Power control method, transmission resource determination method, device, terminal, and medium

Abstract

The present application discloses a power control method, a transmission resource determination method, a device, a terminal, and a storage medium, which relate to the communication technology field, and includes: obtaining power control setting information; and determining whether to perform power control when transmitting sidelink data based on the power control setting information. According to the present application, all terminals using the same resource pool do not perform power control, thereby avoiding a problem in which, when a terminal employing a unicast transmission scheme performs power control on a certain resource, a terminal employing a broadcast transmission scheme determines that the resource is available during sensing and preempts the resource, resulting in transmission collision.

Description

[Technical field]

[0001] This application claims priority to PCT application No. PCT / CN2019 / 115434, filed on November 4, 2019, and entitled "Power control method, transmission resource determination method, device, terminal and medium," the entire contents of which are incorporated herein by reference. The present application relates to the field of mobile communications, and in particular to a power control method, a transmission resource determination method, an apparatus, a terminal and a medium. [Background technology]

[0002] The communication system between vehicles and things supports Device to Device (D2D) communication. Direct communication between two terminals can be realized by SideLink (SL). The communication system between vehicles and things currently supports three transmission methods: unicast, multicast and broadcast.

[0003] In the broadcast transmission mode, in order to allow more receiving terminals to receive data, the sending terminal transmits data with the maximum transmission power; however, in the unicast transmission mode or multicast transmission mode, the receiving terminal is one terminal or a set of terminals, so the sending terminal can adjust its own transmission power according to the channel quality of the sidelink to achieve the purpose of energy saving.

[0004] In the process of use, the transmission power of a terminal adopting a unicast transmission method or a multicast transmission method when transmitting sidelink data in a certain resource is relatively small, so that a terminal adopting a broadcast transmission method may occupy the resource due to sensing error, which may lead to transmission collision. Therefore, how to perform reasonable power control in a vehicle-to-object communication system is an issue that needs to be resolved as soon as possible. Summary of the Invention [Problem to be solved by the invention]

[0005] The embodiments of the present application provide a power control method, a transmission resource determination method, an apparatus, a terminal and a medium, which can be used to solve the problem of how to perform reasonable power control in a vehicle-to-object communication system. The technical solutions are as follows: [Means for solving the problem]

[0006] According to one aspect of the present application, there is provided a power control method applied to a first terminal, the method comprising: Obtaining power control configuration information; and determining whether to perform power control when transmitting sidelink data based on the power control setting information.

[0007] According to another aspect of the present application, there is provided a power control method applied to a network side device or a second terminal, the method comprising: generating power control setting information, the power control setting information being used to instruct the first terminal whether to perform power control when transmitting sidelink data; and transmitting the power control setting information.

[0008] According to another aspect of the present application, there is provided a method for determining a transmission resource applied to a first terminal, the method comprising: Obtaining a first Reference Signal Receiving Power (RSRP) threshold and a second RSRP threshold; and determining whether the transmission resource is an available candidate transmission resource using the first RSRP threshold or the second RSRP threshold when determining a candidate transmission resource for D2D.

[0009] According to another aspect of the present application, there is provided a method for determining a transmission resource applied to a network side device, the method comprising: The method includes transmitting a first RSRP threshold and a second RSRP threshold to a terminal, and the terminal uses the first RSRP threshold or the second RSRP threshold to determine whether the transmission resource is a usable candidate transmission resource when determining a candidate transmission resource for device-to-device (D2D).

[0010] According to another aspect of the present application, there is provided a power control device, the device comprising: an acquisition module used for acquiring power control setting information; determining whether to perform power control when transmitting sidelink data based on the power control setting information; Decision module used in And, it is equipped with.

[0011] According to another aspect of the present application, there is provided a power control device, the device comprising: a generating module and a transmitting module; The generating module is used for generating power control setting information, and the power control setting information is used for instructing a first terminal whether to perform power control when transmitting sidelink data; The transmitting module is used for transmitting the power control setting information.

[0012] According to another aspect of the present application, there is provided an apparatus for determining a transmission resource applied to a first terminal, the apparatus comprising: an acquisition module for acquiring a first RSRP threshold and a second RSRP threshold; a processing module adapted to determine whether the transmission resource is an available candidate transmission resource using the first RSRP threshold or the second RSRP threshold when determining candidate transmission resources for D2D.

[0013] According to another aspect of the present application, Transmission resource determination device wherein the device comprises a transmission module; The transmitting module is used for transmitting a first RSRP threshold and a second RSRP threshold to a terminal, and the terminal is used for determining whether the transmission resource is an available candidate transmission resource using the first RSRP threshold or the second RSRP threshold when determining a candidate transmission resource for device-to-device (D2D).

[0014] According to another aspect of the present application, there is provided a terminal, the terminal comprising: A processor; a transceiver coupled to said processor; a memory adapted to store executable instructions for said processor; The processor is configured to load and execute the executable instructions to implement the power control method or the transmission resource determination method described above.

[0015] According to another aspect of the present application, there is provided a network side device, comprising: A processor; a transceiver coupled to said processor; a memory adapted to store executable instructions for said processor; The processor is configured to load and execute the executable instructions to implement the power control method or the transmission resource determination method described above.

[0016] According to another aspect of the present application, there is provided a computer readable storage medium having executable instructions stored thereon, the executable instructions being loaded and executed by the processor to implement the power control method described above. Effect of the Invention

[0017] The technical solutions according to the embodiments of the present application at least include the following beneficial effects:

[0018] By instructing the first terminal that it is not necessary to perform power control using the power control setting information, the terminal using the resource pool (or resource) does not need to perform power control when transmitting sidelink data (i.e., power control based on sidelink path loss is not performed, and power control based on downlink path loss is not performed), and the first terminal can transmit sidelink data at maximum transmission power. Therefore, all terminals using the same resource pool do not perform power control, and this makes it possible to avoid a problem in which, when a terminal using a unicast transmission method performs power control on a certain resource, a terminal using a broadcast transmission method determines that the resource is available when performing sensing, and preempts the resource, resulting in transmission collision. [Brief description of the drawings]

[0019] In order to more clearly explain the technical solutions in the embodiments of the present application, the following provides a brief description of the drawings necessary for describing the embodiments. It should be apparent that the drawings in the following description are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without exerting any creative effort.

[0020] [Figure 1] FIG. 1 is a block diagram of a vehicle-to-object communication system according to one exemplary embodiment of the present application. [Diagram 2] FIG. 2 is a principle schematic diagram of sensing communication resources between a vehicle and an object according to an exemplary embodiment of the present application. [Diagram 3] FIG. 3 is a schematic diagram of a sidelink feedback channel according to one exemplary embodiment of the present application. [Figure 4] FIG. 4 is a schematic diagram of a power control method according to one exemplary embodiment of the present application. [Diagram 5] FIG. 5 is a schematic diagram of a scene in which a broadcast terminal interferes with a unicast terminal according to one exemplary embodiment of the present application. [Figure 6]FIG. 6 is a flow chart of a power control method according to one exemplary embodiment of the present application. [Figure 7] FIG. 7 is a flow chart of a power control method according to one exemplary embodiment of the present application. [Figure 8] FIG. 8 is a flow chart of a power control method according to one exemplary embodiment of the present application. [Figure 9] FIG. 9 is a flow chart of a power control method according to one exemplary embodiment of the present application. [Figure 10] FIG. 10 is a flowchart of a method for determining transmission resources according to an exemplary embodiment of the present application. [Figure 11] FIG. 11 is a block diagram of a power control device according to one exemplary embodiment of the present application. [Figure 12] FIG. 12 is a block diagram of a power control device according to one exemplary embodiment of the present application. [Figure 13] FIG. 13 is a block diagram of a power control device according to one exemplary embodiment of the present application. [Figure 14] FIG. 14 is a block diagram of a transmission resource determining apparatus according to one exemplary embodiment of the present application. [Figure 15] FIG. 15 is a block diagram of a terminal according to one exemplary embodiment of the present application. [Figure 16] FIG. 16 is a block diagram of a network side device according to an exemplary embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application are described in more detail with reference to the drawings.

[0022] First, some technical terms related to this application will be explained.

[0023] D2D / V2X

[0024] Vehicle to Everything (V2X) is a sidelink (SL) transmission technology based on D2D communication. Unlike conventional cellular systems where communication data is received or transmitted by a base station, the vehicle to everything system adopts a direct communication method from terminal to terminal, which has higher spectrum efficiency and lower transmission delay. 3GPP defines two transmission modes, Mode A and Mode B.

[0025] For mode A, the transmission resources of the terminal 120 are allocated by the base station 140 in the downlink, and the terminal 120 transmits data in the sidelink based on the transmission resources allocated by the base station 140. As shown in FIG. 1, the base station 140 may allocate the transmission resources for one-time transmission to the terminal 120, or may allocate the transmission resources for semi-static transmission to the terminal 120.

[0026] In mode B, the terminal 120 selects one resource from the resource pool to transmit data. Specifically, the terminal 120 may select a transmission resource from the resource pool in a sensing manner, or may select a transmission resource from the resource pool in a random selection manner.

[0027] V2X Transmission Resource Selection

[0028] As shown in Fig. 2, when a new data packet arrives at time n, resource selection needs to be performed. Based on the sensing result in the past 1 second, the terminal performs resource selection at [n+T1,n+T2] milliseconds, where T1≦4 milliseconds and 20 milliseconds≦T2≦100 milliseconds.

[0029] When the terminal performs resource selection in the selection window, the terminal puts all resources in the resource selection window into set A as candidate transmission resources, and the terminal eliminates elements in set A based on the sensing result. The specific elimination process is as follows:

[0030] 1. If there is no result of the terminal sensing subframes in the sensing window, the resources in the corresponding subframes in the selection window of these subframes are excluded.

[0031] 2. The terminal detects a PSCCH in a sensing window, and if the RSRP of the scheduled PSSCH is higher than a threshold, and there is a resource collision between the reserved transmission resource determined based on the reservation information in the control information and the data waiting to be transmitted by this user, the user excludes the resource from set A.

[0032] 3. If the number of resources remaining in set A is less than 20% of the total number of resources, the terminal increases the PSSCH-RSRP threshold by 3 dB, and repeats steps 1 to 2 until the number of resources remaining in set A is greater than 20% of the total number of resources.

[0033] 4. The terminal performs S-RSSI (Sidelink Received Signal Strength Indicator) detection on the resources remaining in set A, and sorts them based on energy strength. The resources with the lowest energy (referring to the number of resources in set A) are added to set B.

[0034] 5. The terminal selects one resource from set B with the same probability to transmit data.

[0035] Sidelink Feedback Channel

[0036] To improve reliability, a sidelink feedback channel is introduced in V2X. For example, for unicast transmission, the transmitting terminal transmits sidelink data (including the physical sidelink control channel (PSCCH) and the physical sidelink shared channel (PSSCH)) to the receiving terminal, the receiving terminal transmits HARQ feedback information to the transmitting terminal, and the transmitting terminal determines whether retransmission is necessary based on the feedback information of the receiving terminal. As shown in Figure 3, the HARQ feedback information is carried in the sidelink feedback channel (PSFCH).

[0037] Power Control

[0038] For the broadcast transmission method, in order to allow more terminals to receive the data, the transmitting terminal usually transmits the data with the maximum transmission power. However, for unicast transmission or multicast transmission, the receiving terminal is one terminal or one set of terminals, so that the transmitting terminal can adjust the transmission power according to the sidelink situation to achieve the purpose of energy saving and reduce interference to other transmission links. In NR-V2X, the receiving terminal measures based on the sidelink reference signal transmitted from the transmitting terminal, for example, measures the RSRP of the reference signal and feeds back the RSRP to the transmitting side, and the transmitting side estimates the sidelink path loss and adjusts the transmission power based on the sidelink path loss. Or, the receiving terminal measures the sidelink reference signal, estimates the sidelink path loss, and feeds back the sidelink path loss to the transmitting terminal, and the transmitting terminal performs power control based on the sidelink path loss.

[0039] Furthermore, as shown in Figure 4, when a terminal is within a cell range and the same carrier is used for sidelink transmission and uplink transmission, in order to avoid sidelink data transmission from interfering with uplink data transmission, the terminal needs to perform power control based on downlink path loss. The terminal measures and obtains the downlink path loss based on the downlink reference signal, and determines the transmission power based on the downlink path loss.

[0040] After the power control is introduced, if the transmission power of a terminal adopting a unicast transmission method is reduced, it will affect the sensing process of other terminals. As shown in FIG. 5, UE1 and UE2 perform unicast communication, and UE3 is a broadcast user. When UE1 and UE2 perform unicast communication, they perform power control. Because the distance between UE1 and UE2 is close, the transmission power of UE1 is low, for example, 10 dBm. When UE3 senses, the transmission power of UE1 is low, so the PSSCH-RSRP of UE1 measured by UE3 is low, and it is recognized that the interference in the transmission resource used by UE1 is low. Therefore, the transmission resource is regarded as a usable resource. When UE3 selects the transmission resource to perform broadcast transmission, in order to ensure that the data of UE3 is received by more users, for example, UE4, UE3 usually transmits at the maximum power (for example, 23 dBm). Therefore, the signal of UE3 interferes with the reception by UE2, which causes UE2 to fail to receive the data from UE1.

[0041] The terminals may include handheld devices with various wireless communication capabilities, in-vehicle devices, wearable devices, computing devices or other processing devices connected to wireless modems, and various forms of user equipment (UE), mobile stations (MS), terminal devices, etc. For convenience of description, the above devices are collectively referred to as terminals or UEs.

[0042] FIG. 6 shows a flowchart of a power control method according to an exemplary embodiment of the present application. The embodiment is described by taking the method as an example executed by a first terminal. The method includes the following steps: Steps 602 and 604 Includes.

[0043] Step 602 In the step S100, the power control setting information is acquired.

[0044] As an option, the first terminal obtains preset power control setting information, or the first terminal receives power control setting information transmitted from a network side device, or the first terminal receives power control setting information transmitted from a second terminal.

[0045] Alternatively, the power control configuration information is included in resource pool (or sidelink transmission resource pool, or D2D resource pool, or V2X resource pool) configuration information, and the power control configuration information is used to indicate whether to perform power control on transmission resources in the resource pool. Alternatively, the transmission resources in the resource pool are used to transmit at least two types of data among unicast sidelink data, multicast sidelink data, and broadcast sidelink data. Alternatively, the transmission resources in the resource pool are selected and used after sensing of a plurality of terminals. The plurality of terminals include terminals adopting a unicast transmission scheme, terminals adopting a multicast transmission scheme, and terminals adopting a broadcast transmission scheme.

[0046] Step 604 In the power control setting information, it is determined whether to perform power control when transmitting sidelink data.

[0047] Illustratively, the above "power control" includes at least one of the following three forms:

[0048] 1. Based on the power control setting information, determine whether to perform power control based on a sidelink path loss when transmitting sidelink data. 2. Based on the power control setting information, determine whether to perform power control based on a downlink path loss when transmitting sidelink data. 3. Based on the power control setting information, determine whether to perform power control on a PSCCH when transmitting sidelink data.

[0049] In summary, in the method according to the embodiment, by instructing the first terminal that it is not necessary to perform power control by the power control setting information, the terminal using the resource pool (or resource) does not need to perform power control when transmitting sidelink data (i.e., power control based on sidelink path loss is not performed, and power control based on downlink path loss is not performed), and the first terminal can transmit the sidelink data at maximum transmission power. Therefore, all terminals using the same resource pool do not perform power control, and this can avoid the problem that when a terminal using a unicast transmission method performs power control on a certain resource, a terminal using a broadcast transmission method determines that the resource is available when performing sensing, and preempts the resource, resulting in transmission collision.

[0050] 7 shows a flowchart of a power control method according to another exemplary embodiment of the present application. This embodiment is described by taking as an example that the method is performed by a first terminal and a network side device (or a second terminal). The method includes the following steps 701 to 704.

[0051] In step 701, the network side device generates power control setting information.

[0052] The network side equipment may be an access network equipment, for example a base station.

[0053] In one example, when generating resource pool configuration information, the network side device generates power control configuration information corresponding to the resource pool (or a sidelink transmission resource pool, or a D2D resource pool, or a V2X resource pool).

[0054] In one example, when dynamically scheduling sidelink transmission, the network side device generates power control configuration information corresponding to the dynamically scheduled resources (or sidelink transmission resources, or D2D resources, or V2X resources).

[0055] In one example, when semi-statically scheduling sidelink transmission, the network side device generates power control configuration information corresponding to the semi-statically scheduled resources (or sidelink transmission resources, or D2D resources, or V2X resources).

[0056] In one example, when configuring sidelink transmission resources in the manner of a sidelink configuration grant, the network side device generates power control configuration information corresponding to resources of the sidelink configuration grant (or sidelink transmission resources, or D2D resources, or V2X resources).

[0057] In step 702, the network side device transmits power control setting information.

[0058] In one example, the network side device sends broadcast information, the broadcast information includes resource pool setting information, and the resource pool setting information includes power control setting information.

[0059] In one example, the network side device sends a first Radio Resource Control (RRC) dedicated signaling, the first RRC dedicated signaling includes resource pool configuration information, and the resource pool configuration information includes power control configuration information. The RRC dedicated signaling refers to the RRC signaling that the network side device sends to the current terminal specifically, and may be scrambled by using the Cell Radio-Network Temporary Identifier (C-RNTI) of the terminal.

[0060] In one example, a network side device transmits a first Downlink Control Information (DCI), and the first DCI includes power control setting information.

[0061] The first DCI is used to dynamically allocate sidelink transmission resources to the first terminal.

[0062] In one example, the network side device sends a second RRC dedicated signaling, where the second RRC dedicated signaling is used to configure a sidelink configuration grant, and the second RRC dedicated signaling includes power control configuration information.

[0063] For example, the SideLink Configuration Grant is a Type-1 Configuration Grant (Type-1 CG).

[0064] In one example, the network side device sends second RRC dedicated signaling and second DCI, the second RRC dedicated signaling is used to configure a sidelink configuration grant, the second DCI is used to activate or deactivate the sidelink configuration grant, and the second RRC dedicated signaling or the second DCI includes power control configuration information.

[0065] For example, the SideLink Configuration Grant is a Type-2 Configuration Grant (Type-2 CG). The transmission resources configured by the Type-2 CG cannot be used unless they are activated by the second DCI.

[0066] In step 703, the first terminal receives power control setting information.

[0067] In one example, the first terminal receives broadcast information transmitted from a network side device, the broadcast information includes resource pool setting information, and the resource pool setting information includes power control setting information.

[0068] In one example, the first terminal receives a first RRC dedicated signaling transmitted from a network side device, the first RRC dedicated signaling includes resource pool setting information, and the resource pool setting information includes power control setting information.

[0069] In one example, the first terminal receives a first DCI transmitted from a network side device, and the first DCI includes power control setting information.

[0070] In one example, the first terminal receives a second RRC dedicated signaling sent from a network side device, the second RRC dedicated signaling is used to configure a sidelink configuration grant, and the second RRC dedicated signaling includes power control configuration information.

[0071] In one example, the first terminal receives a second RRC dedicated signaling and a second DCI sent from a network side device, the second DCI is used to activate or deactivate a sidelink configuration grant, and the second RRC dedicated signaling or the second DCI includes power control configuration information.

[0072] In step 704, the first terminal determines whether to perform power control when transmitting sidelink data based on the power control setting information.

[0073] Illustratively, the above "power control" includes at least one of the following three forms:

[0074] 1. Based on the power control setting information, determine whether to perform power control based on a sidelink path loss when transmitting sidelink data. 2. Based on the power control setting information, determine whether to perform power control based on a downlink path loss when transmitting sidelink data. 3. Based on the power control setting information, determine whether to perform power control on a PSCCH when transmitting sidelink data.

[0075] In summary, in the method according to the embodiment, by instructing the first terminal that it is not necessary to perform power control by the power control setting information, the terminal using the resource pool (or resource) does not need to perform power control when transmitting sidelink data (i.e., power control based on sidelink path loss is not performed, and power control based on downlink path loss is not performed), and the first terminal can transmit the sidelink data at maximum transmission power. Therefore, all terminals using the same resource pool do not perform power control, and this can avoid the problem that when a terminal using a unicast transmission method performs power control on a certain resource, a terminal using a broadcast transmission method determines that the resource is available when performing sensing, and preempts the resource, resulting in transmission collision.

[0076] In the present application, the power control setting information is further included in the RRC dedicated signaling or DCI, and the power control function can be turned on or off in the scenarios in which the terminal actively selects resources from the resource pool, the semi-static scheduling scenario, the dynamic scheduling scenario, etc. As a result, in the three transmission scenarios, all terminals using the same resource pool do not need to perform power control. As a result, it is possible to avoid the problem that when a terminal using a unicast transmission method performs power control on a certain resource, a terminal using a broadcast transmission method determines that the resource is available when performing sensing, and preempts the resource, resulting in transmission collision.

[0077] The power control setting information may be generated and transmitted by the second terminal.

[0078] The second terminal may be a header terminal of a communication group in which the first terminal is located. A header terminal is a terminal having at least one function of resource management, resource allocation, resource coordination, and group management in a communication group.

[0079] For example, a first terminal, a second terminal and a third terminal form a communication group, the second terminal is a header terminal of the group, and the second terminal can send first setting information to the first terminal to instruct the first terminal whether power control needs to be performed.

[0080] The second terminal may be a counterpart terminal (as opposed to the first terminal) in unicast communication.

[0081] For example, a first terminal and a second terminal perform unicast communication, and the first terminal receives the first setting information transmitted from the second terminal and can determine whether or not power control needs to be performed based on the first setting information.

[0082] Alternatively, the first configuration information may be carried by the PSCCH or sidelink RRC signaling.

[0083] In an alternative embodiment based on FIG. 6 and FIG. 7, step 705 is further included after step 704, as shown in FIG.

[0084] In step 705, if it is determined to perform power control based on the sidelink pathloss, the first terminal determines a size of the sidelink pathloss.

[0085] Schematically, the first terminal determines the size of the sidelink path loss based on the measurement results of the transmission power and the RSRP.

[0086] Regarding the process of determining the transmission power, The first terminal determines a transmission power based on a first transmission power of the PSSCH transmitted from the first terminal. In one example, the first transmission power is a transmission power in each resource element (RE) of the PSSCH transmitted from the first terminal.

[0087] JPEG0007667150000001.jpg129169

[0088] Alternatively, the PSSCH is a PSSCH already transmitted by the first terminal. When the first terminal calculates the sidelink path loss, the first terminal needs to use the transmission power of the PSSCH. Since the PSSCH is a PSSCH already transmitted by the first terminal, the transmission power of the PSSCH can be determined based on the transmission power used by the first terminal when transmitting the PSSCH.

[0089] In another possible implementation form, the first terminal transmits using N antenna ports, and the first transmission power is N times the transmission power of a first antenna port among the N antenna ports, where N is an integer greater than 1. The first antenna port is any one of the N antenna ports, or the first antenna port is a specific one of the N antenna ports.

[0090] Regarding the process of determining the RSRP measurement results, The measurement result of the RSRP is a demodulation reference signal of the physical sidelink shared channel (PSSCH DMRS, Physical SideLink Share Channel Demodulation Reference Signal) and / or a demodulation reference signal of the physical sidelink control channel ( PSCCH DMRS , Physical SideLink Control Channel Demodulation Reference Signal).

[0091] Schematically, the first terminal receives an RSRP measurement result transmitted from the second terminal, and the second terminal measures and obtains the RSRP measurement result based on the PSSCH DMRS or PSCCH DMRS transmitted from the first terminal. The second terminal measures and obtains the RSRP measurement result based on the PSSCH DMRS or PSCCH DMRS transmitted from the first terminal, and then transmits the RSRP measurement result to the first terminal.

[0092] The first terminal may transmit using a single antenna port, or may transmit using multiple antenna ports. When the first terminal transmits using a single antenna port, the RSRP measurement result is the RSRP measurement result of the single antenna port. When the first terminal transmits using M antenna ports, where M is an integer greater than 1, the RSRP measurement result is the sum of the RSRP measurement results of the M antenna ports. For example, when M is 2, the RSRP measurement result is the sum of the RSRP measurement results at two antenna ports.

[0093] In another possible implementation, the first terminal transmits using M antenna ports, and the RSRP measurement result is M times the RSRP measurement result of a first antenna port among the M antenna ports, where M is an integer greater than 1. The first antenna port is any one of the M antenna ports, or the first antenna port is a specific one of the M antenna ports.

[0094] In an alternative embodiment based on FIG. 8, step 705 includes step 7051 and step 7052, as shown in FIG.

[0095] In step 7051, a first filtering process is performed on the transmission power, and a second filtering process is performed on the RSRP measurement result.

[0096] As an option, the second terminal performs RSRP measurement based on the PSSCH DMRS transmitted from the first terminal, and then performs a second filtering process on the RSRP measurement result, and feeds back the filtered RSRP measurement result to the first terminal.

[0097] As an option, the first terminal transmits the PSSCH, performs a first filtering process on the transmission power in the RE carrying the PSSCH DMRS, and calculates a sidelink path loss based on the transmission power after the first filtering process.

[0098] As an option, the first and second filtering steps are performed using the same filtering coefficients.

[0099] In step 7052, the size of the sidelink path loss is determined based on the measurement results of the transmission power and the RSRP.

[0100] In one example, the first terminal calculates the size of the sidelink path loss using the following formula:

[0101] PL SL=referenceSignalPower-higher layer filtered RSRP.

[0102] The referenceSignalPower is obtained based on the transmission power of the PSSCH of each RE of the first terminal. Alternatively, the first filtering coefficient is used to perform upper layer filtering on the transmission opportunity of the PSSCH to obtain the parameter. Schematically, the referenceSignalPower is calculated for each RE of the reference signal. When the first terminal transmits the PSSCH, the power in the RE carrying data and the RE carrying DMRS is the same. Therefore, for a single antenna port, the power in each RE (or the power in each DMRS RE) is calculated to be the referenceSignalPower. Alternatively, the first terminal can determine the transmission power in each RE, i.e., the transmission power in each PSSCH DMRS RE, by dividing the transmission power by the number of REs occupied by the PSSCH channel in each Orthogonal Frequency-Division Multiplexing (OFDM) symbol.

[0103] Higher layer filtered RSRP is RSRP that has undergone higher layer filtering, and the RSRP is obtained by measuring based on PSSCH DMRS or PSCCH DMRS. The parameter is reported to the first terminal by the second terminal that receives the PSCCH / PSSCH transmission. Optionally, the second terminal uses the first filter coefficient to perform higher layer filtering on the RSRP measurement, and reports the filtered RSRP to the first terminal.

[0104] That is, the transmission power and RSRP measurement results are obtained by performing upper layer filtering based on the same filter settings.

[0105] In summary, in the method according to this embodiment, the first terminal determines the size of the sidelink path loss, and performs rational power control when transmitting sidelink data, thereby reducing communication interference and improving communication efficiency.

[0106] In the method according to the embodiment, for each RE, the powers of multiple antenna ports are added to calculate a total power of the RE, and then the sidelink pathloss is calculated based on the total power, thereby improving the accuracy of the sidelink pathloss calculation.

[0107] 10 shows a flowchart of a method for determining transmission resources according to an exemplary embodiment of the present application. This embodiment is described by taking the method as an example performed by a terminal and a network side device. The method includes the following steps 801 to 803.

[0108] In step 801, the network side device transmits a first RSRP threshold value and a second RSRP threshold value to the terminal.

[0109] Optionally, the first RSRP threshold is less than the second RSRP threshold.

[0110] As an option, the network side device transmits the first RSRP threshold and the second RSRP threshold to the terminal via downlink.

[0111] In step 802, the terminal obtains a first RSRP threshold and a second RSRP threshold.

[0112] In step 803, when determining candidate transmission resources for device-to-device (D2D), the terminal uses the first RSRP threshold or the second RSRP threshold to determine whether the transmission resource is a usable candidate transmission resource.

[0113] Alternatively, if the sidelink data transmitted in the candidate transmission resource is a unicast transmission and / or supports power control, the terminal uses a first RSRP threshold to determine whether the transmission resource is a usable candidate transmission resource, otherwise it uses a second RSRP threshold to determine whether the transmission resource is a usable candidate transmission resource.

[0114] For example, in a scenario where sidelink data is unicast transmission or supports power control, when a terminal detects scheduling information in a PSCCH during resource sensing, the terminal measures the PSSCH-RSRP in the transmission resource of the PSSCH scheduled by the scheduling information, and compares the PSSCH-RSRP with a first RSRP threshold. If the measured PSSCH-RSRP is lower than the first RSRP threshold, the transmission resource is deemed to be a usable candidate transmission resource. If the measured PSSCH-RSRP is higher than the first RSRP threshold, the transmission resource is deemed to be unavailable, and the transmission resource is excluded from the candidate transmission resources.

[0115] Also, for example, in a scenario where the sidelink data is multicast transmission, broadcast transmission, or does not support power control, when the terminal detects scheduling information in the PSCCH during resource sensing, it measures the PSSCH-RSRP in the transmission resource of the PSSCH scheduled by the scheduling information, and compares the PSSCH-RSRP with a second RSRP threshold. If the measured PSSCH-RSRP is lower than the second RSRP threshold, the transmission resource is deemed to be a usable candidate transmission resource. If the measured PSSCH-RSRP is higher than the second RSRP threshold, the transmission resource is deemed to be unavailable, and the transmission resource is excluded from the candidate transmission resources.

[0116] Alternatively, the terminal may determine whether the transmission mode adopted by the current sidelink data is unicast, multicast or broadcast according to the indication information included in the PSCCH. Specifically, the present invention may include any one of the following embodiments:

[0117] 1. The indication information included in the sidelink control information (SCI) is used to distinguish the transmission type.

[0118] 2. The purpose identifier information included in the SCI is used to distinguish the transmission type.

[0119] In summary, in the method according to the embodiment, by setting different first and second RSRP thresholds, the terminal can set a lower RSRP threshold for unicast transmission or transmission supporting power control when sensing resources, so that the terminal can avoid preempting transmission resources of unicast transmission and avoid interference with unicast transmission when sensing resources.

[0120] In an alternative embodiment based on Fig. 10, the first RSRP threshold is used when the sidelink data transmitted by the terminal on the candidate transmission resource is for unicast transmission, i.e., if the sidelink data transmitted on the candidate transmission resource is for unicast transmission, the terminal uses the first RSRP threshold to determine whether the transmission resource is an available candidate transmission resource, and if not, the terminal uses the second RSRP threshold to determine whether the transmission resource is an available candidate transmission resource.

[0121] In an alternative embodiment based on Fig. 10, the first RSRP threshold is used if the sidelink data transmitted by the terminal on the candidate transmission resource is power controlled, i.e. if the sidelink data transmitted on the candidate transmission resource is power controlled, the terminal uses the first RSRP threshold to determine whether the transmission resource is a usable candidate transmission resource, otherwise the terminal uses the second RSRP threshold to determine whether the transmission resource is a usable candidate transmission resource.

[0122] In an alternative embodiment based on Fig. 10, the first RSRP threshold is used when the sidelink data transmitted by the terminal on the candidate transmission resource is for unicast transmission and has a priority higher than the priority threshold, i.e. when the sidelink data transmitted on the candidate transmission resource is for unicast transmission and has a priority higher than the priority threshold, the terminal uses the first RSRP threshold to determine whether the transmission resource is an available candidate transmission resource, otherwise the terminal uses the second RSRP threshold to determine whether the transmission resource is an available candidate transmission resource.

[0123] The priority level may be a first priority level included in the sidelink control channel corresponding to the sidelink data or a second priority level corresponding to the sidelink data waiting for transmission. The priority threshold may be set by the network side device or may be pre-set or pre-defined. As will be appreciated, a higher priority level included in the sidelink control channel indicates a lower priority of the corresponding sidelink data, and a lower priority level indicates a higher priority of the corresponding sidelink data.

[0124] In an alternative embodiment based on Fig. 10, the first RSRP threshold is used when the sidelink data transmitted by the terminal on the candidate transmission resource is power controlled and has a priority higher than the priority threshold, i.e. when the sidelink data transmitted on the candidate transmission resource is power controlled and has a priority higher than the priority threshold, the terminal uses the first RSRP threshold to determine whether the transmission resource is an available candidate transmission resource, otherwise the terminal uses the second RSRP threshold to determine whether the transmission resource is an available candidate transmission resource.

[0125] The priority level is a first priority level included in the sidelink control channel corresponding to the sidelink data or a second priority level corresponding to the sidelink data waiting to be transmitted. The priority level threshold may be set by the network side device or may be preset or predefined.

[0126] In the above example, the first RSRP threshold and the second RSRP threshold are each one.

[0127] In another example, the first RSRP threshold is at least two, and each first RSRP threshold corresponds to a different priority pair, i.e., a different priority pair may correspond to a plurality of first RSRP thresholds, and the plurality of first RSRP thresholds may be the same or different. When sensing resources, the first terminal selects a currently used first RSRP threshold from the at least two first RSRP thresholds based on the first priority pair. First RSRP Threshold That is, the first RSRP threshold is determined based on the first priority pair.

[0128] In another example, the second RSRP threshold is at least two, and each second RSRP threshold corresponds to a different priority pair, i.e., a different priority pair may correspond to a plurality of second RSRP thresholds, and the plurality of second RSRP thresholds may be the same or different. When sensing resources, the first terminal selects a currently used second RSRP threshold from the at least two second RSRP thresholds based on the second priority pair. Second RSRP Threshold That is, the second RSRP threshold is determined based on the second priority pair.

[0129] A priority pair (e.g., a first priority pair or a second priority pair) includes a first priority and a second priority, where the first priority is the priority included in the sidelink control channel and the second priority is the priority corresponding to the sidelink data awaiting transmission.

[0130] It should be noted that the steps performed by a single terminal in the above embodiments can be realized simply as a power control method on the terminal side, and the steps performed by a network side device in the above embodiments can be realized simply as a power control method on the network side device.

[0131] FIG. 11 shows a block diagram of a power control device according to one exemplary embodiment of the present application. The device can be implemented as a part of a first terminal. The device comprises: an acquiring module 920 for acquiring power control setting information; and a determination module 940 adapted to determine whether to perform power control when transmitting sidelink data based on the power control configuration information.

[0132] In one alternative embodiment, the acquiring module 920 is used for acquiring the pre-configured power control setting information, or the acquiring module 920 is used for receiving the power control setting information sent from a network side device, or the acquiring module 920 is used for receiving the power control setting information sent from a second terminal.

[0133] In one alternative embodiment, the acquisition module 920 is used for receiving broadcast information sent from the network side device, the broadcast information includes resource pool setting information, and the resource pool setting information includes the power control setting information; or the acquisition module 920 is used for receiving a first radio resource control (RRC) dedicated signaling sent from the network side device, the first RRC dedicated signaling includes resource pool setting information, and the resource pool setting information includes the power control setting information; or the acquisition module 920 is used for receiving a first downlink control information (DCI) sent from the network side device, and the first DCI includes the power control setting information.

[0134] In one alternative embodiment, the acquiring module 920 is used for receiving a second RRC dedicated signaling sent from the network side device, the second RRC dedicated signaling is used for configuring a sidelink configuration grant, and the second RRC dedicated signaling includes the power control configuration information; or the acquiring module 920 is used for receiving the second RRC dedicated signaling and a second DCI sent from the network side device, the second DCI is used for activating or deactivating the sidelink configuration grant, and the second RRC dedicated signaling or the second DCI includes the power control configuration information.

[0135] In one alternative embodiment, the second terminal is a header terminal of a communication group in which the first terminal is located, or the second terminal is a counterpart terminal in a unicast communication.

[0136] In one alternative embodiment, the power control setting information is carried on a sidelink control channel (PSCCH) or sidelink RRC signaling.

[0137] In one alternative embodiment, the determining module 940 is adapted to determine, based on the power control configuration information, whether to perform power control based on a sidelink path loss when transmitting the sidelink data; and / or, the determining module 940 is adapted to determine, based on the power control configuration information, whether to perform power control based on a downlink path loss when transmitting the sidelink data; and / or, the determining module 940 is adapted to determine, based on the power control configuration information, whether to perform power control on a sidelink control channel (PSCCH) when transmitting the sidelink data.

[0138] In one alternative embodiment, the determination module 940 is further used for determining a size of the sidelink pathloss when performing power control based on the sidelink pathloss.

[0139] In one alternative embodiment, the determination module 940 is further used for determining the size of the sidelink path loss based on a measurement result of a transmission power and a reference signal received power (RSRP).

[0140] In one alternative embodiment, the determining module 940 is further used for determining the transmission power based on a first transmission power of a PSSCH transmitted from the device.

[0141] In one alternative embodiment, the first transmission power comprises a transmission power in each resource element of the PSSCH transmitted from the device.

[0142] In one alternative embodiment, the device transmits using a single antenna port, and the first transmit power is a transmit power of the single antenna port.

[0143] In one alternative embodiment, the device transmits using N antenna ports, where N is an integer greater than 1, and the first transmission power is a sum of transmission powers of the N antenna ports, or the first transmission power is N times the transmission power of a first antenna port of the N antenna ports, where the first antenna port is any one of the N antenna ports.

[0144] In one alternative embodiment, the RSRP measurement result is obtained by measuring based on a PSSCH DMRS and / or a PSCCH DMRS transmitted from the first terminal.

[0145] In one alternative embodiment, the acquisition module 920 is further used for receiving the RSRP measurement result sent from the second terminal, and the RSRP measurement result is Second Terminal is measured and obtained based on the PSSCH DMRS or the PSCCH DMRS transmitted from the device.

[0146] In one alternative embodiment, the device transmits using a single antenna port, and the RSRP measurement is an RSRP measurement of the single antenna port.

[0147] In one alternative embodiment, the device transmits using M antenna ports, where M is an integer greater than 1; The RSRP measurement result is the sum of the RSRP measurement results of the M antenna ports, or the RSRP measurement result is M times the RSRP measurement result of a first antenna port of the M antenna ports.

[0148] In one alternative embodiment, the device further comprises: The wireless communication system further comprises a filtering module 960, which is used for performing a first filtering process on the transmission power and a second filtering process on the RSRP measurement result.

[0149] In one alternative embodiment, the filtering module 960 is further adapted to perform the first filtering process and the second filtering process using the same filtering coefficients.

[0150] FIG. 12 shows a block diagram of a power control device according to an exemplary embodiment of the present application. The device may be a network side device or Second Terminal The apparatus may include a generating module 1020 and a transmitting module 1040, The generating module 1020 is used for generating power control setting information, and the power control setting information is used for instructing a first terminal whether to perform power control when transmitting sidelink data; The transmitting module 1040 is used for transmitting the power control setting information.

[0151] In one alternative embodiment, the device is applied to a network side device, The transmitting module 1040 is used for transmitting broadcast information, where the broadcast information includes resource pool configuration information, and the resource pool configuration information includes the power control configuration information; or the transmitting module 1040 is used for transmitting a first radio resource control (RRC) dedicated signaling, where the first RRC dedicated signaling includes resource pool configuration information, and the resource pool configuration information includes the power control configuration information; or the transmitting module 1040 is used for transmitting a first downlink control information (DCI), where the first DCI includes the power control configuration information.

[0152] In one alternative embodiment, the device is applied to a network side device, The transmitting module 1040 is used for transmitting a second RRC dedicated signaling, where the second RRC dedicated signaling is used for configuring a sidelink configuration grant, and the second RRC dedicated signaling includes the power control configuration information, or the transmitting module 1040 is used for transmitting the second RRC dedicated signaling and a second DCI, where the second DCI is used for activating or deactivating the sidelink configuration grant, and the second RRC dedicated signaling or the second DCI includes the power control configuration information.

[0153] In one alternative embodiment, the device comprises Second Terminal wherein the second terminal is a header terminal of a communication group in which the first terminal is located, or the second terminal is a counterpart terminal in unicast communication.

[0154] In one alternative embodiment, the power control setting information is carried on a sidelink control channel (PSCCH) or sidelink RRC signaling.

[0155] In one alternative embodiment, the power control configuration information is used to instruct the first terminal whether to perform power control based on a sidelink path loss when transmitting the sidelink data, and / or the power control configuration information is used to instruct the first terminal whether to perform power control based on a downlink path loss when transmitting the sidelink data, and / or the power control configuration information is used to instruct the first terminal whether to perform power control on a sidelink control channel (PSCCH) when transmitting the sidelink data.

[0156] FIG. 13 shows a block diagram of a transmission resource determination device according to one exemplary embodiment of the present application. The device can be implemented as a part of a first terminal, the device comprising: an obtaining module 1120, used for obtaining a first reference signal received power (RSRP) threshold and a second RSRP threshold; and a processing module 1140 used for determining whether the transmission resource is a usable candidate transmission resource using the first RSRP threshold or the second RSRP threshold when determining candidate transmission resources for D2D.

[0157] In one alternative embodiment, the processing module 1140 is adapted to determine whether the transmission resource is an available candidate transmission resource using the first RSRP threshold if the sidelink data transmitted on the candidate transmission resource is for unicast transmission, and to determine whether the transmission resource is an available candidate transmission resource using the second RSRP threshold if the sidelink data transmitted on the candidate transmission resource is for power controlled transmission, or to determine whether the transmission resource is an available candidate transmission resource using the first RSRP threshold if the sidelink data transmitted on the candidate transmission resource is for power controlled transmission, and to determine whether the transmission resource is an available candidate transmission resource using the second RSRP threshold if the sidelink data transmitted on the candidate transmission resource is for power controlled transmission.

[0158] In one alternative embodiment, the processing module 1140 is adapted to determine whether the transmission resource is an available candidate transmission resource using the first RSRP threshold if the sidelink data transmitted on the candidate transmission resource is a unicast transmission and the priority is higher than the priority threshold, and otherwise determine whether the transmission resource is an available candidate transmission resource using the second RSRP threshold. Alternatively, the processing module 1140 is adapted to determine whether the transmission resource is an available candidate transmission resource using the first RSRP threshold if the sidelink data transmitted on the candidate transmission resource is a power controlled transmission and the priority is higher than the priority threshold, and otherwise determine whether the transmission resource is an available candidate transmission resource using the second RSRP threshold. The priority is a first priority included in a sidelink control channel corresponding to the sidelink data or a second priority corresponding to the sidelink data awaiting transmission.

[0159] In one alternative embodiment, the first RSRP threshold is determined based on a first priority pair, and the second RSRP threshold is determined based on a second priority pair; The first priority pair or the second priority pair includes a first priority and a second priority, the first priority being a priority included in a sidelink control channel and the second priority being a priority corresponding to sidelink data waiting for transmission.

[0160] 14 shows a block diagram of a transmission resource determining device according to an exemplary embodiment of the present application. The device can be implemented as a part of a network side device. The device includes: a sending module 1220; The transmitting module 1220 is used for transmitting a first reference signal received power (RSRP) threshold and a second RSRP threshold to a terminal, and when determining a candidate transmission resource for D2D, the terminal uses the first RSRP threshold or the second RSRP threshold to determine whether the transmission resource is a usable candidate transmission resource.

[0161] In one alternative embodiment, the first RSRP threshold is used if the sidelink data transmitted by the terminal on the candidate transmission resources is of a unicast transmission or the first RSRP threshold is used if the sidelink data transmitted by the terminal on the candidate transmission resources is power controlled.

[0162] In one alternative embodiment, the first RSRP threshold is used if the sidelink data transmitted by the terminal on the candidate transmission resources is a unicast transmission and has a priority higher than a priority threshold, or the first RSRP threshold is used if the sidelink data transmitted by the terminal on the candidate transmission resources is power controlled and has a priority higher than the priority threshold. The priority is a first priority included in a sidelink control channel corresponding to the sidelink data or a second priority corresponding to the sidelink data awaiting transmission.

[0163] In one alternative embodiment, the number of first RSRP thresholds is at least two, each of the first RSRP thresholds corresponding to a different priority pair, and / or the number of second RSRP thresholds is at least two, each of the second RSRP thresholds corresponding to a different priority pair. The priority pair includes a first priority and a second priority, the first priority being a priority included in a sidelink control channel and the second priority being a priority corresponding to sidelink data waiting for transmission.

[0164] 15 shows a structural schematic diagram of a terminal according to an exemplary embodiment of the present application. The terminal includes a processor 1301, a receiver 1302, a transmitter 1303, a memory 1304 and a bus 1305.

[0165] The processor 1301 includes one or more processing cores, and executes various functions and information processing by executing software programs and modules.

[0166] The receiver 1302 and the transmitter 1303 can be implemented as a communication module, which may be a communication chip.

[0167] The memory 1304 is connected to the processor 1301 by a bus 1305 .

[0168] The memory 1304 may be used to store at least one instruction, and the processor 1301 may be used to execute the at least one instruction to implement each step in the above method embodiments.

[0169] Additionally, memory 1304 may be implemented with any type of volatile or non-volatile storage device or combination thereof, including, but not limited to, magnetic or optical disks, Electrically Erasable Programmable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Static Random Access Memory (SRAM), Read Only Memory (ROM), magnetic memory, flash memory, and programmable read only memory (PROM).

[0170] In an exemplary embodiment, a computer-readable storage medium is further provided, the computer-readable storage medium storing at least one instruction, at least one program, code set or instruction set, the at least one instruction, the at least one program, code set or instruction set being loaded and executed by the processor to realize the power control method or the transmission resource determination method executed by the terminal according to the above method embodiments.

[0171] 16 shows a structural schematic diagram of a network side device according to an exemplary embodiment of the present application. The network side device includes: a processor 1401, a receiver 1402, a transmitter 1403, a memory 1404 and a bus 1405.

[0172] The processor 1401 includes one or more processing cores, and executes various functions and information processing by executing software programs and modules.

[0173] The receiver 1402 and the transmitter 1403 can be implemented as a communication module, which may be a communication chip.

[0174] The memory 1404 is connected to the processor 1401 by a bus 1405 .

[0175] The memory 1404 may be used to store at least one instruction, and the processor 1401 may be used to execute the at least one instruction to implement each step in the above method embodiments.

[0176] Additionally, memory 1404 may be implemented with any type of volatile or non-volatile storage device or combination thereof, including, but not limited to, magnetic or optical disks, Electrically Erasable Programmable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Static Random Access Memory (SRAM), Read Only Memory (ROM), magnetic memory, flash memory, and programmable read only memory (PROM).

[0177] An exemplary embodiment further provides a computer-readable storage medium, wherein the computer-readable storage medium stores at least one instruction, at least one program, code set or instruction set, which is loaded and executed by the processor to realize the power control method or the transmission resource determination method executed by the network side device according to the above method embodiments.

[0178] As can be understood by those skilled in the art, all or part of the steps of the above embodiments may be performed by hardware, or may be performed by a program instructing related hardware. The above program may be stored in a computer-readable storage medium, and the above storage medium may be a read-only memory, a magnetic disk, an optical disk, etc.

[0179] The above are only optional embodiments of the present application, and are not intended to limit the present application. As long as the spirit and principle of the present application are met, any modifications, substitutions, improvements, etc., made should be included in the scope of protection of the present application.

Claims

1. 1. A method for power control, the method comprising: A first terminal acquires power control setting information; determining whether to perform power control when transmitting sidelink data by the first terminal based on the power control setting information; determining whether to perform power control when transmitting sidelink data based on the power control configuration information, determining whether to perform power control based on a sidelink path loss when transmitting the sidelink data based on the power control configuration information; When it is determined to perform power control based on the sidelink path loss, the method further comprises: determining a size of the sidelink path loss; The determining a size of the sidelink path loss comprises: determining the size of the sidelink path loss based on a measurement of transmission power and reference signal received power (RSRP); The measurement result of the reference signal received power (RSRP) is obtained by measuring based on a demodulation reference signal of a physical sidelink shared channel (PSSCH DMRS) and / or a demodulation reference signal of a physical sidelink control channel (PSCCH DMRS) transmitted from the first terminal, The first terminal transmits using M antenna ports, where M is an integer greater than 1; the RSRP measurement result is a sum of the RSRP measurement results of the M antenna ports; The method further comprises: A power control method comprising: performing a first filtering process on the transmission power; and performing a second filtering process on the RSRP measurement result; and the first filtering process and the second filtering process are performed using the same filtering coefficient.

2. The obtaining of the power control setting information includes: Obtaining the power control setting information that has been previously set; Or, The method according to claim 1 , further comprising: receiving the power control setting information transmitted from a network side device.

3. Receiving the power control setting information transmitted from the network side device 3. The method according to claim 2, further comprising: receiving a first radio resource control (RRC) dedicated signaling transmitted from the network side device; the first RRC dedicated signaling including resource pool configuration information, and the resource pool configuration information including the power control configuration information.

4. The method further comprises:

2. The method of claim 1, comprising determining the transmit power based on a first transmit power of a Physical Sidelink Shared Channel (PSSCH) transmitted from the first terminal.

5. The method further comprises:

2. The method of claim 1, wherein the first terminal receives the RSRP measurement result transmitted from a second terminal, and the RSRP measurement result is obtained by the second terminal measuring the RSRP measurement result based on the PSSCH DMRS or the PSCCH DMRS transmitted from the first terminal.

6. 1. A method for power control, comprising: generating power control setting information, the power control setting information being used to instruct the first terminal whether to perform power control when transmitting sidelink data; transmitting the power control setting information; the power control setting information is used to instruct the first terminal whether to perform power control based on a sidelink path loss when transmitting the sidelink data; When the first terminal determines to perform power control based on the sidelink path loss, the first terminal determines a size of the sidelink path loss based on a measurement result of a transmission power and a reference signal received power (RSRP); The measurement result of the reference signal received power (RSRP) is obtained by measuring based on a demodulation reference signal of a physical sidelink shared channel (PSSCH DMRS) and / or a demodulation reference signal of a physical sidelink control channel (PSCCH DMRS) transmitted from the first terminal, The first terminal transmits using M antenna ports, where M is an integer greater than 1; the RSRP measurement result is a sum of RSRP measurements of the M antenna ports; and the method further comprises: A power control method comprising: performing a first filtering process on the transmission power; and performing a second filtering process on the RSRP measurement result; and the first filtering process and the second filtering process are performed using the same filtering coefficient.

7. A terminal, characterized in that it is arranged to carry out a power control method according to any one of claims 1 to 5.

8. A network side device, characterized in that it is configured to execute the power control method according to claim 6.

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