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公开(公告)号：EP4447600A1
公开(公告)日：2024-10-16
申请号：EP22914430.8
申请日：2022-12-21
发明人： LUO, Hejia , WANG, Xiaolu , MENG, Xian , WANG, Yu , WANG, Jun , LI, Rong
IPC分类号： H04W74/08
摘要： This application provides a communication method and a communication apparatus, to reduce occurrence of a random access failure when a signal coverage area corresponding to a broadcast signal sent by a network device may change, to improve stability of a communication system. In the method, a terminal device obtains first information. The first information is used to determine an access range corresponding to a first signal. If the terminal device is located in the access range after a first moment, the terminal device sends a first random access preamble. The first random access preamble is associated with the first signal.
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公开(公告)号：EP4408062A1
公开(公告)日：2024-07-31
申请号：EP22880106.4
申请日：2022-09-20
发明人： LUO, Hejia , WANG, Yu , WANG, Xiaolu , WANG, Jun
摘要： This application provides a communication method and apparatus, and relates to the field of wireless communication technologies, so that relaxed measurement can be triggered in time, thereby reducing power consumption of a terminal device. The method includes: The terminal device receives configuration information from an access network device, where the configuration information indicates first information and coverage time of a beam in a region in which the terminal device is located, the first information is used to determine information for triggering radio resource management RRM relaxed measurement, and the beam includes at least one of the following: a camping beam of the terminal device, an adjacent beam of the camping beam, a serving beam of the terminal device, an adjacent beam of the serving beam, or a beam that is to cover the region in which the terminal device is located; and the terminal device performs RRM relaxed measurement on the beam based on the first information and the coverage time.
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公开(公告)号：EP4231751A1
公开(公告)日：2023-08-23
申请号：EP21899949.8
申请日：2021-11-26
发明人： QIAO, Yunfei , WANG, Xiaolu , WANG, Yu , WANG, Jun
IPC分类号： H04W72/08
摘要： This application discloses a wireless communication method, apparatus, and system, applied to a wireless communication network. The wireless communication network includes at least two access nodes. The method includes: A first access node obtains a first communication resource corresponding to a first terminal device, where the first communication resource is used to provide a network function service for the first terminal device; the first access node generates a first record based on the first communication resource; and the first access node sends the first record to another access node in the wireless communication network. According to this method, the first record including the first communication resource is sent to another access node in an access network instead of a core network element of a terrestrial station. A distance between the first access node and the another access node in the radio access network is shorter than a distance to the terrestrial core network element. Therefore, transmission overheads can be effectively reduced, and a transmission latency can be effectively shortened, so that wireless communication efficiency is improved.
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公开(公告)号：EP4207861A1
公开(公告)日：2023-07-05
申请号：EP21879419.6
申请日：2021-10-13
发明人： WANG, Xiaolu , LUO, Hejia , ZHOU, Jianwei , LI, Rong , WANG, Jun
IPC分类号： H04W24/02
摘要： Embodiments of this application disclose a parameter update method, including: A terminal apparatus receives a parameter that is configured by a network apparatus and that is used to calculate an update period, where the update period is used to indicate time at which the terminal apparatus receives an uplink time-frequency synchronization parameter; and the terminal apparatus receives an updated uplink time-frequency synchronization parameter based on the update period. The network apparatus configures the parameter for calculating the update period, so that the terminal apparatus can update the uplink time-frequency synchronization parameter in time. This reduces an error of uplink time-frequency synchronization, and ensures communication quality.
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公开(公告)号：EP4203342A1
公开(公告)日：2023-06-28
申请号：EP21871243.8
申请日：2021-09-02
发明人： LUO, Hejia , WANG, Xiaolu , ZHOU, Jianwei , CHEN, Ying , XU, Chenlei , WANG, Jun
IPC分类号： H04B7/185
摘要： This application provides a frequency compensation method and a frequency compensation apparatus, to reduce signaling overheads for transmitting a frequency compensation value by a network device, and improve system performance. The method includes: The network device determines first information and sends the first information to a terminal device, where the first information indicates a frequency compensation manner of an uplink signal of the terminal device or the first information indicates a configuration parameter of the terminal device, the frequency compensation manner is a first frequency compensation manner or a second frequency compensation manner, a first compensation value corresponding to the first frequency compensation manner is a frequency offset generated by relative motion between the network device and the terminal device, and a second compensation value corresponding to the second frequency compensation manner is a difference between a first threshold and the frequency offset generated by relative motion between the network device and the terminal device. The terminal device receives the first information, and determines, based on the first information, the frequency compensation manner to be used to send the uplink signal. The terminal device performs frequency compensation for the uplink signal based on the frequency compensation manner.
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公开(公告)号：EP4102886A1
公开(公告)日：2022-12-14
申请号：EP21765235.3
申请日：2021-02-02
发明人： WANG, Xiaolu , LUO, Hejia , WANG, Yu , CHEN, Ying , SHI, Xueliang
IPC分类号： H04W36/00
摘要： Embodiments of this application provide a gateway station switching method and apparatus. When quality of a link from a terminal device to a source gateway station through a satellite is poor, the source gateway station sends third indication information to a target gateway station, so that the target gateway station feeds back second channel quality to the source gateway station, that is, quality of a link from the terminal device to the target gateway station through the satellite. The source gateway station determines, based on the second channel quality and first channel quality that represents the quality of the link from the terminal device to the source gateway station through the satellite, whether to switch the terminal device to the target gateway station. In this process, the source gateway station determines whether to switch the gateway station by comparing the quality of the link from the source gateway station to the terminal device through the satellite and the quality of the link from the target gateway station to the terminal device through the satellite, thereby improving communication quality.
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公开(公告)号：EP4061078A1
公开(公告)日：2022-09-21
申请号：EP20895523.7
申请日：2020-11-11
发明人： WANG, Xiaolu , LUO, Hejia , ZHOU, Jianwei , XU, Chenlei , WANG, Bin , LI, Rong
IPC分类号： H04W72/04
摘要： Embodiments of this application provide a random access preamble transmission method, an apparatus, and a storage medium. The method includes: A terminal device determines, based on a target sub-coverage area to which the terminal device belongs in a preset coverage area of a network device, target random access preamble format information corresponding to the target sub-coverage area. Then, the terminal device sends, to the network device on a target time-frequency resource indicated by target random access preamble time-frequency resource information corresponding to the target random access preamble format information, a random access preamble corresponding to the target random access preamble format information. It may be learned that, in embodiments of this application, any terminal device may send a random access preamble based on a target sub-coverage area to which the terminal device belongs in the preset coverage area of the network device and by using random access preamble format information corresponding to the target sub-coverage area, so that time-frequency resources used to transmit the random access preamble can be saved.
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公开(公告)号：EP4047851A1
公开(公告)日：2022-08-24
申请号：EP20885695.5
申请日：2020-10-28
发明人： ZHOU, Jianwei , XU, Chenlei , LUO, Hejia , WANG, Xiaolu
摘要： This application discloses a beam establishment method. A terminal apparatus obtains synchronization signal and 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. According to embodiments of this application, the first random access preamble is determined based on the cyclic shift and/or the order of symbols. This can increase a quantity of SSB indexes associated with one random access occasion RO, and reduce association duration between the RO and the SSB, so that a time interval at which the terminal apparatus initiates random access is reduced, and user experience is effectively improved.
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9.发明公开
公开(公告)号：EP4044750A1
公开(公告)日：2022-08-17
申请号：EP20884540.4
申请日：2020-10-30
发明人： XU, Chenlei , ZHOU, Jianwei , WANG, Xiaolu , LUO, Hejia
IPC分类号： H04W74/08
摘要： 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.
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公开(公告)号：EP4027532A1
公开(公告)日：2022-07-13
申请号：EP20871771.0
申请日：2020-09-15
发明人： WANG, Xiaolu , LUO, Hejia , ZHOU, Jianwei , XU, Chenlei
摘要： This application discloses a beam indication method and an apparatus, to increase a quantity of beams supported by a quantity of available SSBs of a system. The beam indication method and the apparatus are applicable to the field of satellite communication. The method includes: A terminal determines first random access information associated with a first synchronization broadcast block SSB 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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