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公开(公告)号：US20230283350A1
公开(公告)日：2023-09-07
申请号：US18315431
申请日：2023-05-10
发明人： Ying CHEN , Jianwei ZHOU , Hejia LUO , Yu WANG , Jun WANG
IPC分类号： H04B7/06 , H04L5/00 , H04B17/318
CPC分类号： H04B7/0639 , H04L5/0051 , H04B17/328
摘要： Embodiments of this application provide a channel matrix determining method, an apparatus, and a system, relating to the field of communication technologies, to resolve a technical problem that a manner in which a network device determines a precoding matrix based on an existing PMI indicator is not applicable to long-distance communication. The method includes: A terminal device obtains a plurality of reference signals, determines a first channel matrix based on the plurality of reference signals, and feeds back, to a network device, first information indicating some channel elements in the first channel matrix. The terminal device may further receive a downlink signal determined based on the first information and sent by the network device. A channel element in the some channel elements is determined based on signal strength and/or a time-frequency resource of the reference signal.
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公开(公告)号：US20230156822A1
公开(公告)日：2023-05-18
申请号：US18156941
申请日：2023-01-19
发明人： Jianwei ZHOU , Hejia LUO , Chenlei XU , Zhenjun JIANG
IPC分类号： H04W74/08
CPC分类号： H04W74/0841 , H04W74/0891
摘要： 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.
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公开(公告)号：US20230163935A1
公开(公告)日：2023-05-25
申请号：US18150930
申请日：2023-01-06
发明人： Zhenjun JIANG , Yunfei QIAO , Jianwei ZHOU , Chenlei XU
CPC分类号： H04L5/0098 , H04L5/023
摘要： 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.
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4.发明申请公开(公告)号：US20220312355A1
公开(公告)日：2022-09-29
申请号：US17830863
申请日：2022-06-02
发明人： Yu WANG , Jianwei ZHOU , Yunfei QIAO , Hejia LUO , Jun WANG
摘要： The disclosure provides information transmission methods and communication apparatuses. One example method includes that 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 which indicates whether there is beam-specific information, and the first beam comprises a plurality of second beams. In response to determining that the indication information indicates that there is the beam-specific information, the receiving apparatus receives beam-specific information of second beam of the plurality of second beams, where the beam-specific information is sent by the sending apparatus on the second beam, and the receiving apparatus is within coverage of the second beam. The receiving apparatus performs initial access using the synchronization signal, the cell-specific information, and the beam-specific information.
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公开(公告)号：US20220295434A1
公开(公告)日：2022-09-15
申请号：US17825817
申请日：2022-05-26
发明人： Xiaolu WANG , Hejia LUO , Chenlei XU , Jianwei ZHOU , Rong LI
摘要： 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.
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6.发明申请公开(公告)号：US20220264662A1
公开(公告)日：2022-08-18
申请号：US17738461
申请日：2022-05-06
发明人： Chenlei XU , Jianwei ZHOU , Xiaolu WANG , Hejia LUO
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：US20220264417A1
公开(公告)日：2022-08-18
申请号：US17738810
申请日：2022-05-06
发明人： Jianwei ZHOU , Hejia LUO , Chenlei XU , Xiaolu WANG , Jun WANG
摘要： 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.
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公开(公告)号：US20240236899A1
公开(公告)日：2024-07-11
申请号：US18430323
申请日：2024-02-01
发明人： Chenlei XU , Jianwei ZHOU , Zhenjun JIANG , Hejia LUO
CPC分类号： H04W56/005 , H04W56/0035 , H04W56/009 , H04W84/06
摘要： This application provides a timing advance update method, a terminal, and a base station. One example method includes receiving, a TA value; obtaining, a common TA change rate, and compensating for the TA value based on the common TA change rate; and sending an uplink signal based on a TA value obtained after compensation is performed.
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公开(公告)号：US20220286948A1
公开(公告)日：2022-09-08
申请号：US17825787
申请日：2022-05-26
发明人： Hejia LUO , Xiaolu WANG , Jianwei ZHOU , Chenlei XU , Ying CHEN , Rong LI
摘要： 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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公开(公告)号：US20220263701A1
公开(公告)日：2022-08-18
申请号：US17738863
申请日：2022-05-06
发明人： Jianwei ZHOU , Chenlei XU , Hejia LUO , Xiaolu WANG
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.
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