Resource selection method and apparatus

Abstract

The application provides a resource selection method and device, relates to the field of communication, and can make the interference on the resource determined by a terminal for data transmission smaller or non-existent, thereby improving transmission reliability. The method comprises the following steps: a first terminal determines a candidate resource set, and the candidate resource set does not include a first resource. Wherein, the interference power on a second resource associated with the first resource is greater than or equal to a first threshold. The periodic extension resource of the second resource and the resource set corresponding to the first resource are overlapped, and the periodic extension resource of the second resource is determined according to the second resource and a first period of a second terminal. The time domain position of the second resource is overlapped with the time domain position of a third resource, and the frequency domain position is not overlapped. The interference power on the second resource is determined according to the power of a signal carried by the third resource and leaked on the second resource; the third resource is a resource in a sensing window, and the signal carried by the third resource is a PSCCH and / or PSSCH of the second terminal.

Description

[0001] This application claims priority to Chinese Patent Application No. 202210001047.4, filed with the State Intellectual Property Office of China on January 4, 2022, entitled “A Sidelink Resource Selection Method and Electronic Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communications, and more particularly to a method and apparatus for resource selection. Background Technology

[0003] In the 3rd generation partnership project (3GPP) sidelink (SL) release (Rel) 16, two resource allocation modes are defined: Mode 1 and Mode 2.

[0004] In Mode 1, the access network equipment (such as a base station) allocates SL resources to the terminal for SL transmission.

[0005] In Mode 2, the transmitting terminal independently selects the SL resources for data transmission through channel sensing and selection. Specifically, the transmitting terminal learns the location of reserved resources of other terminals by listening to the sidelink control information (SCI) sent by other terminals in the sensing window, and then determines the available resources in the selection window.

[0006] Typically, the available resources selected by the sending terminal in the selection window do not overlap with the resources reserved by other terminals. However, transmissions by other terminals on their reserved resources may cause power leakage on the available resources selected by the sending terminal, thereby interfering with the sending terminal's data transmission and reducing the reliability of data transmission. Summary of the Invention

[0007] This application provides a resource selection method and apparatus that enables the terminal to select resources for data transmission with less or no interference, thereby improving transmission reliability.

[0008] Firstly, a resource selection method is provided. This method can be executed by a first terminal, or by a component of the first terminal, such as a processor, chip, or chip system, or by a logic module or software capable of implementing all or part of the functions of the first terminal. The method includes: determining a candidate resource set, which does not include the first resource. The interference power on a second resource associated with the first resource is greater than or equal to a first threshold. The periodically extended resources of the second resource overlap with the resource set corresponding to the first resource, and the periodically extended resources of the second resource are determined based on a first period of the second resource and the second terminal. The temporal location of the second resource overlaps with the temporal location of a third resource, but the frequency domain location of the second resource does not overlap with the frequency domain location of the third resource. The interference power on the second resource is determined based on the power of the signal carried by the third resource leaking onto the second resource. The third resource is a resource within a sensing window, and the signal carried by the third resource is the PSCCH of the second terminal and / or the PSSCH scheduled by that PSCCH.

[0009] Based on this scheme, when the terminal determines the resources for data transmission, since the periodic extension of the second resource is determined based on the first cycle of the second resource and the second terminal, and the time-domain position of the second resource overlaps with the time-domain position of the third resource, the time-domain position of the periodic resource reserved by the second terminal (i.e., the periodic extension of the third resource determined based on the first cycle of the third resource and the second terminal) overlaps with the periodic extension of the second resource. Therefore, interference caused by the PSCCH and / or PSSCH transmitted by the second terminal on the periodic extension of the third resource exists on the periodic extension of the second resource. In this case, if the periodic extension of the second resource overlaps with the first resource or the periodic extension of the first resource, then interference exists on the first resource. In this scenario, the first resource is not included in the candidate resources determined by the first terminal, which avoids the first terminal using the lower-quality first resource or the periodic extension of the first resource for transmission, thereby improving the reliability of data transmission.

[0010] Secondly, a resource selection method is provided. This method can be executed by a first terminal, or by a component of the first terminal, such as a processor, chip, or chip system, or by a logic module or software capable of implementing all or part of the functions of the first terminal. The method includes: determining a candidate resource set, which includes a first resource; and deleting the first resource from the candidate resource set when a target condition is met. The target condition includes: interference power on a second resource being greater than or equal to a first threshold. Wherein, the periodically extended resources of the second resource overlap with the resource set corresponding to the first resource, and the periodically extended resources of the second resource are determined based on the first period of the second resource and the second terminal. The time-domain position of the second resource overlaps with the time-domain position of the third resource, but the frequency-domain position of the second resource does not overlap with the frequency-domain position of the third resource. The interference power on the second resource is determined based on the power of the signal carried by the third resource leaking onto the second resource. The third resource is a resource within a sensing window, and the signal carried by the third resource is the PSCCH of the second terminal and / or the PSSCH scheduled by the PSCCH. The technical effects of the second aspect are similar to those of the first aspect and will not be elaborated further here.

[0011] In conjunction with the first or second aspect, in one possible design, the resource set corresponding to the first resource includes the first resource and / or periodically extended resources of the first resource, the periodically extended resources of the first resource being determined based on the second period of the first resource and the first terminal.

[0012] In conjunction with the first or second aspect, in one possible design, the interference power on the second resource is determined based on the power of signal leakage on the second resource carried by the third resource, including: the interference power on the second resource is determined based on the power of signal leakage on the second resource carried by the third resource, and the signal reception power of the PSCCH and / or PSSCH scheduled by the third terminal carried on the second resource.

[0013] Based on this possible design, since the signal reception power of the PSCCH and / or PSSCH scheduled by the third terminal carried on the second resource is co-channel interference caused by the third terminal to the first terminal, the interference power on the second resource can include non-co-channel interference from the second terminal and co-channel interference from the first terminal. In other words, this application determines the interference on the second resource from both non-co-channel and co-channel perspectives, thereby improving the accuracy of resource selection.

[0014] In conjunction with the first or second aspect, in one possible design, the periodic extension resources of the second resource are determined based on the second resource and the first cycle of the second terminal, including: the periodic extension resources of the second resource are determined based on the second resource, the first cycle of the second terminal, and the third cycle of the third terminal, and the second resource is used to carry the PSCCH and / or PSSCH of the PSCCH scheduling of the third terminal.

[0015] In combination with the first or second aspect, in one possible design, the power of signal leakage carried by the third resource on the second resource is the signal received power on the first channel state information interference measurement (CSI-IM) resource, wherein the first CSI-IM resource is located on the second resource.

[0016] Based on this possible design, the terminal can obtain a more accurate interference power value by measuring the signal reception power on CSI-IM resources, thus avoiding the exclusion of high-quality resources from the candidate resource set.

[0017] In conjunction with the first or second aspect, in one possible design, the method further includes: receiving first configuration information from a third terminal, the first configuration information being used to configure a first CSI-IM resource on a second resource. Alternatively, receiving second configuration information from a network device, the second configuration information being used to configure a periodic CSI-IM resource, the period of which is N time slots, the periodic CSI-IM resource including the first CSI-IM resource, where N is a positive integer.

[0018] In conjunction with the first or second aspect, in one possible design, the CSI-IM resource is located on a symbol other than the protection symbol, and the CSI-IM resource is not used for PSSCH and PSCCH transmission.

[0019] Based on this possible design, CSI-IM resources are not used for PSSCH and PSCCH transmission, so that the power measured on CSI-IM resources is all interference power, thus improving the accuracy of interference power measurement.

[0020] In conjunction with the first or second aspect, in one possible design, the power of signal leakage carried by the third resource onto the second resource is determined based on the signal reception power on the third resource and the in-band radiation template. The signal reception power on the third resource is determined by the signal reception power of the PSCCH of the second terminal and / or the signal reception power of the PSSCH scheduled by the PSCCH.

[0021] Based on this possible design, the interference power on the second resource can be estimated according to the signal received power on the third resource and the in-band radiation template, which can reduce the complexity of obtaining the interference power on the second resource.

[0022] In conjunction with the first or second aspect, in one possible design, the signal reception power on the third resource is the signal reception power of the PSCCH of the second terminal; or, the signal reception power on the third resource is the signal reception power of the PSSCH scheduled by the PSCCH; or, the signal reception power on the third resource is the maximum value between the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH; or, the signal reception power on the third resource is the minimum value between the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH; or, the signal reception power on the third resource is the average value between the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH.

[0023] In conjunction with the first or second aspect, in one possible design, the method further includes: receiving indication information from a fourth terminal, the indication information being used to indicate the interference power on the second resource.

[0024] Based on this possible design, the fourth terminal can assist the first terminal in determining the interference power on the second resource, thereby reducing the implementation complexity and energy consumption of the first terminal.

[0025] In combination with the first or second aspect, in one possible design, the second terminal and the first terminal share the same side link resource pool, and / or the distance between the second terminal and the first terminal is less than or equal to the second threshold.

[0026] In combination with the first or second aspect, in one possible design, the first cycle of the second terminal is the cycle of the resources reserved for the second terminal.

[0027] In conjunction with either the first or second aspect, in one possible design, the second cycle of the first terminal is the cycle for the resources reserved by the first terminal. The second cycle of the first terminal can be configured by higher-level parameters.

[0028] Combining the first or second aspect, in one possible design, the third cycle of the third terminal is the cycle for reserving resources for the third terminal.

[0029] Thirdly, a resource selection method is provided. This method can be executed by a fourth terminal, or by components of the fourth terminal, such as its processor, chip, or chip system, or by a logic module or software capable of implementing all or part of the functions of the first terminal. The method includes: determining the interference power on a second resource and sending indication information to the first terminal, the indication information indicating the interference power on the second resource. Specifically, the time-domain location of the second resource overlaps with the time-domain location of a third resource, but the frequency-domain location of the second resource does not overlap with the frequency-domain location of the third resource; the third resource is a resource within a sensing window; the interference power on the second resource is determined based on the power of the signal carried by the third resource leaking onto the second resource, and the signal carried by the third resource is the physical-side link control channel (PSCCH) and / or the physical-side link sharing channel (PSSCH) scheduled by the PSCCH of the second terminal.

[0030] Based on this scheme, the fourth terminal can determine the interference power on the second resource and indicate the interference power on the second resource to the first terminal, so that the first terminal can select resources according to the interference power on the second resource, avoid the first terminal using resources with poor quality for transmission, and thus improve the reliability of data transmission.

[0031] In one possible design, the interference power on the second resource is determined based on the power of signal leakage on the second resource carried by the third resource, including: the interference power on the second resource is determined based on the power of signal leakage on the second resource carried by the third resource, and the signal reception power of the PSCCH and / or PSSCH scheduled by the third terminal carried on the second resource.

[0032] In one possible design, the power of signal leakage carried by the third resource on the second resource is the signal received power on the first channel state information interference measurement (CSI-IM) resource, wherein the first CSI-IM resource is located on the second resource.

[0033] In one possible design, the method further includes: receiving first configuration information from a third terminal, the first configuration information being used to configure a first CSI-IM resource on a second resource. Alternatively, receiving second configuration information from a network device, the second configuration information being used to configure a periodic CSI-IM resource, the period of which is N time slots, the periodic CSI-IM resource including the first CSI-IM resource, where N is a positive integer.

[0034] In one possible design, CSI-IM resources reside on symbols other than protection symbols, and CSI-IM resources are not used for PSSCH and PSCCH transmissions.

[0035] In one possible design, the power of signal leakage carried by the third resource onto the second resource is determined based on the signal received power on the third resource and the in-band radiation template. The signal received power on the third resource is determined by the signal received power of the PSCCH of the second terminal and / or the signal received power of the PSSCH scheduled by the PSCCH.

[0036] In one possible design, the signal reception power on the third resource is the signal reception power of the PSCCH of the second terminal; or, the signal reception power on the third resource is the signal reception power of the PSSCH scheduled by the PSCCH; or, the signal reception power on the third resource is the maximum value between the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH; or, the signal reception power on the third resource is the minimum value between the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH; or, the signal reception power on the third resource is the average value between the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH.

[0037] Fourthly, a resource configuration method is provided. This method can be executed by a network device, a component of the network device (such as its processor, chip, or chip system), or a logic module or software capable of implementing all or part of the network device's functions. The method includes: generating second configuration information and sending the second configuration information to a first terminal or a fourth terminal. The second configuration information is used to configure periodic CSI-IM resources, where the period of the periodic CSI-IM resources is N time slots, and N is a positive integer.

[0038] In one possible design, CSI-IM resources reside on unprotected symbols and are not used for PSSCH and PSCCH transmissions.

[0039] Fifthly, a resource selection method is provided. This method can be executed by a first terminal, or by a component of the first terminal, such as a processor, chip, or chip system of the first terminal, or by a logic module or software capable of implementing all or part of the functions of the first terminal. The method includes: determining a candidate resource set, which does not include a fourth resource. The signal received power on a fifth resource associated with the fourth resource is greater than or equal to a third threshold. The fifth resource is a resource within a sensing window, and carries the physical side link control channel (PSCCH) and / or the physical side link shared channel (PSSCH) scheduled by the PSCCH of the second terminal. The time-domain positions of the periodically extended resources of the fifth resource and the resource set corresponding to the fourth resource overlap. The periodically extended resources of the fifth resource are determined based on a first period of the fifth resource and the second terminal. The interval between the frequency-domain positions of the fifth resource and the fourth resource is less than the fourth threshold.

[0040] Based on this scheme, when the terminal determines the candidate resource set, if the received power on the fifth resource within the sensing window is relatively large, and the time domain positions of the periodically extended resources of the fifth resource and the resource set corresponding to the fourth resource overlap, then the candidate resource set does not include the fourth resource with a smaller frequency domain interval than the fifth resource. This makes the interference on the resources finally determined by the terminal for data transmission smaller or non-existent, thereby improving the reliability of data transmission.

[0041] Sixthly, a communication device is provided for implementing various methods. This communication device can be a first terminal as described in the first, second, or fifth aspects, or a device containing a first terminal, or a device included in a first terminal, such as a chip; or, the communication device can be a network device as described in the fourth aspect, or a device included in a network device, such as a chip; or, the communication device can be a fourth terminal as described in the third aspect, or a device containing a fourth terminal, or a device included in a fourth terminal, such as a chip. The communication device includes modules, units, or means corresponding to the implementation of the methods, which can be implemented in hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the functions.

[0042] In some possible designs, the communication device may include a processing module. This processing module can be used to implement the processing functions in any of the above aspects and their possible implementations. Furthermore, the communication device may also include a transceiver module. This transceiver module, also referred to as a transceiver unit, is used to implement the sending and / or receiving functions in any of the above aspects and their possible implementations. The transceiver module may consist of transceiver circuitry, a transceiver, a transceiver unit, or a communication interface.

[0043] In some possible designs, the transceiver module includes a sending module and / or a receiving module, which are used to implement the sending or receiving functions in any of the above aspects and any possible implementations.

[0044] A seventh aspect provides a communication device, comprising: a processor and a memory; the memory is configured to store computer instructions, which, when executed by the processor, cause the communication device to perform the method described in any of the aspects. The communication device may be a first terminal as described in the first, second, or fifth aspects, or a device comprising a first terminal, or a device contained within a first terminal, such as a chip; or, the communication device may be a network device as described in the fourth aspect, or a device contained within a network device, such as a chip; or, the communication device may be a fourth terminal as described in the third aspect, or a device comprising a fourth terminal, or a device contained within a fourth terminal, such as a chip.

[0045] Eighthly, a communication device is provided, comprising: a processor and a communication interface; the communication interface being used to communicate with a module outside the communication device; the processor being used to execute a computer program or instructions to cause the communication device to perform the method described in any of the aspects. The communication device may be a first terminal as described in the first, second, or fifth aspects, or a device including a first terminal, or a device included in a first terminal, such as a chip; or, the communication device may be a network device as described in the fourth aspect, or a device included in a network device, such as a chip; or, the communication device may be a fourth terminal as described in the third aspect, or a device including a fourth terminal, or a device included in a fourth terminal, such as a chip.

[0046] A ninth aspect provides a communication device, comprising: at least one processor; the processor being configured to execute a computer program or instructions stored in a memory to cause the communication device to perform the methods described in any of the aspects. The memory may be coupled to the processor, or may be independent of the processor. The communication device may be a first terminal as described in the first, second, or fifth aspects, or a device including a first terminal, or a device included in a first terminal, such as a chip; or, the communication device may be a network device as described in the fourth aspect, or a device included in a network device, such as a chip; or, the communication device may be a fourth terminal as described in the third aspect, or a device including a fourth terminal, or a device included in a fourth terminal, such as a chip.

[0047] In a tenth aspect, a computer-readable storage medium is provided that stores a computer program or instructions that, when executed on a communication device, enable the communication device to perform the method described in any aspect.

[0048] In an eleventh aspect, a computer program product containing instructions is provided, which, when run on a communication device, enables the communication device to perform the method described in any one aspect.

[0049] In a twelfth aspect, a communication device (e.g., a chip or chip system) is provided, the communication device including a processor for implementing the functions involved in any aspect.

[0050] In some possible designs, the communication device includes a memory for storing necessary program instructions and data.

[0051] In some possible designs, when the device is a chip system, it can be composed of chips or contain chips and other discrete components.

[0052] It is understandable that when the communication device provided in any of the sixth to twelfth aspects is a chip, the sending action / function can be understood as outputting information, and the receiving action / function can be understood as inputting information.

[0053] The technical effects of any of the design methods in aspects six through twelfth can be found in the technical effects of different design methods in aspects one through five, and will not be repeated here.

[0054] In a thirteenth aspect, a communication system is provided, the communication system including the first terminal described in the preceding aspect. Attached Figure Description

[0055] Figure 1 A schematic diagram illustrating the symbols occupied by PSCCH and PSSCH in a time slot as provided in this application;

[0056] Figure 2 This application provides a schematic diagram of resource reservation and selection.

[0057] Figure 3 A schematic diagram illustrating adjacent channel interference provided in this application;

[0058] Figure 4 A schematic diagram of the structure of a communication system provided in this application;

[0059] Figure 5 A schematic diagram of the structure of a communication device provided in this application;

[0060] Figure 6 A flowchart illustrating a resource selection method provided in this application;

[0061] Figure 7 A schematic diagram of the distribution of resources provided for this application;

[0062] Figure 8 A schematic diagram showing the distribution of another resource provided for this application;

[0063] Figure 9 A schematic diagram illustrating the distribution of CSI-IM resources provided in this application;

[0064] Figure 10 A flowchart illustrating another resource selection method provided in this application;

[0065] Figure 11 A flowchart illustrating yet another resource selection method provided in this application;

[0066] Figure 12 A schematic diagram of the structure of a first terminal provided in this application;

[0067] Figure 13 A schematic diagram of the structure of a fourth terminal provided in this application;

[0068] Figure 14 A schematic diagram of another communication device provided in this application. Detailed Implementation

[0069] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship. For example, A / B can mean A or B. "And / or" in this application is merely a description of the relationship between the related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be singular or plural.

[0070] In the description of this application, unless otherwise stated, "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, a and b and c, where a, b, and c can be single or multiple.

[0071] Furthermore, to facilitate a clear description of the technical solutions in the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with substantially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0072] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner to facilitate understanding.

[0073] It is understood that the term "embodiment" used throughout the specification means that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, various embodiments throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It is understood that in the various embodiments of this application, the sequence number of each process 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.

[0074] It is understood that some optional features in the embodiments of this application can be implemented independently in certain scenarios without relying on other features, such as the current solution on which they are based, to solve the corresponding technical problems and achieve the corresponding effects. Alternatively, they can be combined with other features as needed in certain scenarios. Correspondingly, the apparatus given in the embodiments of this application can also implement these features or functions, which will not be elaborated here.

[0075] In this application, unless otherwise specified, the same or similar parts between the various embodiments can be referred to each other. In the various embodiments of this application, unless otherwise specified or logically conflicting, the terminology and / or descriptions between different embodiments are consistent and can be mutually referenced. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships. The following descriptions of the embodiments of this application do not constitute a limitation on the scope of protection of this application.

[0076] Sidelink (SL), unlike uplink and downlink, is a new link technology introduced to support direct communication between devices. SL was first introduced in device-to-device (D2D) applications in 3GPP Release 12. Subsequently, Long Term Evolution (LTE) Vehicle-to-Everything (V2X) was developed in 3GPP Release 14 and enhanced in Release 15.

[0077] 3GPP Rel.16 developed the V2X standard based on the fifth-generation (5G) New Radio (NR) interface, and further enhanced it in 3GPP Rel.17. 3GPP Rel.16 primarily targets vehicle-to-everything (V2X) applications, supporting direct communication between vehicles and meeting low-level V2X service requirements. 3GPP Rel.17 enhances the reliability of SL (Signal-Level Communication) and further considers direct communication between power-constrained devices such as handheld terminals, including mobile phones, smartwatches, and fitness trackers.

[0078] 3GPP Rel.16 defines two resource allocation modes for SL: Mode 1 and Mode 2. In Mode 1, a transmitting terminal within the coverage area of ​​a base station requests SL resources for data transmission from the base station via scheduling request signaling. The base station then schedules resources for the transmitting terminal and its corresponding receiving terminal to enable data transmission; alternatively, the base station directly configures SL resources for data transmission for the transmitting terminal via radio resource control (RRC) signaling and / or physical layer signaling.

[0079] In other words, in Mode 1, the base station centrally schedules SL resources, effectively avoiding signal interference and resource overlap issues in SL. However, Mode 1 is heavily reliant on the base station; the terminal must be within network coverage to operate in Mode 1. Furthermore, the sending terminal needs to perform multiple signaling interactions with the base station during the SL resource request process, resulting in a lengthy resource request time. Therefore, Mode 1 is not suitable for some SL scenarios without base stations or SL scenarios with high latency requirements (such as vehicle-to-everything (V2X)).

[0080] In mode 2, the resources used for SL transmission are determined by the transmitting terminal itself through channel awareness and selection. In this mode, the terminal can operate in scenarios without network coverage. Mode 2 supports both dynamic and semi-static allocation schemes. The dynamic scheme selects new resources for each transmission block (TB) and reserves resources for retransmissions of that TB. The semi-static scheme selects and reserves periodic resources for multiple consecutive TBs (e.g., periodic TBs) and their retransmissions. The resource reservation information is in the first (1) level. st The information is indicated in the sidelink control information (SCI) of the -stage.

[0081] In mode 2, when a new TB is generated, or when previously reserved resources under the semi-static allocation scheme are unsuitable for the transmission of the newly generated TB, the higher layers trigger SL resource selection. When SL resource selection is triggered in slot n, the transmitting terminal determines candidate resources within the selection window based on resource reservation information from other terminals sensed within the sensing window, for use in TB transmission. During the mode 2 resource selection process, the higher layers provide the following parameters:

[0082] The newly generated TB has a layer 1 (L1) priority priority. TX ;

[0083] The number L of sub-channels used for this TB transmission within a single time slot subCH ;

[0084] The resource reservation interval for multiple consecutive TB transmissions, i.e., the resource reservation period P. rsvp_TX (Unit: milliseconds ms) When converted to logical time slots, it is denoted as P′. rsvp_TX ;

[0085] Resource Reselection Counter C resel ;

[0086] The available resource reservation interval list sl-ResourceReservePeriodList includes all allowed resource reservation interval values ​​in the resource pool.

[0087] The resource reservation interval and resource reselection counter are parameters in the semi-static allocation scheme. For example, assuming SL resource selection is triggered in time slot n, the specific steps of mode 2 resource allocation are as follows:

[0088] Step 1) Select the window.

[0089] The time slot range for the selection window is [n+T1, n+T2]. T1 is determined by the terminal's capabilities, and T2 is determined by the higher-level parameter sl-SelectionWindowList and the packet delay budget (PDB).

[0090] Step 2) Determine the perception window.

[0091] The time slot range of the perception window is: T0 is determined by the high-level parameter sl-SensingWindow. The subcarrier spacing is determined by the subcarrier spacing used by the SL resource pool.

[0092] Within the perception window, the terminal continuously listens to each time slot in the resource pool and decodes the first order (1) of the physical sidelink control channel (PSCCH) in each time slot. st -stage) sidelink control information (SCI), and measure the reference signal received power (RSRP) of the demodulation reference signal (DMRS) of the PSCCH and / or the physical sidelink shared channel (PSSCH) scheduled by the PSCCH.

[0093] Step 3) Obtain 1 st The priority p indicated in the -stage SCI i =prio RX And the priority p of the terminal's transmission TB configured by the higher level. j =prio TX and determine with p i and p j The relevant RSRP threshold Th(p) i ,p j ).

[0094] Step 4) Determine the initial single-slot candidate resource set S A .

[0095] Among them, the initial single-slot candidate resource set S A This includes all single-slot candidate resources within the selection window in the SL resource pool. A single-slot candidate resource R... x,y Defined as a time slot The continuous L starting from sub-channel x subCH Sub-channels. Initial single-slot candidate resource set S A The total number of candidate resources per time slot in the data is denoted as M. total .

[0096] Step 5) Initialize the single-slot candidate resource set S A A single-slot candidate resource R in x,y (Assuming it is located in a time slot) When both of the following conditions are met, the single-slot candidate resource will be removed from S. A Excluded from:

[0097] a) The terminal is in the time slot No channel eavesdropping was conducted. To sense the time slots within the window.

[0098] b) For any resource reservation interval value P allowed by the high-level parameter sl-ResourceReservePeriodList rsvp time slot and There is overlap. Here, q represents the guaranteed time slot. Positive integers located within the selection window [n+T1, n+T2], 0≤j≤C resel -1.

[0099] It should be noted that in this application, the subscript of a time slot can represent the index of that time slot, for example, The subscript m in the text indicates that the time slot index is m. The subscript in the table indicates that the time slot index is m+q×P rsvp .

[0100] Step 6) Initialize the single-slot candidate resource set S A A single-slot candidate resource R in x,y (Assuming it is located in a time slot) When the following three conditions are met simultaneously, the single-slot candidate resource will be removed from S A Excluded from:

[0101] a) The terminal is in the time slot Decode a PSCCH carrying 1 st -stage SCI, the 1 st The Resource Reservation Period field exists in the -stage SCI, and the value indicated by the Resource Reservation Period field is P. rsvp_RX (in milliseconds), its period converted to time slots is: In addition, the 1 stThe Priority field in the -stage SCI indicates a priority level of prio. RX The subchannel resources occupied by this PSCCH and the PSSCH scheduled by this PSCCH in the frequency domain are R. RX .

[0102] For example, the PSCCH and the PSSCH scheduled by the PSCCH can reside in the same time slot in the time domain. For instance, taking a time slot comprising 14 SL symbols as an example... Figure 1 As shown, PSCCH can occupy a portion of the frequency domain resources of a small number of symbols within the time slot, while PSSCH can occupy all the frequency domain resources of most symbols within the time slot. Here, AGC refers to Automatic Gain Control.

[0103] b) The RSRP of the DMRS of the PSCCH, or the RSRP of the DMRS of the PSSCH scheduled by the PSCCH, is greater than the RSRP threshold Th(prio) RX ,prio TX ).

[0104] c) Time slot Resources R on RX and There is overlap, where q is the guaranteed time slot. A positive integer located within the selection window [n+T1, n+T2]. Time slot. Resources R on RX Periodic resources reserved for other terminals. Represents a single-slot candidate resource R x,y According to the period P′ rsvp_TX Extended resources, 0≤j≤C resel -1.

[0105] It is understandable that step 5) above can be interpreted as the time slot of the terminal within the perception window. When no channel sensing is performed, step 6) can be understood as the time slot of the terminal within the sensing window. Decode a certain PSCCH 1 st The relevant implementation during -stage SCI. That is, for a specific time slot within the perception window. For example, the terminal only needs to execute one of steps 5) and 6). That is, if the terminal is within the time slot of the perception window... If no channel listening is performed, proceed to step 5); if the terminal is in the time slot within the sensing window Decode a certain PSCCH 1 st -stage SCI, execute step 6).

[0106] Step 7) If the initial single-slot candidate resource set S A The number of remaining single-slot candidate resources is less than X·M total , set the threshold Th(prio) RX ,prio TX Increase each RSRP threshold in step 3dB and return to step 4) to continue the process. If S A The number of remaining single-slot candidate resources is greater than X·M total , will S A Report to higher management. X is a number greater than 0 and less than 1 configured by higher management.

[0107] For example, terminal 1 triggers a resource selection process in time slot n. Assume terminal 1 decodes resource 1 within the perception window. st -stage SCI learns about the periodic resources reserved by another terminal, such as Figure 2 As shown ( Figure 2 (Represented by a rectangle filled with diagonal lines). Since the periodic resources reserved by another terminal include resources that overlap with resource A in the selection window, terminal 1 can select resource A in the sensing window from the initial single-slot candidate resource set S. A Excluded from the list.

[0108] It should be noted that, for ease of explanation, the number of sub-channels L is used in the accompanying drawings of this application. subCH Taking 1 as an example, this does not mean that the number of sub-channels L is limited in this application. subCH It must be equal to 1. This application applies to L. subCH The value of is not restricted.

[0109] However, considering the near-far effect and the impact of non-ideal in-band transmission, the PSSCH scheduled by PSCCH may cause power leakage in adjacent sub-channels, thereby severely degrading the quality of adjacent sub-channels.

[0110] For example, such as Figure 3 As shown, assuming the candidate resources for a single time slot represented by the rectangle filled with diagonal lines are resources reserved by terminal 2 as perceived by terminal 1, then the PSCCH and / or PSSCH transmitted on these resources will cause power leakage on sub-channel 2 of the corresponding time slot, i.e. Figure 3 The rectangle filled with horizontal lines indicates a resource where there is power leakage in the PSCCH and / or PSSCH sent by terminal 2.

[0111] According to the current mode 2 resource allocation, there is no PSCCH scheduling PSSCH on sub-channel 2, or terminal 1 fails to correctly decode a certain PSCCH 1 on sub-channel 2 due to interference from terminal 2. stDuring -stage SCI, terminal 1 will not be in the initial single-slot candidate resource set S A The exclusion of single-slot candidate resources on sub-channel 2 results in the terminal reporting single-slot candidate resources with poor channel quality to the higher layers. For example, terminal 1 will not remove resource B within the sensing window from the initial single-slot candidate resource set S. A Excluded from the list.

[0112] Based on this, this application provides a resource selection method that enables the candidate resource set determined by the terminal to include candidate resources of better quality, thereby improving the transmission efficiency of the side link.

[0113] The technical solutions of this application embodiment can be used in various communication systems, such as: vehicle-to-everything (V2X) systems, device-to-device (D2D) systems, machine-to-machine (M2M) systems, Internet of Things (IoT) systems, wireless fidelity (Wi-Fi) systems, Worldwide Interoperability for Microwave Access (WiMAX) systems, and other next-generation communication systems. No limitation is imposed.

[0114] The technical solutions of this application can be applied to various communication scenarios, such as one or more of the following communication scenarios: enhanced mobile broadband (eMBB), ultra-reliable low latency communication (URLLC), machine type communication (MTC), massive machine type communications (mMTC), D2D, V2X, and IoT communication scenarios.

[0115] The communication systems and scenarios applicable to this application mentioned above are merely illustrative examples, and are not limited to these examples. This will be explained uniformly here and will not be repeated below.

[0116] See Figure 4 This application provides a communication system. The communication system includes multiple terminals. These terminals can communicate with each other via a single communication interface (SL).

[0117] Optionally, the terminal in this application embodiment can refer to a device with wireless transceiver capabilities. The terminal can also be called user equipment (UE), terminal equipment, access terminal, user unit, user station, mobile station (MS), remote station, remote terminal, mobile terminal (MT), user terminal, wireless communication equipment, user agent, or user device, etc. For example, the terminal can be a terminal in IoT, V2X, D2D, M2M, 5G networks, or future evolved public land mobile networks (PLMNs). The terminal can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on water (such as on ships); and it can also be deployed in the air (such as on airplanes, balloons, and satellites).

[0118] For example, a terminal can be an IoT device (e.g., a sensor, electricity meter, water meter, etc.), a V2X device, a station (STA) in a wireless local area network (WLAN), a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device (also known as a wearable smart device), a tablet computer or a computer with wireless transceiver capabilities, a virtual reality (VR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical care, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, or a wireless terminal in a smart home. The terminal can be a wireless terminal in the home, an in-vehicle terminal, a vehicle with vehicle-to-vehicle (V2V) communication capability, an intelligent connected vehicle, or a drone with drone-to-UAV (U2U) communication capability, etc. The terminal can be mobile or fixed; this application does not specifically limit its location.

[0119] Optionally, the terminal in the embodiments of this application may also be referred to as a communication device, which may be a general-purpose device or a special-purpose device. The embodiments of this application do not specifically limit it in this regard.

[0120] Optionally, in the embodiments of this application, Figure 4 The terminal in the middle can be accessed through Figure 5 The communication device 50 in the middle is used to achieve this. Figure 5 The diagram shown is a structural schematic of a communication device 50 provided in an embodiment of this application. The communication device 50 includes one or more processors 501, a communication bus 502, and at least one communication interface. Figure 5 (This is merely an example illustration, using a communication interface 504 and a processor 501 as examples. Optionally, a memory 503 may also be included.)

[0121] Processor 501 can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs according to the present application, or a processing core for processing data (e.g., computer program instructions). The processor can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.

[0122] In a specific implementation, as one example, the processor 501 may include one or more CPUs, for example... Figure 5 CPU0 and CPU1 in the CPU.

[0123] In a specific implementation, as one example, the communication device 50 may include multiple processors.

[0124] The communication bus 502 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 5 The bus is represented by only one thick line, but this does not mean that there is only one bus or one type of bus. The communication bus 502 is used to connect different components in the communication device 50, so that the different components can communicate.

[0125] The communication interface 504 can be a transceiver module used to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc. For example, the communication interface 504 can be a transceiver or similar device. Alternatively, the communication interface 504 can also be a transceiver circuit located within the processor 501, used to implement signal input and signal output for the processor.

[0126] Memory 503 can be a device with storage function. For example, it can be read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions; random access memory (RAM) or other types of dynamic storage devices capable of storing information and instructions; electrically erasable programmable read-only memory (EEPROM); compact disc read-only memory (CD-ROM) or other optical disc storage; optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.); magnetic disk storage media or other magnetic storage devices; or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited to these. Memory can exist independently and be connected to the processor via communication bus 502. Memory can also be integrated with the processor.

[0127] The memory 503 stores computer execution instructions for implementing the scheme of this application, and its execution is controlled by the processor 501. The processor 501 executes the computer execution instructions stored in the memory 503 to implement the method provided in the embodiments of this application.

[0128] Alternatively, in this embodiment, the processor 501 may execute the processing-related functions of the method provided in the following embodiments of this application, and the communication interface 504 may be responsible for communicating with other devices or communication networks. This embodiment does not specifically limit this.

[0129] Optionally, the computer execution instructions in the embodiments of this application may also be referred to as application code, and the embodiments of this application do not specifically limit this.

[0130] In a specific implementation, as one embodiment, the communication device 50 may further include an output device 505 and an input device 506. The output device 505 communicates with the processor 501 and can display information in various ways. For example, the output device 505 may be a liquid crystal display (LCD), a light-emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector, etc. The input device 506 communicates with the processor 501 and can receive user input in various ways. For example, the input device 506 may be a mouse, keyboard, touchscreen device, or sensing device, etc.

[0131] It should be noted that, Figure 5 The structural composition shown does not constitute a limitation on the communication device, except... Figure 5 In addition to the components shown, the communication device may include more or fewer components than illustrated, or combine certain components, or have different component arrangements.

[0132] It is understood that in the embodiments of this application, the terminal may execute some or all of the steps in the embodiments of this application. These steps or operations are merely examples, and the embodiments of this application may also execute other operations or variations thereof. Furthermore, the steps may be executed in different orders as presented in the embodiments of this application, and it is not necessarily necessary to execute all the operations in the embodiments of this application.

[0133] See Figure 6 This is a flowchart illustrating a resource selection method provided in an embodiment of this application. This method can be applied to a first terminal, which may be... Figure 4 Any terminal in the communication system shown. For example... Figure 6 As shown, the resource selection method may include the following steps:

[0134] S601, The first terminal determines the candidate resource set.

[0135] Optionally, the candidate resource set may include resources located within the selection window from the SL resource pool. The first terminal can obtain relevant parameters from the higher layer to determine the selection window and the candidate resource set, as explained in steps 2) and 4) above, which will not be repeated here.

[0136] For example, in the embodiments of this application, the smallest time granularity of a resource can be an orthogonal frequency division multiplexing (OFDM) slot, a subframe, or a frame; the smallest frequency granularity of a resource can be a subchannel. For instance, in the embodiments of this application, a resource can be L consecutive subchannels starting from subchannel x within a slot. When the smallest time granularity of a resource is an OFDM slot, the resource in this application can be called a single-slot resource, and the resources in the candidate resource set can be called single-slot candidate resources.

[0137] The candidate resource set does not include the first resource. The interference power on the second resource associated with the first resource is greater than or equal to a first threshold. For example, when the minimum time granularity of the resource is an OFDM slot, the first resource can be called the first single-slot candidate resource.

[0138] In this embodiment, the periodically extended resources of the second resource and the resource set corresponding to the first resource overlap (partially or completely). In some embodiments, the association between the first resource and the second resource can be understood as: the periodically extended resources of the second resource and the resource set corresponding to the first resource overlap.

[0139] In this configuration, the time-domain location of the second resource overlaps with the time-domain location of the third resource, but the frequency-domain location of the second resource does not overlap with the frequency-domain location of the third resource. For example, the frequency-domain locations of the second and third resources are adjacent. Of course, the frequency-domain locations of the second and third resources may not be adjacent, and this application does not impose specific limitations on this.

[0140] The third resource refers to the resource within the perception window. The third resource carries the PSCCH of the second terminal and / or the PSSCH scheduled by that PSCCH. For example, the first terminal can obtain relevant parameters from a higher layer to determine the perception window, as explained in step 1) above, and will not be repeated here.

[0141] In some embodiments, the PSCCH of the second terminal and / or the PSSCH scheduled by the PSCCH carried on the third resource can also be understood as: the PSCCH sent by the second terminal and / or the PSSCH scheduled by the PSCCH carried on the third resource, and the two can be interchanged.

[0142] The interference power on the second resource is determined based on the power of signal leakage from the third resource onto the second resource. In other words, in some embodiments, the interference power on the second resource can be considered to be caused by the PSCCH and / or PSSCH transmitted by the second terminal on the third resource. Therefore, the interference on the second resource can be understood as non-co-channel interference caused by the second terminal to the first terminal.

[0143] Optionally, interference power on the second resource associated with the first resource that is greater than or equal to a first threshold can be used as a target condition. If the candidate resource set initially determined by the first terminal includes the first resource, then when the target condition is met, the first terminal can exclude the first resource from the candidate resource set to obtain a candidate resource set that does not include the first resource.

[0144] Optionally, the power of signal leakage carried by the third resource onto the second resource can be general in-band radiated power, carrier leakage power, or image interference power.

[0145] Optionally, the second terminal may be a terminal that shares the same side link resource pool as the first terminal, and / or the distance between the second terminal and the first terminal may be less than or equal to a second threshold.

[0146] Optionally, the periodic extension of the second resource is determined based on the first cycle of the second resource and the second terminal. The first cycle of the second terminal is the cycle of the reserved resources of the second terminal. The PSCCH of the second terminal carried on the third resource can carry 1 st -stage SCI, the 1 st -stage SCI can indicate the first cycle of the second terminal.

[0147] Optionally, the resource set corresponding to the first resource includes the first resource and / or periodically extended resources of the first resource. The periodically extended resources of the first resource are determined based on the second period of the first resource and the first terminal. For example, the frequency domain position of the periodically extended resources of the first resource overlaps with the frequency domain position of the first resource, and the time domain period is the second period. The second period of the first terminal is the period of the reserved resources of the first terminal, and this second period can be configured by higher-layer parameters.

[0148] For example, suppose the resource set corresponding to the first resource includes the first resource, such as... Figure 7 As shown, the first resource is represented as resource 1, the second resource as resource 2, and the third resource as resource 3. Periodic extensions of the second resource are represented by rectangles filled with horizontal lines. See also... Figure 7 In the periodic extension of the second resource, one resource overlaps with resource 1, and the time-domain positions of resources 2 and 3 overlap, but their frequency-domain positions do not overlap. Figure 7 (The example below uses adjacent frequency domain positions for illustration). Based on this example, when the interference power on resource 2 is greater than or equal to the first threshold, the first terminal will exclude resource 1 from the candidate resource set, that is, resource 1 will not be included in the candidate resource set.

[0149] Understandably, since the periodic extension of the second resource is determined based on the first period of the second resource and the second terminal, and the time-domain position of the second resource overlaps with the time-domain position of the third resource, the time-domain positions of the periodic resources reserved by the second terminal (i.e., the periodic extension of the third resource determined based on the first period of the third resource and the second terminal) and the periodic extension of the second resource overlap. Therefore, interference caused by the PSCCH and / or PSSCH transmitted by the second terminal on the periodic extension of the third resource exists on the periodic extension of the second resource. In this case, if the periodic extension of the second resource overlaps with the first resource or the periodic extension of the first resource, then interference exists on the first resource. In this scenario, the first resource is not included in the candidate resources determined by the first terminal, which avoids the first terminal using the lower quality first resource or the periodic extension of the first resource for transmission.

[0150] For example, see Figure 8 The periodic extension of the third resource is represented by a rectangle filled with diagonal lines. One of the resources in the periodic extension of the third resource (i.e., resource 4) has the same temporal position as resource 1. The transmission of the second terminal on resource 4 will interfere with resource 1. At this time, the quality of resource 1 is poor, and resource 1 can be excluded from the candidate resource set.

[0151] Optionally, the various thresholds in this application (e.g., the first threshold, the second threshold) may be predefined by the protocol, or may be configured by the network device through higher-layer parameters, or may be determined by the first terminal itself. This application does not specifically limit them.

[0152] Optionally, after determining the candidate resource set, the first terminal may perform the following step S602.

[0153] S602. Use resources from the candidate resource set for data transmission.

[0154] Optionally, after determining the candidate resource set, the first terminal may select at least one resource from the candidate resource set and perform data transmission on the at least one resource.

[0155] Based on the scheme provided in this application, when a terminal determines the resources used for data transmission, if it decodes the PSCCH of another terminal on frequency domain resource A in a certain time slot within the perception window, it can obtain the interference power on frequency domain resource B that does not overlap with frequency domain resource A in that time slot. If the interference power on frequency domain resource B is large, the resources with frequency domain position B in the candidate resource set are excluded, so that the interference on the resources finally determined by the terminal for data transmission is small or there is no interference, thereby improving the reliability of data transmission.

[0156] The above describes the overall process of the resource selection method provided in this application. Below, some details of this resource selection method will be described in detail.

[0157] For the periodic extension of the second resource:

[0158] As one possible implementation, the periodic extension resource of the second resource can be determined solely based on the first period of the second resource and the second terminal. For example, the frequency domain position of the periodic extension resource of the second resource overlaps with the frequency domain position of the second resource, and the time domain period is the second period.

[0159] For example, in this possible implementation, if the second period is represented as P′ rsvp_TX The first resource is represented as R. x,y The first period is denoted as P′ rsvp_RX The second resource is represented as R. RX,1 The time slot where the second resource is located is represented as Therefore, the periodic extension of the second resource overlaps with the resource set corresponding to the first resource, which can be represented as: time slots. Resources R on RX,1 and There is overlap. Here, q represents the guaranteed time slot. A positive integer located within the selection window [n+T1, n+T2]. 0 ≤ j ≤ C resel -1.

[0160] As another possible implementation, the periodic extension of the second resource is determined based on the second resource, the first period of the second terminal, and the third period of the third terminal.

[0161] Specifically, the second resource carries the PSCCH of the third terminal and / or the PSSCH scheduled by the PSCCH. In other words, the second resource is used to carry the PSCCH of the third terminal and / or the PSSCH scheduled by the PSCCH, or the third terminal sends its own PSCCH and / or the PSSCH scheduled by the PSCCH on the second resource.

[0162] Optionally, the third cycle of the third terminal is the cycle for the resources reserved by the third terminal. The PSCCH of the third terminal carried on the second resource can carry 1... st -stage SCI, the 1 st -stage SCI can indicate the third cycle of the third terminal.

[0163] Optionally, in this possible implementation, the periodically extended resource of the second resource can be the union of the resource extended from the second resource according to the first period of the second terminal and the resource extended from the second resource according to the third period of the third terminal. Alternatively, the periodically extended resource of the second resource can be the resource extended from the second resource according to the least common multiple of the first and third periods. For example, the frequency domain position of the periodically extended resource of the second resource is the same as that of the second resource, and the time domain period is the least common multiple of the first and third periods.

[0164] For example, in this possible implementation, if the second period is represented as P′ rsvp_TX The first resource is represented as R. x,y The first period is denoted as P′ rsvp_RX The third period is denoted as P′. rsvp_RX,3 The second resource is represented as R. RX,1 The time slot where the second resource is located is represented as Therefore, the periodic extension of the second resource overlaps with the resource set corresponding to the first resource, which can be represented as: time slots. or Resources R on RX,1 and There is overlap. Here, q represents the guaranteed time slot. A positive integer located within the selection window [n+T1, n+T2]. p represents the guaranteed time slot. A positive integer located within the selection window [n+T1, n+T2]. 0 ≤ j ≤ C resel -1.

[0165] Regarding the interference power on the second resource:

[0166] As one possible implementation, the interference power on the second resource is determined solely based on the power of the signal leakage carried by the third resource onto the second resource.

[0167] For example, the interference power on the second resource is equal to the power of the signal carried by the third resource leaking onto the second resource.

[0168] As another possible implementation, the interference power on the second resource is determined based on the power of the signal leakage carried by the third resource onto the second resource, and the signal reception power of the PSCCH and / or the PSSCH scheduled by the third terminal carried on the second resource.

[0169] In other words, interference on the second resource includes not only non-co-channel interference caused by the second terminal to the first terminal, but also co-channel interference caused by the third terminal to the first terminal.

[0170] In some embodiments, the second resource carries the PSCCH of the third terminal and / or the PSSCH scheduled by the PSCCH. This can also be understood as the second resource carrying the PSCCH sent by the third terminal and / or the PSSCH scheduled by the PSCCH. The two can be interchanged.

[0171] Optionally, in this possible implementation, the interference power on the second resource can be the sum of the power of the signal leakage carried by the third resource onto the second resource, and the signal reception power of the PSCCH and / or the PSSCH scheduled by the third terminal carried on the second resource; or it can be the average of the two; or it can be the maximum of the two.

[0172] Optionally, the signal reception power of the third terminal's PSSCH can be the sum of the signal reception powers on multiple physical resource blocks (PRBs) or resource elements (REs) occupied by the PSSCH; or it can be the maximum value of the signal reception power on multiple PRBs or REs occupied by the PSSCH; or it can be the average value of the signal reception power on multiple PRBs or REs occupied by the PSSCH. For details on the signal reception power of the PSSCH, please refer to the description of PSSCH signal reception power, which will not be repeated here.

[0173] Optionally, the interference power on the second resource can be obtained by the first terminal through measurement. Alternatively, it can be obtained by the fourth terminal through measurement and sent to the first terminal.

[0174] Optionally, the fourth terminal can serve as an auxiliary terminal to the first terminal, assisting the first terminal in resource selection. Before the first terminal makes resource selection, the first terminal and the fourth terminal can negotiate through signaling interaction to enable the fourth terminal to act as an auxiliary terminal to the first terminal.

[0175] Optionally, the fourth terminal can perform sensing on various resources within the sensing window. If it senses a PSCCH and / or PSSCH on a certain resource, it can determine the interference power on related resources. For example, assuming the fourth terminal senses the second terminal's PSCCH and / or the PSSCH scheduled by that PSCCH on the third resource within the sensing window, then the fourth terminal can determine the interference power on the second resource. The relationship between the second and third resources can be referred to the explanation in step S601 above, and will not be repeated here.

[0176] Optionally, after determining the interference power on the second resource, the fourth terminal may send indication information to the first terminal, which indicates the interference power on the second resource. Correspondingly, the first terminal receives the indication information from the fourth terminal and determines the interference power on the second resource based on the indication information.

[0177] It should be noted that the method for determining the interference power on the second resource provided in this application is applicable to both the first terminal and the fourth terminal.

[0178] Regarding the power of the signal carried by the third resource leaking onto the second resource:

[0179] As one possible implementation, the signal leakage power carried by the third resource on the second resource is the signal received power on the first channel state information-interference measurement (CSI-IM) resource. The first CSI-IM resource is located on the second resource.

[0180] It is understandable that the signal leakage power carried by the third resource on the second resource is the signal reception power on the first CSI-IM resource, which is interference power for the first terminal.

[0181] Optionally, CSI-IM resources can reside on symbols other than the guard symbol. For example, such as... Figure 9 As shown, the CSI-IM resource can be located on the last symbol before the protection symbol. The symbols in this application can represent time lengths, such as OFDM symbols, and are not limited thereto.

[0182] Optionally, CSI-IM resources are not used for PSSCH and PSCCH transmissions; that is, PSSCH and PSCCH transmitted by the terminal do not occupy CSI-IM resources. The terminal can measure interference from other terminals on CSI-IM resources.

[0183] In some embodiments, the first CSI-IM resource may be configured by a third terminal. For example, the third terminal may send first configuration information for configuring the first CSI-IM resource on the second resource. This first configuration information may be carried in the third terminal's 1 st In the -stage SCI, this first configuration information can indicate the time-domain and frequency-domain location of the first CSI-IM resource.

[0184] Optionally, when the interference power on the second resource is determined by the fourth terminal, the fourth terminal may receive the first configuration information sent by the third terminal.

[0185] In other embodiments, CSI-IM resources may be configured by network devices. For example, such as... Figure 10 As shown, prior to step S602, the resource selection method provided in this application may further include the following steps:

[0186] The network device sends second configuration information to the first terminal, and the first terminal receives the second configuration information from the network device. This second configuration information is used to configure periodic CSI-IM resources, which include the first CSI-IM resources. The period of the periodic CSI-IM resources configured by the network device can be N time slots, where N is a positive integer. That is, the network device can periodically configure CSI-IM resources in the time domain.

[0187] Optionally, for the frequency domain location of CSI-IM resources, the network device can configure certain REs in each sub-channel as CSI-IM resources. In this case, the second configuration information may include the starting position of the REs used as CSI-IM resources in the frequency domain and the number of REs.

[0188] Alternatively, the network device can configure the frequency domain location of CSI-IM resources in a period of M sub-channels. For example, with M equal to 2, the network device can configure some REs on sub-channels with indices 0, 2, 4, 6, 8, etc., as CSI-IM resources. In this case, the second configuration information can include the starting position of the REs used as CSI-IM resources in the frequency domain, the number of REs, and the period M.

[0189] Optionally, the network device can be a device that connects the terminal to the wireless network, such as various types of base stations, transmission reception points (TRPs), etc. This application does not specifically limit the form of the network device.

[0190] Optionally, when the interference power on the second resource is determined by the fourth terminal, the network device may send the second configuration information to the fourth terminal, and the fourth terminal receives the second configuration information from the network device.

[0191] In some other embodiments, the time-frequency location of the CSI-IM resource may also be specified by the protocol, and this application does not specifically limit it. Optionally, the signal received power on the first CSI-IM resource may be the average received power on the plurality of REs included in the first CSI-IM resource, or it may be the maximum received power on the plurality of REs included in the first CSI-IM resource.

[0192] Optionally, the signal received power on the first CSI-IM resource can be obtained by the first terminal through measurement. Alternatively, it can be obtained by the fourth terminal through measurement and transmitted to the first terminal.

[0193] As another possible implementation, the power of signal leakage from the third resource to the second resource is determined based on the signal reception power of the first CSI-IM resource and the signal reception power of the second resource other than the first CSI-IM resource (denoted as non-CSI-IM resource). The first CSI-IM resource can be referred to the relevant description above, and will not be repeated here.

[0194] Optionally, the power of signal leakage carried by the third resource onto the second resource can be the maximum or average of the signal reception power on the first CSI-IM resource of the second resource and the signal reception power on the non-CSI-IM resource of the second resource.

[0195] Optionally, the signal reception power on the non-CSI-IM resources of the second resource can be the average signal reception power on the multiple REs included in the non-CSI-IM resource, or it can be the maximum signal reception power on the multiple REs.

[0196] Based on this scheme, accurate interference power values ​​can be obtained through measurement, preventing the terminal from excluding high-quality resources from the candidate resource set.

[0197] As another possible implementation, the power of signal leakage from the third resource onto the second resource is determined based on the signal received power on the third resource and the in-band emission (IBE) template. For example, the first terminal can input the signal received power on the third resource into the IBE template to obtain the power of signal leakage from the third resource onto the second resource.

[0198] Optionally, the in-band radiation template can describe the ratio of the average output power on a PRB within the transmission bandwidth occupied by the terminal to the average output power on a PRB outside the transmission bandwidth. In some examples, the in-band radiation template can be pre-configured; for example, the in-band radiation template can be predetermined by the network device and sent to the first or fourth terminal, such as through Layer 1 or Layer 3 signaling. In other examples, the first or fourth terminal can obtain the in-band radiation template pre-configured at a second terminal; for example, the first or fourth terminal requests the second terminal to send the in-band radiation template.

[0199] Optionally, the signal reception power on the third resource can be determined by the signal reception power of the PSCCH of the second terminal carried on the third resource, and / or the signal reception power of the PSSCH scheduled by the PSCCH. For example: the signal reception power on the third resource is the signal reception power of the PSCCH of the second terminal;

[0200] Alternatively, the signal reception power on the third resource is the signal reception power of the PSSCH scheduled by the PSCCH.

[0201] Alternatively, the signal reception power on the third resource is the maximum value between the signal reception power of the second terminal's PSCCH and the signal reception power of the PSSCH scheduled by the PSCCH.

[0202] Alternatively, the signal reception power on the third resource is the minimum of the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH.

[0203] Alternatively, the signal reception power on the third resource is the average of the signal reception power of the second terminal's PSCCH and the signal reception power of the PSSCH scheduled by the PSCCH.

[0204] Based on this possible implementation, the first terminal can estimate the interference power on the second resource according to the signal reception power on the third resource and the in-band radiation template, thereby reducing the implementation complexity.

[0205] Based on the above scheme, taking the time domain period of the periodic extension of the second resource as the first period, the interference power on the second resource equal to the signal leakage power carried by the third resource on the second resource, and the signal leakage power carried by the third resource on the second resource being equal to the signal reception power on the first CSI-IM resource, this application also provides a specific step for mode 2 resource selection. Assuming that the SL resource triggers mode 2 resource selection in time slot n, the resource selection steps are as follows:

[0206] Step 1) Select the window.

[0207] Step 2) Determine the perception window.

[0208] Step 3) Obtain 1 st The priority p indicated in the -stage SCI i =prio RX And the priority p of the terminal's transmission TB configured by the higher level. j =prio TX and determine with p i and p j The relevant RSRP threshold Th(p) i ,p j ).

[0209] Step 4) Determine the initial single-slot candidate resource set S A .

[0210] Step 5) Initialize the single-slot candidate resource set S A A single-slot candidate resource R inxy (Assuming it is located in a time slot) When both of the following conditions are met, the single-slot candidate resource will be removed from S. A Excluded from:

[0211] a) The terminal is in the time slot No channel eavesdropping was conducted. To sense the time slots within the window.

[0212] b) For any resource reservation interval value P allowed by the high-level parameter sl-ResourceReservePeriodList rsvp time slot and There is overlap. Here, q represents the guaranteed time slot. Positive integers located within the selection window [n+T1, n+T2], 0≤j≤C resel -1.

[0213] It should be noted that in this application, the subscript of a time slot can represent the index of that time slot, for example, The subscript m in the text indicates that the time slot index is m. The subscript in the table indicates that the time slot index is m+q×P rsvp .

[0214] Step 6) Initialize the single-slot candidate resource set S A A single-slot candidate resource R in x,y (Assuming it is located in a time slot) When the following three conditions are met simultaneously, the single-slot candidate resource will be removed from S A Excluded from:

[0215] a) The terminal is in the time slot Decode a PSCCH carrying 1 st -stage SCI, the 1 st The Resource Reservation Period field exists in the -stage SCI, and the value indicated by the Resource Reservation Period field is P. rsvp_RX (In milliseconds), its period converted to time slots is P′. rsvp_RX Furthermore, the 1 st The Priority field in the -stage SCI indicates a priority level of prio. RX The subchannel resources occupied by this PSCCH and the PSSCH scheduled by this PSCCH in the frequency domain are R. RX .

[0216] b) The RSRP of the DMRS of the PSCCH, or the RSRP of the DMRS of the PSSCH scheduled by the PSCCH, is greater than the RSRP threshold Th(prio) RX ,prio TX ).

[0217] c) Time slot Resources R on RX and There is overlap, where q is the guaranteed time slot. A positive integer located within the selection window [n+T1, n+T2]. Time slot. Resources R on RX Periodic resources reserved for other terminals. Represents a single-slot candidate resource R x,y According to the period P′ rsvp_TX Extended resources, 0≤j≤C resel -1.

[0218] Step 6a) Initialize the single-slot candidate resource set S A A single-slot candidate resource R in x,y (Assuming it is located in a time slot) When the following three conditions are met simultaneously, the single-slot candidate resource will be removed from S A Excluded from:

[0219] a) The terminal in time slots including CSI-IM resources Decode 1 carried by a certain PSCCH st -stage SCI, the 1 st The Resource Reservation Period field exists in the -stage SCI, and the value indicated by the Resource Reservation Period field is P. rsvp_RX (In milliseconds), its period converted to time slots is P′. rsvp_RX (i.e., the first cycle). The sub-channel resources occupied by this PSCCH and the PSSCH scheduled by this PSCCH in the frequency domain are R. RX .

[0220] b) Frequency domain relation with R RX Non-overlapping sub-channel resources R RX,1 The signal received power on the CSI-IM resource (i.e., the first CSI-IM resource) is greater than or equal to the first threshold.

[0221] c) Time slot Sub-channel resources R RX,1 and There is overlap. Here, q represents the guaranteed time slot. A positive integer located within the selection window [n+T1, n+T2]. 0 ≤ j ≤ C resel -1.

[0222] Step 7) If the initial single-slot candidate resource set S A The number of remaining single-slot candidate resources is less than X·M total , set the threshold Th(prio) RX ,prio TX Increase each RSRP threshold in step 3dB and return to step 4) to continue the process. If S A The number of remaining single-slot candidate resources is greater than X·M total , will S A Report to higher management. X is a number greater than 0 and less than 1 configured by higher management.

[0223] Steps 1) through 6) and 7) are detailed in the foregoing descriptions and will not be repeated here. In other words, the mode 2 resource selection steps provided in this application include an additional step 6a compared to existing steps.

[0224] The relationship between steps 5) and 6) can be found in the foregoing explanation and will not be repeated here. For steps 6) and 6a), the terminal can execute step 6) first, and if the three conditions in step 6) are not simultaneously met, then execute step 6a); or, the terminal can execute step 6a) first, and if the three conditions in step 6a) are not simultaneously met, then execute step 6). This application does not specifically limit the execution order of steps 6) and 6a). Based on the above scheme, taking the time-domain period of the periodic extension of the second resource as the first period, and the power of the signal leakage carried by the third resource onto the second resource determined by the signal reception power on the third resource and the in-band radiation template as an example, this application also provides a specific step for mode 2 resource selection. Assuming that the SL resource triggers mode 2 resource selection in time slot n, the resource selection steps are as follows:

[0225] Step 1) Select the window.

[0226] Step 2) Determine the perception window.

[0227] Step 3) Obtain 1 st The priority p indicated in the -stage SCI i =prio RX And the priority p of the terminal's transmission TB configured by the higher level. j =prio TX and determine with p i and p j The relevant RSRP threshold Th(p) i ,p j ).

[0228] Step 4) Determine the initial single-slot candidate resource set S A .

[0229] Step 5) Initialize the single-slot candidate resource set S A A single-slot candidate resource R in x,y (Assuming it is located in a time slot) When both of the following conditions are met, the single-slot candidate resource will be removed from S. A Excluded from:

[0230] a) The terminal is in the time slot No channel eavesdropping was conducted. To sense the time slots within the window.

[0231] b) For any resource reservation interval value P allowed by the high-level parameter sl-ResourceReservePeriodList rsvp time slot and There is overlap. Here, q represents the guaranteed time slot. Positive integers located within the selection window [n+T1, n+T2], 0≤j≤C resel -1.

[0232] It should be noted that in this application, the subscript of a time slot can represent the index of that time slot, for example, The subscript m in the text indicates that the time slot index is m. The subscript in the table indicates that the time slot index is m+q×P rsvp .

[0233] Step 6) Initialize the single-slot candidate resource set S A A single-slot candidate resource R in x,y (Assuming it is located in a time slot) When the following three conditions are met simultaneously, the single-slot candidate resource will be removed from S A Excluded from:

[0234] a) The terminal is in the time slot Decode a PSCCH carrying 1 st -stage SCI, the 1 st The Resource Reservation Period field exists in the -stage SCI, and the value indicated by the Resource Reservation Period field is P. rsvp_RX (In milliseconds), its period converted to time slots is P′. rsvp_RX Furthermore, the 1 stThe Priority field in the -stage SCI indicates a priority level of prio. RX The subchannel resources occupied by this PSCCH and the PSSCH scheduled by this PSCCH in the frequency domain are R. RX .

[0235] b) The RSRP of the DMRS of the PSCCH, or the RSRP of the DMRS of the PSSCH scheduled by the PSCCH, is greater than the RSRP threshold Th(prio) RX ,prio TX ).

[0236] c) Time slot Resources R on RX and There is overlap, where q is the guaranteed time slot. A positive integer located within the selection window [n+T1, n+T2]. Time slot. Resources R on RX Periodic resources reserved for other terminals. Represents a single-slot candidate resource R x,y According to the period P′ rsvp_TX Extended resources, 0≤j≤C resel -1.

[0237] Step 6b) Initialize the single-slot candidate resource set S A A single-slot candidate resource R in x,y (Assuming it is located in a time slot) When the following three conditions are met simultaneously, the single-slot candidate resource will be removed from S A Excluded from:

[0238] a) The terminal is in the time slot Decode 1 carried by a certain PSCCH st -stage SCI, the 1 st The Resource Reservation Period field exists in the -stage SCI, and the value indicated by the Resource Reservation Period field is P. rsvp_RX (In milliseconds), its period converted to time slots is P′. rsvp_RX (i.e., the first cycle). The sub-channel resources occupied by this PSCCH and the PSSCH scheduled by this PSCCH in the frequency domain are R. RX .

[0239] b) The terminal determines the signal received power of the PSCCH and / or the PSSCH scheduled by the PSCCH, and determines the frequency domain relative to R based on the in-band radiation template. RX Non-overlapping sub-channel resources RRX,1 The interference power is greater than or equal to the first threshold.

[0240] c) Time slot Sub-channel resources R RX,1 and There is overlap. Here, q represents the guaranteed time slot. A positive integer located within the selection window [n+T1, n+T2]. 0 ≤ j ≤ C resel -1.

[0241] Step 7) If the initial single-slot candidate resource set S A The number of remaining single-slot candidate resources is less than X·M total , set the threshold Th(prio) RX ,prio TX Increase each RSRP threshold in step 3dB and return to step 4) to continue the process. If S A The number of remaining single-slot candidate resources is greater than X·M total , will S A Report to higher management. X is a number greater than 0 and less than 1 configured by higher management.

[0242] Steps 1) through 6) and 7) are detailed in the foregoing descriptions and will not be repeated here. In other words, the mode 2 resource selection step provided in this application adds step 6b compared to existing steps.

[0243] The relationship between steps 5) and 6) can be found in the foregoing description and will not be repeated here. For steps 6) and 6b), the terminal may execute step 6) first, and if the three conditions in step 6) are not met simultaneously, then execute step 6b); or, the terminal may execute step 6b) first, and if the three conditions in step 6b) are not met simultaneously, then execute step 6). This application does not specify the execution order of steps 6) and 6b).

[0244] Apart from Figure 6 In addition to the resource selection method shown, this application also provides another resource selection method, such as... Figure 11 As shown, the method includes the following steps:

[0245] S1101, The first terminal determines the candidate resource set.

[0246] Optionally, the candidate resource set may include resources located within the selection window from the SL resource pool. Refer to the relevant explanations in steps 2) and 4) above; they will not be repeated here.

[0247] The candidate resource set does not include the fourth resource. The signal received power on the fifth resource associated with the fourth resource is greater than or equal to the third threshold.

[0248] The fifth resource is the resource within the sensing window, and it carries the PSCCH of the second terminal and / or the PSSCH scheduled by the PSCCH. The received power on the fifth resource is the received power of the PSCCH of the second terminal and / or the PSSCH scheduled by the PSCCH.

[0249] Among them, the time-domain positions of the periodically extended resources of the fifth resource and the resource sets corresponding to the fourth resource overlap. The interval between the frequency-domain positions of the fifth resource and the fourth resource is less than the fourth threshold.

[0250] The periodic extension of the fifth resource is determined based on the first period of the fifth resource and the second terminal. For example, the frequency domain position of the periodic extension of the fifth resource overlaps with the frequency domain position of the fifth resource, and the time domain period is the first period.

[0251] Optionally, the first cycle of the second terminal is the cycle for reserving resources on the second terminal. The PSCCH of the second terminal carried on the fifth resource can carry 1... st -stage SCI, the 1 st -stage SCI can indicate the first cycle of the second terminal.

[0252] Optionally, the resource set corresponding to the fourth resource includes the fourth resource and / or periodically extended resources of the fourth resource, wherein the periodically extended resources of the fourth resource are determined based on the second period of the fourth resource and the first terminal. For example, the frequency domain position of the periodically extended resources of the fourth resource overlaps with the frequency domain position of the fourth resource, and the time domain period is the second period. The second period of the first terminal is the period of the reserved resources of the first terminal, and this second period can be configured by higher-layer parameters.

[0253] Optionally, the third threshold can be related to both the first and second priorities. The first priority is the 1 carried in the PSCCH of the second terminal on the fifth resource. st -Stage SCI indicates the priority. The second priority is the priority of the TB to be transmitted by the first terminal, and the second priority can be configured by higher layers.

[0254] Optionally, the interval between the frequency domain position of the fifth resource and the frequency domain position of the fourth resource can be represented in units of REs, or in units of sub-channels. This application does not specifically limit this.

[0255] Optionally, after determining the candidate resource set, the first terminal may perform the following step S1102.

[0256] S1102. Use resources from the candidate resource set for data transmission. Refer to the relevant explanation in step S602 above; it will not be repeated here.

[0257] Understandably, in practical applications, the first terminal can be combined with... Figure 11 The method shown is used to select resources in accordance with the existing mode 2 resource selection method.

[0258] Based on the scheme provided in this application, when the terminal determines the candidate resource set, if the received power on the fifth resource within the sensing window is relatively large, and the time domain positions of the periodically extended resources of the fifth resource and the resource set corresponding to the fourth resource overlap, then the candidate resource set does not include the fourth resource with a smaller frequency domain interval than the fifth resource. This makes the interference on the resources finally determined by the terminal for data transmission smaller or non-existent, thereby improving the reliability of data transmission.

[0259] It should be noted that the signal received power in this application can be expressed in various forms, such as RSRP, received signal strength indication (RSSI), etc., and there is no limitation.

[0260] It is understood that, in the above embodiments, the methods and / or steps implemented by the network device can also be implemented by components (e.g., processors, chips, chip systems, circuits, logic modules, or software such as chips or circuits) that can be used in the network device; and the methods and / or steps implemented by the terminal can also be implemented by components (e.g., processors, chips, chip systems, circuits, logic modules, or software such as chips or circuits) that can be used in the terminal.

[0261] The foregoing mainly describes the solutions provided in this application. Accordingly, this application also provides a communication device for implementing the various methods described above. This communication device can be a first terminal in the above method embodiments, or a device including the aforementioned first terminal, or a component usable in the first terminal, such as a chip or chip system.

[0262] It is understood that, in order to achieve the aforementioned functions, the communication device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0263] This application embodiment can divide the communication device into functional modules according to the above method embodiment. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0264] Optionally, taking the communication device as the first terminal in the above method embodiment as an example, Figure 12 A schematic diagram of the structure of a first terminal 120 is shown. The first terminal 120 includes a processing module 1201. Optionally, the first terminal may also include a transceiver module 1202.

[0265] In some embodiments, the first terminal 120 may further include a storage module. Figure 12 (Not shown in the image) is used to store program instructions and data.

[0266] In some embodiments, the transceiver module 1202, also referred to as a transceiver unit, is used to implement sending and / or receiving functions. The transceiver module 1202 may consist of a transceiver circuit, a transceiver, a transceiver unit, or a communication interface.

[0267] In some embodiments, the transceiver module 1202 may include a receiving module and a sending module, respectively used to perform the receiving and sending steps performed by the first terminal in the above method embodiments, and / or other processes used to support the technology described herein; the processing module 1201 may be used to perform the processing steps (e.g., determining, excluding, etc.) performed by the first terminal in the above method embodiments, and / or other processes used to support the technology described herein.

[0268] The processing module 1201 is used to determine a candidate resource set, which does not include the first resource. The interference power on the second resource associated with the first resource is greater than or equal to a first threshold. The periodically extended resources of the second resource overlap with the resource set corresponding to the first resource; the periodically extended resources of the second resource are determined based on the first period of the second resource and the second terminal. The temporal location of the second resource overlaps with the temporal location of the third resource, but the frequency domain location of the second resource does not overlap with the frequency domain location of the third resource. The interference power on the second resource is determined based on the power of the signal carried by the third resource leaking onto the second resource. The third resource is a resource within the sensing window, and the signal carried by the third resource is the PSCCH of the second terminal and / or the PSSCH scheduled by the PSCCH.

[0269] Optionally, the resource set corresponding to the first resource includes the first resource and / or the periodically extended resources of the first resource, wherein the periodically extended resources of the first resource are determined based on the second period of the first resource and the first terminal.

[0270] Optionally, the interference power on the second resource is determined based on the power of signal leakage on the second resource carried by the third resource, including: the interference power on the second resource is determined based on the power of signal leakage on the second resource carried by the third resource, and the signal reception power of the PSCCH and / or PSSCH scheduled by the third terminal carried on the second resource.

[0271] Optionally, the periodic extension of the second resource is determined based on the second resource and the first period of the second terminal, including: the periodic extension of the second resource is determined based on the second resource, the first period of the second terminal, and the third period of the third terminal, and the second resource is used to carry the PSCCH and / or PSSCH of the third terminal.

[0272] Optionally, the power of signal leakage carried by the third resource on the second resource is the signal received power on the first channel state information interference measurement (CSI-IM) resource, wherein the first CSI-IM resource is located on the second resource.

[0273] Optionally, the transceiver module 1202 is used to receive first configuration information from a third terminal, the first configuration information being used to configure a first CSI-IM resource on a second resource; or, the transceiver module 1202 is used to receive second configuration information from a network device, the second configuration information being used to configure a periodic CSI-IM resource, the period of the periodic CSI-IM resource being N time slots, the periodic CSI-IM resource including the first CSI-IM resource, where N is a positive integer.

[0274] Optionally, CSI-IM resources are located on symbols other than protection symbols, and CSI-IM resources are not used for PSSCH and PSCCH transmissions.

[0275] Optionally, the power of signal leakage carried by the third resource onto the second resource is determined based on the signal reception power on the third resource and the in-band radiation template. The signal reception power on the third resource is determined by the signal reception power of the PSCCH of the second terminal and / or the signal reception power of the PSSCH scheduled by the PSCCH.

[0276] Optionally, the signal reception power on the third resource is the signal reception power of the PSCCH of the second terminal; or, the signal reception power on the third resource is the signal reception power of the PSSCH scheduled by the PSCCH; or, the signal reception power on the third resource is the maximum value between the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH; or, the signal reception power on the third resource is the minimum value between the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH; or, the signal reception power on the third resource is the average value between the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH.

[0277] Optionally, the transceiver module 1202 is also configured to receive indication information from a fourth terminal, the indication information being used to indicate the interference power on the second resource.

[0278] Optionally, the transceiver module 1202 is also used to transmit data using resources from the candidate resource set.

[0279] Optionally, the second terminal and the first terminal share the same side link resource pool, and / or the distance between the second terminal and the first terminal is less than or equal to a second threshold.

[0280] All relevant content of each step involved in the above method embodiments can be referenced from the functional description of the corresponding functional module, and will not be repeated here.

[0281] In this application, the first terminal 120 is presented in an integrated manner, divided into various functional modules. Here, "module" may refer to an application-specific integrated circuit (ASIC), a circuit, a processor and memory that executes one or more software or firmware programs, integrated logic circuits, and / or other devices that can provide the above functions.

[0282] In some embodiments, those skilled in the art will recognize that the first terminal 120 can be implemented using hardware methods. Figure 5 The communication device 50 shown is in the form of [example device].

[0283] As an example, Figure 12 The function / implementation process of the processing module 1201 can be achieved through... Figure 5 The processor 501 in the communication device 50 shown calls computer execution instructions stored in the memory 503 to implement the communication. Figure 12 The function / implementation process of the transceiver module 1202 can be obtained through Figure 5 This is achieved through the communication interface 504 in the communication device 50 shown.

[0284] In some embodiments, when Figure 12 When the first terminal 120 is a chip or chip system, the function / implementation process of the transceiver module 1202 can be implemented through the input / output interface (or communication interface) of the chip or chip system, and the function / implementation process of the processing module 1201 can be implemented through the processor (or processing circuit) of the chip or chip system.

[0285] Since the first terminal 120 provided in this embodiment can execute the above method, the technical effects it can achieve can be referred to the above method embodiment, and will not be repeated here.

[0286] Optionally, taking the communication device as the fourth terminal in the above method embodiments as an example, Figure 13 A schematic diagram of a fourth terminal 130 is shown. The fourth terminal 130 includes a processing module 1301. Optionally, the fourth terminal may also include a transceiver module 1302.

[0287] In some embodiments, the fourth terminal 130 may further include a storage module. Figure 13 (Not shown in the image) is used to store program instructions and data.

[0288] In some embodiments, the transceiver module 1302, also referred to as a transceiver unit, is used to implement sending and / or receiving functions. The transceiver module 1302 may consist of a transceiver circuit, a transceiver, a transceiver unit, or a communication interface.

[0289] In some embodiments, the transceiver module 1302 may include a receiving module and a sending module, respectively used to perform the receiving and sending steps performed by the fourth terminal in the above method embodiments, and / or other processes used to support the technology described herein; the processing module 1301 may be used to perform the processing steps (e.g., determining, excluding, etc.) performed by the fourth terminal in the above method embodiments, and / or other processes used to support the technology described herein.

[0290] The processing module 1301 is used to determine the interference power on the second resource; the transceiver module 1302 is used to send indication information to the first terminal, the indication information indicating the interference power on the second resource. The time domain location of the second resource overlaps with the time domain location of the third resource, but the frequency domain location of the second resource does not overlap with the frequency domain location of the third resource. The third resource is a resource within the sensing window, and the interference power on the second resource is determined based on the power of the signal carried by the third resource leaking onto the second resource. The signal carried by the third resource is the PSCCH of the second terminal and / or the PSSCH scheduled by the PSCCH.

[0291] Optionally, the interference power on the second resource is determined based on the power of signal leakage on the second resource carried by the third resource, including: the interference power on the second resource is determined based on the power of signal leakage on the second resource carried by the third resource, and the signal reception power of the PSCCH and / or PSSCH scheduled by the third terminal carried on the second resource.

[0292] Optionally, the power of signal leakage carried by the third resource on the second resource is the signal received power on the first channel state information interference measurement (CSI-IM) resource, wherein the first CSI-IM resource is located on the second resource.

[0293] Optionally, the transceiver module 1302 is further configured to receive first configuration information from a third terminal, the first configuration information being used to configure a first CSI-IM resource on a second resource; or, the transceiver module 1302 is further configured to receive second configuration information from a network device, the second configuration information being used to configure a periodic CSI-IM resource, the period of the periodic CSI-IM resource being N time slots, the periodic CSI-IM resource including the first CSI-IM resource, where N is a positive integer.

[0294] Optionally, CSI-IM resources are located on symbols other than protection symbols, and CSI-IM resources are not used for PSSCH and PSCCH transmissions.

[0295] Optionally, the power of signal leakage carried by the third resource onto the second resource is determined based on the signal reception power on the third resource and the in-band radiation template. The signal reception power on the third resource is determined by the signal reception power of the PSCCH of the second terminal and / or the signal reception power of the PSSCH scheduled by the PSCCH.

[0296] Optionally, the signal reception power on the third resource is the signal reception power of the PSCCH of the second terminal; or, the signal reception power on the third resource is the signal reception power of the PSSCH scheduled by the PSCCH; or, the signal reception power on the third resource is the maximum value between the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH; or, the signal reception power on the third resource is the minimum value between the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH; or, the signal reception power on the third resource is the average value between the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH.

[0297] All relevant content of each step involved in the above method embodiments can be referenced from the functional description of the corresponding functional module, and will not be repeated here.

[0298] In this application, the fourth terminal 130 is presented in an integrated manner, divided into various functional modules. Here, "module" may refer to an application-specific integrated circuit (ASIC), a circuit, a processor and memory that executes one or more software or firmware programs, integrated logic circuits, and / or other devices that can provide the above functions.

[0299] In some embodiments, those skilled in the art will recognize that the fourth terminal 130 can be implemented in hardware using... Figure 5 The communication device 50 shown is in the form of [example device].

[0300] As an example, Figure 13 The function / implementation process of the processing module 1301 can be achieved through... Figure 5 The processor 501 in the communication device 50 shown calls computer execution instructions stored in the memory 503 to implement the communication. Figure 13 The function / implementation process of the transceiver module 1302 can be obtained through Figure 5 This is achieved through the communication interface 504 in the communication device 50 shown.

[0301] In some embodiments, when Figure 13 When the fourth terminal 130 is a chip or chip system, the function / implementation process of the transceiver module 1302 can be implemented through the input / output interface (or communication interface) of the chip or chip system, and the function / implementation process of the processing module 1301 can be implemented through the processor (or processing circuit) of the chip or chip system.

[0302] Since the fourth terminal 130 provided in this embodiment can execute the above method, the technical effects it can achieve can be referred to the above method embodiment, and will not be repeated here.

[0303] As a possible product form, the first terminal or the fourth terminal described in the embodiments of this application can also be implemented using the following: one or more field programmable gate arrays (FPGAs), programmable logic devices (PLDs), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application.

[0304] As another possible product form, the first terminal or fourth terminal described in the embodiments of this application can be implemented using a general bus architecture. For ease of explanation, see [link to documentation]. Figure 14 , Figure 14 This is a schematic diagram of the structure of a communication device 1400 provided in an embodiment of this application. The communication device 1400 includes a processor 1401 and a transceiver 1402. The communication device 1400 can be a first terminal device, or a chip therein. Figure 14 Only the main components of the communication device 1400 are shown. In addition to the processor 1401 and transceiver 1402, the communication device may further include a memory 1403 and input / output devices (not shown).

[0305] The processor 1401 is primarily used to process communication protocols and data, control the entire communication device, execute software programs, and process the data within those programs. The memory 1403 is primarily used to store software programs and data. The transceiver 1402 may include radio frequency (RF) circuitry and an antenna. The RF circuitry is primarily used for converting baseband signals to RF signals and processing RF signals. The antenna is primarily used for transmitting and receiving RF signals in the form of electromagnetic waves. Input / output devices, such as touchscreens, displays, and keyboards, are primarily used to receive user input data and output data to the user.

[0306] The processor 1401, transceiver 1402, and memory 1403 can be connected via a communication bus.

[0307] When the communication device is powered on, the processor 1401 can read the software program in the memory 1403, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processor 1401 performs baseband processing on the data to be transmitted and outputs the baseband signal to the radio frequency (RF) circuit. The RF circuit processes the baseband signal and transmits the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor 1401. The processor 1401 converts the baseband signal into data and processes the data.

[0308] In another implementation, the radio frequency circuitry and antenna can be set up independently of the processor performing baseband processing. For example, in a distributed scenario, the radio frequency circuitry and antenna can be arranged remotely, independent of the communication device.

[0309] In some embodiments, this application also provides a communication device, which includes a processor for implementing the methods in any of the above method embodiments.

[0310] As one possible implementation, the communication device also includes a memory. This memory stores necessary computer programs and data. The computer program may include instructions, which a processor can invoke to instruct the communication device to execute the methods described in any of the above method embodiments. Alternatively, the memory may not be present in the communication device.

[0311] As another possible implementation, the communication device also includes an interface circuit, which is a code / data read / write interface circuit, used to receive computer execution instructions (which are stored in memory and may be read directly from memory or may be transmitted through other devices) and transmit them to the processor.

[0312] As another possible implementation, the communication device also includes a communication interface for communicating with modules outside the communication device.

[0313] It is understood that the communication device can be a chip or a chip system. When the communication device is a chip system, it can be composed of chips or may include chips and other discrete devices. This application does not specifically limit this.

[0314] This application also provides a computer-readable storage medium having a computer program or instructions stored thereon, which, when executed by a computer, implements the functions of any of the above-described method embodiments.

[0315] This application also provides a computer program product that, when executed by a computer, implements the functions of any of the above method embodiments.

[0316] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0317] It is understood that the systems, apparatuses, and methods described in this application can also be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0318] The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. The components shown as units may or may not be physical units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0319] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0320] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This 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 processes or functions described in the embodiments of this application are 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, the computer instructions can be transmitted from one website, computer, server, or data center to another 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 accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. 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., solid-state disk (SSD)). In this embodiment, the computer may include the aforementioned apparatus.

[0321] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, disclosure, and appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0322] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of this application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Thus, if such modifications and modifications of this application fall within the scope of the claims of this application and their equivalents, this application is also intended to include such modifications and modifications.

Claims

1. A method of resource selection, characterized by, The method is applied to a first terminal, and the method comprises: determining a candidate resource set, wherein the candidate resource set does not include a first resource, and wherein an interference power on a second resource associated with the first resource is greater than or equal to a first threshold value; wherein a periodically extended resource of the second resource and a resource set corresponding to the first resource overlap; the periodically extended resource of the second resource is determined according to a resource extended from the second resource according to a first time domain period; the first time domain period is determined according to a first period of a second terminal; a time domain position of the second resource overlaps a time domain position of a third resource, and a frequency domain position of the second resource does not overlap a frequency domain position of the third resource; the interference power on the second resource is determined according to a power of a signal carried by the third resource and leaked on the second resource; the third resource is a resource in a sensing window, and the signal carried by the third resource is a physical sidelink control channel (PSCCH) of the second terminal and / or a physical sidelink shared channel (PSSCH) scheduled by the PSCCH.

2. The method of claim 1, wherein, The resource set corresponding to the first resource includes the first resource and / or a periodically extended resource of the first resource, and the periodically extended resource of the first resource is determined according to a resource extended from the first resource according to a second time domain period, and the second time domain period is determined according to a second period of the first terminal.

3. The method according to claim 1 or 2, characterized in that, The interference power on the second resource is determined according to a power of a signal carried by the third resource and leaked on the second resource, comprising: The interference power on the second resource is determined according to a power of a signal carried by the third resource and leaked on the second resource, and a signal reception power of a PSCCH of a third terminal and / or a PSSCH scheduled by the PSCCH carried on the second resource.

4. The method according to any one of claims 1 to 3, characterized in that, The first time domain period is determined according to a first period of a second terminal, comprising: The first time domain period is determined according to a first period of the second terminal and a third period of a third terminal, and the second resource is used to carry a PSCCH of the third terminal and / or a PSSCH scheduled by the PSCCH.

5. The method according to any one of claims 1 to 4, characterized in that, The power of the signal carried by the third resource and leaked on the second resource is a signal reception power on a first channel state information interference measurement (CSI-IM) resource, and the first CSI-IM resource is located on the second resource.

6. The method of claim 5, wherein, The method further comprises: receiving first configuration information from a third terminal, wherein the first configuration information is used to configure the first CSI-IM resource on the second resource; or receiving second configuration information from a network device, wherein the second configuration information is used to configure a periodic CSI-IM resource, a period of the periodic CSI-IM resource is N time slots, the periodic CSI-IM resource includes the first CSI-IM resource, and N is a positive integer.

7. The method according to claim 5 or 6, characterized in that, The CSI-IM resource is located on a symbol other than a guard symbol, and the CSI-IM resource is not used for PSSCH and PSCCH transmission.

8. The method according to any one of claims 1 to 4, characterized in that, The power of the signal leakage of the third resource on the second resource is determined according to the signal reception power on the third resource and an in-band radiation template, and the signal reception power on the third resource is determined by the signal reception power of the PSCCH of the second terminal and / or the signal reception power of the PSSCH scheduled by the PSCCH.

9. The method of claim 8, wherein, The signal reception power on the third resource is the signal reception power of the PSCCH of the second terminal. Or, the signal reception power on the third resource is the signal reception power of the PSSCH scheduled by the PSCCH. Or, the signal reception power on the third resource is the maximum value of the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH. Or, the signal reception power on the third resource is the minimum value of the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH. Or, the signal reception power on the third resource is the average value of the signal reception power of the PSCCH of the second terminal and the signal reception power of the PSSCH scheduled by the PSCCH.

10. The method according to any one of claims 1 to 9, characterized in that, The method further comprises: Receiving indication information from a fourth terminal, the indication information being used to indicate the interference power on the second resource.

11. The method according to any one of claims 1 to 10, characterized in that, The second terminal and the first terminal share the same sidelink resource pool, and / or the distance between the second terminal and the first terminal is less than or equal to a second threshold.

12. A communication method characterized by comprising: The method is applied to a fourth terminal, and the method comprises: Determining the interference power on the second resource; Sending indication information to a first terminal, the indication information being used to indicate the interference power on the second resource; Wherein, the time domain position of the second resource overlaps with the time domain position of the third resource, and the frequency domain position of the second resource does not overlap with the frequency domain position of the third resource; the third resource is a resource within a sensing window; the interference power on the second resource is determined according to the power of the signal leakage of the third resource on the second resource, and the signal carried by the third resource is a physical sidelink control channel PSCCH of a second terminal and / or a physical sidelink shared channel PSSCH scheduled by the PSCCH.

13. The method of claim 12, wherein, The interference power on the second resource is determined according to the power of the signal leakage of the third resource on the second resource, comprising: The interference power on the second resource is determined according to the power of the signal leakage of the third resource on the second resource, and the signal reception power of the PSCCH of a third terminal and / or the PSSCH scheduled by the PSCCH carried on the second resource.

14. The method according to claim 12 or 13, characterized in that, The power of the signal leakage of the third resource on the second resource is the signal reception power on a first channel state information interference measurement CSI-IM resource, wherein the first CSI-IM resource is located on the second resource.

15. The method of claim 14, wherein, The method further comprises: receive first configuration information from the third terminal, the first configuration information being used for configuring the first CSI-IM resource on the second resource; or receive second configuration information from the network device, the second configuration information being used for configuring a periodic CSI-IM resource, a period of the periodic CSI-IM resource being N slots, the periodic CSI-IM resource including the first CSI-IM resource, and the N being a positive integer.

16. The method according to claim 14 or 15, characterized in that The CSI-IM resource is located on a symbol other than a guard symbol, and the CSI-IM resource is not used for PSSCH and PSCCH transmission.

17. The method of claim 12 or 13, wherein, The power of signal leakage of the third resource on the second resource is determined according to signal reception power on the third resource and an in-band radiation template, and the signal reception power on the third resource is determined by signal reception power of a PSCCH of the second terminal and / or signal reception power of a PSSCH scheduled by the PSCCH.

18. A first terminal, comprising: The first terminal includes a processing module. The processing module is configured to determine a candidate resource set, the candidate resource set not including the first resource, wherein interference power on a second resource associated with the first resource is greater than or equal to a first threshold. The periodic extension resource of the second resource and a resource set corresponding to the first resource overlap; the periodic extension resource of the second resource is determined according to a resource obtained by extending the second resource according to a first time domain period, the first time domain period being determined according to a first period of the second terminal; the time domain position of the second resource overlaps with the time domain position of the third resource, and the frequency domain position of the second resource does not overlap with the frequency domain position of the third resource; the interference power on the second resource is determined according to the power of signal leakage of the third resource on the second resource; the third resource is a resource in a sensing window, and the signal carried by the third resource is a physical sidelink control channel (PSCCH) of the second terminal and / or a physical sidelink shared channel (PSSCH) scheduled by the PSCCH.

19. The first terminal of claim 18, wherein, The resource set corresponding to the first resource includes the first resource and / or a periodic extension resource of the first resource, the periodic extension resource of the first resource being determined according to a resource obtained by extending the first resource according to a second time domain period, the second time domain period being determined according to a second period of the first terminal.

20. The first terminal according to claim 18 or 19, characterized by The interference power on the second resource is determined according to the power of signal leakage of the third resource on the second resource, including: The interference power on the second resource is determined according to the power of signal leakage of the third resource on the second resource, and signal reception power of a PSCCH of the third terminal and / or a PSSCH scheduled by the PSCCH carried on the second resource.

21. The first terminal according to any of claims 18-20, characterized by The first time domain period is determined according to a first period of the second terminal, including: The first time domain period is determined according to a first period of the second terminal and a third period of a third terminal, and the second resource is used to carry PSCCH of the third terminal and / or PSSCH scheduled by the PSCCH.

22. The first terminal according to any of claims 18-21, characterized by The power of signal leakage of the third resource on the second resource is signal reception power on a first channel state information interference measurement (CSI-IM) resource, wherein the first CSI-IM resource is located on the second resource.

23. The first terminal of claim 22, wherein, The first terminal further comprises a transceiver module; The transceiver module is configured to receive first configuration information from a third terminal, wherein the first configuration information is used to configure the first CSI-IM resource on the second resource; or The transceiver module is configured to receive second configuration information from a network device, wherein the second configuration information is used to configure a periodic CSI-IM resource, the periodic CSI-IM resource has a period of N slots, the periodic CSI-IM resource comprises the first CSI-IM resource, and N is a positive integer.

24. The first terminal according to claim 22 or 23, characterized by The CSI-IM resource is located on a symbol other than a guard symbol, and the CSI-IM resource is not used for PSSCH and PSCCH transmission.

25. The first terminal according to any of claims 18-21, characterized by The power of signal leakage of the third resource on the second resource is determined according to signal reception power on the third resource and an in-band radiation template, wherein the signal reception power on the third resource is determined by signal reception power of PSCCH of the second terminal and / or signal reception power of PSSCH scheduled by the PSCCH.

26. The first terminal of claim 25, wherein, The signal reception power on the third resource is signal reception power of PSCCH of the second terminal; Or, the signal reception power on the third resource is signal reception power of PSSCH scheduled by the PSCCH; Or, the signal reception power on the third resource is a maximum value of signal reception power of PSCCH of the second terminal and signal reception power of PSSCH scheduled by the PSCCH; Or, the signal reception power on the third resource is a minimum value of signal reception power of PSCCH of the second terminal and signal reception power of PSSCH scheduled by the PSCCH; Or, the signal reception power on the third resource is an average value of signal reception power of PSCCH of the second terminal and signal reception power of PSSCH scheduled by the PSCCH.

27. The first terminal according to any of claims 18-26, characterized by The first terminal further comprises a transceiver module; The transceiver module is configured to receive indication information from a fourth terminal, wherein the indication information is used to indicate interference power on the second resource.

28. The first terminal according to any of claims 18-27, characterized by The second terminal and the first terminal share a same sidelink resource pool, and / or a distance between the second terminal and the first terminal is less than or equal to a second threshold value.

29. A fourth terminal, comprising: The fourth terminal comprises a processing module and a transceiver module; The processing module is configured to determine interference power on a second resource; The transceiver module is configured to send indication information to a first terminal, wherein the indication information is used to indicate interference power on the second resource; and The transceiver module is configured to send indication information to a first terminal, wherein the indication information is used to indicate interference power on the second resource. The time domain position of the second resource overlaps with the time domain position of a third resource, and the frequency domain position of the second resource does not overlap with the frequency domain position of the third resource; the third resource is a resource in a sensing window; the interference power on the second resource is determined according to the power of a signal carried by the third resource and leaked on the second resource, the signal carried by the third resource being a physical sidelink control channel (PSCCH) of a second terminal and / or a physical sidelink shared channel (PSSCH) scheduled by the PSCCH.

30. The fourth terminal according to claim 29, characterized by The interference power on the second resource is determined according to the power of a signal carried by the third resource and leaked on the second resource, including: The interference power on the second resource is determined according to the power of a signal carried by the third resource and leaked on the second resource, and the signal reception power of a PSCCH of a third terminal and / or a PSSCH scheduled by the PSCCH carried on the second resource.

31. The fourth terminal according to claim 29 or 30, characterized by The power of the signal carried by the third resource and leaked on the second resource is the signal reception power on a first channel state information interference measurement (CSI-IM) resource, wherein the first CSI-IM resource is located on the second resource.

32. The fourth terminal according to claim 31, wherein The transceiver is further configured to receive first configuration information from a third terminal, the first configuration information being used to configure the first CSI-IM resource on the second resource; or The transceiver is further configured to receive second configuration information from a network device, the second configuration information being used to configure a periodic CSI-IM resource, the periodic CSI-IM resource having a period of N slots, the periodic CSI-IM resource including the first CSI-IM resource, and N being a positive integer.

33. The fourth terminal according to claim 31 or 32, characterized by The CSI-IM resource is located on a symbol other than a guard symbol, and the CSI-IM resource is not used for PSSCH and PSCCH transmission.

34. The fourth terminal according to claim 29 or 30, characterized by The power of the signal carried by the third resource and leaked on the second resource is determined according to the signal reception power on the third resource and an in-band radiation template, the signal reception power on the third resource being determined by the signal reception power of a PSCCH of the second terminal and / or the signal reception power of a PSSCH scheduled by the PSCCH.

35. A communications device, characterized by The communication device includes a processor; The processor is configured to execute a computer program or instructions to cause the communication device to perform the method according to any one of claims 1-11, or to cause the communication device to perform the method according to any one of claims 12-17.

36. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program or instructions, when the computer program or instructions are executed by a communication device, the method according to any one of claims 1-11 is implemented, or the method according to any one of claims 12-17 is implemented.

37. A computer program product, characterised in that, When the computer program product is running on a communication device, the method according to any one of claims 1-11 is implemented, or the method according to any one of claims 12-17 is implemented.

Images