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EP-3637873-B1 - WIRELESS COMMUNICATION METHOD AND DEVICE

EP3637873B1EP 3637873 B1EP3637873 B1EP 3637873B1EP-3637873-B1

Inventors

  • CHEN, WENHONG

Dates

Publication Date
20260506
Application Date
20170527

Claims (8)

  1. A wireless communication method, comprising: determining (210), by a terminal device, a same target path loss value for SRS resources in a SRS resource set according to a first downlink signal corresponding to the SRS resource set; wherein the same target path loss value is determined for the SRS resource set and the determined same target path loss value is used as a path loss value corresponding to all SRS resources in the SRS resource set; determining (220), by the terminal device, a target transmission power for a SRS resource in the SRS resource set according to the same target path loss value; and transmitting (230), by the terminal device, an SRS to a network device on the SRS resource in the SRS resource set according to the target transmission power; wherein the method further comprises: receiving, by the terminal device, first indication information that is sent by the network device, wherein the first indication information is used to indicate the first downlink signal, and wherein the first downlink signal is a CSI-RS or a synchronization signal block; wherein receiving, by the terminal device, first indication information that is sent by the network device comprises: receiving, by the terminal, indication of a time index of the synchronization signal block for the target path loss determination from the network device, so that the terminal device determines the target path loss based on the synchronization signal in the synchronization signal block corresponding to the index or the DMRS of the PBCH in the synchronization signal block.
  2. The method according to claim 1, wherein the determining (220), by the terminal device, the target transmission power for the SRS resource in the SRS resource set comprises: determining a same target transmission power for the SRS resources in the SRS resource set.
  3. The method according to claim 2, wherein the transmitting (230), by the terminal device, an SRS to the network device on the SRS resource in the SRS resource set according to the target transmission power comprises: transmitting (230) the SRS to the network device on the SRS resource in the SRS resource set according to the same target transmission power.
  4. The method according to claim 3, wherein the transmitting (230) the SRS to the network device on the SRS resource in the SRS resource set according to the same target transmission power comprises: transmitting the SRS to the network device using different transmission beams on different SRS resources in the SRS resource set respectively according to the same target transmission power.
  5. The method according to claim 1 or 2, wherein before determining (210), by the terminal device, the same target path loss value for SRS resources in the SRS resource set according to the first downlink signal corresponding to the SRS resource set, the method further comprises: determining the same first downlink signal corresponding to the SRS resource set according to a first preset relationship.
  6. The method according to any one of claims 1 to 5, wherein the determining (210), by the terminal device, the same target path loss value for the SRS resources in the SRS resource set according to the first downlink signal corresponding to the SRS resource set comprises: determining a path loss value used for calculating a transmission power of a first uplink signal as the same target path loss value.
  7. The method according to any one of claims 1 to 5, wherein the determining (210), by the terminal device, the same target path loss value for the SRS resources in the SRS resource set according to the first downlink signal corresponding to the SRS resource set comprises: obtaining a second path loss value according to a receiving power of the first downlink signal and a transmission power of the first downlink signal; and determining the second path loss value as the same target path loss value.
  8. A terminal device (300), comprising: a processing unit (310) and a communication unit (320); wherein the processing unit (310) is configured to perform the wireless communication method according to any one of claims 1-7, via the communication unit (320).

Description

TECHNICAL FIELD The present application relates to the field of communications and, more particularly, to a wireless communication method and device. BACKGROUND In the New Radio (NR) system, uplink beam management, including transmitting beam management and receiving beam management, may be performed based on a Sounding Reference Signal (SRS). For the transmitting beam management, the terminal device may send the SRS by using different beams on a plurality of SRS resources, and the network side selects at least one SRS resource based on strengths of the received signals on the plurality of SRS resources and indicate it to the terminal, so that the terminal uses a beam corresponding to this SRS resource for transmitting data. For the receiving beam management, the terminal transmits the SRS by using the same beam on one or more SRS resources, and the network side receives the SRS signals on the plurality of SRS resources based on different receiving beams, and selects a receiving beam for receiving data according to strengths of the received signals. The selection of the transmission power of the SRS signal has an important influence on the selection of the receiving beam and the transmitting beam in beam management. Therefore, how to control the power of the SRS signal is an urgent problem to be solved. CATT: "SRS Power Control in Multi-Beam Configuration", 3GPP DRAFT; R1-1707531 discloses SRS power control in multi-beam configuration. ZTE ET AL: "Discussion on UL power control for NR". 3GPP DRAFT; R1-1704418 discusses UL power control for NR. OPPO XINWEI XIAOMI COOLPAD DOCOMO ERICSSON HUAWEI HISILICON: "WF on aperiodic SRS for UL beam management", 3GPP DRAFT; R1-1709554 discloses WF on aperiodic SRS for UL beam management. HUAWEI ET AL: "UL beam management", 3GPP DRAFT; R1-1706925 discloses UL beam management. CN102958147A provides a method, user equipment and a base station for controlling uplink power. US2013/039199A1 propose procedures for point association as well as measurement and feedback required to enable point association for CoMP deployment scenario 4. SUMMARY The invention is defined by the independent claims. The embodiments of the present application provide a wireless communication method and device, which can perform reasonable power control on the SRS. In a first aspect, there is provided a wireless communication method according to claim 1. According to a second aspect, there is provided a terminal device, including a processor, a memory and a transceiver, so that the terminal device performs the method in the above first aspect Therefore, in the embodiments of the present application, the terminal device determines the target path loss value for the SRS resource in the SRS resource set according to the same first downlink signal corresponding to the SRS resource set; and determines the target transmission power for the SRS resource in the SRS resource set according to the target path loss value, so that a reasonable transmission power can be selected for the SRS transmission. BRIEF DESCRIPTION OF THE DRAWINGS In order to illustrate the technical solutions of the embodiments of the present application more clearly, the drawings used in the description of the embodiments or the related art will be briefly described below. Obviously, the drawings in the following description merely involve some embodiments of the present application. For those of ordinary skills in the art, other drawings may also be obtained based on these drawings without going through any creative effort. Fig. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application.Fig. 2 is a schematic flowchart of a wireless communication method according to an embodiment of the present application.Fig. 3 is a schematic block diagram of a terminal device according to an embodiment of the present application.Fig. 4 is a schematic block diagram of a system chipFig. 5 is a schematic block diagram of a communication device DETAILED DESCRIPTION The following clearly and completely describes the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are merely some but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skills in the art without going through any creative effort shall fall within the scope of protection of the present application. The technical solutions of the embodiments of the present application may be applied to various communication systems, for example, a Global System of Mobile communication ("GSM") system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service ("GPRS"), a Long Term Evolution ("LTE") system, a LTE Frequency Division Duplex