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EP-4258579-B1 - WIRELESS COMMUNICATION METHOD, TERMINAL DEVICE AND NETWORK DEVICE

EP4258579B1EP 4258579 B1EP4258579 B1EP 4258579B1EP-4258579-B1

Inventors

  • SHI, ZHIHUA
  • CHEN, WENHONG
  • FANG, Yun
  • ZHANG, ZHI

Dates

Publication Date
20260506
Application Date
20181102

Claims (13)

  1. A wireless communication method, comprising: determining (S210), by a network device, a hybrid automatic repeat request, HARQ, process; and receiving and/or sending (S220), by the network device, a signal from/to a terminal device according to the HARQ process; characterized in that the method further comprises: generating, by the network device, configuration information, wherein the configuration information is used for the terminal device to determine a number of bits of a process number of the HARQ process; and sending, by the network device, the configuration information to the terminal device; wherein the configuration information comprises: a number of physical downlink control channels, PDCCH, that the terminal device needs to detect at a same time; or the configuration information comprises: the number of bits of the process number of the HARQ process.
  2. The method of claim 1, wherein the configuration information is used for the terminal device to determine whether a target domain exists and/or a number of bits corresponding to the target domain, and the target domain is used for the terminal device to determine an HARQ process group; wherein the configuration information comprises: a number of physical downlink control channels, PDCCH, that the terminal device needs to detect at a same time; or the configuration information comprises: the number of bits corresponding to the target field; or the configuration information comprises: a number of HARQ process groups.
  3. The method of claim 1 or 2, wherein sending, by the network device, the configuration information to the terminal device comprises: sending, by the network device, the configuration information to the terminal device through at least one of downlink control information, DCI, radio resource control, RRC, signaling, and media access control, MAC, Control Element, CE.
  4. The method of claim 1, wherein determining, by the network device, the hybrid automatic repeat request, HARQ, process comprises: determining, by the network device, an HARQ process group to which the HARQ process belongs; and determining, by network device, the HARQ process according to the HARQ process group and a process number of the HARQ process. wherein determining, by the network device, the HARQ process group to which the HARQ process belongs comprises: determining, by the network device, the HARQ process group according to a search space, SS, of the terminal device.
  5. The method of claim 4, wherein determining, by the network device, the HARQ process group according to the search space, SS, of the terminal device comprises: determining, by the network device, an HARQ process group corresponding to an SS group to which the SS belongs as the HARQ process group to which the HARQ process belongs; or, determining, by the network device, the HARQ process group according to the search space, SS, of the terminal device comprises: determining, by the network device, according to a control resource set, CORESET, corresponding to the SS, an HARQ process group corresponding to a CORESET group to which the CORESET belongs as the HARQ process group; or, determining, by the network device, the HARQ process group according to the search space, SS, of the terminal device comprises: determining, by the network device, an HARQ process group indicated in configuration information corresponding to the SS as the HARQ process group; or, determining, by the network device, the HARQ process group according to the search space, SS, of the terminal device comprises: determining, by the network device, an HARQ process group indicated in configuration information corresponding to a control resource set, CORESET, corresponding to the SS as the HARQ process group; wherein the configuration information is information configured based on a radio resource control, RRC, signaling and/or a media access control, MAC, Control Element, CE.
  6. The method of claim 1, wherein the method further comprises: generating, by the network device, indication information, wherein the indication information is used for indicating an HARQ process group to which the HARQ process belongs; and sending, by the network device, the indication information to the terminal device.
  7. A network device (400), comprising: a determination unit (410) configured to determine a hybrid automatic repeat request, HARQ, process; a communication unit (420) configured to receive and/or send a signal from/to a terminal device according to the HARQ process; characterized in that : the determination unit (410) is specifically configured to: generate configuration information, wherein the configuration information is used for the terminal device to determine a number of bits of a process number of the HARQ process; and the communication unit (420) is further configured to: send the configuration information to the terminal device; wherein the configuration information comprises: a number of physical downlink control channels, PDCCH, that the terminal device needs to detect at a same time; or the configuration information comprises: the number of bits of the process number of the HARQ process.
  8. The network device of claim 7, wherein the configuration information is used for the terminal device to determine whether a target domain exists and/or a number of bits corresponding to the target domain, and the target domain is used for the terminal device to determine an HARQ process group; wherein the configuration information comprises: a number of physical downlink control channels, PDCCH, that the terminal device needs to detect at a same time; or the configuration information comprises: the number of bits corresponding to the target field; or the configuration information comprises: a number of HARQ process groups.
  9. The network device of claim 7 or 8, wherein the communication unit (420) is specifically configured to: send the configuration information to the terminal device through at least one of downlink control information, DCI, radio resource control, RRC, signaling, and media access control, MAC, Control Element, CE.
  10. The network device of claim 7, wherein the determination unit (410) is specifically configured to: determine an HARQ process group to which the HARQ process belongs; and determine the HARQ process according to the HARQ process group and a process number of the HARQ process; wherein the determination unit is specifically configured to: determine the HARQ process group according to a search space, SS, of the terminal device.
  11. The network device of claim 10, wherein the determination unit (410) is specifically configured to: determine an HARQ process group corresponding to an SS group to which the SS belongs as the HARQ process group to which the HARQ process belongs; or, the determination unit (410) is specifically configured to: determine, according to a control resource set, CORESET, corresponding to the SS, an HARQ process group corresponding to a CORESET group to which the CORESET belongs as the HARQ process group; or, the determination unit (410) is specifically configured to: determine an HARQ process group indicated in configuration information corresponding to the SS as the HARQ process group; or, the determination unit (410) is specifically configured to: determine an HARQ process group indicated in configuration information corresponding to a control resource set, CORESET, corresponding to the SS as the HARQ process group; wherein the configuration information is information configured based on a radio resource control, RRC, signaling and/or a media access control, MAC, Control Element, CE.
  12. The network device of claim 7, wherein the determination unit (410) is specifically configured to: generate indication information, wherein the indication information is used for indicating an HARQ process group to which the HARQ process belongs; and send the indication information to the terminal device.
  13. The network device of any one of claims 7 to 12, wherein the signal comprises at least one physical uplink shared channel, PUSCH, and/or at least one physical downlink shared channel, PDSCH, wherein the signal comprises a signal sent to or received from the terminal device through at least one of at least one transmission reception point, TRP, at least one antenna panel, and at least one beam.

Description

Technical Field Embodiments of the present application relate to the field of communication, and more specifically, to a communication method and a network device. Background In current discussion about NR (New Radio)/5G, two approaches are supported for simultaneous UE (User Equipment) transmission through multiple Transmission Reception Points (TRP), multiple Antenna Panels or multiple beams. A first approach is that the UE only receives one NR-PDCCH, and this NR-PDCCH indicates related indication information of data transmitted on multiple TRPs/beams. A second approach is that the UE receives different NR-PDCCHs from different TRPs/beams, and each NR-PDCCH indicates related indication information about a corresponding data transmission. In the 15th release (Rel-15), both DCI (Downlink Control Information) of uplink scheduling and DCI of downlink scheduling contain HARQ process information corresponding to scheduled data (PUSCH or PDSCH). For the second approach, if the existing 16 processes are used, 16 processes need to be shared by transmissions corresponding to different TRPs, which may quite possibly cause unnecessary stop-and-wait, thus affecting the data transmission rate. In addition, if a same HARQ process number is used by two TRP transmissions, an ambiguity problem will be caused. The document CN108631958A discloses a method and device for determining a HARQ process. The document HUAWEI ET AL: "DL multi-TRP/panel operation in R15", 3GPP DRAFT; R1-1802073, discloses multi-TRP/panel transmissions in the case of multiple NR-PDCCH reception and multi-TRP/panel transmissions with single-PDCCH. Summary A wireless communication method and a network device according to the independent claims are provided. Further improvements and embodiments are provided in the dependent claims. With the embodiments provided in the present disclosure, when the terminal device performs transmission through multiple TRPs, HARQ processes applicable to the multiple TRPs can be effectively distinguished, thereby avoiding ambiguity of HARQ processes and improving system performance. Brief Description of Drawings FIG. 1 is an example of an application scenario according to an embodiment of the present application.FIG. 2 is an example of an application scenario according to an embodiment of the present application.FIG. 3 is a schematic flow chart of a communication method according to an embodiment of the present application.FIG. 4 is a schematic block diagram of a terminal device according to an embodiment of the present application.FIG. 5 is a schematic block diagram of a network device according to an embodiment of the present application.FIG. 6 is a schematic block diagram of a communication device according to an embodiment of the present application.FIG. 7 is a schematic diagram of a chip according to an embodiment of the present application. Detailed Description The technical solutions in the embodiments of the present application are described below with reference to the accompanying drawings. FIG. 1 is an example diagram of a 5G communication system 100 according to an embodiment of the present application. As shown in FIG. 1, the communication system 100 may include a terminal device 110, a first TRP 121 and a second TRP 122. The first TRP 121 and the second TRP 122 may communicate with the terminal device 110 respectively through air interfaces. Specifically, each of the first TRP 121 and the second TRP 122 may schedule a data transmission to the terminal device 110, respectively. Specifically, the terminal device 110 detects PDCCH(s) from the first TRP 121 and/or the second TRP 122 for scheduling multiple uplink data transmissions (or multiple downlink data transmissions). Optionally, the PDCCH(s) of the first TRP 121 and the PDCCH of the second TRP 122 may be the same PDCCH or different PDCCHs, which is not specifically limited in embodiments of the present application. It should be understood that, in the communication system shown in FIG. 1, there may be multiple communication scenarios. This is not specifically restricted in embodiments of the present application. For example, the first TRP 121 and the second TRP 122 belong to the same cell, and a connection (backhaul) between the first TRP 121 and the second TRP 122 is ideal, that is, information interaction may be performed rapidly and dynamically. For another example, the first TRP 121 and the second TRP 122 belong to the same cell, and the connection between the first TRP 121 and the second TRP 122 is non-ideal, that is, information interaction between the first TRP 121 and the second TRP 122 cannot be performed quickly, and only relatively slow data interaction can be performed. For another example, the first TRP 121 and the second TRP 122 belong to different cells, and the connection between the first TRP 121 and the second TRP 122 is ideal. For still another example, the first TRP 121 and the second TRP 122 belong to different cells, and the connection b