WO2015131544A1 - 一种控制dsrc的资源分配的方法、基站和车辆通信终端 - Google Patents

一种控制dsrc的资源分配的方法、基站和车辆通信终端 Download PDF

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Publication number
WO2015131544A1
WO2015131544A1 PCT/CN2014/091000 CN2014091000W WO2015131544A1 WO 2015131544 A1 WO2015131544 A1 WO 2015131544A1 CN 2014091000 W CN2014091000 W CN 2014091000W WO 2015131544 A1 WO2015131544 A1 WO 2015131544A1
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Prior art keywords
dsrc
module
cellular mobile
mobile communication
communication terminal
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PCT/CN2014/091000
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English (en)
French (fr)
Inventor
马洁
Original Assignee
华为技术有限公司
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Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP14884318.8A priority Critical patent/EP3116274B1/en
Publication of WO2015131544A1 publication Critical patent/WO2015131544A1/zh
Priority to US15/256,102 priority patent/US9860875B2/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L15/00—Indicators provided on the vehicle or train for signalling purposes
    • B61L15/0018—Communication with or on the vehicle or train
    • B61L15/0027—Radio-based, e.g. using GSM-R
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
    • G08G1/0108—Measuring and analyzing of parameters relative to traffic conditions based on the source of data
    • G08G1/0112—Measuring and analyzing of parameters relative to traffic conditions based on the source of data from the vehicle, e.g. floating car data [FCD]
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
    • G08G1/0125—Traffic data processing
    • G08G1/0133—Traffic data processing for classifying traffic situation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
    • G08G1/0137—Measuring and analyzing of parameters relative to traffic conditions for specific applications
    • G08G1/0141—Measuring and analyzing of parameters relative to traffic conditions for specific applications for traffic information dissemination
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096708—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control
    • G08G1/096716—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control where the received information does not generate an automatic action on the vehicle control
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096733—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place
    • G08G1/096741—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place where the source of the transmitted information selects which information to transmit to each vehicle
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
    • G08G1/096775—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is a central station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices

Definitions

  • the invention belongs to the field of vehicle networks, and particularly relates to a control dedicated short-range communication (Dedicated Short Range) Communications, DSRC) methods of resource allocation, base stations, and vehicle communication terminals.
  • DSRC dedicated Short Range communication
  • the vehicle network that is, the vehicle interconnection network
  • the vehicles in the vehicle network are equipped with vehicle communication terminals, and the vehicles communicate with each other through the vehicle communication terminal installed on the vehicle to realize communication between the vehicles, thereby realizing interconnection of the vehicles.
  • the United States has developed a vehicle communication terminal using DSRC technology.
  • the vehicle communication terminal of the DSRC technology can then implement wireless communication between vehicles.
  • the frequency spectrum used by DSRC technology is 5.9G.
  • the characteristic of this spectrum is that in the case of line-of-sight transmission, the receiving rate is high within the distance of data transmission. In the case of non-line-of-sight, that is, occlusion, the reception accuracy of data is relatively poor. Therefore, the DSRC technology can achieve better results in the line of sight within 300 meters.
  • the services of the Internet of Vehicles are divided into three categories: the first category: information and entertainment services, the passengers in the car can use the communication network for various entertainment activities; the second category: vehicle efficiency information services, which are provided by the road management department or on the road.
  • the participants released including: road congestion information, road construction information, speed limit of a certain section, weather of a certain section and whether the road can pass, etc.; Vehicle safety information, that is, information to avoid collisions, such as emergency braking on the front, turning in the front, and coming in from the opposite side.
  • the first type of information is usually obtained from the cloud through 3G, 4G and other communication methods, which must use a wide-area network.
  • the second type of information can also use the mobile communication network to publish information in the same way as the first type of information, or use short-range communication technology.
  • roadside When using short-range communication technology, roadside must be installed at a certain density on the road. Unit (Road Side Unit , RSU).
  • RSU Road Side Unit
  • the third type of information because it is the driving information of the vehicle itself, the vehicle is in rapid movement, to achieve the effect of avoiding collision, the communication delay is required to be within 100ms. Since the coverage of the cellular network is too wide, and the process of link establishment is complicated and the delay is difficult to guarantee, it is more suitable to use the technology of vehicle through, such as DSRC technology, to perform communication to complete the transmission of information with a short distance and high latency.
  • DSRC technology is suitable for short-distance through-transmission, but it also has very fatal shortcomings: 1)
  • the physical layer of DSRC is a variable-length frame length, which makes the available resources undeterminable, and some users send big data. When the package is packaged, the available resources are reduced, and the competition situation is intensified. 2)
  • the vehicle communication terminal needs to use the competition process every time it sends a data packet. It is a waste of time for the case that it needs to be sent for a long time or needs to be sent periodically, and the number of competitions is increased.
  • DSRC technology In terms of deployment and use, DSRC technology must require the deployment of RSU to truly realize the purpose of intelligent transportation. The reality is that the depot is reluctant to deploy RSU, and road operators are not willing to deploy RSU because RSU needs to be deployed at a higher density. And maintenance costs are huge, and the current profit model is not clear.
  • the prior art vehicle communication terminal adopts the DSRC technology. Since the physical layer of the DSRC is a variable length frame length, the resource efficiency is low. In addition, the competitive mode leads to a transmission delay in a high-density vehicle scenario. Can not meet the needs of vehicle safety communication.
  • An object of the present invention is to provide a method for controlling resource allocation of a DSRC, a base station, and a vehicle communication terminal, which are intended to solve the problem that the vehicle communication terminal of the prior art adopts the DSRC technology, because the physical layer of the DSRC is a long-length frame length, thereby causing Resource efficiency is low.
  • the way of competition leads to the problem that the transmission delay cannot meet the requirements of safe communication of vehicles under the scene of high-density vehicles.
  • the present invention provides a vehicle communication terminal, which includes a dedicated short-range communication DSRC module and a cellular mobile communication module, and the DSRC module and the cellular mobile communication module are connected through an interface;
  • the DSRC module is configured to wirelessly connect with a DSRC module in another vehicle communication terminal to implement wireless communication between vehicles;
  • the cellular mobile communication module is configured to receive a control message of a base station for resource allocation of the DSRC module, and forward the message to the DSRC module through the interface, and receive the DSRC module to forward the cellular mobile communication module to the cellular mobile communication module by using the interface A resource allocation request message sent to the base station.
  • the interface is a communications management CM interface
  • the interface between the DSRC module and the cellular mobile communication module is specifically: the RRC interface is used to connect the RRC layer of the cellular mobile communication module and the radio resource control-wave RRC-W layer of the DSRC module.
  • the present invention provides a method of controlling resource allocation of a dedicated short-range communication DSRC, the method comprising:
  • the DSRC module and the cellular mobile communication module are included, and the DSRC module and the cellular mobile communication module are connected through an interface.
  • the method further includes:
  • the base station Receiving, by the base station, a resource allocation request message sent by the cellular mobile communication module of the vehicle communication terminal; the resource allocation request message is transmitted by the DSRC module of the vehicle communication terminal to the cellular mobile communication module through the interface;
  • the base station transmits the control message for resource allocation to the DSRC module to the cellular mobile communication module for forwarding by the cellular mobile communication module to the DSRC module through the interface.
  • the parameter of the spectrum of the DSRC specifically includes: a structural parameter of a frame of the DSRC, a vehicle security message type, a resource allocation manner of the DSRC, and a subframe number. Correspondence between the two.
  • the present invention provides a method of controlling resource allocation of a dedicated short-range communication DSRC, the method comprising:
  • the cellular mobile communication module of the vehicle communication terminal receives a parameter of the spectrum of the DSRC broadcasted by the base station to the vehicle communication terminal camped by the cellular mobile communication module to the cell established by the base station;
  • the vehicle communication terminal includes a DSRC module and a cellular mobile communication module, a DSRC module and a cellular
  • the mobile communication modules are connected through an interface;
  • the cellular mobile communication module of the vehicle communication terminal transmits the parameters of the spectrum of the DSRC to the DSRC module through an interface;
  • the DSRC module of the vehicle communication terminal configures the DSRC module according to the parameters of the spectrum of the DSRC.
  • the parameter of the spectrum of the DSRC specifically includes: a structural parameter of a frame of the DSRC, a vehicle security message type, a resource allocation manner of the DSRC, and a subframe number. Correspondence between the two.
  • the cellular mobile communication module of the vehicle communication terminal receives the base station to broadcast the DSRC to the vehicle communication terminal camped in the cell established by the base station
  • the parameters of the spectrum are specifically:
  • the physical layer of the cellular mobile communication module of the vehicle communication terminal receives a parameter that the base station broadcasts the spectrum of the DSRC to the vehicle communication terminal in which the cellular mobile communication module camps to the cell established by the base station.
  • the cellular mobile communication module of the vehicle communication terminal by using the interface, to transmit the parameter of the spectrum of the DSRC to the DSRC module, specifically includes:
  • the physical layer of the cellular mobile communication module of the vehicle communication terminal transmits the parameter of the spectrum of the DSRC to the RRC layer of the Radio Resource Control Protocol;
  • the RRC layer parsing finds that the configuration information of the DSRC module transmits the parameters of the spectrum of the DSRC to the communication management CM interface;
  • the CM interface transmits the parameters of the spectrum of the DSRC to the Radio Resource Control Protocol-wave RRC-w layer of the DSRC module.
  • the DSRC module of the vehicle communication terminal configures the DSRC module according to the parameter of the spectrum of the DSRC, specifically:
  • the RRC-w layer of the DSRC module of the vehicle communication terminal configures the logical link control LLC layer, the medium access control MAC layer and the physical layer of the DSRC module according to the parameters of the spectrum of the DSRC;
  • the RRC-W layer After the configuration is complete, the RRC-W layer returns the configuration completion message to the CM interface.
  • the method further includes:
  • the DSRC module of the vehicle communication terminal transmits messages to other vehicle communication terminals and receives messages transmitted by other vehicle communication terminals.
  • the vehicle communication terminal for the periodic security class message, if the DSRC module of the vehicle communication terminal needs to send a message to other vehicle communication terminals, then the vehicle communication terminal The cellular mobile communication module receives the parameter that the base station broadcasts the spectrum of the DSRC to the vehicle communication terminal in the cell established by the base station to the cellular mobile communication module, and the method further includes:
  • the DSRC module of the vehicle communication terminal transmits the resource allocation request message to the cellular mobile communication module through the interface;
  • the cellular mobile communication module sends the resource allocation request message to the base station, to generate, by the base station, a control message for resource allocation of the DSRC module according to the resource allocation request message;
  • the cellular mobile communication module receives a control message that the base station sends the resource allocation to the DSRC module to the cellular mobile communication module;
  • the cellular mobile communication module is forwarded to the DSRC module through the interface.
  • the present invention provides a base station, where the base station includes:
  • a broadcast module configured to broadcast a parameter of a spectrum of the DSRC to a vehicle communication terminal camped in a cell established by the base station by the cellular mobile communication module, to configure the DSRC module according to a parameter of the spectrum of the DSRC by a DSRC module of the vehicle communication terminal;
  • the vehicle communication terminal includes a DSRC module and a cellular mobile communication module, and the DSRC module and the cellular mobile communication module are connected through an interface.
  • the base station further includes:
  • a first receiving module configured to receive a resource allocation request message sent by a cellular mobile communication module of the vehicle communication terminal; the resource allocation request message is transmitted by the DSRC module of the vehicle communication terminal to the cellular mobile communication module through an interface;
  • a first generating module configured to generate, according to the resource allocation request message, a control message for resource allocation of the DSRC module
  • a first sending module configured to send, to the cellular mobile communication module, the control message for resource allocation of the DSRC module, to be forwarded by the cellular mobile communication module to the DSRC module through the interface.
  • the base station can control the DSRC resources, flexibly adjust the resource configuration parameters, implement DSRC congestion control, and adjust the configuration according to the scenario.
  • FIG. 1 is a schematic structural diagram of a vehicle communication terminal according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic diagram of a protocol stack in a vehicle communication terminal according to Embodiment 1 of the present invention.
  • FIG. 3 is a flowchart of a method for controlling resource allocation of a DSRC according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic diagram of a frame length of a DSRC in a method for controlling resource allocation of a DSRC according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic diagram of a subframe of a DSRC in a method for controlling resource allocation of a DSRC according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic diagram of a physical layer format of a data portion of a subframe of a DSRC in a method for controlling resource allocation of a DSRC according to Embodiment 2 of the present invention.
  • FIG. 7 is a schematic diagram of a preamble portion of a subframe of a DSRC in a method for controlling resource allocation of a DSRC according to Embodiment 2 of the present invention.
  • FIG. 8 is a schematic structural diagram of a preamble portion of a burst subframe in a method for controlling resource allocation of a DSRC according to Embodiment 2 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • a vehicle communication terminal includes a DSRC module 11 and a cellular mobile communication module 12, and the DSRC module 11 and the cellular mobile communication module 12 are connected through an interface 13,
  • the DSRC module 11 is configured to wirelessly connect with the DSRC module in other vehicle communication terminals to implement wireless communication between the vehicles;
  • the cellular mobile communication module 12 is configured to receive a control message of the base station's resource allocation to the DSRC module 11, and pass the The interface 13 forwards to the DSRC module 11, and receives a resource allocation request message that the DSRC module 11 forwards through the interface 13 to the cellular mobile communication module 12 for transmission by the cellular mobile communication module 12 to the base station.
  • the interface 13 may specifically be a CM (communication). Management, communication management) interface.
  • the connection between the DSRC module 11 and the cellular mobile communication module 12 through the interface 13 may be: RRC (Radio) connected to the cellular mobile communication module 12 by using a CM interface.
  • RRC Radio
  • Resource Control, Radio Resource Control Protocol layer and RRC-W of the DSRC module 11 (Radio Resource Control-WAVE, Radio Resource Control - Wave layer.
  • the base station can be LTE ((Long Term) Evolution, Long Term Evolution) base station.
  • the protocol stack division in the vehicle communication terminal provided by the first embodiment of the present invention is as shown in FIG. 2.
  • the base station can control the resources of the DSRC, flexibly adjust the configuration parameters of the resources, implement DSRC congestion control, and adjust the configuration according to the scene. .
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • a method for controlling resource allocation of a DSRC according to Embodiment 2 of the present invention includes the following steps:
  • the base station broadcasts, to the vehicle communication terminal in the cell established by the base station, a parameter of a spectrum of the DSRC to the cellular mobile communication module;
  • the vehicle communication terminal includes a DSRC module and a cellular mobile communication module.
  • the DSRC module and the cellular mobile communication module are connected through an interface; the base station may be a base station of LTE.
  • the parameters of the spectrum of the DSRC may specifically include: a structural parameter of the frame of the DSRC, a type of the vehicle security message, a resource allocation manner of the DSRC, and a correspondence between the subframe numbers.
  • the structure parameters of the frame of the DSRC include: a start time of each frame, a frame length, a number of intraframes in a frame, and a length of a preamble and a length of a data part of each subframe.
  • the frame length of the DSRC is as shown in FIG. 4, the frame length is 100 ms, and there are 400 subframes in one frame.
  • the structure of the subframe is as shown in FIG. 5.
  • time reference references for the start time of each frame there are multiple time reference references for the start time of each frame: one is to use the clock provided by the satellite positioning system, such as GPS Or the timing of the clock provided by the Beidou system. The deviation of this timing is very small and can be on the order of hundreds of nanoseconds. Because the road is usually open-air, it is no problem to receive the clock of the satellite positioning system. Second, in the tunnel or other scenarios where the satellite positioning system signal cannot be received, the timing provided by the base station is used, and the timing generally refers to the timing at which the base station transmits the broadcast channel downlink.
  • the base station broadcasts the system frame number in the broadcast channel, the duration of each system frame is 10 ms, and the downlink time slot Ts of the LTE is 32.6 ns.
  • a method is defined as a starting point of a frame: a certain Ts of a certain subframe in a certain frame, for example, LTE frame number 3 subframe 7 slot 2690.
  • the physical layer format of the data portion of the DSRC subframe is consistent with 802.11p (as shown in Figure 6).
  • the leading part of the DSRC subframe (shown in Figure 7) contains the GP (Guard) Gap, protection interval), GP is to make the communication and conversion of the vehicle communication terminal and the synchronization caused by the timing deviation is not ideal.
  • the blank part in Figure 7 is the GP, the size of the GP is related to the conversion time and the deviation of the synchronization.
  • the duration can be specified by the base station, such as 32us, which usually satisfies the transceiving conversion and synchronization deviation.
  • the vehicle security message type includes a burst security message and a periodic security class message
  • the DSRC resource allocation mode includes a base station pre-allocation mode and a contention mode.
  • 0-10 subframe A security class message for transmitting bursts, and the vehicle communication terminal is obtained in a competitive manner.
  • 11-399 subframe used to send periodic security class messages, and the vehicle communication terminal obtains resources through the base station pre-allocation method.
  • a cellular mobile communication module of a vehicle communication terminal receives a parameter of a spectrum of the DSRC.
  • S102 is specifically:
  • the physical layer of the cellular mobile communication module of the vehicle communication terminal receives parameters of the spectrum of the DSRC.
  • the cellular mobile communication module of the vehicle communication terminal transmits the parameter of the spectrum of the DSRC to the DSRC module through an interface.
  • S103 specifically includes the following steps:
  • the physical layer of the cellular mobile communication module of the vehicle communication terminal transmits the parameters of the spectrum of the DSRC to the RRC layer;
  • the RRC layer parsing discovery is a configuration information of the DSRC module, and transmitting parameters of the spectrum of the DSRC to the CM interface;
  • the CM interface transmits parameters of the spectrum of the DSRC to the RRC-w layer of the DSRC module.
  • the DSRC module of the vehicle communication terminal configures the DSRC module according to the parameter of the spectrum of the DSRC.
  • S104 is specifically:
  • the RRC-w layer of the DSRC module of the vehicle communication terminal configures the LLC of the DSRC module according to the parameters of the spectrum of the DSRC (Logical Link) Control, logical link control) layer, MAC (Media Access Control) layer (ie WAVE in Figure 2) MAC) and physical layer (ie 802.11 PHY in Figure 2);
  • RRC-W The layer returns the configuration completion message to the CM interface.
  • the vehicle communication terminal can perform vehicle direct communication with other vehicle communication terminals.
  • the configured parameters may include, in addition to the structural parameters of the frame of the DSRC described above (for example, the start time of each frame, the frame length, the number of intra frames in one frame, and the length of the leading portion of each subframe and the length of the data portion).
  • the MAC layer uses the priority classification of the security message, whether the LLC layer allows the unpacking group package, and the rules for unpacking the group package.
  • the rules for unpacking the group package include, for example, the maximum number of bytes and the maximum number of retransmissions per packet. Wait.
  • the DSRC module of the vehicle communication terminal sends a message to other vehicle communication terminals and receives a message sent by another vehicle communication terminal.
  • the DSRC module of the vehicle communication terminal receives the message sent by the other vehicle communication terminal according to each subframe.
  • the method further includes the following steps before S101:
  • the DSRC module of the vehicle communication terminal transmits the resource allocation request message to the cellular mobile communication module through the interface; wherein the resource allocation request message carries: a message category (periodic or bursty), For periodic messages, it also carries a specific usage period and the length of time for each use;
  • the cellular mobile communication module sends the resource allocation request message to the base station;
  • the base station generates a control message for resource allocation to the DSRC module according to the resource allocation request message; the content of the control message is carried by the physical layer signaling of the base station or the content carried by the MAC control unit of the base station or the RRC layer message. Period of use, and the length of time each use;
  • the cellular mobile communication module receives the control message for resource allocation to the DSRC module;
  • the cellular mobile communication module is forwarded to the DSRC module through the interface.
  • the DSRC module of the vehicle communication terminal transmitting a message to other vehicle communication terminals includes the following steps:
  • a burst of security class message is transmitted on a burst subframe of a security class message for transmitting a burst defined by a base station in each DSRC frame. For example, the above 0-10 subframe.
  • the preamble portion of the burst subframe for transmitting the burst security class message includes the portion of the snoop probe signal, as shown in FIG.
  • the part of the sounding detection signal is used to listen to the sounding signal. The sender sends a sounding sounding signal in this part to let other users hear the part and then finds that someone is occupied. Other users who want to occupy it do not send subsequent signals.
  • the sender starts sending at this random selection time, such as When A user selects T1 to send and B user selects T3 to send, the B user hears the listening detection signal sent by A user before sending, so the subsequent transmission is stopped. Through this process, resource preemption is achieved;
  • burst security message does not grab resources in a burst subframe within a frame, it can be sent on a periodic resource;
  • Periodic security class messages may be dropped when the total packet length of the bursty security class message and the periodic security class message exceeds the allowed message length of the periodic channel.
  • a periodic security-type message is discarded multiple times in a row, the priority of the periodic security-type message becomes higher, and the burst-type security-type message cannot occupy the resources of the periodic security-type message. For example, if a periodic security-type message is discarded three times in a row, even if a bursty security-type message cannot be sent in a burst subframe, the resource of the periodic security-type message cannot be squeezed; at this time, the DSRC module passes the cell.
  • the mobile communication module sends a DSRC resource adjustment request message to the base station, where the MAC layer of the DSRC module triggers a message that the channel status is busy to be transmitted to the RRC-W layer, and the RRC-W layer transmits the message that the channel status is busy to the CM interface;
  • the CM interface triggers the RRC layer of the cellular mobile communication module to generate a DSRC resource adjustment request message; the physical layer of the cellular mobile communication module sends a DSRC resource adjustment request message to the base station;
  • the base station receives the DSRC resource adjustment request message
  • the base station determines whether to adjust the DSRC resource according to the number or frequency of the received DSRC resource adjustment request message, and the adjustment method is to increase the number of burst subframes for transmitting the burst security type message;
  • the base station If the adjustment is decided, the base station notifies the adjusted condition of the DSRC resource by broadcast signaling, and the effective time.
  • the base station can control the resources of the DSRC, flexibly adjust the configuration parameters of the resources, implement DSRC congestion control, and adjust the configuration according to the scene. .
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the base station provided in Embodiment 3 of the present invention includes:
  • a broadcast module configured to broadcast a parameter of a spectrum of the DSRC to a vehicle communication terminal camped in a cell established by the base station by the cellular mobile communication module, to configure the DSRC module according to a parameter of the spectrum of the DSRC by a DSRC module of the vehicle communication terminal;
  • the vehicle communication terminal includes a DSRC module and a cellular mobile communication module, and the DSRC module and the cellular mobile communication module are connected through an interface.
  • the base station further includes:
  • a first receiving module configured to receive a resource allocation request message sent by a cellular mobile communication module of the vehicle communication terminal; the resource allocation request message is transmitted by the DSRC module of the vehicle communication terminal to the cellular mobile communication module through an interface;
  • a first generating module configured to generate, according to the resource allocation request message, a control message for resource allocation of the DSRC module
  • a first sending module configured to send, to the cellular mobile communication module, the control message for resource allocation of the DSRC module, to be forwarded by the cellular mobile communication module to the DSRC module through the interface.

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Abstract

本发明适用于车辆网领域，提供了一种控制DSRC的资源分配的方法、基站和车辆通信终端。所述车辆通信终端包括专用短程通讯DSRC模块和蜂窝移动通信模块，所述DSRC模块和蜂窝移动通信模块之间通过接口连接；所述DSRC模块用于与其他车辆通信终端中的DSRC模块无线连接，实现车辆之间的无线通信；所述蜂窝移动通信模块用于接收基站对DSRC模块的资源分配的控制消息，并通过所述接口转发给DSRC模块，及接收DSRC模块通过所述接口转发给蜂窝移动通信模块以由蜂窝移动通信模块发送给基站的资源分配请求消息。本发明能够实现基站控制DSRC的资源，灵活调整资源的配置参数，能实现DSRC的拥塞控制，且可根据场景调整配置。

Description

一种控制DSRC的资源分配的方法、基站和车辆通信终端 技术领域
本发明属于车辆网领域，尤其涉及一种控制专用短程通讯（Dedicated Short Range Communications ，DSRC）的资源分配的方法、基站和车辆通信终端。
 背景技术
车辆网，即车辆互联网络，车辆网中的车辆均安装了车辆通信终端，车辆之间通过安装在车辆上的车辆通信终端利用移动通讯网络实现车辆之间的通讯，实现车辆的互联。美国开发了采用DSRC技术的车辆通信终端，车辆安装了采用 DSRC技术的车辆通信终端之后可以实现车辆之间的无线通信。
DSRC技术使用的频点为5.9G的频谱，这种频谱的特性是在视距的传输情况下，数据传输的距离范围内，接收正确率高。在非视距，即有遮挡的情况下，数据的接收正确性比较差。因此DSRC技术在300米范围内的视距使用能够取得较好的效果。
车联网的服务分为3类：第一类：信息娱乐服务，车中的客人可以使用通讯网络进行各种娱乐活动；第二类：车辆效率类信息服务，这些信息由道路管理部门或者路上的参与者发布，主要包括：道路的拥堵信息，道路的施工信息，某路段限速，某路段的天气以及路面是否可通行等信息；第三类： 车辆安全信息，即避免碰撞的信息，例如前车紧急刹车，前车转弯，对面有来车等。第一类信息通常通过3G，4G等通讯方式从云端获取，这必须要使用广域覆盖的网络。第二类信息，也可以使用和第一类信息相同的方式使用移动通讯网络来进行信息的发布，也可以使用短程通讯技术，使用短程通讯技术的时候必须在道路上以一定的密度安装路边单元（Road Side Unit ，RSU）。第三类信息，由于是车辆自身的行驶信息，车辆都是在快速移动中，要达到避免碰撞的效果，通讯时延要求在100ms之内。蜂窝网络由于覆盖太广，而且链路建立的过程比较复杂，时延难以保证，所以比较适合使用车辆直通的技术，例如DSRC技术，进行通讯来完成距离较短时延要求高的信息发送。
DSRC技术虽然适于短距离的直通传输,但是也有着非常致命的缺点：1）DSRC的物理层是变长的帧长，会让可以使用的资源变得不可确定，在有的用户发送大数据包的时候，让可用资源减少，使竞争情形加剧。 2）车辆通信终端每次发送一个数据包都需要使用竞争过程，对于需要长期发送或者需要定期发送的情况，都是很浪费时间的，而且增加了竞争的次数。
对于时延要求高的车辆安全消息，业界认为应该是保证传输时延在100ms之内，实际链路仿真和测试结果表明在一定区域内超过160辆车之后，一个车辆安全消息的传输时延远大于100ms。
在部署使用方面，DSRC技术必须需要RSU的部署，才能真正实现智能交通的目的，现实却是车厂不愿意部署RSU，道路运营商也不愿意部署RSU，因为RSU需要部署的密度比较高，初装和维护费用巨大，而且目前看到盈利模式不清晰。
综上所述，现有技术的车辆通信终端采用DSRC技术，由于DSRC的物理层是变长的帧长，因此导致资源效率低，另外，竞争的方式导致高密度车辆的场景下，传输时延不能满足车辆安全通信的需求。
 技术问题
本发明的目的在于提供一种控制DSRC的资源分配的方法、基站和车辆通信终端，旨在解决现有技术的车辆通信终端采用DSRC技术，由于DSRC的物理层是变长的帧长，因此导致资源效率低，另外，竞争的方式导致高密度车辆的场景下，传输时延不能满足车辆安全通信的需求的问题。
 技术解决方案
第一方面，本发明提供了一种车辆通信终端，所述车辆通信终端包括专用短程通讯DSRC模块和蜂窝移动通信模块，所述DSRC模块和蜂窝移动通信模块之间通过接口连接；
所述DSRC模块用于与其他车辆通信终端中的DSRC模块无线连接，实现车辆之间的无线通信；
所述蜂窝移动通信模块用于接收基站对DSRC模块的资源分配的控制消息，并通过所述接口转发给DSRC模块，及接收DSRC模块通过所述接口转发给蜂窝移动通信模块以由蜂窝移动通信模块发送给基站的资源分配请求消息。
结合第一方面，在第一方面的第一种可能的实现方式中，所述接口是通讯管理CM接口；
所述DSRC模块和蜂窝移动通信模块之间通过接口连接具体是：采用CM接口连接蜂窝移动通信模块的无线资源控制协议RRC层与DSRC模块的无线资源控制-波RRC-W层。
第二方面，本发明提供了一种控制专用短程通讯DSRC的资源分配的方法，所述方法包括：
基站向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数，以由车辆通信终端的DSRC模块根据所述DSRC的频谱的参数配置DSRC模块；所述车辆通信终端包括DSRC模块和蜂窝移动通信模块，DSRC模块和蜂窝移动通信模块之间通过接口连接。
结合第二方面，在第二方面的第一种可能的实现方式中，对于周期性的安全类消息，如果车辆通信终端的DSRC模块需要向其他车辆通信终端发送消息,则在所述基站向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数之前，所述方法还包括：
基站接收车辆通信终端的蜂窝移动通信模块发送的资源分配请求消息；所述资源分配请求消息是由车辆通信终端的DSRC模块通过接口传输给蜂窝移动通信模块的；
基站根据所述资源分配请求消息生成对DSRC模块的资源分配的控制消息；
基站向蜂窝移动通信模块发送所述对DSRC模块的资源分配的控制消息，以由蜂窝移动通信模块通过所述接口转发给DSRC模块。
结合第二方面，在第二方面的第二种可能的实现方式中，所述DSRC的频谱的参数具体包括：DSRC的帧的结构参数以及车辆安全消息类型、DSRC的资源分配方式和子帧号之间的对应关系。
第三方面，本发明提供了一种控制专用短程通讯DSRC的资源分配的方法，所述方法包括：
车辆通信终端的蜂窝移动通信模块接收基站向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数；车辆通信终端包括DSRC模块和蜂窝移动通信模块，DSRC模块和蜂窝移动通信模块之间通过接口连接；
车辆通信终端的蜂窝移动通信模块通过接口将所述DSRC的频谱的参数传输给DSRC模块；
车辆通信终端的DSRC模块根据所述DSRC的频谱的参数配置DSRC模块。
结合第三方面，在第三方面的第一种可能的实现方式中，所述DSRC的频谱的参数具体包括：DSRC的帧的结构参数以及车辆安全消息类型、DSRC的资源分配方式和子帧号之间的对应关系。
结合第三方面，在第三方面的第二种可能的实现方式中，所述车辆通信终端的蜂窝移动通信模块接收基站向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数具体为：
车辆通信终端的蜂窝移动通信模块的物理层接收基站向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数。
结合第三方面，在第三方面的第三种可能的实现方式中，所述车辆通信终端的蜂窝移动通信模块通过接口将所述DSRC的频谱的参数传输给DSRC模块具体包括：
车辆通信终端的蜂窝移动通信模块的物理层将所述DSRC的频谱的参数传送给无线资源控制协议RRC层；
RRC层解析发现是DSRC模块的配置信息，则将所述DSRC的频谱的参数传送到通讯管理CM接口；
CM接口将所述DSRC的频谱的参数传输给DSRC模块的无线资源控制协议-波 RRC-w层。
结合第三方面，在第三方面的第四种可能的实现方式中，所述车辆通信终端的DSRC模块根据所述DSRC的频谱的参数配置DSRC模块具体为：
车辆通信终端的DSRC模块的RRC-w层根据所述DSRC的频谱的参数配置DSRC模块的逻辑链路控制LLC层、媒体接入控制MAC层和物理层；
配置完成后，RRC-W 层返回配置完成的消息给CM接口。
结合第三方面，在第三方面的第五种可能的实现方式中，所述车辆通信终端的DSRC模块根据所述DSRC的频谱的参数配置DSRC模块之后，所述方法还包括：
车辆通信终端的DSRC模块向其他车辆通信终端发送消息和接收其他车辆通信终端发送的消息。
结合第三方面，在第三方面的第六种可能的实现方式中，对于周期性的安全类消息，如果车辆通信终端的DSRC模块需要向其他车辆通信终端发送消息，则在所述车辆通信终端的蜂窝移动通信模块接收基站向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数之前，所述方法还包括：
车辆通信终端的DSRC模块通过接口将资源分配请求消息传输给蜂窝移动通信模块；
蜂窝移动通信模块将所述资源分配请求消息发送给基站，以由基站根据所述资源分配请求消息生成对DSRC模块的资源分配的控制消息；
蜂窝移动通信模块接收基站向蜂窝移动通信模块发送所述对DSRC模块的资源分配的控制消息；
蜂窝移动通信模块通过所述接口转发给DSRC模块。
第四方面，本发明提供了一种基站，所述基站包括：
广播模块，用于向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数，以由车辆通信终端的DSRC模块根据所述DSRC的频谱的参数配置DSRC模块；所述车辆通信终端包括DSRC模块和蜂窝移动通信模块，DSRC模块和蜂窝移动通信模块之间通过接口连接。
结合第四方面，在第四方面的第一种可能的实现方式中，对于周期性的安全类消息，如果车辆通信终端的DSRC模块需要向其他车辆通信终端发送消息，则所述基站还包括：
第一接收模块，用于接收车辆通信终端的蜂窝移动通信模块发送的资源分配请求消息；所述资源分配请求消息是由车辆通信终端的DSRC模块通过接口传输给蜂窝移动通信模块的；
第一生成模块，用于根据所述资源分配请求消息生成对DSRC模块的资源分配的控制消息；
第一发送模块，用于向蜂窝移动通信模块发送所述对DSRC模块的资源分配的控制消息，以由蜂窝移动通信模块通过所述接口转发给DSRC模块。
 有益效果
在本发明中，由于车辆通信终端包括DSRC模块和蜂窝移动通信模块，因此能够实现基站控制DSRC的资源，灵活调整资源的配置参数，能实现DSRC的拥塞控制，且可根据场景调整配置。
 附图说明
图1是本发明实施例一提供的车辆通信终端结构示意图。
图2是本发明实施例一提供的车辆通信终端中的协议栈示意图。
图3是本发明实施例二提供的控制DSRC的资源分配的方法流程图。
图4是本发明实施例二提供的控制DSRC的资源分配的方法中，DSRC的帧长示意图。
图5是本发明实施例二提供的控制DSRC的资源分配的方法中，DSRC的子帧示意图。
图6是本发明实施例二提供的控制DSRC的资源分配的方法中，DSRC的子帧的数据部分的物理层格式示意图。
图7是本发明实施例二提供的控制DSRC的资源分配的方法中，DSRC的子帧的前导部分示意图。
图8是本发明实施例二提供的控制DSRC的资源分配的方法中，突发子帧的前导部分的结构示意图。
 本发明的实施方式
为了使本发明的目的、技术方案及有益效果更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
为了说明本发明所述的技术方案，下面通过具体实施例来进行说明。
实施例一：
请参阅图1，本发明实施例一提供的车辆通信终端包括DSRC模块11和蜂窝移动通信模块12，DSRC模块11和蜂窝移动通信模块12之间通过接口13连接，所述 DSRC模块11用于与其他车辆通信终端中的DSRC模块无线连接，实现车辆之间的无线通信；所述蜂窝移动通信模块12用于接收基站对DSRC模块11的资源分配的控制消息，并通过所述接口13转发给DSRC模块11，及接收DSRC模块11通过所述接口13转发给蜂窝移动通信模块12以由蜂窝移动通信模块12发送给基站的资源分配请求消息。
在本发明实施例一中，接口13具体可以是CM（communication management，通讯管理）接口。所述DSRC模块11和蜂窝移动通信模块12间通过接口13连接具体可以是：采用CM接口连接蜂窝移动通信模块12的RRC（Radio Resource Control，无线资源控制协议）层与DSRC模块11的RRC-W（Radio Resource Control-WAVE，无线资源控制-波）层。基站可以是LTE（(Long Term Evolution，长期演进）的基站。本发明实施例一提供的车辆通信终端中的协议栈划分如图2所示。
在本发明实施例一中，由于车辆通信终端包括DSRC模块和蜂窝移动通信模块，因此能够实现基站控制DSRC的资源，灵活调整资源的配置参数,能实现DSRC的拥塞控制，且可根据场景调整配置。
实施例二：
请参阅图3，本发明实施例二提供的控制DSRC的资源分配的方法包括以下步骤：
S101、基站向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数；
在本发明实施例二中，车辆通信终端包括DSRC模块和蜂窝移动通信模块， DSRC模块和蜂窝移动通信模块之间通过接口连接；基站可以是LTE的基站。
DSRC的频谱的参数具体可以包括：DSRC的帧的结构参数以及车辆安全消息类型、DSRC的资源分配方式和子帧号之间的对应关系等。其中，DSRC的帧的结构参数包括：每帧的开始时间、帧长、一个帧内子帧的个数和每个子帧的前导部分（preamble）的长度与数据部分的长度。
DSRC的帧长如图4所示，帧长为100ms，一个帧内有400个子帧，子帧的结构如图5所示。
每帧的开始时间有多种时间参考基准：一是使用卫星定位系统提供的时钟，例如GPS 或者北斗系统提供的时钟定时，这种定时的偏差非常小，可以几百纳秒的量级，因为道路通常是露天的，接收卫星定位系统的时钟是没有问题的。 二是在隧道中或者其他不能接收卫星定位系统信号的场景，使用基站提供的定时，定时通常是指基站下行发送广播信道的定时。
每帧的开始时间的表示方法举例说明如下：
使用卫星定位系统提供的时钟时：假设卫星定位系统能够提供的精度为100ns，表示时间的位数为12位十进制的数，即10^12*0.1us = 10^11us，规定某一个时刻为帧的开始点，即 000000000000 时刻 A 模 100ms 为1us 的时刻为每帧的开始时刻。
使用基站下行发送广播信道的定时时：基站在广播信道中会广播系统帧号，每个系统帧的时长为10ms，LTE的下行每个时隙Ts为32.6ns, 规定某个时刻为帧的开始点方法：某帧中某子帧的某Ts，例如LTE帧号3 子帧7 时隙 2690。
DSRC的子帧的数据部分的物理层格式与802.11p是一致的（如图6所示）。 DSRC的子帧的前导部分（如图7所示）包含GP（Guard Gap，保护间隔），GP是为了让车辆通信终端进行收发转换以及容纳定时偏差导致的同步不理想，图7中的空白部分就是GP，GP的大小和转换时间以及同步的偏差有关，预留的时长可以由基站规定，比如32us，通常能够满足收发转换和同步偏差。
在本发明实施例二中，车辆安全消息类型包括突发的安全类消息和周期性的安全类消息，DSRC的资源分配方式包括基站预分配方式和竞争方式。车辆安全消息类型、DSRC的资源分配方式和消息发送的子帧号之间的对应关系举例说明如下：
0-10子帧：用于发送突发的安全类消息，车辆通信终端采用竞争方式获得。
11-399子帧：用于发送周期性的安全类消息，车辆通信终端获得资源是通过基站预分配方式获得。
S102、车辆通信终端的蜂窝移动通信模块接收所述DSRC的频谱的参数；
在本发明实施例二中，S102具体为：
车辆通信终端的蜂窝移动通信模块的物理层（即图2中的cellular PHY）接收所述DSRC的频谱的参数。
S103、车辆通信终端的蜂窝移动通信模块通过接口将所述DSRC的频谱的参数传输给DSRC模块；
在本发明实施例二中，S103具体包括以下步骤：
车辆通信终端的蜂窝移动通信模块的物理层将所述DSRC的频谱的参数传送给RRC层；
RRC层解析发现是DSRC模块的配置信息，则将所述DSRC的频谱的参数传送到CM接口；
CM接口将所述DSRC的频谱的参数传输给DSRC模块的RRC-w层。
S104、车辆通信终端的DSRC模块根据所述DSRC的频谱的参数配置DSRC模块。
在本发明实施例二中，S104具体为：
车辆通信终端的DSRC模块的RRC-w层根据所述DSRC的频谱的参数配置DSRC模块的LLC（Logical Link Control，逻辑链路控制）层、MAC（Media Access Control，媒体接入控制）层（即图2中的WAVE MAC）和物理层（即图2中的802.11PHY ）；
配置完成后，RRC-W 层返回配置完成的消息给CM接口，配置完成后，车辆通信终端就可以跟其他车辆通信终端进行车辆直通的通信了。
配置的参数除了上述的DSRC的帧的结构参数（例如每帧的开始时间、帧长、一个帧内子帧的个数和每个子帧的前导部分的长度与数据部分的长度）外，还可以包括：MAC层对于安全消息使用的优先级分类、LLC层是否允许拆包组包、拆包组包的规则等，拆包组包的规则比如包括每个包最大的字节数和最大重传次数等。
在本发明实施例二中，S104之后还可以包括以下步骤：
S105、车辆通信终端的DSRC模块向其他车辆通信终端发送消息和接收其他车辆通信终端发送的消息。
其中，车辆通信终端的DSRC模块接收其他车辆通信终端发送的消息是按照每个子帧进行接收。
对于周期性的安全类消息，如果车辆通信终端的DSRC模块需要向其他车辆通信终端发送消息，则在S101之前，所述方法还包括以下步骤：
车辆通信终端的DSRC模块通过接口将资源分配请求消息传输给蜂窝移动通信模块；其中，资源分配请求消息中携带：消息类别（周期性或者突发性）、 对于周期性的消息，还携带具体的使用周期以及每次使用的时间长度；
蜂窝移动通信模块将所述资源分配请求消息发送给基站；
基站接收蜂窝移动通信模块发送的所述资源分配请求消息；
基站根据所述资源分配请求消息生成对DSRC模块的资源分配的控制消息；所述控制消息的内容是通过基站的物理层信令或者基站的MAC控制单元或者RRC层消息携带的内容，携带了资源的使用周期，以及每次使用的时间长度；
基站向蜂窝移动通信模块发送所述对DSRC模块的资源分配的控制消息；
蜂窝移动通信模块接收所述对DSRC模块的资源分配的控制消息；
蜂窝移动通信模块通过所述接口转发给DSRC模块。
对于突发的安全类消息，所述车辆通信终端的DSRC模块向其他车辆通信终端发送消息包括以下步骤：
在每个DSRC帧中的由基站定义的用于发送突发的安全类消息的突发子帧上发送突发的安全类消息。例如上述的0-10子帧。用于发送突发的安全类消息的突发子帧的前导部分包括侦听探测信号部分，如图8所示。侦听探测信号部分用来侦听探测信号，发送者在这部分发送侦听探测信号以便让其他用户听到这一段之后发现有人占用，其他想占用的用户则退避不发送后续的信号。发送者在这一段随机选时间开始发送，如 A 用户选择T1时发送，B用户选择T3时发送，则B用户在发送之前就听到A用户发送的侦听探测信号，因此停止后续的发送。通过这个过程就实现了资源抢占；
如果突发的安全消息在一个帧内的突发子帧没有抢到资源，就可以在周期性的资源上进行发送；
在突发的安全类消息和周期性的安全类消息的总包长超过周期性信道的允许的消息长度时，可能会丢弃周期性的安全类消息。当周期性的安全类消息连续多次被丢弃之后，周期性的安全类消息的优先级就会变高，突发的安全类消息不能挤占周期性的安全类消息的资源了。例如周期性的安全类消息连续3次被丢弃，则即使突发的安全类消息在突发子帧内不能得到发送，也不能挤占周期性的安全类消息的资源；此时，DSRC模块通过蜂窝移动通信模块向基站发送DSRC资源调整请求消息，具体为：DSRC模块的MAC层会触发信道状态忙的消息传送给RRC-W层，RRC-W层将该信道状态忙的消息传送给CM接口；CM接口触发蜂窝移动通信模块的RRC层生成DSRC资源调整请求消息；蜂窝移动通信模块的物理层将DSRC资源调整请求消息发送到基站；
基站接收DSRC资源调整请求消息；
基站根据接收到的DSRC资源调整请求消息的个数或者频繁程度，决定是否调整DSRC资源，调整方法是增多用于发送突发的安全类消息的突发子帧的个数；
如果决定调整，则基站通过广播信令通知DSRC资源的调整后的情况，以及生效时间。
在本发明实施例二中，由于车辆通信终端包括DSRC模块和蜂窝移动通信模块，因此能够实现基站控制DSRC的资源，灵活调整资源的配置参数,能实现DSRC的拥塞控制，且可根据场景调整配置。
实施例三：
本发明实施例三提供的基站包括：
广播模块，用于向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数，以由车辆通信终端的DSRC模块根据所述DSRC的频谱的参数配置DSRC模块；所述车辆通信终端包括DSRC模块和蜂窝移动通信模块，DSRC模块和蜂窝移动通信模块之间通过接口连接。
在本发明实施例三中，对于周期性的安全类消息，如果车辆通信终端的DSRC模块需要向其他车辆通信终端发送消息，则所述基站还包括：
第一接收模块，用于接收车辆通信终端的蜂窝移动通信模块发送的资源分配请求消息；所述资源分配请求消息是由车辆通信终端的DSRC模块通过接口传输给蜂窝移动通信模块的；
第一生成模块，用于根据所述资源分配请求消息生成对DSRC模块的资源分配的控制消息；
第一发送模块，用于向蜂窝移动通信模块发送所述对DSRC模块的资源分配的控制消息，以由蜂窝移动通信模块通过所述接口转发给DSRC模块。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，所述的程序可以存储于一计算机可读取存储介质中，所述的存储介质，如ROM/RAM、磁盘、光盘等。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (14)

  1. 一种车辆通信终端，其特征在于，所述车辆通信终端包括专用短程通讯DSRC模块和蜂窝移动通信模块，所述DSRC模块和蜂窝移动通信模块之间通过接口连接；
    所述DSRC模块用于与其他车辆通信终端中的DSRC模块无线连接，实现车辆之间的无线通信；
    所述蜂窝移动通信模块用于接收基站对DSRC模块的资源分配的控制消息，并通过所述接口转发给DSRC模块，及接收DSRC模块通过所述接口转发给蜂窝移动通信模块以由蜂窝移动通信模块发送给基站的资源分配请求消息。
  2. 如权利要求1所述的车辆通信终端，其特征在于，所述接口是通讯管理CM接口；
    所述DSRC模块和蜂窝移动通信模块之间通过接口连接具体是：采用CM接口连接蜂窝移动通信模块的无线资源控制协议RRC层与 DSRC模块的无线资源控制-波RRC-W层。
  3. 一种控制专用短程通讯DSRC的资源分配的方法，其特征在于，所述方法包括：
    基站向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数，以由车辆通信终端的DSRC模块根据所述DSRC的频谱的参数配置DSRC模块；所述车辆通信终端包括DSRC模块和蜂窝移动通信模块，DSRC模块和蜂窝移动通信模块之间通过接口连接。
  4. 如权利要求3所述的方法，其特征在于，对于周期性的安全类消息，如果车辆通信终端的DSRC模块需要向其他车辆通信终端发送消息，则在所述基站向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数之前，所述方法还包括：
    基站接收车辆通信终端的蜂窝移动通信模块发送的资源分配请求消息；所述资源分配请求消息是由车辆通信终端的DSRC模块通过接口传输给蜂窝移动通信模块的；
    基站根据所述资源分配请求消息生成对DSRC模块的资源分配的控制消息；
    基站向蜂窝移动通信模块发送所述对DSRC模块的资源分配的控制消息，以由蜂窝移动通信模块通过所述接口转发给DSRC模块。
  5. 如权利要求3或4所述的方法，其特征在于,所述DSRC的频谱的参数具体包括：DSRC的帧的结构参数以及车辆安全消息类型、 DSRC的资源分配方式和子帧号之间的对应关系。
  6. 一种控制专用短程通讯DSRC的资源分配的方法，其特征在于，所述方法包括：
    车辆通信终端的蜂窝移动通信模块接收基站向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数；车辆通信终端包括DSRC模块和蜂窝移动通信模块，DSRC模块和蜂窝移动通信模块之间通过接口连接；
    车辆通信终端的蜂窝移动通信模块通过接口将所述DSRC的频谱的参数传输给DSRC模块；
    车辆通信终端的DSRC模块根据所述DSRC的频谱的参数配置 DSRC模块。
  7. 如权利要求6所述的方法，其特征在于，所述DSRC的频谱的参数具体包括：DSRC的帧的结构参数以及车辆安全消息类型、DSRC的资源分配方式和子帧号之间的对应关系。
  8. 如权利要求6或7所述的方法，其特征在于，所述车辆通信终端的蜂窝移动通信模块接收基站向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数具体为：
    车辆通信终端的蜂窝移动通信模块的物理层接收基站向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数。
  9. 如权利要求6至8任一项所述的方法，其特征在于，所述车辆通信终端的蜂窝移动通信模块通过接口将所述DSRC的频谱的参数传输给DSRC模块具体包括：
    车辆通信终端的蜂窝移动通信模块的物理层将所述DSRC的频谱的参数传送给无线资源控制协议RRC层；
    RRC层解析发现是DSRC模块的配置信息，则将所述DSRC的频谱的参数传送到通讯管理CM接口；
    CM接口将所述DSRC的频谱的参数传输给DSRC模块的无线资源控制协议-波RRC-w层。
  10. 如权利要求6至9任一项所述的方法，其特征在于，所述车辆通信终端的DSRC模块根据所述DSRC的频谱的参数配置DSRC模块具体为：
    车辆通信终端的DSRC模块的RRC-w层根据所述DSRC的频谱的参数配置DSRC模块的逻辑链路控制LLC层、媒体接入控制MAC层和物理层；
    配置完成后，RRC-W 层返回配置完成的消息给CM接口。
  11. 如权利要求6至10任一项所述的方法，其特征在于，所述车辆通信终端的DSRC模块根据所述DSRC的频谱的参数配置DSRC模块之后，所述方法还包括：
    车辆通信终端的DSRC模块向其他车辆通信终端发送消息和接收其他车辆通信终端发送的消息。
  12. 如权利要求6至11任一项所述的方法，其特征在于，对于周期性的安全类消息，如果车辆通信终端的DSRC模块需要向其他车辆通信终端发送消息，则在所述车辆通信终端的蜂窝移动通信模块接收基站向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数之前，所述方法还包括：
    车辆通信终端的DSRC模块通过接口将资源分配请求消息传输给蜂窝移动通信模块；
    蜂窝移动通信模块将所述资源分配请求消息发送给基站，以由基站根据所述资源分配请求消息生成对DSRC模块的资源分配的控制消息；
    蜂窝移动通信模块接收基站向蜂窝移动通信模块发送所述对DSRC模块的资源分配的控制消息；
    蜂窝移动通信模块通过所述接口转发给DSRC模块。
  13. 一种基站，其特征在于，所述基站包括：
    广播模块，用于向蜂窝移动通信模块驻留到基站建立的小区内的车辆通信终端广播DSRC的频谱的参数,以由车辆通信终端的DSRC模块根据所述DSRC的频谱的参数配置DSRC模块；所述车辆通信终端包括DSRC模块和蜂窝移动通信模块，DSRC模块和蜂窝移动通信模块之间通过接口连接。
  14. 如权利要求13所述的基站，其特征在于，对于周期性的安全类消息，如果车辆通信终端的DSRC模块需要向其他车辆通信终端发送消息，则所述基站还包括：
    第一接收模块，用于接收车辆通信终端的蜂窝移动通信模块发送的资源分配请求消息；所述资源分配请求消息是由车辆通信终端的DSRC模块通过接口传输给蜂窝移动通信模块的；
    第一生成模块，用于根据所述资源分配请求消息生成对DSRC模块的资源分配的控制消息；
    第一发送模块，用于向蜂窝移动通信模块发送所述对DSRC模块的资源分配的控制消息，以由蜂窝移动通信模块通过所述接口转发给DSRC模块。
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