V2X Resource Scheduling Method and Apparatus, Storage Medium, and User Equipment

Abstract

A V2X resource scheduling method, apparatus, storage medium, and user equipment. The V2X resource scheduling method includes: receiving a downlink signaling from a base station, where the downlink signaling can indicate resource selection information; determining direct link transmission resources for at least one direct link based at least on the resource selection information. The technical solution of the present invention can improve the utilization efficiency of V2X scheduling resources to improve the V2X transmission efficiency.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and in particular, to a V2X resource scheduling method, apparatus, storage medium, and user equipment. Background Art

[0002] In the communication standard protocol version 12 (Release 12), the Long Term Evolution (LTE) system introduced direct communication. Multiple User Equipments (UEs) can communicate directly through the PC5 interface. The PC5 interface is the direct interface between UEs. In the prior art, there are two modes of resource allocation. One is the scheduled resource allocation mode, which is configured by the base station through dedicated signaling. The other is the autonomous resource selection mode. The base station can provide a resource pool for direct communication to the UE through system messages or Radio Resource Control (RRC) signaling, and the UE selects resources for direct communication from the resource pool. If the Transmitter UE is not within the network coverage area, the UE adopts the autonomous resource selection mode to select resources for direct communication from a pre-configured resource pool.

[0003] In the prior art, based on direct communication, the 3rd Generation Partnership Project (3GPP) also supports Vehicle-to-Everything (V2X). And 3GPP is studying the introduction of V2X in the New Radio (NR) system. Because the 5G system can provide greater bandwidth and lower latency, which can better meet the service requirements of V2X.

[0004] In NR V2X, the resource allocation method in LTE is basically continued. For example, mode 1 is introduced: the base station schedules the transmission resources for V2X data for the UE; mode 2: the UE determines the transmission resources for V2X data, and the UE selects the transmission resources based on the resource pool configured by the network or the pre-configured resource pool. When the UE needs to adopt mode 1, the UE needs to be in the RRC connected state. The base station can schedule the transmission resources for V2X data for the UE through RRC signaling or downlink control signaling (Downlink Control Information, DCI). After receiving the scheduled resources, the UE sends V2X data to the Rx UE (Receive UE) through the PC5 interface in the time slot applicable to the scheduled resources. In Mode 1, a Tx UE may transmit V2X data to multiple UEs simultaneously. At this time, the Tx UE establishes unicast channels of direct links with multiple UEs at the same time. The Tx UE can provide the link quality information of these direct links to the base station so that the base station can reasonably schedule the transmission resources of the Tx UE to adapt to the channel conditions of different direct links.

[0005] However, in mode 1, for the transmission resources scheduled by the base station for the UE for V2X data, the UE independently determines the receiving UE (i.e., Rx UE) to which the resources are applied, which may cause the Tx UE to apply inappropriate transmission resources to a certain receiving UE, resulting in transmission failure. Summary of the Invention

[0006] The technical problem solved by the present invention is how to improve the utilization efficiency of V2X scheduling resources to improve V2X transmission efficiency.

[0007] To solve the above technical problem, an embodiment of the present invention provides a V2X resource scheduling method. The V2X resource scheduling method includes: receiving a downlink signal from a base station, where the downlink signal can indicate resource selection information; determining direct link transmission resources for at least one direct link at least according to the resource selection information.

[0008] Optionally, the resource selection information includes modulation and coding parameters corresponding to the direct link transmission resources. The determining direct link transmission resources for at least one direct link according to the resource selection information includes: determining the modulation and coding parameters corresponding to each direct link according to a first mapping relationship and the link quality of each direct link, where the first mapping relationship includes multiple link quality values and multiple modulation and coding parameters corresponding to the multiple link quality values; if there are modulation and coding parameters corresponding to a direct link that are consistent with the modulation and coding parameters in the resource selection information, then use the direct link transmission resources indicated by the downlink signal for the data transmission of the direct link.

[0009] Optionally, the modulation and coding parameter is the modulation and coding order.

[0010] Optionally, the resource selection information includes the index of the destination device to which the direct link transmission resource is applied. Determining the direct link transmission resource for at least one direct link according to the resource selection information includes: determining the destination device according to the second mapping relationship and the index of the destination device, where the second mapping relationship includes the indexes of multiple destination devices and their corresponding multiple destination devices; determining the direct link associated with the destination device; and using the direct link transmission resource indicated by the downlink signaling for the associated direct link.

[0011] Optionally, the resource selection information includes the RNTI used for scrambling the downlink signaling. Determining the direct link transmission resource for at least one direct link according to the resource selection information includes: decoding the downlink signaling using different RNTIs and determining the first RNTI used for successfully demodulating the downlink signaling; determining the destination direct link according to the first RNTI and the correspondence between each RNTI and the direct link; and using the direct link transmission resource indicated by the downlink signaling for the destination direct link.

[0012] Optionally, the resource selection information includes the application time domain position of the direct link transmission resource. Determining the direct link transmission resource for at least one direct link according to the resource selection information includes: determining the general modulation and coding parameter and the link quality of each direct link; determining the actual application time domain position of each direct link transmission resource; and if it is determined that the first direct link is applicable to a modulation and coding parameter other than the general modulation and coding parameter, using the direct link transmission resource with the same application time domain position as the application time domain position for the first direct link.

[0013] Optionally, determining the direct link transmission resource for at least one direct link according to the resource selection information includes: determining the general RNTI, the general modulation and coding parameter, and the link quality of each direct link; and if it is determined that the second direct link is applicable to a modulation and coding parameter other than the general modulation and coding parameter, using the direct link transmission resource indicated by the downlink signaling demodulated using an RNTI other than the general RNTI for the second direct link.

[0014] Optionally, determining the direct link transmission resource for at least one direct link according to the resource selection information includes: determining a first direct link applicable to the direct link transmission resource indicated by the downlink signaling according to the resource selection information and the link quality of the at least one direct link; if the number of the first direct links applicable to the same direct link transmission resource is multiple, determining a final direct link applicable to the same direct link transmission resource from the multiple first direct links according to the quality of service requirements of the V2X data transmitted by the at least one direct link.

[0015] Optionally, the direct link transmission resource is a semi-static direct link transmission resource or a dynamic direct link transmission resource scheduled by a serving base station.

[0016] To solve the above technical problems, an embodiment of the present invention also discloses a V2X resource scheduling device, which includes: a downlink signaling receiving module, adapted to receive downlink signaling from a base station, where the downlink signaling can indicate resource selection information; a resource scheduling module, adapted to determine a direct link transmission resource for at least one direct link at least according to the resource selection information.

[0017] An embodiment of the present invention also discloses a storage medium, on which computer instructions are stored, and when the computer instructions run, the steps of the V2X resource scheduling method are executed.

[0018] An embodiment of the present invention also discloses a user equipment, which includes a memory and a processor, where computer instructions that can run on the processor are stored on the memory, and when the processor runs the computer instructions, the steps of the V2X resource scheduling method are executed.

[0019] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0020] The technical solution of the present invention receives downlink signaling from a base station, where the downlink signaling can indicate resource selection information; and determines a direct link transmission resource for at least one direct link at least according to the resource selection information. In the technical solution of the present invention, the base station can directly indicate or indirectly indicate resource selection information through downlink signaling, and the user equipment can determine resource selection information through the downlink signaling from the base station; the user equipment can determine a direct link transmission resource for a direct link at least according to the resource selection information, so as to avoid problems such as transmission failure caused by the user equipment independently determining the direct link transmission resource only by itself, ensure the suitability of the determined transmission resource for the direct link, and further improve the transmission efficiency of V2X.

[0021] Further, the resource selection information includes modulation and coding parameters corresponding to direct link transmission resources, or the resource selection information includes the index of the destination device to which the direct link transmission resources are applied, or the resource selection information includes the RNTI used to scramble the downlink signaling. In the technical solution of the present invention, when the resource selection information includes modulation and coding parameters or the index of the destination device, the resource selection information can be carried in the downlink signaling and sent to the user equipment, and the user equipment can directly obtain the resource selection information from the downlink signaling; when the resource selection information includes the RNTI used to scramble the downlink signaling, the user equipment needs to try to demodulate the downlink signaling to obtain the resource selection information, so as to ensure the flexibility of sending and receiving the resource selection information. Description of the Drawings

[0022] Figure 1 is a flowchart of a V2X resource scheduling method according to an embodiment of the present invention;

[0023] Figure 2 is Figure 1 a flowchart of a specific implementation manner of step S102 shown;

[0024] Figure 3 is Figure 1 a flowchart of another specific implementation manner of step S102 shown;

[0025] Figure 4 is Figure 1 a flowchart of yet another specific implementation manner of step S102 shown;

[0026] Figure 5 is Figure 1 a flowchart of still another specific implementation manner of step S102 shown;

[0027] Figure 6 is Figure 1 a flowchart of still another specific implementation manner of step S102 shown;

[0028] Figure 7 is a schematic structural diagram of a V2X resource scheduling device according to an embodiment of the present invention. Detailed Embodiment

[0029] As described in the background art, in NR V2X mode 1, for the transmission resources scheduled by the serving base station for the UE for V2X data, the UE independently determines the receiving UE (i.e., Rx UE) to which the resources are applied, which may cause the Tx UE to apply inappropriate transmission resources to a certain receiving UE, resulting in a transmission failure.

[0030] In the technical solution of the present invention, the base station can directly indicate or indirectly indicate resource selection information through downlink signaling, and the user equipment can determine the resource selection information through the downlink signaling from the base station; the user equipment can determine the direct link transmission resources for the direct link at least according to the resource selection information, so as to avoid problems such as transmission failures caused by the user equipment independently determining the direct link transmission resources of the direct link, ensure the suitability of the determined transmission resources for the direct link, and further improve the transmission efficiency of V2X.

[0031] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given with reference to the accompanying drawings.

[0032] Figure 1 It is a flowchart of a V2X resource scheduling method according to an embodiment of the present invention.

[0033] The V2X resource scheduling method can be used on the user equipment side. Specifically, each step shown can be executed by the user equipment, for example, it can be the user equipment that sends V2X data, that is, the user equipment that executes each step shown. Figure 1 The various steps shown, for example, it can be the sending user equipment, that is, the user equipment that sends V2X data, which executes each step shown. Figure 1 The various steps shown.

[0034] As Figure 1 shown, the V2X resource scheduling method may include the following steps:

[0035] Step S101: Receive downlink signaling from the base station, and the downlink signaling can indicate resource selection information;

[0036] Step S102: Determine the direct link transmission resources for at least one direct link at least according to the resource selection information.

[0037] It should be noted that the sequence numbers of the steps in this embodiment do not represent the limitation of the execution sequence of each step.

[0038] It can be understood that in specific implementations, the V2X resource scheduling method can be implemented in the form of a software program, and the software program runs in a processor integrated inside a chip or a chip module. This method can also be implemented in a way that combines software and hardware, and the present application does not make any restrictions.

[0039] The base station (or serving base station) referred to in the present invention means the base station with which the Tx UE establishes an RRC connection. For the Tx UE, it will only receive the downlink signaling of the serving base station. Therefore, the base station in the present invention refers to the serving base station of the Tx UE.

[0040] The user equipment in this embodiment (including the transmitting user equipment and the receiving user equipment) is a user equipment that supports NR V2X services. The receiving user equipment refers to the user equipment that receives V2X data. The same user equipment can be both the transmitting user equipment and the receiving user equipment. For example, when two user equipments perform two-way V2X data transmission, each user equipment is both the transmitting user equipment and the receiving user equipment at this time.

[0041] In a specific scenario, the Tx UE can transmit V2X services to multiple receiving UEs (Rx UEs). For example, at frequency F1: transmit V2X service 1 to UE1, and call the direct link between the Tx UE and UE1 SL1 (i.e., the SL index is SL 1); transmit V2X services 2 and 3 to UE2, and call the direct link between the Tx UE and UE2 SL2; transmit V2X service 4 to UE3, and call the direct link between the Tx UE and UE3 SL3. At frequency F2: transmit V2X service 5 to UE4, and call the direct link between the Tx UE and UE4 SL4. The serving base station can configure the SL index corresponding to the direct link, or the Tx UE can indicate to the serving base station the SL index corresponding to different direct links.

[0042] The Tx UE can measure the link quality of each direct link (i.e., SL1, SL2, SL3, and SL4), or the Rx UE can measure the link quality of each direct link and send it to the Tx UE. The embodiments of the present invention do not limit this.

[0043] The Tx UE can report the link quality of each direct link or part of the direct links to the serving base station. The serving base station can allocate appropriate transmission resources according to the link quality of the direct links currently established by the Tx UE, configure an appropriate modulation and coding scheme (MCS), and then send DCI to the Tx UE to indicate the direct link transmission resources. For the V2X services carried out by the Tx UE to different receiving UEs, all can adopt the mode 1 method, that is, the direct link transmission resources are all scheduled by the serving base station; or part of them can adopt the mode 1 method, and the rest adopt the mode 2 method. For example, the direct link transmission resources on frequency F1 are all scheduled by the serving base station, and the direct link transmission resources on frequency F2 are determined by the UE using the automatic resource selection mode. The Tx UE can determine which direct link transmission resources are scheduled by the serving base station and which direct link transmission resources are determined by the UE's automatic resource selection; or the serving base station specifies which direct link transmission resources are scheduled by the serving base station, and this patent does not limit this. The Tx UE usually only needs to report the link quality of the direct links adopting mode 1.

[0044] In the specific implementation of step S101, the serving base station can send downlink signaling to the user equipment, and the user equipment can receive the downlink signaling, and the downlink signaling can directly or indirectly indicate resource selection information. Specifically, the downlink signaling can be RRC signaling or DCI. The resource selection information can be directly carried in the downlink signaling. For example, the downlink signaling includes the resource selection information; or it can be indirectly carried in the downlink signaling. For example, the radio network temporary identity (RNTI) scrambling the downlink signaling is the resource selection information.

[0045] In the specific implementation, the resource selection information can directly indicate the direct link to which the direct link transmission resources are applicable. For example, the DCI contains scheduling information SL grant1, and the DCI can also indicate the direct link SL1 (that is, the direct link index SLindex). Then the UE can use the direct link transmission resources scheduled by the scheduling information SL grant1 for the direct link SL1.

[0046] In the specific implementation of step S102, the user equipment can determine the direct link transmission resources for the at least one direct link according to the resource selection information, or can combine the resource selection information and the link quality of at least one direct link.

[0047] Specifically, the resource selection information may also indicate the link quality value applicable to the direct link transmission resource. In other words, the resource selection information may indicate the correspondence between the direct link transmission resource and the link quality value. More specifically, the resource selection information may be the link quality value applicable to the direct link transmission resource indicated by the downlink signaling. Thus, the user equipment can determine the direct link transmission resource applicable to the direct link based on the resource selection information and the link quality of the direct link.

[0048] In the embodiments of the present invention, the base station may directly indicate or indirectly indicate the resource selection information through downlink signaling, and the user equipment can determine the resource selection information through the downlink signaling from the base station; the user equipment can determine the direct link transmission resource for the direct link at least according to the resource selection information, thereby avoiding problems such as transmission failures caused by the user equipment independently determining the direct link transmission resource of the direct link, ensuring the appropriateness of the determined transmission resource for the direct link, and further improving the transmission efficiency of V2X.

[0049] In a specific embodiment, the direct link transmission resource may be a semi-static direct link transmission resource or a dynamic direct link transmission resource scheduled by the base station. For a transmitting user equipment in the connected state, the serving base station may configure the semi-static direct link transmission resource for the user equipment through RRC signaling, such as configuring information such as the period, start time slot, and occupied frequency domain resources of the semi-static direct link transmission resource; the serving base station may also schedule the dynamic direct link transmission resource through DCI, and each DCI indicates a direct link transmission resource once; the serving base station may also allocate the semi-static direct link transmission resource for the transmitting user equipment in a combined manner of RRC signaling and DCI, such as configuring the period of the semi-static direct link transmission resource through RRC signaling, and DCI indicating the start time slot and occupied frequency domain resources of the first direct link transmission resource, and then repeating according to the period.

[0050] In a non-limiting embodiment of the present invention, the resource selection information includes modulation and coding parameters corresponding to the direct link transmission resource. Please refer to Figure 2 , Figure 1 shown, step S102 may include the following steps:

[0051] Step S201: Determine the modulation and coding parameters corresponding to each direct link according to the first mapping relationship and the link quality of each direct link, where the first mapping relationship includes multiple link quality values and multiple modulation and coding parameters corresponding to the multiple link quality values;

[0052] Step S202: If there is a modulation and coding parameter corresponding to a direct link that is consistent with the modulation and coding parameter in the resource selection information, then use the direct link transmission resource indicated by the downlink signaling for data transmission of the direct link.

[0053] In this embodiment, the modulation and coding parameters may be MCS. That is, the base station carries MCS in the downlink signaling.

[0054] In a specific embodiment, the modulation and coding parameters may be the modulation and coding order. For example, it may be Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation, 64QAM, etc.

[0055] In specific implementation, the first mapping relationship may be pre-configured by the base station. For example, the base station pre-sends the first mapping relationship to the Tx UE through RRC signaling. Alternatively, the first mapping relationship may be pre-agreed by the communication standard protocol.

[0056] Specifically, reference may be made to Table 1. Table 1 shows the first mapping relationship, and the first mapping relationship includes multiple link quality values and multiple modulation and coding parameters corresponding to the multiple link quality values.

[0057] Table 1

[0058] Link quality value MCS 1 QPSK 2 QPSK 3 QPSK 4 QPSK 5 QPSK 6 QPSK 7 16QAM 8 16QAM 9 16QAM 10 64QAM 11 64QAM 12 64QAM 13 64QAM 14 64QAM 15 64QAM

[0059] Among them, the higher the link quality value, the higher the quality of the direct link.

[0060] It should be noted that the first mapping relationship may also be any other implementable correspondence between the link quality value and MCS, and the embodiments of the present invention do not limit this.

[0061] In a specific embodiment of the present invention, the link quality is represented by the Channel Quality Indicator (CQI).

[0062] In a specific application scenario, the Tx UE determines whether the CQI corresponding to the MCS (the Tx UE can obtain the SL CQI corresponding to the MCS through Lookup Table 1) is consistent with the CQI of the reported direct link based on the CQIs of each reported direct link and the MCS of the direct link transmission resources indicated in the DCI. If they are consistent, the transmission resources are applied to the direct link. Taking the direct link SL1 and the direct link SL2 as examples, if the base station learns that the CQI of SL1 is 7 and the CQI of SL2 is 10, and the base station sends two DCIs to the Tx UE, respectively corresponding to the allocation of direct link transmission resources twice. One DCI indicates that the MCS is 16QAM, and the other DCI indicates that the MCS is 64QAM. After receiving the two DCIs, the Tx UE determines, based on the CQI of each direct link, that SL1 is applicable to the direct link transmission resources corresponding to 16QAM (i.e., applying the direct link transmission resources indicating 16QAM to SL1), and SL2 is applicable to the direct link transmission resources corresponding to 64QAM.

[0063] In a preferred embodiment of the present invention, Figure 1 The step S102 shown may include the following steps: determining a first direct link applicable to the direct link transmission resources indicated by the downlink signaling according to the resource selection information and the link quality of the at least one direct link; if the number of the first direct links applicable to the same direct link transmission resources is multiple, determining a final direct link applicable to the same direct link transmission resources from the multiple first direct links according to the quality of service requirements of the V2X data transmitted by the at least one direct link.

[0064] In this embodiment, different V2X services may have different quality of service requirements (Quality of Service, QoS), or the same quality of service requirements. Specifically, different QoS requirements can be represented by parameters such as priority, transmission delay, and transmission bit error rate. Thus, if the number of the first direct links applicable to the same direct link transmission resources is multiple determined according to the resource selection information and the link quality of the at least one direct link, the final direct link can be determined according to the quality of service requirements of the V2X data transmitted by the at least one direct link.

[0065] In a specific application scenario of an embodiment of the present invention, it is possible that the same MCS can be applied to multiple direct links. At this time, the Tx UE can select one of the multiple direct links for V2X transmission by combining other QoS parameters of the V2X service, such as latency. For example, the CQIs of the direct links SL2 and SL3 both indicate that 64QAM can be used for direct link transmission. When the direct link transmission resource received by the Tx UE uses 64QAM, that is, the DCI indicates the modulation and coding method of 64QAM on this direct link transmission resource, the Tx UE then combines the latency of the V2X data transmitted on the direct links SL2 and SL3 cached in the buffer to determine which one to preferentially select for transmission. If the latency requirement of the data transmitted on the direct link SL2 is more urgent, this transmission resource can be used to transmit the V2X data on the direct link SL2 to avoid its latency exceeding the set threshold.

[0066] In a non-limiting embodiment of the present invention, the resource selection information includes the index of the destination device to which the direct link transmission resource is applied. Please refer to Figure 3 , Figure 1 The step S102 shown can include the following steps:

[0067] Step S301: Determine the destination device according to the second mapping relationship and the index of the destination device. The second mapping relationship includes the indexes of multiple destination devices and their corresponding multiple destination devices;

[0068] Step S302: Determine the direct link associated with the destination device;

[0069] Step S303: Use the direct link transmission resource indicated by the downlink signaling for the associated direct link.

[0070] Since the identifier of the destination device may be very large, for example, 24 bits, indicating it through downlink signaling, such as DCI, will increase the signaling overhead. Therefore, in this embodiment, the base station can indicate the index of the specific destination device in the downlink signaling, such as DCI or RRC signaling.

[0071] For example, the index of UE1 is 00, the index of UE2 is 01, the index of UE3 is 10, and the index of UE4 is 11. In this way, only 2 bits of information need to be indicated in the downlink signaling, saving the signaling overhead.

[0072] In specific implementation, the second mapping relationship may be pre-configured by the base station. For example, the base station pre-sends the second mapping relationship to the Tx UE through RRC signaling. Alternatively, the second mapping relationship may be pre-agreed by the communication standard protocol, such as setting respective indexes in sequence according to the UE identification number. The embodiments of the present invention do not limit this.

[0073] In a non-limiting embodiment of the present invention, the resource selection information includes the direct link index (SL Index) applied to the direct link transmission resource. Figure 1 The step S102 may include the following steps: determining the direct link according to the direct link index and the third mapping relationship, where the third mapping relationship includes a plurality of direct link indexes and their corresponding plurality of direct links; using the direct link transmission resource indicated by the downlink signaling for the determined direct link.

[0074] In this embodiment, the third mapping relationship may be pre-configured by the base station. For example, the base station pre-sends the third mapping relationship to the Tx UE through RRC signaling. Alternatively, the second mapping relationship may be set by the Tx UE and then sent to the base station through RRC signaling.

[0075] For example, the SL index of SL 1 corresponds to the direct link between the Tx UE and UE1 on frequency F1, the SL index of SL2 corresponds to the direct link between the Tx UE and UE2 on frequency F1, and so on.

[0076] In a non-limiting embodiment of the present invention, the resource selection information includes the RNTI used to scramble the downlink signaling. Please refer to Figure 4 , Figure 1 The step S102 may include the following steps:

[0077] Step S401: Decoding the downlink signaling using different RNTIs and determining the first RNTI used to successfully demodulate the downlink signaling;

[0078] Step S402: Determining the destination direct link according to the first RNTI and the corresponding relationship between each RNTI and the direct link;

[0079] Step S403: Using the direct link transmission resource indicated by the downlink signaling for the destination direct link.

[0080] In this embodiment, the serving base station may pre-allocate RNTIs for different destinations to the Tx UE, or allocate RNTIs for different direct link indexes to the Tx UE. The DCI sent by the serving base station is scrambled by the RNTI.

[0081] In a specific application scenario, the DCIs sent by the base station are all scrambled by RNTIs, and different RNTIs can be allocated to different destinations. For example, for the scheduling of direct link transmission resources for UE1 (i.e., direct link SL1), RNTI1 is used for scrambling; for the scheduling of direct link transmission resources for UE2 (i.e., direct link SL2), RNTI2 is used for scrambling; for the scheduling of direct link transmission resources for UE3 (i.e., direct link SL3), RNTI3 is used for scrambling.

[0082] When the Tx UE receives the SL Grant sent by the base station through the DCI, it decodes the DCI with different RNTIs, and then it can know which destination device the direct link transmission resources scheduled by the SL Grant are for, that is, it can determine which direct link the direct link transmission resources scheduled by the SL Grant are for.

[0083] In a non-limiting embodiment of the present invention, the resource selection information includes the application time domain position of the direct link transmission resources. Please refer to Figure 5 , Figure 1 The step S102 shown in the figure may include the following steps:

[0084] Step S501: Determine the general modulation and coding parameters and the link quality of each direct link;

[0085] Step S502: Determine the actual application time domain position of each direct link transmission resource;

[0086] Step S503: If it is determined that the first direct link is applicable to modulation and coding parameters other than the general modulation and coding parameters, then use the direct link transmission resources with the same application time domain position as the application time domain position for the first direct link.

[0087] In this embodiment, the direct link transmission resources applicable to some direct links can be determined. The part of the direct links may refer to the first direct link, that is, the direct link applicable to modulation and coding parameters other than the general modulation and coding parameters. The general modulation and coding parameters refer to the MCS that the direct link adopts by default.

[0088] It can be understood that the general modulation and coding parameters can be configured by the base station for the user equipment, or can be agreed by the communication standard protocol.

[0089] In a specific application scenario of the present invention, the MCS adopted by the direct link by default is 16QAM. If the Tx UE reports that the CQI of the direct link SL0 can adopt 64QAM, the base station configures in advance through RRC signaling the time domain position applied to the transmission resources of SL0 for this UE, specifically, it can be transmission time slot parameters, so that when the Tx UE receives the SL grant, it can apply the direct link transmission resources scheduled by the grant applying the time domain position to the direct link SL0. For example, when the base station learns that the CQI of the direct link SL3 is applicable to 64QAM, the base station instructs the Tx UE through RRC signaling to use the transmission resources with MCS of 64QAM for the direct link SL3, and it is limited to specific transmission time slots. When the Tx UE receives the SL Grant indicated by the DCI sent by the base station, the DCI may indicate the time slot applied by this SL Grant, or there is a pre-set time interval in the protocol between the applied time slot of the SL grant and the time slot where the DCI is located (such as the interval is 1 time slot). The Tx UE can learn the actual time domain position of the transmission resources scheduled by this SL grant, that is, the applied time slot. If this time slot belongs to the specific transmission time slots indicated by the foregoing base station, then the Tx UE determines to use the transmission resources scheduled by this SL grant for the direct link SL3.

[0090] In a non-limiting embodiment of the present invention, please refer to Figure 6 , Figure 1 shown, step S102 may include the following steps:

[0091] Step S601: Determine the common RNTI, common modulation and coding parameters, and the link quality of each direct link;

[0092] Step S602: If it is determined that the second direct link is applicable to modulation and coding parameters other than the common modulation and coding parameters, then use the direct link transmission resources indicated by the downlink signaling demodulated by using an RNTI other than the common RNTI for the second direct link.

[0093] Different from the foregoing embodiment, the embodiment of the present invention determines the direct link transmission resources applicable to some direct links according to the RNTI scrambling the downlink signaling. The some direct links may refer to the second direct link, that is, the direct link applicable to modulation and coding parameters other than the common modulation and coding parameters. The common modulation and coding parameters refer to the MCS adopted by the direct link by default.

[0094] In a specific application scenario of the present invention, the MCS adopted by the direct link by default is 16QAM. The base station learns that the CQI of the direct link SL3 is applicable to 64QAM. The base station uses a special RNTI (SpecialRNTI) for the scheduling of the direct link SL3, while using a common RNTI, such as SL C-RNTI, for the scheduling of other SL grants. At this time, the scheduling information may not indicate the MCS. The Tx UE receives the DCI scrambled by the special RNTI, learns the direct link transmission resources indicated by it, and uses them for the direct link SL3 that can use 64QAM. When the Tx UE receives the DCI scrambled by the SL C-RNTI, learns the direct link transmission resources indicated by it, and can use them for other direct links. Further, the Tx UE can also determine which direct link to use the transmission resources scheduled by the SL grant in combination with the QoS of the V2X service.

[0095] Please refer to Figure 7 , the embodiment of the present invention also discloses a V2X resource scheduling device 70. The V2X resource scheduling device 70 may include a downlink signaling receiving module 701 and a resource scheduling module 702.

[0096] Among them, the downlink signaling receiving module 701 is adapted to receive downlink signaling from the base station, and the downlink signaling can indicate resource selection information; the resource scheduling module 702 is adapted to determine direct link transmission resources for at least one direct link at least according to the resource selection information.

[0097] In the embodiment of the present invention, the base station can directly indicate or indirectly indicate the resource selection information through the downlink signaling, and the user equipment can determine the resource selection information through the downlink signaling from the base station; the user equipment can determine the direct link transmission resources for the direct link at least according to the resource selection information, so as to avoid problems such as transmission failure caused by the user equipment independently determining the direct link transmission resources only by itself, ensure the appropriateness of the transmission resources determined for the direct link, and further improve the transmission efficiency of V2X.

[0098] For more content about the working principle and working mode of the V2X resource scheduling device 70, reference can be made to Figures 1 to 6 the relevant description in, which will not be elaborated here.

[0099] The embodiment of the present invention also discloses a storage medium, on which computer instructions are stored, and the computer instructions can execute Figures 1 to 6 the steps of the method shown in. The storage medium may include ROM, RAM, disk or optical disc, etc. The storage medium may also include non-volatile memory or non-transitory memory, etc.

[0100] An embodiment of the present invention also discloses a user equipment, which may include a memory and a processor, and computer instructions that can run on the processor are stored on the memory. When the processor runs the computer instructions, it can execute Figures 1 to 6 the steps of the method shown in

[0101] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. A V2X resource scheduling method, characterized in that, including: receiving downlink signaling from a base station, the downlink signaling being capable of indicating resource selection information; determining direct link transmission resources for at least one direct link based at least on the resource selection information; the resource selection information includes a direct link index applied to the direct link transmission resources, and the determining direct link transmission resources for at least one direct link based at least on the resource selection information includes: determining a direct link according to the direct link index and a third mapping relationship, the third mapping relationship including a plurality of direct link indexes and their corresponding plurality of direct links; using the direct link transmission resources indicated by the downlink signaling for the determined direct link; determining a first direct link applicable to the direct link transmission resources indicated by the downlink signaling according to the resource selection information and the link quality of the at least one direct link; if the number of the first direct links applicable to the same direct link transmission resources is multiple, determining a final direct link applicable to the same direct link transmission resources from the multiple first direct links according to the quality of service requirements of the V2X data transmitted by the at least one direct link.

2. The V2X resource scheduling method according to claim 1, wherein the resource selection information includes an index of a destination device to which the direct link transmission resources are applied, and the determining direct link transmission resources for at least one direct link based at least on the resource selection information includes: determining a destination device according to a second mapping relationship and the index of the destination device, the second mapping relationship including a plurality of destination device indexes and their corresponding plurality of destination devices; determining a direct link associated with the destination device; using the direct link transmission resources indicated by the downlink signaling for the associated direct link.

3. The V2X resource scheduling method according to claim 1, wherein the resource selection information includes an RNTI used for scrambling the downlink signaling, and the determining direct link transmission resources for at least one direct link based at least on the resource selection information includes: decoding the downlink signaling using different RNTIs and determining a first RNTI used for successfully demodulating the downlink signaling; determining a destination direct link according to the first RNTI and the corresponding relationship between each RNTI and a direct link; using the direct link transmission resources indicated by the downlink signaling for the destination direct link.

4. The V2X resource scheduling method according to claim 1, wherein the resource selection information includes the application time domain position of the direct link transmission resources, and the determining direct link transmission resources for at least one direct link based at least on the resource selection information includes: determining general modulation and coding parameters and the link quality of each direct link; determining the actual application time domain position of each direct link transmission resource; if it is determined that a first direct link is applicable to modulation and coding parameters other than the general modulation and coding parameters, using the direct link transmission resources with the actual application time domain position consistent with the application time domain position for the first direct link.

5. The V2X resource scheduling method according to claim 1, wherein the determining direct link transmission resources for at least one direct link based at least on the resource selection information includes: determining a general RNTI, general modulation and coding parameters, and the link quality of each direct link; If it is determined that the second direct link applies modulation and coding parameters other than the general modulation and coding parameters, the direct link transmission resources indicated by the downlink signaling demodulated using an RNTI other than the general RNTI are used for the second direct link.

6. The V2X resource scheduling method according to claim 1, wherein The direct link transmission resources are semi-static direct link transmission resources or dynamic direct link transmission resources scheduled by the serving base station.

7. A V2X resource scheduling device, characterized in that, Including: A downlink signaling receiving module, adapted to receive downlink signaling from a base station, the downlink signaling being capable of indicating resource selection information; A resource scheduling module, adapted to determine direct link transmission resources for at least one direct link at least according to the resource selection information; The resource selection information includes a direct link index applied to the direct link transmission resources. The resource scheduling module determines a direct link according to the direct link index and a third mapping relationship, the third mapping relationship including a plurality of direct link indexes and their corresponding plurality of direct links; and uses the direct link transmission resources indicated by the downlink signaling for the determined direct link; The resource scheduling module determines a first direct link applicable to the direct link transmission resources indicated by the downlink signaling according to the resource selection information and the link quality of the at least one direct link; If the number of the first direct links applicable to the same direct link transmission resources is multiple, the resource scheduling module determines a final direct link applicable to the same direct link transmission resources from the multiple first direct links according to the quality of service requirements of the V2X data transmitted by the at least one direct link.

8. A storage medium having computer instructions stored thereon, characterized in that, When the computer instructions are run by a processor, the steps of the V2X resource scheduling method according to any one of claims 1 to 6 are executed.

9. A user equipment, comprising a memory and a processor, wherein computer instructions capable of running on the processor are stored on the memory, and characterized in that, When the processor runs the computer instructions, the steps of the V2X resource scheduling method according to any one of claims 1 to 6 are executed.

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