Power control method and control device

Abstract

This application provides a power control method and control device. This application determines the first transmission power of the terminal device when transmitting SL-PRS through the first resource by acquiring at least one of the following: power control parameters of SL-PRS, the maximum transmission power of the terminal device, the number of RBs occupied by the first resource for SL-PRS transmission, DL path loss reference signal configuration information, and SL reference signal received power. It also determines the second transmission power of the terminal device when transmitting PSCCH through the second resource by acquiring at least one of the following: power control parameters of PSCCH, the maximum transmission power of the terminal device, the number of RBs occupied by the second resource for PSCCH transmission, DL path loss reference signal configuration information, and SL reference signal received power. This application implements power control of SL-PRS and PSCCH in SL positioning technology.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a power control method and control device. Background Technology

[0002] Sidelink (SL) positioning, as a type of wireless positioning technology in cellular-vehicle toeverything (C-V2X), has been the subject of related technology research and standard development in Release 18 of the 3rd Generation Partnership Project (3GPP).

[0003] SL positioning can be used to achieve mutual measurement and positioning between terminal devices (such as vehicles) in autonomous driving scenarios. For example, after a first terminal device sends a signal to a second terminal device, the second terminal device can determine the relative positional relationship between the two by detecting the signal sent by the first terminal device.

[0004] To ensure that the second terminal device can detect the signal sent by the first terminal device, the transmission power of that signal needs to be controlled. However, SL positioning technology does not provide a solution for controlling the transmission power of the signal. Summary of the Invention

[0005] This application provides a power control method and control device to provide a power control scheme for the transmission of SL-PRS and PSCCH in SL positioning technology.

[0006] In a first aspect, this application provides a power control method applied to a terminal device. The method includes: acquiring first information, the first information including one or more of the following: power control parameters of a sidelink positioning reference signal (SL-PRS), the maximum transmit power of the terminal device, the number of resource blocks (RBs) occupied by a first resource for transmitting SL-PRS, downlink path loss reference signal (DL) configuration information, and SL reference signal receive power; determining a first transmit power of the terminal device when transmitting SL-PRS through the first resource based on the first information; acquiring second information, the second information including one or more of the following: power control parameters of a physical sidelink control channel (PSCCH), the maximum transmit power of the terminal device, the number of RBs occupied by a second resource for PSCCH transmission, DL path loss reference signal configuration information, and SL reference signal receive power, wherein the first resource and the second resource belong to the same resource pool; and determining a second transmit power of the terminal device when transmitting PSCCH through the second resource based on the second information.

[0007] The method can be executed by the first terminal device or by a component of the first terminal device (such as a processor, chip, or chip system).

[0008] Optionally, the power control parameters of the sidelink positioning reference signal (SL-PRS) and the power control parameters of the physical sidelink control channel (PSCCH) can be configured by network equipment (such as base stations), and this application does not limit the specific configuration process.

[0009] For example, after the base station configures the SL-PRS power control parameters and PSCCH power control parameters for the first terminal device, it can transmit them to the first terminal device through radio resource control (RRC) messages.

[0010] The power control parameters of the SL-PRS may include at least one of the following: sl-MaxTxPower-SLPRS, a parameter indicating the transmit power of the SL-PRS determined based on the network congestion ratio (CBR) and transmission priority of the first resource in the resource pool; dl-P0-SLPRS, a parameter indicating the first receive power of the SL-PRS expected to be received by the receiving device based on DL power control; dl-Alpha-SLPRS, a parameter indicating the first compensation factor of the first DL path loss based on DL power control; sl-P0-SLPRS, a parameter indicating the second receive power of the SL-PRS expected to be received by the receiving device based on SL power control; and sl-Alpha-SLPRS, a parameter indicating the second compensation factor of the first SL path loss based on SL power control.

[0011] The power control parameters of the PSCCH include at least one of the following: parameter sl-MaxTxPower-RS for indicating the transmit power of the PSCCH determined based on the CBR and transmission priority of the second resource in the resource pool; parameter dl-P0-RS for indicating the third receive power of the PSCCH expected to be received by the receiving device based on DL power control; parameter dl-Alpha-RS for indicating the third compensation factor of the second DL path loss based on DL power control; parameter sl-P0-RS for indicating the fourth receive power of the PSCCH expected to be received by the receiving device based on SL power control; and parameter sl-Alpha-RS for indicating the fourth compensation factor of the second SL path loss based on SL power control.

[0012] The maximum transmission power of a terminal device is determined by the performance of the terminal device itself. This power can be configured in network equipment (such as base stations) or in the terminal device itself.

[0013] Optionally, if the power is configured in a network device (such as a base station), the base station can send the information to the first terminal device; if the power is configured in a terminal device, the terminal device can access the information.

[0014] The first resource refers to the physical resources in the SL positioning resource pool used for transmitting SL-PRS, and the second resource refers to the physical resources in the SL positioning resource pool used for transmitting PSCCH. The first resource and the second resource belong to the same resource pool.

[0015] Optionally, the first resource and the second resource can be physical resources occupied by the same terminal device, and the first resource and the second resource belong to the same resource pool.

[0016] As an example, the first resource can be the physical resources occupied by the first terminal device when transmitting SL-PRS, and the second resource can be the physical resources occupied by the first terminal device when transmitting PSCCH. The first resource and the second resource can both belong to the SL positioning resource pool.

[0017] In one possible implementation, the SL positioning resource pool and the physical layer structure within the resource pool can be pre-configured, and the relevant configuration information can be pre-stored in network devices or terminal devices.

[0018] Optionally, if the configuration information is stored in a network device (such as a base station), the base station can send the number of resource blocks (RBs) occupied by the first resource for transmitting SL-PRS and the number of RBs occupied by the second resource for transmitting PSCCH to the terminal device; if the configuration information is stored in the terminal device, the terminal device can invoke the configuration information.

[0019] Optionally, the downlink (DL) path loss reference signal configuration information can be configured by network devices (such as base stations), and this application does not specifically limit this.

[0020] For example, the configuration information of DL path loss configured by the base station for the first terminal device can be information from the path loss reference signal parameter package.

[0021] For example, the path loss reference signal parameter package may contain cell indices of one or more network devices. The first terminal device can measure and select the DL path loss reference signal based on the index, and can further determine the DL path loss. The DL path loss reference signal can be a downlink positioning reference signal (DL-PRS) or a synchronization signal / physical broadcast channel block (SS (synchronization signal) / PBCH Block, SSB), and this application does not impose any restrictions on this.

[0022] Optionally, the SL reference signal received power can be obtained from the receiving device. For example, after receiving the sidelink control information (SCI) transmitted by the first terminal device via PSCCH, the receiving device measures the SL reference signal received power (RSRP) based on the demodulation reference signal (DMRS) in the SCI signal and feeds it back to the first terminal device. Accordingly, the first terminal device receives the SL reference signal received power.

[0023] In this technical solution, by configuring an independent set of power control parameters for SL-PRS and PSCCH respectively, the first terminal device can determine the transmission power of SL-PRS and PSCCH based on the configured power control parameters, thereby realizing power control in SL positioning technology.

[0024] In conjunction with the first aspect, in one possible implementation, the first transmission power is the minimum value in a first power set, which includes at least one of the following powers: the maximum transmission power of the terminal device, the transmission power of the SL-PRS determined based on the network congestion rate and transmission priority of the first resource in the resource pool, a third transmission power, and a fourth transmission power. The third transmission power is related to the first received power of the SL-PRS expected to be received by the receiving device, the number of first RBs, the first DL path loss, and a first compensation factor for the first DL path loss. The fourth transmission power is related to the second received power of the SL-PRS expected to be received by the receiving device, the number of first RBs, the first SL path loss, and a second compensation factor for the first SL path loss. The number of first RBs is the number of RBs occupied by the first resource.

[0025] In this implementation, the transmission power of the SL-PRS, determined based on the network congestion rate and transmission priority of the first resource in the resource pool, can be indicated by the SL-PRS power control parameter sl-MaxTxPower-SLPRS. If this parameter is not configured, the transmission power of the SL-PRS, determined based on the network congestion rate and transmission priority of the first resource in the resource pool, can be equal to the maximum transmission power of the first terminal device.

[0026] Optionally, the first received power can be indicated by the SL-PRS power control parameter dl-P0-SLPRS. If this parameter is not configured, the first received power can be the minimum value between the maximum transmit power of the first terminal device and the transmit power of the SL-PRS determined based on the network congestion rate CBR and priority of the first resource in the resource pool. The second received power can be indicated by the SL-PRS power control parameter sl-P0-SLPRS. If this parameter is not configured, the second received power can be the minimum value between the maximum transmit power of the first terminal device and the transmit power of the SL-PRS determined based on the network congestion rate CBR and priority of the first resource in the resource pool.

[0027] Optionally, the first DL path loss is the DL path loss determined by the first terminal device based on the DL path loss reference signal configuration information configured by the network device (such as the base station) for SL-PRS. The first compensation factor can be indicated by the power control parameter dl-Alpha-SLPRS of SL-PRS. If this parameter is not configured, the first compensation factor can be 1.

[0028] Optionally, the first SL path loss is the SL path loss determined by the first terminal device based on the L3 RSRP generated by the L1 RSRP fed back by the second terminal device. The first SL path loss is the difference between the reference transmission power of the SL-PRS and the L3 RSRP. The second compensation factor can be indicated by the power control parameter sl-Alpha-SLPRS of the SL-PRS. If this parameter is not configured, the second compensation factor can be 1.

[0029] In conjunction with the first aspect, in one possible implementation, the second transmission power is the minimum value in a second power set, which includes at least one of the following powers: the maximum transmission power of the terminal device, the transmission power of the PSCCH determined based on the network congestion rate and transmission priority of the second resource in the resource pool, a fifth transmission power, and a sixth transmission power. The fifth transmission power is related to the third reception power of the PSCCH expected to be received by the receiving device, the number of second RBs, the second DL path loss, and a third compensation factor for the second DL path loss. The sixth transmission power is related to the fourth reception power of the PSCCH expected to be received by the receiving device, the number of second RBs, the second SL path loss, and a fourth compensation factor for the second SL path loss. The number of second RBs is the number of RBs occupied by the second resource.

[0030] In this implementation, the transmission power of the PSCCH, determined based on the network congestion rate (CBR) and transmission priority of the second resource in the resource pool, can be indicated by the PSCCH power control parameter sl-MaxTxPower-RS. If this parameter is not configured, the transmission power of the PSCCH, determined based on the network congestion rate (CBR) and transmission priority of the second resource in the resource pool, can be equal to the maximum transmission power of the first terminal device.

[0031] Optionally, the third receive power can be indicated by the power control parameter dl-P0-RS of the PSCCH. If this parameter is not configured, the third receive power can be the minimum value between the maximum transmit power of the first terminal device and the transmit power determined based on the network congestion rate CBR and priority of the second resource in the resource pool. The fourth receive power can be indicated by the power control parameter sl-P0-RS of the PSCCH. If this parameter is not configured, the fourth receive power can be the minimum value between the maximum transmit power of the first terminal device and the transmit power of the PSCCH determined based on the network congestion rate CBR and priority of the second resource in the resource pool.

[0032] Optionally, the second DL path loss is the DL path loss determined by the first terminal device based on the DL path loss reference signal configuration information configured by the network device (such as the base station) for the PSCCH; the third compensation factor can be indicated by the power control parameter dl-Alpha-RS of the PSCCH. If this parameter is not configured, the first compensation factor can be 1.

[0033] Optionally, the second SL path loss is the SL path loss determined by the first terminal device based on the L3 RSRP generated by the L1 RSRP fed back by the second terminal device. The second SL path loss is the difference between the reference transmission power of the PSCCH and the L3 RSRP. The fourth compensation factor can be indicated by the power control parameter sl-Alpha-RS of the PSCCH. If this parameter is not configured, the fourth compensation factor can be 1.

[0034] In conjunction with the first aspect, in one possible implementation, the first received power is the same as the third received power, and the first compensation factor is the same as the third compensation factor; and / or, the second received power is the same as the fourth received power, and the second compensation factor is the same as the fourth compensation factor.

[0035] This implementation allows SL-PRS and PSCCH to have the same RB-level power.

[0036] The fact that SL-PRS and PSCCH have the same RB-level power can be understood as SL-PRS and PSCCH having the same transmission power on one symbol within the same RB. This can also be understood as SL-PRS and PSCCH having the same RB-level power, or the same power spectral density (PSD). The symbol refers to an orthogonal frequency division multiplexing (OFDM) symbol.

[0037] In this implementation, SL-PRS and PSCCH have the same RB-level power, ensuring that the power control schemes for SL technologies (such as SL positioning and SL communication) all use the same PSD power control scheme, guaranteeing consistency in power control implementation across SL technologies. Furthermore, during SL positioning and SL communication, the second terminal device needs to demodulate the received signal after receiving it from the first terminal device, and this demodulation process must be implemented in the RB. Therefore, this implementation also allows the terminal device to use the same signal demodulation scheme as existing SL communication during SL positioning, eliminating the need to reconfigure the signal demodulation scheme for SL positioning, simplifying the implementation of the SL positioning power control scheme, and saving resources.

[0038] In conjunction with the first aspect, in one possible implementation, the third received power is related to the first received power and the transmission comb value of the SL-PRS, and the first compensation factor and the third compensation factor are the same; and / or, the fourth received power is related to the second received power and the transmission comb value of the SL-PRS, and the second compensation factor and the fourth compensation factor are the same.

[0039] This implementation allows SL-PRS and PSCCH to have the same resource element (RE) level power.

[0040] The fact that SL-PRS and PSCCH have the same RE level power can be understood as the same transmission power of the REs used to transmit SL-PRS and PSCCH. This can also be interpreted as SL-PRS and PSCCH having the same RE level power, or having the same energy per resource element (EPRE).

[0041] In this implementation, SL-PRS and PSCCH have the same EPRE, which allows the second terminal device to use the same resource detection method as existing SL communication when detecting information sent by the first terminal device to achieve SL positioning. This simplifies the implementation process of the power control scheme for SL positioning and saves resources.

[0042] In conjunction with the first aspect, in one possible implementation, the third received power satisfies the following relationship with the first received power and the transmission comb value of SL-PRS:

[0043]

[0044] in, The first received power is denoted by , and Comb is the transmission comb value of SL-PRS. The third received power.

[0045] In conjunction with the first aspect, in one possible implementation, the fourth received power, the second received power, and the transmission comb value of the SL-PRS satisfy the following relationship:

[0046]

[0047] in, The second received power is denoted by , and Comb is the transmission comb value of SL-PRS. This refers to the fourth received power.

[0048] In conjunction with the first aspect, in one possible implementation, the third received power is related to the first received power, the number of the first RBs, the number of the second RBs, and the transmission comb value of the SL-PRS, and the first compensation factor and the third compensation factor are the same; and / or, the fourth received power is related to the second received power, the number of the first RBs, the number of the second RBs, and the transmission comb value of the SL-PRS, and the second compensation factor and the fourth compensation factor are the same.

[0049] This implementation allows SL-PRS and PSCCH to have the same symbol-level power.

[0050] The fact that SL-PRS and PSCCH have the same symbol-level power can be understood as SL-PRS and PSCCH having the same transmission power on one symbol within a bandwidth part (BWP).

[0051] In this implementation, SL-PRS and PSCCH have the same symbol-level power, which means that the terminal device does not need additional power conversion time when transmitting SL-PRS and PSCCH, thus reducing the difficulty of implementing the power control scheme for SL positioning.

[0052] In conjunction with the first aspect, in one possible implementation, the third received power satisfies the following relationship with the first received power, the number of the first RBs, the number of the second RBs, and the transmission comb value of the SL-PRS:

[0053]

[0054] in, The first received power is denoted by , and Comb is the transmission comb value of SL-PRS. The number of the first RB, The number of the second RB, The third received power.

[0055] In conjunction with the first aspect, in one possible implementation, the fourth received power satisfies the following relationship with the second received power, the number of the first RBs, the number of the second RBs, and the transmission comb value of the SL-PRS:

[0056]

[0057] in, The second received power is denoted by , and Comb is the transmission comb value of SL-PRS. The number of the first RB, The number of the second RB, This refers to the fourth received power.

[0058] In conjunction with the first aspect, in one possible implementation, the third transmit power satisfies the following relationship with the first receive power, the number of the first RBs, the first DL path loss, and the first compensation factor:

[0059]

[0060] in, The third transmission power, Let μ be the first received power, and μ be a constant coefficient. The number of the first RB, PL is the first compensation factor. D1 This is the path loss of the first DL.

[0061] In conjunction with the first aspect, in one possible implementation, the fourth transmit power satisfies the following relationship with the second receive power, the number of the first RBs, the first SL path loss, and the second compensation factor:

[0062]

[0063] in, For the fourth transmission power, The second received power is given by μ, which is a constant coefficient. The number of the first RB, PL is the second compensation factor. SL1 This is the first SL path loss.

[0064] In conjunction with the first aspect, in one possible implementation, the fifth transmit power satisfies the following relationship with the third receive power, the number of the second RBs, the second DL path loss, and the third compensation factor:

[0065]

[0066] in, For the fifth transmission power, The third received power is μ, which is a constant coefficient. The number of the second RB, For the third compensation factor, PL D2 This is the path loss of the second DL.

[0067] In conjunction with the first aspect, in one possible implementation, the sixth transmit power, the fourth receive power, the number of the second RBs, the second SL path loss, and the fourth compensation factor satisfy the following relationship:

[0068]

[0069] in, For the sixth transmission power, The fourth received power is given, where μ is a constant coefficient. The number of the second RB, This is the fourth compensation factor. This is the second SL path loss.

[0070] Secondly, this application provides a power control method applied to a base station device. The method includes: transmitting first information, the first information including one or more of the following: power control parameters of a sidelink positioning reference signal (SL-PRS), power control parameters of a physical sidelink control channel (PSCCH), the maximum transmit power of a terminal device, the number of resource blocks (RBs) occupied by a first resource for transmitting SL-PRS, the number of RBs occupied by a second resource for transmitting PSCCH, and downlink path loss reference signal configuration information, wherein the first resource and the second resource belong to the same resource pool.

[0071] This method can be executed by base station equipment or by components of the base station equipment (such as processors, chips, or chip systems).

[0072] Optionally, the first resource and the second resource can be physical resources occupied by the same terminal device, and the first resource and the second resource belong to the same resource pool.

[0073] As an example, the first resource can be the physical resources occupied by the first terminal device when transmitting SL-PRS, and the second resource can be the physical resources occupied by the first terminal device when transmitting PSCCH. The first resource and the second resource can both belong to the SL positioning resource pool.

[0074] Thirdly, this application provides a power control device comprising modules for implementing the method in the first aspect or any of the implementations thereof, each module being implemented in hardware and / or software.

[0075] For example, the device may include a processing module and a transceiver module. The transceiver module is used to acquire first information, which includes one or more of the following: power control parameters of the sidelink positioning reference signal SL-PRS, the maximum transmit power of the terminal device, the number of resource blocks (RBs) occupied by the first resource for transmitting SL-PRS, downlink path loss reference signal configuration information, and SL reference signal receive power; the processing module is used to determine the first transmit power of the terminal device when transmitting SL-PRS through the first resource based on the first information; the transceiver module is also used to acquire second information, which includes one or more of the following: power control parameters of the physical sidelink control channel PSCCH, the maximum transmit power of the terminal device, the number of RBs occupied by the second resource for PSCCH transmission, DL path loss reference signal configuration information, and SL reference signal receive power, wherein the first resource and the second resource belong to the same resource pool; the processing module is also used to determine the second transmit power of the terminal device when transmitting PSCCH through the second resource based on the second information.

[0076] Optionally, the device may be a first terminal device or a chip applied in the first terminal device.

[0077] Fourthly, this application provides a power control device comprising modules for implementing the methods of the second aspect or any of the implementations thereof, each module being implemented in hardware and / or software.

[0078] For example, the device may include a transceiver module. The transceiver module is used to transmit first information, which includes one or more of the following: power control parameters of the sidelink positioning reference signal SL-PRS, power control parameters of the physical sidelink control channel PSCCH, the maximum transmit power of the terminal device, the number of resource blocks (RBs) occupied by the first resource for transmitting SL-PRS, the number of RBs occupied by the second resource for PSCCH transmission, and reference signal configuration information for downlink path loss (DL), wherein the first resource and the second resource belong to the same resource pool.

[0079] Optionally, the device may be a base station device or a chip used in a base station device.

[0080] Fifthly, this application provides a power control device including a processor coupled to a memory, which can be used to execute instructions in the memory to implement the method in the first aspect or any of its possible implementations. Optionally, the device further includes a memory. Optionally, the device further includes a communication interface, to which the processor is coupled.

[0081] Sixthly, this application provides a power control device including a processor coupled to a memory, which can be used to execute instructions in the memory to implement the method in the second aspect or any of its possible implementations. Optionally, the device further includes a memory. Optionally, the device further includes a communication interface, to which the processor is coupled.

[0082] In a seventh aspect, this application provides a communication system that includes the means of the third or fifth aspect, as well as the means of the fourth or sixth aspect.

[0083] Eighthly, this application provides a computer-readable medium storing program code for execution by a device, the program code including methods for performing the methods described in the first aspect, the second aspect, or any possible implementation thereof.

[0084] Ninthly, this application provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the method as described in the first aspect, the second aspect, or any possible implementation thereof. Attached Figure Description

[0085] Figure 1 This is a schematic diagram illustrating a wireless network coverage scenario provided in one embodiment of this application;

[0086] Figure 2 A schematic diagram of the physical layer structure of an SL positioning resource pool provided in one embodiment of this application;

[0087] Figure 3 A schematic diagram of a power control method provided in one embodiment of this application;

[0088] Figure 4 This is a schematic diagram of the structure of a power control device provided in one embodiment of this application;

[0089] Figure 5 This is a schematic diagram of a power control device provided in another embodiment of this application.

[0090] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0091] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0092] Cellular-vehicle to everything (C-V2X) is currently a leading candidate technology for global vehicle-to-everything (V2X) deployment, supporting both cellular communication and sidelink (SL) communication. Considering that SL communication is not limited by cellular network and GPS coverage, its combination with positioning technology can support multi-scenario positioning for V2X, meeting the V2X requirements for low latency, high reliability, and high accuracy. Therefore, at the 3rd Generation Partnership Project (3GPP) radio access network (RAN) meeting, it was decided to conduct related technical research and standardization for SL positioning technology in release 18.

[0093] From the perspective of connected vehicle application scenarios, the business applications supported by SL positioning technology mainly include autonomous driving, traffic safety, and information services. Meanwhile, vehicles, as moving entities, will experience different application scenarios, including highways, urban roads, closed parks, and underground parking garages. Therefore, in addition to connected vehicle application scenarios, positioning scenarios related to wireless network coverage also need to be considered.

[0094] Figure 1 A schematic diagram is shown illustrating a wireless network coverage scenario to which an embodiment of this application can be applied. For example... Figure 1 As shown, this wireless network coverage scenario includes wireless network devices and user equipment (UE) devices. The wireless network devices include, for example, wireless network devices... Figure 1 The base station and terminal equipment in the middle are, for example, Figure 1 The first terminal device (UE1) and the second terminal device (UE2) in the system.

[0095] The base station can include various forms such as macro base stations, micro base stations, relay stations, and access points. For example, the base station involved in the embodiments of this application can be a base station in a new radio (NR) system. In 5th generation mobile networks (5G), the base station can also be called a transmission reception point (TRP) or a next-generation node B (gNB). It can also be a base transceiver station (BTS) in a global system for mobile communication (GSM) or code division multiple access (CDMA) system, a node B (NB) in a wideband code division multiple access (WCDMA) system, or an evolved node B (eNB or eNodeB) in a long term evolution (LTE) system.

[0096] The UE can include handheld devices, in-vehicle devices, wearable devices, or computing devices with wireless communication capabilities. For example, the UE can be a mobile phone, tablet computer, or computer with wireless transceiver capabilities. The UE can also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in autonomous driving, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in a smart city, a wireless terminal in a smart home, etc.

[0097] like Figure 1 As shown, taking two UEs participating in SL positioning as an example, Figure 1 (a) in the wireless network coverage scenario refers to the scenario where both UEs are within the network coverage area of ​​the base station. Figure 1 (b) in the text represents a partial coverage scenario in the wireless network coverage scenario. A partial coverage scenario means that one UE (e.g., UE1) is within the network coverage area of ​​the base station, while another UE (e.g., UE2) is outside the network coverage area of ​​the base station. Figure 1In the above, (c) represents the out-of-coverage scenario within the wireless network coverage scenario. The out-of-coverage scenario refers to a situation where both UEs are outside the network coverage area of ​​the base station. Figure 1 The circles in the diagram are used to schematically represent the network coverage area of ​​a base station.

[0098] Optionally, the UE can switch between in-coverage scenarios, partial-coverage scenarios, and out-of-coverage scenarios.

[0099] In this embodiment of the application, the number of UEs may be limited to two.

[0100] In this embodiment, Figure 1 In the wireless network coverage scenario shown, if the UE is within the coverage area of ​​the base station, the UE can receive data sent by the base station through the downlink (DL) or send data to the base station through the uplink (UL).

[0101] Optionally, the base station and the UE can communicate via the Uu interface.

[0102] It should be noted that, in the embodiments of this application, UE1 can optionally be a service transmitting device or a service receiving device, and UE2 can optionally be a service transmitting device or a service receiving device.

[0103] For ease of description and understanding, this application embodiment uses UE1 as a service transmitting device and UE2 as a service receiving device as an example for illustration.

[0104] For example, in Figure 1 In the wireless network coverage scenario shown, UE1 can send sidelink control information (SCI) to UE2 via the physical sidelink control channel (PSCCH). The SCI contains various transmission parameters, such as the time-frequency domain resource location of the transmitted SL-PRS, modulation and coding schemes (e.g., demodulation reference signal, DMRS), etc. Correspondingly, UE2 can receive the SCI signal sent by UE1, and can measure the reference signal received power (RSRP) based on the DMRS in the SCI signal, and feed back the measured RSRP to UE1.

[0105] UE1 can also send a sidelink positioning reference signal (SL-PRS) to UE2. UE2 receives the SL-PRS sent by UE1 and determines the relative distance and angle between the two, thus achieving relative positioning. If the location information (such as coordinates) of one of the devices in UE1 or UE2 is known, absolute positioning can be achieved.

[0106] In this application, the specific implementation method of SL positioning is not limited.

[0107] Optionally, UEs can communicate with each other via the PC5 interface.

[0108] In the process of implementing SL positioning, in order to ensure that UE2 can receive the signal sent by UE1 and minimize signal interference to other UEs, it is necessary to control the power of the signal sent by UE1.

[0109] In view of this, this application provides a power control method and control device for use in SL positioning technology, thereby enabling control of the transmission power of SL-PRS and PSCCH during SL positioning.

[0110] Before describing the power control scheme for SL positioning, relevant knowledge of SL positioning will be explained first to facilitate understanding of the technical solution of this application. It should be understood that this explanation is not intended to limit the embodiments of this application.

[0111] Figure 2 This is a schematic diagram of the physical layer structure of an SL positioning resource pool according to one embodiment of this application. Figure 2 As shown, this resource pool is dedicated to transmitting SL-PRS and PSCCH in SL positioning. The resource used for transmitting SL-PRS can be referred to as the first resource, and the resource used for transmitting PSCCH can be referred to as the second resource. The first resource and the second resource belong to the same resource pool.

[0112] Optionally, the physical layer structure can be the physical layer structure of the first terminal device in the bandwidth part (BWP) of SL.

[0113] Here, BWP refers to a set of multiple consecutive resource blocks (RBs) within a portion of the bandwidth of a carrier. For example, Figure 2 In this context, BWP b can be understood as the b-th BWP in carrier f, and BWP b includes multiple RBs.

[0114] In this context, RB can also be referred to as a physical resource block (PRB). In the frequency domain, an RB can be understood as a subchannel, which can be divided into multiple subcarriers, such as... Figure 2 As shown, a subchannel can be divided into 12 subcarriers; RB occupies one time slot in the time domain, and one time slot can be divided into multiple orthogonal frequency division multiplexing (OFDM) symbols, such as... Figure 2 As shown, a time slot can be divided into 7 OFDM symbols (each column represents one OFDM symbol), and an OFDM symbol is a frequency domain sequence.

[0115] One RB can contain multiple resource elements (REs). An RE refers to a physical resource that occupies one OFDM symbol in the time domain and is a subcarrier in the frequency domain.

[0116] In this embodiment, as Figure 2 As shown, taking one RB in the SL positioning resource pool as an example, the PSCCH and SL-PRS occupy different OFDM symbols, and the SL-PRS uses a comb structure. For example, if Comb=1, then each RE can be used to transmit SL-PRS; if Comb=4, then on an OFDM symbol, every 3 REs must be available for SL-PRS transmission. For example, Figure 2 Comb=2.

[0117] like Figure 2 As shown, if the symbol-level power of SL-PRS and PSCCH is different, an automatic gain control (AGC) symbol can be added, thereby increasing the power conversion time of the terminal equipment when transmitting SL-PRS and PSCCH; the guard period (GP) is used to reserve the time required for the terminal equipment to switch between transmitting and receiving.

[0118] It should be noted that, Figure 2 The physical layer structure shown is merely an exemplary structure applicable to the embodiments of this application and is not intended to limit the embodiments of this application. The power control scheme provided in the embodiments of this application can also be applied to other physical layer structures, for example, it can be applied to the physical layer structure of allocating a portion of time / frequency resources in the existing SL communication resource pool for SL-PRS transmission.

[0119] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems will be described in detail below with specific embodiments. The embodiments of this application will be described below with reference to the accompanying drawings. The following steps can be implemented by software or by a combination of hardware and software.

[0120] Figure 3 This is a schematic diagram illustrating a power control method according to an embodiment of this application. Figure 3 As shown, the method includes steps S310 to S340.

[0121] The method can be executed by the first terminal device or by a component of the first terminal device (such as a processor, chip, or chip system).

[0122] S310, Obtain first information, which includes one or more of the following: SL-PRS power control parameters, maximum transmit power of the first terminal device, number of resource blocks (RBs) occupied by the first resource used to transmit SL-PRS, DL path loss reference signal configuration information, and SL reference signal receive power.

[0123] The power control parameters of the SL-PRS may include at least one of the following: sl-MaxTxPower-SLPRS, a parameter indicating the transmit power of the SL-PRS determined based on the network congestion ratio (CBR) and transmission priority of the first resource in the resource pool; dl-P0-SLPRS, a parameter indicating the first receive power of the SL-PRS expected to be received by the receiving device based on DL power control; dl-Alpha-SLPRS, a parameter indicating the first compensation factor of the first DL path loss based on DL power control; sl-P0-SLPRS, a parameter indicating the second receive power of the SL-PRS expected to be received by the receiving device based on SL power control; and sl-Alpha-SLPRS, a parameter indicating the second compensation factor of the first SL path loss based on SL power control.

[0124] Optionally, the power control parameters of SL-PRS can be configured by network equipment (such as base stations), and this application does not limit the specific configuration process.

[0125] As an example, the value of parameter sl-MaxTxPower-SLPRS can be between -30 and 33, and the unit can be decibel-milliwatt (dBm), milliwatt (mW), or watt (W). The value of parameter dl-P0-SLPRS can be between -202 and 24, and the unit can be dBm, mW, or W. The value of parameter dl-Alpha-SLPRS can be between 0 and 1.

[0126] Optionally, after the network device (such as a base station) configures the SL-PRS power control parameters for the first terminal device, it can transmit them to the first terminal device via radio resource control (RRC) messages.

[0127] As an example, the parameter sl-MaxTxPower-SLPRS can be added to the side-link resource pool (SL-resourcepool) message in the RRC message; the parameters dl-P0-SLPRS, dl-Alpha-SLPRS, sl-P0-SLPRS, and sl-Alpha-SLPRS can be added to the side-link power control (SL-powercontrol) message in the RRC message.

[0128] The maximum transmission power of the first terminal device is determined by the performance of the terminal device itself. This power can be configured in network equipment (such as a base station) or in the terminal device.

[0129] Optionally, if the power is configured in a network device (such as a base station), the base station can send the information to the first terminal device; if the power is configured in a terminal device, the terminal device can access the information.

[0130] The first resource refers to the physical resources in the SL positioning resource pool used for transmitting SL-PRS.

[0131] In one possible implementation, the SL positioning resource pool and the physical layer structure within the resource pool can be pre-configured, and the relevant configuration information can be pre-stored in network devices or terminal devices.

[0132] Optionally, if the configuration information is stored in a network device (such as a base station), the base station can send the number of resource blocks (RBs) occupied by the first resource used for transmitting SL-PRS to the terminal device; if the configuration information is stored in the terminal device, the terminal device can invoke the configuration information.

[0133] In this embodiment, optionally, the DL path loss reference signal configuration information can be configured by network devices (such as base stations), and this application does not specifically limit this.

[0134] For example, the configuration information of DL path loss configured by the base station for the first terminal device can be information from the path loss reference signal parameter package.

[0135] For example, the path loss reference signal parameter package may contain cell indices of one or more network devices. The first terminal device can measure and select the DL path loss reference signal based on the index, and can further determine the DL path loss. The DL path loss reference signal can be a downlink positioning reference signal (DL-PRS) or a synchronization signal / physical broadcast channel block (SS (synchronization signal) / PBCH Block, SSB), and this application does not impose any restrictions on this.

[0136] In this embodiment, optionally, the second terminal device can measure the RSRP of SL based on the DMRS in the SCI signal and feed it back to the first terminal device. The RSRP fed back by the second terminal device is the L1-RSRP. The first terminal device can generate the L3-RSRP by performing layer 3 filtering on the received L1-RSRP, thereby determining the SL path loss. The SL path loss is the difference between the reference signal transmission power and the L3 RSRP.

[0137] S320, determine the first transmission power of the first terminal device when transmitting SL-PRS through the first resource based on the first information.

[0138] For example, after obtaining the first information, a first power set can be determined based on the first information, and a first transmission power can be determined based on the first power set when the first terminal device transmits SL-PRS through the first resource.

[0139] Optionally, the first power set includes at least one of the following powers: the maximum transmission power of the first terminal device, the transmission power of the SL-PRS determined based on the network congestion rate (CBR) and transmission priority of the first resource in the resource pool, the third transmission power, and the fourth transmission power.

[0140] The transmission power of the SL-PRS, determined based on the network congestion rate (CBR) and transmission priority of the first resource in the resource pool, can be indicated by the SL-PRS power control parameter sl-MaxTxPower-SLPRS. If this parameter is not configured, the transmission power of the SL-PRS, determined based on the network congestion rate (CBR) and transmission priority of the first resource in the resource pool, can be equal to the maximum transmission power of the first terminal device.

[0141] The third transmit power is related to the first receive power of the SL-PRS that the receiving device expects to receive, the number of first RBs used to transmit the SL-PRS, the first DL path loss, and the first compensation factor for the first DL path loss.

[0142] In this embodiment, the receiving device can be a second terminal device. The first receiving power can be indicated by the SL-PRS power control parameter dl-P0-SLPRS. If this parameter is not configured, the first receiving power can be the minimum value between the maximum transmission power of the first terminal device and the transmission power of the SL-PRS determined based on the network congestion rate CBR and priority of the first resource in the resource pool. The number of first RBs is the number of RBs occupied by the first resource. The first DL path loss is the DL path loss determined by the first terminal device based on the DL path loss reference signal configuration information configured by the network device (such as a base station) for the SL-PRS. The first compensation factor can be indicated by the SL-PRS power control parameter dl-Alpha-SLPRS. If this parameter is not configured, the first compensation factor can be 1.

[0143] As an example, the third transmit power is related to the first receive power, the number of first RBs, the first DL path loss, and the first compensation factor by the following formula:

[0144]

[0145] in, This is the third transmission power. The first received power is given, and μ is a constant coefficient. For the number of RBs, As the first compensation factor, PL D1 This is the first DL path loss.

[0146] The fourth transmit power is related to the second receive power of the SL-PRS that the receiving device expects to receive, the number of first RBs, the first SL path loss, and the second compensation factor for the first SL path loss.

[0147] The second received power can be indicated by the SL-PRS power control parameter sl-P0-SLPRS. If this parameter is not configured, the second received power can be the minimum value between the maximum transmit power of the first terminal device and the transmit power of the SL-PRS determined based on the network congestion rate CBR and priority of the first resource in the resource pool. The first SL path loss is the SL path loss determined by the first terminal device based on the L3 RSRP generated by the L1 RSRP fed back by the second terminal device. The first SL path loss is the difference between the reference transmit power of the SL-PRS and the L3 RSRP. The second compensation factor can be indicated by the SL-PRS power control parameter sl-Alpha-SLPRS. If this parameter is not configured, the second compensation factor can be 1.

[0148] As an example, the fourth transmit power, the second receive power, the number of first RBs, the first SL path loss, and the second compensation factor satisfy the following relationship:

[0149]

[0150] in, This is the fourth transmission power. This represents the second received power, where μ is a constant coefficient. For the number of RBs, As the second compensation factor, PL SL1 This is the first SL path loss.

[0151] In this embodiment, after determining the first power set based on the first information, the first transmission power of the first terminal device when transmitting SL-PRS through the first resource can be determined based on the first power set. The first transmission power can be the minimum value in the first power set. The first transmission power can also be understood as the power of SL BWP b in carrier f transmitting SL-PRS at transmission time i.

[0152] As an example, the first transmission power can be determined as follows:

[0153]

[0154] or

[0155]

[0156] Among them, P PRS (i) represents the first transmission power, P CMAX P represents the maximum transmission power of the first terminal device. MAX,CBR1 P is the transmission power of SL-PRS determined based on the network congestion rate (CBR) and priority of the first resource in the resource pool. PRS,D For the third transmission power, P PRS,SLThis is the fourth transmission power.

[0157] Wherein, the first transmission power and each power in the first power set are absolute values ​​of power, in dBm.

[0158] It should be understood that different information contained in the first information will result in different power sets and thus different first transmission powers. This application does not specifically limit the information contained in the first information.

[0159] As an example, if the first information only includes the maximum transmission power of the first terminal device, then the first power set only includes the maximum transmission power of the first terminal device and the transmission power of the SL-PRS determined based on the network congestion rate (CBR) and priority of the first resource in the resource pool. In this case, the first transmission power is the maximum transmission power of the first terminal device.

[0160] As an example, if the first information only includes the power control parameters of the SL-PRS, then the first power set only includes the transmission power of the SL-PRS determined based on the network congestion rate (CBR) of the first resource in the resource pool and the transmission priority. In this case, the first transmission power is the transmission power of the SL-PRS determined based on the network congestion rate (CBR) of the first resource in the resource pool and the transmission priority.

[0161] As an example, if the first information includes the maximum transmission power of the first terminal device, the number of first RBs, and the DL path loss reference signal configuration information, then the first power set includes the maximum transmission power of the first terminal device, the transmission power of the SL-PRS determined based on the network congestion rate (CBR) of the first resource in the resource pool and the transmission priority, and the third transmission power. In this case, the first transmission power is the minimum value in the first power set.

[0162] As an example, if the first information includes the maximum transmission power of the first terminal device, the number of first RBs used to transmit SL-PRS, and the SL reference signal reception power, then the first power set includes the maximum transmission power of the first terminal device, the transmission power of SL-PRS determined based on the network congestion rate CBR of the first resource in the resource pool and the transmission priority, and the fourth transmission power. In this case, the first transmission power is the minimum value in the first power set.

[0163] As an example, if the first information includes the power control parameters of SL-PRS, the number of first RBs, and the configuration information of DL path loss reference signals, then the first power set includes the transmission power of SL-PRS and the third transmission power determined based on the network congestion rate CBR of the first resource in the resource pool and the transmission priority. In this case, the first transmission power is the minimum value in the first power set.

[0164] In this embodiment, S310 and S320 provide a power control method for transmitting SL-PRS in SL positioning technology, which can be used to determine the transmission power of SL-PRS.

[0165] S330, obtain second information, which includes one or more of the following: PSCCH power control parameters, maximum transmit power of the first terminal device, number of RBs occupied by the second resource for PSCCH transmission, DL path loss reference signal configuration information, SL reference signal receive power, and the first resource and the second resource belong to the same resource pool.

[0166] The power control parameters of the PSCCH include at least one of the following: parameter sl-MaxTxPower-RS for indicating the transmit power of the PSCCH determined based on the CBR and transmission priority of the second resource in the resource pool; parameter dl-P0-RS for indicating the third receive power of the PSCCH expected to be received by the receiving device based on DL power control; parameter dl-Alpha-RS for indicating the third compensation factor of the second DL path loss based on DL power control; parameter sl-P0-RS for indicating the fourth receive power of the PSCCH expected to be received by the receiving device based on SL power control; and parameter sl-Alpha-RS for indicating the fourth compensation factor of the second SL path loss based on SL power control.

[0167] Optionally, the power control parameters of the PSCCH can be configured by network devices (such as base stations), and this application does not limit the specific configuration process.

[0168] As an example, the value of parameter sl-MaxTxPower-RS can be between -30 and 33, and the unit can be dBm, mW or W; the value of parameter dl-P0-RS can be between -202 and 24, and the unit can be dBm, mW or W; the value of parameter dl-Alpha-RS can be between 0 and 1; the value of parameter sl-P0-RS can be between -202 and 24, and the unit can be dBm, mW or W; the value of parameter sl-Alpha-RS can be between 0 and 1.

[0169] Optionally, after the network device (such as a base station) configures the SL-PRS power control parameters for the first terminal device, it can transmit them to the first terminal device via radio resource control (RRC) messages.

[0170] As an example, the parameter sl-MaxTxPower-RS can be added to the side-link resource pool (SL-resourcepool) message in the RRC message; the parameters dl-P0-RS, dl-Alpha-RS, sl-P0-RS and sl-Alpha-RS can be added to the side-link power control (SL-powercontrol) message in the RRC message.

[0171] The second resource refers to the physical resource used for transmitting PSCCH in the SL positioning resource pool, wherein the first resource and the second resource belong to the same resource pool.

[0172] For details regarding the maximum transmit power of the first terminal device, the configuration information of the DL path loss reference signal, and the receive power of the SL reference signal, please refer to S310; these details will not be repeated here.

[0173] S340, determine the second transmission power when the first terminal device transmits PSCCH through the second resource based on the second information.

[0174] For example, after obtaining the second information, a second power set can be determined based on the second information, and a second transmission power can be determined based on the second power set when the first terminal device transmits PSCCH through the second resource.

[0175] Optionally, the second power set includes at least one of the following powers: the maximum transmission power of the first terminal device, the transmission power of the PSCCH determined based on the network congestion rate (CBR) and transmission priority of the second resource in the resource pool, the fifth transmission power, and the sixth transmission power.

[0176] The transmission power of the PSCCH, determined based on the network congestion rate (CBR) and transmission priority of the second resource in the resource pool, can be indicated by the PSCCH power control parameter sl-MaxTxPower-RS. If this parameter is not configured, the transmission power of the PSCCH, determined based on the network congestion rate (CBR) and transmission priority of the second resource in the resource pool, can be equal to the maximum transmission power of the first terminal device.

[0177] The fifth transmit power is related to the third receive power of the PSCCH that the receiving device expects to receive, the number of second RBs used for PSCCH transmission, the second DL path loss, and the third compensation factor for the second DL path loss.

[0178] In this embodiment, the receiving device can be a second terminal device, and the third receiving power can be indicated by the power control parameter dl-P0-RS of the PSCCH. If this parameter is not configured, the third receiving power can be the minimum value between the maximum transmission power of the first terminal device and the transmission power determined based on the network congestion rate CBR and priority of the second resource in the resource pool. The number of second RBs is the number of RBs occupied by the second resource. The second DL path loss is the DL path loss determined by the first terminal device based on the DL path loss reference signal configuration information configured by the network device (such as the base station) for the PSCCH. The third compensation factor can be indicated by the power control parameter dl-Alpha-RS of the PSCCH. If this parameter is not configured, the first compensation factor can be 1.

[0179] Optionally, if the DL path loss reference signal configuration information configured by the network device (such as a base station) for SL-PRS and PSCCH is consistent, then the first DL path loss and the second DL path loss are the same; if the DL path loss reference signal configuration information configured by the network device (such as a base station) for SL-PRS and PSCCH is inconsistent, considering that the channel transmission environment of SL-PRS and PSCCH is consistent, then the first DL path loss and the second DL path loss can also be considered to be the same.

[0180] As an example, the fifth transmit power can satisfy the following relationship with the third receive power, the number of second RBs, the second DL path loss, and the third compensation factor:

[0181]

[0182] in, This is the fifth transmission power. This represents the third received power, where μ is a constant coefficient. For the number of the second RB, As the third compensation factor, PL D2 This is the second DL path loss.

[0183] The sixth transmit power is related to the fourth receive power of the PSCCH that the receiving device expects to receive, the number of second RBs, the second SL path loss, and the fourth compensation factor for the second SL path loss.

[0184] The fourth receive power can be indicated by the PSCCH power control parameter sl-P0-RS. If this parameter is not configured, the fourth receive power can be the minimum value between the maximum transmit power of the first terminal device and the transmit power of the PSCCH determined based on the network congestion rate CBR and priority of the second resource in the resource pool. The second SL path loss is the SL path loss determined by the first terminal device based on the L3 RSRP generated by the L1 RSRP fed back by the second terminal device. The second SL path loss is the difference between the reference transmit power of the PSCCH and the L3 RSRP. The fourth compensation factor can be indicated by the PSCCH power control parameter sl-Alpha-RS. If this parameter is not configured, the fourth compensation factor can be 1.

[0185] Alternatively, considering that the channel transmission environments of SL-PRS and PSCCH are the same, the first SL path loss and the second SL path loss can be considered to be the same.

[0186] As an example, the sixth transmit power, the fourth receive power, the number of second RBs, the second SL path loss, and the fourth compensation factor can satisfy the following relationship:

[0187]

[0188] in, This is the sixth transmission power. This represents the fourth received power, where μ is a constant coefficient. For the number of the second RB, As the fourth compensation factor, This is the second SL path loss.

[0189] In this embodiment, after determining the second power set based on the second information, the second transmission power when the first terminal device transmits PSCCH through the second resource can be determined based on the second power set. The second transmission power can be the minimum value in the second power set. The second transmission power can also be understood as the power of SL BWP b in carrier f transmitting PSCCH at transmission time i.

[0190] As an example, the second transmission power can be determined as follows:

[0191]

[0192] or

[0193]

[0194] Among them, P PSCCH (i) represents the second transmission power, P CMAX P represents the maximum transmission power of the first terminal device. MAX,CBR2P is the transmission power of the PSCCH determined based on the network congestion rate (CBR) and priority of the second resource in the resource pool. PSCCH,D For the fifth transmission power, P PSCCH,SL This is the sixth transmission power.

[0195] Wherein, the second transmission power and each power in the second power set are absolute values ​​of the power, in dBm.

[0196] It should be understood that different information in the second information will result in different power sets and thus different transmission powers. This application does not specifically limit the information contained in the second information.

[0197] For examples of how different information contained in the second information leads to different second transmission powers, please refer to S320, which will not be repeated here.

[0198] In this embodiment, S330 and S340 provide a power control method for PSCCH transmission in SL positioning technology, which can be used to determine the transmission power of PSCCH.

[0199] In this embodiment of the application, by configuring an independent set of power control parameters for SL-PRS and PSCCH respectively, the first terminal device can determine the transmission power of SL-PRS and PSCCH based on the configured power control parameters, thereby realizing power control in SL positioning technology.

[0200] Furthermore, based on the aforementioned embodiments, in order to ensure the uniform distribution of power in the SL positioning resource pool and the reliability of the SL positioning results, it is necessary to explain the configuration of the power control parameters of SL-PRS and PSCCH.

[0201] In practical applications, the uniform distribution of power in the SL positioning resource pool involves three dimensions: SL-PRS and PSCCH have the same symbol-level power, SL-PRS and PSCCH have the same RB-level power, and SL-PRS and PSCCH have the same RE-level power.

[0202] The fact that SL-PRS and PSCCH have the same symbol-level power can be understood as SL-PRS and PSCCH having the same transmission power on one symbol in a BWP.

[0203] The fact that SL-PRS and PSCCH have the same RB-level power can be understood as SL-PRS and PSCCH having the same transmission power on one symbol of an RB. Furthermore, the fact that SL-PRS and PSCCH have the same RB-level power can also be understood as SL-PRS and PSCCH having the same power spectral density (PSD).

[0204] The fact that SL-PRS and PSCCH have the same RE level power can be understood as meaning that the transmission power of the REs used to transmit SL-PRS and PSCCH is the same. This can also be interpreted as SL-PRS and PSCCH having the same RE level power, or having the same energy per resource element (EPRE).

[0205] In one possible implementation, when the SL-PRS and PSCCH have the same symbol-level power, the third received power is related to the first received power, the number of first RBs, the number of second RBs, and the transmission comb value of the SL-PRS, and the first compensation factor and the third compensation factor are the same; and / or, the fourth received power is related to the second received power, the number of first RBs, the number of second RBs, and the transmission comb value of the SL-PRS, and the second compensation factor and the fourth compensation factor are the same.

[0206] The transfer comb value of SL-PRS is the Comb value of the Comb comb structure used in SL-PRS. For example, Figure 2 The transmission comb value of SL-PRS is 2.

[0207] In this implementation, the third received power is related to the first received power, the number of first RBs, the number of second RBs, and the transmission comb value of SL-PRS. This can be understood as the value of the parameter dl-P0-RS used to indicate the third received power being related to the value of the parameter dl-P0-SLPRS used to indicate the first received power, the number of first RBs, the number of second RBs, and the transmission comb value of SL-PRS. The first compensation factor and the third compensation factor being the same can be understood as the value of the parameter dl-Alpha-SLPRS used to indicate the first compensation factor being the same as the value of the parameter dl-Alpha-RS used to indicate the third compensation factor.

[0208] As an example, the third received power can satisfy the following relationship with the first received power, the number of first RBs, the number of second RBs, and the transmission comb value of SL-PRS:

[0209]

[0210] in, The first received power is given, and Comb is the transmission comb value of SL-PRS. For the number of RBs, For the number of the second RB, This is the third receiving power.

[0211] Accordingly, the relationship between the fourth received power and the second received power, the number of first RBs, the number of second RBs, and the transmission comb value of SL-PRS can be understood as the value of the parameter sl-P0-RS used to indicate the fourth received power being related to the value of the parameter sl-P0-SLPRS used to indicate the second received power, the number of first RBs, the number of second RBs, and the transmission comb value of SL-PRS. The fact that the second compensation factor and the fourth compensation factor are the same can be understood as the value of the parameter sl-Alpha-SLPRS used to indicate the second compensation factor being the same as the value of the parameter sl-Alpha-RS used to indicate the fourth compensation factor.

[0212] As an example, the fourth received power can satisfy the following relationship with the second received power, the number of first RBs, the number of second RBs, and the transmission comb value of SL-PRS:

[0213]

[0214] in, The second received power is denoted by Comb, which represents the transmission comb value of SL-PRS. For the number of RBs, For the number of the second RB, This is the fourth receiving power.

[0215] In this implementation, SL-PRS and PSCCH have the same symbol-level power, which means that the terminal device does not need additional power conversion time when transmitting SL-PRS and PSCCH, reducing the difficulty of implementing the power control scheme for SL positioning. Furthermore, there is no need to set additional AGC symbols in the resource pool, which improves the utilization rate of the resource pool.

[0216] In one possible implementation, when the SL-PRS and PSCCH have the same RB-level power, the first received power is the same as the third received power, and the first compensation factor is the same as the third compensation factor; and / or, the second received power is the same as the fourth received power, and the second compensation factor is the same as the fourth compensation factor.

[0217] In this implementation, the fact that the first received power and the third received power are the same can be understood as the value of the parameter dl-P0-SLPRS used to indicate the first received power being the same as the value of the parameter dl-P0-RS used to indicate the third received power. Similarly, the fact that the first compensation factor and the third compensation factor are the same can be understood as the value of the parameter dl-Alpha-SLPRS used to indicate the first compensation factor being the same as the value of the parameter dl-Alpha-RS used to indicate the third compensation factor.

[0218] Accordingly, the fact that the second received power is the same as the fourth received power can be understood as the value of the parameter sl-P0-SLPRS used to indicate the second received power being the same as the value of the parameter sl-P0-RS used to indicate the fourth received power. Similarly, the fact that the second compensation factor is the same as the fourth compensation factor can be understood as the value of the parameter sl-Alpha-SLPRS used to indicate the second compensation factor being the same as the value of the parameter sl-Alpha-RS used to indicate the fourth compensation factor.

[0219] In this implementation, SL-PRS and PSCCH have the same RB-level power, ensuring that the power control schemes for SL technologies (such as SL positioning and SL communication) all use the same PSD power control scheme, guaranteeing consistency in power control implementation across SL technologies. Furthermore, during SL positioning and SL communication, the second terminal device needs to demodulate the received signal after receiving it from the first terminal device, and this demodulation process must be implemented in the RB. Therefore, this implementation also allows the terminal device to use the same signal demodulation scheme as existing SL communication during SL positioning, eliminating the need to reconfigure the signal demodulation scheme for SL positioning, simplifying the implementation of the SL positioning power control scheme, and saving resources.

[0220] In one possible implementation, when the SL-PRS and PSCCH have the same EPRE, the third received power is related to the first received power and the transmission comb value of the SL-PRS, and the first compensation factor and the third compensation factor are the same; and / or, the fourth received power is related to the second received power and the transmission comb value of the SL-PRS, and the second compensation factor and the fourth compensation factor are the same.

[0221] In this implementation, the relationship between the third received power and the first received power and the transmission comb value of SL-PRS can be understood as the relationship between the value of the parameter dl-P0-RS used to indicate the third received power and the value of the parameter dl-P0-SLPRS used to indicate the first received power and the transmission comb value of SL-PRS. The fact that the first compensation factor and the third compensation factor are the same can be understood as the fact that the value of the parameter dl-Alpha-SLPRS used to indicate the first compensation factor is the same as the value of the parameter dl-Alpha-RS used to indicate the third compensation factor.

[0222] As an example, the third received power, the first received power, and the transmission comb value of SL-PRS can satisfy the following relationship:

[0223]

[0224] in, The first received power is given, and Comb is the transmission comb value of SL-PRS. This is the third receiving power.

[0225] Accordingly, the relationship between the fourth received power and the second received power and the transmission comb value of SL-PRS can be understood as the relationship between the value of the parameter sl-P0-RS used to indicate the fourth received power and the value of the parameter sl-P0-SLPRS used to indicate the second received power and the transmission comb value of SL-PRS. The fact that the second compensation factor and the fourth compensation factor are the same can be understood as the fact that the value of the parameter sl-Alpha-SLPRS used to indicate the second compensation factor is the same as the value of the parameter sl-Alpha-RS used to indicate the fourth compensation factor.

[0226] As an example, the fourth received power, the second received power, and the transmission comb value of SL-PRS can satisfy the following relationship:

[0227]

[0228] in, The second received power is denoted by Comb, which represents the transmission comb value of SL-PRS. This is the fourth receiving power.

[0229] In this implementation, SL-PRS and PSCCH have the same EPRE, which allows the second terminal device to use the same resource detection method as existing SL communication when detecting information sent by the first terminal device. This simplifies the implementation process of the power control scheme for SL positioning and saves resources.

[0230] Figure 4 This is a schematic diagram of a power control device provided in one embodiment of this application. Figure 4The device 400 shown can be used to implement Figure 3 The various steps performed by the base station or the first terminal device. For example... Figure 4 As shown, the device 400 in this embodiment may include a processing module 410 and a transceiver module 420.

[0231] Device 400 is used to achieve Figure 3 In the method shown, the processing module 410 can be used to implement the operations performed by the first terminal device in S320 and S340; the transceiver module 420 can be used to implement the operations performed by the first terminal device in S310 and S330, and the transceiver module is also used to implement the operations performed by the base station in S310 and S330.

[0232] It should be understood that device 400 is embodied in the form of functional modules. The term "module" can refer to application-specific integrated circuits (ASICs), electronic circuits, processors (e.g., shared processors, proprietary processors, or group processors, etc.) and memories for executing one or more software or firmware programs, integrated logic circuits, and / or other suitable components supporting the described functions. In an alternative example, those skilled in the art will understand that device 400 may be specifically the first terminal device or base station in the above method embodiments, or the functions of the first terminal device or base station in the above method embodiments may be integrated into device 400. Device 400 may be used to execute the various processes and / or steps corresponding to the first terminal device or base station in the above method embodiments. To avoid repetition, these will not be described again here.

[0233] Figure 5 This is a schematic diagram of a power control device provided in another embodiment of this application. Figure 5 As shown, the device 500 is used to implement the method executed by the first terminal device or base station in any of the foregoing embodiments.

[0234] like Figure 5 As shown, the device 500 in this embodiment includes a memory 510, a processor 520, a communication interface 530, and a bus 540. The memory 510, processor 520, and communication interface 530 are interconnected via the bus 540.

[0235] The memory 510 can be a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 510 can store programs, and when the program stored in the memory 510 is executed by the processor 520, the processor 520 uses it to execute... Figure 3The various steps performed by the first terminal device or base station.

[0236] The processor 520 can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits to execute relevant programs.

[0237] The processor 520 can also be an integrated circuit chip with signal processing capabilities. In implementation, the various related steps in the embodiments of this application can be completed by the integrated logic circuitry in the processor 520 or by software instructions.

[0238] The processor 520 described above can also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor, etc.

[0239] The steps of the method disclosed in the embodiments of this application can be directly manifested as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory 510, and processor 520 reads the information in memory 510 and, in conjunction with its hardware, completes the functions required by the units included in the device of this application.

[0240] The communication interface 530 can use, but is not limited to, transceivers to enable communication between the device 500 and other devices or apparatuses.

[0241] Bus 540 may include a pathway for transmitting information between various components of device 500 (e.g., memory 510, processor 520, communication interface 530).

[0242] Some embodiments of this application also provide a computer program product, which, when running on a processor, can implement the methods implemented by the terminal device or base station in any of the above embodiments, for example, when determining the transmission power of SL-PRS and PSCCH. Some embodiments of this application also provide a computer-readable storage medium containing computer instructions, which, when running on a processor, can implement the methods implemented by the first terminal device or base station in any of the above embodiments.

[0243] It should be noted that the modules or components shown in the above embodiments can be one or more integrated circuits configured to implement the above methods, such as one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs), etc. Furthermore, when a module is implemented by a processing element calling program code, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processors capable of calling program code, such as a controller. Additionally, these modules can be integrated together to implement a system-on-a-chip (SOC).

[0244] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, software modules, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., a solid-state disk (SSD)).

[0245] The term "multiple" in this document refers to two or more. The term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Furthermore, the character " / " in this document generally indicates an "or" relationship between the preceding and following related objects; in formulas, " / " indicates a "division" relationship. Additionally, it should be understood that in the description of this application, words such as "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or order.

[0246] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

[0247] It is understood that, in the embodiments of this application, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

Claims

1. A power control method, characterized in that, The method is applied to a terminal device, and the method includes: Obtain first information, which includes: power control parameters of the sidelink positioning reference signal SL-PRS, the maximum transmit power of the terminal device, the number of resource blocks RB occupied by the first resource for transmitting SL-PRS, downlink path loss reference signal configuration information, and SL reference signal receive power; The first transmission power of the terminal device when transmitting SL-PRS through the first resource is determined based on the first information; Obtain the second information, which includes: power control parameters of the physical side line control channel (PSCCH), the maximum transmit power of the terminal device, the number of RBs occupied by the second resource for PSCCH transmission, DL path loss reference signal configuration information, and SL reference signal receive power. The first resource and the second resource belong to the same resource pool. The second transmission power of the terminal device when transmitting PSCCH through the second resource is determined based on the second information; When transmitting SL-PRS and PSCCH in the same resource pool, the SL-PRS and PSCCH have the same power spectral density.

2. The method according to claim 1, characterized in that, The first transmission power is the minimum value in the first power set, which includes at least one of the following powers: the maximum transmission power of the terminal device, the transmission power determined based on the network congestion rate and transmission priority of the first resource in the resource pool, the third transmission power, and the fourth transmission power. The third transmission power is related to the first receiving power of the SL-PRS that the receiving device expects to receive, the number of first RBs, the first DL path loss, and the first compensation factor of the first DL path loss. The fourth transmission power is related to the second receiving power of the SL-PRS that the receiving device expects to receive, the number of first RBs, the first SL path loss, and the second compensation factor of the first SL path loss. The number of first RBs is the number of RBs occupied by the first resource.

3. The method according to claim 2, characterized in that, The second transmission power is the minimum value in the second power set, which includes at least one of the following powers: the maximum transmission power of the terminal device, the transmission power determined based on the network congestion rate and transmission priority of the second resource in the resource pool, the fifth transmission power, and the sixth transmission power. The fifth transmission power is related to the third receiving power of the PSCCH that the receiving device expects to receive, the number of second RBs, the second DL path loss, and the third compensation factor of the second DL path loss. The sixth transmission power is related to the fourth receiving power of the PSCCH that the receiving device expects to receive, the number of second RBs, the second SL path loss, and the fourth compensation factor of the second SL path loss. The number of second RBs is the number of RBs occupied by the second resource.

4. The method according to claim 3, characterized in that, The first received power is the same as the third received power, and the first compensation factor and the third compensation factor are the same; and / or, The second received power is the same as the fourth received power, and the second compensation factor is the same as the fourth compensation factor.

5. The method according to claim 3, characterized in that, The third received power is related to the first received power and the transmission comb value of SL-PRS, and the first compensation factor and the third compensation factor are the same; and / or, The fourth received power is related to the second received power and the transmission comb value of SL-PRS, and the second compensation factor and the fourth compensation factor are the same.

6. The method according to claim 5, characterized in that, The third received power, the first received power, and the transmission comb value of SL-PRS satisfy the following relationship: in, The first received power is denoted by , and Comb is the transmission comb value of SL-PRS. The third received power.

7. The method according to claim 5 or 6, characterized in that, The fourth received power, the second received power, and the transmission comb value of SL-PRS satisfy the following relationship: in, The second received power is denoted by , and Comb is the transmission comb value of SL-PRS. This refers to the fourth received power.

8. The method according to claim 3, characterized in that, The third received power is related to the first received power, the number of the first RBs, the number of the second RBs, and the transmission comb value of the SL-PRS, and the first compensation factor and the third compensation factor are the same; and / or, The fourth received power is related to the second received power, the number of the first RBs, the number of the second RBs, and the transmission comb value of the SL-PRS, and the second compensation factor and the fourth compensation factor are the same.

9. The method according to claim 8, characterized in that, The third received power satisfies the following relationship with the first received power, the number of the first RBs, the number of the second RBs, and the transmission comb value of the SL-PRS: in, The first received power is denoted by , and Comb is the transmission comb value of SL-PRS. The number of the first RB, The number of the second RB, The third received power.

10. The method according to claim 8 or 9, characterized in that, The fourth received power is related to the second received power, the number of the first RBs, the number of the second RBs, and the transmission comb value of the SL-PRS by the following formula: in, The second received power is denoted by , and Comb is the transmission comb value of SL-PRS. The number of the first RB, The number of the second RB, This refers to the fourth received power.

11. The method according to claim 2, characterized in that, The third transmit power is related to the first receive power, the number of first RBs, the first DL path loss, and the first compensation factor by the following formula: in, The third transmission power, Let μ be the first received power, and μ be a constant coefficient. The number of the first RB, PL is the first compensation factor. D1 This is the path loss of the first DL.

12. The method according to claim 2, characterized in that, The fourth transmit power, the second receive power, the number of the first RBs, the first SL path loss, and the second compensation factor satisfy the following relationship: in, For the fourth transmission power, The second received power is given by μ, which is a constant coefficient. The number of the first RB, PL is the second compensation factor. SL1 This is the first SL path loss.

13. The method according to claim 3, characterized in that, The fifth transmit power, the third receive power, the number of the second RBs, the second DL path loss, and the third compensation factor satisfy the following relationship: in, For the fifth transmission power, The third received power is μ, which is a constant coefficient. The number of the second RB, For the third compensation factor, PL D2 This is the path loss of the second DL.

14. The method according to claim 3, characterized in that, The sixth transmit power, the fourth receive power, the number of second RBs, the second SL path loss, and the fourth compensation factor satisfy the following relationship: in, For the sixth transmission power, The fourth received power is given, where μ is a constant coefficient. The number of the second RB, This is the fourth compensation factor. This is the second SL path loss.

15. A power control method, characterized in that, The method is applied to base station equipment, and the method includes: Send first information, which includes: power control parameters of the sidelink positioning reference signal SL-PRS, power control parameters of the physical sidelink control channel PSCCH, maximum transmit power of the terminal device, number of resource blocks (RBs) occupied by the first resource for transmitting SL-PRS, number of RBs occupied by the second resource for transmitting PSCCH, and downlink path loss reference signal configuration information, wherein the first resource and the second resource belong to the same resource pool. The first information is used to ensure that when the terminal device transmits SL-PRS and PSCCH in the same resource pool, the SL-PRS and the PSCCH have the same power spectral density.

16. The method according to claim 15, characterized in that, The power control parameters of the SL-PRS in the first information include at least one of the following: a parameter for indicating the transmission power of the SL-PRS determined based on the network congestion rate and transmission priority of the first resource in the resource pool, a parameter for indicating the first receiving power of the SL-PRS that the receiving device expects to receive, a parameter for indicating the first compensation factor of the first DL path loss, a parameter for indicating the second receiving power of the SL-PRS that the receiving device expects to receive, and a parameter for indicating the second compensation factor of the first SL path loss. The first information is used to enable the terminal device to determine, based on the power control parameters of the SL-PRS, the minimum value of the first power set when the terminal device transmits SL-PRS through the first resource. The first power set includes at least one of the following powers: the maximum transmission power of the terminal device, the transmission power determined based on the network congestion rate and transmission priority of the first resource in the resource pool, the third transmission power related to the first receiving power, the number of first RBs, the first DL path loss and the first compensation factor, and the fourth transmission power related to the second receiving power, the number of first RBs, the first SL path loss and the second compensation factor. The number of first RBs is the number of RBs occupied by the first resource.

17. The method according to claim 16, characterized in that, The power control parameters of the PSCCH in the first information include at least one of the following: a parameter indicating the transmission power of the PSCCH determined based on the network congestion rate and transmission priority of the second resource in the resource pool; a parameter indicating the third reception power of the PSCCH that the receiving device expects to receive; a parameter indicating the third compensation factor for the second DL path loss; a parameter indicating the fourth reception power of the PSCCH that the receiving device expects to receive; and a parameter indicating the fourth compensation factor for the second SL path loss. The first information is used to enable the terminal device to determine, based on the power control parameters of the PSCCH, that the second transmission power of the terminal device transmitting the PSCCH through the second resource is the minimum value in the second power set. The second power set includes at least one of the following powers: the maximum transmission power of the terminal device; the transmission power determined based on the network congestion rate and transmission priority of the second resource in the resource pool; a fifth transmission power related to the third reception power, the number of second RBs, the second DL path loss, and the third compensation factor; and a sixth transmission power related to the fourth reception power, the number of second RBs, the second SL path loss, and the fourth compensation factor. The number of second RBs is the number of RBs occupied by the second resource.

18. The method according to claim 17, characterized in that, The first received power is the same as the third received power, and the first compensation factor and the third compensation factor are the same; and / or, The second received power is the same as the fourth received power, and the second compensation factor is the same as the fourth compensation factor.

19. The method according to claim 17, characterized in that, The third received power is related to the first received power and the transmission comb value of SL-PRS, and the first compensation factor and the third compensation factor are the same; and / or, The fourth received power is related to the second received power and the transmission comb value of SL-PRS, and the second compensation factor and the fourth compensation factor are the same.

20. The method according to claim 19, characterized in that, The third received power, the first received power, and the transmission comb value of SL-PRS satisfy the following relationship: in, The first received power is denoted by , and Comb is the transmission comb value of SL-PRS. The third received power.

21. The method according to claim 19 or 20, characterized in that, The fourth received power, the second received power, and the transmission comb value of SL-PRS satisfy the following relationship: in, The second received power is denoted by , and Comb is the transmission comb value of SL-PRS. This refers to the fourth received power.

22. The method according to claim 17, characterized in that, The third received power is related to the first received power, the number of the first RBs, the number of the second RBs, and the transmission comb value of the SL-PRS, and the first compensation factor and the third compensation factor are the same; and / or, The fourth received power is related to the second received power, the number of the first RBs, the number of the second RBs, and the transmission comb value of the SL-PRS, and the second compensation factor and the fourth compensation factor are the same.

23. The method according to claim 22, characterized in that, The third received power satisfies the following relationship with the first received power, the number of the first RBs, the number of the second RBs, and the transmission comb value of the SL-PRS: in, The first received power is denoted by , and Comb is the transmission comb value of SL-PRS. The number of the first RB, The number of the second RB, The third received power.

24. The method according to claim 22 or 23, characterized in that, The fourth received power is related to the second received power, the number of the first RBs, the number of the second RBs, and the transmission comb value of the SL-PRS by the following formula: in, The second received power is denoted by , and Comb is the transmission comb value of SL-PRS. The number of the first RB, The number of the second RB, This refers to the fourth received power.

25. The method according to claim 16, characterized in that, The third transmit power is related to the first receive power, the number of first RBs, the first DL path loss, and the first compensation factor by the following formula: in, The third transmission power, Let μ be the first received power, and μ be a constant coefficient. The number of the first RB, PL is the first compensation factor. D1 This is the path loss of the first DL.

26. The method according to claim 16, characterized in that, The fourth transmit power, the second receive power, the number of the first RBs, the first SL path loss, and the second compensation factor satisfy the following relationship: in, For the fourth transmission power, The second received power is given by μ, which is a constant coefficient. The number of the first RB, PL is the second compensation factor. SL1 This is the first SL path loss.

27. The method according to claim 17, characterized in that, The fifth transmit power, the third receive power, the number of the second RBs, the second DL path loss, and the third compensation factor satisfy the following relationship: in, For the fifth transmission power, The third received power is μ, which is a constant coefficient. The number of the second RB, For the third compensation factor, PL D2 This is the path loss of the second DL.

28. The method according to claim 17, characterized in that, The sixth transmit power, the fourth receive power, the number of second RBs, the second SL path loss, and the fourth compensation factor satisfy the following relationship: in, For the sixth transmission power, The fourth received power is given, where μ is a constant coefficient. The number of the second RB, This is the fourth compensation factor. This is the second SL path loss.

29. A power control device, characterized in that, It includes various functional modules for implementing the method as claimed in any one of claims 1 to 14 or any one of claims 15 to 28.

30. A power control device, characterized in that, include: A processor coupled to a memory for storing a computer program, which, when invoked by the processor, causes the apparatus to perform the method as claimed in any one of claims 1 to 14 or any one of claims 15 to 28.

31. A computer-readable medium, characterized in that, The computer-readable medium stores program code for computer execution, the program code including instructions for performing the method as claimed in any one of claims 1 to 14 or any one of claims 15 to 28.

32. A computer program product, characterized in that, It includes computer program code that, when run on a computer, causes the computer to implement the method as claimed in any one of claims 1 to 14 or any one of claims 15 to 28.

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