A resource selection method and its user equipment in a vehicle networking system

Abstract

A method for resource selection in a terminal-to-terminal system and a terminal device thereof. The method includes: the terminal device obtains a first resource set, where the resources in the first resource set are candidate transmission resources; the terminal device performs listening, and excludes unavailable resources from the first resource set according to the RSRP of the resources occupied by other sending terminals measured and the RSRP threshold value; the terminal device selects a resource from the first resource set for data transmission. The method and the terminal device can exclude the resources occupied by other terminals with a large difference in transmission power from the first resource set, thereby avoiding pre-empting the transmission resources of terminals with low transmission power and avoiding causing interference to their transmissions.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and particularly to the field of vehicle networking technologies.

Background Art

[0002] In traditional cellular systems, communication data is received or transmitted through base stations. Different from this, the vehicle networking system adopts a direct communication method from terminal to terminal (D2D, Device to Device). It is a sidelink transmission technology (SL: Sidelink), which has higher spectral efficiency and lower transmission delay.

[0003] 3GPP (3rd Generation Partnership Project) defines two transmission modes for the vehicle networking system: one is that the base station allocates transmission resources for the terminal; the other is that the vehicle-mounted terminal selects transmission resources from the resource pool for transmission, and can select them by listening or randomly.

[0004] In NR-V2X, that is, in the V2X vehicle networking wireless communication technology evolved from the new radio (NR) system of the 5th Generation (5G) mobile communication system, higher requirements are put forward for data interaction between vehicles, such as higher throughput, lower delay, higher reliability, larger coverage, more flexible resource allocation, etc. In addition to the broadcast transmission mode, it also introduces unicast and multicast transmission modes, also introduces a power control mechanism, and also introduces a sidelink feedback channel to improve reliability.

[0005] For the broadcast transmission mode, in order to enable more terminals to receive data, the sending terminal usually sends data with the maximum sending power. However, for the unicast or multicast transmission mode, because the number or distance of receiving terminals is limited, the sending terminal can adjust the sending power according to the sidelink condition, so as to achieve the purpose of energy saving and reduce interference to other transmission links.

[0006] However, after the power control is introduced, the sending terminal can reduce the sending power under certain conditions, which may cause other terminals to misjudge that the transmission resources used by the sending terminal are available during the listening process, resulting in the problem of preempting the transmission resources of low-sending-power users and interfering with their transmissions.

Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a resource selection method and its terminal device for a terminal-to-terminal system that can reduce transmission interference.

[0008] The present invention provides the following technical solutions:

[0009] On the one hand, a method for resource selection in a terminal-to-terminal system includes: a terminal device obtaining a first resource set, where the resources in the first resource set are candidate transmission resources; the terminal device performing listening, and excluding unavailable resources from the first resource set according to the RSRP of the resources occupied by other sending terminals measured and the RSRP threshold value; and the terminal device selecting a resource from the first resource set for data transmission.

[0010] On the other hand, a terminal device in a terminal-to-terminal system includes: a listening module for obtaining a first resource set, where the resources in the first resource set are candidate transmission resources; a selection module for the terminal device to perform listening, and excluding unavailable resources from the first resource set according to the RSRP of the resources occupied by other sending terminals measured and the RSRP threshold value; and a transmission module for selecting a resource from the first resource set for data transmission.

[0011] A terminal device includes: a processor, a memory, and is characterized in that: an uplink control channel transmission program stored on the memory and executable on the processor, and when the processor executes the uplink control channel transmission program, the resource selection method according to any one of the above is implemented.

[0012] A computer-readable storage medium is characterized in that a resource selection program is stored on the computer-readable storage medium, and when the resource selection program is executed by a processor, the resource selection method according to any one of the above is implemented.

[0013] The beneficial effect of the present invention is that: in a terminal-to-terminal system, since other sending terminals may perform power control, the reference signal RSRP thereof may be relatively low, and it is misjudged that the resource is available. Therefore, according to the RSRP of the resources occupied by other sending terminals measured and the RSRP threshold value, unavailable resources are excluded from the first resource set, so as to compensate for the misjudgment of whether the transmission resource is available caused by the transmission power difference, thereby avoiding preempting the transmission resources of low transmission power terminals and causing interference to their transmissions.

Description of the Drawings

[0014] Figure 1 It is a scenario diagram applied to the specific embodiment of the present invention.

[0015] Figure 2 It is a flowchart of the first specific embodiment of the resource selection method in a terminal-to-terminal system of the present invention.

[0016] Figure 3 It is a flowchart of the second specific embodiment of the resource selection method in a terminal-to-terminal system of the present invention.

[0017] Figure 4 It is a flowchart of Method 1 in Embodiment 2 of the specific implementation manner.

[0018] Figure 5 It is a flowchart of Method 2 in Embodiment 2 of the specific implementation manner.

[0019] Figure 6 It is a flowchart of Method 3 in Embodiment 2 of the specific implementation manner.

[0020] Figure 7 It is a flowchart of Embodiment 3 of the method for resource selection in a terminal-to-terminal system according to the present invention.

[0021] Figure 8 PSCCH and PSSCH in Embodiment 3 occupy different time domain resources.

[0022] Figure 9 It is a flowchart of Embodiment 4 of the method for resource selection in a terminal-to-terminal system according to the present invention.

[0023] Figure 10 It is a schematic diagram of a resource pool in Embodiment 4 of the specific implementation manner.

[0024] Figure 11 It is a module diagram of Embodiment 5 of a terminal device in a terminal-to-terminal system according to the present invention.

[0025] Figure 12 It is a flowchart of Example 1 in Embodiment 5 of the specific implementation manner.

[0026] Figure 13 It is a flowchart of Example 2 in Embodiment 5 of the specific implementation manner.

[0027] Figure 14 It is a flowchart of Example 3 in Embodiment 5 of the specific implementation manner.

[0028] Figure 15 It is a module diagram of Embodiment 7 of a terminal device in a terminal-to-terminal system according to the present invention.

[0029] Figure 16 It is a module diagram of Embodiment 8 of a terminal device in a terminal-to-terminal system according to the present invention.

[0030] Figure 17 It is a schematic diagram of an additional module of the selection module further optimized in Embodiments 5 to 8.

[0031] Figure 18 It is a schematic diagram of the structure of a terminal device provided in Embodiment 9 of the present invention.

Specific implementation manner

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure content of the present utility model more thorough and comprehensive.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] The following is a corresponding table of the abbreviations of the key terms and their English full names that appear in this application:

[0035] Abbreviation Full English Name Full Chinese Name LTE Long Term Evaluation Long Term Evolution V2V Vehicle to Vehicle Vehicle to Vehicle V2X Vehicle to Everything Vehicle to Everything D2D Device to Device Device to Device SCI Sidelink Control Information Sidelink Control Information PSCCH Physical Sidelink Control Channel Physical Sidelink Control Channel PSSCH Physical Sidelink Shared Channel Physical Sidelink Shared Channel S-RSRP Sidelink Reference Signal Received Power Sidelink Reference Signal Received Power S-RSSI Sidelink Received Signal Strength Indicator Sidelink Received Signal Strength Indicator DMRS Demodulation Reference Signal Demodulation Reference Signal

[0036] The specific implementation manner of the present invention discloses a resource selection method applied to a vehicle networking system and its terminal device. The system architecture used in the following specific implementation manner of the present invention is as follows: In NR-V2X, before transmitting data, the transmitting terminal needs to select transmission resources. Since NR-V2X in the vehicle networking system not only has a broadcast transmission communication method, but also introduces unicast transmission, multicast transmission communication methods, and a power control mechanism. Since in unicast transmission and multicast transmission, the terminal will perform power control and can reduce the transmission power, this will cause other transmitting terminals to mistakenly think that the transmission resources used by the terminal performing power control are available when listening and selecting transmission resources, resulting in the problem of preempting the transmission resources of the terminal with low transmission power and interfering with its transmission. Therefore, when other transmitting terminals select transmission resources, it is necessary to identify and exclude the transmission resources to avoid large transmission interference caused by large differences in transmission power between different terminals.

[0037] Such as Figure 1As shown in the figure, assume that there are four in-vehicle terminals, namely UE1, UE2, UE3, and UE4, in the system. Among them, unicast transmission is performed between UE1 and UE2, and UE3 performs broadcast transmission. When UE1 and UE2 perform unicast communication, power control is carried out. Since UE1 and UE2 are very close to each other, the transmission power of UE1 will be very low. For example, the transmission power of UE1 is 10 dBm. When UE3 performs listening, due to the low transmission power of UE1, the PSSCH-RSRP of UE1 measured by UE3 is very low, and it is considered that the interference on the transmission resources used by UE1 is very low, and this transmission resource is an available resource. If UE3 selects this transmission resource and performs broadcast transmission, in order to ensure that the data of UE3 can be received by more users, such as UE4, usually UE3 will transmit at the maximum power (for example, 23 dBm). Therefore, the signal of UE3 interferes with the reception of UE2, resulting in the failure of UE2 to receive the data of UE1.

[0038] The following specific embodiments of the present invention will elaborate in detail on how to exclude the resources occupied by terminal devices with significantly different transmission powers, so as to reduce or avoid the impact of power control on the listening and resource selection processes of terminals, and reduce the resulting transmission interference. Specific Embodiment 1

[0040] Please refer to Figure 2 , which is a flowchart of Specific Embodiment 1 of a resource selection method in a terminal-to-terminal system of the present invention. This method is applied to terminal devices. The method includes:

[0041] Step 110, the terminal device obtains a first resource set, where the resources in the first resource set are candidate transmission resources;

[0042] Step 120, the terminal device performs listening, and excludes unavailable resources from the first resource set according to the RSRP of the resources occupied by other transmitting terminals measured and the RSRP threshold;

[0043] Step 130, the terminal device selects a resource from the first resource set for data transmission.

[0044] Specifically, the terminal device makes a selection in the first resource set according to certain criteria. For example, Step 130 may specifically include:

[0045] In step 131, the terminal device performs S-RSSI (Sidelink Received Signal Strength Indicator) detection on the resources in the first resource set, and sorts the corresponding resources according to energy levels based on the S-RSSI detection values, and puts the resources with the lowest energy (such as the lowest 20% of energy) into the second resource set; wherein, the terminal device performs S-RSSI detection on the resources in the first resource set, including, the terminal performs S-RSSI detection on the resources within the listening window, and calculates the S-RSSI of the resources in the first resource set based on the S-RSSI detection results.

[0046] Step 132: The terminal selects a resource from the second resource set for data transmission. Optionally, the terminal selects a resource with equal probability from the second resource set for data transmission.

[0047] Preferably, after step 120, if the number of available resources in the first resource set is less than a threshold (for example, the threshold is 20% of the number of all candidate resources in the resource selection window, or 20% of the total number of initial resources in the first resource set), the listening terminal device increases the RSRP threshold by a certain value, such as 3dB, and repeats the resource exclusion process of step 120 above.

[0048] Preferably, the first resource set is a resource set consisting of resources within a resource selection window.

[0049] Preferably, the size of the candidate transmission resource is determined based on the data to be sent by the terminal device. Specific implementation method 2

[0051] Please see Figure 3 , which is a flowchart of a specific implementation method 2 of a resource selection method in a terminal-to-terminal D2D system of the present invention. Among them, step 110 and step 130 are the same as the above-mentioned specific implementation method 1. The difference between the specific implementation method 2 and the above-mentioned specific implementation method 1 is that step 120 is specifically step 120A: determining the difference between the transmission power of other transmitting terminals and the transmission power of the data to be sent by the terminal device, and adjusting the RSRP of the measured resources occupied by other transmitting terminals according to the difference, or adjusting the RSRP threshold value according to the difference, and excluding unavailable resources from the first resource set according to the adjusted RSRP or the adjusted RSRP threshold value. Specific implementation methods are:

[0052] Method 1

[0053] Please see Figure 4 , the step 120A specifically includes:

[0054] Step 1211: Determine the threshold value of PSSCH-RSRP, i.e., the first PSSCH-RSRP threshold value (hereinafter, RSRP_thd is used to represent the PSSCH-RSRP threshold value). Specifically, the first RSRP_thd can be determined according to the priority information P1 carried in the PSCCH of the detected other transmitting terminal and the priority information P2 of the data to be transmitted by the terminal device. For example, by pre-configuring or network-configuring the mapping relationship between the priority and the PSSCH-RSRP threshold value, the terminal device performing listening can find this mapping relationship according to P1 received from other transmitting terminals and its own P2 to determine the RSRP_thd of the PSSCH.

[0055] Step 1212: Adjust the first RSRP_thd according to the transmission power of the other transmitting terminal and the transmission power of the data to be transmitted by the terminal device to obtain the second RSRP_thd.

[0056] Step 1213: After the terminal device detects the PSCCH of the other transmitting terminal, measure the RSRP of the PSSCH scheduled by the PSCCH to obtain the first PSSCH-RSRP. It should be noted that step 1213 is not limited to this order. It can be before step 1211 or before step 1212.

[0057] Step 1214: Exclude the unavailable resources in the first resource set according to the threshold value of the second PSSCH-RSRP and the first PSSCH-RSRP. Specifically, when the first PSSCH-RSRP of the PSSCH is greater than or equal to the second RSRP_thd, exclude the resources occupied by the other transmitting terminal in the first resource set.

[0058] Specifically, in step 1212, the transmission power of the other terminal can be determined according to the information carried in the PSCCH.

[0059] Among them, the side link control information SCI carried in the PSCCH, the SCI carries the first indication information, and the first indication information is used to determine the transmission power of the other transmitting terminal. The terminal device adjusts the first RSRP_thd according to the first indication information and the transmission power of the data to be transmitted by the terminal device. More specifically, the transmission power indication information can be any one of the following information:

[0060] The first type: Information used to indicate the transmission power of the other transmitting terminal. For example, the transmission power of the terminal is quantified, and the quantified transmission power information is carried in the SCI.

[0061] For example, the maximum transmission power of the terminal is 23 dBm. If the transmission power of the terminal is less than 0 dBm, it is quantized to 0 dBm. If the transmission power of the terminal is between [0, 23] dBm, it is processed by rounding up. For example, if the transmission power of the terminal is 5.3 dBm, it is quantized to 6 dBm. If the transmission power of the terminal is 6.8 dBm, it is quantized to 7 dBm, and so on. Then the quantized transmission power of the terminal is an integer between [0, 23], that is, 5 bits are required to represent any quantized transmission power value. The transmission power of the terminal can be determined according to the 5-bit transmission power indication information carried in the SCI.

[0062] The second is the power level identifier. For example, different levels are divided for the transmission power, and the corresponding transmission power can be determined according to this power level identifier;

[0063] For example, level division is performed according to the transmission power of the terminal. If the transmission power of the terminal is less than or equal to 0 dBm, it is recorded as the first level. If the transmission power is in (0, 1] dBm, it is recorded as the second level. If the transmission power is in (1, 2] dBm, it is recorded as the third level. If the transmission power is in (2, 3] dBm, it is recorded as the fourth level, and so on. If the transmission power is in (22, 23] dBm, it is recorded as the twenty-fourth level, where (A, B] means the transmission power is greater than A and less than or equal to B. Therefore, 5 bits are required to represent any power level. The power level of the terminal can be determined according to the 5-bit transmission power indication information carried in the SCI.

[0064] Optionally, in each power level, the maximum transmission power in that level is recorded as the transmission power of the terminal. For example, if the power level of a terminal is the third level, 2 dBm is determined as the transmission power of the terminal.

[0065] The third is the information used to indicate the difference between the transmission power of the terminal and the first power; where the first power can be at least one of the following:

[0066] 1. The maximum transmission power of the terminal. For example, the maximum transmission power of the terminal is 23 dBm; or,

[0067] 2. A pre-configured power value. For example, the power 23 dBm is predefined by the protocol; or

[0068] 3. A power determined according to the parameter information carried in the SCI. For example, the threshold value determined according to the priority information in the SCI, such as the RSRP threshold value determined according to the priority.

[0069] Further, the power difference information can be quantified or classified into levels. The specific quantification method or level classification method can refer to the methods in the first or second method, which will not be elaborated here.

[0070] Optionally, if the listening terminal detects that the transmission power of another terminal is greater than or equal to the transmission power of the data to be transmitted by the listening terminal, the listening terminal does not adjust RSRP_thd.

[0071] For example, as in Figure 1 , assume that UE1 is listening. UE1 can detect the PSCCH of another transmitting terminal UE3 and know that its transmission power is 23 dBm, which is greater than its own transmission power of 10 dBm. Then UE1 does not adjust the RSRP threshold value during the listening process.

[0072] Illustratively, as Figure 1 described, assume that UE3 is listening. UE3 can detect the PSCCH of another transmitting terminal UE1 and know that its transmission power PtUE1 is 10 dBm, while the transmission power of UE3 itself is PtUE3 = 23 dBm. UE3 determines the first PSSCH - RSRP threshold value RSRP_thd1. RSRP_thd1 can be determined according to the priority information P1 carried in the SCI of the detected other transmitting terminal and the priority information P2 of the data to be transmitted by the terminal device. Assume that RSRP_thd1 = 4 dB determined according to P1 and P2. According to the transmission power of the other transmitting terminal and the transmission power of the data to be transmitted by the terminal device, RSRP_thd1 is adjusted to obtain the second PSSCH - RSRP threshold value RSRP_thd2. For example, RSRP_thd2 = RSRP_thd1 + A, where the parameter A is the difference between the transmission power of the other transmitting terminal and the transmission power of the data to be transmitted by the terminal device. As Figure 1 described, RSRP_thd2 = 4+(10 - 23)= - 9 dB. UE3 measures the PSSCH - RSRP1 of the other transmitting device UE1. Compare this PSSCH - RSRP1 with this RSRP_thd2. If it is greater than or equal to this RSRP_thd2, the transmission resources used by UE1 are excluded. If it is lower than this RSRP_thd2, the transmission resources used by UE1 are considered available.

[0073] Method 2

[0074] Please refer to Figure 5 , and step 120 specifically includes:

[0075] Step 1221: After the terminal device detects the PSCCH of the other sending terminal, it measures the reference signal of the PSSCH scheduled by the PSCCH to obtain the first PSSCH-RSRP;

[0076] Step 1222: Adjust the first PSSCH-RSRP according to the transmission power of the other sending terminal and the transmission power of the data to be sent by the terminal device to obtain the second PSSCH-RSRP; Specifically, the method for obtaining the transmission power of the other sending terminal can refer to the specific description in Step 1212 above, and will not be elaborated here.

[0077] Step 1223: Determine the first RSRP_thd of the PSSCH; Specifically, it can be determined according to the priority information P1 carried in the PSCCH of the other sending terminal detected and the priority information P2 of the data to be transmitted by the terminal device; It should be noted that this step is not limited to this order, and it can be before Step 1221 or before Step 1222.

[0078] Step 1224: Exclude the unavailable resources in the first resource set according to the first RSRP_thd and the second PSSCH-RSRP. Specifically, when the second RSRP is greater than or equal to the first RSRP_thd, exclude the resources occupied by the other sending terminal in the first resource set.

[0079] Optionally, if the listening terminal detects that the transmission power of another terminal is greater than or equal to the transmission power of the data to be sent by the listening terminal, the listening terminal does not adjust the PSSCH-RSRP.

[0080] For example, as in Figure 1 , assume that UE1 is listening. UE1 can detect the PSCCH of another sending terminal UE3 and know that its transmission power is 23 dBm, which is greater than its own transmission power of 10 dBm. Then UE1 does not adjust the measured PSSCH-RSRP of UE3 during the listening process.

[0081] Illustrate with an example. Still as Figure 1 stated, assume that UE3 is listening. The transmission power of UE1 is PtUE1 = 10 dBm, and the transmission power of UE3 is PtUE3 = 23 dBm. UE3 determines the first RSRP threshold RSRP_thd to be 4 dB according to the priorities P1 and P2. UE3 measures the first PSSCH-RSRP1 of UE1 to be 5 dB.

[0082] Adjust the first PSSCH-RSRP1 according to the transmission power of the other sending terminal and the transmission power of the data to be sent by the terminal device to obtain the second PSSCH-RSRP2. For example, PSSCH-RSRP2 = 5 + (23 - 10) = 18 dB. Compare this PSSCH-RSRP2 with the RSRP_thd. If it is greater than or equal to the RSRP_thd, exclude the transmission resources used by UE1. If it is lower than the RSRP_thd, consider the transmission resources used by UE1 to be available.

[0083] Method 3

[0084] Please continue to refer to Figure 6 , optimized, combining the above Method 1 and Method 2, in the second specific embodiment of the present invention, the method further includes:

[0085] Step 140, limit the power control of the terminal device within a time window. Among them, the time window can be obtained through network configuration or preset methods.

[0086] Specifically, this step 140 can be: control the terminal device not to perform power control within a time window, and power control can only be performed when transitioning from one time window to the next.

[0087] Specifically, step 140 can also be: in each time window, when the terminal device transmits data for the first time, power control can be performed according to the sidelink path loss, and power control is not performed during other transmissions within this time window. That is, the transmission power is not adjusted according to the sidelink path loss.

[0088] Optionally, after the terminal adjusts the transmission power according to the sidelink path loss, the adjusted transmission power indication information of the terminal is carried in the SCI, and the transmission power indication information is the indication information described in step 1212 of the second specific embodiment.

[0089] In the second specific embodiment of the present invention, if the terminal device performing listening detects the PSCCH, it will measure the reference signal (such as RSRP) of the PSSCH scheduled by the PSCCH. If the measured RSRP is greater than or equal to the RSRP threshold value, it is considered that this resource is unavailable and this resource needs to be excluded. However, considering that in NR-V2X, other transmitting terminals may perform power control, so its reference signal RSRP may be relatively low, and it is misjudged that this resource is available. Therefore, it is necessary to adjust RSRP_thd according to the difference between the transmitting power of other transmitting terminals and its own data to be transmitted, and adjust the measured PSSCH-RSRP, and exclude the resources occupied by other terminals with a large transmission power difference from the first resource set, so as to compensate for the misjudgment of whether the transmission resource is available caused by the transmission power difference, and avoid preempting the transmission resources of low-transmission-power terminals and causing interference to their transmissions. Specific Embodiment Three

[0091] Please refer to Figure 7 , which is the flowchart of the specific embodiment three of the resource selection method in a terminal-to-terminal D2D system of the present invention.

[0092] In this specific embodiment three, steps 110 and 130 are the same as those in the above specific embodiment one. The difference between the specific embodiment three and the above specific embodiment one is that this step 120 specifically includes:

[0093] Step 1233, after the terminal device detects the PSCCH of the other transmitting terminal, measure the PSCCH-RSRP of the PSCCH; optionally, the reference signal is the demodulation reference signal DMRS of the PSCCH;

[0094] Step 1234, determine the PSCCH-RSRP threshold value (PSCCH-RSRP_thd); optionally, the threshold value is determined according to the priority information P1 in the SCI carried in the PSCCH and the priority P2 of the data to be transmitted by the terminal device. The specific determination method can refer to the description in the second specific embodiment and will not be elaborated here;

[0095] Step 1235, determine that the measured PSCCH-RSRP is greater than or equal to the PSCCH-RSRP threshold value, and then exclude the resources occupied by the other transmitting terminal from the first resource set. That is, when the PSCCH-RSRP is greater than or equal to this threshold value, it is considered that the transmission resources occupied by this other terminal device are unavailable, otherwise it is considered available.

[0096] Preferably, this step 120 further includes:

[0097] Step 1231, the PSCCH of the other terminal devices is power-controlled in a broadcast manner; that is, the downlink path loss is considered in power control, and the sidelink path loss is not considered; or the PSCCH is not power-controlled according to the sidelink path loss; or the PSCCH is not power-controlled; or the PSCCH is transmitted at the maximum transmission power. Herein, the maximum transmission power may be the maximum transmission power supported by the terminal or the maximum transmission power configured by the network.

[0098] Preferably, this step 120 further includes:

[0099] Step 1232, the PSSCH of the other terminal devices is power-controlled in a unicast or multicast manner. That is, the downlink path loss and / or the sidelink path loss are considered in power control. When the terminal performs power control in a unicast or multicast manner, the transmission power of the terminal may be determined according to the path loss of the downlink between the terminal and the network, or according to the path loss of the sidelink between the terminal and the receiving terminal, or according to the path losses of the downlink and the sidelink simultaneously.

[0100] Optionally, the PSCCH and the PSSCH may use different time-domain resources for data transmission. Since the PSCCH is transmitted at the maximum transmission power and the PSSCH is power-controlled according to the sidelink path loss, the PSCCH and the PSSCH may use different time-domain resources for transmission. Herein, the PSCCH and the PSSCH may be located in the same or different time slots / subframes. As Figure 8 shown, Pt-1 ≤ Pt-max, where Pt-max represents the maximum transmission power and Pt-1 represents the transmission power determined according to the sidelink path loss.

[0101] Since the terminal device performing listening needs to detect the PSCCH of other transmitting terminals, obtain the transmission resources of the PSSCH according to the PSCCH, and measure the reference signal PSSCH-RSRP of the PSSCH and compare it with the RSRP threshold value to determine whether the resources used by the PSSCH are available. However, power control will reduce the PSCCH transmission range or lower the PSSCH-RSRP measurement value, resulting in other terminals not detecting that the terminal device has occupied the transmission resources, thus misjudging that the resources are available.

[0102] In the third specific embodiment of the present invention, the PSSCH is power-controlled in a unicast or multicast manner, and the transmission power of the PSCCH is determined in a broadcast manner, that is, the PSCCH is not power-controlled, or the PSCCH is power-controlled according to the downlink path loss. Therefore, determining whether the resources are available according to the measured PSCCH-RSRP will not lead to misjudgment and avoid the situation of preempting the transmission resources of low-transmission-power users. Specific Embodiment 4

[0104] Please refer to Figure 9 , which is a flowchart of Specific Embodiment 4 of the resource selection method in a vehicle networking system according to the present invention. In this Specific Embodiment 4, step 130 is the same as that in the above Specific Embodiment 1. The difference between Specific Embodiment 3 and the above Specific Embodiment 1 is that

[0105] Step 110 specifically includes:

[0106] Step 1141, the terminal device obtains configuration information, and the configuration information is used to determine the correspondence between the transmission power level and the resource pool; as Figure 10 shown, the transmission power of the terminal device can be graded, and terminal devices in the same transmission power level use resources in the same resource pool, or each resource pool can also correspond to multiple power levels; alternatively, there may be no power level, that is, each resource pool corresponds to a power range, and the terminal determines the corresponding resource pool according to its own transmission power.

[0107] Optionally, the configuration information is the configuration information sent by the network or pre-configured information.

[0108] Step 1142, in the resource pool corresponding to the transmission power of the terminal device, obtain the first resource set.

[0109] Then step 120 is specifically:

[0110] If it is determined that the measured RSRP of the PSSCH for resource scheduling occupied by the other sending terminal is greater than or equal to RSRP_thd, then exclude this resource from the first resource set. Since the transmission powers of the terminal devices in the same resource pool are at the same power level, that is, the transmission powers of each terminal do not differ much, therefore, in the process of resource listening or selection in this resource pool, the existing resource listening and selection process can be followed without adjusting the RSRP_thd threshold or the measured PSSCH-RSRP. The resource selection process can be:

[0111] The terminal device determines the PSSCH-RSRP threshold value;

[0112] After the terminal device detects the PSCCH of the other sending terminal, it measures the RSRP of the PSSCH scheduled by the PSCCH to obtain PSSCH-RSRP;

[0113] If the PSSCH-RSRP is greater than or equal to the PSSCH-RSRP threshold value, exclude the resources occupied by the other sending terminal from the first resource set.

[0114] Optimized, between steps 120 and 130 of this method, step 140 is further included:

[0115] When the transmission power of the terminal device changes, resulting in a change in its corresponding resource pool, switch the resource pool corresponding to the terminal device; restart steps 110 and 120, and perform listening and resource selection in the switched resource pool.

[0116] In the fourth specific embodiment of the present invention, by dividing the resource pool according to the power level, the transmission powers of the terminals in the same resource pool are at the same power level and not much different, thereby avoiding the influence on the listening result due to a large difference in transmission power, and avoiding the situation of preempting the transmission resources of low-transmission-power users.

[0117] Preferably, the step of "excluding the resources occupied by the other transmitting terminals in the first resource set" in the above specific embodiments 1 to 4 may include:

[0118] The terminal device obtains a first time interval;

[0119] The terminal device determines the transmission resources to be used for the next transmission of the other terminal device according to the resources of the PSCCH and / or the PSSCH, and the first time interval;

[0120] If the first resource belongs to the first resource set, and there is an overlap between the first resource and the transmission resources to be used for the next transmission of the other terminal device, then exclude the first resource from the first resource set.

[0121] For example, each transmission resource in the first resource set includes 4 subbands (one subband includes a plurality of physically contiguous physical resource blocks PRBs). For example, transmission resource 1 includes subbands 1, 2, 3, and 4 of the first time slot within the resource selection window, transmission resource 2 includes subbands 3, 4, 5, and 6 of the first time slot within the resource selection window, and transmission resource 3 includes subbands 5, 6, 7, and 8 of the first time slot within the resource selection window; if the next transmission of the other terminal device uses subband 3 of the first time slot within the resource selection window, then the terminal device excludes all the transmission resources that overlap with subband 3 of the first time slot from the first resource set, that is, excludes transmission resources 1 and 2.

[0122] Wherein, the first time interval is carried in the PSCCH of the other terminal device. Specifically, SCI is carried in the PSCCH of the other terminal device, and the first time interval is carried in the SCI.

[0123] Among them, the transmission resources used by the other terminal device for the next transmission can be the transmission resources for transmitting new data packets or the transmission resources for transmitting retransmitted data.

[0124] The resource selection methods provided in the above specific embodiments 1 to 4 are applicable to any terminal-to-terminal system, and in particular, are also applicable to the vehicle network system. Specific Embodiment 5

[0126] Please refer to Figure 11 , which is a module diagram of Specific Embodiment 5 of the terminal device in a vehicle network system of the present invention. The terminal device includes:

[0127] A listening module 210, configured to obtain a first resource set, where the resources in the first resource set are candidate transmission resources;

[0128] A selection module 220, configured to perform listening, and exclude unavailable resources from the first resource set according to the RSRP of the resources occupied by other transmitting terminals measured and the RSRP threshold value;

[0129] A transmission module 230, configured to select a resource from the first resource set for data transmission.

[0130] Specifically, the terminal device selects from the first resource set according to a certain criterion. For example, the transmission module 230 specifically includes:

[0131] A sorting module 231, configured to perform S-RSSI detection on the resources in the first resource set, and sort the corresponding resources according to the S-RSSI detection values according to the energy level, and put a part of the resources with the lowest energy into the second resource set; among them, the sorting module 231 performs S-RSSI detection on the resources in the first resource set, including performing S-RSSI detection on the resources in the listening window, and calculating the S-RSSI of the resources in the first resource set according to the S-RSSI detection result.

[0132] A determination module 232, configured to select a resource from the second resource set for data transmission. Optionally, the determination module 232 selects a resource from the second resource set with equal probability for data transmission.

[0133] Preferably, the device further includes a reselection module 240, configured to, after the selection module 220 excludes resources, when it is determined that the number of available resources in the first resource set is less than the threshold value, increase RSRP_thd by a certain value, such as 3 dB, and then call the listening module 210 to re-enter the resource listening and selection process.

[0134] Preferably, the first resource set is a resource set composed of resources within a resource selection window.

[0135] Preferably, the size of the candidate transmission resource is determined according to the data to be sent by the terminal device. Specific Embodiment Six

[0137] In Specific Embodiment Six of the resource selection method in a D2D system of the present invention, the listening module 110 and the transmission module 130 are the same as those in the above Specific Embodiment Five. The difference between Specific Embodiment Six and the above Specific Embodiment Five is that the selection module 220 is specifically configured to determine the difference between the transmission power of other sending terminals and the transmission power of the data to be sent by the terminal device, adjust the RSRP of the resources occupied by the measured other sending terminals according to the difference, or adjust the RSRP threshold according to the difference, and exclude unavailable resources from the first resource set according to the adjusted RSRP or the adjusted RSRP threshold. The specific implementation manners are as follows:

[0138] Example 1

[0139] Please refer to Figure 12 , the selection module 220 specifically includes:

[0140] An initial threshold value acquisition module 2211, configured to determine the threshold value of PSSCH-RSRP, that is, the first PSSCH-RSRP;

[0141] A threshold value adjustment module 2212, configured to adjust the first RSRP_thd according to the transmission power of the other sending terminals and the transmission power of the data to be sent by the terminal device to obtain a second RSRP_thd; wherein, the method for obtaining the transmission power of the other sending terminals can refer to the description of step 1212 in the above Specific Embodiment Two, and will not be repeated here;

[0142] A measurement module 2213, configured to measure the RSRP of the PSSCH scheduled by the PSCCH to obtain the first PSSCH-RSRP after detecting the PSCCH of the other sending terminals;

[0143] A first exclusion module 2214, configured to exclude unavailable resources in the first resource set according to the threshold value of the second PSSCH-RSRP and the first PSSCH-RSRP. Specifically, when the first PSSCH-RSRP of the PSSCH is greater than or equal to the second RSRP_thd, the occupied resources are excluded from the first resource set.

[0144] Optionally, the threshold adjustment module 2212 may also be configured to determine not to adjust RSRP_thd when the transmission power of the other terminal is greater than or equal to the transmission power of the data to be transmitted by the listening terminal.

[0145] Example 2

[0146] Please refer to Figure 13 , the selection module 220 specifically includes:

[0147] The initial measurement value acquisition module 2221 is configured to measure the reference signal of the PSSCH scheduled by the PSCCH after detecting the PSCCH of the other transmitting terminal, and obtain the first PSSCH-RSRP;

[0148] The measurement value adjustment module 2222 is configured to adjust the first PSSCH-RSRP according to the transmission power of the other transmitting terminal and the transmission power of the data to be transmitted by the terminal device, and obtain the second PSSCH-RSRP; specifically, the method for obtaining the transmission power of the other transmitting terminal may refer to the specific description in step 1212 of the second specific embodiment above, and will not be repeated here.

[0149] The threshold value acquisition module 2223 is configured to determine the first RSRP_thd of the PSSCH;

[0150] The second resource exclusion module 2224 is configured to exclude unavailable resources in the first resource set according to the first RSRP_thd and the second PSSCH-RSRP. Specifically, the second resource exclusion module 2224 is configured to exclude the resources occupied by the PSSCH in the first resource set when the second RSRP is greater than or equal to the first RSRP_thd.

[0151] Optionally, the measurement value adjustment module 2222 is further configured to determine not to adjust the first PSSCH-RSRP when the transmission power of the other terminal is greater than or equal to the transmission power of the data to be transmitted by the terminal device.

[0152] Example 3

[0153] Please refer to Figure 14 , in combination with the above Example 1 and Example 2, in the sixth specific embodiment of the present invention, the terminal device further includes:

[0154] The control module 240 is configured to limit the power control of the terminal device within a time window. Wherein, the time window can be obtained through network configuration or presetting.

[0155] Specifically, the control module 240 is specifically configured to control the terminal device not to perform power control within a time window, and power control can only be performed when transitioning from one time window to the next time window.

[0156] Specifically, the control module 240 can also be specifically configured to, within each time window, when the terminal device transmits data for the first time, power control can be performed according to the sidelink path loss, and no power control is performed during other transmissions within this time window. That is, the transmission power is not adjusted according to the sidelink path loss.

[0157] If there are any details not elaborated in the sixth specific implementation manner of the present invention, please refer to the second specific implementation manner above. Specific Implementation Manner Seven

[0159] Please refer to Figure 15 , which is a module diagram of the seventh specific implementation manner of the terminal device in a D2D system of the present invention. Among them, the listening module 210 and the transmission module 230 are the same as those in the fifth specific implementation manner above. The difference between the seventh specific implementation manner and the fifth specific implementation manner above is that the selection module 220 specifically includes:

[0160] The PSCCH measurement value acquisition module 2232 is configured to measure the PSCCH-RSRP of the PSCCH after detecting the PSCCH of the other transmitting terminal; optionally, the reference signal is the demodulation reference signal DMRS of the PSCCH.

[0161] The PSCCH threshold value acquisition module 2233 is configured to determine the PSCCH-RSRP threshold value; optionally, the threshold value is determined according to the priority information P1 in the SCI carried in the PSCCH and the priority P2 of the data to be transmitted by the terminal device. The specific determination method can refer to the description in the second specific implementation manner and will not be elaborated here.

[0162] The resource exclusion module 2234 determines that the measured PSCCH-RSRP is greater than or equal to the threshold value, and then excludes the resources occupied by the other transmitting terminal from the first resource set.

[0163] Preferably, the selection module 220 specifically further includes:

[0164] The power control module 2231 is configured to perform power control on the PSCCH in a broadcast manner. That is, the downlink path loss is considered in power control, and the sidelink path loss is not considered; or the PSCCH does not perform power control according to the sidelink path loss; or the PSCCH does not perform power control; or the PSCCH is transmitted at the maximum transmission power. Among them, the maximum transmission power can be the maximum transmission power supported by the terminal or the maximum transmission power configured by the network.

[0165] Preferably, the power control module 2231 is further specifically configured to perform power control on the PSSCH in a unicast or multicast manner. When the terminal performs power control in a unicast or multicast manner, the transmission power of the terminal can be determined according to the path loss of the downlink between the terminal and the network, or according to the path loss of the sidelink between the terminal and the receiving terminal, or determined according to both the path loss of the downlink and the path loss of the sidelink.

[0166] In the seventh specific embodiment of the present invention, power control is performed on the PSSCH in a unicast or multicast manner, and the transmission power of the PSCCH is determined in a broadcast manner, that is, power control is not performed on the PSCCH, or power control is performed on the PSCCH according to the downlink path loss. Therefore, determining whether the resource is available according to the measured PSCCH-RSRP will not cause misjudgment, and the situation of preempting the transmission resources of users with low transmission power can be avoided. For the details not described in the seventh specific embodiment, please refer to the third specific embodiment above, and no further description will be given here. Specific Embodiment Eight

[0168] Please refer to Figure 16 , which is a module diagram of the eighth specific embodiment of the terminal device in a vehicle-to-everything (V2X) system of the present invention. Among them, the transmission module 230 is the same as that in the fifth specific embodiment above. The difference between the seventh specific embodiment and the fifth specific embodiment above is that the listening module 210 specifically includes:

[0169] A configuration information acquisition module 2141, configured to acquire configuration information, where the configuration information is used to determine the correspondence between the transmission power level and the resource pool; optionally, the configuration information is the configuration information sent by the network or pre-configured information.

[0170] A resource acquisition module 2142, configured to acquire the first resource set within the resource pool corresponding to the transmission power of the terminal device.

[0171] The selection module 220 is specifically configured to determine that the measured RSRP of the PSSCH scheduled by the resources occupied by the other transmitting terminals is greater than or equal to RSRP_thd, and then exclude the resource from the first resource set. In the eighth specific embodiment, the existing resource listening and selection method can be used, without the need to adjust the RSRP_thd threshold or the measured PSSCH-RSRP.

[0172] Optimally, the listening module 210 further includes:

[0173] A restart module 2143, configured to switch the resource pool corresponding to the terminal device and call the listening module 210 and the selection module 220 to perform listening and resource selection in the switched resource pool when the transmission power of the terminal device changes, resulting in a change in the corresponding resource pool.

[0174] Embodiment VIII of the present invention divides the resource pool according to the power level, so that the transmission powers of the terminals in the same resource pool are at the same power level and not much different, thereby avoiding the influence on the listening result due to a large difference in transmission power and preventing the situation of preempting the transmission resources of users with low transmission power. For details not described in Embodiment VIII, please refer to Embodiment IV, which will not be elaborated here.

[0175] Preferably, in the above Embodiments V to VIII, the selection module 220 further includes:

[0176] A determination module 2251, configured to determine a first time interval;

[0177] A resource determination module 2252, configured to enable the terminal device to determine the transmission resources to be used for the next transmission of the other terminal device according to the resources of the PSCCH and / or the PSSCH and the first time interval;

[0178] An overlapping resource exclusion module 2253, if the first resource belongs to the first resource set and there is an overlap between the first resource and the transmission resources to be used for the next transmission of the other terminal device, then exclude the first resource from the first resource set.

[0179] Optimally, the selection module 220 is further configured to obtain the first time interval from the PSCCH of the other terminal device, and the first time interval is carried in the PSCCH of the other terminal device. Specifically, an SCI is carried in the PSCCH of the other terminal device, and the first time interval is carried in the SCI.

[0180] Among them, the transmission resources to be used for the next transmission of the other terminal device may be the transmission resources for transmitting new data packets or the transmission resources for transmitting retransmitted data. Embodiment IX

[0182] Please refer to Figure 17, A schematic structural diagram of a terminal device 300 provided in the ninth specific embodiment of the present invention. The terminal device 300 includes: an antenna 310, a radio frequency device 320, and a baseband device 330. In the uplink direction, the radio frequency device 320 receives the information uploaded by the terminal device through the antenna 310 and sends the received information to the baseband device 330 for processing. In the downlink direction, the baseband device 330 sends the processed information to the radio frequency device 320. After processing the received information, the radio frequency device 320 sends it out through the antenna 310.

[0183] The baseband device 330 executes the steps of a resource selection method in a vehicle networking system provided in the first to fourth specific embodiments above.

[0184] Specifically, the baseband device 330 includes: a processor 331, a memory 332, and a network interface 333. The processor 331 calls the program in the memory 332 and executes the steps of an uplink control channel transmission method provided in the first specific embodiment above. The network interface 333 exchanges information with the radio frequency device 320 and sends the signal processed by the processor 331 to the radio frequency device 320.

[0185] The processor 331 can be an independent component or a collective term for multiple processing elements. For example, it can be a CPU, an ASIC, or one or more integrated circuits configured to implement the above methods, such as at least one microprocessor DSP, or at least one programmable gate array FPGA, etc.

[0186] The present invention is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks. The program can be stored in a computer-readable storage medium, and the storage medium can include: read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), magnetic disk, or optical disc, etc.

[0187] The above specific embodiments illustrate but do not limit the present invention, and those skilled in the art can design multiple alternative examples within the scope of the claims. Those skilled in the art should realize that appropriate adjustments, modifications, etc. can be made to the specific implementation solutions without violating the scope of the present invention as defined in the appended claims. Therefore, any modifications and changes made in accordance with the spirit and principles of the present invention are within the scope of the present invention as defined in the appended claims.

Claims

1. A method for resource selection in a terminal-to-terminal system, characterized in that, The method includes: The terminal device obtains configuration information, where the configuration information is used to determine the correspondence between the transmission power level and the resource pool; The terminal device obtains a first resource set within the resource pool corresponding to the transmission power of the terminal device, where the resources in the first resource set are candidate transmission resources; The terminal device performs listening, and excludes unavailable resources from the first resource set according to the RSRP of the resources occupied by other transmitting terminals measured and the RSRP threshold; The terminal device selects a resource from the first resource set for data transmission; Among them, the terminal device performs listening, and excludes unavailable resources from the first resource set according to the RSRP of the resources occupied by other transmitting terminals measured and the RSRP threshold, including: the terminal device determines the difference between the transmission power of other transmitting terminals and the transmission power of the data to be transmitted by the terminal device, adjusts the RSRP of the resources occupied by other transmitting terminals measured according to the difference, or adjusts the RSRP threshold according to the difference, and excludes unavailable resources from the first resource set according to the adjusted RSRP or the adjusted RSRP threshold; among them, when the terminal device detects that the transmission power of other transmitting terminals is less than the transmission power of the data to be transmitted by the terminal device, it adjusts the RSRP or the RSRP threshold, where the adjusted RSRP threshold is the sum of the RSRP threshold before adjustment and A, where the parameter A is the difference between the transmission power of the other transmitting terminals and the transmission power of the data to be transmitted by the terminal device, and the adjusted RSRP is the sum of the RSRP before adjustment and A; The method further includes: the terminal device determines the RSRP threshold according to the priority information carried in the PSCCH of the other transmitting terminals and the priority information of the data to be transmitted by the terminal device.

2. The method according to claim 1, wherein The RSRP threshold determined by the terminal device includes a first PSSCH-RSRP threshold, and the step of "the terminal device performs listening, and excludes unavailable resources from the first resource set according to the RSRP of the resources occupied by other transmitting terminals measured and the RSRP threshold" includes: Adjust the first PSSCH-RSRP threshold according to the difference between the transmission power of the other transmitting terminals and the transmission power of the data to be transmitted by the terminal device to obtain a second PSSCH-RSRP threshold, where the second PSSCH-RSRP threshold = the first PSSCH-RSRP threshold + A; After the terminal device detects the PSCCH of the other transmitting terminals, it measures the RSRP of the PSSCH scheduled by the PSCCH to obtain a first PSSCH-RSRP; If the first PSSCH-RSRP is greater than or equal to the second PSSCH-RSRP threshold, exclude the resources occupied by the other transmitting terminals from the first resource set.

3. The method according to claim 1, wherein The RSRP threshold value determined by the terminal device includes a first PSSCH-RSRP threshold value. The step of "the terminal device performs listening, and based on the RSRP of the resources occupied by other transmitting terminals measured and the RSRP threshold value, excludes unavailable resources from the first resource set" includes: After the terminal device detects the PSCCH of the other transmitting terminal, it measures the RSRP of the PSSCH scheduled by the PSCCH to obtain a first PSSCH-RSRP; According to the difference between the transmission power of the other transmitting terminal and the transmission power of the data to be transmitted by the terminal device, the first PSSCH-RSRP is adjusted to obtain a second PSSCH-RSRP, where the second PSSCH-RSRP = the first PSSCH-RSRP + A; If the second PSSCH-RSRP is greater than or equal to the first PSSCH-RSRP threshold value, the resources occupied by the other transmitting terminal are excluded from the first resource set.

4. The method according to any one of claims 1 to 3, characterized in that, The method further includes: The terminal device determines the transmission power of the other transmitting terminal according to the first indication information carried in the PSCCH.

5. The method according to claim 1, wherein The RSRP threshold value determined by the terminal device includes a PSCCH-RSRP threshold value; the step of "the terminal device performs listening, and based on the RSRP of the resources occupied by other transmitting terminals measured and the RSRP threshold value, excludes unavailable resources from the first resource set" further includes: After the terminal device detects the PSCCH of the other transmitting terminal, it measures the PSCCH-RSRP of the PSCCH; When the terminal device detects that the transmission power of the other transmitting terminal is greater than or equal to the transmission power of the data to be transmitted by the terminal device, if the PSCCH-RSRP is greater than or equal to the PSCCH-RSRP threshold value, the resources occupied by the other transmitting terminal are excluded from the first resource set.

6. The method according to claim 5, wherein The method further includes: The PSCCH of the other transmitting terminal is power-controlled in a broadcast manner.

7. The method according to claim 5, wherein The method further includes: The PSSCH of the other transmitting terminal is power-controlled in a unicast or multicast manner.

8. The method according to claim 1, characterized in that, The RSRP threshold value determined by the terminal device includes a PSSCH-RSRP threshold value. The step of "the terminal device performs listening, and based on the RSRP of the resources occupied by other transmitting terminals measured and the RSRP threshold value, excludes unavailable resources from the first resource set" includes: After the terminal device detects the PSCCH of the other transmitting terminal, it measures the RSRP of the PSSCH scheduled by the PSCCH to obtain a PSSCH-RSRP; When the terminal device detects that the transmission power of the other transmitting terminal is greater than or equal to the transmission power of the data to be transmitted by the terminal device, if the PSSCH-RSRP is greater than or equal to the PSSCH-RSRP threshold value, the resources occupied by the other transmitting terminal are excluded from the first resource set.

9. The method according to any one of claims 2, 3, 5 or 8, characterized in that The step of "excluding the resources occupied by the other sending terminals in the first resource set" includes: The terminal device obtains a first time interval; The terminal device determines the transmission resources to be used for the next transmission of the other sending terminal according to the resources of the PSCCH and / or PSSCH and the first time interval; If there is an overlap between the first resources in the first resource set and the transmission resources to be used for the next transmission of the other sending terminal, the first resources are excluded from the first resource set.

10. The method according to claim 9, wherein The method further includes: the first time interval is carried in the PSCCH of the other sending terminal.

11. A terminal device in a terminal-to-terminal system, characterized in that, The terminal device includes: A listening module (210), configured to obtain configuration information, where the configuration information is used to determine the correspondence between the transmission power level and the resource pool, and obtain a first resource set within the resource pool corresponding to the transmission power of the terminal device, where the resources in the first resource set are candidate transmission resources; A selection module (220), configured to perform listening by the terminal device, and exclude unavailable resources from the first resource set according to the RSRP of the resources occupied by the measured other sending terminal and the RSRP threshold; A transmission module (230), configured to select a resource from the first resource set for data transmission; Wherein, the selection module (220) is specifically configured to determine the difference between the transmission power of the other sending terminal and the transmission power of the data to be sent by the terminal device, adjust the RSRP of the resources occupied by the measured other sending terminal according to the difference, or adjust the RSRP threshold according to the difference, and exclude unavailable resources from the first resource set according to the adjusted RSRP or the adjusted RSRP threshold; wherein, when the selection module (220) detects that the transmission power of the other sending terminal is less than the transmission power of the data to be sent by the terminal device, the RSRP or the RSRP threshold is adjusted, wherein the adjusted RSRP threshold is the sum of the RSRP threshold before adjustment and A, and the parameter A is the difference between the transmission power of the other sending terminal and the transmission power of the data to be sent by the terminal device, and the adjusted RSRP is the sum of the RSRP before adjustment and A; Wherein, the terminal device further includes: an RSRP threshold obtaining module (2223), configured to determine the RSRP threshold according to the priority information carried in the PSCCH of the other sending terminal and the priority information of the data to be transmitted by the terminal device.

12. The terminal device according to claim 11, characterized in that, The RSRP threshold determined by the RSRP threshold obtaining module (2223) includes a first PSSCH-RSRP threshold of the PSSCH. The selection module (220) specifically includes: A threshold adjustment module (2212) for adjusting the first PSSCH-RSRP threshold according to the difference between the transmission power of the other transmitting terminal and the transmission power of the data to be transmitted by the terminal device, to obtain a second PSSCH-RSRP threshold, where the second PSSCH-RSRP threshold = the first PSSCH-RSRP threshold + A; A measurement module (2213) for measuring the RSRP of the PSSCH scheduled by the PSCCH to obtain a first PSSCH-RSRP after detecting the PSCCH of the other transmitting terminal; A first resource exclusion module (2214) for excluding the resources occupied by the other transmitting terminal from the first resource set when the first PSSCH-RSRP is greater than or equal to the second PSSCH-RSRP threshold; 13. The terminal device according to claim 11, wherein The RSRP threshold determined by the RSRP threshold obtaining module (2223) includes a first PSSCH-RSRP threshold; the selection module (220) specifically includes: An initial measurement value obtaining module (2221) for measuring the PSSCH scheduled by the PSCCH to obtain a first PSSCH-RSRP after detecting the PSCCH of the other transmitting terminal; A measurement value adjustment module (2222) for adjusting the first PSSCH-RSRP according to the difference between the transmission power of the other transmitting terminal and the transmission power of the data to be transmitted by the terminal device, to obtain a second PSSCH-RSRP, where the second PSSCH-RSRP = the first PSSCH-RSRP + A; A second resource exclusion module (2224) for excluding the resources occupied by the other transmitting terminal from the first resource set when the second PSSCH-RSRP is greater than or equal to the first PSSCH-RSRP threshold; 14. The terminal device according to any one of claims 11 to 13, characterized in that: The selection module (220) is further configured to determine the transmission power of the other transmitting terminal according to the first indication information carried in the PSCCH.

15. The terminal device according to claim 11, characterized in that, The RSRP threshold determined by the RSRP threshold obtaining module (2223) includes a PSCCH-RSRP threshold of the PSCCH; the selection module (220) specifically includes: A PSCCH measurement value obtaining module (2232) for measuring the PSCCH-RSRP of the PSCCH after detecting the PSCCH of the other transmitting terminal; A third resource exclusion module (2234) for excluding the resources occupied by the other transmitting terminal from the first resource set when the PSCCH-RSRP is greater than or equal to the PSCCH-RSRP threshold in the case where the transmission power of the other transmitting terminal is greater than or equal to the transmission power of the data to be transmitted by the terminal device; 16. The terminal device according to claim 15, wherein The selection module (220) further includes: A power control module (2231) for power controlling the transmission power of the PSCCH in a broadcast manner.

17. The terminal device according to claim 15, characterized in that, The selection module (220) further includes: A power control module (2231) for power controlling the transmission power of the PSSCH in a unicast or multicast manner.

18. The terminal device according to claim 11, wherein, The RSRP threshold value obtained by the RSRP threshold value acquisition module (2223) includes a PSSCH-RSRP threshold value; the selection module (220) specifically includes: An RSRP measurement module (2242) for measuring the RSRP of the PSSCH scheduled by the PSCCH to obtain the PSSCH-RSRP after detecting the PSCCH of the other transmitting terminal. A fourth resource exclusion module (2243) for excluding the resources occupied by the other transmitting terminal from the first resource set when it is detected that the transmission power of the other transmitting terminal is greater than or equal to the transmission power of the data to be transmitted by the terminal device and the PSSCH-RSRP is greater than or equal to the PSSCH-RSRP threshold value.

19. The terminal device according to any one of claims 12, 13, 15 or 18, characterized in that, The selection module (220) further includes: A determination module (2251) for determining a first time interval. A resource determination module (2252) for the terminal device to determine the transmission resources to be used by the other transmitting terminal for the next transmission according to the resources of the PSCCH and / or PSSCH and the first time interval. An overlapping resource exclusion module (2253) for excluding the first resource from the first resource set if the first resource belongs to the first resource set and there is an overlap between the first resource and the transmission resources to be used by the other transmitting terminal for the next transmission.

20. The terminal device according to claim 19, wherein The selection module (220) is further configured to obtain the first time interval from the PSCCH of the other transmitting terminal, and the first time interval is carried in the PSCCH of the other transmitting terminal.

21. A terminal device, the terminal device comprising: A processor, a memory, characterized in that: an uplink control channel transmission program stored on the memory and executable on the processor, and when the processor executes the uplink control channel transmission program, implementing the resource selection method according to any one of claims 1 to 10 above.

22. A computer-readable storage medium, characterized in that, A resource selection program is stored on the computer-readable storage medium, and when the resource selection program is executed by the processor, implementing the resource selection method according to any one of claims 1 to 10 above.

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