performing uplink communication with the satellite based on the first uplink timing change rate. The method can effectively resolve a problem of uplink timing drift and improve uplink performance.
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公开(公告)号:EP4024744A1
公开(公告)日:2022-07-06
申请号:EP20869257.4
申请日:2020-09-08
发明人: ZHOU, Jianwei , XU, Chenlei , LUO, Hejia , WANG, Xiaolu
摘要: Embodiments of this application provide a transmission method and apparatus, and relate to the communication field. The method 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. Therefore, a manner of determining a proper guard bandwidth is proposed, to reduce interference between a PUSCH and a PRACH and meet a communication requirement of a non-terrestrial communication system.
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