CN107347215B - Resource allocation method and terminal in V2X network - Google Patents

Abstract

The present invention relates to a resource allocation method and a terminal in a V2X network. The terminal reports service cycle attribute information to a base station, so that the base station allocates resources for the terminal in a semi-persistent scheduling manner according to the service cycle attribute information; wherein The terminal carries the service cycle attribute information by using a control unit of the medium access control layer of a transmission feature report or an extended secondary link buffer status report. The method for allocating resources in the V2X network and the terminal provided by the embodiments of the present invention, the terminal uses the control unit of the medium access control layer of the transmission characteristic report to carry the service period attribute information, so that the base station can obtain whether the service of the UE is periodic and the corresponding periodic interval, so that the base station can use semi-persistent scheduling to allocate resources on the PC5 port for the UE according to the periodic interval reported by the UE, which greatly saves the overhead of the control channel and indirectly reduces the transmission time of periodic services. delay.

Description

Resource allocation method and terminal in V2X network

technical field

The present invention relates to the field of communication technologies, and in particular to a resource allocation method and a terminal in a V2X network.

Background technique

V2X (Vehicle to X), that is, the information exchange between the vehicle and the outside world, is the key technology of the future intelligent transportation system. V2X was approved as a project at the 3GPP RAN#68 meeting, mainly researching the vehicle data transmission scheme based on the 3GPP communication protocol. V2X communication includes V2V communication (vehicle-to-vehicle communication), V2I communication (vehicle-to-roadside infrastructure communication) and V2P communication (vehicle-to-pedestrian communication). The application of V2X will improve driving safety, reduce congestion and vehicle energy consumption, improve traffic efficiency and in-vehicle entertainment information, etc.

The basic message types of V2X are divided into cooperative awareness message (Cooperative Awareness Message, CAM message) and decentralized environment notification message (Decentralized Environmental Notification Message, DENM message). The CAM message is used to provide the neighbor intelligent transport system (Intelligent Transport System, ITS for short) terminal within the single-hop communication range to provide the basic status information of the ITS terminal, such as the position, speed, acceleration, direction, etc. Scenes such as car approaching instructions. After all vehicle direct communication nodes are started, CAM messages will generally be sent out according to a certain period. The DENM message is used to notify the occurrence of a specific event. When a defined specific event occurs, the corresponding DENM message will be triggered. Before the event is canceled, the corresponding DENM message will be sent out periodically. It is suitable for emergency electronic brake light warning and reverse overtaking reminder Wait for the scene.

At present, in the existing 3GPP protocol, for the sidelink communication, the base station (eNode B) can know the cache of the service to be sent by the terminal (UE) on the PC5 port through the sidelink buffer status report (Sidelink Buffer Status Report, Sidelink BSR). volume, but the cyclical attributes of the business cannot be obtained. V2X is researched based on D2D technology. Most of the V2X services have the characteristics of periodic broadcasting or event-triggered periodic broadcasting within a limited time. However, in the current 3GPP protocol, the UE reports the cycle interval information of the periodic service, so the base station cannot adopt an appropriate scheduling method to allocate resources for the UE according to the service cycle attribute of the UE, so there is a lot of unnecessary control resource overhead. Therefore, in the research on the vehicle data transmission scheme based on the 3GPP communication protocol, how to make the eNode B adopt a more suitable scheduling method to allocate resources for the UE is an urgent problem to be solved.

Contents of the invention

The technical problem to be solved by the present invention is how to make the base station adopt a more suitable scheduling method to allocate resources for the terminal.

For this purpose, the present invention proposes a resource allocation method in a V2X network, including:

The terminal reports service cycle attribute information to the base station, so that the base station uses semi-persistent scheduling to allocate resources for the terminal according to the service cycle attribute information;

Wherein, the terminal carries the service cycle attribute information by using the control unit of the medium access control layer of the transmission characteristic report or the extended secondary link buffer status report.

Preferably, the control unit of the media access control layer using the transmission characteristic report carries the service cycle attribute information specifically through:

The media access control layer control unit of the transmission feature report newly added at the media access control layer carries the service period attribute information; the format of the media access control layer control unit includes each item and the target identification index The transmission characteristic of the service associated with the field and the logical channel group, the transmission characteristic includes the period interval field, the target identification index field and the logical channel group identification field corresponding to the service buffer amount, so as to carry the service period attribute information.

Preferably, the method also includes:

There is a new secondary link radio bearer used to transmit V2X services in the terminal, and the V2X service carried on the logical channel corresponding to the secondary link radio bearer is periodic; or, the logical channel corresponding to the established secondary link radio bearer On the premise that the transmission frequency of the V2X service carried by the network changes,

If the transmission characteristic report process is confirmed, and at least one transmission characteristic report is triggered and has not been cancelled: if the terminal has an uplink authorization for new data transmission within the preset transmission time interval, notify the multiplexing combination entity to generate the medium of the transmission characteristic report Access to the control unit of the control layer, otherwise a scheduling request is triggered.

Preferably, the control unit of the media access control layer of the transmission characteristic report is identified by the subheader of the media access control layer protocol data unit carrying the logical channel identification value;

Wherein, the logical channel identifier value of the MAC layer protocol data unit subheader corresponding to the MAC layer control unit of the newly added transmission characteristic report is a reserved value of the logical channel identifier of the uplink shared channel.

Preferably, the control unit of the media access control layer using the extended secondary link cache state carries the service cycle attribute information specifically through:

Extending the MAC layer control unit of the secondary link cache status report, adding a period interval field to the format of the MAC layer control unit of the secondary link buffer status report.

Preferably, the method also includes:

There is a new secondary link radio bearer used to transmit V2X services in the terminal, and the V2X service carried on the logical channel corresponding to the secondary link radio bearer is periodic; or, on the logical channel corresponding to the established secondary link radio bearer On the premise that the transmission frequency of the carried V2X service changes,

If the number of bits of the uplink grant is greater than or equal to the bits of the extended secondary link buffer status report and the medium access control layer subheader of the secondary link buffer status report including the buffer status of all logical channel groups that can transmit data The sum of the numbers, the terminal reports the extended secondary link buffer status report, wherein the secondary link buffer status report contains all buffer status and period information of logical channel groups that can transmit data; otherwise, the extended secondary link buffer status report is reported. The reduced secondary link buffer status report, considering the number of bits that can be carried by the uplink grant, the reduced secondary link buffer status report includes buffer status and cycle information of multiple logical channel groups that can transmit data.

Preferably, the control unit of the media access control layer of the secondary link buffer status report and the control unit of the media access control layer of the reduced secondary link buffer status report include a periodic interval associated with each target group report field, target identification index field, logical channel group identification field and buffer size field.

Preferably, the cycle interval field is used to indicate a service cycle interval;

The target identification index field is used to identify the target, and its value corresponds to the target serial number reported in the target information list;

The logical channel group identification field is used to identify the logical channel group corresponding to the buffer state.

Preferably, the method further includes: if the same logical channel group identifier of the same target corresponds to multiple logical channel identifiers, and the service period intervals corresponding to the logical channel identifiers are different, the value of the period interval is the service period The minimum value for the interval.

On the other hand, the present invention also provides a terminal, including:

A reporting unit, configured to report service cycle attribute information to the base station, so that the base station allocates resources to the terminal in a semi-persistent scheduling manner according to the service cycle attribute information;

Wherein, the reporting unit carries the service cycle attribute information by using the control unit of the media access control layer of the transmission characteristic report or the extended secondary link buffer status report.

The method for allocating resources in the V2X network and the terminal provided by the embodiments of the present invention, the terminal uses the control unit of the medium access control layer of the transmission characteristic report to carry the service period attribute information, so that the base station can obtain whether the service of the UE is periodic And the corresponding periodic interval, so that the base station can use the semi-persistent scheduling method to allocate resources on the PC5 port (the interface for direct communication between vehicles) to the UE according to the periodic interval reported by the UE, which greatly saves the overhead of the control channel , and indirectly reduces the transmission delay of periodic services.

Description of drawings

The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the invention in any way. In the accompanying drawings:

FIG. 1 is a schematic flowchart of a resource allocation method in a V2X network provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of a frame of a terminal provided by an embodiment of the present invention.

Detailed ways

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1 , an embodiment of the present invention provides a method for allocating resources in a V2X (Vehicle to X, that is, information exchange between a vehicle and the outside world) network, including:

S1: The terminal reports service cycle attribute information to the base station, so that the base station uses semi-persistent scheduling to allocate resources for the terminal according to the service cycle attribute information;

Wherein, the terminal carries the service cycle attribute information by using the control unit of the media access control layer of the transmission characteristic report or the extended secondary link buffer status report.

In the resource allocation method in the V2X network provided by the embodiment of the present invention, the terminal carries the service period attribute information by using the control unit of the medium access control layer of the transmission characteristic report or the extended secondary link buffer status report, so that the base station can obtain UE Whether the service has a periodicity and a corresponding periodic interval, so that the base station can use the semi-persistent scheduling method to allocate resources on the PC5 port (the interface for direct communication between vehicles) to the UE according to the periodic interval reported by the UE. The overhead of the control channel is saved, and the transmission delay of periodic services is also indirectly reduced.

Preferably, the terminal uses the control unit of the medium access control layer of the transmission characteristic report to carry the service period attribute information specifically through the following method one:

Method 1: Use the control unit of the media access control layer newly added in the media access control layer to report the transmission characteristics to carry the service cycle attribute information; the format of the control unit of the media access control layer includes each The target identification index field and the transmission characteristics of the service associated with the logical channel group, the transmission characteristics include the periodic interval field, the target identification index field and the logical channel group identification field corresponding to the service buffer amount, so as to carry the service cycle attribute information;

Preferably, the terminal uses the control unit of the medium access control layer of the extended secondary link cache status report to carry the service cycle attribute information, specifically through the following method two:

Mode 2: Extend the MAC layer control unit of the secondary link cache status report, and add a period interval field in the format of the MAC layer control unit of the secondary link buffer status report.

The two methods are described in detail below.

Mode 1, specifically, by adding a MAC control element (MAC CE) for transmission feature report at the medium access control layer (MAC layer), and adding a periodic interval (Periodic Interval) field and a target identification index in the MAC CE (Destination ID index) domain and the logical channel group identifier (LCG ID) domain corresponding to the service buffer volume, so as to realize the report of the period attribute of the service to the base station. If the service of the UE is periodic, the UE will set the period of the service The interval is reported to the base station, so that the base station can allocate reasonable resources for the UE according to the periodicity of the service, so as to avoid waste of resources.

The transmission feature reporting process is used to provide the base station with the transmission feature information of the periodic service that the UE currently has. The transmission feature information mainly includes the period interval of the service data and the identification information of the service data, such as the target identification corresponding to the service data ( ID) index and the LCG ID field corresponding to the cached amount of the service data.

On the basis of the above embodiments, there is a new secondary link radio bearer used to transmit V2X services in the terminal, and the V2X service carried on the logical channel corresponding to the secondary link radio bearer is periodic; or, the established secondary link On the premise that the transmission frequency of the V2X service carried on the logical channel corresponding to the link radio bearer changes,

If the transmission characteristic report process is confirmed, and at least one transmission characteristic report is triggered and has not been cancelled: if the terminal has an uplink authorization for new data transmission within the preset transmission time interval, notify the multiplexing combination entity to generate the medium of the transmission characteristic report Access to the control unit of the control layer, otherwise a scheduling request is triggered.

Specifically, the following events shall trigger transmission characteristic reporting:

A. Create a new SLRB (Sidelink Radio Bearer, secondary link radio bearer) for the transmission of V2X services. The SLRB corresponds to a PDCP entity at the PDCP (Packet Data Convergence Protocol) layer, and bears on the corresponding logical channel V2X services are cyclical.

B. The transmission frequency of the V2X service carried on the logical channel corresponding to the established SLRB changes, that is, the data arrival cycle interval changes.

In addition, the PeriodicInterval associated with the Destination ID index and the LCG ID corresponding to the V2X service needs to be reported to the eNB, which triggers the reporting of a new MAC CE.

The MAC CE reporting process is as follows:

If the transmission characteristic report process is determined, at least one transmission characteristic report is triggered and has not been canceled: If the UE has an uplink authorization for new data transmission in the transmission time interval (TTI), notify the multiplexing combination entity to generate a transmission characteristic report MAC CE; Otherwise, trigger a dispatch request.

Preferably, the MAC CE of the transmission characteristic report is identified by a medium access control layer protocol data unit (MAC PUD) subheader carrying a logical channel identifier (LCID) value;

Wherein, the logical channel identifier value of the MAC layer protocol data unit subheader corresponding to the MAC layer control unit of the newly added transmission characteristic report is a reserved value of the logical channel identifier of the uplink shared channel.

As shown in Table 1, the transmission feature report MAC CE is identified by the MAC PDU header carrying the LCID. The MAC CE has a variable length. The transmission features of each service associated with the target ID and logical channel group should include the following Domain: periodic interval field, which is used to indicate the periodic interval of business data; target ID index field, which is used to identify the target, and its value corresponds to the target serial number reported by the target information list (destinationInfoList in TS36.331) ; Logical channel group identification field, this field is used to identify the logical channel group corresponding to the buffer state.

The newly added transmission characteristic MAC CE corresponds to the LCID value of the MAC PDU header using the reserved value in the LCID of the uplink shared channel (UL-SCH). For example, the value can be 10101, as shown in Table 1, but it is not limited to this value .

Table 1 LCID value of UL-SCH

index LCID value 00000 CCCH 00001-01010 Identity of the logical channel 01011 CCCH 01100-10100 reserve 10101 Transfer Characteristics Report 10110 Cut Sidelink BSR 10111 Sidelink BSR 11000 Dual Link Power Headroom Report 11001 Extended Power Headroom Report 11010 Power Headroom Report 11011 C-RNTI 11100 cut BSR 11101 short BSR 11110 long BSR 11111 filling

For ease of understanding, Table 2 and Table 3 provide an implementation manner of the format of the newly added transmission characteristic report MAC CE. For example, the target ID index field has a length of 4 bits, the logical channel group ID field has a length of 2 bits, and the period interval field has a length of 4 bits. In addition, R is a reserved bit, which is set to "0".

Table 2 Format of newly added MAC CE when N is an even number

Table 3 Format of newly added MAC CE when N is an odd number

In addition, the Periodic Interval field is used to indicate the periodic interval of service data. Table 4 shows the PeriodicInterval parameter values, but is not limited to these values.

Table 4Periodic Interval parameter value

index Periodic Interval parameter value (ms) 0 N/A 1 10 2 20 3 32 4 50 5 100 6 200 7 300 8 400 9 500 10 600 11 700 12 800 13 900 14 1000 15 Reserved

On the basis of the above embodiments, preferably, if the same logical channel group identifier (LCG ID) of the same destination (Destination) corresponds to multiple logical channel identifiers (LCID), and all the logical channel identifiers (LCID) corresponding to If the service period intervals are different, the value of the period interval is the minimum value of the service period intervals, that is, the minimum period interval of these services is taken as the value of the Periodic Interval.

Method 2, specifically, expand the existing media access control layer control unit (sidelink BSR MAC CE) of the secondary link buffer status report, and add a periodic interval field (periodicinterval) in the format of the sidelink BSR MAC CE, To realize the reporting of V2X service period attribute information, this field is used to indicate the period interval of service data.

The extended sidelink buffer status reporting (SL BSR, sidelink Buffer Status reporting) process is used to provide the serving eNode B with the amount of Sidelink data buffered in the Sidelink buffer of the UE MAC entity and the periodic interval information with periodic services.

On the basis of the above embodiments, preferably, there is a new secondary link radio bearer used to transmit V2X services in the terminal, and the V2X service carried on the logical channel corresponding to the secondary link radio bearer is periodic; or, the established Under the premise that the transmission frequency of the V2X service carried on the logical channel corresponding to the secondary link radio bearer changes,

If the number of bits of the uplink grant is greater than or equal to the bits of the extended secondary link buffer status report and the medium access control layer subheader of the secondary link buffer status report including the buffer status of all logical channel groups that can transmit data The sum of the numbers, the terminal reports the extended secondary link buffer status report, wherein the secondary link buffer status report contains all buffer status and period information of logical channel groups that can transmit data; otherwise, the extended secondary link buffer status report is reported. The reduced secondary link buffer status report, considering the number of bits that can be carried by the uplink grant, the reduced secondary link buffer status report includes buffer status and cycle information of multiple logical channel groups that can transmit data.

Specifically, for the extended Sidelink BSR MAC CE reporting mechanism, compatible with the Sidelink BSR trigger reporting mechanism, the following events should trigger the extended SL BSR:

The SL BSR trigger conditions stipulated in the 3GPP LTE protocol include regular SL BSR (Regular Sidelink BSR), padding SL BSR (Padding Sidelink BSR) and periodic SL BSR (Periodic Sidelink BSR).

A. Create a new SLRB for the transmission of V2X services. The SLRB corresponds to a PDCP entity at the PDCP layer, and the V2X services carried on the corresponding logical channels are periodic. Such a BSR is called a V2X SL BSR.

B. The transmission frequency of the V2X service carried on the logical channel corresponding to the established SLRB changes, that is, the data arrival cycle interval changes. Such a BSR is called a V2X SL BSR.

In addition, if the PeriodicInterval associated with the Destination ID index and LCG ID corresponding to the V2X service needs to be updated, a sidelink BSR report is triggered.

For regular SL BSR, periodic SL BSR and V2X BSR, the sidelink BSR reporting process is as follows:

If the number of bits of the uplink grant is greater than or equal to the sum of the bits of the extended SL BSR and its MAC subheader including the buffer status of all logical channel groups that can transmit data, report the extended Sidelink BSR, which contains all Buffer status of logical channel groups with data transferable;

Otherwise, an extended Truncated Sidelink BSR (Truncated Sidelink BSR) is reported. Considering the number of bits that can be carried by the uplink grant, the Truncated Sidelink BSR includes buffer states of as many logical channel groups that can transmit data as possible.

Preferably, the control unit of the media access control layer of the secondary link buffer status report and the control unit of the media access control layer of the reduced secondary link buffer status report include a period associated with each target group report interval field, target identification index field, logical channel group identification field and buffer size field. That is, the extended Sidelink BSR and the reduced Sidelink BSR MAC CE include a target identification index (DestinationID Index) field, a logical channel group identification (LCG ID) field and a buffer size (Buffer Size) associated with each target group report field, and a periodic interval (periodic interval) field. Preferably, each target group should contain the following fields: target identification index field, this field is used to identify the target ID, the length is 4 bits, and its value corresponds to the target sequence number reported by destinationInfoList in TS36.331. Logical channel group identification (LCG ID) field: This field is used to identify the logical channel group corresponding to the buffer state, and the length is 2 bits. Buffer Size (Buffer Size) field: This field is used to identify the total transmittable data of all logical channels in the logical channel group of the target ID after the MAC PDU in the current TTI is assembled.

Wherein, the extended SL BSR MAC CE is identified by the subheader of the MAC PDU carrying the LCID. If the extended SL BSR MAC CE is identified by the LCID value used by the original SL BSR MAC CE, the UE and eNode B can specify the format of the SL BSR MAC CE to be used according to supporting different protocol versions, or according to whether the terminal supports V2X service functions Use the SL BSR MAC CE format, or the eNode B indicates the SL BSR MAC CE format used when the UE reports the SL BSR through the RRC message according to the UE capability information. If the extended SL BSR MAC CE does not use the LCID value identification used by the original SL BSR MAC CE, but uses the reserved value in the LCID of the UL-SCH, for example, the original reduced Sidelink BSR and Sidelink BSR use 10110 and 10111 respectively , and the extended cut Sidelink BSR and the extended Sidelink BSR respectively use reserved values such as 10100 and 10101, as shown in Table 5, but are not limited to these two values.

Table 5 LCID value of UL-SCH

index LCID value 00000 CCCH 00001-01010 Identity of the logical channel 01011 CCCH 01100-10011 reserve 10100 Extended Cut Sidelink BSR 10101 Extended Sidelink BSRs 10110 Cut Sidelink BSR 10111 Sidelink BSR 11000 Dual Link Power Headroom Report 11001 Extended Power Headroom Report 11010 Power Headroom Report 11011 C-RNTI 11100 cut BSR 11101 short BSR 11110 long BSR 11111 filling

An embodiment of the extended SL BSR MAC CE format is given below. The extended Sidelink BSR MAC CE format given with the periodic interval field (periodicinterval) as 4 bits is shown in Table 6 below.

Table 6 Extended Sidelink BSR MAC CE format

If the same LCG ID of the same Destination corresponds to multiple LCIDs, and the service period intervals corresponding to these LCIDs are different, take the smallest period interval of these services as the value of the Periodic Interval.

On the other hand, as shown in FIG. 2, the embodiment of the present invention also provides a terminal, the terminal adopts the resource allocation method in the V2X network provided by the above embodiment, and the terminal 2 includes: a reporting unit 21;

The reporting unit 21 is configured to report service cycle attribute information to the base station, so that the base station allocates resources for the terminal in a semi-persistent scheduling manner according to the service cycle attribute information; wherein, the reporting unit 21 reports or The control unit of the medium access control layer of the secondary link cache status report is extended to carry the service period attribute information.

The terminal provided by the embodiment of the present invention uses the control unit of the medium access control layer of the transmission characteristic report to carry the service period attribute information, so that the base station can obtain whether the service of the UE is periodic and the corresponding period interval. In this way, the base station according to UE The periodic interval of reporting can use semi-persistent scheduling to allocate resources on the PC5 port for the UE, which greatly saves the overhead of the control channel and indirectly reduces the transmission delay of periodic services.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention. within the bounds of the requirements.

Claims (9)

1. A method for allocating resources in a V2X network, comprising: The terminal reports service cycle attribute information to the base station, so that the base station uses semi-persistent scheduling to allocate resources for the terminal according to the service cycle attribute information; Wherein, the terminal carries the service cycle attribute information by using the control unit of the media access control layer of the transmission characteristic report or the extended secondary link buffer status report; The control unit of the media access control layer using the transmission characteristic report carries the service cycle attribute information specifically through: The media access control layer control unit of the transmission feature report newly added at the media access control layer carries the service period attribute information; the format of the media access control layer control unit includes each item and the target identification index The transmission characteristic of the service associated with the field and the logical channel group, the transmission characteristic includes the period interval field, the target identification index field and the logical channel group identification field corresponding to the service buffer amount, so as to carry the service period attribute information. 2. A method for allocating resources in a V2X network according to claim 1, further comprising: There is a new secondary link radio bearer used to transmit V2X services in the terminal, and the V2X service carried on the logical channel corresponding to the secondary link radio bearer is periodic; or, the logical channel corresponding to the established secondary link radio bearer On the premise that the transmission frequency of the V2X service carried by the network changes, If the transmission characteristic report process is confirmed, and at least one transmission characteristic report is triggered and has not been cancelled: if the terminal has an uplink authorization for new data transmission within the preset transmission time interval, notify the multiplexing combination entity to generate the medium of the transmission characteristic report Access to the control unit of the control layer, otherwise a scheduling request is triggered. 3. A method for allocating resources in a V2X network according to claim 2, wherein the control unit of the media access control layer of the transmission characteristic report passes the media access control layer carrying the logical channel identification value Protocol data unit sub-header for identification; Wherein, the logical channel identifier value of the MAC layer protocol data unit subheader corresponding to the MAC layer control unit of the newly added transmission characteristic report is a reserved value of the logical channel identifier of the uplink shared channel. 4. A method for allocating resources in a V2X network according to claim 1, wherein the control unit of the media access control layer using the extended secondary link cache status report carries the service cycle attribute information Specifically through: Extending the MAC layer control unit of the secondary link cache status report, adding a period interval field to the format of the MAC layer control unit of the secondary link buffer status report. 5. A method for allocating resources in a V2X network according to claim 4, further comprising: There is a new secondary link radio bearer used to transmit V2X services in the terminal, and the V2X service carried on the logical channel corresponding to the secondary link radio bearer is periodic; or, on the logical channel corresponding to the established secondary link radio bearer On the premise that the transmission frequency of the carried V2X service changes, If the number of bits of the uplink grant is greater than or equal to the bits of the extended secondary link buffer status report and the medium access control layer subheader of the secondary link buffer status report including the buffer status of all logical channel groups that can transmit data The sum of the numbers, the terminal reports the extended secondary link buffer status report, wherein the secondary link buffer status report contains all buffer status and period information of logical channel groups that can transmit data; otherwise, the extended secondary link buffer status report is reported. The reduced secondary link buffer status report, considering the number of bits that can be carried by the uplink grant, the reduced secondary link buffer status report includes buffer status and cycle information of multiple logical channel groups that can transmit data. 6. A method for allocating resources in a V2X network according to claim 5, characterized in that the media access control layer control unit of the secondary link buffer status report and the reduced secondary link buffer status The control unit of the reported MAC layer includes a period interval field, a target identification index field, a logical channel group identification field and a buffer size field associated with each target group report. 7. A method for allocating resources in a V2X network according to claim 1 or 6, characterized in that, The cycle interval field is used to indicate the service cycle interval; The target identification index field is used to identify the target, and its value corresponds to the target serial number reported in the target information list; The logical channel group identification field is used to identify the logical channel group corresponding to the buffer state. 8. A method for allocating resources in a V2X network according to claim 1 or 6, further comprising: if the same logical channel group identifier of the same target corresponds to multiple logical channel identifiers, and the logic The service cycle intervals corresponding to the channel identifiers are different, and the value of the cycle interval is the minimum value of the service cycle intervals. 9. A terminal, characterized in that, comprising: A reporting unit, configured to report service cycle attribute information to the base station, so that the base station allocates resources to the terminal in a semi-persistent scheduling manner according to the service cycle attribute information; Wherein, the reporting unit carries the service period attribute information by using the control unit of the media access control layer of the transmission characteristic report or the extended secondary link buffer status report; The control unit of the media access control layer using the transmission characteristic report carries the service cycle attribute information specifically through: The media access control layer control unit of the transmission feature report newly added at the media access control layer carries the service period attribute information; the format of the media access control layer control unit includes each item and the target identification index The transmission characteristic of the service associated with the field and the logical channel group, the transmission characteristic includes the period interval field, the target identification index field and the logical channel group identification field corresponding to the service buffer amount, so as to carry the service period attribute information.