WO2020243971A1 - 一种车联网系统中的资源选取方法及其用户设备 - Google Patents

一种车联网系统中的资源选取方法及其用户设备 Download PDF

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Publication number
WO2020243971A1
WO2020243971A1 PCT/CN2019/090437 CN2019090437W WO2020243971A1 WO 2020243971 A1 WO2020243971 A1 WO 2020243971A1 CN 2019090437 W CN2019090437 W CN 2019090437W WO 2020243971 A1 WO2020243971 A1 WO 2020243971A1
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WIPO (PCT)
Prior art keywords
rsrp
terminal device
resource
pssch
pscch
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PCT/CN2019/090437
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English (en)
French (fr)
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WO2020243971A8 (zh
Inventor
赵振山
卢前溪
林晖闵
Original Assignee
广东欧珀移动通信有限公司
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Application filed by 广东欧珀移动通信有限公司 filed Critical 广东欧珀移动通信有限公司
Priority to PCT/CN2019/090437 priority Critical patent/WO2020243971A1/zh
Priority to CN201980093622.4A priority patent/CN113545142A/zh
Publication of WO2020243971A1 publication Critical patent/WO2020243971A1/zh
Publication of WO2020243971A8 publication Critical patent/WO2020243971A8/zh
Priority to US17/539,594 priority patent/US20220095281A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/383—TPC being performed in particular situations power control in peer-to-peer links
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present invention relates to the field of communication technology, in particular to the field of vehicle networking technology.
  • D2D Direct terminal-to-terminal
  • SL Sidelink
  • 3GPP (3rd Generation Partnership Project) defines two transmission modes for car networking systems: one is that the base station allocates the transmission resources of the terminal; the other is that the vehicle-mounted terminal selects transmission in the resource pool Resources for transmission can be selected by means of interception or selected randomly.
  • NR-V2X which is based on the evolution of the New Radio (NR, New Radio) system of the 5G (5 Generation) mobile communication system
  • the V2X car networking wireless communication technology has proposed changes in data interaction between vehicles.
  • High requirements such as higher throughput, lower latency, higher reliability, larger coverage, and more flexible resource allocation.
  • it also introduces unicast and multicast transmission methods, power control mechanisms, and side-line feedback channels to improve reliability.
  • the transmitting terminal In order to allow more terminals to receive data, the transmitting terminal usually uses the maximum transmission power to transmit the data.
  • the transmitting end terminal can adjust the transmission power according to the side link status, so as to achieve the purpose of energy saving and reduce interference to other transmission links.
  • the transmitting terminal can reduce the transmission power under certain conditions, which may cause other terminals to misjudge that the transmission resources used by the transmitting terminal are available during the listening process, thereby preempting the transmission resources of users with low transmission power. Problems that interfere with its transmission.
  • the technical problem to be solved by the present invention is to provide a resource selection method and terminal equipment for terminal-to-terminal systems that can reduce transmission interference.
  • a method for resource selection in a terminal-to-terminal system includes: a terminal device obtains a first resource set, wherein the resources in the first resource set are candidate transmission resources; the terminal device performs interception, According to the measured RSRP and RSRP thresholds of resources occupied by other sending terminals, unavailable resources are excluded from the first resource set; the terminal device selects a resource from the first resource set for data transmission.
  • a terminal device in a terminal-to-terminal system includes: a listening module for acquiring a first resource set, wherein the resources in the first resource set are candidate transmission resources; and the selection module uses Perform listening on the terminal device, and exclude unavailable resources from the first resource set according to the measured RSRP and RSRP thresholds of resources occupied by other sending terminals; the transmission module is configured to Select a resource from the resource collection for data transmission.
  • a terminal device comprising: a processor and a memory, characterized in that: the memory stores an uplink control channel transmission program that can be run on the processor, and the processor executes the uplink control When channel transmission procedures, any one of the resource selection methods described is implemented.
  • a computer-readable storage medium wherein a resource selection program is stored on the computer-readable storage medium, and when the resource selection program is executed by a processor, any one of the resource selection methods is implemented.
  • the beneficial effect of the present invention is that in a terminal-to-terminal system, because other transmitting terminals may perform power control, their reference signal RSRP may be relatively low, and the resource may be misjudged that the resource is available. Therefore, according to the measured occupation of other transmitting terminals
  • the RSRP and RSRP thresholds of the resources of exclude unavailable resources from the first resource set, thereby compensating for the misjudgment of whether the transmission resources are available due to the difference in transmission power, thereby avoiding preempting the transmission resources of low transmission power terminals, Cause interference to its transmission.
  • FIG. 1 is a scene diagram of the application of the specific embodiment of the present invention.
  • FIG. 2 is a flowchart of a specific implementation manner of a method for selecting resources in a terminal-to-terminal system according to the present invention.
  • Fig. 3 is a flowchart of a second specific implementation manner of a resource selection method in a terminal-to-terminal system of the present invention.
  • Fig. 4 is a flowchart of mode one in the second embodiment.
  • FIG. 5 is a flowchart of the second method in the second embodiment.
  • FIG. 6 is a flowchart of the third mode in the second embodiment.
  • FIG. 7 is a flowchart of the third embodiment of a method for selecting resources in a terminal-to-terminal system according to the present invention.
  • FIG. 8 shows that PSCCH and PSSCH occupy different time domain resources in the third embodiment.
  • FIG. 9 is a flowchart of specific implementation manner 4 of a resource selection method in a terminal-to-terminal system of the present invention.
  • Fig. 10 is a schematic diagram of a resource pool in the fourth embodiment.
  • FIG. 11 is a block diagram of a fifth specific implementation manner of a terminal device in a terminal-to-terminal system of the present invention.
  • Fig. 12 is a flowchart of Example 1 in the fifth embodiment.
  • Fig. 13 is a flowchart of Example 2 in the fifth embodiment.
  • FIG. 14 is a flowchart of Example 3 in the fifth embodiment.
  • FIG. 15 is a block diagram of a seventh specific implementation manner of a terminal device in a terminal-to-terminal system of the present invention.
  • FIG. 16 is a block diagram of the eighth specific implementation manner of a terminal device in a terminal-to-terminal system of the present invention.
  • FIG. 17 is a schematic diagram of additional modules of the further optimized selection modules in the fifth to eighth specific embodiments.
  • FIG. 18 is a schematic structural diagram of a terminal device according to the ninth embodiment of the present invention.
  • the specific embodiments of the present invention disclose a resource selection method applied to a car networking system and its terminal equipment.
  • the system architecture used in the following specific embodiments of the present invention is: in NR-V2X, the transmitting terminal needs to select transmission resources before transmitting data. Because NR-V2X not only has the communication mode of broadcast transmission in the car networking system, it also introduces the communication mode of unicast transmission and multicast transmission, as well as the power control mechanism. Since in unicast transmission and multicast transmission, the terminal will perform power control, which can reduce the transmission power, which will cause other transmitting terminals to misunderstand the transmission resources used by the terminal performing power control when selecting transmission resources through interception If it is available, the problem of seizing the transmission resources of the low-transmission power terminal and disturbing its transmission occurs. Therefore, when other sending terminals select transmission resources, they need to identify and exclude the transmission resources to avoid large transmission power differences between different terminals and cause greater transmission interference.
  • UE1 and UE2 are unicast transmission, and UE3 is broadcast transmission.
  • power control is performed. Because the distance between UE1 and UE2 is very close, the transmission power of UE1 will be very low, for example, the transmission power of UE1 is 10dBm.
  • UE3 When UE3 is listening, because the transmission power of UE1 is low, UE3 measures that the PSSCH-RSRP of UE1 is very low, and thus considers that the interference on the transmission resource used by UE1 is very low, and the transmission resource is an available resource.
  • UE3 selects the 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 use the maximum power (for example, 23dBm) to transmit, so UE3’s signal is generated by UE2’s reception Interference causes UE2 to fail to receive data from UE1.
  • the maximum power for example, 23dBm
  • FIG. 2 is a flowchart of a specific implementation manner of a resource selection method in a terminal-to-terminal system of the present invention, and the method is applied to a terminal device.
  • the method includes:
  • Step 110 The terminal device obtains a first resource set, where the resources in the first resource set are candidate transmission resources;
  • Step 120 The terminal device performs listening, and excludes unavailable resources from the first resource set according to the measured RSRP and RSRP threshold of resources occupied by other sending terminals;
  • Step 130 The terminal device selects a resource from the first resource set for data transmission.
  • step 130 may specifically include:
  • Step 131 The terminal device performs S-RSSI (Sidelink Received Signal Strength Indicator, side-line received signal field strength indicator) detection on the resources in the first resource set, and performs corresponding resources according to the energy level according to the S-RSSI detection value Sorting, putting a part of the resources with the lowest energy (for example, 20% of the lowest energy) resources into the second resource set; wherein, the terminal device performs S-RSSI detection on the resources in the first resource set, including: The resources in the listening window perform S-RSSI detection, and the S-RSSI of the resources in the first resource set is calculated according to the S-RSSI detection result.
  • S-RSSI idelink Received Signal Strength Indicator, side-line received signal field strength indicator
  • Step 132 The terminal selects a resource from the second resource set for data transmission.
  • the terminal selects a resource from the second resource set with a moderate probability for data transmission.
  • the terminal device performing the interception raises the RSRP threshold by a certain value, such as 3dB, and then repeats the resource elimination process in step 120 above.
  • the first resource set is a resource set composed of resources in a resource selection window.
  • the size of the candidate transmission resource is determined according to the data to be sent by the terminal device.
  • step 110 and step 130 are the same as the first specific embodiment described above.
  • the second embodiment differs from the first embodiment above in 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 transmitted by the terminal device, according to the The difference adjusts the measured RSRP of the resources occupied by other sending terminals, or adjusts the RSRP threshold according to the difference, and according to the adjusted RSRP or the adjusted RSRP threshold, the resources are not available Excluded from the first resource set.
  • the specific implementation methods are:
  • this step 120A specifically includes:
  • Step 1211 Determine the PSSCH-RSRP threshold, that is, the first PSSCH-RSRP threshold (RSRP_thd is used below to represent the PSSCH-RSRP threshold); specifically, it may be based on the detected PSCCH of the other sending terminal
  • the priority information P1 carried in the terminal device and the priority information P2 of the data to be transmitted by the terminal device are used to determine the first RSRP_thd; for example, the mapping relationship between preconfiguration or network configuration priority and PSSCH-RSRP threshold ,
  • the terminal device that performs interception can determine the RSRP_thd of the PSSCH by looking up the mapping relationship according to the P1 of the other sending terminal and its own P2;
  • 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 a second RSRP_thd;
  • Step 1213 After detecting the PSCCH of the other transmitting terminal, the terminal device measures 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 sequence , Which can be before step 1211 or before step 1212;
  • Step 1214 According to the threshold value of the second PSSCH-RSRP and the first PSSCH-RSRP, exclude unavailable resources in the first resource set. Specifically, when the first PSSCH-RSRP of the PSSCH is greater than or equal to the second RSRP_thd, resources occupied by the other transmitting terminal are excluded from the first resource set.
  • the transmission power of the other terminal may be determined according to the information carried in the PSCCH.
  • the side link control information SCI carried in the PSCCH the SCI carries first indication information
  • the first indication information is used to determine the transmission power of other transmitting terminals.
  • the terminal device adjusts the first RSRP_thd according to the first indication information and the transmission power of the data to be sent of the terminal device.
  • the transmission power indication information may be any one of the following information:
  • the first type is information used to indicate the transmit power of the other transmitting terminal, for example, the transmit power of the terminal is quantized, and the quantized transmit power information is carried in the SCI;
  • 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 as 0 dBm. If the transmission power of the terminal is between [0, 23] dBm, it is processed in a round-up manner. For example, if the transmission power of the terminal is 5.3 dBm, it is quantized as 6 dBm; if the transmission power of the terminal is 6.8 dBm, it is quantized as 7 dBm, and so on. Then the quantized terminal transmit power is an integer between [0, 23], that is, 5 bits are required to represent any quantized transmit power value.
  • the transmit power of the terminal can be determined according to the 5-bit transmit power indication information carried in the SCI
  • the second type is power level identification, for example, the transmission power is divided into different levels, and the corresponding transmission power can be determined according to the power level identification;
  • the terminal transmission power is less than or equal to 0dBm, it is recorded as the first level, if the transmission power is at (0,1]dBm, it is recorded as the second level, if the transmission power is at (1,2]dBm, it is recorded as the third level, if If the power is at (2, 3] dBm, it is recorded as the fourth level, and so on. If the transmission power is at (22, 23] dBm, it is recorded as the twenty-fourth level, where (A, B) means the transmission power is greater than A, Less than or equal to B. Therefore, 5 bits are required to indicate any power level.
  • the transmit power level of the terminal can be determined according to the 5-bit transmit power indication information carried in the SCI.
  • the largest transmission power in the level is recorded as the transmission power of the terminal.
  • the power level of a terminal is the third level, then 2dBm is determined as the transmission power of the terminal.
  • the third type is information used to indicate the difference between the transmit power of the terminal and the first power; where the first power may be at least one of the following:
  • the maximum transmit power of the terminal for example, the maximum transmit power of the terminal is 23dBm; or,
  • a pre-configured power value for example, a pre-defined power of 23 dBm through the protocol; or
  • a power determined according to the parameter information carried in the SCI for example, a threshold value determined according to the priority information in the SCI, for example, a threshold value of RSRP determined according to the priority.
  • the power difference information can be quantized or graded, and the specific quantization method or graded method can refer to the method in the first or second method, which will not be repeated here.
  • the listening terminal if the listening terminal detects that the transmission power of other terminals 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 RSRP_thd.
  • UE1 can detect the PSCCH of other transmitting terminal UE3 and learn that its transmission power is 23dBm, which is 10dBm greater than its own transmission power, then UE1 does not gate RSRP during the listening process. The limit is adjusted.
  • UE3 can detect the PSCCH of other transmitting terminal UE1 and learn that its transmission power PtUE1 is 10 dBm, and UE3's own transmission power PtUE3 is 23 dBm.
  • UE3 determines the first PSSCH-RSRP threshold RSRP_thd1.
  • RSRP_thd2 RSRP_thd1+A
  • 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 of the terminal device.
  • UE3 measures the PSSCH-RSRP1 of the other sending device UE1.
  • the PSSCH-RSRP1 is compared with the RSRP_thd2, and it is greater than or equal to the RSRP_thd2, then the transmission resource used by the UE1 is excluded. If it is lower than the RSRP_thd2, the transmission resource used by the UE1 is considered available.
  • this step 120 specifically includes:
  • Step 1221 After detecting the PSCCH of the other transmitting terminal, the terminal device measures the reference signal of the PSSCH scheduled by the PSCCH to obtain the first PSSCH-RSRP;
  • Step 1222 Adjust the first PSSCH-RSRP to obtain a second 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; specifically, the transmission of the other transmitting terminal
  • the transmission of the other transmitting terminal For the method of obtaining the power, refer to the specific description of step 1212 above, which will not be repeated here.
  • Step 1223 Determine the first RSRP_thd of the PSSCH; specifically, it may be determined based on the detected priority information P1 carried in the PSCCH of the other sending terminal and the priority information P2 of the data to be transmitted of the terminal device
  • the first RSRP_thd it should be noted that this step is not limited to this sequence, and it can be before step 1221 or before step 1222.
  • Step 1224 According to the first RSRP_thd and the second PSSCH-RSRP, exclude unavailable resources in the first resource set. Specifically, when the second RSRP is greater than or equal to the first RSRP_thd, resources occupied by the other sending terminal are excluded from the first resource set.
  • the listening terminal does not adjust the PSSCH-RSRP.
  • UE1 can detect the PSCCH of other transmitting terminal UE3 and learn that its transmission power is 23dBm, which is 10dBm greater than its own transmission power, then UE1 does not measure the PSCCH during the listening process.
  • the PSSCH-RSRP of UE3 is adjusted.
  • UE3 For example, as shown in Figure 1, suppose that UE3 is listening, UE1 transmit power PtUE1 is 10dBm, UE3 transmit power PtUE3 is 23dBm.
  • the UE3 determines the first RSRP threshold RSRP_thd to be 4dB according to the priorities P1 and P2.
  • UE3 measures the first PSSCH-RSRP1 of UE1 to be 5dB.
  • the PSSCH-RSRP2 is compared with the RSRP_thd, and it is greater than or equal to the RSRP_thd, then the transmission resource used by the UE1 is excluded. If it is lower than the RSRP_thd, the transmission resource used by the UE1 is considered available.
  • the method further includes:
  • Step 140 Limit the power control of the terminal device in a time window.
  • the time window can be obtained through network configuration or preset methods.
  • the step 140 may be: controlling the terminal device not to perform power control within a time window, and power control can be performed only when the time window is from one time window to the next time window.
  • step 140 may also be: in each time window, when the terminal device transmits data for the first time, power control may be performed according to the side link path loss, and during other transmissions within the time window, no power control may be performed. Power Control. That is, the transmission power is not adjusted according to the side link 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 set forth in step 1212 of the second embodiment.
  • the terminal device that performs interception detects the PSCCH, it will measure the PSCCH-scheduled PSSCH reference signal (such as RSRP), and if the measured RSRP is greater than or equal to the RSRP threshold, then The resource is considered unavailable and the resource needs to be excluded.
  • PSCCH-scheduled PSSCH reference signal such as RSRP
  • Adjust the RSRP_thd to obtain the adjustment of the measured PSSCH-RSRP, and exclude the resources occupied by other terminals with larger transmission power differences from the first resource set, thereby compensating for the transmission power difference caused by the transmission Misjudgment of whether the resource is available, so as to avoid preempting the transmission resources of the low-transmission power terminal and causing interference to its transmission.
  • FIG. 7 is a flowchart of the third embodiment of a method for resource selection in a terminal-to-terminal D2D system of the present invention.
  • step 110 and step 130 are the same as those in the first embodiment.
  • step 120 specifically includes:
  • Step 1233 After detecting the PSCCH of the other transmitting terminal, the terminal device measures the PSCCH-RSRP of the PSCCH; optionally, the reference signal is the demodulation reference signal DMRS of the PSCCH;
  • Step 1234 Determine the PSCCH-RSRP threshold (PSCCH-RSRP_thd); optionally, the threshold is based on priority information P1 in the SCI carried in the PSCCH, and the priority of the data to be sent by the terminal device If P2 is determined, the specific decision method can refer to the description in the second embodiment, which will not be repeated here;
  • Step 1235 It is determined that the measured PSCCH-RSRP is greater than or equal to the PSCCH-RSRP threshold, and the resources occupied by the other sending terminals are excluded from the first resource set. That is, when the PSCCH-RSRP is greater than or equal to the threshold, the transmission resource occupied by the other terminal equipment is considered unavailable, otherwise it is considered available.
  • this step 120 further includes:
  • Step 1231 the PSCCH of the other terminal equipment performs power control according to the broadcast mode; that is, the downlink path loss is considered in the power control, and the side travel path loss is not considered; or the PSCCH does not perform power control based on the path loss of the side travel link; or PSCCH does not perform power control; or PSCCH is transmitted with maximum transmission power.
  • the maximum transmission power may be the maximum transmission power that the terminal can support, or the maximum transmission power configured by the network.
  • this step 120 further includes:
  • Step 1232 the PSSCH of the other terminal equipment performs power control in a unicast or multicast manner. That is, the downlink path loss and/or the side path loss are considered in the power control.
  • the transmit power of the terminal can be determined according to the downlink path loss between the terminal and the network, or according to the side transmission between the terminal and the receiving terminal.
  • the path loss of the link is determined, or based on the path loss of the downlink and the path loss of the side link at the same time.
  • PSCCH and PSSCH can use different time domain resources for data transmission. Since the PSCCH is transmitted using the maximum transmission power, and the PSSCH performs power control according to the side link path loss, the PSCCH and the PSSCH can use different time domain resources for transmission. Among them, PSCCH and PSSCH may be located in the same or different time slots/subframes. As shown in Figure 8, Pt-1 ⁇ Pt-max, Pt-max represents the maximum transmission power, and Pt-1 represents the transmission power determined according to the side link path loss.
  • the listening terminal device needs to detect the PSCCH of other sending terminals, obtain the transmission resource of the PSSCH according to the PSCCH, and measure the PSSCH-RSRP reference signal PSSCH-RSRP, and compare it with the RSRP threshold to determine whether the resource used by the PSSCH Available.
  • the power control reduces the PSCCH transmission range or reduces the PSSCH-RSRP measurement value, other terminals cannot detect that the terminal device has occupied the transmission resource, and thus misjudge that the resource is available.
  • power control is performed on the PSSCH in a unicast or multicast manner, and the transmission power is determined on the PSCCH 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, confirming whether the resource is available according to the measured PSCCH-RSRP will not lead to misjudgment and avoid the situation of preempting the transmission resources of users with low transmission power.
  • step 130 is the same as the first embodiment.
  • the third embodiment is different from the first embodiment above in that:
  • Step 110 specifically includes:
  • Step 1141 The terminal device obtains configuration information, and the configuration information is used to determine the corresponding relationship between the transmission power level and the resource pool; as shown in FIG. 10, the transmission power of the terminal device can be classified, and those in the same transmission power level
  • the terminal device uses the resources in the same resource pool, or each resource pool can correspond to multiple power levels; or, there is no power level, that is, each resource pool corresponds to a power range, and the terminal determines the corresponding resource according to its own transmission power Pool.
  • the configuration information is configuration information sent by the network or pre-configuration information.
  • Step 1142 Acquire the first resource set in the resource pool corresponding to the transmit power of the terminal device.
  • step 120 is specifically:
  • the resource is excluded from the first resource set. Since the transmission power of the terminal equipment in the same resource pool is at the same power level, that is, the transmission power of each terminal will not differ greatly, therefore, the process of resource listening or selection in the resource pool can continue to use existing resources The process of listening and selecting does not need to adjust the RSRP_thd threshold or adjust the measured PSSCH-RSRP.
  • the resource selection process can be:
  • the terminal device determines the PSSCH-RSRP threshold
  • the terminal device After detecting the PSCCH of the other transmitting terminal, the terminal device measures the RSRP of the PSSCH scheduled by the PSCCH to obtain the PSSCH-RSRP;
  • the PSSCH-RSRP is greater than or equal to the PSSCH-RSRP threshold, the resources occupied by the other sending terminal are excluded from the first resource set.
  • the method further includes step 140 between steps 120 and 130:
  • the fourth embodiment of the present invention is to divide the resource pool according to the power level, so that the transmission power of the terminal in the same resource pool is at the same power level, and the difference is not large, so as to avoid the large difference in transmission power, which leads to the interception. As a result, the situation of preempting the transmission resources of users with low transmit power is avoided.
  • the step of "excluding the resources occupied by the other sending terminal from the first resource set" in the foregoing specific implementation manners 1 to 4 may include:
  • the first resource belongs to the first resource set, and the first resource overlaps with the transmission resource used by the other terminal device for the next transmission, the first resource is excluded from the first resource set .
  • each transmission resource in the first resource set includes 4 subbands (a subband includes multiple physical resource blocks PRBs continuous in the frequency domain).
  • transmission resource 1 includes the first time in the resource selection window.
  • the subbands 1, 2, 3, 4 of the slot transmission resource 2 includes the first time slot subband 3, 4, 5, and 6 in the resource selection window, and transmission resource 3 includes the first time slot in the resource selection window Subbands 5, 6, 7, 8; if the next transmission of other terminal equipment uses subband 3 including the first time slot in the resource selection window, the terminal equipment will compare the first time slot in the first resource set with the first The overlapping transmission resources of subband 3 of each time slot are eliminated, that is, transmission resource 1 and transmission resource 2 are excluded.
  • the PSCCH of the other terminal device carries the first time interval.
  • the PSCCH of the other terminal device carries the SCI, and the SCI carries the first time interval.
  • the transmission resource used for the next transmission of the other terminal device may be a transmission resource used for transmitting a new data packet, or a transmission resource used for transmitting retransmitted data.
  • the resource selection methods provided in the foregoing specific implementation manners 1 to 4 are applicable to any terminal-to-terminal system, and in particular, are also applicable to vehicle network systems.
  • FIG. 11 is a block diagram of a fifth specific implementation manner of a terminal device in a vehicle networking system of the present invention.
  • the terminal equipment includes:
  • the listening module 210 is configured to obtain a first resource set, where the resources in the first resource set are candidate transmission resources;
  • the selection module 220 is configured to perform listening, and exclude unavailable resources from the first resource set according to the measured RSRP and RSRP thresholds of resources occupied by other sending terminals;
  • the transmission module 230 is configured to select a resource from the first resource set for data transmission.
  • the terminal device is selected from the first resource set according to a certain criterion.
  • the transmission module 230 specifically includes:
  • the sorting module 231 is configured to perform S-RSSI detection on the resources in the first resource set, and according to the S-RSSI detection value to sort the corresponding resources according to the energy level, and put a part of the resources with the lowest energy into the second resource set; where The ranking 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 first resource set according to the S-RSSI detection result S-RSSI of the resource in.
  • the determining module 232 is configured to select a resource from the second resource set for data transmission. Optionally, the determining module 232 selects a resource from the second resource set with a moderate probability for data transmission.
  • the device further includes a reselection module 240, configured to increase RSRP_thd by a certain value, such as 3dB, when it is determined that the number of available resources in the first resource set is less than a threshold after the selection module 220 performs resource exclusion. , And then call the listening module 210 to re-enter the resource listening and selection process.
  • a reselection module 240 configured to increase RSRP_thd by a certain value, such as 3dB, when it is determined that the number of available resources in the first resource set is less than a threshold after the selection module 220 performs resource exclusion. , And then call the listening module 210 to re-enter the resource listening and selection process.
  • the first resource set is a resource set composed of resources in a resource selection window.
  • the size of the candidate transmission resource is determined according to the data to be sent by the terminal device.
  • the listening module 110 and the transmission module 130 are the same as the fifth specific implementation manner described above.
  • the sixth specific embodiment is different from the fifth specific embodiment above in that the selection module 220 is specifically configured to determine the difference between the transmission power of other transmitting terminals and the transmission power of the data to be transmitted by the terminal device, according to the The difference adjusts the measured RSRP of the resources occupied by other sending terminals, or adjusts the RSRP threshold according to the difference, and according to the adjusted RSRP or the adjusted RSRP threshold, the resources are not available Excluded from the first resource set.
  • the specific implementation methods are:
  • the selection module 220 specifically includes:
  • the initial threshold value acquisition module 2211 is used to determine the threshold value of PSSCH-RSRP, that is, the first PSSCH-RSRP;
  • the threshold adjustment module 2212 is configured to adjust the first RSRP_thd to obtain a second 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; wherein, the transmission power of the other transmitting terminal
  • the transmission power of the other transmitting terminal For the method of obtaining the transmit power, refer to the description of step 1212 in the second specific implementation manner above, and the details are not repeated here;
  • the measuring module 2213 is configured to measure the RSRP of the PSSCH scheduled by the PSCCH after detecting the PSCCH of the other transmitting terminal to obtain the first PSSCH-RSRP;
  • the first exclusion module 2214 is 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.
  • the threshold adjustment module 2212 may also be used 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 sent by the listening terminal.
  • the selection module 220 specifically includes:
  • the initial measurement value acquisition module 2221 is configured to, after detecting the PSCCH of the other sending terminal, measure the reference signal of the PSSCH scheduled by the PSCCH to obtain the first PSSCH-RSRP;
  • the measurement value adjustment module 2222 is configured to adjust the first PSSCH-RSRP to obtain the second 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; specifically, the For the method for obtaining the transmit power of other transmitting terminals, refer to the specific description of step 1212 in the second specific implementation manner above, and the details are not repeated here.
  • the threshold value obtaining module 2223 is used to determine the first RSRP_thd of the PSSCH;
  • 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 from the first resource set when the second RSRP is greater than or equal to the first RSRP_thd.
  • 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.
  • the terminal device further includes:
  • the control module 240 is used to limit the power control of the terminal device in a time window.
  • the time window can be obtained through network configuration or preset methods.
  • control module 240 is specifically configured to control the terminal device not to perform power control within a time window, and power control can be performed only when it goes from one time window to the next time window.
  • control module 240 can also be specifically configured to perform power control according to the side link path loss when the terminal device transmits data for the first time in each time window, and during other transmissions in the time window , No power control. That is, the transmission power is not adjusted according to the side link loss.
  • FIG. 15 is a block diagram of a seventh embodiment of a terminal device in a D2D system of the present invention.
  • the listening module 210 and the transmission module 230 are the same as those in the fifth embodiment.
  • the seventh embodiment is different from the fifth embodiment above in that the selection module 220 specifically includes:
  • 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;
  • the PSCCH threshold value acquisition module 2233 is configured to determine the PSCCH-RSRP threshold value; optionally, the threshold value is based on priority information P1 in the SCI carried in the PSCCH, and the data to be sent by the terminal device If the priority P2 is determined, the specific determination method can be referred to the description in the second embodiment, which is not repeated here;
  • the resource exclusion module 2234 determines that the measured PSCCH-RSRP is greater than or equal to the threshold, and then excludes the resources occupied by the other sending terminals from the first resource set.
  • the selection module 220 specifically further includes:
  • the power control module 2231 is used to perform power control on the PSCCH according to the broadcast mode. That is, the downlink path loss is considered in power control, but the side path loss is not considered; or the PSCCH does not perform power control based on the path loss of the side link; or the PSCCH does not perform power control; or the PSCCH is transmitted with the maximum transmission power.
  • the maximum transmission power may be the maximum transmission power that the terminal can support, or the maximum transmission power configured by the network.
  • the power control module 2231 is specifically used to perform power control on the PSSCH in a unicast or multicast manner.
  • the transmit power of the terminal can be determined according to the downlink path loss between the terminal and the network, or according to the side transmission between the terminal and the receiving terminal.
  • the path loss of the link is determined, or based on the path loss of the downlink and the path loss of the side link at the same time.
  • the seventh embodiment of the present invention is to perform power control on the PSSCH in a unicast or multicast manner, and determine the transmission power on the PSCCH in a broadcast manner, that is, do not perform power control on the PSCCH or perform power control on the PSCCH according to the downlink path loss.
  • the measured PSCCH-RSRP to confirm whether the resource is available, it will not lead to misjudgment and avoid the situation of preempting the transmission resources of users with low transmission power.
  • FIG. 16 is a block diagram of the eighth embodiment of a terminal device in a vehicle networking system of the present invention.
  • the transmission module 230 is the same as that of the fifth embodiment.
  • the seventh embodiment is different from the fifth embodiment above in that the interception module 210 specifically includes:
  • the configuration information obtaining module 2141 is configured to obtain configuration information, where the configuration information is used to determine the corresponding relationship between the transmission power level and the resource pool; optionally, the configuration information is configuration information sent by the network or pre-configuration information.
  • the resource acquisition module 2142 acquires the first resource set in the resource pool corresponding to the transmission power of the terminal device.
  • the selection module 220 is specifically configured to determine that the measured RSRP of the PSSCH scheduled by the resource occupied by the other transmitting terminal is greater than or equal to RSRP_thd, and then the resource is excluded from the first resource set.
  • the existing resource listening and selection methods can be used without adjusting the RSRP_thd threshold or adjusting the measured PSSCH-RSRP.
  • the listening module 210 also includes:
  • the restart module 2143 is used to switch the resource pool corresponding to the terminal device when the transmission power of the terminal device changes, causing the corresponding resource pool to change, and call the listening module 210 and the selection module 220, after switching Listening and resource selection in the resource pool.
  • the eighth embodiment of the present invention is to divide the resource pool according to the power level, so that the transmission power of the terminals in the same resource pool are at the same power level, and the difference is not large, so as to avoid the large difference in the transmission power, resulting in the interception. As a result, the situation of preempting the transmission resources of users with low transmit power is avoided.
  • the fourth embodiment which is not repeated here.
  • the selection module 220 further includes:
  • the determining module 2251 is used to determine the first time interval
  • the resource determining module 2252 is configured to determine, according to the resources of the PSCCH and/or the PSSCH, and the first time interval, the transmission resource used by the other terminal equipment for the next transmission;
  • the overlapping resource exclusion module 2253 if the first resource belongs to the first resource set, and the first resource overlaps with the transmission resource used by the other terminal device for the next transmission, exclude it from the first resource set Drop the first resource.
  • the selection module 220 is further configured to obtain the first time interval from the PSCCH of the other terminal equipment, and the PSCCH of the other terminal equipment carries the first time interval.
  • the PSCCH of the other terminal device carries the SCI, and the SCI carries the first time interval.
  • the transmission resource used for the next transmission of the other terminal device may be a transmission resource used for transmitting a new data packet, or a transmission resource used for transmitting retransmitted data.
  • FIG. 17 is a schematic structural diagram of a terminal device 300 according to the ninth embodiment of the present invention.
  • the terminal device 300 includes an antenna 310, a radio frequency device 320, and a baseband device 330.
  • 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.
  • the baseband device 330 sends the processed information to the radio frequency device 320, and the radio frequency device 320 processes the received information and sends it out through the antenna 310.
  • the baseband device 330 executes the steps of the resource selection method in the Internet of Vehicles system provided in the above-mentioned specific embodiments 1 to 4.
  • the baseband device 330 includes a processor 331, a memory 332, and a network interface 333.
  • the processor 331 calls a program in the memory 332 to execute the steps of an uplink control channel transmission method provided in the first embodiment.
  • 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.
  • the processor 331 may be an independent component or a collective term for multiple processing components. For example, it may 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 FPGA.
  • the present invention is described with reference to 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 process and/or block in the flowchart and/or block diagram, and the combination of processes 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 equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment can be generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • the program may be stored in a computer-readable storage medium, which may include: read only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc.

Abstract

一种终端到终端系统中的资源选取方法及终端设备。方法包括：终端设备获取第一资源集合，其中，第一资源集合中的资源是候选传输资源；终端设备进行侦听，根据测量的其他发送终端占用的资源的RSRP以及RSRP门限值，将不可用资源从第一资源集合中排除；终端设备在第一资源集合中选取一个资源进行数据传输。该方法及终端设备可以将发送功率差值较大的其他发送终端所占用的资源从第一资源集合中排除，从而避免抢占低发送功率终端的传输资源，避免造成对其传输的干扰。

Description

一种车联网系统中的资源选取方法及其用户设备 【技术领域】
本发明涉及通信技术领域，尤其涉及车联网技术领域。
【背景技术】
传统的蜂窝系统是通过基站接收或者发送通信数据。与之不同的是，车联网系统采用的是终端到终端(D2D，Device to Device)直接通信的方式。其是一种侧行链路传输技术(SL：Sidelink，侧行链路)，具有更高的频谱效率以及更低的传输时延。
3GPP(3rd Generation Partnership Project，第三代合作伙伴计划)对于车联网系统定义了两种传输模式：一种是，由基站分配终端的传输资源；另一种是，车载终端在资源池中选取传输资源进行传输，可通过侦听的方式选取或者随机选取。
在NR-V2X中，即基于5G(5 Generation，第五代)移动通信系统的新空口(NR，New Radio)系统演进形成的V2X车联网无线通信技术中，对车辆之间数据交互提出了更高的要求，如更高的吞吐量、更低的时延、更高的可靠性、更大的覆盖范围、更灵活的资源分配等。其除了广播传输方式，还引入了单播和组播的传输方式，还引入了功率控制机制，以及为提高可靠性还引入了侧行反馈信道。
对于广播传输方式，为了让更多的终端接收到数据，发送端终端通常使用最大的发送功率发送数据。但是对于单播或者组播传输方式，因其接收终端数量或距离有限，发送端终端可以根据侧行链路状况调整发送功率，从而达到节能的目的，并且可以降低对其他传输链路的干扰。
但是，引入了功率控制后，发送终端可在一定条件下降低发送功率，从而导致其他终端在侦听过程中，误判该发送终端使用的传输资源可用，出现抢占低发送功率用户的传输资源、干扰其传输的问题。
【发明内容】
本发明要解决的技术问题是提供一种用于终端到终端系统的、可降低传输干扰的资源选取方法及其终端设备。
本发明提供以下技术方案：
一方面，一种终端到终端系统中的资源选取方法，其包括：终端设备获取第一资源集合，其中，所述第一资源集合中的资源是候选传输资源；所述终端设备进行侦听，根据测量的其他发送终端占用的资源的RSRP以及RSRP门限值，将不可用资源从所述第一资源集合中排除；所述终端设备在所述第一资源集合中选取一个资源进行数据传输。
另一方面，一种终端到终端系统中的终端设备，其包括：侦听模块，用于获取第一资源集合，其中，所述第一资源集合中的资源是候选传输资源；选取模块，用于所述终端设备进行侦听，根据测量的其他发送终端占用的资源的RSRP以及RSRP门限值，将不可用资源从所述第一资源集合中排除；传输模块，用于在所述第一资源集合中选取一个资源进行数据传输。
一种终端设备，所述终端设备包括：处理器，存储器，其特征在于：所述存储器上存储并可在所述处理器上运行的上行控制信道传输程序，所述处理器执行所述上行控制信道传输程序时，实现任意一项所述的资源选取方法。
一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有资源选取程序，所述资源选取程序被处理器执行时实现任意一项所述的资源选取方法。
本发明的有益效果在于：在终端到终端的系统中，由于其他发送终端有可能进行功率控制，因此其参考信号RSRP可能比较低，而误判该资源可用，因此，根据测量的其他发送终端占用的资源的RSRP以及RSRP门限值，将不可用资源从第一资源集合中排除，从而补偿因为发送功率差异导致的对传输资源是否可用的误判，从而避免抢占低发送功率终端的传输资源，造成对其传输的干扰。
【附图说明】
图1为本发明具体实施方式应用的场景图。
图2为本发明一种终端到终端系统中的资源选取方法的具体实施方式一的流程图。
图3为本发明一种终端到终端系统中的资源选取方法的具体实施方式二的流程图。
图4为具体实施方式二中的方式一的流程图。
图5为具体实施方式二中的方式二的流程图。
图6为具体实施方式二中的方式三的流程图。
图7为本发明一种终端到终端系统中的资源选取方法的具体实施方式三的流程图。
图8为具体实施方式三中PSCCH和PSSCH占用不同时域资源的。
图9为本发明一种终端到终端系统中的资源选取方法的具体实施方式四的流程图。
图10为具体实施方式四中资源池示意图。
图11为本发明一种终端到终端系统中的终端设备的具体实施方式五的模块图。
图12为具体实施方式五中实例1的流程图。
图13为具体实施方式五中实例2的流程图。
图14为具体实施方式五中实例3的流程图。
图15为本发明一种终端到终端系统中的终端设备的具体实施方式七的模块图。
图16为本发明一种终端到终端系统中的终端设备的具体实施方式八的模块图。
图17为具体实施方式五至八中进一步优化的选取模块增加的模块示意图。
图18为本发明具体实施方式九提供的一种终端设备的结构示意图。
【具体实施方式】
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。但是，本发明可以以多种不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本实用新型的公开内容的理解更加透彻全面。
除非另有定义，本文所实用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在限制本发明。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
以下是本申请中出现的关键术的缩略语及其中英文全称的对应表：
缩写 英文全称 中文全称
LTE Long Term Evaluation 长期演进
V2V Vehicle to Vehicle 车辆到车辆
V2X Vehicle to Everything 车辆到其他设备
D2D Device to Device 终端到终端
SCI Sidelink Control Information 侧行链路控制信息
PSCCH Physical Sidelink Control Channel 物理侧行控制信道
PSSCH Physical Sidelink Shared Channel 物理侧行共享信道
S-RSRP Sidelink Reference Signal Received Power 侧行参考信号接收功率
S-RSSI Sidelink Received Signal Strength Indicator 侧行接收信号场强指示
DMRS Demodulation Reference Signal 解调参考信号
本发明具体实施方式揭示的是一种应用于车联网系统的资源选取方式及其终端设备。本发明以下具体实施方式使用的系统架构为：在NR-V2X中，发送终端在传输数据之前，需选取传输资源。由于NR-V2X在车联网系统不仅有广播传输的通信方式，还引入了单播传输、组播传输的通信方式，以及引入了功率控制机制。由于在单播传输、组播传输中，终端会进行功率控制，可降低发送功率，由此会导致其他发送终端在进行侦听选取传输资源时，会误认为进行功率控制的终端使用的传输资源可用，从而出 现抢占低发送功率终端的传输资源，干扰其传输的问题。因此，当其他发送终端选取传输资源时，则需对传输资源进行识别并排除，避免不同终端之间因发送功率差异较大，造成较大的传输干扰。
如图1所示，假设系统中有UE1、UE2、UE3以及UE4四个车载终端，其中UE1与UE 2之间为单播传输，UE3为广播传输。UE1和UE2进行单播通信时，会进行功率控制，因为UE1和UE2距离很近，因此UE1的发送功率会很低，例如，UE1的发送功率为10dBm。当UE3进行侦听时，由于UE1的发送功率低，因此UE3测量UE1的PSSCH-RSRP很低，从而认为UE1使用的传输资源上的干扰很低，该传输资源为可用资源。如果UE3选取了该传输资源，并且进行广播传输，为了保证UE3的数据能够被更多的用户接收，例如UE4，通常UE3会采用最大功率(例如23dBm)发送，因此UE3的信号对UE2的接收产生干扰，导致UE2接收UE1的数据失败。
本发明以下具体实施方式将详细阐述如何排除发射功率差异较大的终端设备占用的资源，从而降低或避免功率控制对终端的侦听和资源选取过程造成的影响，并减少由此而产生的传输干扰。
具体实施方式一
请参看图2，为本发明一种终端到终端系统中的资源选取方法的具体实施方式一的流程图，该方法应用于终端设备。该方法包括：
步骤110，终端设备获取第一资源集合，其中，所述第一资源集合中的资源是候选传输资源；
步骤120，所述终端设备进行侦听，根据测量的其他发送终端占用的资源的RSRP以及RSRP门限值，将不可用资源从所述第一资源集合中排除；
步骤130，所述终端设备在所述第一资源集合中选取一个资源进行数据传输。
具体的，所述终端设备是根据一定的准则，在所述第一资源集合中进行选取的。例如，步骤130可以具体包括：
步骤131，所述终端设备对第一资源集合中的资源进行S-RSSI(Sidelink Received Signal Strength Indicator，侧行接收信号场强指示)检测，并且根据S-RSSI检测值将对应资源按照能量高低进行排序，把能量最低的一部分 (如能量最低的20％)资源放入第二资源集合；其中，所述终端设备对第一资源集合中的资源进行S-RSSI检测，包括，所述终端对侦听窗内的资源进行S-RSSI检测，并且根据该S-RSSI检测结果计算所述第一资源集合中的资源的S-RSSI。
步骤132，终端从第二资源集合中选取一个资源进行数据传输。可选地，终端从第二资源集合中等概率的选取一个资源进行数据传输。
优选的，在步骤120之后，如果所述第一资源集合中，可用资源个数小于门限(例如，门限是资源选择窗内所有候选资源个数的20％，或者是第一资源集合中初始资源总数的20％)，则进行侦听的终端设备将RSRP门限提升一定数值，如3dB，再重复上述步骤120的资源排除过程。
优选的，所述第一资源集合是由资源选择窗内的资源构成的资源集合。
优选的，所述候选传输资源的大小是根据所述终端设备待发送数据确定的。
具体实施方式二
请参看图3，为本发明一种终端到终端D2D系统中的资源选取方法的具体实施方式二的流程图。其中，步骤110与步骤130与上述具体实施方式一相同。具体实施方式二与上述具体实施方式一不同之处在于，该步骤120具体为步骤120A：确定其他发送终端的发送功率与所述终端设备待发送数据的发送功率之间的差值，根据所述差值对测量的其他发送终端占用的资源的RSRP进行调整，或者根据所述差值对RSRP门限值进行调整，并根据调整后的RSRP，或者调整后的RSRP门限值，将不可用资源从所述第一资源集合中排除掉。具体的实现方式有：
方式一
请参看图4，该步骤120A具体包括：
步骤1211，确定PSSCH-RSRP的门限值，即第一PSSCH-RSRP门限值(以下用RSRP_thd表示PSSCH-RSRP门限值)；具体的，可以是根据检测到的所述其他发送终端的PSCCH中携带的优先级信息P1，以及所述终端设备的待传输数据的优先级信息P2，确定所述第一RSRP_thd；例如，通过预配置或者网络配置优先级和PSSCH-RSRP门限值的映射关系，进行 侦听的终端设备根据接收其他发送终端的P1和自身的P2，查找该映射关系即可确定PSSCH的RSRP_thd；
步骤1212，根据所述其他发送终端的发送功率以及所述终端设备待发送数据的发送功率，调整所述第一RSRP_thd，获得第二RSRP_thd；
步骤1213，所述终端设备在检测到所述其他发送终端的PSCCH后，测量所述PSCCH调度的PSSCH的RSRP，获得第一PSSCH-RSRP；需要说明的是，步骤1213并不限于在此顺序中，其可在步骤1211之前，也可在步骤1212之前；
步骤1214，根据所述第二PSSCH-RSRP的门限值以及所述第一PSSCH-RSRP，排除在所述第一资源集合中的不可用资源。具体的，当所述PSSCH的所述第一PSSCH-RSRP大于或等于所述第二RSRP_thd时，在所述第一资源集合中排除所述其他发送终端占用的资源。
具体的，步骤1212中，可根据所述PSCCH中携带的信息确定所述其他终端的发送功率。
其中，所述PSCCH中承载的侧行链路控制信息SCI，所述SCI携带第一指示信息，所述第一指示信息用于确定其他发送终端的发送功率。所述终端设备根据该第一指示信息以及所述终端设备的待发送数据的发送功率调整所述第一RSRP_thd。更为具体的，该发送功率指示信息可以是以下信息中的任意一种：
第一种，用于指示所述其他发送终端的发送功率的信息，例如，对终端的发送功率进行量化，量化后的发送功率信息携带在SCI中；
例如，终端的最大发送功率为23dBm，如果终端的发送功率小于0dBm，则量化为0dBm，如果终端的发送功率在[0，23]dBm之间，则按照向上取整的方式处理。例如，终端的发送功率时5.3dBm，则量化为6dBm，如果终端的发送功率时6.8dBm，则量化为7dBm，以此类推。则量化后的终端发送功率为[0，23]之间的整数，即需要5比特来表示任意的一个量化后的发送功率值。根据SCI中携带5比特的发送功率指示信息即可确定终端的发送功率
第二种，为功率等级标识，例如，对发送功率划分不同的等级，根据该功率等级标识可以确定相应的发送功率；
例如，根据终端的发送功率进行等级划分。如果终端发送功率小于等于0dBm，记为第一等级，如果发送功率在(0，1]dBm，记为第二等级，如果发送功率在(1，2]dBm，记为第三等级，如果发送功率在(2，3]dBm，记为第四等级，以此类推，如果发送功率在(22，23]dBm，记为第二十四等级，其中(A，B]表示发送功率大于A，小于等于B。因此，需要5比特来表示任意一个功率等级。根据SCI中携带5比特的发送功率指示信息即可确定终端的发送功率等级。
可选的，在每一个功率等级中，以该等级中最大的发送功率记为该终端的发送功率。例如，如果一个终端的功率等级为第三等级，则将2dBm确定为该终端的发送功率。
第三种，用于指示该终端的发送功率与第一功率的差值的信息；其中，第一功率可以是以下中的至少一种：
1、终端的最大发送功率，例如，终端的最大发送功率是23dBm；或者，
2、预配置的一个功率值，例如，通过协议预定义功率23dBm；或者
3、根据SCI中携带的参数信息确定的一个功率，例如，根据SCI中的优先级信息确定的门限值，如，根据优先级确定的RSRP的门限值。
进一步的，可以对该功率差值信息进行量化或者进行等级划分，具体的量化方式或等级划分方式可以参照第一种或第二种中的方法，这里不再赘述。
可选地，如果侦听终端检测到其他终端的发送功率大于或等于该侦听终端待发送数据的发送功率，则侦听终端不对RSRP_thd进行调整。
例如，如在图1中，假设UE1在进行侦听，UE1可以检测到其他发送终端UE3的PSCCH并且获知其发送功率为23dBm，大于自己的发送功率10dBm，则UE1在侦听过程中不对RSRP门限值进行调整。
举例说明，如图1所述，假设UE3在进行侦听，UE3可以检测到其他发送终端UE1的PSCCH并且获知其发送功率PtUE1为10dBm，而UE3自己的发送功率PtUE3为23dBm。UE3确定第一PSSCH-RSRP门限值 RSRP_thd1。RSRP_thd1可以是根据检测到的其他发送终端的SCI中携带的优先级信息P1和所述终端设备待传输数据的优先级信息P2确定的，假设根据P1和P2确定的RSRP_thd1＝4dB。根据所述其他发送终端的发送功率以及所述终端设备的待发送数据的发送功率，调整RSRP_thd1获得第二PSSCH-RSRP门限值RSRP_thd2。例如，RSRP_thd2＝RSRP_thd1+A，参数A是所述其他发送终端的发送功率和所述终端设备的待发送数据的发送功率之差。如图1所述，RSRP_thd2＝4+(10-23)＝-9dB。UE3测量其他发送设备UE1的PSSCH-RSRP1。将该PSSCH-RSRP1与该RSRP_thd2进行比较，大于或等于该RSRP_thd2，则排除UE1使用的传输资源，如果低于该RSRP_thd2，则认为UE1使用的传输资源可用。
方式二
请参看图5，该步骤120具体包括：
步骤1221，所述终端设备在检测到所述其他发送终端的PSCCH后，对所述PSCCH调度的PSSCH的参考信号进行测量，获得第一PSSCH-RSRP；
步骤1222，根据所述其他发送终端的发送功率以及所述终端设备待发送数据的发送功率，调整所述第一PSSCH-RSRP，获得第二PSSCH-RSRP；具体的，所述其他发送终端的发送功率的获取方法可参照上述步骤1212的具体描述，此处不做赘述。
步骤1223，确定PSSCH的第一RSRP_thd；具体的，可以是根据检测到的所述其他发送终端的PSCCH中携带的优先级信息P1，以及所述终端设备的待传输数据的优先级信息P2，确定所述第一RSRP_thd；需要说明的是，本步骤并不限于在此顺序中，其可在步骤1221之前，也可在步骤1222之前。
步骤1224，根据所述第一RSRP_thd以及所述第二PSSCH-RSRP，排除在所述第一资源集合中的不可用资源。具体的，当所述第二RSRP大于或等于所述第一RSRP_thd时，在所述第一资源集合中排除所述其他发送终端占用的资源。
可选地，如果侦听终端检测到其他终端的发送功率大于或等于该侦听终端待发送数据的发送功率，则侦听终端不对PSSCH-RSRP进行调整。
例如，如在图1中，假设UE1在进行侦听，UE1可以检测到其他发送终端UE3的PSCCH并且获知其发送功率为23dBm，大于自己的发送功率10dBm，则UE1在侦听过程中不对测量到的UE3的PSSCH-RSRP进行调整。
举例说明，依然如图1所述，假设UE3在进行侦听，UE1发送功率PtUE1为10dBm，UE3发送功率PtUE3为23dBm。UE3根据优先级P1和P2确定第一RSRP门限值RSRP_thd为4dB。UE3测量UE1的第一PSSCH-RSRP1为5dB。
根据所述其他发送终端的发送功率以及所述终端设备的待发送数据的发送功率，调整第一PSSCH-RSRP1获得第二PSSCH-RSRP2，如，PSSCH-RSRP2＝5+(23-10)＝18dB。将该PSSCH-RSRP2与该RSRP_thd进行比较，大于或等于该RSRP_thd，则排除UE1使用的传输资源，如果低于该RSRP_thd，则认为UE1使用的传输资源可用。
方式三
请继续参看图6，优化的，结合上述方式一和方式二，在本发明具体实施方式二中，该方法还包括：
步骤140，对终端设备在一个时间窗内的功率控制进行限制。其中，时间窗可以通过网络配置或预设的方式获得。
具体的，该步骤140可以是：控制终端设备在一个时间窗内不进行功率控制，只有从一个时间窗到下一个时间窗时，才可以行功率控制。
具体的，步骤140还可以是：在每个时间窗中，终端设备第一次传输数据时，可以根据侧行链路路损进行功率控制，在该时间窗内的其他次传输时，不进行功率控制。即，不根据侧行链路损调整发送功率。
可选地，终端根据侧行链路路损调整发射功率后，通过SCI中携带调整后的终端的发送功率指示信息，该发送功率指示信息如具体实施方式二的步骤1212中阐述的指示信息。
本发明具体实施方式二中，进行侦听的终端设备如果检测到PSCCH，则会对PSCCH调度的PSSCH的参考信号(如RSRP)进行测量，如果测量得到的RSRP大于或等于RSRP门限值，则认为该资源不可用，需排除该 资源。但是，考虑到在NR-V2X中，其他发送终端有可能进行功率控制，因此其参考信号RSRP可能比较低，而误判该资源可用，因此需要根据其他发送终端和自身待发送数据的发送功率的差值，对RSRP_thd进行调整获得对测量到的PSSCH-RSRP进行调整，将发送功率差值较大的其他终端所占用的资源从第一资源集合中排除，从而补偿因为发送功率差异导致的对传输资源是否可用的误判，从而避免抢占低发送功率终端的传输资源，造成对其传输的干扰。
具体实施方式三
请参看图7，为本发明一种终端到终端D2D系统中的资源选取方法的具体实施方式三的流程图。
本具体实施方式三中，步骤110与步骤130与上述具体实施方式一相同。具体实施方式三与上述具体实施方式一不同之处在于，该步骤120具体包括：
步骤1233，终端设备在检测到所述其他发送终端的PSCCH后，测量所述PSCCH的PSCCH-RSRP；可选地，所述参考信号是PSCCH的解调参考信号DMRS；
步骤1234，确定PSCCH-RSRP门限值(PSCCH-RSRP_thd)；可选地，所述门限值是根据PSCCH中承载的SCI中的优先级信息P1，和所述终端设备待发送数据的优先级P2确定的，其具体决定方式在可参考具体实施方式二中的描述，在此不做赘述；
步骤1235，确定所述测量的PSCCH-RSRP大于或等于所述PSCCH-RSRP门限值，则将所述其他发送终端占用的资源从所述第一资源集合中排除。即，当PSCCH-RSRP大于或等于该门限值时，则认为该其他终端设备占用的传输资源不可用，否则认为可用。
优选的，该步骤120还包括：
步骤1231，所述其他终端设备的PSCCH按照广播方式进行功率控制；即，在功率控制中考虑下行路损，不考虑侧行路损；或者PSCCH不根据侧行链路的路损进行功率控制；或者PSCCH不进行功率控制；或者PSCCH 以最大发送功率进行发送。其中，所述最大发送功率可以是终端能够支持的最大发送功率，或者是网络配置的最大发送功率。
优选的，该步骤120还包括：
步骤1232，所述其他终端设备的PSSCH按照单播或组播的方式进行功率控制。即，在功率控制中考虑下行路损和/或侧行路损。当终端以单播或者组播的方式进行功率控制时，该终端的发送功率可以根据该终端与网络之间的下行链路的路损确定，或者根据该终端与接收端终端之间的侧行链路的路损确定，或者同时根据下行链路的路损和侧行链路的路损确定。
可选地，PSCCH和PSSCH可使用不同的时域资源进行数据传输。由于PSCCH使用最大发送功率发送，而PSSCH根据侧行链路路损进行功率控制，因此PSCCH和PSSCH可以使用不同的时域资源进行传输。其中，PSCCH和PSSCH可以位于相同或不同的时隙/子帧。如图8所示，Pt-1≤Pt-max，Pt-max表示最大发送功率，Pt-1表示根据侧行链路路损确定的发送功率。
由于，进行侦听的终端设备需要检测其他发送终端的PSCCH，根据PSCCH获取PSSCH的传输资源，并且测量PSSCH的参考信号PSSCH-RSRP，与RSRP门限值进行比较，从而决定该PSSCH使用的资源是否可用。但因功率控制会缩小PSCCH传输范围或者降低PSSCH-RSRP测量值，从而导致的其他终端检测不到该终端设备已经占用了传输资源，从而误判该资源可用。
而在本发明具体实施方式三，对PSSCH按照单播或者组播的方式进行功率控制，对PSCCH按照广播方式确定发送功率，即，不对PSCCH进行功率控制，或者按照下行路损对PSCCH进行功率控制，因此，根据测量的PSCCH-RSRP确认该资源是否可用，就不会导致误判，避免了出现抢占低发送功率用户的传输资源的情况。
具体实施方式四
请参看图9，为本发明一种车联网系统中的资源选取方法的具体实施方式四的流程图。本具体实施方式四中，步骤130与上述具体实施方式一相同。具体实施方式三与上述具体实施方式一不同之处在于，
步骤110具体包括：
步骤1141，所述终端设备获取配置信息，所述配置信息用于确定发送功率等级和资源池的对应关系；如图10所示，可以对终端设备的发送功率进行分级，处于同一发送功率等级的终端设备使用同一资源池内的资源，或者每个资源池也可以对应多个功率等级；或者，也可以没有功率等级，即每个资源池对应一个功率范围，终端根据自己的发送功率确定相应的资源池。
可选地，所述配置信息是网络发送的配置信息或者是预配置信息。
步骤1142，在该终端设备发送功率对应的资源池内，获取所述第一资源集合。
则步骤120具体为：
确定所述其他发送终端占用的资源调度的PSSCH的测量RSRP大于或等于RSRP_thd，则在所述第一资源集中排除该资源。由于在同一资源池内的终端设备的发送功率是处于同一功率等级，即各个终端的发送功率相差不会很大，因此，在该资源池内进行资源侦听或者选取的过程，可以沿用现有的资源侦听和选取的过程，而不需要调整RSRP_thd门限或者调整测量得到的PSSCH-RSRP。资源选取过程可以是：
所述终端设备确定PSSCH-RSRP门限值；
所述终端设备在检测到所述其他发送终端的PSCCH后，测量所述PSCCH调度的PSSCH的RSRP，得到PSSCH-RSRP；
若所述PSSCH-RSRP大于或等于所述PSSCH-RSRP门限值，在所述第一资源集合中排除所述其他发送终端占用的资源。
优化的，该方法在步骤120与130之间，还包括步骤140：
当终端设备的发送功率发生变化，导致其对应的资源池发生变化时，切换该终端设备对应的资源池；重新启动步骤110与120，在切换后的资源池中进行侦听和资源选取。
本发明的具体实施方式四，通过按照功率等级对资源池进行划分，使得在相同资源池内的终端的发送功率处于同一功率等级，相差不大，从而 避免因为发送功率差异较大，导致对侦听结果的影响，避免出现抢占低发送功率用户的传输资源的情况。
优选的，在上述具体实施方式一至四中所述“所述在所述第一资源集合中排除所述其他发送终端占用的资源”的步骤，可以包括：
所述终端设备获取第一时间间隔；
所述终端设备根据所述PSCCH和/或所述PSSCH的资源，以及所述第一时间间隔，确定所述其他终端设备下一次传输使用的传输资源；
若第一资源属于所述第一资源集合，并且所述第一资源和所述其他终端设备下一次传输使用的传输资源有重叠，则在所述第一资源集合中排除掉所述第一资源。
例如，所述第一资源集合中的每个传输资源包括4个子带(一个子带包括频域连续的多个物理资源块PRB)，例如，传输资源1包括资源选择窗内的第一个时隙的子带1、2、3、4，传输资源2包括资源选择窗内的第一个时隙子带3、4、5、6，传输资源3包括资源选择窗内的第一个时隙子带5、6、7、8；若其他终端设备的下一次传输使用包括资源选择窗内的第一个时隙的子带3，则所述终端设备在第一资源集合中把和第一个时隙的子带3重叠的传输资源都排除掉，即排除掉传输资源1和传输资源2。
其中，所述其他终端设备的PSCCH中携带所述第一时间间隔。具体地，所述其他终端设备的PSCCH中承载SCI，所述SCI中携带所述第一时间间隔。
其中，所述其他终端设备下一次传输使用的传输资源，可以是传输新数据包使用的传输资源，或者是传输重传数据使用的传输资源。
上述具体实施方式一至四中提供的资源选取方法适用于任意终端到终端的系统中，特别的，也适用于车辆网系统中。
具体实施方式五
请参看图11，为本发明一种车联网系统中的终端设备的具体实施方式五的模块图。该终端设备包括：
侦听模块210，用于获取第一资源集合，其中，所述第一资源集合中的资源是候选传输资源；
选取模块220，用于进行侦听，根据测量的其他发送终端占用的资源的RSRP以及RSRP门限值，将不可用资源从所述第一资源集合中排除；
传输模块230，用于在所述第一资源集合中选取一个资源进行数据传输。
具体的，所述终端设备是根据一定的准则，在所述第一资源集合中进行选取的。例如，传输模块230具体包括：
排序模块231，用于对第一资源集合中的资源进行S-RSSI检测，并且根据S-RSSI检测值将对应资源按照能量高低进行排序，把能量最低的一部分资源放入第二资源集合；其中，所述排序模块231对第一资源集合中的资源进行S-RSSI检测，包括，对侦听窗内的资源进行S-RSSI检测，并且根据该S-RSSI检测结果计算所述第一资源集合中的资源的S-RSSI。
确定模块232，用于从第二资源集合中选取一个资源进行数据传输。可选地，确定模块232，从第二资源集合中等概率的选取一个资源进行数据传输。
优选的，该装置还包括重选模块240，用于在所述选取模块220进行资源排除后，确定所述第一资源集中可用资源个数小于门限值时，将RSRP_thd提升一定数值，如3dB，再调用所述侦听模块210重新进入资源侦听和选取过程。
优选的，所述第一资源集合是由资源选择窗内的资源构成的资源集合。
优选的，所述候选传输资源的大小是根据所述终端设备待发送数据确定的。
具体实施方式六
本发明一种D2D系统中的资源选取方法的具体实施方式六中，侦听模块110与传输模块130与上述具体实施方式五相同。具体实施方式六与上述具体实施方式五不同之处在于，该选取模块220，具体用于确定其他发送终端的发送功率与所述终端设备待发送数据的发送功率之间的差值，根据所述差值对测量的其他发送终端占用的资源的RSRP进行调整，或者根据所述差值对RSRP门限值进行调整，并根据调整后的RSRP，或者调整后的RSRP门限值，将不可用资源从所述第一资源集合中排除掉。具体的实现方式有：
实例1
请参看图12，该选取模块220具体包括：
初始门限值获取模块2211，用于确定PSSCH-RSRP的门限值，即，第一PSSCH-RSRP；
门限值调整模块2212，用于根据所述其他发送终端的发送功率以及所述终端设备待发送数据的发送功率，调整所述第一RSRP_thd，获得第二RSRP_thd；其中，所述其他发送终端的发送功率的获取方法可以参看上述具体实施方式二中步骤1212的描述，在此不重复赘述；
测量模块2213，用于在检测到所述其他发送终端的PSCCH后，测量所述PSCCH调度的PSSCH的RSRP，获得第一PSSCH-RSRP；
第一排除模块2214，用于根据所述第二PSSCH-RSRP的门限值以及-所述第一PSSCH-RSRP，排除在所述第一资源集合中的不可用资源。具体的，当所述PSSCH的所述第一PSSCH-RSRP大于或等于所述第二RSRP_thd时，在所述第一资源集合中排除所述占用的资源。
可选地，门限值调整模块2212，还可用于在所述其他终端的发送功率大于或等于该侦听终端待发送数据的发送功率时，确定不调整RSRP_thd。
实例2
请参看图13，该该选取模块220具体包括：
初始测量值获取模块2221，用于在检测到所述其他发送终端的PSCCH后，对所述PSCCH调度的PSSCH的参考信号进行测量，获得第一PSSCH-RSRP；
测量值调整模块2222，用于根据所述其他发送终端的发送功率以及所述终端设备待发送数据的发送功率，调整所述第一PSSCH-RSRP，获得第二PSSCH-RSRP；具体的，所述其他发送终端的发送功率的获取方法可参照上述具体实施方式二中步骤1212的具体描述，此处不重复赘述。
门限值获取模块2223，用于确定PSSCH的第一RSRP_thd；
第二资源排除模块2224，用于根据所述第一RSRP_thd以及所述第二PSSCH-RSRP，排除在所述第一资源集合中的不可用资源。具体的，第二资 源排除模块2224，用于当所述第二RSRP大于或等于所述第一RSRP_thd时，在所述第一资源集合中排除所述PSSCH占用的资源。
可选地，所述测量值调整模块2222，还用于在所述其他终端的发送功率大于或等于该终端设备待发送数据的发送功率时，确定不调整所述第一PSSCH-RSRP。
实例3
请参看图14，结合上述实例1和实例2，在本发明具体实施方式六中，该终端设备还包括：
控制模块240，用于对终端设备在一个时间窗内的功率控制进行限制。其中，时间窗可以通过网络配置或预设的方式获得。
具体的，控制模块240，具体用于控制终端设备在一个时间窗内不进行功率控制，只有从一个时间窗到下一个时间窗时，才可以行功率控制。
具体的，控制模块240，还可以具体用于在每个时间窗中，终端设备第一次传输数据时，可以根据侧行链路路损进行功率控制，在该时间窗内的其他次传输时，不进行功率控制。即，不根据侧行链路损调整发送功率。
本发明具体实施方式六中有不详尽之处，请参看上述具体实施方式二。
具体实施方式七
请参看图15，为本发明一种D2D系统中的终端设备的具体实施方式七的模块图。其中，侦听模块210与传输模块230与上述具体实施方式五相同。具体实施方式七与上述具体实施方式五不同之处在于，该选取模块220具体包括：
PSCCH测量值获取模块2232，用于在检测到所述其他发送终端的PSCCH后，测量所述PSCCH的PSCCH-RSRP；可选地，所述参考信号是PSCCH的解调参考信号DMRS；
PSCCH门限值获取模块2233，用于确定PSCCH-RSRP门限值；可选地，所述门限值是根据PSCCH中承载的SCI中的优先级信息P1，和所述终端设备待发送数据的优先级P2确定的，其具体决定方式在可参考具体实施方式二中的描述，在此不做赘述；
资源排除模块2234，确定所述测量的PSCCH-RSRP大于或等于该门限值，则将所述其他发送终端占用的资源从所述第一资源集合中排除。
优选的，该选取模块220，具体还包括：
功率控制模块2231，用于按照广播方式对PSCCH进行功率控制。即，在功率控制中考虑下行路损，不考虑侧行路损；或者PSCCH不根据侧行链路的路损进行功率控制；或者PSCCH不进行功率控制；或者PSCCH以最大发送功率进行发送。其中，所述最大发送功率可以是终端能够支持的最大发送功率，或者是网络配置的最大发送功率。
优选的，所述功率控制模块2231，具体还用于PSSCH按照单播或组播的方式进行功率控制。当终端以单播或者组播的方式进行功率控制时，该终端的发送功率可以根据该终端与网络之间的下行链路的路损确定，或者根据该终端与接收端终端之间的侧行链路的路损确定，或者同时根据下行链路的路损和侧行链路的路损确定。
本发明具体实施方式七，对PSSCH按照单播或者组播的方式进行功率控制，对PSCCH按照广播方式确定发送功率，即，不对PSCCH进行功率控制，或者按照下行路损对PSCCH进行功率控制，因此，根据测量的PSCCH-RSRP确认该资源是否可用，就不会导致误判，避免了出现抢占低发送功率用户的传输资源的情况。本具体实施方式七未有详尽之处请参看上述具体实施方式三，在此不做赘述。
具体实施方式八
请参看图16，为本发明一种车联网系统中的终端设备的具体实施方式八的模块图。其中，传输模块230与上述具体实施方式五相同。具体实施方式七与上述具体实施方式五不同之处在于，该侦听模块210具体包括：
配置信息获取模块2141，用于获取配置信息，所述配置信息用于确定发送功率等级和资源池的对应关系；可选地，所述配置信息是网络发送的配置信息或者是预配置信息。
资源获取模块2142，在该终端设备发送功率对应的资源池内，获取所述第一资源集合。
则选取模块220，具体用于确定所述其他发送终端占用的资源调度的PSSCH的测量RSRP大于或等于RSRP_thd，则在所述第一资源集中排除该资源。本具体实施方式八中，可采用现有的资源侦听和选取的方式，而不需要调整RSRP_thd门限或者调整测量得到的PSSCH-RSRP。
优化的，该侦听模块210还包括：
重启模块2143，用于当终端设备的发送功率发生变化，导致其对应的资源池发生变化时，切换该终端设备对应的资源池，并调用所述侦听模块210和选取模块220，在切换后的资源池中进行侦听和资源选取。
本发明的具体实施方式八，通过按照功率等级对资源池进行划分，使得在相同资源池内的终端的发送功率处于同一功率等级，相差不大，从而避免因为发送功率差异较大，导致对侦听结果的影响，避免出现抢占低发送功率用户的传输资源的情况。本具体实施方式八中未有详尽之处请参见具体实施方式四，在此不做赘述。
优选的，在上述具体实施方式五至八中，所述选取模块220还包括：
确定模块2251，用于确定第一时间间隔；
资源确定模块2252，用于所述终端设备根据所述PSCCH和/或所述PSSCH的资源，以及所述第一时间间隔，确定所述其他终端设备下一次传输使用的传输资源；
重叠资源排除模块2253，若第一资源属于所述第一资源集合，并且所述第一资源和所述其他终端设备下一次传输使用的传输资源有重叠，则在所述第一资源集合中排除掉所述第一资源。
优化的，所述选取模块220，还用于从所述其他终端设备的PSCCH中获取所述第一时间间隔，所述其他终端设备的PSCCH中携带所述第一时间间隔。具体地，所述其他终端设备的PSCCH中承载SCI，所述SCI中携带所述第一时间间隔。
其中，所述其他终端设备下一次传输使用的传输资源，可以是传输新数据包使用的传输资源，或者是传输重传数据使用的传输资源。
具体实施方式九
请参看图17，本发明具体实施方式九提供的一种终端设备300的结构示意图。该终端设备300包括：天线310，射频装置320，以及基带装置330。上行方向上，该射频装置320通过该天线310接收终端设备上传的信息，并将接收到的信息发送给基带装置330进行处理。在下行方向，基带装置330将处理后的信息发送给射频装置320，该射频装置320将接收到的信息进行处理后，通过天线310发送出去。
该基带装置330执行上述具体实施方式一至四中提供的一种车联网系统中的资源选取方法的步骤。
具体的，该基带装置330包括：处理器331、存储器332以及网络接口333。处理器331调用存储器332中的程序，执行上述具体实施方式一提供的一种上行控制信道传输方法的步骤。网络接口333与射频装置320交互信息，将该处理器331处理后的信号发送给射频装置320。
该处理器331可以是一个独立的元器件，也可以是多个处理元件的统称。例如，可以是CPU，也可以是ASIC，或者被配置成实施以上方法的一个或多个集成电路，如至少一个微处理器DSP，或至少一个可编程门这列FPGA等。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。该程序可以存储于一计算机可读存储介质中，存储介质可以包括：只读存储器(ROM，Read Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁盘或光盘等。
上述具体实施方式说明但并不限制本发明，本领域的技术人员能在权利要求的范围内设计出多个可代替实例。所属领域的技术人员应该意识到，对在没有违反如所附权利要求书所定义的本发明的范围之内，可对具体实 现方案做出适当的调整、修改等。因此，凡依据本发明的精神和原则，所做的任意修改和变化，均在所附权利要求书所定义的本发明的范围之内。

Claims (30)

  1. 一种终端到终端系统中的资源选取方法，其特征在于，该方法包括：
    终端设备获取第一资源集合，其中，所述第一资源集合中的资源是候选传输资源；
    所述终端设备进行侦听，根据测量的其他发送终端占用的资源的RSRP以及RSRP门限值，将不可用资源从所述第一资源集合中排除；
    所述终端设备在所述第一资源集合中选取一个资源进行数据传输。
  2. 根据权利要求1所述的方法，其特征在于，所述“所述终端设备进行侦听，根据测量的其他发送终端占用的资源的RSRP以及RSRP门限值，将不可用资源从所述第一资源集合中排除”的步骤具体包括：
    所述终端设备确定其他发送终端的发送功率与所述终端设备待发送数据的发送功率之间的差值，根据所述差值对测量的其他发送终端占用的资源的RSRP进行调整，或者根据所述差值对RSRP门限值进行调整，并根据调整后的RSRP，或者调整后的RSRP门限值，将不可用资源从所述第一资源集合中排除掉。
  3. 根据权利要求2所述的方法，其特征在于，所述“所述终端设备进行侦听，根据测量的其他发送终端占用的资源的RSRP以及RSRP门限值，将不可用资源从所述第一资源集合中排除”的步骤包括：
    所述终端设备确定第一PSSCH-RSRP门限值；
    根据所述其他发送终端的发送功率以及所述终端设备待发送数据的发送功率之间的差值，调整所述第一PSSCH-RSRP门限值，获得第二PSSCH-RSRP门限值；
    所述终端设备在检测到所述其他发送终端的PSCCH后，测量所述PSCCH调度的PSSCH的RSRP，获得第一PSSCH-RSRP；
    若所述第一PSSCH-RSRP大于或等于所述第二PSSCH-RSRP门限值，在所述第一资源集合中排除所述其他发送终端占用的资源。
  4. 根据权利要求2所述的方法，其特征在于，所述“所述终端设备进行侦听，根据测量的其他发送终端占用的资源的RSRP以及RSRP门限值，将不可用资源从所述第一资源集合中排除”步骤包括：
    所述终端设备确定第一PSSCH-RSRP门限值；
    所述终端设备在检测到所述其他发送终端的PSCCH后，测量所述PSCCH调度的PSSCH的RSRP，获得第一PSSCH-RSRP；
    根据所述其他发送终端的发送功率以及所述终端设备待发送数据的发送功率之间的差值，调整所述第一PSSCH-RSRP，获得第二PSSCH-RSRP；
    若所述第二PSSCH-RSRP大于或等于所述第一PSSCH-RSRP门限值，在所述第一资源集合中排除所述其他发送终端占用的资源。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据所述其他终端设备的PSCCH中携带的优先级信息和所述终端设备待传输数据的优先级信息确定所述PSSCH-RSRP门限值。
  6. 根据权利要求2至5中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据所述PSCCH中携带第一指示信息，确定所述其他终端的发送功率。
  7. 根据权利要求1所述的方法，其特征在于，所述“所述终端设备进行侦听，根据测量的其他发送终端占用的资源的RSRP以及RSRP门限值，将不可用资源从所述第一资源集合中排除”的步骤包括：
    所述终端设备在检测到所述其他发送终端的PSCCH后，测量所述PSCCH的PSCCH-RSRP；
    所述终端设备确定PSCCH-RSRP门限值；
    若所述PSCCH-RSRP大于或等于所述PSCCH-RSRP门限值，在所述第一资源集合中排除所述其他发送终端占用的资源。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据所述其他终端设备的PSCCH中携带的优先级信息和所述终端设备待传输数据的优先级信息确定所述PSCCH-RSRP门限值。
  9. 根据权利要求7至8中任一项所述的方法，其特征在于，所述方法还包括：
    所述其他终端设备的PSCCH按照广播的方式进行功率控制。
  10. 根据权利要求7至9中任一项所述的方法，其特征在于，所述方法还包括：
    所述其他终端设备的PSSCH按照单播或组播的方式进行功率控制。
  11. 根据权利要求1所述的方法，其特征在于，所述“所述终端设备获取第一资源集合”的步骤包括：
    所述终端设备获取配置信息，所述配置信息用于确定发送功率等级和资源池的对应关系；
    所述终端设备在该终端设备发送功率对应的资源池内，获取所述第一资源集合。
  12. 根据权利要求11所述的方法，其特征在于，所述“所述终端设备进行侦听，根据测量的其他发送终端占用的资源的RSRP以及RSRP门限值，将不可用资源从所述第一资源集合中排除”的步骤包括：
    所述终端设备确定PSSCH-RSRP门限值；
    所述终端设备在检测到所述其他发送终端的PSCCH后，测量所述PSCCH调度的PSSCH的RSRP，得到PSSCH-RSRP；
    若所述PSSCH-RSRP大于或等于所述PSSCH-RSRP门限值，在所述第一资源集合中排除所述其他发送终端占用的资源。
  13. 根据权利要求3、4、7或12中任意一项所述的方法，其特征在于，所述“所述在所述第一资源集合中排除所述其他发送终端占用的资源”的步骤包括：
    所述终端设备获取第一时间间隔；
    所述终端设备根据所述PSCCH和/或所述PSSCH的资源，以及所述第一时间间隔，确定所述其他终端设备下一次传输使用的传输资源；
    若第一资源属于所述第一资源集合，并且所述第一资源和所述其他终端设备下一次传输使用的传输资源有重叠，则在所述第一资源集合中排除掉所述第一资源。
  14. 根据权利要求13所述的方法，其特征在于，所述方法还包括：所述其他终端设备的PSCCH中携带所述第一时间间隔。
  15. 一种终端到终端系统中的终端设备，其特征在于，该终端设备包括：
    侦听模块(210)，用于获取第一资源集合，其中，所述第一资源集合中的资源是候选传输资源；
    选取模块(220)，用于所述终端设备进行侦听，根据测量的其他发送终端占用的资源的RSRP以及RSRP门限值，将不可用资源从所述第一资源集合中排除；
    传输模块(230)，用于在所述第一资源集合中选取一个资源进行数据传输。
  16. 权利要求15所述的终端设备，其特征在于：
    该选取模块(220)，具体用于确定其他发送终端的发送功率与所述终端设备待发送数据的发送功率之间的差值，根据所述差值对测量的其他发送终端占用的资源的RSRP进行调整，或者根据所述差值对RSRP门限值进行调整，并根据调整后的RSRP，或者调整后的RSRP门限值，将不可用资源从所述第一资源集合中排除掉。
  17. 权利要求16所述的终端设备，其特征在于，该该选取模块(220)具体包括：
    初始门限值获取模块(2211)，用于确定PSSCH的第一RSRP门限值；
    门限值调整模块(2212)，用于根据所述其他发送终端的发送功率以及所述终端设备待发送数据的发送功率之间的差值，调整所述第一PSSCH-RSRP门限值，获得第二PSSCH-RSRP门限值；
    测量模块(2213)，用于在检测到所述其他发送终端的PSCCH后，测量所述PSCCH调度的PSSCH的RSRP，获得第一PSSCH-RSRP；
    第一资源排除模块(2214)，用于当所述第一PSSCH-RSRP大于或等于所述第二PSSCH-RSRP门限值时，在所述第一资源集合中排除所述其他发送终端占用的资源。
  18. 权利要求16所述的终端设备，其特征在于，该选取模块(220)具体包括：
    初始测量值获取模块(2221)，用于在检测到所述其他发送终端的PSCCH后，测量所述PSCCH调度的PSSCH，得到第一PSSCH-RSRP；
    测量值调整模块(2222)，用于根据所述其他发送终端的发送功率以及所述终端设备待发送数据的发送功率的差值，调整所述第一PSSCH-RSRP，获得第二PSSCH-RSRP；
    RSRP门限值获取模块(2223)，用于确定第一PSSCH-RSRP门限值；
    第二资源排除模块(2224)，用于当所述第二PSSCH-RSRP大于或等于所述第一PSSCH-RSRP门限值时，在所述第一资源集合中排除所述其他发送终端占用的资源。
  19. 权利要求15至18中任意一项权利要求所述的终端设备，其特征在于，该终端设备还包括：
    所述RSRP门限值获取模块(2223)，用于根据所述其他终端设备的PSCCH中携带的优先级信息和所述终端设备待传输数据的优先级信息确定所述PSSCH-RSRP门限值。
  20. 权利要求16至19中任意一项权利要求所述的终端设备，其特征在于：
    所述该选取模块(220)，还用于根据所述PSCCH中携带第一指示信息，确定所述其他终端的发送功率。
  21. 权利要求15所述的资源选取方法，其特征在于，该选取模块(220)具体包括：
    PSCCH测量值获取模块(2232)，用于在检测到所述其他发送终端的PSCCH后，测量所述PSCCH的PSCCH-RSRP；
    PSCCH门限值获取模块(2233)，用于确定PSCCH的RSRP门限值；
    第三资源排除模块(2234)，用于当所述PSCCH-RSRP大于或等于所述PSCCH-RSRP门限值时，在所述第一资源集合中排除所述其他发送终端占用的资源。
  22. 权利要求21所述的资源选取方法，其特征在于，该PSCCH门限值获取模块(2233)，具体用于根据所述其他终端设备的PSCCH中携带的优先级信息和所述终端设备待传输数据的优先级信息确定所述PSCCH-RSRP门限值。
  23. 权利要求21至22所述的资源选取方法，其特征在于，该选取模块(220)还包括：
    功率控制模块(2231)，用于以广播方式对PSCCH的发送功率进行功率控制。
  24. 权利要求20至23所述的资源选取方法，其特征在于，该选取模块(220)还包括：
    功率控制模块(2231)，用于以单播或组播的方式对PSSCH的发送功率进行功率控制。
  25. 权利要求15所述的资源选取方法，其特征在于，该侦听模块(210)具体包括：
    配置信息获取模块(2141)，用于获取配置信息，所述配置信息用于确定发送功率等级和资源池的对应关系；
    资源获取模块(2142)，在该终端设备发送功率对应的资源池内，获取所述第一资源集合。
  26. 权利要求25所述的终端设备，其特征在于，所述选取模块(220)，具体包括：
    RSRP门限值确定模块(2241)，用于确定PSSCH-RSRP门限值；
    RSRP测量模块(2242)，用于在检测到所述其他发送终端的PSCCH后，测量所述PSCCH调度的PSSCH的RSRP，得到PSSCH-RSRP；
    第四资源排除模块(2243)，用于当所述PSSCH-RSRP大于或等于所述PSSCH-RSRP门限值时，在所述第一资源集合中排除所述其他发送终端占用的资源。
  27. 根据权利要求17、18、21或26中任意一项所述的终端设备，其特征在于，所述选取模块(220)还包括：
    确定模块(2251)，用于确定第一时间间隔；
    资源确定模块(2252)，用于所述终端设备根据所述PSCCH和/或所述PSSCH的资源，以及所述第一时间间隔，确定所述其他终端设备下一次传输使用的传输资源；
    重叠资源排除模块(2253)，若第一资源属于所述第一资源集合，并且所述第一资源和所述其他终端设备下一次传输使用的传输资源有重叠，则在所述第一资源集合中排除掉所述第一资源。
  28. 根据权利要求27所述的终端设备，其特征在于，所述选取模块(220)，还用于从所述其他终端设备的PSCCH中获取所述第一时间间隔，所述其他终端设备的PSCCH中携带所述第一时间间隔。
  29. 一种终端设备，所述终端设备包括：处理器，存储器，其特征在于：所述存储器上存储并可在所述处理器上运行的上行控制信道传输程序，所述处理器执行所述上行控制信道传输程序时，实现上述权利要求1至14中任意一项所述的资源选取方法。
  30. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有资源选取程序，所述资源选取程序被处理器执行时实现上述权利要求1至14中任意一项所述的资源选取方法。
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