CN115442766A - V2X resource scheduling method and device, storage medium, user equipment - Google Patents

Abstract

A method and a device for scheduling V2X resources, a storage medium and user equipment are provided, wherein the method for scheduling the V2X resources comprises the following steps: receiving a downlink signaling from a base station, wherein the downlink signaling can indicate resource selection information; direct link transmission resources for at least one direct link are determined based at least on the resource selection information. The technical scheme of the invention can improve the utilization efficiency of V2X scheduling resources so as to improve the V2X transmission efficiency.

Description

V2X resource scheduling method and device, storage medium, user equipment

technical field

The present invention relates to the field of communication technologies, and in particular to a V2X resource scheduling method and device, a storage medium, and user equipment.

Background technique

In the communication standard protocol version 12 (Release 12), the Long Term Evolution (Long Term Evolution, LTE) system introduces direct communication (Direct Communication). Multiple user equipments (User Equipment, UEs) can communicate directly through the PC5 interface. The PC5 interface is a direct interface between UEs. There are two modes of resource allocation in the prior art, one is scheduled resource allocation, which is configured by the base station through dedicated signaling; the other is automatic resource selection (autonomous resource selection), the base station A resource pool for direct communication may be provided to the UE through system messages or radio resource control (Radio Resource Control, RRC) signaling, and the UE selects resources for direct communication from the resource pool. If the transmitting UE (Transmitter UE) is not within the coverage of the network, the UE selects resources for direct communication from a pre-configured resource pool in an automatic resource selection manner.

In the prior art, based on direct communication, the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) also supports Vehicle-to-Everything (V2X). The 3GPP is studying the introduction of V2X into a new radio (New Radio, NR) system. Because the 5G system can provide greater bandwidth and lower latency, it can better meet the business needs of V2X.

In NR V2X, the resource allocation method in LTE is basically continued, such as the introduction of mode 1 (mode1): the base station schedules transmission resources for V2X data for UE; mode 2 (mode 2): UE determines the transmission resources of V2X data , the UE selects a transmission resource based on a resource pool configured by the network or a preconfigured resource pool. When the UE needs to adopt mode 1, the UE needs to be in the RRC connection state, and the base station can schedule transmission resources for V2X data for the UE through RRC signaling or downlink control signaling (Downlink Control Information, DCI). After receiving the scheduling resources, the UE , sending V2X data to the Rx UE (Receive UE, receiving UE) through the PC5 interface in the time slot where the scheduling resource is applicable. In Mode 1, a Tx UE may transmit V2X data to multiple UEs at the same time. At this time, the Tx UE and multiple UEs simultaneously establish unicast channels of direct links. 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 channel conditions of different direct links.

However, in mode 1, for the transmission resource for V2X data scheduled by the base station for the UE, the UE independently decides the receiving UE (that is, the Rx UE) for resource application, which may cause the Tx UE to apply inappropriate transmission resources to a receiving UE. UE, causing transmission failure.

Contents of the invention

The technical problem solved by the present invention is how to improve the utilization efficiency of V2X scheduling resources, so as to improve the V2X transmission efficiency.

In order to solve the above technical problems, an embodiment of the present invention provides a V2X resource scheduling method, the V2X resource scheduling method includes: receiving downlink signaling from a base station, the downlink signaling can indicate resource selection information; at least according to the resource selection information Direct link transmission resources for at least one direct link are determined.

Optionally, the resource selection information includes modulation and coding parameters corresponding to direct link transmission resources, and determining the direct link transmission resource for at least one direct link according to the resource selection information includes: according to the first mapping relationship And the link quality of each direct link determines the modulation and coding parameters corresponding to each direct link, the first mapping relationship includes multiple link quality values and multiple modulation and coding parameters corresponding to the multiple link quality values ; if there is a modulation and coding parameter corresponding to the direct link that is consistent with the modulation and coding parameter in the resource selection information, use the direct link transmission resource indicated by the downlink signaling for the data transmission of the direct link.

Optionally, the modulation and coding parameter is a modulation and coding order.

Optionally, the resource selection information includes an index of a destination device to which the direct link transmission resource is applied, and determining the direct link transmission resource for at least one direct link according to the resource selection information includes: according to the second The mapping relationship and the index of the destination device determine the destination device, and the second mapping relationship includes multiple destination device indexes and corresponding multiple destination devices; determining a direct link associated with the destination device; The direct link transmission resource indicated by the downlink signaling is used for the associated direct link.

Optionally, the resource selection information includes the RNTI used for scrambling the downlink signaling, and the determining the direct link transmission resources for at least one direct link according to the resource selection information includes: using different RNTIs Decoding the downlink signaling, and determining the first RNTI used to successfully demodulate the downlink signaling; determining the destination direct link according to the first RNTI and the correspondence between each RNTI and the direct link; The direct link transmission resource indicated by the signaling is used for the target direct link.

Optionally, the resource selection information includes the application time domain position of the direct link transmission resource, and the determining the direct link transmission resource for at least one direct link according to the resource selection information includes: determining a general modulation and coding parameter And the link quality of each direct link; determine the actual application time domain position of each direct link transmission resource; if it is determined that the first direct link is applicable to modulation and coding parameters other than the general modulation and coding parameters, the actual application A direct link transmission resource whose time domain position is consistent with the application time domain position is used for the first direct link.

Optionally, the determining the direct link transmission resource for at least one direct link according to the resource selection information includes: determining a general RNTI, a general modulation and coding parameter, and link quality of each direct link; if the second If the direct link is applicable to modulation and coding parameters other than the general modulation and coding parameters, the direct link transmission resources indicated by the downlink signaling obtained by demodulating other RNTIs than the general RNTI are used for the second direct link link.

Optionally, the determining at least one direct link transmission resource for at least one direct link according to the resource selection information includes: determining the applicable resource according to the resource selection information and the link quality of the at least one direct link. The first direct link of the direct link transmission resource indicated by the downlink signaling; if the number of the first direct link applicable to the same direct link transmission resource is multiple, according to the at least one direct link The QoS requirement of the transmitted V2X data is to determine the final direct link applicable to the transmission resource of the same direct link from the plurality of first direct links.

Optionally, the direct link transmission resources are semi-static direct link transmission resources or dynamic direct link transmission resources scheduled by the serving base station.

In order to solve the above technical problems, the embodiment of the present invention also discloses a V2X resource scheduling device. The V2X resource scheduling device includes: a downlink signaling receiving module, adapted to receive downlink signaling from a base station, and the downlink signaling can indicate resource selection information; a resource scheduling module adapted to determine direct link transmission resources for at least one direct link based at least on said resource selection information.

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

The embodiment of the present invention also discloses a user equipment, including a memory and a processor, the memory stores computer instructions that can run on the processor, and the processor executes the V2X when running the computer instructions. The steps of the resource scheduling method.

Compared with the prior art, the technical solutions of the embodiments of the present invention have the following beneficial effects:

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 direct link transmission resources 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 or indirectly indicate resource selection information through downlink signaling, and the user equipment can determine resource selection information through downlink signaling from the base station; the user equipment can determine the resource selection information based on at least the resource selection information The direct link transmission resource of the direct link, so as to avoid the transmission failure caused by only the direct link transmission resource of the direct link being independently determined by the user equipment, and ensure the suitability of the transmission resource determination for the direct link, thereby improving V2X transmission efficiency.

Further, the resource selection information includes modulation and coding parameters corresponding to the direct link transmission resources, or the resource selection information includes an index of the destination device to which the direct link transmission resources are applied, or the resource selection information includes scrambling The RNTI used in 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 selection information includes the RNTI used for scrambling 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 drawings

FIG. 1 is a flowchart of a V2X resource scheduling method according to an embodiment of the present invention;

FIG. 2 is a flowchart of a specific implementation of step S102 shown in FIG. 1;

FIG. 3 is a flow chart of another specific embodiment of step S102 shown in FIG. 1;

FIG. 4 is a flow chart of another specific embodiment of step S102 shown in FIG. 1;

FIG. 5 is a flow chart of yet another specific embodiment of step S102 shown in FIG. 1;

FIG. 6 is a flow chart of yet another specific embodiment of step S102 shown in FIG. 1;

Fig. 7 is a schematic structural diagram of a V2X resource scheduling device according to an embodiment of the present invention.

detailed description

As mentioned in the background, in NR V2X mode 1, for the transmission resource for V2X data scheduled by the serving base station for the UE, the UE independently decides the receiving UE (ie Rx UE) for the resource application, which may cause the Tx UE to be unsuitable The transmission resource of is applied to a certain receiving UE, causing transmission failure.

In the technical solution of the present invention, the base station can directly or indirectly indicate resource selection information through downlink signaling, and the user equipment can determine resource selection information through downlink signaling from the base station; the user equipment can determine the resource selection information based on at least the resource selection information The direct link transmission resource of the direct link, so as to avoid the transmission failure caused by only the direct link transmission resource of the direct link being independently determined by the user equipment, and ensure the suitability of the transmission resource determination for the direct link, thereby improving V2X transmission efficiency.

In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

FIG. 1 is a flowchart of a V2X resource scheduling method according to an embodiment of the present invention.

The V2X resource scheduling method can be used on the user equipment side. Specifically, the various steps shown in FIG. 1 may be performed by the user equipment, for example, the sending user equipment, that is, the user equipment that sends V2X data may perform the various steps shown in FIG. 1 .

As shown in Figure 1, the V2X resource scheduling method may include the following steps:

Step S101: receiving downlink signaling from the base station, where the downlink signaling can indicate resource selection information;

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

It should be noted that the sequence numbers of the steps in this embodiment do not represent a limitation on the execution order of the steps.

It can be understood that, in a specific implementation, the V2X resource scheduling method may be implemented in the form of a software program, and the software program runs in a processor integrated in a chip or a chip module. The method may also be implemented by combining software with hardware, which is not limited in this application.

The base station (or serving base station) in the present invention refers to 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, so the base station in the present invention refers to the Tx UE's service base.

The user equipment (including sending user equipment and receiving user equipment) in this embodiment is a user equipment supporting NR V2X services. The receiving user equipment refers to a user equipment that receives V2X data. The same user equipment can be both a sending user equipment and a receiving user equipment. For example, two user equipments perform two-way V2X data transmission. At this time, each user equipment is both a sending user equipment and a receiving user equipment.

In a specific scenario, the Tx UE can transmit V2X services (V2Xservice) to multiple receiving UEs (Rx UEs), for example, on frequency F1: transmit V2X service 1 to UE1, and connect the direct link between Tx UE and UE1 It is called SL1 (that is, the SL index is SL 1); transmit V2X service 2 and service 3 to UE2, and call the direct link between Tx UE and UE2 SL2; transmit V2Xservice 4 to UE3, and link Tx between UE and UE3 The direct link is called SL3. On frequency F2: V2X service 5 is transmitted to UE4, and the direct link between Tx UE and UE4 is called SL4. The serving base station may configure the SL index corresponding to the direct link, or the Tx UE may indicate to the serving base station the SL index corresponding to different direct links.

The Tx UE can measure the link quality of each direct link (that is, 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. This is not limited.

The Tx UE may report the link quality of each direct link or part of direct links to the serving base station. The serving base station can allocate appropriate transmission resources according to the link quality of the direct link currently established by the Tx UE, configure an appropriate modulation and coding scheme (Modulation and Coding Scheme, MCS), and then send DCI to indicate the direct link transmission resources to the Tx UE . The V2X services carried out by the Tx UE to different receiving UEs can all adopt the mode 1 method, that is, the direct link transmission resources are all scheduled by the serving base station; or the mode 1 method can be used partly, and the mode 2 method is used for the rest. All direct link transmission resources on frequency F1 are scheduled by the serving base station, and all direct link transmission resources on frequency F2 are determined by the UE in an automatic resource selection mode. Tx UE can determine which direct link transmission resources are scheduled by the serving base station, which direct link transmission resources are determined by UE automatic resource selection; or which direct link transmission resources are designated by the serving base station to be scheduled by the serving base station. This patent There is no limit to this. Tx UE usually only needs to report the link quality of the direct link using mode 1.

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, which can directly or indirectly indicate resource selection information. Specifically, the downlink signaling may be RRC signaling or DCI. The resource selection information may be carried directly in the downlink signaling, for example, the downlink signaling includes the resource selection information; it may also be carried indirectly in the downlink signaling, for example, the wireless network temporarily scrambling the downlink signaling The Radio Network Temporary Identity (RNTI) is resource selection information.

In a specific implementation, the resource selection information may directly indicate the direct link to which the direct link transmission resource is applicable. For example, the DCI contains the scheduling information SL grant1, and the DCI may 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 .

In the specific implementation of step S102, the user equipment may determine the direct link transmission resource for the at least one direct link according to the resource selection information, or in combination with the resource selection information and the link quality of the at least one direct link .

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 a link quality value applicable to the direct link transmission resources indicated by the downlink signaling. Thus, the user equipment can determine the direct link transmission resources applicable to the direct link through the resource selection information and the link quality of the direct link.

In this embodiment of the present invention, the base station may directly or indirectly indicate resource selection information through downlink signaling, and the user equipment may determine resource selection information through downlink signaling from the base station; the user equipment may determine the resource selection information based on at least the resource selection information. The direct link transmission resource of the direct link, so as to avoid the transmission failure caused by only the direct link transmission resource of the direct link being independently determined by the user equipment, and ensure the suitability of the transmission resource determination for the direct link, thereby improving V2X transmission efficiency.

In a specific embodiment, the direct link transmission resources may be semi-static direct link transmission resources or dynamic direct link transmission resources scheduled by the base station. For the transmission user equipment in the connected state, the serving base station can configure semi-static direct link transmission resources for the user equipment through RRC signaling, such as configuring the period of the semi-static direct link transmission resources, the starting time slot, and the occupied frequency Domain resources and other information; the serving base station can also schedule dynamic direct link transmission resources through DCI, and each DCI indicates a direct link transmission resource; the serving base station can also allocate half of the transmission user equipment through the combination of RRC signaling and DCI Static direct link transmission resources, such as the cycle of semi-static direct link transmission resources configured by RRC signaling, DCI indicates the starting time slot of the first direct link transmission resources and the occupied frequency domain resources, and then repeats according to the cycle.

In a non-limiting embodiment of the present invention, the resource selection information includes modulation and coding parameters corresponding to direct link transmission resources. Referring to FIG. 2, step S102 shown in FIG. 1 may include the following steps:

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 a plurality of link quality values and links with the plurality of link quality values A plurality of modulation and encoding parameters corresponding to the value;

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

The modulation and coding parameters referred to in this embodiment may be MCS. That is to say, the base station bears the MCS in downlink signaling.

In a specific embodiment, the modulation and coding parameter may be a modulation and coding order, for example, it may represent quadrature phase shift keying (Quadrature Phase Shift Keying, QPSK), 16 quadrature amplitude modulation (Quadrature Amplitude Modulation), 64QAM Wait.

In a specific implementation, the first mapping relationship may be pre-configured by the base station, for example, the base station sends the first mapping relationship to the Tx UE in advance through RRC signaling. Alternatively, the first mapping relationship may be pre-agreed by a communication standard protocol.

For details, refer to Table 1. Table 1 shows a first mapping relationship, where the first mapping relationship includes multiple link quality values and multiple modulation and coding parameters corresponding to the multiple link quality values.

Table 1

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

Wherein, a higher link quality value indicates a higher quality of the direct link.

It should be noted that the first mapping relationship may also be any other practicable correspondence relationship between the link quality value and the MCS, which is not limited in this embodiment of the present invention.

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

In a specific application scenario, the Tx UE determines the CQI corresponding to the MCS according to the CQI of each direct link reported by it and the MCS used by the direct link transmission resources indicated in the DCI (the Tx UE can obtain by looking up Table 1 Whether the SL CQI corresponding to the MCS is consistent with the reported CQI of the direct link, and if they are consistent, the transmission resource is applied to the direct link. Taking direct link SL1 and direct link SL2 as an example, if the base station learns that the CQI of SL1 is 7 and the CQI of SL2 is 10, the base station sends two DCIs to the Tx UE, corresponding to two allocations of direct link transmission resources, where One DCI indicates that the MCS is 16QAM and the other DCI indicates that the MCS is 64QAM. After the Tx UE receives two DCIs, it determines that SL1 is applicable to the direct link transmission resource corresponding to 16QAM according to the CQI of each direct link (that is, the direct link transmission resource indicating 16QAM is applied to SL1), and SL2 is applicable to the corresponding direct link transmission resource of 64QAM. direct link transmission resources.

In a preferred embodiment of the present invention, step S102 shown in FIG. 1 may include the following steps: determine the direct link transmission indicated by the downlink signaling according to the resource selection information and the link quality of the at least one direct link The first direct link of the resource; if the number of the first direct link applicable to the same direct link transmission resource is multiple, according to the quality of service requirement of the V2X data transmitted by the at least one direct link, A final direct link applicable to the same direct link transmission resource is determined from the plurality of first direct links.

In this embodiment, different V2X services may have different service quality requirements (Quality of Service, QoS), or have the same service quality requirements. Specifically, different QoS requirements can be represented by parameters such as priority, transmission delay, and transmission bit error rate. Therefore, if it is determined according to the resource selection information and the link quality of the at least one direct link that there are multiple first direct links applicable to the same direct link transmission resource, then the at least one The quality of service requirements for the V2X data transmitted by the direct link determine the final direct link.

In a specific application scenario of the embodiment of the present invention, the same MCS may be applied to multiple direct links. At this time, the Tx UE can combine other QoS parameters of the V2X service, such as delay, etc., from multiple direct links. Choose one for V2X transmission. 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 TxUE uses 64QAM, that is, the DCI indicates that 64QAM is applied to the direct link transmission resource. In the modulation and coding mode, the Tx UE combines the cached (buffer) V2X data delays transmitted on the direct links SL2 and SL3 to determine which one is preferred for transmission. If the delay of the data transmitted on the direct link SL2 requires a higher If it is urgent, the transmission resource can be used to transmit the V2X data on the direct link SL2, so as to avoid its delay exceeding the set threshold.

In a non-limiting embodiment of the present invention, the resource selection information includes an index of a destination device to which the direct link transmission resource is applied. Referring to FIG. 3, step S102 shown in FIG. 1 may include the following steps:

Step S301: Determine the destination device according to the second mapping relationship and the index of the destination device, the second mapping relationship includes multiple destination device indexes and corresponding multiple destination devices;

Step S302: Determine a direct link associated with the destination device;

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

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

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 downlink signaling, which saves signaling overhead.

In a specific implementation, the second mapping relationship may be preconfigured by the base station, for example, the base station sends the second mapping relationship to the Tx UE in advance through RRC signaling. Alternatively, the second mapping relationship may be pre-agreed by a communication standard protocol, such as setting respective indexes in sequence according to UE identification numbers, which is not limited in this embodiment of the present invention.

In a non-limiting embodiment of the present invention, the resource selection information includes a direct link index (SL Index) applied to direct link transmission resources, and step S102 shown in FIG. 1 may include the following steps: according to the direct link A direct link is determined by a road index and a third mapping relationship, where the third mapping relationship includes multiple direct link indexes and multiple direct links corresponding thereto; using the direct link transmission resources indicated by the downlink signaling for The identified direct link.

In this embodiment, the third mapping relationship may be preconfigured by the base station, for example, the base station sends the third mapping relationship to the Tx UE in advance 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.

For example, SL index is the direct link between Tx UE and UE1 on frequency F1 corresponding to SL 1, and SL index is the direct link between Tx UE and UE2 on frequency F1 corresponding to SL2, etc.

In a non-limiting embodiment of the present invention, the resource selection information includes the RNTI used for scrambling the downlink signaling, please refer to FIG. 4, step S102 shown in FIG. 1 may include the following steps:

Step S401: Decode the downlink signaling by using different RNTIs, and determine the first RNTI used to successfully demodulate the downlink signaling;

Step S402: Determine the destination direct link according to the first RNTI and the corresponding relationship between each RNTI and the direct link;

Step S403: Use the direct link transmission resource indicated by the downlink signaling for the target direct link.

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 all scrambled by the RNTI.

In a specific application scenario, the DCI sent by the base station is scrambled by the RNTI, and different RNTIs can be assigned to different destinations. For example, RNTI1 scrambling is used for the scheduling of direct link transmission resources (that is, SL Grant) of UE1 (that is, direct link SL1); the scheduling of direct link transmission resources for UE2 (that is, direct link SL2) uses RNTI2 scrambling; RNTI3 scrambling is used for scheduling the direct link transmission resources of UE3 (that is, the direct link SL3).

When the Tx UE receives the SL Grant issued by the base station through the DCI, it uses different RNTIs to decode the DCI, and then it can know which destination device the direct link transmission resources scheduled by the SL Grant are used for, that is, it can determine the For which direct link the scheduled direct link transmission resources are used.

In a non-limiting embodiment of the present invention, the resource selection information includes the application time domain position of the direct link transmission resource, please refer to FIG. 5, step S102 shown in FIG. 1 may include the following steps:

Step S501: Determine general modulation and coding parameters and link quality of each direct link;

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

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, use the direct link transmission resource whose actual application time domain position is consistent with the application time domain position for the First direct link.

In this embodiment, direct link transmission resources applicable to some direct links may be determined. The partial direct link may refer to a first direct link, that is, a direct link to which modulation and coding parameters other than the general modulation and coding parameters are applicable. The general modulation and coding parameters refer to the default MCS adopted by the direct link.

It can be understood that the general modulation and coding parameters may be configured by the base station to the user equipment, or may be stipulated by a communication standard protocol.

In a specific application scenario of the present invention, the default MCS adopted by the direct link is 16QAM. If the Tx UE reports the direct link SL0 can use 64QAM CQI, the base station configures the time domain position for the UE through RRC signaling in advance, which can be the transmission time slot parameter, so that the Tx UE can receive the SL grant In this case, the direct link transmission resource scheduled by applying the grant of the time domain position can be applied to the direct link SL0. For example, the base station knows that the CQI of the direct link SL3 is applicable to 64QAM, and the base station instructs the Tx UE to use the transmission resource with the MCS of 64QAM for the direct link SL3 through RRC signaling, and only in a specific transmission time slot. The Tx UE receives the SL Grant indicated by the DCI issued by the base station. The DCI may indicate the time slot to which the SL Grant is applied, or there is a protocol-preset time interval between the time slot for which the SL Grant is applied and the time slot where the DCI is located (such as interval is 1 time slot), the Tx UE can know the actual application time domain position of the transmission resource scheduled by the SL grant, that is, the applied time slot, if the time slot belongs to the specific transmission time slot indicated by the aforementioned base station, then Tx The UE determines to use the transmission resource scheduled by the SLgrant for the direct link SL3.

In a non-limiting embodiment of the present invention, please refer to FIG. 6, step S102 shown in FIG. 1 may include the following steps:

Step S601: Determine the general RNTI, general modulation and coding parameters and the link quality of each direct link;

Step S602: If it is determined that the second direct link is applicable to modulation and coding parameters other than the general modulation and coding parameters, use the direct link transmission resources indicated by the downlink signaling obtained by demodulating other RNTIs except the general RNTI for the second direct link.

Different from the foregoing embodiments, in the embodiment of the present invention, the direct link transmission resources applicable to some direct links are determined according to the RNTI of the scrambled downlink signaling. The partial direct link may refer to a second direct link, that is, a direct link to which modulation and coding parameters other than the general modulation and coding parameters are applicable. The general modulation and coding parameters refer to the default MCS adopted by the direct link.

In a specific application scenario of the present invention, the default MCS adopted by the direct link is 16QAM. The base station knows that the CQI of the direct link SL3 is applicable to 64QAM, and the base station uses a special RNTI (Special RNTI) for the scheduling of the direct link SL3, and uses a general 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 resource indicated by it, and uses it for the direct link SL3 that can use 64QAM. When the Tx UE receives the DCI scrambled by the SL C-RNTI, it knows the direct link transmission resource indicated by it, and can use it for other direct links. Furthermore, the Tx UE may also determine which direct link to use the transmission resource scheduled by the SLgrant in conjunction with the QoS of the V2X service.

Referring to FIG. 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 .

Wherein, the downlink signaling receiving module 701 is adapted to receive downlink signaling from the base station, the downlink signaling can indicate resource selection information; the resource scheduling module 702 is adapted to determine at least one direct link direct link transmission resources.

In this embodiment of the present invention, the base station may directly or indirectly indicate resource selection information through downlink signaling, and the user equipment may determine resource selection information through downlink signaling from the base station; the user equipment may determine the resource selection information based on at least the resource selection information. The direct link transmission resource of the direct link, so as to avoid the transmission failure caused by only the direct link transmission resource of the direct link being independently determined by the user equipment, and ensure the suitability of the transmission resource determination for the direct link, thereby improving Transmission efficiency of V2X.

For more details about the working principle and working mode of the V2X resource scheduling device 70 , reference may be made to the related descriptions in FIG. 1 to FIG. 6 , which will not be repeated here.

The embodiment of the present invention also discloses a storage medium on which computer instructions are stored, and the steps of the methods shown in FIGS. 1 to 6 can be executed when the computer instructions are run. The storage medium may include ROM, RAM, magnetic or optical disks, and the like. The storage medium may also include a non-volatile memory (non-volatile) or a non-transitory (non-transitory) memory, and the like.

The embodiment of the present invention also discloses a user equipment. The user equipment may include a memory and a processor, and the memory stores computer instructions operable on the processor. The processor may execute the steps of the methods shown in FIG. 1 to FIG. 6 when executing the computer instructions. The user equipment includes but is not limited to user equipment such as mobile phones, computers, and tablet computers.

Although the present invention is disclosed 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, so the protection scope of the present invention should be based on the scope defined in the claims.

Claims (10)

1. A method for scheduling V2X resources, comprising:

receiving a downlink signaling from a base station, wherein the downlink signaling can indicate resource selection information;

determining direct link transmission resources for at least one direct link at least according to the resource selection information;

the resource selection information comprises a direct link index to which direct link transmission resources are applied, and the determining direct link transmission resources for at least one direct link according to at least the resource selection information comprises:

determining a direct link according to the direct link index and a third mapping relation, wherein the third mapping relation comprises a plurality of direct link indexes and a plurality of direct links corresponding to the direct link indexes;

and using the direct link transmission resource indicated by the downlink signaling for the determined direct link.

2. The V2X resource scheduling method of claim 1, wherein the resource selection information comprises an index of a destination device to which direct link transmission resources are applied, and wherein the determining direct link transmission resources for at least one direct link according to at least the resource selection information comprises:

determining target equipment according to a second mapping relation and the index of the target equipment, wherein the second mapping relation comprises the indexes of a plurality of target equipment and a plurality of corresponding target equipment;

determining a direct link associated with the destination device;

and using the direct link transmission resource indicated by the downlink signaling for the associated direct link.

3. The V2X resource scheduling method of claim 1, wherein the resource selection information includes an RNTI employed for scrambling the downlink signaling, and wherein the determining the direct link transmission resource for the at least one direct link according to at least the resource selection information comprises:

decoding the downlink signaling by adopting different RNTIs, and determining a first RNTI adopted for successfully demodulating the downlink signaling;

determining a target direct link according to the first RNTI and the corresponding relation between each RNTI and the direct link;

and using the direct link transmission resource indicated by the downlink signaling for the target direct link.

4. The V2X resource scheduling method of claim 1, wherein the resource selection information includes an application time domain location of direct link transmission resources, and wherein the determining direct link transmission resources for at least one direct link according to at least the resource selection information comprises:

determining general modulation coding parameters and link quality of each direct link;

determining the actual application time domain position of each direct link transmission resource;

and if the first direct link is determined to be suitable for the modulation coding parameters except the general modulation coding parameters, using the direct link transmission resources with the actual application time domain positions consistent with the application time domain positions for the first direct link.

5. The V2X resource scheduling method of claim 1, wherein said determining direct link transmission resources for at least one direct link based at least on said resource selection information comprises:

determining a universal RNTI, universal modulation coding parameters and link quality of each direct link;

and if the second direct link is determined to be suitable for the modulation coding parameters except the universal modulation coding parameters, using the direct link transmission resources indicated by the downlink signaling obtained by demodulating the RNTIs except the universal RNTI for the second direct link.

6. The V2X resource scheduling method of claim 1, wherein said determining direct link transmission resources for at least one direct link based at least on said resource selection information comprises:

determining a first direct link of the direct link transmission resource suitable for the downlink signaling indication according to the resource selection information and the link quality of the at least one direct link;

and 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 multiple first direct links according to the service quality requirement of the V2X data transmitted by the at least one direct link.

7. The V2X resource scheduling method of claim 1, wherein 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.

8. A V2X resource scheduling apparatus, comprising:

a downlink signaling receiving module, adapted to receive a downlink signaling from a base station, where the downlink signaling can indicate 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 comprises a direct link index applied by direct link transmission resources, the resource scheduling module determines a direct link according to the direct link index and a third mapping relation, and the third mapping relation comprises a plurality of direct link indexes and a plurality of direct links corresponding to the direct link indexes; and using the direct link transmission resource indicated by the downlink signaling for the determined direct link.

9. A storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the V2X resource scheduling method of any of claims 1 to 7.

10. A user equipment comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor when executing the computer instructions performs the steps of the V2X resource scheduling method of any of claims 1 to 7.

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