V2x resource scheduling method and device, storage medium, and user equipment

Abstract

A V2X resource scheduling method, apparatus, storage medium, and user equipment are disclosed. The V2X resource scheduling method includes: receiving downlink signaling from a base station, the downlink signaling indicating resource selection information; and determining, based on the resource selection information, direct link transmission resources for at least one direct link. This invention improves the utilization efficiency of V2X scheduling resources, thereby enhancing V2X transmission efficiency.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a V2X resource scheduling method and apparatus, storage medium, and user equipment. Background Technology

[0002] In Release 12 of the communication standard protocol, the Long Term Evolution (LTE) system introduced Direct Communication. Multiple User Equipment (UEs) can communicate directly through the PC5 interface, which serves as the direct interface between UEs. Existing technologies employ two resource allocation methods: scheduled resource allocation, configured by the base station via dedicated signaling; and automatic resource selection, where the base station provides a resource pool for direct communication to the UE via system messages or Radio Resource Control (RRC) signaling, and the UE selects resources from this pool. If the transmitting UE is outside network coverage, the UE uses automatic resource selection to choose resources for direct communication from the pre-configured resource pool.

[0003] In existing technologies, the 3rd Generation Partnership Project (3GPP) also supports Vehicle-to-Everything (V2X) based on direct communication. 3GPP is also researching the introduction of V2X into New Radio (NR) systems. This is because 5G systems can provide greater bandwidth and lower latency, better meeting the service requirements of V2X.

[0004] In NR V2X, the resource allocation method is largely continued from LTE, such as the introduction of Mode 1: the base station schedules transmission resources for V2X data for the UE; Mode 2: the UE determines the transmission resources for V2X data, selecting transmission resources based on the network-configured resource pool or a pre-configured resource pool. When a UE needs to use Mode 1, the UE needs to be in RRC connection state. The base station can schedule transmission resources for V2X data for the UE through RRC signaling or 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 applicable time slot. In Mode 1, a Tx UE may transmit V2X data to multiple UEs simultaneously. In this case, the Tx UE establishes direct link unicast channels with multiple UEs simultaneously. 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 for V2X data scheduled by the base station for the UE, the receiving UE (i.e., Rx UE) that the UE decides to apply the resources autonomously may cause the Tx UE to apply inappropriate transmission resources to a receiving UE, resulting in transmission failure. Summary of the Invention

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

[0007] To address the aforementioned technical problems, embodiments of the present invention provide a V2X resource scheduling method, the V2X resource scheduling method comprising: receiving downlink signaling from a base station, the downlink signaling being capable of indicating resource selection information; and determining, at least based on the resource selection information, direct link transmission resources for at least one direct link.

[0008] Optionally, the resource selection information includes modulation and coding parameters corresponding to direct link transmission resources. Determining direct link transmission resources for at least one direct link based on the resource selection information includes: determining modulation and coding parameters corresponding to each direct link based on a first mapping relationship and the link quality of 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 direct link whose modulation and coding parameters are consistent with the modulation and coding parameters in the resource selection information, then the direct link transmission resources indicated by the downlink signaling are used for data transmission on the direct link.

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

[0010] Optionally, the resource selection information includes an index of the destination device to which the direct link transmission resource is applied, and determining the direct link transmission resource for at least one direct link based on the resource selection information includes: determining the destination device based on a second mapping relationship and the index of the destination device, wherein 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 to scramble the downlink signaling, and determining the direct link transmission resources for at least one direct link based on the resource selection information includes: decoding the downlink signaling using different RNTIs and determining the first RNTI used to successfully demodulate the downlink signaling; determining the destination direct link based on the first RNTI and the correspondence between each RNTI and the direct link; and using the direct link transmission resources indicated by the downlink signaling for the destination direct link.

[0012] Optionally, the resource selection information includes the application time-domain location of the direct link transmission resources. Determining the direct link transmission resources for at least one direct link based on the resource selection information includes: determining the general modulation and coding parameters and the link quality of each direct link; determining the actual application time-domain location 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, then the direct link transmission resources whose actual application time-domain location is consistent with the application time-domain location are used for the first direct link.

[0013] Optionally, determining the direct link transmission resources for at least one direct link based 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 is applicable to modulation and coding parameters other than the general modulation and coding parameters, then the direct link transmission resources indicated by the downlink signaling obtained by demodulating the other RNTI besides the general RNTI are used for the second direct link.

[0014] Optionally, determining the direct link transmission resource for at least one direct link based at least on the resource selection information includes: determining a first direct link for which the downlink signaling indication applies based on the resource selection information and the link quality of the at least one direct link; if there are multiple first direct links applicable to the same direct link transmission resource, then determining a final direct link applicable to the same direct link transmission resource from among the multiple first direct links based on the quality of service requirements of the V2X data transmitted by the at least one direct link.

[0015] 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.

[0016] To address the aforementioned technical problems, this invention also discloses a V2X resource scheduling device, comprising: a downlink signaling receiving module, adapted to receive downlink signaling from a base station, wherein the downlink signaling is capable of indicating resource selection information; and a resource scheduling module, adapted to determine, at least based on the resource selection information, direct link transmission resources for at least one direct link.

[0017] This invention also discloses a storage medium storing computer instructions, which, when executed, perform the steps of the V2X resource scheduling method.

[0018] This invention also discloses a user equipment, including a memory and a processor, wherein the memory stores computer instructions that can be executed on the processor, and the processor executes the steps of the V2X resource scheduling method when executing the computer instructions.

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

[0020] The present invention receives downlink signaling from a base station, the downlink signaling indicating resource selection information; and determines, at least based on the resource selection information, direct link transmission resources for at least one direct link. In this invention, the base station can directly or indirectly indicate resource selection information via downlink signaling, and the user equipment can determine the resource selection information via the downlink signaling from the base station. The user equipment can determine the direct link transmission resources for the direct link based at least on the resource selection information, thereby avoiding transmission failures caused by the user equipment independently determining the direct link transmission resources, ensuring the appropriateness of the determined transmission resources for the direct link, and thus improving V2X transmission efficiency.

[0021] Furthermore, the resource selection information includes modulation and coding parameters corresponding to the direct link transmission resource, or the resource selection information includes an index of the destination device to which the direct link transmission resource is 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 an 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 attempt to demodulate the downlink signaling to obtain the resource selection information, thereby ensuring the flexibility of sending and receiving the resource selection information. Attached Figure Description

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

[0023] Figure 2 yes Figure 1 A flowchart of a specific implementation of step S102 shown;

[0024] Figure 3 yes Figure 1 A flowchart of another specific implementation of step S102 shown;

[0025] Figure 4 yes Figure 1 A flowchart of another specific implementation of step S102 shown;

[0026] Figure 5 yes Figure 1 A flowchart of another specific embodiment of step S102 shown;

[0027] Figure 6 yes Figure 1 A flowchart of another specific embodiment of step S102 shown;

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

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

[0030] In the technical solution of this invention, the base station can directly or indirectly indicate resource selection information through downlink signaling, and the user equipment can determine the resource selection information through downlink signaling from the base station. The user equipment can determine the direct link transmission resources for the direct link based at least on the resource selection information, thereby avoiding problems such as transmission failure caused by the user equipment determining the direct link transmission resources on its own, ensuring the suitability of the transmission resources determined for the direct link, and thus improving the transmission efficiency of V2X.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

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

[0033] The V2X resource scheduling method described above can be used on the user equipment side. Specifically, it can be executed by the user equipment. Figure 1 The steps shown can be performed, for example, by the sending user equipment, i.e., the user equipment that sends V2X data. Figure 1 The steps shown.

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

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

[0036] Step S102: Determine at least one direct link transmission resource for at least one direct link based on the resource selection information.

[0037] It should be noted that the sequence number of each step in this embodiment does not represent a limitation on the execution order of each step.

[0038] In this invention, the base station (or serving base station) refers to the base station with which the Tx UE establishes an RRC connection. For the Tx UE, it will only receive downlink signaling from the serving base station. Therefore, the base station in this invention refers to the serving base station of the Tx UE.

[0039] In this embodiment, the user equipment (including transmitting user equipment and receiving user equipment) is 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 a transmitting and receiving user equipment. For example, if two user equipments perform bidirectional V2X data transmission, each user equipment is both a transmitting and receiving user equipment.

[0040] In a specific scenario, a Tx UE can transmit V2X services to multiple receiving UEs (Rx UEs). For example, on frequency F1: it transmits V2X service 1 to UE1, and the direct link between the Tx UE and UE1 is called SL1 (i.e., SL index is SL1); it transmits V2X services 2 and 3 to UE2, and the direct link between the Tx UE and UE2 is called SL2; it transmits V2X service 4 to UE3, and the direct link between the Tx UE and UE3 is called SL3. On frequency F2: it transmits V2X service 5 to UE4, and the direct link between the Tx UE and UE4 is called SL4. The serving base station can configure the SL index corresponding to the direct link, or the Tx UE can indicate the SL index corresponding to different direct links to the serving base station.

[0041] 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. This embodiment of the invention does not limit this.

[0042] The Tx UE can report the link quality of each or some of the direct links to the serving base station. The serving base station can allocate appropriate transmission resources and configure a suitable modulation and coding scheme (MCS) based on the link quality of the direct links currently established by the Tx UE, and then send a DCI instruction to the Tx UE to indicate the direct link transmission resources. The V2X services provided by the Tx UE to different receiving UEs can all be in mode 1, meaning all direct link transmission resources are scheduled by the serving base station; or they can be partially in mode 1, with the remaining parts in mode 2. For example, the direct link transmission resources on frequency F1 are all scheduled by the serving base station, while the direct link transmission resources on frequency F2 are determined by the UE using automatic resource selection. The Tx UE can determine which direct link transmission resources are scheduled by the serving base station and which are determined by the UE's automatic resource selection; or the serving base station can specify which direct link transmission resources are scheduled by the serving base station. This patent does not limit this. The Tx UE typically only needs to report the link quality of the direct links using mode 1.

[0043] In a 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. The downlink signaling can directly or indirectly indicate resource selection information. Specifically, the downlink signaling can be RRC signaling or DCI. Resource selection information can be directly carried in the downlink signaling, for example, the downlink signaling includes 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 resource selection information.

[0044] In practical implementation, resource selection information can directly indicate the direct link to which the direct link transmission resources are applicable. For example, if the DCI contains scheduling information SL grant1, and the DCI can also indicate the direct link SL1 (i.e., the direct link index SLindex), then the UE can use the direct link transmission resources scheduled by scheduling information SL grant1 for direct link SL1.

[0045] In a specific implementation of step S102, the user equipment may determine the direct link transmission resources for the at least one direct link based on the resource selection information, or by combining the resource selection information with the link quality of at least one direct link.

[0046] Specifically, resource selection information can also indicate the link quality value applicable to the direct link transmission resources; in other words, resource selection information can indicate the correspondence between direct link transmission resources and link quality values. More specifically, resource selection information can be the link quality value applicable to the direct link transmission resources indicated by the downlink signaling. Therefore, the user equipment can determine the appropriate direct link transmission resources for the direct link using the resource selection information and the link quality of the direct link.

[0047] In this embodiment of the invention, the base station can directly or indirectly indicate resource selection information through downlink signaling, and the user equipment can determine the resource selection information through downlink signaling from the base station. The user equipment can determine the direct link transmission resources for the direct link based at least on the resource selection information, thereby avoiding problems such as transmission failure caused by the user equipment determining the direct link transmission resources on its own, ensuring the suitability of the transmission resources determined for the direct link, and thus improving the transmission efficiency of V2X.

[0048] In one specific embodiment, the direct link transmission resources can be semi-static direct link transmission resources or dynamic direct link transmission resources scheduled by the base station. For a transmission user equipment in a 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, start time slot, and frequency domain resources occupied by the semi-static direct link transmission resources; the serving base station can also schedule dynamic direct link transmission resources through DCI, with each DCI indicating a direct link transmission resource; the serving base station can also allocate semi-static direct link transmission resources to the transmission user equipment through a combination of RRC signaling and DCI, such as configuring the period of the semi-static direct link transmission resources through RRC signaling, and indicating the start time slot and frequency domain resources occupied by the first direct link transmission resource through DCI, and then repeating according to the period.

[0049] In a non-limiting embodiment of the present invention, the resource selection information includes modulation and coding parameters corresponding to direct link transmission resources. Please refer to... Figure 2 , Figure 1 Step S102 shown may include the following steps:

[0050] Step S201: Determine the modulation and coding parameters corresponding to each direct link based on the first mapping relationship and the link quality of 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.

[0051] Step S202: If there is a direct link whose modulation and coding parameters are consistent with the modulation and coding parameters in the resource selection information, then the direct link transmission resources indicated by the downlink signaling are used for the data transmission of the direct link.

[0052] In this embodiment, the modulation and coding parameters can be MCS. That is, the base station carries the MCS in the downlink signaling.

[0053] In one specific embodiment, the modulation and coding parameters can be the modulation and coding order, such as representing Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (QAM), 64QAM, etc.

[0054] In practice, the first mapping relationship can be pre-configured by the base station, for example, the base station can send the first mapping relationship to the Tx UE in advance via RRC signaling. Alternatively, the first mapping relationship can be pre-agreed upon by the communication standard protocol.

[0055] For details, please refer to Table 1, which shows the first mapping relationship. The first mapping relationship includes multiple link quality values ​​and multiple modulation and coding parameters corresponding to the multiple link quality values.

[0056] Table 1

[0057] 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

[0058] A higher link quality value indicates a higher quality direct link.

[0059] It should be noted that the first mapping relationship can also be any other implementable correspondence between link quality value and MCS, and the embodiments of the present invention do not limit this.

[0060] In one specific embodiment of the present invention, the link quality is represented by a Channel Quality Indicator (CQI).

[0061] In a specific application scenario, the Tx UE determines whether the CQI corresponding to the MCS (which the Tx UE can obtain by looking up the SL CQI corresponding to the MCS) is consistent with the reported CQI of the direct link, based on the CQI of each direct link it reports and the MCS used for the direct link transmission resources indicated in the DCI. If they are consistent, the transmission resources are applied to that direct link. Taking direct links SL1 and SL2 as examples, if the base station knows 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. 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 suitable for the direct link transmission resources corresponding to 16QAM (that is, the direct link transmission resources indicating 16QAM are applied to SL1), and SL2 is suitable for the direct link transmission resources corresponding to 64QAM.

[0062] In a preferred embodiment of the present invention, Figure 1 Step S102 may include the following steps: determining a first direct link applicable to the downlink signaling indication of the direct link transmission resource based on the resource selection information and the link quality of the at least one direct link; if there are multiple first direct links applicable to the same direct link transmission resource, determining a final direct link applicable to the same direct link transmission resource from the multiple first direct links based on the service quality requirements of the V2X data transmitted by the at least one direct link.

[0063] In this embodiment, different V2X services may have different Quality of Service (QoS) requirements, or they may have the same QoS requirements. Specifically, different QoS requirements can be represented by parameters such as priority, transmission delay, and transmission bit error rate. Therefore, if the number of first direct links applicable to the same direct link transmission resource is determined to be multiple based on resource selection information and the link quality of the at least one direct link, the final direct link can be determined based on the QoS requirements of the V2X data transmitted by the at least one direct link.

[0064] In a specific application scenario of this invention, multiple direct links may be able to apply the same MCS. In this case, the Tx UE can combine other QoS parameters of the V2X service, such as latency, to select one of the multiple direct links for V2X transmission. For example, the CQI of 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 that 64QAM modulation and coding scheme is applied to the direct link transmission resource, the Tx UE then combines the latency of the V2X data transmitted on the buffered direct links SL2 and SL3 to determine which one to prioritize for transmission. If the latency requirement of the data transmitted on direct link SL2 is more urgent, the transmission resource can be used to transmit V2X data on direct link SL2 to avoid its latency exceeding the set threshold.

[0065] In a non-limiting embodiment of the present invention, the resource selection information includes an index of the destination device to which the direct link transmission resources are applied. Please refer to... Figure 3 , Figure 1 Step S102 shown may include the following steps:

[0066] Step S301: Determine the destination device according to the second mapping relationship and the index of the destination device, wherein the second mapping relationship includes the indexes of multiple destination devices and their corresponding multiple destination devices;

[0067] Step S302: Determine the direct link associated with the destination device;

[0068] Step S303: Use the direct link transmission resources indicated by the downlink signaling for the associated direct link.

[0069] Since the destination identifier can be very large, such as 24 bits, indicating it via downlink signaling, such as DCI, would increase signaling overhead. Therefore, in this embodiment, the base station can indicate the specific destination index in downlink signaling, such as DCI or RRC signaling.

[0070] For example, UE1's index is 00, UE2's index is 01, UE3's index is 10, and UE4's index is 11. In this way, only 2 bits of information need to be indicated in the downlink signaling, saving signaling overhead.

[0071] In specific implementation, the second mapping relationship can be pre-configured by the base station, for example, the base station can send the second mapping relationship to the Tx UE in advance via RRC signaling. Alternatively, the second mapping relationship can be pre-agreed by the communication standard protocol, such as setting the respective indices according to the UE identifier number. This embodiment of the invention does not impose any restrictions on this.

[0072] In a non-limiting embodiment of the present invention, the resource selection information includes a direct link index (SL Index) applied to the direct link transport resources. Figure 1 Step S102 may include the following steps: determining a direct link based on the direct link index and the third mapping relationship, wherein the third mapping relationship includes multiple direct link indices and their corresponding multiple direct links; and using the direct link transmission resources indicated by the downlink signaling for the determined direct link.

[0073] In this embodiment, the third mapping relationship can be pre-configured by the base station, for example, the base station can send the third mapping relationship to the Tx UE in advance via RRC signaling. Alternatively, the second mapping relationship can be set by the Tx UE and then sent to the base station via RRC signaling.

[0074] 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 SL 2, etc.

[0075] 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 Step S102 shown may include the following steps:

[0076] Step S401: Decode the downlink signaling using different RNTIs, and determine the first RNTI used to successfully demodulate the downlink signaling;

[0077] Step S402: Determine the destination direct link based on the first RNTI and the correspondence between each RNTI and the direct link;

[0078] Step S403: Use the direct link transmission resources indicated by the downlink signaling for the destination direct link.

[0079] In this embodiment, the serving base station can pre-allocate RNTIs for different destinations to the Tx UE, or pre-allocate RNTIs for different direct link indices to the Tx UE. All DCIs transmitted by the serving base station are scrambled with the RNTIs.

[0080] In a specific application scenario, all DCIs transmitted by the base station are scrambled with RNTI, and different RNTIs can be assigned to different destinations. For example, RNTI1 scrambling is used for scheduling (i.e., SL Grant) of direct link transmission resources for UE1 (i.e., direct link SL1); RNTI2 scrambling is used for scheduling of direct link transmission resources for UE2 (i.e., direct link SL2); and RNTI3 scrambling is used for scheduling of direct link transmission resources for UE3 (i.e., direct link SL3).

[0081] When the Tx UE receives the SL Grant sent by the base station through DCI, it can use different RNTIs to decode the DCI to find out which destination device the direct link transmission resources scheduled by the SL Grant are used for, and thus determine which direct link the direct link transmission resources scheduled by the SL Grant are used for.

[0082] In a non-limiting embodiment of the present invention, the resource selection information includes the application time-domain location of the direct link transmission resource, please refer to... Figure 5 , Figure 1 Step S102 shown may include the following steps:

[0083] Step S501: Determine the general modulation and coding parameters and the link quality of each direct link;

[0084] Step S502: Determine the actual application time domain location of each direct link transmission resource;

[0085] Step S503: If it is determined that the first direct link is subject to modulation and coding parameters other than the general modulation and coding parameters, then the direct link transmission resources that are consistent with the application time domain location are used for the first direct link.

[0086] In this embodiment, the direct link transmission resources applicable to a subset of direct links can be determined. The subset of direct links may refer to the first direct link, that is, the direct link that applies modulation and coding parameters other than the general modulation and coding parameters. The general modulation and coding parameters refer to the MCS used by default for the direct link.

[0087] It is understandable that general modulation and coding parameters can be configured by the base station for the user equipment, or they can be agreed upon by the communication standard protocol.

[0088] In a specific application scenario of this invention, the default MCS for direct links is 16QAM. If a Tx UE reports that direct link SL0 can use a 64QAM CQI, the base station pre-configures the time domain location for the transmission resources applied to SL0 for the UE via RRC signaling. Specifically, this can be transmission time slot parameters, so that when the Tx UE receives an SL grant, it can apply the direct link transmission resources scheduled by the grant with the specified time domain location to direct link SL0. For example, if the base station learns that the CQI for direct link SL3 is 64QAM, the base station instructs the Tx UE via RRC signaling to use the transmission resources with an MCS of 64QAM for direct link SL3, and only for specific transmission time slots. When the Tx UE receives the SL Grant indicated by the DCI from the base station, the DCI may indicate the time slot to which the SL Grant is applied, or the application time slot of the SL Grant and the time slot where the DCI is located have a protocol-preset time interval (such as an interval of 1 time slot). The Tx UE can know the actual application time domain location of the transmission resources scheduled by the SL Grant, that is, the application time slot. If the time slot belongs to the specific transmission time slot indicated by the aforementioned base station, the Tx UE determines to use the transmission resources scheduled by the SL Grant for the direct link SL3.

[0089] In a non-limiting embodiment of the present invention, please refer to Figure 6 , Figure 1 Step S102 shown may include the following steps:

[0090] Step S601: Determine the general RNTI, general modulation and coding parameters, and link quality of each direct link;

[0091] Step S602: If it is determined that the second direct link is subject to modulation and coding parameters other than the general modulation and coding parameters, then the direct link transmission resources indicated by the downlink signaling obtained by demodulation using an RNTI other than the general RNTI are used for the second direct link.

[0092] Unlike the previous embodiments, this embodiment of the invention determines the applicable direct link transmission resources for a portion of the direct links based on the RNTI of the scrambled downlink signaling. The portion of the direct links may refer to a second direct link, that is, a direct link that applies modulation and coding parameters other than the general modulation and coding parameters. The general modulation and coding parameters refer to the MCS used by default for the direct links.

[0093] In a specific application scenario of this invention, the default MCS for direct links is 16QAM. The base station learns that the CQI for direct link SL3 uses 64QAM. The base station uses a special RNTI (Special RNTI) for scheduling direct link SL3, while using a general RNTI, such as SL C-RNTI, for scheduling other SL grants. In this case, the scheduling information may not indicate the MCS. The Tx UE receives a DCI scrambled with the special RNTI, learns the indicated direct link transmission resources, and uses them for direct link SL3, which can use 64QAM. When the Tx UE receives a DCI scrambled with SL C-RNTI, learns the indicated direct link transmission resources, and can use them for other direct links. Furthermore, the Tx UE can also determine which direct link to use the transmission resources scheduled by the SL grant for, based on the QoS of the V2X service.

[0094] Please refer to Figure 7 The present invention also discloses a V2X resource scheduling device 70, which may include a downlink signaling receiving module 701 and a resource scheduling module 702.

[0095] The downlink signaling receiving module 701 is adapted to receive downlink signaling from the base station, the downlink signaling being able to indicate resource selection information; the resource scheduling module 702 is adapted to determine, at least based on the resource selection information, direct link transmission resources for at least one direct link.

[0096] In this embodiment of the invention, the base station can directly or indirectly indicate resource selection information through downlink signaling, and the user equipment can determine the resource selection information through downlink signaling from the base station. The user equipment can determine the direct link transmission resources for the direct link based at least on the resource selection information, thereby avoiding problems such as transmission failure caused by the user equipment determining the direct link transmission resources on its own, ensuring the suitability of the transmission resources determined for the direct link, and thus improving the transmission efficiency of V2X.

[0097] For more information on the working principle and operation mode of the V2X resource scheduling device 70, please refer to [link / reference needed]. Figures 1 to 6 The relevant descriptions in the text will not be repeated here.

[0098] This invention also discloses a storage medium storing computer instructions that can be executed when run. Figures 1 to 6 The steps of the method shown are illustrated. The storage medium may include ROM, RAM, disk, or optical disk, etc. The storage medium may also include non-volatile memory or non-transitory memory, etc.

[0099] This invention also discloses a user equipment, which may include a memory and a processor. The memory stores computer instructions that can be executed on the processor. When the processor executes the computer instructions, it can perform... Figures 1 to 6 The steps of the method shown are illustrated. The user equipment includes, but is not limited to, user equipment such as mobile phones, computers, and tablets.

[0100] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A V2X resource scheduling method, characterized in that, include: Report the link quality of the direct link in application mode 1; Receive downlink signaling from the base station, the downlink signaling being able to indicate resource selection information and direct link transmission resources, the direct link transmission resources being allocated according to the link quality, the resource selection information including the direct link index to which the direct link transmission resources are applied; At least one direct link transmission resource is determined based on the resource selection information. Specifically, a direct link is determined based on the direct link index and a third mapping relationship, wherein the third mapping relationship includes multiple direct link indices and their corresponding multiple direct links. The direct link transmission resource indicated by the downlink signaling is used for the determined direct link. The resource selection information includes the application time-domain location of the direct link transmission resources. The step of determining the direct link transmission resources for at least one direct link based on the resource selection information further includes: determining the general modulation and coding parameters and the link quality of each direct link; determining the actual application time-domain location 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, then the direct link transmission resources whose actual application time-domain location is consistent with the application time-domain location are used for the first direct link.

2. The V2X resource scheduling method according to claim 1, characterized in that, The resource selection information includes modulation and coding parameters corresponding to the direct link transmission resources, and the step of determining the direct link transmission resources for at least one direct link based on the resource selection information further includes: The modulation and coding parameters corresponding to each direct link are determined based on the first mapping relationship and the link quality of 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 the modulation and coding parameters corresponding to a direct link are consistent with the modulation and coding parameters in the resource selection information, then the direct link transmission resources indicated by the downlink signaling will be used for data transmission on the direct link.

3. The V2X resource scheduling method according to claim 2, characterized in that, The modulation and coding parameters are the modulation and coding order.

4. The V2X resource scheduling method according to claim 1, characterized in that, The resource selection information includes an index of the destination device to which the direct link transmission resource is applied, and determining the direct link transmission resource for at least one direct link based on the resource selection information further includes: The destination device is determined based on the second mapping relationship and the index of the destination device, wherein the second mapping relationship includes the indexes of multiple destination devices and their corresponding multiple destination devices; Determine the direct link associated with the target device; The direct link transmission resources indicated by the downlink signaling are used for the associated direct link.

5. The V2X resource scheduling method according to claim 1, characterized in that, The resource selection information includes the RNTI used to scramble the downlink signaling, and the step of determining the direct link transmission resources for at least one direct link based on the resource selection information further includes: The downlink signaling is decoded using different RNTIs, and the first RNTI used to successfully demodulate the downlink signaling is determined. The destination direct link is determined based on the first RNTI and the correspondence between each RNTI and the direct link; The direct link transmission resources indicated by the downlink signaling are used for the destination direct link.

6. The V2X resource scheduling method according to claim 1, characterized in that, The step of determining the direct link transmission resources for at least one direct link based on the resource selection information further includes: Determine the general RNTI, general modulation and coding parameters, and link quality for each direct link; If it is determined that the second direct link is subject to modulation and coding parameters other than the general modulation and coding parameters, then the direct link transmission resources indicated by the downlink signaling obtained by demodulation using an RNTI other than the general RNTI will be used for the second direct link.

7. The V2X resource scheduling method according to claim 1, characterized in that, The step of determining the direct link transmission resources for at least one direct link based at least on the resource selection information further includes: Based on the resource selection information and the link quality of the at least one direct link, a first direct link for which the downlink signaling indication applies to the direct link transmission resources is determined; If there are multiple first direct links applicable to the same direct link transmission resource, then the final direct link applicable to the same direct link transmission resource is determined from the multiple first direct links based on the quality of service requirements of the V2X data transmitted by the at least one direct link.

8. The V2X resource scheduling method according to claim 1, characterized in that, The link quality reporting for direct links in application mode 1 also includes: Receive configuration information for the direct link using mode 1.

9. A V2X resource scheduling device, characterized in that, include: This module is used to report the link quality of direct links in application mode 1. A downlink signaling receiving module is adapted to receive downlink signaling from a base station. The downlink signaling can indicate resource selection information and direct link transmission resources. The direct link transmission resources are allocated according to the link quality. The resource selection information includes the direct link index to which the direct link transmission resources are applied. A resource scheduling module is adapted to determine, at least based on the resource selection information, direct link transmission resources for at least one direct link. The resource scheduling module determines the direct link based on the direct link index and a third mapping relationship, the third mapping relationship including multiple direct link indices and their corresponding direct links. The module then uses the direct link transmission resources indicated by the downlink signaling for the determined direct links. The resource selection information includes the application time-domain location of the direct link transmission resources. The process of determining, at least based on the resource selection information, the direct link transmission resources for at least one direct link further includes: determining general modulation and coding parameters and the link quality of each direct link; determining the actual application time-domain location of each direct link transmission resource; and if it is determined that the first direct link uses modulation and coding parameters other than the general modulation and coding parameters, then the direct link transmission resources whose actual application time-domain location matches the application time-domain location are used for the first direct link.

10. A storage medium storing computer instructions thereon, characterized in that, When the computer instructions are executed, they perform the steps of the V2X resource scheduling method according to any one of claims 1 to 8.

11. A user equipment comprising a memory and a processor, wherein the memory stores computer instructions executable on the processor, characterized in that, When the processor executes the computer instructions, it performs the steps of the V2X resource scheduling method according to any one of claims 1 to 8.

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