WO2021134283A1 - Resource selection method, and device - Google Patents
Resource selection method, and device Download PDFInfo
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- WO2021134283A1 WO2021134283A1 PCT/CN2019/130071 CN2019130071W WO2021134283A1 WO 2021134283 A1 WO2021134283 A1 WO 2021134283A1 CN 2019130071 W CN2019130071 W CN 2019130071W WO 2021134283 A1 WO2021134283 A1 WO 2021134283A1
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- resource
- terminal device
- resources
- reserved
- terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
- H04W8/24—Transfer of terminal data
Definitions
- This application relates to the field of communications, and more specifically, to a method and device for selecting resources.
- the terminal device can select transmission resources in the resource pool by listening, and then the terminal device can send the physical side
- the line control channel (physical sidelink control channel, PSCCH) indicates the selected resource location to other terminal devices.
- PSCCH and the physical sidelink shared channel are sent at the same time, which means that the terminal device can only indicate its reserved transmission to other terminal devices after the initial transmission. Resources.
- the transmission resources selected by the terminal device may be pre-matched with other terminal devices.
- the reserved transmission resources conflict, which is not conducive to data transmission.
- the present application provides a method and device for selecting resources, which can avoid conflicts with resources reserved by other terminal devices, and is beneficial to improving communication performance.
- a method for selecting resources including: performing initial resource selection on a first terminal device, or the first terminal device has data arriving and triggering resource reselection under certain conditions, or the first terminal device
- the terminal device determines that its reserved resources are successfully preempted by other terminal devices
- the first terminal device selects the first resource from the first resource set, and the first resource set does not include the resource selection window being used by other terminals A resource reserved by the device; the first terminal device performs data transmission on the first resource.
- a terminal device which is used to execute the method in the first aspect or its implementation manners.
- the terminal device includes a functional module for executing the method in the foregoing first aspect or each of its implementation manners.
- a terminal device including a processor and a memory.
- the memory is used to store a computer program
- the processor is used to call and run the computer program stored in the memory to execute the method in the above-mentioned first aspect or each of its implementation modes.
- a device for implementing the method in the above-mentioned first aspect or each of its implementation manners.
- the device includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the device executes the method in the first aspect or its implementation manners.
- a computer-readable storage medium for storing a computer program that enables a computer to execute the method in the above-mentioned first aspect or each of its implementation manners.
- a computer program which when run on a computer, causes the computer to execute the method in the first aspect or its implementation manners.
- the first terminal device selects resources for the first resource, it only selects from the set of resources that have not been reserved by other terminal devices, which can avoid the occurrence of selected resources and resources reserved by other terminal devices.
- Conflict helps to improve communication performance.
- Fig. 1 is a schematic diagram of a wireless communication system applied in an embodiment of the present application.
- Fig. 2 is a schematic diagram of two transmission modes in the Internet of Vehicles provided by an embodiment of the present application.
- Fig. 3 is a schematic diagram of a method for resource selection through interception provided by an embodiment of the present application.
- Fig. 4 is a schematic diagram of a physical layer structure of PSCCH and PSSCH provided by an embodiment of the present application.
- Fig. 5 is a schematic diagram of a resource reservation method provided by an embodiment of the present application.
- Fig. 6 is a schematic diagram of a resource selection method provided by an embodiment of the present application.
- Fig. 7 is a schematic diagram of another resource selection method provided by an embodiment of the present application.
- Fig. 8 is a schematic diagram of another resource selection method provided by an embodiment of the present application.
- FIG. 9 is a schematic flowchart of a method for selecting resources according to an embodiment of the present application.
- FIG. 10 is a schematic diagram of another resource selection method provided by an embodiment of the present application.
- Fig. 11 is a schematic diagram of another resource selection method provided by an embodiment of the present application.
- FIG. 12 is a schematic block diagram of a terminal device provided by an embodiment of the present application.
- FIG. 13 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
- Fig. 14 is a schematic structural diagram of a device provided by an embodiment of the present application.
- FIG. 15 is a schematic structural diagram of a communication system provided by an embodiment of the present application.
- Fig. 1 is a schematic diagram of a system 100 according to an embodiment of the present application.
- the terminal device 110 is connected to a first network device 130 in a first communication system and a second network device 120 in a second communication system.
- the first network device 130 is a Long Term Evolution (Long Term Evolution).
- the second network device 120 is a network device under a New Radio (NR).
- LTE Long Term Evolution
- NR New Radio
- the first network device 130 and the second network device 120 may include multiple cells.
- FIG. 1 is an example of a communication system in an embodiment of the present application, and the embodiment of the present application is not limited to that shown in FIG. 1.
- the communication system to which the embodiment of the present application is adapted may include at least multiple network devices under the first communication system and/or multiple network devices under the second communication system.
- the system 100 shown in FIG. 1 may include one main network device under the first communication system and at least one auxiliary network device under the second communication system. At least one auxiliary network device is respectively connected to the one main network device to form multiple connections, and is connected to the terminal device 110 to provide services for it. Specifically, the terminal device 110 may simultaneously establish a connection through the main network device and the auxiliary network device.
- connection established between the terminal device 110 and the main network device is the main connection
- connection established between the terminal device 110 and the auxiliary network device is the auxiliary connection.
- the control signaling of the terminal device 110 may be transmitted through the main connection
- the data of the terminal device 110 may be transmitted through the main connection and the auxiliary connection at the same time, or may be transmitted only through the auxiliary connection.
- first communication system and the second communication system in the embodiments of the present application are different, but the specific types of the first communication system and the second communication system are not limited.
- the first communication system and the second communication system may be various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD) ), Universal Mobile Telecommunication System (UMTS), etc.
- GSM Global System of Mobile Communication
- CDMA Code Division Multiple Access
- WCDMA Wideband Code Division Multiple Access
- GPRS General Packet Radio Service
- LTE Long Term Evolution
- TDD Time Division Duplex
- UMTS Universal Mobile Telecommunication System
- the main network equipment and the auxiliary network equipment may be any access network equipment.
- the access network device may be a base station (Base Transceiver) in the Global System of Mobile Communications (GSM) system or Code Division Multiple Access (CDMA).
- BTS can also be a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, or an evolved base station in a Long Term Evolution (LTE) system (Evolutional Node B, eNB or eNodeB).
- GSM Global System of Mobile Communications
- CDMA Code Division Multiple Access
- Station, BTS can also be a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, or an evolved base station in a Long Term Evolution (LTE) system (Evolutional Node B, eNB or eNodeB).
- WCDMA Wideband Code Division Multiple Access
- LTE Long Term Evolution
- the access network device may also be a Next Generation Radio Access Network (NG RAN), or a base station (gNB) in an NR system, or a cloud radio access network (Cloud
- NG RAN Next Generation Radio Access Network
- gNB base station
- Cloud Cloud
- the access network device can be a relay station, access point, in-vehicle device, wearable device, or the public land mobile network (PLMN) that will evolve in the future Network equipment, etc.
- PLMN public land mobile network
- the first network device 130 is taken as the main network device, and the second network device 120 is taken as an auxiliary network device as an example.
- the first network device 130 may be an LTE network device, and the second network device 120 may be an NR network device.
- the first network device 130 may be an NR network device
- the second network device 120 may be an LTE network device.
- both the first network device 130 and the second network device 120 may be NR network devices.
- the first network device 130 may be a GSM network device, a CDMA network device, etc.
- the second network device 120 may also be a GSM network device, a CDMA network device, or the like.
- the first network device 130 may be a Macrocell
- the second network device 120 may be a Microcell, Picocell, Femtocell, or the like.
- the terminal device 110 may be any terminal device, and the terminal device 110 includes but is not limited to:
- a terminal device configured to receive/send communication signals; and/or Internet of Things (IoT) equipment.
- a terminal device set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a “wireless terminal” or a "mobile terminal”.
- Examples of mobile terminals include, but are not limited to, satellite or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, Internet/intranet PDA with internet access, web browser, memo pad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers or others including radio telephone transceivers Electronic device.
- Terminal equipment can refer to access terminals, user equipment (UE), user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device.
- the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks, or terminal devices in the future evolution of PLMN, etc.
- SIP Session Initiation Protocol
- WLL Wireless Local Loop
- PDA Personal Digital Assistant
- D2D communication may be performed between the terminal devices 120.
- the 5G system or 5G network may also be referred to as NR system or NR network.
- Device-to-device communication is a D2D-based sidelink (SL) transmission technology, which is different from the way in which communication data is received or sent through a base station in a traditional cellular system.
- the device-to-device direct communication method is also adopted in the Internet of Vehicles system, so it has higher spectrum efficiency and lower transmission delay.
- 3GPP 3rd Generation Partnership Project
- Mode A Mode A
- Mode B Mode B
- Mode A The transmission resources of the terminal are allocated by the base station, and the terminal transmits data on the side link according to the resources allocated by the base station; the base station can allocate resources for a single transmission to the terminal on the downlink (DL). It is also possible to allocate semi-static transmission resources to the terminal.
- Mode B The terminal selects a resource in the resource pool for data transmission. Specifically, the terminal may select transmission resources from the resource pool by means of listening, or select transmission resources from the resource pool by means of random selection.
- Figure 3 shows a schematic diagram of resource selection by means of listening.
- V2X when a new data packet arrives at time n and triggers the terminal to perform initial resource selection or triggers resource reselection, the terminal can, based on the listening results in the past 1 second, enter [n+T1,n+ T2] Resource selection within millisecond time range, where T1 ⁇ 4; 20 ⁇ T2 ⁇ 100.
- the selection of T1 should be greater than the processing delay of the terminal, and the selection of T2 needs to be within the required range of the service delay. For example, if the delay requirement of the service is 50ms, then 20 ⁇ T2 ⁇ 50, and if the delay requirement of the service is 100ms, then 20 ⁇ T2 ⁇ 100.
- a terminal device in a V2X scenario can indicate its reserved resources by carrying resource reservation information in the PSCCH, so that other terminal devices can determine the resources reserved by the terminal device by means of listening, and whether it is Need to release reserved resources.
- a terminal device When a terminal device selects resources, it can make a selection based on the resources reserved by other terminal devices.
- the process for the terminal to select resources in the selection window can be as follows:
- the terminal sends data on some subframes in the listening window without listening, the resources of these subframes on the corresponding subframes in the selection window are excluded.
- the terminal If the terminal sends data at time t within the listening window, the terminal does not listen to the data transmission status of other terminals. Therefore, the terminal can exclude all the resources that may be reserved by other terminals at time t in the selection window.
- the terminal detects the PSCCH in the listening window, it measures the reference signal receiving power (RSRP) of the PSSCH scheduled by the PSCCH. If the measured PSSCH-RSRP is higher than the PSSCH-RSRP threshold, and the reserved transmission resource is determined to be within the resource selection window of the terminal according to the reservation information in the control information transmitted in the PSCCH, the terminal is excluded from resource set A Drop the resource.
- the initial set of resource set A includes all candidate resources in the resource selection window, and the selection of the PSSCH-RSRP threshold is determined by the priority information carried in the detected PSCCH and the priority of the data to be transmitted by the terminal.
- the network device can configure the terminal device with the correspondence between the priority information and the PSSCH-RSRP threshold.
- the network device can configure the terminal device with the priority information carried in the PSCCH-the priority of the data to be transmitted, which is the same as the threshold. Correspondence between.
- the terminal After receiving the corresponding relationship, the terminal can determine the PSSCH-RSRP threshold used according to the corresponding relationship.
- the terminal can increase the PSSCH-RSRP threshold by 3dB, and repeat steps 1-2 until the number of resources remaining in set A More than 20% of the total resources.
- the terminal performs sidelink received signal strength indicator (S-RSSI) detection on the remaining resources in set A, and sorts them according to energy level, and sorts the 20% of the lowest energy (relative to set A) The number of resources) is placed in set B.
- S-RSSI sidelink received signal strength indicator
- the terminal can try to avoid using high-energy resources when selecting resources. Therefore, the terminal can preferentially select low-energy resources.
- the terminal selects a resource from set B with a moderate probability for data transmission.
- the PSCCH used to transmit control information is included in the PSSCH used to transmit data, which also means that the PSCCH and PSSCH must be sent at the same time. Therefore, the current standard only supports the initial transmission of the current transport block (TB) to reserve the retransmission of the current TB, the retransmission of the current TB reserves the retransmission of the current TB, and the initial transmission or retransmission of the previous TB. Reserve the initial transmission or retransmission of the current TB.
- TB current transport block
- TB1 includes resource blocks x1, y1, and z1, and TB2 includes resource blocks x2, y2, and z2.
- the initial transmission resource x1 of TB1 can reserve the initial transmission resource x2 of TB2, the initial transmission resource x2 of TB2 can reserve the retransmission resources y2 and z2 of TB2, and the retransmission resource y2 of TB2 can reserve the retransmission resource z2 of TB2.
- PSCCH and PSSCH are sent at the same time, when a terminal device performs initial resource selection or resource reselection, the selected initial transmission resource cannot be indicated to other terminal devices. Only after the initial transmission can it be passed The PSCCH is initially transmitted to indicate its reserved resources to other terminal devices.
- the terminal generates a data packet at time n, and the terminal device needs to select a resource.
- the resource set A can be selected from the resource selection window.
- the resource selection window starts at time (n+T1) and ends at time (n+T2).
- T1 is greater than or equal to the sum of the data processing time of the terminal and the time required for resource selection, and T2 min ⁇ T2 ⁇ service delay requirement range.
- the terminal can perform resource listening from time (n-T0) to time n, and the value range of T0 is [100,1100] milliseconds. If the terminal hears the PSCCH, the terminal can measure the RSRP of the PSCCH or the RSRP of the PSSCH scheduled by the PSCCH. If the measured RSRP is greater than the RSRP threshold, and the reserved resources are determined to be within the resource selection window according to the resource reservation information in the control information transmitted in the PSCCH, the resources reserved by the PSCCH are excluded, and the resources remaining after the exclusion Form resource set A. After resource exclusion, the terminal randomly selects several resources from the resource set A as sending resources for its initial transmission and retransmission.
- the above RSRP threshold is determined by the priority carried in the PSCCH monitored by the terminal and the priority of the data to be sent by the terminal.
- the terminal can continuously listen for resources and record the results of the interception.
- the terminal can perform resource selection according to the previous listening results between time (n-T0) and time n.
- resource preemption is supported in NR-V2X.
- a high-priority UE can preempt resources of a low-priority UE to ensure priority transmission of services of a high-priority UE. Therefore, after the terminal performs resource exclusion, the set A may include resource blocks reserved by the low-priority terminal. For example, by adjusting the RSRP threshold, the terminal may exclude resources reserved by low-priority terminals.
- UE1 generates data and performs resource selection at time n, UE1 determines the resource selection window from time (n+T1) to time (n+T2) and the resource detection from time (n-T0) to time n. Listening window.
- UE1 listens to the PSCCH and PSSCH sent by UE2 at time (n-a), and determines that it reserves the resource x at time (n+b). After UE1 listens to the PSCCH sent by UE2, it learns that the priority carried in the PSCCH of UE2 is lower than the priority of the data to be sent, thereby raising the RSRP threshold, so that the measured RSRP of the signal sent by UE2 is lower than RSRP The probability of the threshold increases. When the measured RSRP is lower than the RSRP threshold, the UE1 will not exclude the resource x reserved by the UE2, that is, the resource set A still includes the resource x.
- UE1 If UE1 randomly selects the resource x reserved by UE2 in the resource set A after the resource exclusion, UE1 preempts the resource x. Conversely, if UE1 detects that the priority carried in the PSCCH of UE2 is higher than the priority of its own data to be sent, the RSRP threshold is lowered, so that the resources reserved by UE2 are more easily excluded, thereby avoiding using the same with high-priority UEs. Resource block.
- NR-V2X also supports re-evaluation (re-evaluation) after initial resource selection or resource reselection.
- the terminal generates data at time n, determines the resource listening window and the resource selection window, selects the resource, and selects the initial transmission resource x at time (n+a) and time (n+b) The retransmission resource y of and the retransmission resource z at time (n+c). After time n, the terminal will continue to listen to the PSCCH. Before time (n+a), if the terminal discovers that resource x, resource y, or resource z is reserved by other UEs through continuous listening, and the measured RSRP is higher than the RSRP threshold, the terminal will release the corresponding resources and meet the service requirements Re-select another resource on the premise of delay.
- the terminal After time (n+a), because the terminal has already sent PSCCH and PSSCH on resource x and reserved resources y and z, the terminal only discovers through continuous listening that a high-priority UE has reserved resources y and/ Or z, and RSRP is higher than the RSRP threshold, the terminal will release resources y and/or z, and reselect resources. If a low-priority UE reserves resources y and/or z, the terminal will not release resources y and/or z, because according to the resource preemption mechanism, if a low-priority UE discovers that its priority is higher than its priority through listening The terminal of which reserves resources y and/or z will actively release resources y and/or z, which can avoid resource conflicts.
- the initial transmission resources selected by the terminal may also preempt resources reserved by other low-priority UEs, and the terminal will not send any signal to inform the preempted low-priority UE before the initial transmission.
- the first-level UE releases the corresponding resources and reselects the resources, resulting in resource collision.
- UE1 after UE1 generates a data packet at time n, it can determine the resource selection window and the resource listening window and perform resource selection.
- UE1 listens, UE2 sends PSCCH and PSSCH at time (n-a) and reserves resource x at time (n+b).
- UE1 After UE1 listened to the PSCCH of UE2 in the resource listening window, it found that the priority carried in the PSCCH of UE2 was lower than the priority of the data to be sent by itself. According to the above, by adjusting the RSRP threshold, UE1 did not exclude UE2 Reserved resources x. Assume that UE1 selects resource x for the initial transmission, and selects the retransmission resource y.
- UE2 has been continuously listening after sending PSCCH and PSSCH at time (na), but until time (n+b), UE1 has not sent any signal to tell UE2 to release resource x and reselect (because UE1 at time (n+b) will be the first transmission, will send PSCCH and PSSCH). Therefore, UE1 and UE2 may use resource x at the same time, resource collision occurs, UE1 and UE2 are interference sources for each other, and communication reliability is reduced.
- UE1 has a service arrives at time n, UE1 selects resources, and selects the initial transmission resource x at time (n+a), and the retransmission resource y at time (n+b) and time (n+c) and z.
- UE1 sends the initial transmission data at time (n+a), and through re-evaluation before time (n+b)
- a high-priority UE preempts the resource y selected by UE1 at time n, according to the resource preemption
- UE1 needs to release resource y and reselect resources for retransmission. If the reselection of resource y is selected according to a method similar to that in Fig. 8, since other UEs cannot know the resource reselected by the terminal, there will also be a resource collision problem, that is, the resource reselected by UE1 may be as low as possible.
- the resources reserved by the priority UE conflict is possible.
- the embodiment of the present application provides a method for resource selection, which can avoid resource conflicts and help improve communication reliability.
- the terminal can perform resource preemption.
- the terminal can decide whether to perform resource preemption according to the result of the measured channel busy ratio (CBR). For example, when the CBR is high, the terminal performs resource preemption; when the CBR is low, the terminal does not perform resource preemption.
- CBR channel busy ratio
- CBR indicates the occupancy rate of the channel by other terminals.
- a higher CBR indicates a higher channel occupancy rate and requires the terminal to preempt resources to use resources;
- a lower CBR indicates a lower channel occupancy rate and the channel is relatively idle, and the terminal may not need to perform Resources can be used by preempting resources.
- the terminal determining that resource preemption is required may indicate that the terminal has activated resource preemption.
- the terminal activates resource preemption
- the terminal can exclude the corresponding resources in the resource selection window according to the result of listening in the resource listening window, and the remaining unexcluded resources form the resource set A.
- resource set A there are not only blank resources not reserved by other UEs, but also resources reserved by other UEs but whose RSRP measurement value is lower than the RSRP threshold. The blank resources not reserved by other UEs are recorded. It is resource collection B.
- the resources used by the terminal for initial transmission are randomly selected from resource set B with medium probability, and the resources used for terminal retransmission are randomly selected from resource set A with medium probability.
- resource set B is an empty set or resource set B only includes resources in resource set A with the highest time domain order (the last time domain position)
- the resources used by the terminal for initial transmission are randomly selected from resource set A with medium probability.
- the method of the embodiment of the present application may include steps S910 to S920.
- the first terminal device performs initial resource selection, or the first terminal device has data arriving and triggers resource reselection under certain conditions, or the first terminal device determines that its reserved resources are successfully preempted by other terminal devices .
- the first terminal device selects the first resource from the first resource set, where the first resource set does not include resources reserved by other terminal devices in the resource selection window.
- the first terminal device performs data transmission on the first resource.
- Triggering the terminal device to perform initial resource selection may refer to that the terminal device is initially connected to the network and when data arrives, the terminal device can be triggered to perform the initial resource selection.
- the network device can configure a certain number of resources for the terminal device, such as m resources. Each time the terminal device uses a resource, the number of resources is reduced by 1. When the number of resources is reduced to 0 and the terminal device has data to transmit, It will trigger the terminal device to reselect resources.
- the first terminal device determines that its reserved resources are successfully preempted by other terminal devices means that the first terminal device has sent resource reservation information through initial transmission or retransmission, indicating its reserved resources, such as instructing it to reserve The resource is resource a.
- the first terminal device discovers through listening that other high-priority UE2 also reserves resource a, and detects that the signal quality of the PSCCH or PSSCH sent by UE2 is higher than the preset threshold, it indicates the resources reserved by the first terminal device Successfully preempted by other terminal equipment. This means that the UE2 succeeds in preempting the resource a. In this case, the first terminal device needs to abandon the resource a and reselect the resource a again.
- this embodiment of the application can select from the first resource set, that is, select the first resource from the first resource set, and the first resource set does not include reservations by other terminal devices.
- the first resource set may be the above-mentioned resource set B that only includes blank resources.
- the first terminal device When the first terminal device selects the first resource, it can exclude all the resources reserved by other terminal devices in the resource selection window according to the listening result in the resource listening window, and only remove the resources that are not in the resource selection window. Select from the blank resources reserved by other terminal devices, which can avoid conflicts with resources reserved by low-priority UEs, which is beneficial to improving communication reliability.
- the time range corresponding to the resource listening window can be [n-T0,n], time n is the time when the first terminal device needs to perform initial resource selection, or time n is the first terminal device has data arrived and triggered under certain conditions
- time reselection, or time n is the time when the first terminal device determines that its reserved resources are successfully preempted by other terminal devices.
- T0 can be predefined in the protocol, and the value range of T0 can be [100,1100] milliseconds.
- the time range corresponding to the resource selection window can be [n+T1, n+T2], T1 is greater than 0, T2 is greater than T1, and time n is the time when the first terminal device needs to perform initial resource selection, or time n is the The time when data arrives at the first terminal device and triggers resource reselection under certain conditions, or time n is the time when the first terminal device determines that its reserved resources are successfully preempted by other terminal devices.
- T2 is determined according to the maximum transmission delay of the data to be transmitted in the first terminal device, that is, the selection of T2 needs to meet the delay requirement of data transmission.
- the transmission delay of the data to be transmitted in the first terminal device is 50ms. If the first terminal device has data arriving at time n and triggers initial resource selection or resource reselection, then T2 ⁇ 50ms; if the data arrives The time at is time (nm), and the terminal device has performed the initial data transmission. After the initial transmission, the first terminal device determines that its reserved resources are successfully preempted by other terminal devices at time n, then (T2+m) ⁇ 50ms .
- the first resource can be the initial resource.
- the terminal device may select the initial transmission resource from the first resource set.
- the first terminal device may select the retransmission resource from the second resource set. After selecting the retransmission resource, the terminal device can send the retransmission data on the retransmission resource.
- the second resource set may include resources that are not reserved by other terminal devices in the resource selection window and resources that meet the first condition, and the range of the second resource set is greater than or equal to the range of the first resource set.
- the second resource set may be the set A described above.
- the resource that satisfies the first condition may be, for example, a resource reserved by other terminal equipment through the first PSCCH.
- the first PSCCH is a PSCCH whose signal quality is less than a first preset threshold or the signal quality of a scheduled PSSCH is less than a second preset threshold.
- the first preset threshold and/or the second preset threshold may be configured by the network device to the first terminal device.
- the first preset threshold and the second preset threshold may be equal or not equal.
- the network device can configure the terminal device with the priority of the data transmitted by other terminal devices-the priority of the data to be transmitted by the first terminal device, and the relationship between the preset threshold.
- the terminal device can determine the first terminal device based on the priority information.
- a preset threshold and/or a second preset threshold Since the priority of data transmitted by different terminal devices is different, for different terminal devices, the first preset threshold value may be different, and the second preset threshold value may also be different.
- the terminal device selects retransmission resources, it can exclude the resources reserved by other terminal devices and have relatively high signal quality in the resource selection window according to the listening results in the resource listening window, and there is no excluded resource composition
- the second resource set the terminal device selects the retransmission resource from the second resource set.
- the second resource set includes resources that are not reserved by other terminal devices and resources that are reserved by other terminal devices but have poor signal quality.
- the retransmission resource is the resource used by the terminal device for data transmission after the initial transmission
- the first terminal device uses the retransmission resource, it has already indicated its reserved retransmission resources to other devices through the initial transmission, and other terminals
- the device can listen to the initial transmission resource of the first terminal device to give up or preempt the retransmission resource. For example, a terminal device with poor signal quality can abandon the use of retransmission resources, and the resource reserved by a terminal device with higher signal quality has been excluded from the second resource set by the first terminal device, so that the first terminal The retransmission resources selected by the device will not conflict with the resources reserved by other terminal devices, which is conducive to improving communication performance.
- the signal quality may be expressed by at least one of the following: RSRP, reference signal receiving quality (RSRQ), received signal strength indication (RSSI), signal to interference plus noise ratio (signal-to-interference-and-noise-ratio, SINR).
- RSRP reference signal receiving quality
- RSSI received signal strength indication
- SINR signal to interference plus noise ratio
- UE1 activates resource preemption, and when data arrives at time n, UE1 can determine from time (n+T1) to time (n+T2) according to the listening results in the listening window from time (n-T0) to time n
- the resources in the resource selection window are screened, and the screened resources form resource set A.
- the resource set A includes resources ⁇ x, y, z, m, n, k ⁇ .
- resources z, m, n, and k are blank resources not reserved by other UEs, and resources x and y are resources reserved by UE2 and UE3 but whose RSRP measurement value is lower than the RSRP threshold.
- Blank resources z, m, n, and k can form resource set B.
- the resources used by the UE1 for the initial transmission can be randomly selected from the resource set B with a medium probability.
- the resources used by the UE1 for retransmission can be randomly selected from the resource set A with a medium probability.
- the time domain position of the retransmission resource must be after the time domain position of the initial transmission resource.
- UE1 When UE1 selects resources from resource set A and resource set B, it is randomly selected with equal probability. This can prevent multiple UEs from selecting the same resource, which is beneficial to reduce the probability of resource conflicts.
- the first terminal device may select the first resource from the second resource set.
- the first resource set is empty, it means that all resources in the resource selection window are resources reserved for other terminal devices.
- the second condition is that all the resources in the first resource set are resources whose time domain positions in the second resource set are higher than the third preset threshold, that is, the first resource set only includes the resources in the second resource set. Resources with a lower domain location.
- the first resource set includes resources m and n, and resources m and n are the resources with the highest temporal position in the second resource set, or resources m and n are the resources with the highest and second-highest temporal position in the second resource set, respectively .
- the resource reserved by the first terminal device and successfully preempted by other terminal devices is the retransmission resource.
- the terminal device may select a reselection resource for the retransmission resource from the first resource set.
- the first resource set does not include resources reserved by other terminal devices.
- the first terminal device determines that the resource reserved by the first terminal device and successfully preempted by other terminal devices includes at least one resource, and the target resource is the resource with the highest position in the time domain among the at least one resource.
- the terminal device may select a reselection resource for the target resource from the first resource set.
- the terminal device can exclude that the distance from the time domain location of the resource that does not perform resource reselection is less than the preset value Resources.
- the terminal device does not want to retransmit one piece of data twice in one time slot. Therefore, in order to avoid reselecting resources and resources that are not subject to resource reselection falling into one time slot, the terminal device can compare and not retransmit resources. All resources in the time slot where the selected resource is located are excluded from the first resource set, that is, the first resource set does not include all resources in the time slot where the resource reserved by the first terminal device is not subject to resource reselection.
- the first terminal device may select from the third resource set.
- the first terminal device may select a second resource from a third resource set.
- the second resource is a reselection resource for at least one resource other than the target resource.
- the third resource set includes the resource selection window. Resources that are not reserved by other terminal devices and resources that meet the first condition.
- the resource that satisfies the first condition may be, for example, a resource reserved by other terminal equipment through the first PSCCH.
- the first PSCCH is a PSCCH whose signal quality is less than a first preset threshold or the signal quality of a scheduled PSSCH is less than a second preset threshold.
- the first preset threshold and/or the second preset threshold may be configured by the network device to the first terminal device.
- the first preset threshold and the second preset threshold may be equal or not equal.
- the network device can configure the terminal device with the priority of the data transmitted by other terminal devices-the priority of the data to be transmitted by the first terminal device, and the relationship between the preset threshold.
- the terminal device can determine the first terminal device based on the priority information.
- a preset threshold and/or a second preset threshold Since the priority of data transmitted by different terminal devices is different, for different terminal devices, the first preset threshold value may be different, and the second preset threshold value may also be different.
- the third resource set may not include resources whose distances from the time domain positions of the resources for which resource reselection is not performed are less than a preset value. For example, the third resource set does not include all resources in the time slot where the resources reserved by the first terminal device without resource reselection are located.
- the solution of the embodiment of the present application may be for a scenario where PSCCH and PSSCH are simultaneously transmitted.
- a terminal device simultaneously transmits PSCCH and PSSCH on the selected first resource, second resource, and/or reselection resource, where the PSCCH may carry
- the resource reservation information of the first terminal device carries the resource location reserved by the first terminal device.
- the resource location reserved by the first terminal device may include a time domain location and/or a frequency domain location.
- UE1 activates resource preemption, and when a service arrives at time n, UE1 completes resource selection. At time (n+a), UE1 finds through re-evaluation that a high-priority UE preempts the resource selected by UE1 at time n, and UE1 needs to reselect the preempted resource.
- UE1 selects resources x, y, and z.
- time (n+a) if UE1 finds that resource y is preempted by a high-priority UE through continuous listening, and the RSRP measurement value is higher than the RSRP threshold, UE1 reselects resource y.
- the manner in which UE1 performs resource reselection at time (n+a) is similar to the manner in which resource selection is performed at time n in FIG. 10.
- UE1 can, according to the listening results in the resource listening window from time (n+a-T0) to time (n+a), determine from time (n+a+T1) to time (n+a+T2) To filter the resources in the resource selection window.
- T2 The selection of T2 should meet the transmission delay requirements of the current service. Since the current service arrives at time n, (a+T2) ⁇ service transmission delay.
- resource set A When the UE performs resource screening, it also needs to exclude all resources in the time slot where the resource that does not perform resource reselection is located. Assuming that UE1 only reselects resource y, all resources in the time slot where resource z is located should be excluded by UE1, otherwise UE1 may send data on two resources in the same time slot at the same time. After UE1 performs the foregoing resource exclusion, the set of remaining resources is denoted as resource set A.
- the blank resources in the resource set A that are not reserved by other UEs form the resource set B.
- UE1 will sort all the resources that require resource reselection in the time domain.
- the reselection of the resource with the lowest time domain order (the time domain position is at the top) will be randomly selected in resource set B with a medium probability, and for the remaining resources
- the reselection is randomly selected in resource set A with medium probability.
- UE1 directly searches resource set B for reselection resources for resource y.
- UE1 searches for reselection resources for resource y in resource set B, and searches for reselection resources for resource z in resource set A.
- the time domain position of the reselection resource of resource z should be arranged after the time domain position of the reselection resource of resource y.
- the first terminal device may select the first resource from the third resource set.
- the first resource set is empty, it means that all resources in the resource selection window are resources reserved for other terminal devices.
- the second condition is that all resources in the first resource set are resources whose time-domain positions in the third resource set are higher than the third preset threshold, that is, the first resource set only includes the resources in the third resource set. Resources with a lower domain location.
- the first resource set includes resources m and n, and resources m and n are the resources with the highest temporal position in the third resource set, or resources m and n are the resources with the highest and second highest temporal position in the third resource set, respectively .
- the low-priority UE described above may refer to the lower priority carried in the PSCCH sent by the UE.
- the initial transmission resource and the retransmission resource may be selected at the same time.
- the terminal device selects the initial transmission resource and all retransmission resources before the initial transmission.
- the initial transmission of UE1 will preferentially select blank resources not reserved by other UEs.
- active resource preemption if the initial transmission of UE1 preferentially selects blank resources, that is, the resources reserved by the low-priority UE will not be preempted, only retransmission will preempt the resources reserved by the low-priority UE.
- UE1's retransmission preempts the resource x reserved by UE2, from time n to time (n+b)
- UE1 will send the PSCCH and PSSCH of the initial transmission. And UE2 will continue to listen from time (n-a) to time (n+b).
- UE2 When it listens to the PSCCH sent by UE1, UE2 will release resource x and reselect, so as to avoid resource collision. In addition, no matter whether resource preemption is activated or not, the method described in the embodiment of the present application can improve the communication reliability of UE1's initial transmission.
- the resource preemption described in the embodiments of the present application refers to that a high-priority UE can preempt resources reserved by a low-priority UE.
- the wireless communication method according to the embodiment of the present application is described in detail above.
- the device according to the embodiment of the present application will be described below in conjunction with FIG. 12 to FIG. 15.
- the technical features described in the method embodiment are applicable to the following device embodiments.
- FIG. 12 is a schematic block diagram of a terminal device provided by an embodiment of the present application.
- the terminal device may be any terminal device described above.
- the terminal device may be the first terminal device described above.
- the terminal device 1200 shown in FIG. 12 includes a processing unit 1210 and a communication unit 1220, where:
- the processing unit 1210 is configured to perform initial resource selection on the first terminal device, or the first terminal device has data arriving and trigger resource reselection under certain conditions, or the first terminal device determines that its reserved resources are In the case that other terminal devices successfully preempt, the first resource is selected from the first resource set, and the first resource set does not include the resources reserved by other terminal devices in the resource selection window.
- the communication unit 1220 is configured to perform data transmission on the first resource.
- the processing unit 1210 is configured to: when the first terminal device performs initial resource selection, or the first terminal device has data arriving and triggers resource reselection under certain conditions, from the Select the initial resource from the first resource collection.
- the processing unit 1210 is configured to: select retransmission resources from a second resource set, where the second resource set includes resources that are not reserved by other terminal devices in the resource selection window and satisfy the first Conditional resources; the communication unit 1220 is used to send retransmission data on the retransmission resources.
- the resources reserved by the first terminal device and successfully preempted by other terminal devices are retransmission resources.
- the first terminal device determines that the resource reserved by the first terminal device and successfully preempted by other terminal devices includes at least one resource, and the target resource is the resource with the highest position in the time domain among the at least one resource; the processing The unit 1210 is configured to select a reselection resource for the target resource from the first resource set.
- the processing unit 1210 is configured to select a second resource from a third resource set, where the third resource set includes resources that are not reserved by the other terminal device in the resource selection window, and The resource of the first condition, the second resource is a reselection resource for resources other than the target resource in the at least one resource; the communication unit 1220 is configured to: send a reselection on the second resource Transfer data.
- the first resource set and/or the third resource set do not include all resources in the time slot where the resource reserved by the first terminal device is not reselected, and the resource reselection is not performed
- the selected resource is a resource reserved by the first terminal device and not successfully preempted by other terminal devices.
- the resource that meets the first condition is a resource reserved by other terminal equipment through the first physical side line control channel PSCCH, and the first PSCCH is a physical side whose signal quality is less than a first preset threshold or scheduled The signal quality of the line shared channel PSSCH is less than the PSCCH of the second preset threshold.
- the first preset threshold and/or the second preset threshold are configured by the network device to the first terminal device.
- the signal quality is represented by at least one of the following: reference signal received power RSRP, reference signal received quality RSRQ, received signal strength indicator RSSI, signal to interference plus noise ratio SINR.
- the resource reserved by the other terminal device through the first PSCCH is determined by the first terminal device by listening to the first PSCCH within a resource listening window.
- the time range corresponding to the resource listening window is [n-T0, n], and time n is the time when the first terminal device needs to perform initial resource selection, or time n is the first terminal device The time when data arrives and resource reselection is triggered under certain conditions, or time n is the time when the first terminal device determines that its reserved resources are successfully preempted by other terminal devices, and the T0 is predefined in the protocol.
- the time range corresponding to the resource selection window is [n+T1, n+T2], T1 is greater than 0, T2 is greater than T1, and time n is the time when the first terminal device needs to perform initial resource selection, or Time n is the time when the first terminal device has data arrived and resource reselection is triggered under certain conditions, or time n is the time when the first terminal device determines that its reserved resources are successfully preempted by other terminal devices.
- the T2 is determined according to the maximum transmission delay of data.
- the communication unit 1220 is configured to simultaneously send PSCCH and PSSCH on the first resource.
- the PSCCH is used to indicate the resource location reserved by the first terminal device.
- the processing unit 1210 is configured to: when the first resource set is empty or the first resource set satisfies a second condition, select the second resource set or the third resource set The first resource; wherein the second resource set and the third resource set include resources not reserved by the other terminal devices in the resource selection window, and resources reserved by other terminal devices through the first PSCCH
- the first PSCCH is a PSCCH whose signal quality is less than a preset threshold or the signal quality of a scheduled PSSCH is less than a preset threshold;
- the second condition is that all resources in the first resource set are the second The resource set or the resource whose time domain position is higher than the third preset threshold in the third resource set.
- the second condition is that all resources in the set are the resources with the highest time domain position in the second resource set or the third resource set.
- the above-mentioned communication module may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
- the aforementioned determining module may be one or more processors.
- FIG. 13 is a schematic structural diagram of a communication device 1300 according to an embodiment of the present application.
- the communication device 1300 shown in FIG. 13 includes a processor 1310, and the processor 1310 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
- the communication device 1300 may further include a memory 1320.
- the processor 1310 can call and run a computer program from the memory 1320 to implement the method in the embodiment of the present application.
- the memory 1320 may be a separate device independent of the processor 1310, or may be integrated in the processor 1310.
- the communication device 1300 may further include a transceiver 1330, and the processor 1310 may control the transceiver 1330 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.
- the transceiver 1330 may include a transmitter and a receiver.
- the transceiver 1330 may further include an antenna, and the number of antennas may be one or more.
- the communication device 1300 may specifically be a network device of an embodiment of the application, and the communication device 1300 may implement the corresponding process implemented by the network device in each method of the embodiment of the application. For brevity, details are not repeated here. .
- the communication device 1300 may specifically be a mobile terminal/terminal device of an embodiment of the present application.
- the communication device 1300 may be a first terminal device, and the communication device 1300 may implement various methods in the embodiments of the present application.
- the corresponding process implemented by the mobile terminal/terminal device will not be repeated here.
- Fig. 14 is a schematic structural diagram of a device according to an embodiment of the present application.
- the apparatus 1400 shown in FIG. 14 includes a processor 1410, and the processor 1410 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
- the apparatus 1400 may further include a memory 1420.
- the processor 1410 may call and run a computer program from the memory 1420 to implement the method in the embodiment of the present application.
- the memory 1420 may be a separate device independent of the processor 1410, or may be integrated in the processor 1410.
- the device 1400 may further include an input interface 1430.
- the processor 1410 can control the input interface 1430 to communicate with other devices or devices, and specifically, can obtain information or data sent by other devices or devices.
- the device 1400 may further include an output interface 1440.
- the processor 1410 can control the output interface 1440 to communicate with other devices or devices, and specifically, can output information or data to other devices or devices.
- the device can be applied to the network equipment in the embodiments of the present application, and the device can implement the corresponding processes implemented by the network equipment in the various methods of the embodiments of the present application.
- the device can implement the corresponding processes implemented by the network equipment in the various methods of the embodiments of the present application.
- details are not described herein again.
- the device can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the device can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
- the device can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
- the device can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
- the device mentioned in the embodiment of the present application may be a chip, and the chip may also be called a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-chip.
- FIG. 15 is a schematic block diagram of a communication system 1500 according to an embodiment of the present application. As shown in FIG. 15, the communication system 1500 includes a first terminal device 1510 and other terminal devices 1520.
- the first terminal device 1510 can be used to implement the corresponding function implemented by the first terminal device in the above method
- the other terminal device 1520 can be used to implement the corresponding function implemented by the other terminal device in the above method.
- I won’t repeat it here.
- the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capability.
- the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
- the above-mentioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
- DSP Digital Signal Processor
- ASIC application specific integrated circuit
- FPGA Field Programmable Gate Array
- the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
- the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
- the steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
- the software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
- the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
- the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
- the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
- the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
- RAM random access memory
- SRAM static random access memory
- DRAM dynamic random access memory
- DRAM synchronous dynamic random access memory
- DDR SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
- Enhanced SDRAM, ESDRAM Enhanced Synchronous Dynamic Random Access Memory
- Synchronous Link Dynamic Random Access Memory Synchronous Link Dynamic Random Access Memory
- DR RAM Direct Rambus RAM
- the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.
- the embodiments of the present application also provide a computer-readable storage medium for storing computer programs.
- the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
- the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
- the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application , For the sake of brevity, I won’t repeat it here.
- the embodiments of the present application also provide a computer program product, including computer program instructions.
- the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
- the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
- the computer program product can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, For the sake of brevity, I will not repeat them here.
- the embodiment of the present application also provides a computer program.
- the computer program can be applied to the network device in the embodiment of the present application.
- the computer program runs on the computer, it causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
- I won’t repeat it here.
- the computer program can be applied to the mobile terminal/terminal device in the embodiment of the present application.
- the computer program runs on the computer, the computer executes each method in the embodiment of the present application. For the sake of brevity, the corresponding process will not be repeated here.
- the disclosed system, device, and method can be implemented in other ways.
- the device embodiments described above are merely illustrative.
- the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined It can be integrated into another system, or some features can be ignored or not implemented.
- the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
- the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
- the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
- the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
- the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disks or optical disks and other media that can store program codes. .
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Abstract
Provided are a resource selection method, and a device, which can avoid the occurrence of a conflict with resources reserved by other terminal devices, thereby facilitating an improvement in the communication performance. The method comprises: when a first terminal device performs initial resource selection, or the first terminal device has arriving data and triggers resource re-selection under certain conditions, or the first terminal device determines that the resources reserved thereby are successfully preempted by other terminal devices, the first terminal device selecting a first resource from a first resource set, wherein the first resource set does not comprise resources reserved by other terminal devices in a resource selection window; and the first terminal device performing data transmission on the first resource.
Description
本申请涉及通信领域,并且更具体地,涉及一种选择资源的方法及设备。This application relates to the field of communications, and more specifically, to a method and device for selecting resources.
在设备到设备(device to device,D2D)或车辆到其他设备(vehicle to everything,V2X)场景中,终端设备可以通过侦听的方式在资源池中选取传输资源,然后终端设备可以通过发送物理侧行控制信道(physical sidelink control channel,PSCCH)向其他终端设备指示其选择的资源位置。对于某些特殊场景,PSCCH和物理侧行共享信道(physical sidelink shared channel,PSSCH)是同时发送的,这也就意味着终端设备只有在初传之后,才能向其他终端设备指示其预留的传输资源。In the device-to-device (D2D) or vehicle-to-everything (V2X) scenario, the terminal device can select transmission resources in the resource pool by listening, and then the terminal device can send the physical side The line control channel (physical sidelink control channel, PSCCH) indicates the selected resource location to other terminal devices. For some special scenarios, the PSCCH and the physical sidelink shared channel (PSSCH) are sent at the same time, which means that the terminal device can only indicate its reserved transmission to other terminal devices after the initial transmission. Resources.
对于初始资源选择或有数据到达并在一定条件下触发资源重选,或者终端设备确定其预留的资源被其他终端设备成功抢占的情况下,终端设备选择的传输资源可能会与其他终端设备预留的传输资源发生冲突,这样不利于数据的传输。For initial resource selection or when data arrives and resource reselection is triggered under certain conditions, or the terminal device determines that its reserved resources are successfully preempted by other terminal devices, the transmission resources selected by the terminal device may be pre-matched with other terminal devices. The reserved transmission resources conflict, which is not conducive to data transmission.
发明内容Summary of the invention
本申请提供一种选择资源的方法及设备,能够避免与其他终端设备预留的资源发生冲突,有利于提高通信性能。The present application provides a method and device for selecting resources, which can avoid conflicts with resources reserved by other terminal devices, and is beneficial to improving communication performance.
第一方面,提供了一种选择资源的方法,包括:在第一终端设备进行初始资源选择、或所述第一终端设备有数据到达并在一定条件下触发资源重选、或所述第一终端设备确定其预留的资源被其他终端设备成功抢占的情况下,所述第一终端设备从第一资源集合中选择第一资源,所述第一资源集合不包括资源选择窗内被其他终端设备预留的资源;所述第一终端设备在所述第一资源上进行数据传输。In a first aspect, a method for selecting resources is provided, including: performing initial resource selection on a first terminal device, or the first terminal device has data arriving and triggering resource reselection under certain conditions, or the first terminal device When the terminal device determines that its reserved resources are successfully preempted by other terminal devices, the first terminal device selects the first resource from the first resource set, and the first resource set does not include the resource selection window being used by other terminals A resource reserved by the device; the first terminal device performs data transmission on the first resource.
第二方面,提供了一种终端设备,用于执行上述第一方面或其各实现方式中的方法。In a second aspect, a terminal device is provided, which is used to execute the method in the first aspect or its implementation manners.
具体地,该终端设备包括用于执行上述第一方面或其各实现方式中的方法的功能模块。Specifically, the terminal device includes a functional module for executing the method in the foregoing first aspect or each of its implementation manners.
第三方面,提供了一种终端设备,包括处理器和存储器。该存储器用于存储计算机程序,该处理器用于调用并运行该存储器中存储的计算机程序,执行上述第一方面或其各实现方式中的方法。In a third aspect, a terminal device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the above-mentioned first aspect or each of its implementation modes.
第四方面,提供了一种装置,用于实现上述第一方面或其各实现方式中的方法。In a fourth aspect, a device is provided for implementing the method in the above-mentioned first aspect or each of its implementation manners.
具体地,该装置包括:处理器,用于从存储器中调用并运行计算机程序,使得安装有该装置的设备执行如上述第一方面或其各实现方式中的方法。Specifically, the device includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the device executes the method in the first aspect or its implementation manners.
第五方面,提供了一种计算机可读存储介质,用于存储计算机程序,该计算机程序使得计算机执行上述第一方面或其各实现方式中的方法。In a fifth aspect, a computer-readable storage medium is provided for storing a computer program that enables a computer to execute the method in the above-mentioned first aspect or each of its implementation manners.
第六方面,提供了一种计算机程序,当其在计算机上运行时,使得计算机执行上述第一方面或其各实现方式中的方法。In a sixth aspect, a computer program is provided, which when run on a computer, causes the computer to execute the method in the first aspect or its implementation manners.
基于上述技术方案,第一终端设备在针对第一资源进行资源选择时,仅从未被其他终端设备预留的资源集合中进行选择,这样能够避免选择的资源与其他终端设备预留的资源发生冲突,有利于提高通信性能。Based on the above technical solution, when the first terminal device selects resources for the first resource, it only selects from the set of resources that have not been reserved by other terminal devices, which can avoid the occurrence of selected resources and resources reserved by other terminal devices. Conflict helps to improve communication performance.
图1是本申请实施例应用的无线通信系统的示意图。Fig. 1 is a schematic diagram of a wireless communication system applied in an embodiment of the present application.
图2是本申请实施例提供的车联网中两种传输模式的示意图。Fig. 2 is a schematic diagram of two transmission modes in the Internet of Vehicles provided by an embodiment of the present application.
图3是本申请实施例提供的一种通过侦听进行资源选取的方法的示意图。Fig. 3 is a schematic diagram of a method for resource selection through interception provided by an embodiment of the present application.
图4是本申请实施例提供的一种PSCCH和PSSCH的物理层结构的示意图。Fig. 4 is a schematic diagram of a physical layer structure of PSCCH and PSSCH provided by an embodiment of the present application.
图5是本申请实施例提供的一种资源预留方式的示意图。Fig. 5 is a schematic diagram of a resource reservation method provided by an embodiment of the present application.
图6是本申请实施例提供的一种资源选择方式的示意图。Fig. 6 is a schematic diagram of a resource selection method provided by an embodiment of the present application.
图7是本申请实施例提供的另一种资源选择方式的示意图。Fig. 7 is a schematic diagram of another resource selection method provided by an embodiment of the present application.
图8是本申请实施例提供的另一种资源选择方式的示意图。Fig. 8 is a schematic diagram of another resource selection method provided by an embodiment of the present application.
图9是本申请实施例提供的一种选择资源的方法的示意性流程图。FIG. 9 is a schematic flowchart of a method for selecting resources according to an embodiment of the present application.
图10是本申请实施例提供的另一种资源选择方式的示意图。FIG. 10 is a schematic diagram of another resource selection method provided by an embodiment of the present application.
图11是本申请实施例提供的另一种资源选择方式的示意图。Fig. 11 is a schematic diagram of another resource selection method provided by an embodiment of the present application.
图12是本申请实施例提供的的终端设备的示意性框图。FIG. 12 is a schematic block diagram of a terminal device provided by an embodiment of the present application.
图13是本申请实施例提供的的通信设备的示意性结构图。FIG. 13 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
图14是本申请实施例提供的的装置的示意性结构图。Fig. 14 is a schematic structural diagram of a device provided by an embodiment of the present application.
图15是本申请实施例提供的通信系统的示意性结构图。FIG. 15 is a schematic structural diagram of a communication system provided by an embodiment of the present application.
图1是本申请实施例的系统100的示意图。Fig. 1 is a schematic diagram of a system 100 according to an embodiment of the present application.
如图1所示,终端设备110与第一通信系统下的第一网络设备130和第二通信系统下的第二网络设备120相连,例如,该第一网络设备130为长期演进(Long Term Evolution,LTE)下的网络设备,该第二网络设备120为新空口(New Radio,NR)下的网络设备。As shown in FIG. 1, the terminal device 110 is connected to a first network device 130 in a first communication system and a second network device 120 in a second communication system. For example, the first network device 130 is a Long Term Evolution (Long Term Evolution). , A network device under LTE), and the second network device 120 is a network device under a New Radio (NR).
其中,该第一网络设备130和该第二网络设备120下可以包括多个小区。Wherein, the first network device 130 and the second network device 120 may include multiple cells.
应理解,图1是本申请实施例的通信系统的示例,本申请实施例不限于图1所示。It should be understood that FIG. 1 is an example of a communication system in an embodiment of the present application, and the embodiment of the present application is not limited to that shown in FIG. 1.
作为一个示例,本申请实施例适应的通信系统可以包括至少该第一通信系统下的多个网络设备和/或该第二通信系统下的多个网络设备。As an example, the communication system to which the embodiment of the present application is adapted may include at least multiple network devices under the first communication system and/or multiple network devices under the second communication system.
例如,图1所示的系统100可以包括第一通信系统下的一个主网络设备和第二通信系统下的至少一个辅助网络设备。至少一个辅助网络设备分别与该一个主网络设备相连,构成多连接,并分别与终端设备110连接为其提供服务。具体地,终端设备110可以通过主网络设备和辅助网络设备同时建立连接。For example, the system 100 shown in FIG. 1 may include one main network device under the first communication system and at least one auxiliary network device under the second communication system. At least one auxiliary network device is respectively connected to the one main network device to form multiple connections, and is connected to the terminal device 110 to provide services for it. Specifically, the terminal device 110 may simultaneously establish a connection through the main network device and the auxiliary network device.
可选地,终端设备110和主网络设备建立的连接为主连接,终端设备110与辅助网络设备建立的连接为辅连接。终端设备110的控制信令可以通过主连接进行传输,而终端设备110的数据可以通过主连接以及辅连接同时进行传输,也可以只通过辅连接进行传输。Optionally, the connection established between the terminal device 110 and the main network device is the main connection, and the connection established between the terminal device 110 and the auxiliary network device is the auxiliary connection. The control signaling of the terminal device 110 may be transmitted through the main connection, and the data of the terminal device 110 may be transmitted through the main connection and the auxiliary connection at the same time, or may be transmitted only through the auxiliary connection.
作为又一示例,本申请实施例中的第一通信系统和第二通信系统不同,但对第一通信系统和该第二通信系统的具体类别不作限定。As another example, the first communication system and the second communication system in the embodiments of the present application are different, but the specific types of the first communication system and the second communication system are not limited.
例如,该第一通信系统和该第二通信系统可以是各种通信系统,例如:全球移动通讯(Global System of Mobile communication,GSM)系统、码分多址(Code Division Multiple Access,CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)系统、通用分组无线业务(General Packet Radio Service,GPRS)、长期演进(Long Term Evolution,LTE)系统、LTE时分双工(Time Division Duplex,TDD)、通用移动通信系统(Universal Mobile Telecommunication System,UMTS)等。For example, the first communication system and the second communication system may be various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD) ), Universal Mobile Telecommunication System (UMTS), etc.
所述主网络设备和所述辅助网络设备可以为任意接入网设备。The main network equipment and the auxiliary network equipment may be any access network equipment.
可选地,在一些实施例中,所述接入网设备可以是全球移动通讯(Global System of Mobile communication,GSM)系统或码分多址(Code Division Multiple Access,CDMA)中的基站(Base Transceiver Station,BTS),也可以是宽带码分多址(Wideband Code Division Multiple Access,WCDMA)系统中的基站(NodeB,NB),还可以是长期演进(Long Term Evolution,LTE)系统中的演进型基站(Evolutional Node B,eNB或eNodeB)。Optionally, in some embodiments, the access network device may be a base station (Base Transceiver) in the Global System of Mobile Communications (GSM) system or Code Division Multiple Access (CDMA). Station, BTS), can also be a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, or an evolved base station in a Long Term Evolution (LTE) system (Evolutional Node B, eNB or eNodeB).
可选地,所述接入网设备还可以是下一代无线接入网(Next Generation Radio Access Network,NG RAN),或者是NR系统中的基站(gNB),或者是云无线接入网络(Cloud Radio Access Network,CRAN)中的无线控制器,或者该接入网设备可以为中继站、接入点、车载设备、可穿戴设备,或者未来演进的公共陆地移动网络(Public Land Mobile Network,PLMN)中的网络设备等。Optionally, the access network device may also be a Next Generation Radio Access Network (NG RAN), or a base station (gNB) in an NR system, or a cloud radio access network (Cloud The radio controller in Radio Access Network (CRAN), or the access network device can be a relay station, access point, in-vehicle device, wearable device, or the public land mobile network (PLMN) that will evolve in the future Network equipment, etc.
在图1所示的系统100中,以该第一网络设备130为主网络设备,以该第二网络设备120为辅助网络设备为例。In the system 100 shown in FIG. 1, the first network device 130 is taken as the main network device, and the second network device 120 is taken as an auxiliary network device as an example.
该第一网络设备130可以为LTE网络设备,该第二网络设备120可以为NR网络设备。或者该第一网络设备130可以为NR网络设备,第二网络设备120可以为LTE网络设备。或者该第一网络设备130和该第二网络设备120都可以为NR网络设备。或者该第一网络设备130可以为GSM网络设备,CDMA网络设备等,该第二网络设备120也可以为GSM网络设备,CDMA网络设备等。或者第一网络设备130可以是宏基站(Macrocell),第二网络设备120可以为微蜂窝基站(Microcell)、微微蜂窝基站(Picocell)或者毫微微蜂窝基站(Femtocell)等。The first network device 130 may be an LTE network device, and the second network device 120 may be an NR network device. Or, the first network device 130 may be an NR network device, and the second network device 120 may be an LTE network device. Or both the first network device 130 and the second network device 120 may be NR network devices. Alternatively, the first network device 130 may be a GSM network device, a CDMA network device, etc., and the second network device 120 may also be a GSM network device, a CDMA network device, or the like. Or the first network device 130 may be a Macrocell, and the second network device 120 may be a Microcell, Picocell, Femtocell, or the like.
可选地,所述终端设备110可以是任意终端设备,所述终端设备110包括但不限于:Optionally, the terminal device 110 may be any terminal device, and the terminal device 110 includes but is not limited to:
经由有线线路连接,如经由公共交换电话网络(Public Switched Telephone Networks,PSTN)、数字用户线路(Digital Subscriber Line,DSL)、数字电缆、直接电缆连接;和/或另一数据连接/网络;和/或经由无线接口,如,针对蜂窝网络、无线局域网(Wireless Local Area Network,WLAN)、诸如DVB-H网络的数字电视网络、卫星网络、AM-FM广播发送器;和/或另一终端设备的被设置成接收/发送通信信号的装置;和/或物联网(Internet of Things,IoT)设备。被设置成通过无线接口通信的终端设备可以被称为“无线通信终端”、“无线终端”或“移动终端”。移动终端的示例包括但不限于卫星或蜂窝电话;可以组合蜂窝无线电电话与数据处理、传真以及数据通信能力的个人通信系统(Personal Communications System,PCS)终端;可以包括无线电电话、寻呼机、因特网/内联网接入、Web浏览器、记事簿、日历以及/或全球定位系统(Global Positioning System,GPS)接收器的PDA;以及常规膝上型和/或掌上型接收器或包括无线电电话收发器的其它电子装置。终端设备可以指接入终端、用户设备(User Equipment,UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol,SIP)电话、无线本地环路(Wireless Local Loop,WLL)站、个人数字处理(Personal Digital Assistant,PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、5G网络中的终端设备或者未来演进的PLMN中的终端设备等。Connection via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection; and/or another data connection/network; and/ Or via a wireless interface, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters; and/or another terminal device A device configured to receive/send communication signals; and/or Internet of Things (IoT) equipment. A terminal device set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a "wireless terminal" or a "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, Internet/intranet PDA with internet access, web browser, memo pad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers or others including radio telephone transceivers Electronic device. Terminal equipment can refer to access terminals, user equipment (UE), user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks, or terminal devices in the future evolution of PLMN, etc.
应理解,本文中术语“系统”和“网络”在本文中常被可互换使用。It should be understood that the terms "system" and "network" in this article are often used interchangeably in this article.
可选地,终端设备120之间可以进行D2D通信。Optionally, D2D communication may be performed between the terminal devices 120.
可选地,5G系统或5G网络还可以称为NR系统或NR网络。Optionally, the 5G system or 5G network may also be referred to as NR system or NR network.
设备到设备通信是基于D2D的一种侧行链路(sidelink,SL)传输技术,与传统的蜂窝系统中通信数据通过基站接收或者发送的方式不同。车联网系统中也采用设备到设备直接通信的方式,因此具有更高的频谱效率以及更低的传输时延。关于设备到设备的通信,第三代合作伙伴计划(3rd generation partnership project,3GPP)定义了两种传输模式:模式A和模式B,如图2所示。Device-to-device communication is a D2D-based sidelink (SL) transmission technology, which is different from the way in which communication data is received or sent through a base station in a traditional cellular system. The device-to-device direct communication method is also adopted in the Internet of Vehicles system, so it has higher spectrum efficiency and lower transmission delay. Regarding device-to-device communication, the 3rd Generation Partnership Project (3GPP) defines two transmission modes: Mode A and Mode B, as shown in Figure 2.
模式A:终端的传输资源是由基站分配的,终端根据基站分配的资源在侧行链路上进行数据的发送;基站可以在下行链路(downlink,DL)为终端分配单次传输的资源,也可以为终端分配半静态传输的资源。Mode A: The transmission resources of the terminal are allocated by the base station, and the terminal transmits data on the side link according to the resources allocated by the base station; the base station can allocate resources for a single transmission to the terminal on the downlink (DL). It is also possible to allocate semi-static transmission resources to the terminal.
模式B:终端在资源池中选取一个资源进行数据的传输。具体的,终端可以通过侦听的方式在资源池中选取传输资源,或者通过随机选取的方式在资源池中选取传输资源。Mode B: The terminal selects a resource in the resource pool for data transmission. Specifically, the terminal may select transmission resources from the resource pool by means of listening, or select transmission resources from the resource pool by means of random selection.
图3示出了一种通过侦听方式进行资源选取的示意图。在V2X中,当在时刻n有新的数据包到达,触发终端进行初始资源选择或触发资源重选的情况下,终端可以根据过去1秒中的侦听结果,在[n+T1,n+T2]毫秒时间范围内进行资源选取,其中T1≤4;20≤T2≤100。T1的选取应该大于终端的处理时延,T2的选取需要在业务的时延要求范围内。例如, 如果业务的时延要求是50ms,则20≤T2≤50,如果业务的时延要求是100ms,则20≤T2≤100。Figure 3 shows a schematic diagram of resource selection by means of listening. In V2X, when a new data packet arrives at time n and triggers the terminal to perform initial resource selection or triggers resource reselection, the terminal can, based on the listening results in the past 1 second, enter [n+T1,n+ T2] Resource selection within millisecond time range, where T1≤4; 20≤T2≤100. The selection of T1 should be greater than the processing delay of the terminal, and the selection of T2 needs to be within the required range of the service delay. For example, if the delay requirement of the service is 50ms, then 20≤T2≤50, and if the delay requirement of the service is 100ms, then 20≤T2≤100.
通常,V2X场景中的终端设备可以通过在PSCCH中携带资源预留信息来指示其预留的资源,这样其他终端设备可以通过侦听的方式来确定该终端设备所预留的资源,以及自己是否需要释放预留的资源。Generally, a terminal device in a V2X scenario can indicate its reserved resources by carrying resource reservation information in the PSCCH, so that other terminal devices can determine the resources reserved by the terminal device by means of listening, and whether it is Need to release reserved resources.
终端设备在资源选取时,可以根据其他终端设备预留的资源进行选择。When a terminal device selects resources, it can make a selection based on the resources reserved by other terminal devices.
在LTE-V2X中,终端在选择窗内进行资源选取的过程可以如下:In LTE-V2X, the process for the terminal to select resources in the selection window can be as follows:
1、如果终端在侦听窗内某些子帧上发送数据,没有进行侦听,则这些子帧在选择窗内对应的子帧上的资源被排除掉。1. If the terminal sends data on some subframes in the listening window without listening, the resources of these subframes on the corresponding subframes in the selection window are excluded.
如果终端在侦听窗内的时刻t发送了数据,导致终端没有对其他终端的数据传输情况进行侦听。因此,该终端可以在选择窗内将其他终端在时刻t有可能预留的资源全部排除掉。If the terminal sends data at time t within the listening window, the terminal does not listen to the data transmission status of other terminals. Therefore, the terminal can exclude all the resources that may be reserved by other terminals at time t in the selection window.
2、如果终端在侦听窗内检测到PSCCH,测量该PSCCH调度的PSSCH的参考信号接收功率(reference signal receiving power,RSRP)。如果测量的PSSCH-RSRP高于PSSCH-RSRP门限,并且根据该PSCCH中传输的控制信息中的预留信息确定其预留的传输资源在终端的资源选择窗内,则终端在资源集合A中排除掉该资源。其中,资源集合A的初始集合包括资源选择窗内的所有备选资源,PSSCH-RSRP门限的选取是由检测到的PSCCH中携带的优先级信息和终端待传输数据的优先级确定的。2. If the terminal detects the PSCCH in the listening window, it measures the reference signal receiving power (RSRP) of the PSSCH scheduled by the PSCCH. If the measured PSSCH-RSRP is higher than the PSSCH-RSRP threshold, and the reserved transmission resource is determined to be within the resource selection window of the terminal according to the reservation information in the control information transmitted in the PSCCH, the terminal is excluded from resource set A Drop the resource. The initial set of resource set A includes all candidate resources in the resource selection window, and the selection of the PSSCH-RSRP threshold is determined by the priority information carried in the detected PSCCH and the priority of the data to be transmitted by the terminal.
可选地,网络设备可以向终端设备配置优先级信息与PSSCH-RSRP门限的对应关系,例如,网络设备可以向终端设备配置PSCCH中携带的优先级信息-待传输数据的优先级,与门限之间的对应关系。终端接收到该对应关系后,可以根据该对应关系,确定使用的PSSCH-RSRP门限。Optionally, the network device can configure the terminal device with the correspondence between the priority information and the PSSCH-RSRP threshold. For example, the network device can configure the terminal device with the priority information carried in the PSCCH-the priority of the data to be transmitted, which is the same as the threshold. Correspondence between. After receiving the corresponding relationship, the terminal can determine the PSSCH-RSRP threshold used according to the corresponding relationship.
通常,在待传输数据的优先级确定的情况下,检测到的PSCCH中携带的优先级越高,对应的RSRP门限越低;检测到的PSCCH中携带的优先级越低,对应的RSRP门限越高。Generally, when the priority of the data to be transmitted is determined, the higher the priority carried in the detected PSCCH, the lower the corresponding RSRP threshold; the lower the priority carried in the detected PSCCH, the lower the corresponding RSRP threshold high.
3、如果集合A中剩余的资源个数小于选择窗内总资源个数的20%,终端可以将PSSCH-RSRP的门限提升3dB,并且重复步骤1-2,直到集合A中剩余的资源个数大于总资源数的20%。3. If the number of resources remaining in set A is less than 20% of the total number of resources in the selection window, the terminal can increase the PSSCH-RSRP threshold by 3dB, and repeat steps 1-2 until the number of resources remaining in set A More than 20% of the total resources.
4、终端对集合A中剩余的资源进行侧行接收信号场强指示(sidelink received signal strength indicator,S-RSSI)检测,并且按照能量高低进行排序,把能量最低的20%(相对于集合A中的资源个数)资源放入集合B。4. The terminal performs sidelink received signal strength indicator (S-RSSI) detection on the remaining resources in set A, and sorts them according to energy level, and sorts the 20% of the lowest energy (relative to set A) The number of resources) is placed in set B.
资源的S-RSSI越高,表示该资源的能量越高,终端在该资源上传输数据受到的干扰越大,则终端在选择资源时,可以尽量避免使用能量高的资源。因此,终端可以优先选择能量低的资源。The higher the S-RSSI of the resource, the higher the energy of the resource, and the greater the interference that the terminal will experience when transmitting data on the resource. The terminal can try to avoid using high-energy resources when selecting resources. Therefore, the terminal can preferentially select low-energy resources.
5、终端从集合B中等概率地选取一个资源进行数据传输。5. The terminal selects a resource from set B with a moderate probability for data transmission.
在NR-V2X中,需要支持自动驾驶,因此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。In NR-V2X, automatic driving needs to be supported, so higher requirements are put forward for data interaction between vehicles, such as higher throughput, lower delay, higher reliability, and larger coverage. More flexible resource allocation, etc.
NR-V2X的物理层结构如图4所示。The physical layer structure of NR-V2X is shown in Figure 4.
由图4可以看出,用于传输控制信息的PSCCH是包含在用于传输数据的PSSCH中的,这也意味着PSCCH与PSSCH必须同时发送。因此,目前标准中只支持当前传输块(transport block,TB)的初传预留当前TB的重传,当前TB的重传预留当前TB的重传,以及上一个TB的初传或重传预留当前TB的初传或重传。It can be seen from Figure 4 that the PSCCH used to transmit control information is included in the PSSCH used to transmit data, which also means that the PSCCH and PSSCH must be sent at the same time. Therefore, the current standard only supports the initial transmission of the current transport block (TB) to reserve the retransmission of the current TB, the retransmission of the current TB reserves the retransmission of the current TB, and the initial transmission or retransmission of the previous TB. Reserve the initial transmission or retransmission of the current TB.
如图5所示,TB1包括资源块x1、y1和z1,TB2包括资源块x2、y2和z2。TB1的初传资源x1可以预留TB2的初传资源x2,TB2的初传资源x2可以预留TB2的重传资源y2和z2,TB2的重传资源y2可以预留TB2的重传资源z2。As shown in FIG. 5, TB1 includes resource blocks x1, y1, and z1, and TB2 includes resource blocks x2, y2, and z2. The initial transmission resource x1 of TB1 can reserve the initial transmission resource x2 of TB2, the initial transmission resource x2 of TB2 can reserve the retransmission resources y2 and z2 of TB2, and the retransmission resource y2 of TB2 can reserve the retransmission resource z2 of TB2.
由于PSCCH和PSSCH是同时发送的,因此,终端设备在进行初始资源选择或资源重 选时,所选择的初传资源是无法向其他终端设备进行指示的,只有在进行初传之后,才可以通过初传PSCCH向其他终端设备指示其预留的资源。Since PSCCH and PSSCH are sent at the same time, when a terminal device performs initial resource selection or resource reselection, the selected initial transmission resource cannot be indicated to other terminal devices. Only after the initial transmission can it be passed The PSCCH is initially transmitted to indicate its reserved resources to other terminal devices.
以图6为例,终端在时刻n产生数据包,且终端设备需要进行资源选择,本申请实施例可以从资源选择窗内选择资源集合A。资源选择窗从时刻(n+T1)开始,到时刻(n+T2)结束。Taking FIG. 6 as an example, the terminal generates a data packet at time n, and the terminal device needs to select a resource. In this embodiment of the present application, the resource set A can be selected from the resource selection window. The resource selection window starts at time (n+T1) and ends at time (n+T2).
T1大于或等于终端处理数据时长以及进行资源选择所需的时长之和,T2
min≤T2≤业务的时延要求范围。T2
min的取值为{1,5,10,20}*2
μ个时隙,其中μ=0,1,2,3分别对应于子载波间隔是15,30,60,120kHz的情况。
T1 is greater than or equal to the sum of the data processing time of the terminal and the time required for resource selection, and T2 min ≤ T2 ≤ service delay requirement range. The value of T2 min is {1,5,10,20}*2 μ time slots, where μ=0,1,2,3 respectively correspond to the case where the subcarrier spacing is 15,30,60,120kHz.
举例说明,当子载波间隔为15kHz时,μ=0,T2
min为1*2
0个时隙;当子载波间隔为60kHz时,μ=2,T2
min为10*2
2个时隙。
Illustrate, when the sub-carrier spacing is 15kHz, μ = 0, T2 min to 1 * 20 slots; when the subcarrier spacing 60kHz, μ = 2, T2 min 10 * 22 slots.
终端可以在时刻(n-T0)到时刻n之间进行资源侦听,T0的取值范围是[100,1100]毫秒。如果终端侦听到PSCCH,则终端可以测量该PSCCH的RSRP或者该PSCCH调度的PSSCH的RSRP。如果测量的RSRP大于RSRP阈值,并且根据该PSCCH中传输的控制信息中的资源预留信息确定其预留的资源在资源选择窗内,则排除该PSCCH预留的资源,经过排除之后剩余的资源组成资源集合A。进行资源排除后,终端从资源集合A中随机选择若干资源,作为其初次传输以及重传的发送资源。上述RSRP阈值是由终端侦听到的PSCCH中携带的优先级和终端待发送数据的优先级决定的。The terminal can perform resource listening from time (n-T0) to time n, and the value range of T0 is [100,1100] milliseconds. If the terminal hears the PSCCH, the terminal can measure the RSRP of the PSCCH or the RSRP of the PSSCH scheduled by the PSCCH. If the measured RSRP is greater than the RSRP threshold, and the reserved resources are determined to be within the resource selection window according to the resource reservation information in the control information transmitted in the PSCCH, the resources reserved by the PSCCH are excluded, and the resources remaining after the exclusion Form resource set A. After resource exclusion, the terminal randomly selects several resources from the resource set A as sending resources for its initial transmission and retransmission. The above RSRP threshold is determined by the priority carried in the PSCCH monitored by the terminal and the priority of the data to be sent by the terminal.
可以理解的是,对于模式B,终端可以持续对资源进行侦听,并记录侦听的结果。当终端在时刻n产生数据包,并需要进行资源选择时,终端可以根据之前在时刻(n-T0)到时刻n之间的侦听结果,进行资源选择。It is understandable that for mode B, the terminal can continuously listen for resources and record the results of the interception. When the terminal generates a data packet at time n and needs to perform resource selection, the terminal can perform resource selection according to the previous listening results between time (n-T0) and time n.
需要注意的是,NR-V2X中支持资源抢占,例如,高优先级的UE可以抢占低优先级UE的资源,以保证高优先级UE的业务优先传输。因此,终端进行资源排除后,集合A中可能会包含低优先级终端所预留的资源块。例如,通过调整RSRP阈值,终端可能会排除低优先级终端所预留的资源。假设在图6中,UE1在时刻n产生数据并进行资源选择,UE1确定了时刻(n+T1)到时刻(n+T2)的资源选择窗以及时刻(n-T0)到时刻n的资源侦听窗。在资源侦听窗内,UE1侦听到UE2在时刻(n-a)发送的PSCCH和PSSCH,并确定其预留了时刻(n+b)的资源x。UE1在侦听到UE2发送的PSCCH后,得知UE2的PSCCH中携带的优先级比自身待发送数据的优先级低,从而提升了RSRP阈值,使得测量到的UE2的发送信号的RSRP低于RSRP阈值的概率增加。当测量到的RSRP低于RSRP阈值时,UE1不会排除UE2所预留的资源x,即资源集合A中仍包括资源x。如果UE1在资源排除过后的资源集合A中随机选到了UE2预留的资源x,则UE1抢占资源x。反之,如果UE1检测到UE2的PSCCH中携带的优先级比自身待发送数据的优先级高,则降低RSRP阈值,使得UE2预留的资源更容易被排除,从而避免与高优先级的UE使用同一资源块。It should be noted that resource preemption is supported in NR-V2X. For example, a high-priority UE can preempt resources of a low-priority UE to ensure priority transmission of services of a high-priority UE. Therefore, after the terminal performs resource exclusion, the set A may include resource blocks reserved by the low-priority terminal. For example, by adjusting the RSRP threshold, the terminal may exclude resources reserved by low-priority terminals. Assume that in Figure 6, UE1 generates data and performs resource selection at time n, UE1 determines the resource selection window from time (n+T1) to time (n+T2) and the resource detection from time (n-T0) to time n. Listening window. In the resource listening window, UE1 listens to the PSCCH and PSSCH sent by UE2 at time (n-a), and determines that it reserves the resource x at time (n+b). After UE1 listens to the PSCCH sent by UE2, it learns that the priority carried in the PSCCH of UE2 is lower than the priority of the data to be sent, thereby raising the RSRP threshold, so that the measured RSRP of the signal sent by UE2 is lower than RSRP The probability of the threshold increases. When the measured RSRP is lower than the RSRP threshold, the UE1 will not exclude the resource x reserved by the UE2, that is, the resource set A still includes the resource x. If UE1 randomly selects the resource x reserved by UE2 in the resource set A after the resource exclusion, UE1 preempts the resource x. Conversely, if UE1 detects that the priority carried in the PSCCH of UE2 is higher than the priority of its own data to be sent, the RSRP threshold is lowered, so that the resources reserved by UE2 are more easily excluded, thereby avoiding using the same with high-priority UEs. Resource block.
此外,NR-V2X还支持在初始资源选择或资源重选后继续进行再评估(re-evaluation)。In addition, NR-V2X also supports re-evaluation (re-evaluation) after initial resource selection or resource reselection.
如图7所示,终端在时刻n产生数据,确定资源侦听窗与资源选择窗之后,进行资源选择,并且选择了时刻(n+a)的初传资源x,以及时刻(n+b)的重传资源y和时刻(n+c)的重传资源z。在时刻n后,终端仍然会持续侦听PSCCH。在时刻(n+a)以前,如果终端通过持续侦听发现资源x或资源y或资源z被其他UE预留,并且测量的RSRP高于RSRP阈值,终端会释放对应资源,并在满足业务时延要求的前提下重选另一块资源。在时刻(n+a)后,因为终端已经在资源x上发送了PSCCH和PSSCH并预留了资源y和z,终端只有通过持续侦听发现有高优先级的UE预留了资源y和/或z,并且RSRP高于RSRP阈值,终端才会释放资源y和/或z,并重选资源。如果是低优先级的UE预留了资源y和/或z,终端不会释放资源y和/或z,因为按照资源抢占的机制,如果低优先级的UE通过侦听发现比其优先级高的终端预留了资源y和/或z,会主动释放资源y和/或z,这样能够避免发生资源冲突。As shown in Figure 7, the terminal generates data at time n, determines the resource listening window and the resource selection window, selects the resource, and selects the initial transmission resource x at time (n+a) and time (n+b) The retransmission resource y of and the retransmission resource z at time (n+c). After time n, the terminal will continue to listen to the PSCCH. Before time (n+a), if the terminal discovers that resource x, resource y, or resource z is reserved by other UEs through continuous listening, and the measured RSRP is higher than the RSRP threshold, the terminal will release the corresponding resources and meet the service requirements Re-select another resource on the premise of delay. After time (n+a), because the terminal has already sent PSCCH and PSSCH on resource x and reserved resources y and z, the terminal only discovers through continuous listening that a high-priority UE has reserved resources y and/ Or z, and RSRP is higher than the RSRP threshold, the terminal will release resources y and/or z, and reselect resources. If a low-priority UE reserves resources y and/or z, the terminal will not release resources y and/or z, because according to the resource preemption mechanism, if a low-priority UE discovers that its priority is higher than its priority through listening The terminal of which reserves resources y and/or z will actively release resources y and/or z, which can avoid resource conflicts.
但是,在上述NR-V2X资源选择机制中,终端选择的初传资源也可能抢占其他低优先级UE预留的资源,而终端在进行初传之前并不会发送任何信号告知被抢占的低优先级UE释放对应资源并重选资源,从而导致资源碰撞。However, in the above-mentioned NR-V2X resource selection mechanism, the initial transmission resources selected by the terminal may also preempt resources reserved by other low-priority UEs, and the terminal will not send any signal to inform the preempted low-priority UE before the initial transmission. The first-level UE releases the corresponding resources and reselects the resources, resulting in resource collision.
例如图8中,UE1在时刻n产生数据包后,可以确定资源选择窗与资源侦听窗并进行资源选择。在资源侦听窗内,UE1侦听到,UE2在时刻(n-a)发送了PSCCH和PSSCH并预留了时刻(n+b)的资源x。UE1在资源侦听窗内侦听到了UE2的PSCCH后,发现UE2的PSCCH中携带的优先级低于自身要发送数据的优先级,按照上文所述,通过调整RSRP阈值,UE1并没有排除UE2预留的资源x。假设UE1选择了资源x进行初次传输,并且选择了重传资源y。与此同时,UE2在时刻(n-a)发送了PSCCH和PSSCH之后一直在进行持续侦听,但是直到时刻(n+b),UE1都没有发送任何信号告知UE2释放资源x并重选(因为UE1在时刻(n+b)才会进行初传,才会发送PSCCH与PSSCH)。从而UE1与UE2可能同时使用了资源x,资源碰撞产生,UE1与UE2互为干扰源,通信可靠性降低。For example, in FIG. 8, after UE1 generates a data packet at time n, it can determine the resource selection window and the resource listening window and perform resource selection. In the resource listening window, UE1 listens, UE2 sends PSCCH and PSSCH at time (n-a) and reserves resource x at time (n+b). After UE1 listened to the PSCCH of UE2 in the resource listening window, it found that the priority carried in the PSCCH of UE2 was lower than the priority of the data to be sent by itself. According to the above, by adjusting the RSRP threshold, UE1 did not exclude UE2 Reserved resources x. Assume that UE1 selects resource x for the initial transmission, and selects the retransmission resource y. At the same time, UE2 has been continuously listening after sending PSCCH and PSSCH at time (na), but until time (n+b), UE1 has not sent any signal to tell UE2 to release resource x and reselect (because UE1 at time (n+b) will be the first transmission, will send PSCCH and PSSCH). Therefore, UE1 and UE2 may use resource x at the same time, resource collision occurs, UE1 and UE2 are interference sources for each other, and communication reliability is reduced.
另外,UE1在时刻n有业务到达,UE1进行资源选取,并选择了时刻(n+a)的初传资源x,以及时刻(n+b)和时刻(n+c)的重传资源y和z。但是,UE1在时刻(n+a)发送初传数据之后,并在时刻(n+b)之前通过re-evaluation发现有高优先级UE抢占了UE1在时刻n选取的资源y,按照资源抢占的原则,UE1需要释放资源y,重新选择重传资源。如果资源y的重选按照与图8类似的方法进行选择的话,由于其他UE未能得知终端重选的资源,则同样也会存在资源碰撞的问题,即UE1重新选择的资源可能会和低优先级的UE预留的资源发生冲突。In addition, UE1 has a service arrives at time n, UE1 selects resources, and selects the initial transmission resource x at time (n+a), and the retransmission resource y at time (n+b) and time (n+c) and z. However, after UE1 sends the initial transmission data at time (n+a), and through re-evaluation before time (n+b), it is found that a high-priority UE preempts the resource y selected by UE1 at time n, according to the resource preemption In principle, UE1 needs to release resource y and reselect resources for retransmission. If the reselection of resource y is selected according to a method similar to that in Fig. 8, since other UEs cannot know the resource reselected by the terminal, there will also be a resource collision problem, that is, the resource reselected by UE1 may be as low as possible. The resources reserved by the priority UE conflict.
基于此,本申请实施例提供一种资源选择的方法,能够避免发生资源冲突,有利于提高通信可靠性。Based on this, the embodiment of the present application provides a method for resource selection, which can avoid resource conflicts and help improve communication reliability.
当终端所使用的资源池被配置或预配置为支持资源抢占,终端可以进行资源抢占。When the resource pool used by the terminal is configured or pre-configured to support resource preemption, the terminal can perform resource preemption.
当终端所使用的资源池被配置或预配置为支持资源抢占,终端可以根据测量的信道占用率(channel busy ratio,CBR)的结果,决定是否要进行资源抢占。例如,在CBR较高时,终端进行资源抢占;而在CBR较低时,不进行资源抢占。When the resource pool used by the terminal is configured or pre-configured to support resource preemption, the terminal can decide whether to perform resource preemption according to the result of the measured channel busy ratio (CBR). For example, when the CBR is high, the terminal performs resource preemption; when the CBR is low, the terminal does not perform resource preemption.
CBR表示其他终端对信道的占用率,CBR较高说明信道的占用率较高,需要终端进行资源抢占才能使用资源;CBR较低说明信道的占用率较低,信道比较空闲,终端可以不需要进行资源抢占就可以使用资源。CBR indicates the occupancy rate of the channel by other terminals. A higher CBR indicates a higher channel occupancy rate and requires the terminal to preempt resources to use resources; a lower CBR indicates a lower channel occupancy rate and the channel is relatively idle, and the terminal may not need to perform Resources can be used by preempting resources.
终端确定需要进行资源抢占可以表示终端激活了资源抢占。The terminal determining that resource preemption is required may indicate that the terminal has activated resource preemption.
在终端激活资源抢占的情况下,当时刻n有数据到达,终端可以根据在资源侦听窗内侦听的结果排除资源选择窗内的对应资源,剩余未被排除的资源组成资源集合A。此时,在资源集合A中,既包括未被其他UE预留的空白资源,也包括被其他UE预留但RSRP测量值低于RSRP阈值的资源,将未被其他UE预留的空白资源记为资源集合B。In the case that the terminal activates resource preemption, when data arrives at time n, the terminal can exclude the corresponding resources in the resource selection window according to the result of listening in the resource listening window, and the remaining unexcluded resources form the resource set A. At this time, in resource set A, there are not only blank resources not reserved by other UEs, but also resources reserved by other UEs but whose RSRP measurement value is lower than the RSRP threshold. The blank resources not reserved by other UEs are recorded. It is resource collection B.
终端初次传输所用的资源从资源集合B中等概率随机选取,终端重传所用的资源从资源集合A中等概率随机选取。极端情况下,资源集合B为空集或者资源集合B只包括资源集合A中时域顺序最高(时域位置最后)的资源时,终端初传所用的资源从资源集合A中等概率随机选取。The resources used by the terminal for initial transmission are randomly selected from resource set B with medium probability, and the resources used for terminal retransmission are randomly selected from resource set A with medium probability. In extreme cases, when resource set B is an empty set or resource set B only includes resources in resource set A with the highest time domain order (the last time domain position), the resources used by the terminal for initial transmission are randomly selected from resource set A with medium probability.
如图9所示,本申请实施例的方法可以包括步骤S910~S920。As shown in FIG. 9, the method of the embodiment of the present application may include steps S910 to S920.
S910、在第一终端设备进行初始资源选择、或第一终端设备有数据到达并在一定条件下触发资源重选、或第一终端设备确定其预留的资源被其他终端设备成功抢占的情况下,第一终端设备从第一资源集合中选择第一资源,其中,第一资源集合不包括资源选择窗内被其他终端设备预留的资源。S910. When the first terminal device performs initial resource selection, or the first terminal device has data arriving and triggers resource reselection under certain conditions, or the first terminal device determines that its reserved resources are successfully preempted by other terminal devices , The first terminal device selects the first resource from the first resource set, where the first resource set does not include resources reserved by other terminal devices in the resource selection window.
S920、第一终端设备在第一资源上进行数据传输。S920. The first terminal device performs data transmission on the first resource.
触发终端设备进行初始资源选择可以指终端设备在初始接入网络,并有数据到达时可以触发终端设备进行初始资源选择。Triggering the terminal device to perform initial resource selection may refer to that the terminal device is initially connected to the network and when data arrives, the terminal device can be triggered to perform the initial resource selection.
触发终端设备进行资源重选的条件有很多,本申请实施例对此不做具体限定。例如,网络设备可以为终端设备配置一定数量的资源,如m个资源,终端设备每使用一个资源,资源的数量减1,当资源的数量减为0时,且终端设备有数据需要传输时,就会触发终端设备进行资源重选。There are many conditions for triggering the terminal device to perform resource reselection, which are not specifically limited in the embodiment of the present application. For example, the network device can configure a certain number of resources for the terminal device, such as m resources. Each time the terminal device uses a resource, the number of resources is reduced by 1. When the number of resources is reduced to 0 and the terminal device has data to transmit, It will trigger the terminal device to reselect resources.
第一终端设备确定其预留的资源被其他终端设备成功抢占是指,第一终端设备已经通过初传或重传发送了资源预留信息,指示其预留的资源,如指示其预留的资源为资源a。但是第一终端设备通过侦听发现其他高优先级的UE2也预留了资源a,并且检测到UE2发送的PSCCH或PSSCH的信号质量高于预设阈值,则表示第一终端设备预留的资源被其他终端设备成功抢占。这也就意味着UE2对资源a抢占成功,在该情况下,第一终端设备需要放弃资源a,重新对资源a选择重选资源。The first terminal device determines that its reserved resources are successfully preempted by other terminal devices means that the first terminal device has sent resource reservation information through initial transmission or retransmission, indicating its reserved resources, such as instructing it to reserve The resource is resource a. However, the first terminal device discovers through listening that other high-priority UE2 also reserves resource a, and detects that the signal quality of the PSCCH or PSSCH sent by UE2 is higher than the preset threshold, it indicates the resources reserved by the first terminal device Successfully preempted by other terminal equipment. This means that the UE2 succeeds in preempting the resource a. In this case, the first terminal device needs to abandon the resource a and reselect the resource a again.
上述三种情况都存在第一终端设备传输数据所使用的资源不能被其他终端设备获取的问题,所以低优先级的终端设备不能根据侦听结果放弃对某些资源的使用,造成资源冲突。In the above three cases, there is a problem that the resources used by the first terminal device to transmit data cannot be acquired by other terminal devices. Therefore, the low-priority terminal device cannot abandon the use of certain resources according to the interception result, causing resource conflicts.
对于未能被其他终端设备获取的资源,本申请实施例可以从第一资源集合中进行选择,即从第一资源集合中选择第一资源,该第一资源集合不包括被其他终端设备预留的资源,该第一资源集合可以为上述仅包括空白资源的资源集合B。For resources that cannot be acquired by other terminal devices, this embodiment of the application can select from the first resource set, that is, select the first resource from the first resource set, and the first resource set does not include reservations by other terminal devices. The first resource set may be the above-mentioned resource set B that only includes blank resources.
第一终端设备在选择第一资源时,可以根据在资源侦听窗内的侦听结果,将资源选择窗内所有被其他终端设备预留的资源都排除掉,仅从资源选择窗内未被其他终端设备预留的空白资源中进行选择,这样能够避免与低优先级UE预留的资源发生冲突,有利于提高通信可靠性。When the first terminal device selects the first resource, it can exclude all the resources reserved by other terminal devices in the resource selection window according to the listening result in the resource listening window, and only remove the resources that are not in the resource selection window. Select from the blank resources reserved by other terminal devices, which can avoid conflicts with resources reserved by low-priority UEs, which is beneficial to improving communication reliability.
资源侦听窗对应的时间范围可以为[n-T0,n],时刻n为第一终端设备需要进行初始资源选择的时刻、或时刻n为第一终端设备有数据到达并在一定条件下触发资源重选的时刻、或时刻n为第一终端设备确定其预留的资源被其他终端设备成功抢占的时刻。The time range corresponding to the resource listening window can be [n-T0,n], time n is the time when the first terminal device needs to perform initial resource selection, or time n is the first terminal device has data arrived and triggered under certain conditions The time of resource reselection, or time n, is the time when the first terminal device determines that its reserved resources are successfully preempted by other terminal devices.
T0可以是协议中预定义的,T0的取值范围可以是[100,1100]毫秒。T0 can be predefined in the protocol, and the value range of T0 can be [100,1100] milliseconds.
资源选择窗对应的时间范围可以为[n+T1,n+T2],T1大于0,T2大于T1,时刻n为所述第一终端设备需要进行初始资源选择的时刻、或时刻n为所述第一终端设备有数据到达并在一定条件下触发资源重选的时刻、或时刻n为第一终端设备确定其预留的资源被其他终端设备成功抢占的时刻。The time range corresponding to the resource selection window can be [n+T1, n+T2], T1 is greater than 0, T2 is greater than T1, and time n is the time when the first terminal device needs to perform initial resource selection, or time n is the The time when data arrives at the first terminal device and triggers resource reselection under certain conditions, or time n is the time when the first terminal device determines that its reserved resources are successfully preempted by other terminal devices.
其中,T2是根据第一终端设备中待传输数据的最大传输时延确定的,即T2的选择需要满足数据传输的时延要求。Among them, T2 is determined according to the maximum transmission delay of the data to be transmitted in the first terminal device, that is, the selection of T2 needs to meet the delay requirement of data transmission.
举例说明,假设第一终端设备中待传输数据的传输时延为50ms,如果第一终端设备在时刻n有数据到达,并触发了初始资源选择或资源重选,则T2≤50ms;如果数据到达的时刻为时刻(n-m),且终端设备已经进行了数据的初传,初传之后第一终端设备在时刻n确定其预留的资源被其他终端设备成功抢占,则(T2+m)≤50ms。For example, suppose the transmission delay of the data to be transmitted in the first terminal device is 50ms. If the first terminal device has data arriving at time n and triggers initial resource selection or resource reselection, then T2≤50ms; if the data arrives The time at is time (nm), and the terminal device has performed the initial data transmission. After the initial transmission, the first terminal device determines that its reserved resources are successfully preempted by other terminal devices at time n, then (T2+m)≤50ms .
第一资源可以是初传资源。例如,在第一终端设备进行初始资源选择、或第一终端设备有数据到达并在一定条件下触发资源重选的情况下,终端设备可以从第一资源集合中选择初传资源。The first resource can be the initial resource. For example, in the case where the first terminal device performs initial resource selection, or the first terminal device has data arriving and triggers resource reselection under certain conditions, the terminal device may select the initial transmission resource from the first resource set.
第一终端设备从第一资源集合中选择初传资源后,可以从第二资源集合中选择重传资源。终端设备在选择重传资源后,可以在重传资源上发送重传数据。After selecting the initial transmission resource from the first resource set, the first terminal device may select the retransmission resource from the second resource set. After selecting the retransmission resource, the terminal device can send the retransmission data on the retransmission resource.
第二资源集合可以包括资源选择窗内未被其他终端设备预留的资源、以及满足第一条件的资源,第二资源集合的范围大于或等于第一资源集合的范围。例如该第二资源集合可以为上文描述的集合A。The second resource set may include resources that are not reserved by other terminal devices in the resource selection window and resources that meet the first condition, and the range of the second resource set is greater than or equal to the range of the first resource set. For example, the second resource set may be the set A described above.
满足第一条件的资源例如可以是其他终端设备通过第一PSCCH预留的资源,第一PSCCH为信号质量小于第一预设阈值、或调度的PSSCH的信号质量小于第二预设阈值的PSCCH。The resource that satisfies the first condition may be, for example, a resource reserved by other terminal equipment through the first PSCCH. The first PSCCH is a PSCCH whose signal quality is less than a first preset threshold or the signal quality of a scheduled PSSCH is less than a second preset threshold.
其中,第一预设阈值和/或第二预设阈值可以是网络设备配置给第一终端设备的。第一预设阈值与第二预设阈值可以相等,也可以不相等。Wherein, the first preset threshold and/or the second preset threshold may be configured by the network device to the first terminal device. The first preset threshold and the second preset threshold may be equal or not equal.
例如,网络设备可以向终端设备配置其他终端设备传输的数据的优先级-第一终端设备待传输数据的优先级,与预设阈值之间的关系,终端设备可以自行根据优先级信息,确定第一预设阈值和/或第二预设阈值。由于不同的终端设备传输的数据的优先级不同,因此,针对不同的终端设备,该第一预设阈值可以不同,第二预设阈值也可以不同。For example, the network device can configure the terminal device with the priority of the data transmitted by other terminal devices-the priority of the data to be transmitted by the first terminal device, and the relationship between the preset threshold. The terminal device can determine the first terminal device based on the priority information. A preset threshold and/or a second preset threshold. Since the priority of data transmitted by different terminal devices is different, for different terminal devices, the first preset threshold value may be different, and the second preset threshold value may also be different.
终端设备在选择重传资源时,可以根据在资源侦听窗内的侦听结果,将资源选择窗内被其他终端设备预留的且信号质量比较高的资源排除掉,没有被排除的资源组成第二资源集合,终端设备从第二资源集合中选择重传资源。When the terminal device selects retransmission resources, it can exclude the resources reserved by other terminal devices and have relatively high signal quality in the resource selection window according to the listening results in the resource listening window, and there is no excluded resource composition The second resource set, the terminal device selects the retransmission resource from the second resource set.
也就是说,第二资源集合中包括了未被其他终端设备预留的资源、以及被其他终端设备预留的但信号质量比较差的资源。That is, the second resource set includes resources that are not reserved by other terminal devices and resources that are reserved by other terminal devices but have poor signal quality.
由于重传资源是终端设备在初传之后进行数据传输所使用的资源,因此第一终端设备在使用重传资源时,已经通过初传向其他设备指示了其预留的重传资源,其他终端设备可以通过对第一终端设备的初传资源进行侦听,放弃或抢占重传资源。例如,信号质量较差的终端设备可以放弃对重传资源的使用,而信号质量较高的终端设备所预留的资源已经被第一终端设备排除在第二资源集合之外,这样第一终端设备选择的重传资源也不会和其他终端设备预留的资源发生冲突,有利于提高通信性能。Since the retransmission resource is the resource used by the terminal device for data transmission after the initial transmission, when the first terminal device uses the retransmission resource, it has already indicated its reserved retransmission resources to other devices through the initial transmission, and other terminals The device can listen to the initial transmission resource of the first terminal device to give up or preempt the retransmission resource. For example, a terminal device with poor signal quality can abandon the use of retransmission resources, and the resource reserved by a terminal device with higher signal quality has been excluded from the second resource set by the first terminal device, so that the first terminal The retransmission resources selected by the device will not conflict with the resources reserved by other terminal devices, which is conducive to improving communication performance.
信号质量例如可以是通过以下中的至少一种进行表示的:RSRP、参考信号接收质量(reference signal receiving quality,RSRQ)、接收信号强度指示(received signal strength indication,RSSI)、信号与干扰加噪声比(signal-to-interference-and-noise-ratio,SINR)。For example, the signal quality may be expressed by at least one of the following: RSRP, reference signal receiving quality (RSRQ), received signal strength indication (RSSI), signal to interference plus noise ratio (signal-to-interference-and-noise-ratio, SINR).
下面结合图10进行说明。Description will be given below in conjunction with FIG. 10.
UE1激活资源抢占,并在时刻n有数据到达时,UE1可以根据时刻(n-T0)到时刻n的侦听窗内的侦听结果,对时刻(n+T1)到时刻(n+T2)的资源选择窗内的资源进行筛选,经过筛选后的资源组成资源集合A。如图10所示,资源集合A包括资源{x,y,z,m,n,k}。UE1 activates resource preemption, and when data arrives at time n, UE1 can determine from time (n+T1) to time (n+T2) according to the listening results in the listening window from time (n-T0) to time n The resources in the resource selection window are screened, and the screened resources form resource set A. As shown in Figure 10, the resource set A includes resources {x, y, z, m, n, k}.
在资源集合A中,资源z,m,n,k是未被其他UE预留的空白资源,资源x和y是被UE2和UE3预留的但RSRP测量值低于RSRP阈值的资源。空白资源z,m,n,k可以组成资源集合B。UE1初传所使用的资源可以从资源集合B中等概率随机选择。UE1重传所使用的资源可以从资源集合A中等概率随机选择。其中,重传资源的时域位置要在初传资源的时域位置之后。In resource set A, resources z, m, n, and k are blank resources not reserved by other UEs, and resources x and y are resources reserved by UE2 and UE3 but whose RSRP measurement value is lower than the RSRP threshold. Blank resources z, m, n, and k can form resource set B. The resources used by the UE1 for the initial transmission can be randomly selected from the resource set B with a medium probability. The resources used by the UE1 for retransmission can be randomly selected from the resource set A with a medium probability. Among them, the time domain position of the retransmission resource must be after the time domain position of the initial transmission resource.
UE1在从资源集合A和资源集合B中选择资源时,是等概率随机选择的,这样能够避免多个UE选择相同的资源,有利于减小资源发生冲突的概率。When UE1 selects resources from resource set A and resource set B, it is randomly selected with equal probability. This can prevent multiple UEs from selecting the same resource, which is beneficial to reduce the probability of resource conflicts.
此外,还存在一些极端情况,如第一资源集合为空,或者第一资源集合满足第二条件的情况下,第一终端设备可以从第二资源集合中选择第一资源。In addition, there are some extreme situations, such as when the first resource set is empty or the first resource set satisfies the second condition, the first terminal device may select the first resource from the second resource set.
第一资源集合为空表示资源选择窗内的所有资源都为其他终端设备预留的资源。If the first resource set is empty, it means that all resources in the resource selection window are resources reserved for other terminal devices.
第二条件为所述第一资源集合中的所有资源均是第二资源集合中时域位置高于第三预设阈值的资源,也就是说,第一资源集合仅包括第二资源集合中时域位置比较靠后的资源。The second condition is that all the resources in the first resource set are resources whose time domain positions in the second resource set are higher than the third preset threshold, that is, the first resource set only includes the resources in the second resource set. Resources with a lower domain location.
例如,第一资源集合包括资源m和n,资源m和n为第二资源集合中时域位置最高的资源,或者资源m和n分别为第二资源集合中时域位置最高和次高的资源。For example, the first resource set includes resources m and n, and resources m and n are the resources with the highest temporal position in the second resource set, or resources m and n are the resources with the highest and second-highest temporal position in the second resource set, respectively .
第一终端设备预留的且被其他终端设备成功抢占的资源为重传资源,在该情况下,终端设备可以从第一资源集合中选择针对该重传资源的重选资源。该第一资源集合不包括被其他终端设备预留的资源。The resource reserved by the first terminal device and successfully preempted by other terminal devices is the retransmission resource. In this case, the terminal device may select a reselection resource for the retransmission resource from the first resource set. The first resource set does not include resources reserved by other terminal devices.
具体地,第一终端设备确定其预留的且被其他终端设备成功抢占的资源包括至少一个资源,目标资源为该至少一个资源中时域位置最靠前的资源。终端设备在资源选择时,可以从第一资源集合中选择针对目标资源的重选资源。Specifically, the first terminal device determines that the resource reserved by the first terminal device and successfully preempted by other terminal devices includes at least one resource, and the target resource is the resource with the highest position in the time domain among the at least one resource. During resource selection, the terminal device may select a reselection resource for the target resource from the first resource set.
在终端设备预留的重传资源中,可能仅有部分重传资源被其他终端设备成功抢占,还有另外一部分重传资源未被其他终端设备成功抢占,为描述方便,可以将未被其他终端设备成功抢占的资源称为不进行资源重选的资源。为了避免终端设备重新选择的重传资源与不进行资源重选的资源的时域位置相距太近,终端设备可以排除与不进行资源重选的资源的时域位置之间的距离小于预设值的资源。Among the retransmission resources reserved by the terminal device, only part of the retransmission resources may be successfully preempted by other terminal devices, and there is another part of the retransmission resources that have not been successfully preempted by other terminal devices. The resource that the device successfully preempts is called the resource that does not perform resource reselection. In order to avoid that the retransmission resource reselected by the terminal device is too close to the time domain location of the resource that does not perform resource reselection, the terminal device can exclude that the distance from the time domain location of the resource that does not perform resource reselection is less than the preset value Resources.
例如,终端设备不希望在一个时隙内针对一个数据进行两次重传,因此,为了避免重选资源与不进行资源重选的资源落入一个时隙,终端设备可以将与不进行资源重选的资源所在时隙内的所有资源都排除在第一资源集合之外,即第一资源集合不包括第一终端设备预留的不进行资源重选的资源所处时隙中的全部资源。For example, the terminal device does not want to retransmit one piece of data twice in one time slot. Therefore, in order to avoid reselecting resources and resources that are not subject to resource reselection falling into one time slot, the terminal device can compare and not retransmit resources. All resources in the time slot where the selected resource is located are excluded from the first resource set, that is, the first resource set does not include all resources in the time slot where the resource reserved by the first terminal device is not subject to resource reselection.
对于该至少一个资源中的除目标资源之外的其他资源的重选资源,第一终端设备可以从第三资源集合中进行选择。For reselecting resources of the at least one resource other than the target resource, the first terminal device may select from the third resource set.
具体地,第一终端设备可以从第三资源集合中选择第二资源,该第二资源是针对至少一个资源中除目标资源之外的资源的重选资源,第三资源集合包括资源选择窗内未被其他终端设备预留的资源、以及满足第一条件的资源。Specifically, the first terminal device may select a second resource from a third resource set. The second resource is a reselection resource for at least one resource other than the target resource. The third resource set includes the resource selection window. Resources that are not reserved by other terminal devices and resources that meet the first condition.
满足第一条件的资源例如可以是其他终端设备通过第一PSCCH预留的资源,第一PSCCH为信号质量小于第一预设阈值、或调度的PSSCH的信号质量小于第二预设阈值的PSCCH。The resource that satisfies the first condition may be, for example, a resource reserved by other terminal equipment through the first PSCCH. The first PSCCH is a PSCCH whose signal quality is less than a first preset threshold or the signal quality of a scheduled PSSCH is less than a second preset threshold.
其中,第一预设阈值和/或第二预设阈值可以是网络设备配置给第一终端设备的。第一预设阈值与第二预设阈值可以相等,也可以不相等。Wherein, the first preset threshold and/or the second preset threshold may be configured by the network device to the first terminal device. The first preset threshold and the second preset threshold may be equal or not equal.
例如,网络设备可以向终端设备配置其他终端设备传输的数据的优先级-第一终端设备待传输数据的优先级,与预设阈值之间的关系,终端设备可以自行根据优先级信息,确定第一预设阈值和/或第二预设阈值。由于不同的终端设备传输的数据的优先级不同,因此,针对不同的终端设备,该第一预设阈值可以不同,第二预设阈值也可以不同。For example, the network device can configure the terminal device with the priority of the data transmitted by other terminal devices-the priority of the data to be transmitted by the first terminal device, and the relationship between the preset threshold. The terminal device can determine the first terminal device based on the priority information. A preset threshold and/or a second preset threshold. Since the priority of data transmitted by different terminal devices is different, for different terminal devices, the first preset threshold value may be different, and the second preset threshold value may also be different.
与第一资源集合类似,第三资源集合也可以不包括与不进行资源重选的资源的时域位置之间的距离小于预设值的资源。例如,第三资源集合不包括第一终端设备预留的不进行资源重选的资源所处时隙中的全部资源。Similar to the first resource set, the third resource set may not include resources whose distances from the time domain positions of the resources for which resource reselection is not performed are less than a preset value. For example, the third resource set does not include all resources in the time slot where the resources reserved by the first terminal device without resource reselection are located.
本申请实施例的方案可以是针对PSCCH和PSSCH同时传输的场景,例如,终端设备在选择的第一资源、第二资源和/或重选资源上同时发送PSCCH和PSSCH,其中,该PSCCH可以携带第一终端设备的资源预留信息,即携带第一终端设备预留的资源位置。The solution of the embodiment of the present application may be for a scenario where PSCCH and PSSCH are simultaneously transmitted. For example, a terminal device simultaneously transmits PSCCH and PSSCH on the selected first resource, second resource, and/or reselection resource, where the PSCCH may carry The resource reservation information of the first terminal device carries the resource location reserved by the first terminal device.
第一终端设备预留的资源位置可以包括时域位置和/或频域位置。The resource location reserved by the first terminal device may include a time domain location and/or a frequency domain location.
下面结合图11进行说明。Description will be given below in conjunction with FIG.
UE1激活了资源抢占,并在时刻n有业务到达时,UE1完成了资源选取。在时刻(n+a),UE1通过再评估发现有高优先级的UE抢占了UE1在时刻n选取的资源,则UE1需要重选被抢占的资源。UE1 activates resource preemption, and when a service arrives at time n, UE1 completes resource selection. At time (n+a), UE1 finds through re-evaluation that a high-priority UE preempts the resource selected by UE1 at time n, and UE1 needs to reselect the preempted resource.
在图11中,在时刻n,UE1选取了资源x、y和z。在时刻(n+a),假设UE1通过持续侦听发现资源y被高优先级UE抢占,并且RSRP测量值高于RSRP阈值,则UE1针对资源y进行重选。UE1在时刻(n+a)进行资源重选的方式与图10中在时刻n进行资源选取的方式类似。例如,UE1可以根据在时刻(n+a-T0)到时刻(n+a)的资源侦听窗内的侦听结果,对时刻(n+a+T1)到时刻(n+a+T2)的资源选择窗内的资源进行筛选。In Fig. 11, at time n, UE1 selects resources x, y, and z. At time (n+a), if UE1 finds that resource y is preempted by a high-priority UE through continuous listening, and the RSRP measurement value is higher than the RSRP threshold, UE1 reselects resource y. The manner in which UE1 performs resource reselection at time (n+a) is similar to the manner in which resource selection is performed at time n in FIG. 10. For example, UE1 can, according to the listening results in the resource listening window from time (n+a-T0) to time (n+a), determine from time (n+a+T1) to time (n+a+T2) To filter the resources in the resource selection window.
T2的选取应该满足当前业务的传输时延要求。由于当前业务是在时刻n到达的,因此,(a+T2)≤业务的传输时延。The selection of T2 should meet the transmission delay requirements of the current service. Since the current service arrives at time n, (a+T2) ≤ service transmission delay.
UE在进行资源筛选时,还需要将不进行资源重选的资源所处时隙中的全部资源排除掉。假设UE1只针对资源y进行重选,则资源z所处时隙中的全部资源应被UE1排除,否则UE1可能在同一个时隙的两个资源上同时发送数据。在UE1进行上述资源排除后,剩余的资源组成的集合记为资源集合A。When the UE performs resource screening, it also needs to exclude all resources in the time slot where the resource that does not perform resource reselection is located. Assuming that UE1 only reselects resource y, all resources in the time slot where resource z is located should be excluded by UE1, otherwise UE1 may send data on two resources in the same time slot at the same time. After UE1 performs the foregoing resource exclusion, the set of remaining resources is denoted as resource set A.
按照图11中描述的方法,资源集合A中未被其他UE预留的空白资源组成资源集合B。UE1将对所有需要进行资源重选的资源进行时域上的排序,针对时域顺序最低(时域位置排在最前面)的资源的重选将在资源集合B中等概率随机选择,针对其余资源的重选在资源集合A中等概率随机选择。假设UE1只针对资源y进行重选,则UE1直接在资源集合B中为资源y寻找重选资源。假设UE针对资源y和z进行资源重选,则UE1在资源集合B中为资源y寻找重选资源,在资源集合A中为资源z寻找重选资源。其中,资源z的重选资源的时域位置应该排在资源y的重选资源的时域位置之后。According to the method described in FIG. 11, the blank resources in the resource set A that are not reserved by other UEs form the resource set B. UE1 will sort all the resources that require resource reselection in the time domain. The reselection of the resource with the lowest time domain order (the time domain position is at the top) will be randomly selected in resource set B with a medium probability, and for the remaining resources The reselection is randomly selected in resource set A with medium probability. Assuming that UE1 only performs reselection for resource y, UE1 directly searches resource set B for reselection resources for resource y. Assuming that the UE performs resource reselection for resources y and z, UE1 searches for reselection resources for resource y in resource set B, and searches for reselection resources for resource z in resource set A. Among them, the time domain position of the reselection resource of resource z should be arranged after the time domain position of the reselection resource of resource y.
此外,还存在一些极端情况,如第一资源集合为空,或者第一资源集合满足第二条件的情况下,第一终端设备可以从第三资源集合中选择第一资源。In addition, there are some extreme cases, such as when the first resource set is empty or the first resource set satisfies the second condition, the first terminal device may select the first resource from the third resource set.
第一资源集合为空表示资源选择窗内的所有资源都为其他终端设备预留的资源。If the first resource set is empty, it means that all resources in the resource selection window are resources reserved for other terminal devices.
第二条件为所述第一资源集合中的所有资源均是第三资源集合中时域位置高于第三预设阈值的资源,也就是说,第一资源集合仅包括第三资源集合中时域位置比较靠后的资源。The second condition is that all resources in the first resource set are resources whose time-domain positions in the third resource set are higher than the third preset threshold, that is, the first resource set only includes the resources in the third resource set. Resources with a lower domain location.
例如,第一资源集合包括资源m和n,资源m和n为第三资源集合中时域位置最高的资源,或者资源m和n分别为第三资源集合中时域位置最高和次高的资源。For example, the first resource set includes resources m and n, and resources m and n are the resources with the highest temporal position in the third resource set, or resources m and n are the resources with the highest and second highest temporal position in the third resource set, respectively .
可以理解的是,上文描述的的低优先级UE可以指UE所发发送的PSCCH中携带的优先级较低。It is understandable that the low-priority UE described above may refer to the lower priority carried in the PSCCH sent by the UE.
本申请实施例中,初传资源和重传资源可以是同一时刻选择的,例如,终端设备在初传之前,对初传资源和所有的重传资源进行选择。In the embodiment of the present application, the initial transmission resource and the retransmission resource may be selected at the same time. For example, the terminal device selects the initial transmission resource and all retransmission resources before the initial transmission.
通过本申请实施例所描述的方法,UE1的初传会优先选择未被其他UE所预留的空白资源。在激活资源抢占的情况下,如果UE1的初传优先选择空白资源,即不会抢占低优先级UE所预留的资源,则只有重传会抢占低优先级UE所预留的资源。在图8中,如果是UE1的重传抢占了UE2所预留的资源x,在时刻n到时刻(n+b)期间,UE1会发送初传的PSCCH和PSSCH。而UE2会在时刻(n-a)到时刻(n+b)时刻持续侦听,当侦听到UE1发送的PSCCH时,UE2会释放资源x并重选,从而避免资源碰撞。此外,无论是否激活资源抢占,本申请实施例所描述的方法都可以提升UE1初传的通信可靠性。Through the method described in the embodiment of the present application, the initial transmission of UE1 will preferentially select blank resources not reserved by other UEs. In the case of active resource preemption, if the initial transmission of UE1 preferentially selects blank resources, that is, the resources reserved by the low-priority UE will not be preempted, only retransmission will preempt the resources reserved by the low-priority UE. In Figure 8, if UE1's retransmission preempts the resource x reserved by UE2, from time n to time (n+b), UE1 will send the PSCCH and PSSCH of the initial transmission. And UE2 will continue to listen from time (n-a) to time (n+b). When it listens to the PSCCH sent by UE1, UE2 will release resource x and reselect, so as to avoid resource collision. In addition, no matter whether resource preemption is activated or not, the method described in the embodiment of the present application can improve the communication reliability of UE1's initial transmission.
本申请实施例所描述的资源抢占指的是高优先级的UE可以抢占低优先级UE预留的资源。The resource preemption described in the embodiments of the present application refers to that a high-priority UE can preempt resources reserved by a low-priority UE.
上文中详细描述了根据本申请实施例的无线通信的方法,下面将结合图12至图15,描述根据本申请实施例的装置,方法实施例所描述的技术特征适用于以下装置实施例。The wireless communication method according to the embodiment of the present application is described in detail above. The device according to the embodiment of the present application will be described below in conjunction with FIG. 12 to FIG. 15. The technical features described in the method embodiment are applicable to the following device embodiments.
图12是本申请实施例提供的一种终端设备的示意性框图,该终端设备可以是上文描述的任一种终端设备,例如,该终端设备可以是上文描述的第一终端设备。图12所示的终端设备1200包括处理单元1210和通信单元1220,其中:FIG. 12 is a schematic block diagram of a terminal device provided by an embodiment of the present application. The terminal device may be any terminal device described above. For example, the terminal device may be the first terminal device described above. The terminal device 1200 shown in FIG. 12 includes a processing unit 1210 and a communication unit 1220, where:
处理单元1210,用于在第一终端设备进行初始资源选择、或所述第一终端设备有数据到达并在一定条件下触发资源重选、或所述第一终端设备确定其预留的资源被其他终端设备成功抢占的情况下,从第一资源集合中选择第一资源,所述第一资源集合不包括资源选择窗内被其他终端设备预留的资源。The processing unit 1210 is configured to perform initial resource selection on the first terminal device, or the first terminal device has data arriving and trigger resource reselection under certain conditions, or the first terminal device determines that its reserved resources are In the case that other terminal devices successfully preempt, the first resource is selected from the first resource set, and the first resource set does not include the resources reserved by other terminal devices in the resource selection window.
通信单元1220,用于在所述第一资源上进行数据传输。The communication unit 1220 is configured to perform data transmission on the first resource.
可选地,所述处理单元1210用于:在所述第一终端设备进行初始资源选择、或所述第一终端设备有数据到达并在一定条件下触发资源重选的情况下,从所述第一资源集合中选择初传资源。Optionally, the processing unit 1210 is configured to: when the first terminal device performs initial resource selection, or the first terminal device has data arriving and triggers resource reselection under certain conditions, from the Select the initial resource from the first resource collection.
可选地,所述处理单元1210用于:从第二资源集合中选择重传资源,所述第二资源集合包括所述资源选择窗内未被其他终端设备预留的资源、以及满足第一条件的资源;所述通信单元1220用于:在所述重传资源上发送重传数据。Optionally, the processing unit 1210 is configured to: select retransmission resources from a second resource set, where the second resource set includes resources that are not reserved by other terminal devices in the resource selection window and satisfy the first Conditional resources; the communication unit 1220 is used to send retransmission data on the retransmission resources.
可选地,所述第一终端设备预留的且被其他终端设备成功抢占的资源为重传资源。Optionally, the resources reserved by the first terminal device and successfully preempted by other terminal devices are retransmission resources.
可选地,所述第一终端设备确定其预留的且被其他终端设备成功抢占的资源包括至少一个资源,目标资源为所述至少一个资源中时域位置最靠前的资源;所述处理单元1210用于:从所述第一资源集合中选择针对所述目标资源的重选资源。Optionally, the first terminal device determines that the resource reserved by the first terminal device and successfully preempted by other terminal devices includes at least one resource, and the target resource is the resource with the highest position in the time domain among the at least one resource; the processing The unit 1210 is configured to select a reselection resource for the target resource from the first resource set.
可选地,所述处理单元1210用于:从第三资源集合中选择第二资源,所述第三资源集合包括所述资源选择窗内未被所述其他终端设备预留的资源、以及满足第一条件的资源,所述第二资源是针对所述至少一个资源中除所述目标资源之外的资源的重选资源;所述通信单元1220用于:在所述第二资源上发送重传数据。Optionally, the processing unit 1210 is configured to select a second resource from a third resource set, where the third resource set includes resources that are not reserved by the other terminal device in the resource selection window, and The resource of the first condition, the second resource is a reselection resource for resources other than the target resource in the at least one resource; the communication unit 1220 is configured to: send a reselection on the second resource Transfer data.
可选地,所述第一资源集合和/或第三资源集合不包括所述第一终端设备预留的不进行资源重选的资源所处时隙中的全部资源,所述不进行资源重选的资源为所述第一终端设备预留的且没有被其他终端设备成功抢占的资源。Optionally, the first resource set and/or the third resource set do not include all resources in the time slot where the resource reserved by the first terminal device is not reselected, and the resource reselection is not performed The selected resource is a resource reserved by the first terminal device and not successfully preempted by other terminal devices.
可选地,所述满足第一条件的资源为其他终端设备通过第一物理侧行控制信道PSCCH预留的资源,所述第一PSCCH为信号质量小于第一预设阈值、或调度的物理侧行共享信道PSSCH的信号质量小于第二预设阈值的PSCCH。Optionally, the resource that meets the first condition is a resource reserved by other terminal equipment through the first physical side line control channel PSCCH, and the first PSCCH is a physical side whose signal quality is less than a first preset threshold or scheduled The signal quality of the line shared channel PSSCH is less than the PSCCH of the second preset threshold.
可选地,所述第一预设阈值和/或所述第二预设阈值是网络设备配置给所述第一终端设备的。Optionally, the first preset threshold and/or the second preset threshold are configured by the network device to the first terminal device.
可选地,所述信号质量是通过以下中的至少一个表示的:参考信号接收功率RSRP、参考信号接收质量RSRQ、接收信号强度指示RSSI、信号与干扰加噪声比SINR。Optionally, the signal quality is represented by at least one of the following: reference signal received power RSRP, reference signal received quality RSRQ, received signal strength indicator RSSI, signal to interference plus noise ratio SINR.
可选地,所述其他终端设备通过第一PSCCH预留的资源是所述第一终端设备在资源侦听窗内通过侦听所述第一PSCCH确定的。Optionally, the resource reserved by the other terminal device through the first PSCCH is determined by the first terminal device by listening to the first PSCCH within a resource listening window.
可选地,所述资源侦听窗对应的时间范围为[n-T0,n],时刻n为所述第一终端设备需要进行初始资源选择的时刻、或时刻n为所述第一终端设备有数据到达并在一定条件下触发资源重选的时刻、或时刻n为所述第一终端设备确定其预留的资源被其他终端设备成功抢占的时刻,所述T0是协议中预定义的。Optionally, the time range corresponding to the resource listening window is [n-T0, n], and time n is the time when the first terminal device needs to perform initial resource selection, or time n is the first terminal device The time when data arrives and resource reselection is triggered under certain conditions, or time n is the time when the first terminal device determines that its reserved resources are successfully preempted by other terminal devices, and the T0 is predefined in the protocol.
可选地,所述资源选择窗对应的时间范围为[n+T1,n+T2],T1大于0,T2大于T1,时刻n为所述第一终端设备需要进行初始资源选择的时刻、或时刻n为所述第一终端设备有数据到达并在一定条件下触发资源重选的时刻、或时刻n为所述第一终端设备确定其预留的资源被其他终端设备成功抢占的时刻。Optionally, the time range corresponding to the resource selection window is [n+T1, n+T2], T1 is greater than 0, T2 is greater than T1, and time n is the time when the first terminal device needs to perform initial resource selection, or Time n is the time when the first terminal device has data arrived and resource reselection is triggered under certain conditions, or time n is the time when the first terminal device determines that its reserved resources are successfully preempted by other terminal devices.
可选地,所述T2是根据数据的最大传输时延确定的。Optionally, the T2 is determined according to the maximum transmission delay of data.
可选地,所述通信单元1220用于:在所述第一资源上同时发送PSCCH和PSSCH。Optionally, the communication unit 1220 is configured to simultaneously send PSCCH and PSSCH on the first resource.
可选地,所述PSCCH用于指示所述第一终端设备预留的资源位置。Optionally, the PSCCH is used to indicate the resource location reserved by the first terminal device.
可选地,所述处理单元1210用于:在所述第一资源集合为空、或所述第一资源集合满足第二条件情况下,从第二资源集合或第三资源集合中选择所述第一资源;其中,所述第二资源集合和所述第三资源集合包括所述资源选择窗内未被所述其他终端设备预留的资源、以及其他终端设备通过第一PSCCH预留的资源,所述第一PSCCH为信号质量小于预设阈值、或调度的PSSCH的信号质量小于预设阈值的PSCCH;所述第二条件为所述第一资源集合中的所有资源均是所述第二资源集合或所述第三资源集合中时域位置高于第三预设阈值的资源。Optionally, the processing unit 1210 is configured to: when the first resource set is empty or the first resource set satisfies a second condition, select the second resource set or the third resource set The first resource; wherein the second resource set and the third resource set include resources not reserved by the other terminal devices in the resource selection window, and resources reserved by other terminal devices through the first PSCCH The first PSCCH is a PSCCH whose signal quality is less than a preset threshold or the signal quality of a scheduled PSSCH is less than a preset threshold; the second condition is that all resources in the first resource set are the second The resource set or the resource whose time domain position is higher than the third preset threshold in the third resource set.
可选地,所述第二条件为集合中的所有资源均是所述第二资源集合或所述第三资源集合中时域位置最高的资源。Optionally, the second condition is that all resources in the set are the resources with the highest time domain position in the second resource set or the third resource set.
可选地,在一些实施例中,上述通信模块可以是通信接口或收发器,或者是通信芯片或者片上系统的输入输出接口。上述确定模块可以是一个或多个处理器。Optionally, in some embodiments, the above-mentioned communication module may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip. The aforementioned determining module may be one or more processors.
图13是本申请实施例提供的一种通信设备1300示意性结构图。图13所示的通信设备1300包括处理器1310,处理器1310可以从存储器中调用并运行计算机程序,以实现本申请实施例中的方法。FIG. 13 is a schematic structural diagram of a communication device 1300 according to an embodiment of the present application. The communication device 1300 shown in FIG. 13 includes a processor 1310, and the processor 1310 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
可选地,如图13所示,通信设备1300还可以包括存储器1320。其中,处理器1310 可以从存储器1320中调用并运行计算机程序,以实现本申请实施例中的方法。Optionally, as shown in FIG. 13, the communication device 1300 may further include a memory 1320. The processor 1310 can call and run a computer program from the memory 1320 to implement the method in the embodiment of the present application.
其中,存储器1320可以是独立于处理器1310的一个单独的器件,也可以集成在处理器1310中。The memory 1320 may be a separate device independent of the processor 1310, or may be integrated in the processor 1310.
可选地,如图13所示,通信设备1300还可以包括收发器1330,处理器1310可以控制该收发器1330与其他设备进行通信,具体地,可以向其他设备发送信息或数据,或接收其他设备发送的信息或数据。Optionally, as shown in FIG. 13, the communication device 1300 may further include a transceiver 1330, and the processor 1310 may control the transceiver 1330 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.
其中,收发器1330可以包括发射机和接收机。收发器1330还可以进一步包括天线,天线的数量可以为一个或多个。Among them, the transceiver 1330 may include a transmitter and a receiver. The transceiver 1330 may further include an antenna, and the number of antennas may be one or more.
可选地,该通信设备1300具体可为本申请实施例的网络设备,并且该通信设备1300可以实现本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。Optionally, the communication device 1300 may specifically be a network device of an embodiment of the application, and the communication device 1300 may implement the corresponding process implemented by the network device in each method of the embodiment of the application. For brevity, details are not repeated here. .
可选地,该通信设备1300具体可为本申请实施例的移动终端/终端设备,例如,该通信设备1300可以为第一终端设备,并且该通信设备1300可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。Optionally, the communication device 1300 may specifically be a mobile terminal/terminal device of an embodiment of the present application. For example, the communication device 1300 may be a first terminal device, and the communication device 1300 may implement various methods in the embodiments of the present application. For the sake of brevity, the corresponding process implemented by the mobile terminal/terminal device will not be repeated here.
图14是本申请实施例的装置的示意性结构图。图14所示的装置1400包括处理器1410,处理器1410可以从存储器中调用并运行计算机程序,以实现本申请实施例中的方法。Fig. 14 is a schematic structural diagram of a device according to an embodiment of the present application. The apparatus 1400 shown in FIG. 14 includes a processor 1410, and the processor 1410 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
可选地,如图14所示,装置1400还可以包括存储器1420。其中,处理器1410可以从存储器1420中调用并运行计算机程序,以实现本申请实施例中的方法。Optionally, as shown in FIG. 14, the apparatus 1400 may further include a memory 1420. The processor 1410 may call and run a computer program from the memory 1420 to implement the method in the embodiment of the present application.
其中,存储器1420可以是独立于处理器1410的一个单独的器件,也可以集成在处理器1410中。The memory 1420 may be a separate device independent of the processor 1410, or may be integrated in the processor 1410.
可选地,该装置1400还可以包括输入接口1430。其中,处理器1410可以控制该输入接口1430与其他设备或装置进行通信,具体地,可以获取其他设备或装置发送的信息或数据。Optionally, the device 1400 may further include an input interface 1430. The processor 1410 can control the input interface 1430 to communicate with other devices or devices, and specifically, can obtain information or data sent by other devices or devices.
可选地,该装置1400还可以包括输出接口1440。其中,处理器1410可以控制该输出接口1440与其他设备或装置进行通信,具体地,可以向其他设备或装置输出信息或数据。Optionally, the device 1400 may further include an output interface 1440. The processor 1410 can control the output interface 1440 to communicate with other devices or devices, and specifically, can output information or data to other devices or devices.
可选地,该装置可应用于本申请实施例中的网络设备,并且该装置可以实现本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。Optionally, the device can be applied to the network equipment in the embodiments of the present application, and the device can implement the corresponding processes implemented by the network equipment in the various methods of the embodiments of the present application. For the sake of brevity, details are not described herein again.
可选地,该装置可应用于本申请实施例中的移动终端/终端设备,并且该装置可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。Optionally, the device can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the device can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application. For the sake of brevity, here No longer.
应理解,本申请实施例提到的装置可以为芯片,该芯片还可以称为系统级芯片,系统芯片,芯片系统或片上系统芯片等。It should be understood that the device mentioned in the embodiment of the present application may be a chip, and the chip may also be called a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-chip.
图15是本申请实施例提供的一种通信系统1500的示意性框图。如图15所示,该通信系统1500包括第一终端设备1510和其他终端设备1520。FIG. 15 is a schematic block diagram of a communication system 1500 according to an embodiment of the present application. As shown in FIG. 15, the communication system 1500 includes a first terminal device 1510 and other terminal devices 1520.
其中,该第一终端设备1510可以用于实现上述方法中由第一终端设备实现的相应的功能,以及该其他终端设备1520可以用于实现上述方法中由其他终端设备实现的相应的功能为了简洁,在此不再赘述。Wherein, the first terminal device 1510 can be used to implement the corresponding function implemented by the first terminal device in the above method, and the other terminal device 1520 can be used to implement the corresponding function implemented by the other terminal device in the above method. For brevity , I won’t repeat it here.
应理解,本申请实施例的处理器可能是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现成可编程门阵列(Field Programmable Gate Array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用 译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器,处理器读取存储器中的信息,结合其硬件完成上述方法的步骤。It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
可以理解,本申请实施例中的存储器可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(Read-Only Memory,ROM)、可编程只读存储器(Programmable ROM,PROM)、可擦除可编程只读存储器(Erasable PROM,EPROM)、电可擦除可编程只读存储器(Electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(Static RAM,SRAM)、动态随机存取存储器(Dynamic RAM,DRAM)、同步动态随机存取存储器(Synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM,DR RAM)。应注意,本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。It can be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), Synchronous Link Dynamic Random Access Memory (Synchlink DRAM, SLDRAM) ) And Direct Rambus RAM (DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.
应理解,上述存储器为示例性但不是限制性说明,例如,本申请实施例中的存储器还可以是静态随机存取存储器(static RAM,SRAM)、动态随机存取存储器(dynamic RAM,DRAM)、同步动态随机存取存储器(synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(synch link DRAM,SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM,DR RAM)等等。也就是说,本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。It should be understood that the foregoing memory is exemplary but not restrictive. For example, the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.
本申请实施例还提供了一种计算机可读存储介质,用于存储计算机程序。The embodiments of the present application also provide a computer-readable storage medium for storing computer programs.
可选的,该计算机可读存储介质可应用于本申请实施例中的网络设备,并且该计算机程序使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。Optionally, the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, here No longer.
可选地,该计算机可读存储介质可应用于本申请实施例中的移动终端/终端设备,并且该计算机程序使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。Optionally, the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application , For the sake of brevity, I won’t repeat it here.
本申请实施例还提供了一种计算机程序产品,包括计算机程序指令。The embodiments of the present application also provide a computer program product, including computer program instructions.
可选的,该计算机程序产品可应用于本申请实施例中的网络设备,并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。Optionally, the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, it is not here. Go into details again.
可选地,该计算机程序产品可应用于本申请实施例中的移动终端/终端设备,并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。Optionally, the computer program product can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, For the sake of brevity, I will not repeat them here.
本申请实施例还提供了一种计算机程序。The embodiment of the present application also provides a computer program.
可选的,该计算机程序可应用于本申请实施例中的网络设备,当该计算机程序在计算机上运行时,使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。Optionally, the computer program can be applied to the network device in the embodiment of the present application. When the computer program runs on the computer, it causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity , I won’t repeat it here.
可选地,该计算机程序可应用于本申请实施例中的移动终端/终端设备,当该计算机程序在计算机上运行时,使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。Optionally, the computer program can be applied to the mobile terminal/terminal device in the embodiment of the present application. When the computer program runs on the computer, the computer executes each method in the embodiment of the present application. For the sake of brevity, the corresponding process will not be repeated here.
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。针对这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. In response to this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disks or optical disks and other media that can store program codes. .
以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应所述以权利要求的保护范围为准。The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.
Claims (42)
- 一种选择资源的方法,其特征在于,包括:A method for selecting resources, characterized in that it includes:在第一终端设备进行初始资源选择、或所述第一终端设备有数据到达并在一定条件下触发资源重选、或所述第一终端设备确定其预留的资源被其他终端设备成功抢占的情况下,所述第一终端设备从第一资源集合中选择第一资源,所述第一资源集合不包括资源选择窗内被其他终端设备预留的资源;Initial resource selection is performed on the first terminal device, or the first terminal device has data arrived and resource reselection is triggered under certain conditions, or the first terminal device determines that its reserved resources are successfully preempted by other terminal devices In a case, the first terminal device selects a first resource from a first resource set, and the first resource set does not include resources reserved by other terminal devices in the resource selection window;所述第一终端设备在所述第一资源上进行数据传输。The first terminal device performs data transmission on the first resource.
- 根据权利要求1所述的方法,其特征在于,在所述第一终端设备进行初始资源选择、或所述第一终端设备有数据到达并在一定条件下触发资源重选的情况下,所述第一终端设备从第一资源集合中选择第一资源,包括:The method according to claim 1, wherein when the first terminal device performs initial resource selection, or the first terminal device has data arriving and triggers resource reselection under certain conditions, the The first terminal device selects the first resource from the first resource set, including:所述第一终端设备从所述第一资源集合中选择初传资源。The first terminal device selects the initial transmission resource from the first resource set.
- 根据权利要求2所述的方法,其特征在于,所述方法还包括:The method according to claim 2, wherein the method further comprises:所述第一终端设备从第二资源集合中选择重传资源,所述第二资源集合包括所述资源选择窗内未被其他终端设备预留的资源、以及满足第一条件的资源;The first terminal device selects retransmission resources from a second resource set, where the second resource set includes resources that are not reserved by other terminal devices in the resource selection window and resources that meet a first condition;所述第一终端设备在所述重传资源上发送重传数据。The first terminal device sends retransmission data on the retransmission resource.
- 根据权利要求1所述的方法,其特征在于,所述第一终端设备预留的且被其他终端设备成功抢占的资源为重传资源。The method according to claim 1, wherein the resources reserved by the first terminal device and successfully preempted by other terminal devices are retransmission resources.
- 根据权利要求4所述的方法,其特征在于,所述第一终端设备确定其预留的且被其他终端设备成功抢占的资源包括至少一个资源,目标资源为所述至少一个资源中时域位置最靠前的资源;The method according to claim 4, wherein the first terminal device determines that the resource reserved by the first terminal device and successfully preempted by other terminal devices includes at least one resource, and the target resource is a time domain position in the at least one resource The top resources;所述第一终端设备从第一资源集合中选择第一资源,包括:The selection of the first resource from the first resource set by the first terminal device includes:所述第一终端设备从所述第一资源集合中选择针对所述目标资源的重选资源。The first terminal device selects a reselection resource for the target resource from the first resource set.
- 根据权利要求5所述的方法,其特征在于,所述方法还包括:The method according to claim 5, wherein the method further comprises:所述第一终端设备从第三资源集合中选择第二资源,所述第三资源集合包括所述资源选择窗内未被所述其他终端设备预留的资源、以及满足第一条件的资源,所述第二资源是针对所述至少一个资源中除所述目标资源之外的资源的重选资源;The first terminal device selects a second resource from a third resource set, and the third resource set includes resources that are not reserved by the other terminal devices in the resource selection window and resources that meet a first condition, The second resource is a reselection resource for resources other than the target resource in the at least one resource;所述第一终端设备在所述第二资源上发送重传数据。The first terminal device sends retransmission data on the second resource.
- 根据权利要求4-6中任一项所述的方法,其特征在于,所述第一资源集合和/或第三资源集合不包括所述第一终端设备预留的不进行资源重选的资源所处时隙中的全部资源,所述不进行资源重选的资源为所述第一终端设备预留的且没有被其他终端设备成功抢占的资源。The method according to any one of claims 4-6, wherein the first resource set and/or the third resource set do not include resources reserved by the first terminal device without resource reselection For all resources in the time slot, the resources for which resource reselection is not performed are resources reserved by the first terminal device and not successfully preempted by other terminal devices.
- 根据权利要求3或6所述的方法,其特征在于,所述满足第一条件的资源为其他终端设备通过第一物理侧行控制信道PSCCH预留的资源,所述第一PSCCH为信号质量小于第一预设阈值、或调度的物理侧行共享信道PSSCH的信号质量小于第二预设阈值的PSCCH。The method according to claim 3 or 6, wherein the resource that meets the first condition is a resource reserved by other terminal equipment through the first physical side control channel PSCCH, and the first PSCCH has a signal quality less than The first preset threshold or the PSCCH whose signal quality of the scheduled physical side-line shared channel PSSCH is less than the second preset threshold.
- 根据权利要求8所述的方法,其特征在于,所述第一预设阈值和/或所述第二预设阈值是网络设备配置给所述第一终端设备的。The method according to claim 8, wherein the first preset threshold and/or the second preset threshold are configured by a network device to the first terminal device.
- 根据权利要求8或9所述的方法,其特征在于,所述信号质量是通过以下中的至少一个表示的:参考信号接收功率RSRP、参考信号接收质量RSRQ、接收信号强度指示RSSI、信号与干扰加噪声比SINR。The method according to claim 8 or 9, wherein the signal quality is represented by at least one of the following: reference signal received power RSRP, reference signal received quality RSRQ, received signal strength indicator RSSI, signal and interference Add noise ratio SINR.
- 根据权利要求8-10中任一项所述的方法,其特征在于,所述其他终端设备通过第一PSCCH预留的资源是所述第一终端设备在资源侦听窗内通过侦听所述第一PSCCH确定的。The method according to any one of claims 8-10, wherein the resources reserved by the other terminal equipment through the first PSCCH are those of the first terminal equipment through listening to the The first PSCCH is determined.
- 根据权利要求11所述的方法,其特征在于,所述资源侦听窗对应的时间范围为[n-T0,n],时刻n为所述第一终端设备需要进行初始资源选择的时刻、或时刻n为所述第一终 端设备有数据到达并在一定条件下触发资源重选的时刻、或时刻n为所述第一终端设备确定其预留的资源被其他终端设备成功抢占的时刻,所述T0是协议中预定义的。The method according to claim 11, wherein the time range corresponding to the resource listening window is [n-T0,n], and time n is the time when the first terminal device needs to perform initial resource selection, or Time n is the time when the first terminal device has data arrived and resource reselection is triggered under certain conditions, or time n is the time when the first terminal device determines that its reserved resources are successfully preempted by other terminal devices, so The T0 is predefined in the protocol.
- 根据权利要求1-12中任一项所述的方法,其特征在于,所述资源选择窗对应的时间范围为[n+T1,n+T2],T1大于0,T2大于T1,时刻n为所述第一终端设备需要进行初始资源选择的时刻、或时刻n为所述第一终端设备有数据到达并在一定条件下触发资源重选的时刻、或时刻n为所述第一终端设备确定其预留的资源被其他终端设备成功抢占的时刻。The method according to any one of claims 1-12, wherein the time range corresponding to the resource selection window is [n+T1, n+T2], T1 is greater than 0, T2 is greater than T1, and time n is The time at which the first terminal device needs to perform initial resource selection, or time n is the time when the first terminal device has data arriving and triggers resource reselection under certain conditions, or the time n is determined by the first terminal device The moment when the reserved resources are successfully preempted by other terminal devices.
- 根据权利要求13所述的方法,其特征在于,所述T2是根据数据的最大传输时延确定的。The method according to claim 13, wherein the T2 is determined according to the maximum transmission delay of the data.
- 根据权利要求1-14中任一项所述的方法,其特征在于,所述第一终端设备在所述第一资源上进行数据传输,包括:The method according to any one of claims 1-14, wherein the first terminal device performing data transmission on the first resource comprises:所述第一终端设备在所述第一资源上同时发送PSCCH和PSSCH。The first terminal device simultaneously transmits PSCCH and PSSCH on the first resource.
- 根据权利要求15所述的方法,其特征在于,所述PSCCH用于指示所述第一终端设备预留的资源位置。The method according to claim 15, wherein the PSCCH is used to indicate a resource location reserved by the first terminal device.
- 根据权利要求1-16中任一项所述的方法,其特征在于,所述方法还包括:The method according to any one of claims 1-16, wherein the method further comprises:在所述第一资源集合为空、或所述第一资源集合满足第二条件情况下,所述第一终端设备从第二资源集合或第三资源集合中选择所述第一资源;In the case that the first resource set is empty or the first resource set satisfies a second condition, the first terminal device selects the first resource from a second resource set or a third resource set;其中,所述第二资源集合和所述第三资源集合包括所述资源选择窗内未被所述其他终端设备预留的资源、以及其他终端设备通过第一PSCCH预留的资源,所述第一PSCCH为信号质量小于预设阈值、或调度的PSSCH的信号质量小于预设阈值的PSCCH;Wherein, the second resource set and the third resource set include resources that are not reserved by the other terminal devices in the resource selection window, and resources reserved by other terminal devices through the first PSCCH. A PSCCH is a PSCCH whose signal quality is less than the preset threshold or the signal quality of the scheduled PSSCH is less than the preset threshold;所述第二条件为所述第一资源集合中的所有资源均是所述第二资源集合或所述第三资源集合中时域位置高于第三预设阈值的资源。The second condition is that all resources in the first resource set are resources whose time domain positions in the second resource set or the third resource set are higher than a third preset threshold.
- 根据权利要求17所述的方法,其特征在于,所述第二条件为集合中的所有资源均是所述第二资源集合或所述第三资源集合中时域位置最高的资源。The method according to claim 17, wherein the second condition is that all resources in the set are the resources with the highest time domain position in the second resource set or the third resource set.
- 一种终端设备,所述终端设备为第一终端设备,其特征在于,包括:A terminal device, the terminal device being a first terminal device, characterized in that it comprises:处理单元,用于在第一终端设备进行初始资源选择、或所述第一终端设备有数据到达并在一定条件下触发资源重选、或所述第一终端设备确定其预留的资源被其他终端设备成功抢占的情况下,从第一资源集合中选择第一资源,所述第一资源集合不包括资源选择窗内被其他终端设备预留的资源;The processing unit is configured to perform initial resource selection on the first terminal device, or the first terminal device has data arriving and trigger resource reselection under certain conditions, or the first terminal device determines that its reserved resources are used by others In the case that the terminal device successfully preempts, select the first resource from the first resource set, and the first resource set does not include the resources reserved by other terminal devices in the resource selection window;通信单元,用于在所述第一资源上进行数据传输。The communication unit is configured to perform data transmission on the first resource.
- 根据权利要求19所述的终端设备,其特征在于,所述处理单元用于:在所述第一终端设备进行初始资源选择、或所述第一终端设备有数据到达并在一定条件下触发资源重选的情况下,从所述第一资源集合中选择初传资源。The terminal device according to claim 19, wherein the processing unit is configured to: perform initial resource selection on the first terminal device, or the first terminal device has data arriving and trigger resources under certain conditions In the case of reselection, the initial transmission resource is selected from the first resource set.
- 根据权利要求20所述的终端设备,其特征在于,所述处理单元用于:The terminal device according to claim 20, wherein the processing unit is configured to:从第二资源集合中选择重传资源,所述第二资源集合包括所述资源选择窗内未被其他终端设备预留的资源、以及满足第一条件的资源;Selecting a retransmission resource from a second resource set, where the second resource set includes resources that are not reserved by other terminal devices in the resource selection window and resources that meet the first condition;所述通信单元用于:在所述重传资源上发送重传数据。The communication unit is configured to send retransmission data on the retransmission resource.
- 根据权利要求19所述的终端设备,其特征在于,所述第一终端设备预留的且被其他终端设备成功抢占的资源为重传资源。The terminal device according to claim 19, wherein the resources reserved by the first terminal device and successfully preempted by other terminal devices are retransmission resources.
- 根据权利要求22所述的终端设备,其特征在于,所述第一终端设备确定其预留的且被其他终端设备成功抢占的资源包括至少一个资源,目标资源为所述至少一个资源中时域位置最靠前的资源;The terminal device according to claim 22, wherein the first terminal device determines that the resource reserved by the first terminal device and successfully preempted by other terminal devices includes at least one resource, and the target resource is the time domain of the at least one resource. The most advanced resource;所述处理单元用于:The processing unit is used for:从所述第一资源集合中选择针对所述目标资源的重选资源。Select a reselection resource for the target resource from the first resource set.
- 根据权利要求23所述的终端设备,其特征在于,所述处理单元用于:The terminal device according to claim 23, wherein the processing unit is configured to:从第三资源集合中选择第二资源,所述第三资源集合包括所述资源选择窗内未被所述 其他终端设备预留的资源、以及满足第一条件的资源,所述第二资源是针对所述至少一个资源中除所述目标资源之外的资源的重选资源;A second resource is selected from a third resource set, and the third resource set includes resources that are not reserved by the other terminal devices in the resource selection window and resources that meet the first condition, and the second resource is Reselecting resources for resources other than the target resource in the at least one resource;所述通信单元用于:The communication unit is used for:在所述第二资源上发送重传数据。Send retransmission data on the second resource.
- 根据权利要求22-24中任一项所述的终端设备,其特征在于,所述第一资源集合和/或第三资源集合不包括所述第一终端设备预留的不进行资源重选的资源所处时隙中的全部资源,所述不进行资源重选的资源为所述第一终端设备预留的且没有被其他终端设备成功抢占的资源。The terminal device according to any one of claims 22-24, wherein the first resource set and/or the third resource set do not include those reserved by the first terminal device that do not perform resource reselection All resources in the time slot where the resource is located, and the resource for which resource reselection is not performed is a resource reserved by the first terminal device and not successfully preempted by other terminal devices.
- 根据权利要求21或24所述的终端设备,其特征在于,所述满足第一条件的资源为其他终端设备通过第一物理侧行控制信道PSCCH预留的资源,所述第一PSCCH为信号质量小于第一预设阈值、或调度的物理侧行共享信道PSSCH的信号质量小于第二预设阈值的PSCCH。The terminal device according to claim 21 or 24, wherein the resource that satisfies the first condition is a resource reserved by other terminal devices through the first physical side control channel PSCCH, and the first PSCCH is the signal quality PSCCH that is less than the first preset threshold or the signal quality of the scheduled physical side-line shared channel PSSCH is less than the second preset threshold.
- 根据权利要求26所述的终端设备,其特征在于,所述第一预设阈值和/或所述第二预设阈值是网络设备配置给所述第一终端设备的。The terminal device according to claim 26, wherein the first preset threshold and/or the second preset threshold are configured by a network device to the first terminal device.
- 根据权利要求26或27所述的终端设备,其特征在于,所述信号质量是通过以下中的至少一个表示的:参考信号接收功率RSRP、参考信号接收质量RSRQ、接收信号强度指示RSSI、信号与干扰加噪声比SINR。The terminal device according to claim 26 or 27, wherein the signal quality is represented by at least one of the following: reference signal received power RSRP, reference signal received quality RSRQ, received signal strength indicator RSSI, signal and Interference plus noise ratio SINR.
- 根据权利要求26-28中任一项所述的终端设备,其特征在于,所述其他终端设备通过第一PSCCH预留的资源是所述第一终端设备在资源侦听窗内通过侦听所述第一PSCCH确定的。The terminal device according to any one of claims 26-28, wherein the resources reserved by the other terminal devices through the first PSCCH are the resources that the first terminal device passes through in the resource listening window. The first PSCCH is determined.
- 根据权利要求29所述的终端设备,其特征在于,所述资源侦听窗对应的时间范围为[n-T0,n],时刻n为所述第一终端设备需要进行初始资源选择的时刻、或时刻n为所述第一终端设备有数据到达并在一定条件下触发资源重选的时刻、或时刻n为所述第一终端设备确定其预留的资源被其他终端设备成功抢占的时刻,所述T0是协议中预定义的。The terminal device according to claim 29, wherein the time range corresponding to the resource listening window is [n-T0, n], and time n is the time when the first terminal device needs to perform initial resource selection, Or time n is the time when the first terminal device has data arrived and resource reselection is triggered under certain conditions, or time n is the time when the first terminal device determines that its reserved resources are successfully preempted by other terminal devices, The T0 is predefined in the protocol.
- 根据权利要求19-30中任一项所述的终端设备,其特征在于,所述资源选择窗对应的时间范围为[n+T1,n+T2],T1大于0,T2大于T1,时刻n为所述第一终端设备需要进行初始资源选择的时刻、或时刻n为所述第一终端设备有数据到达并在一定条件下触发资源重选的时刻、或时刻n为所述第一终端设备确定其预留的资源被其他终端设备成功抢占的时刻。The terminal device according to any one of claims 19-30, wherein the time range corresponding to the resource selection window is [n+T1, n+T2], T1 is greater than 0, T2 is greater than T1, and time n The time when the first terminal device needs to perform the initial resource selection, or the time n is the time when the first terminal device has data arriving and triggers resource reselection under certain conditions, or the time n is the first terminal device Determine the moment when the reserved resources are successfully preempted by other terminal devices.
- 根据权利要求31所述的终端设备,其特征在于,所述T2是根据数据的最大传输时延确定的。The terminal device according to claim 31, wherein the T2 is determined according to the maximum transmission delay of the data.
- 根据权利要求19-32中任一项所述的终端设备,其特征在于,所述通信单元用于:The terminal device according to any one of claims 19-32, wherein the communication unit is configured to:在所述第一资源上同时发送PSCCH和PSSCH。PSCCH and PSSCH are simultaneously transmitted on the first resource.
- 根据权利要求33所述的终端设备,其特征在于,所述PSCCH用于指示所述第一终端设备预留的资源位置。The terminal device according to claim 33, wherein the PSCCH is used to indicate a resource location reserved by the first terminal device.
- 根据权利要求19-34中任一项所述的终端设备,其特征在于,所述处理单元用于:The terminal device according to any one of claims 19-34, wherein the processing unit is configured to:在所述第一资源集合为空、或所述第一资源集合满足第二条件情况下,从第二资源集合或第三资源集合中选择所述第一资源;In the case that the first resource set is empty or the first resource set satisfies a second condition, select the first resource from the second resource set or the third resource set;其中,所述第二资源集合和所述第三资源集合包括所述资源选择窗内未被所述其他终端设备预留的资源、以及其他终端设备通过第一PSCCH预留的资源,所述第一PSCCH为信号质量小于预设阈值、或调度的PSSCH的信号质量小于预设阈值的PSCCH;Wherein, the second resource set and the third resource set include resources that are not reserved by the other terminal devices in the resource selection window, and resources reserved by other terminal devices through the first PSCCH. A PSCCH is a PSCCH whose signal quality is less than the preset threshold or the signal quality of the scheduled PSSCH is less than the preset threshold;所述第二条件为所述第一资源集合中的所有资源均是所述第二资源集合或所述第三资源集合中时域位置高于第三预设阈值的资源。The second condition is that all resources in the first resource set are resources whose time domain positions in the second resource set or the third resource set are higher than a third preset threshold.
- 根据权利要求35所述的终端设备,其特征在于,所述第二条件为集合中的所有资源均是所述第二资源集合或所述第三资源集合中时域位置最高的资源。The terminal device according to claim 35, wherein the second condition is that all resources in the set are the resources with the highest time domain position in the second resource set or the third resource set.
- 一种终端设备,其特征在于,所述终端设备包括处理器和存储器,所述存储器用于存储计算机程序,所述处理器用于调用并运行所述存储器中存储的计算机程序,以执行权利要求1至18中任一项所述的方法。A terminal device, wherein the terminal device includes a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute claim 1. The method of any one of to 18.
- 一种装置,其特征在于,所述装置包括处理器,所述处理器用于从存储器中调用并运行计算机程序,使得安装有所述装置的设备执行权利要求1至18中任一项所述的方法。A device, characterized in that the device comprises a processor, and the processor is used to call and run a computer program from a memory, so that a device installed with the device executes the device described in any one of claims 1 to 18. method.
- 一种计算机可读存储介质,其特征在于,用于存储计算机程序,所述计算机程序使得计算机执行权利要求1至18中任一项所述的方法。A computer-readable storage medium, characterized in that it is used to store a computer program that enables a computer to execute the method according to any one of claims 1 to 18.
- 一种计算机程序产品,其特征在于,包括计算机程序指令,所述计算机程序指令使得计算机执行权利要求1至18中任一项所述的方法。A computer program product, characterized by comprising computer program instructions that cause a computer to execute the method according to any one of claims 1 to 18.
- 一种计算机程序,其特征在于,所述计算机程序使得计算机执行权利要求1至18中任一项所述的方法。A computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 18.
- 一种通信系统,其特征在于,包括如权利要求19至36中任一项所述的终端设备A communication system, characterized by comprising the terminal equipment according to any one of claims 19 to 36
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