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公开(公告)号：EP4391467A1
公开(公告)日：2024-06-26
申请号：EP22866515.4
申请日：2022-09-01
发明人： LIU, Fengwei , XU, Minghui , ZHANG, Jiayin
摘要： A communication method and apparatus are provided. The method includes: A terminal device obtains first information and second information, where the first information is used to determine a length of a first-type symbol component, the second information is used to determine at least one of a length of a second-type symbol component and a length of a third-type symbol component, and the length of the first-type symbol component is greater than the length of the third-type symbol component. The terminal device determines a plurality of signal blocks based on the first information and the second information, and processes each of the plurality of signal blocks to obtain an OFDM symbol corresponding to the signal block. The terminal device sends the OFDM symbol. According to the foregoing method, an FFT receive window corresponding to a first OFDM symbol can be delayed backwards compared with a conventional FFT receive window, to reduce inter-symbol interference on the first OFDM symbol.
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公开(公告)号：EP4354753A1
公开(公告)日：2024-04-17
申请号：EP22852049.0
申请日：2022-07-29
发明人： CHEN, Lei , LIU, Fengwei
IPC分类号： H04B7/0452
CPC分类号： H04B7/0452 , Y02D30/70
摘要： This application provides a precoding processing method and a communication apparatus, and relates to the field of communication technologies. A sending apparatus may determine precoding information, where the precoding information may include one or more of the following: a precoding codebook, a power of a precoding port, a power of a precoding data stream, and a correspondence between the precoding port and the precoding data stream, where one or more precoding ports correspond to one precoding data stream. The sending apparatus transmits precoding information to a receiving apparatus, so that the receiving apparatus can transmit downlink data with reference to the precoding information. In this application, the sending apparatus feeds back more types of precoding information, so that the receiving device obtains more reference information when transmitting the downlink data. In addition, each precoding port corresponds to one precoding data stream, so that a feature of a low peak to average power ratio PAPR of the precoding codebook can be ensured.
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公开(公告)号：EP4311124A1
公开(公告)日：2024-01-24
申请号：EP22787455.9
申请日：2022-04-08
发明人： LIU, Fengwei
IPC分类号： H04B7/155
摘要： Embodiments of this application provide a signal forwarding method, a relay device, and a communication system, and relate to the field of communication technologies. The relay device determines a first time domain resource based on first resource information; and determines a first forwarding gain corresponding to the first resource information based on an association relationship between a forwarding gain and resource information, where the resource information includes one or more of the following: signal information, channel information, a time domain resource number, backhaul beam information, and access beam information; and forwards a received signal on the first time domain resource by using the first forwarding gain. In this application, the relay device forwards, based on forwarding gains corresponding to different resource information, a signal received on the first time domain resource. A coverage enhancement capability of the relay device can be improved in this manner.
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公开(公告)号：EP4266787A1
公开(公告)日：2023-10-25
申请号：EP21918608.7
申请日：2021-01-15
发明人： YUAN, Shitong , LIU, Fengwei
IPC分类号： H04W72/04
摘要： This application discloses a communication method and apparatus based on integrated access and backhaul. The method includes: An IAB node reports first information to a donor node of the IAB node, where the first information indicates a first condition, and the first condition is a condition under which an MT of the IAB node and a DU of the IAB node work synchronously; and under the first condition, the DU of the IAB node communicates with a lower-level node of the IAB node or a terminal device, and synchronously, the MT of the IAB node communicates with an upper-level node of the IAB node. The technical solutions provided in this application can effectively ensure that the MT of the IAB node and the DU of the IAB node work synchronously.
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公开(公告)号：EP4213424A1
公开(公告)日：2023-07-19
申请号：EP20958271.7
申请日：2020-10-22
发明人： LIU, Fengwei , XU, Minghui
摘要： This application provides a signal transmission method and apparatus, to propose a diversity transmission solution. A transmitting end groups a plurality of modulation symbols into a plurality of groups of modulation symbols, and adds one or more preset symbols to each group of modulation symbols to obtain extended symbols. Then, the transmitting end performs second-level precoding on at least one group of extended symbols corresponding to each group of antenna ports, to obtain a symbol corresponding to each antenna port in each group of antenna ports. In second-level precoding, a dimension of a precoding matrix for each group of precoding antenna ports is related to a quantity of groups and a quantity of antenna ports included in the group of antenna ports. Finally, the transmitting end sends the symbol corresponding to each antenna port. Locations of a plurality of groups of modulation symbols corresponding to each group of antenna ports in the extended symbols do not overlap locations of at least one group of modulation symbols corresponding to any other group of antenna ports in the at least one group of extended symbols. Therefore, diversity transmission is implemented.
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公开(公告)号：EP4156616A1
公开(公告)日：2023-03-29
申请号：EP22190561.5
申请日：2018-08-25
发明人： LIU, Fengwei , CHEN, Lei
摘要： This application discloses a signal transmission method, including: obtaining, by a terminal device, to-be-transmitted data, uplink control information, and a demodulation reference signal; mapping the to-be-transmitted data, the uplink control information, and the demodulation reference signal to generate multiplexed symbols, where the multiplexed symbols include discrete Fourier transform spread orthogonal frequency division multiplexing DFT-s-OFDM symbols or orthogonal frequency division multiplexing OFDM symbols, N first multiplexed symbols are located on one side or two sides of a second multiplexed symbol, a location relationship between each of the N first multiplexed symbols and the second multiplexed symbol satisfies a mapping condition, N is an integer greater than or equal to 1, the first multiplexed symbol is a multiplexed symbol to which the uplink control information is mapped, and the second multiplexed symbol is a multiplexed symbol to which the demodulation reference signal is mapped; and transmitting the multiplexed symbols on a physical uplink shared channel. According to the technical solutions of this application, UCI demodulation performance can be improved.
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公开(公告)号：EP4106403A1
公开(公告)日：2022-12-21
申请号：EP20918995.0
申请日：2020-02-12
发明人： YUAN, Shitong , LIU, Fengwei , QIU, Jing
IPC分类号： H04W36/08
摘要： This application discloses a communication method and a communication apparatus. The communication method includes: An IAB node receives first configuration information from a source donor base station, where the first configuration information includes N pieces of configuration information of an MT and N pieces of configuration information of a DU that are configured by N target donor base stations for the IAB node; and the DU of the IAB node uses one piece of configuration information in the N pieces of configuration information of the DU when the MT of the IAB node satisfies a specific condition, where N is greater than or equal to 1, the MT is configured to communicate with a parent node of the IAB node, the source donor base station, or the target donor base station, and the DU is configured to communicate with a child node of the IAB node or a terminal. According to the method, in a process of implementing cross-donor base station handover of the IAB node, a conflict between a resource for the DU of the IAB node to send an SSB and a resource for the MT of the IAB node to send an SSB can be avoided, thereby avoiding a communication exception of a terminal as much as possible.
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公开(公告)号：EP4017162A1
公开(公告)日：2022-06-22
申请号：EP19941216.4
申请日：2019-08-30
发明人： LIU, Fengwei , YUAN, Shitong , QIU, Jing
摘要： A resource indication method and apparatus are provided, to implement resource indication in a case in which a DU has a plurality of cells. The method includes: A first node receives indication information sent by a second node, where the indication information is used to indicate availability of a dynamic resource in first resources corresponding to P cells, the first resource is a transmission resource used by the first node to communicate with a third node, the second node is an upper-level node of the first node, and the third node is a lower-level node of the first node. The first node determines, in N included cells, the P cells indicated by the indication information, and determines the availability of the dynamic resource in the first resources of the P cells based on the indication information, where 1≤P≤N.
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公开(公告)号：EP3962009A1
公开(公告)日：2022-03-02
申请号：EP20835506.5
申请日：2020-06-11
发明人： LIU, Fengwei , HUANG, Huang
摘要： This application provides a symbol processing method and apparatus. The method includes: obtaining, based on a plurality of complex-valued symbols, a first set corresponding to a first transmitted symbol and a second set corresponding to a second transmitted symbol; performing a copy operation on the first set and the second set, so that both the first set and the second set have first complex-valued symbols, and a start location of a first subset including the first complex-valued symbols in the first set is the same as a start location of a second subset including the first complex-valued symbols in the second set; and performing signal processing including a cyclic shift or frequency domain weighting on the first set and the second set, so that the start location and an end location of the first subset respectively correspond to locations preceding and following a first reference point of the first transmitted symbol, and the start location and an end location of the second subset respectively correspond to locations preceding and following a second reference point of the second transmitted symbol. In this application, a guard interval between symbols can be flexibly configured.
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公开(公告)号：EP3840505A1
公开(公告)日：2021-06-23
申请号：EP19866949.1
申请日：2019-08-28
发明人： LIU, Fengwei , CHEN, Lei , QIU, Jing
IPC分类号： H04W72/04
摘要： This application provides a measurement signal configuration method and an apparatus, and relates to the field of communications technologies, to optimize sending or measuring of an SSB in a relay system, so as to avoid a problem that overheads for sending the SSB are excessively high due to node discovery or measurement. This reduces overheads for sending or measuring the SSB by a relay node, and improves resource utilization. The method includes: sending, by a first node, a synchronization signal block SSB at a first candidate location of the SSB, where the synchronization signal block SSB is used by a second node to discover the first node or measure an SSB of the first node, and the first candidate location of the SSB includes a set of candidate locations of SSBs sent by the first node to implement coverage; receiving, by the first node, SSB optimization configuration information, where the SSB optimization configuration information includes an identifier or a number of the SSB; and determining, by the first node, a synchronization signal block SSB sending subset based on the SSB optimization configuration information.
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