WO2017133624A1 - 车联网通信v2x消息的广播方法及装置、mbms承载的建立方法 - Google Patents

车联网通信v2x消息的广播方法及装置、mbms承载的建立方法 Download PDF

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Publication number
WO2017133624A1
WO2017133624A1 PCT/CN2017/072661 CN2017072661W WO2017133624A1 WO 2017133624 A1 WO2017133624 A1 WO 2017133624A1 CN 2017072661 W CN2017072661 W CN 2017072661W WO 2017133624 A1 WO2017133624 A1 WO 2017133624A1
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Prior art keywords
message
cell
broadcast
mbms
mbms bearer
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PCT/CN2017/072661
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English (en)
French (fr)
Inventor
罗薇
陈琳
马子江
吴蕴璐
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中兴通讯股份有限公司
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Publication of WO2017133624A1 publication Critical patent/WO2017133624A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/52—Network services specially adapted for the location of the user terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12—Messaging; Mailboxes; Announcements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communications, and in particular to a method and device for broadcasting a car network communication V2X message, and a method for establishing an MBMS bearer.
  • V2X Vehicle-to-Everything Communications
  • V2X Vehicle-to-Everything Communications
  • V2V Vehicle-to-Everything Communications
  • V2P Vehicle-to-Pedestrian Communications
  • V2I Vehicle-to-Infrastructure Communications
  • V2I Vehicle-to-Network Communications
  • V2I Vehicle-to-Network Communications
  • the V2X service is a communication service that transmits through 3GPP with the participation of the transmitting or receiving UE using the V2V application. Based on the other party participating in the communication, the V2X service can be further divided into a V2V service, a V2I service, a V2P service, and a V2N service.
  • the V2P service refers to a service that uses V2P application communication between UEs.
  • the V2I service refers to a service in which a UE and a Road Side Unit (RSU) use a V2I application to interact.
  • RSU Road Side Unit
  • the RSU is an entity that supports V2I services, and can send V2I services to UEs that use V2I applications, or can receive V2I services from UEs that use V2I services.
  • the RSU can be implemented by a base station (eNB) or a stationary UE. If the RSU is implemented by a base station, it is called an eNB type RSU. If the RSU is implemented by the UE, it is called a UE type RSU.
  • FIG. 1 is a schematic diagram of a V2V service scenario according to the related art of the present invention, as shown in FIG.
  • This scenario supports V2V communication based solely on the PC5 interface.
  • the UE sends a V2X message to multiple UEs in the local area through the PC5 interface.
  • scenario 2 the scenario supports V2V communication based only on the Uu port.
  • the UE uplinks the V2X message to the E-UTRAN, and the E-UTRAN broadcasts the V2X message to the multiple UEs in the local area.
  • the scenario supports V2V communication using the Uu and PC5 interfaces.
  • the UE sends a V2X message to the other UEs through the PC5 interface, where 3a: the UE type RSU transmits the V2X message to the E-UTRAN after receiving the V2X message from the PC5 interface, and the E-UTRAN receives the V2X from the UE type RSU.
  • the message is downlink broadcasted to multiple UEs in the local area.
  • 3b The UE uplinks the V2X message to the E-UTRAN.
  • the E-UTRAN After receiving the V2X message from the Uu port, the E-UTRAN transmits the V2X message to one or more UE type RSUs, and the UE type RSU receives the V2X from the E-UTRAN.
  • the message is sent to multiple UEs in the local area through the PC5 interface.
  • the 3rd Generation Partnership Project (3GPP) proposes a Multimedia Broadcast Multicast Service (MBMS), which is a data source from a data source.
  • MBMS Multimedia Broadcast Multicast Service
  • the technology of transmitting data by the target mobile terminal realizes sharing of resources of the network (including the core network and the access network), and improves the utilization of network resources (especially air interface resources).
  • the MBMS transmission mode before 3GPP R13 refers to MBMSN mode transmission (MBMS single frame network), that is, multiple cells transmit the same content at the same time.
  • both the scenario 2 and the scenario 3 require the E-UTRAN to downlink the V2X message to multiple UEs in the local area. Therefore, the existing discussion considers MBMS to be the best use.
  • the mechanism for broadcasting V2X messages The mechanism for broadcasting V2X messages.
  • the network side includes V2X AS (V2X Application Server, V2X Application Server, also called: AS (Application Server), V2X Server (V2X Server), V2X Application Layer (V2X Application Layer), and V2X AS is the content of V2X service.
  • V2X AS is the content of V2X service.
  • Provider BM-SC (Broadcast-Multicast-Service Centre) and/or 3GPP core network, and its RAN access network element (eg, eNB).
  • the network side can establish an MBMS bearer for each V2X service type, corresponding to an MBMS radio access bearer (MBMS radio access bearer) and assign a specific TMGI (Temporary Mobile Group Identity).
  • MBMS radio access bearer MBMS radio access bearer
  • TMGI Temporal Mobile Group Identity
  • the V2X AS divides the V2X service into several V2X service types, and each V2X service type corresponds to one TMGI.
  • the BM-SC needs to establish a separate MBMS bearer for each TMGI. That is to say, each V2X service type needs to establish a separate MBMS bearer, that is, each TMGI corresponds to one V2X service type corresponding to one MBMS bearer.
  • the V2X message may be broadcast in an excessive area, resulting in a large waste of radio resources in the wireless air interface, and also causing many Vehicle UEs to be forced to receive V2X data irrelevant thereto.
  • the package increases the power consumption of the Vehicle UE.
  • the present invention provides a method and device for broadcasting a car network communication V2X message, and a method for establishing an MBMS bearer, so as to at least solve the problem that the V2X message broadcast area is too large in the related art.
  • a broadcast method of a car-network communication V2X message comprising: establishing a multimedia broadcast multicast service MBMS bearer for broadcasting a car-network communication V2X message; receiving a V2X message, and according to a terminal location and/or Or the cell location adjusts the broadcast area of the V2X message to obtain a designated broadcast area, where the terminal location is a location where the terminal that sends the V2X message is located, and the cell location is a location of a source cell that sends the V2X message; And transmitting, by the MBMS bearer, the V2X message in the specified broadcast area.
  • the method further comprises: receiving a session initiation request message from the broadcast/multicast service center BM-SC; for each of the broadcast areas
  • the first cell and/or the second cell are assigned an IP multicast address and a cell tunnel endpoint identifier C-TEID, wherein the IP multicast address and the C-TEID are used to identify the first cell and/or the An address of the second cell, where the second cell is directly opposite the first cell
  • the IP multicast address and the C-TEID are sent to the Mobility Management Entity (MME) by the Session Initiation Request message.
  • MME Mobility Management Entity
  • the method further includes: the first cell in the broadcast area to the second through the X2 interface Transmitting, by the cell, the IP multicast address and the C-TEID information that are allocated by the first cell, and the feedback, by the second cell, after receiving the IP multicast address and the C-TEID information, whether to join the broadcast Regional response message;
  • the method further includes: receiving an MBMS session initiation response message sent by the eNB, where the MBMS session initiation response message is carried in the MBMS session initiation response message Receiving the IP address and C-TEID of the MBMS session.
  • the MBMS session initiation response message carries the IP address corresponding to each cell.
  • the V2X message carries source cell information for sending the V2X message, where the source cell information includes an ID identifier of the source cell, and the MBMS bearer broadcasts in the designated broadcast area.
  • the V2X message includes: transmitting, by using the MBMS bearer, the V2X message to a source cell corresponding to the source cell information and/or a cell adjacent to the source cell in a multicast manner.
  • the transmitting, by the MBMS bearer, the sending, by using the MBMS bearer, the V2X message in the specified broadcast area including: receiving the V2X message, and receiving target cell list information of the V2X message, where the target cell list information The ID identifier of the target cell is included; the V2X message is sent to the cell and/or the base station corresponding to the target cell information by using the MBMS bearer in a unicast manner.
  • a method for establishing an MBMS bearer including: establishing one or more MBMS bearers in units of cells/cell groups; assigning a temporary mobile group identifier TMGI to each of the MBMS bearer sessions And a broadcast area; the activated MBMS bearer request or the session establishment request is sent to the network side network element; wherein the MBMS bearer is used by the network side network element to broadcast and send a V2X message.
  • the establishing one or more MBMS bearers in units of a cell/cell group includes: establishing one or more types of services with the V2X in units of cells/cell groups according to a V2X service type of the V2X message. Corresponding MBMS bearer.
  • the broadcast area includes: the source cell and a cell adjacent to the source cell.
  • the broadcast area includes a coverage area of a base station or a cell.
  • the same TMGI is allocated to the two MBMS bearers.
  • the establishing, by the cell/cell group, one or more MBMS bearers includes: determining whether a target broadcast area of the received V2X message is in a broadcast area set of an existing MBMS bearer; Transmitting an active MBMS bearer request or a session establishment request to the network side network element, where the activating the MBMS bearer request may be
  • the voice establishment request information carries an MBMS broadcast area.
  • the method further includes: receiving the V2X message, and determining an MBMS corresponding to the target broadcast cell of the V2X message. Carrying; delivering the V2X message to the specified MBMS bearer for broadcast transmission.
  • the broadcast area for performing broadcast transmission is determined according to at least one of the following: a predefined area, a V2X service type, a risk level of a traffic accident corresponding to the V2X message, a reach of a traffic accident corresponding to the V2X message, and a cell.
  • the authorized range of the terminal and the geographical location of the cell terminal is determined according to at least one of the following: a predefined area, a V2X service type, a risk level of a traffic accident corresponding to the V2X message, a reach of a traffic accident corresponding to the V2X message, and a cell.
  • a method for establishing another MBMS bearer including: establishing one or more MBMS bearers in units of terminals; assigning a temporary mobile group identifier TMGI and one for each of the MBMS bearer sessions
  • the MBMS bearer activation request or the session establishment request is sent to the network side network element; wherein the MBMS bearer is used by the network side network element to broadcast and send a V2X message.
  • establishing the MBMS bearer in the unit of the terminal includes: establishing one or more MBMS bearers according to the V2X service type of the V2X message in units of terminals.
  • establishing one or more MBMS bearers in the unit of the terminal includes: determining whether the terminal is in a terminal set that has established an MBMS bearer; and if the determination result is no, and according to the geographical location information in the V2X message Determining a broadcast area information list; sending the broadcast area information list to the network side network element by activating an MBMS bearer request or session establishment request information.
  • the method further includes: detecting whether a geographical location area where the terminal is located changes; When it is detected that the geographical location area where the terminal is located changes, a session update process for updating the broadcast area is sent to the network side network element.
  • the detecting whether the geographical location area of the terminal is changed includes: determining, according to geographical location information in the V2X message sent by the terminal, whether the broadcast area list changes; when the broadcast area list is changed. And determining that the geographical location area where the terminal is located changes.
  • determining, according to at least one of the following, a broadcast area for performing broadcast transmission: a predefined area, a V2X service type, a risk level of a traffic accident corresponding to the V2X message, a reach of a traffic accident corresponding to the V2X message, and a location The authorization scope of the terminal and the geographical location information of the terminal.
  • a broadcast method of another car network communication V2X message is provided, which is applied to a base station side and/or a roadside unit device, comprising: receiving a V2X message; parsing the V2X message to obtain the V2X message a target broadcast cell; broadcasting the V2X message in the target broadcast cell.
  • receiving the V2X message includes: receiving the V2X message sent by the MBMS bearer.
  • parsing the V2X message to obtain the target broadcast cell of the V2X message includes: performing, by using an application layer that parses the V2X message, location information and/or service type information of the V2X message, and according to Said The geographic location information and/or the service type information obtains the target broadcast cell information; or, the IP header information of the V2X message is parsed, and the target broadcast cell information is obtained according to the IP header information.
  • the method before receiving the V2X message sent by the MBMS bearer, the method further includes: determining, by the MBMS bearer identifier, whether the bearer carries a V2X message, or determining, by using a TMGI corresponding to the MBMS bearer session, Whether the bearer carries a V2X message.
  • the target broadcast cell of the V2X message is obtained according to at least one of the following: a predefined area, a V2X service type, a risk level of a traffic accident corresponding to the V2X message, and a reach of a traffic accident corresponding to the V2X message. , the authorization scope of the terminal, and the geographical location information of the terminal.
  • a broadcast method of another car network communication V2X message is provided, which is applied to a terminal side, including: determining a target broadcast area according to geographical location information of a location of the terminal; and transmitting information of the target broadcast area To the network side device, wherein the target broadcast area is an area that broadcasts a V2X message.
  • a broadcast apparatus for a car-network communication V2X message comprising: a processing module configured to establish a multimedia broadcast multicast service MBMS bearer for broadcasting a car-networking communication V2X message, and to receive the a V2X message; an adjustment module, configured to adjust a broadcast area of the V2X message according to a location where the terminal that sends the V2X message is located and/or a location of a source cell that sends the V2X message to obtain a designated broadcast area; and send a module, set to And transmitting, by the MBMS bearer, the V2X message in the specified broadcast area.
  • another broadcast apparatus for a vehicle networking communication V2X message which is applied to a base station side and/or a roadside unit device, comprising: a receiving module configured to receive a V2X message; and a parsing module for Parsing the V2X message to obtain a target broadcast cell of the V2X message; and sending, configured to broadcast and transmit the V2X message in the target broadcast cell.
  • a broadcast apparatus for providing another vehicle networking communication V2X message is provided on the terminal side, including: a determining module, configured to determine a target broadcast area according to geographical location information of a location where the terminal is located; and a sending module, It is arranged to transmit information of the target broadcast area to the network side device, wherein the target broadcast area is an area for broadcasting a V2X message.
  • Another embodiment of the present invention provides a computer storage medium, where the computer storage medium stores execution instructions for performing one or a combination of the steps in the foregoing method embodiments.
  • an MBMS bearer for establishing a car-network communication V2X message is first established, a V2X message is received, and a broadcast area of the V2X message is adjusted according to a terminal location and/or a cell location to obtain a designated broadcast area, wherein the terminal The location is the location of the terminal that sends the V2X message, where the cell location is the location of the source cell that sends the V2X message, and finally the V2X message is broadcasted and sent in the specified broadcast area by using the MBMS bearer.
  • the location of the terminal of the V2X message and/or the location of the source cell that sends the V2X message adjusts the broadcast area of the V2X message to reduce the broadcast area of the V2X message, and solves the problem that the V2X message broadcast area is too large in the related art.
  • the utility model reduces the waste of wireless resources in the wireless air interface during broadcasting in the related art, and also saves the power consumption of the V2X message broadcast message receiving terminal.
  • FIG. 1 is a schematic diagram of a scenario of a V2V service according to the related art of the present invention
  • FIG. 2 is a flowchart of a method of broadcasting a car network communication V2X message according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method for establishing an MBMS bearer according to an embodiment of the present invention
  • FIG. 4 is a flowchart of another method for establishing an MBMS bearer according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of another method for broadcasting a car network communication V2X message according to an embodiment of the present invention.
  • Figure 6 is a flow chart of an alternative embodiment 1 of the present invention.
  • FIG 8 is a flow chart of an alternative embodiment 2 in accordance with the present invention.
  • FIG. 2 is a broadcast of a car network communication V2X message according to an embodiment of the present invention.
  • a flow chart of the method, as shown in FIG. 2, the process includes the following steps:
  • Step S202 establishing an MBMS bearer for broadcasting a car network communication V2X message
  • Step S204 Receive a V2X message, and adjust a broadcast area of the V2X message according to the terminal location and/or the cell location to obtain a designated broadcast area, where the terminal location is a location where the terminal transmitting the V2X message is located, and the cell location is a source cell that sends the V2X message. s position;
  • Step S206 broadcasting and transmitting a V2X message in the designated broadcast area by using the MBMS bearer.
  • the MBMS bearer for establishing the car networking communication V2X message is first established, the V2X message is received, and the broadcast area of the V2X message is adjusted according to the terminal location and/or the cell location to obtain the designated broadcast area, wherein the terminal The location is the location of the terminal that sends the V2X message, where the cell location is the location of the source cell that sends the V2X message, and finally the V2X message is broadcasted and sent in the specified broadcast area by using the MBMS bearer.
  • the location of the terminal of the V2X message and/or the location of the source cell that sent the V2X message adjusts the broadcast of the V2X message
  • the area is used to reduce the broadcast area of the V2X message, which solves the problem that the V2X message broadcast area is too large in the related art, reduces the waste of the wireless resources in the wireless air interface during the broadcast in the related art, and saves the V2X message broadcast message reception.
  • the power consumption of the terminal is used to reduce the broadcast area of the V2X message, which solves the problem that the V2X message broadcast area is too large in the related art, reduces the waste of the wireless resources in the wireless air interface during the broadcast in the related art, and saves the V2X message broadcast message reception.
  • an MBMS bearer for broadcasting a V2X message is established, and the MBMS bearer corresponds to a broadcast area and a TMGI.
  • the V2X message is sent through the MBMS bearer broadcast.
  • the broadcast area of the V2X information transmitted through the MBMS bearer is included in the broadcast area corresponding to the MBMS bearer.
  • the network side dynamically adjusts the broadcast area according to the location of the UE that sends the V2X message and/or the source cell that sends the V2X message.
  • the source cell is a cell to which the terminal that sends the V2X message is currently connected.
  • establishing an MBMS bearer for broadcasting the V2X message includes:
  • the MBMS GW After receiving the session initiation request message from the BM-SC, the MBMS GW sends a session initiation response message to the BM-SC, assigns an IP multicast address and a C-TEID to each cell, and multicasts the IP through the session initiation request message.
  • the address and C-TEID are sent to the Mobile Management Entity (MME).
  • MME Mobile Management Entity
  • the cell may send the allocated IP multicast address and C-TEID information to the neighboring cell through the X2 interface.
  • the cell determines whether it needs to join the IP multicast group, or the MBMS GW receives the session start request message from the BM-SC. Afterwards, the session initiation response message is sent to the BM-SC, and an IP multicast address and a C-TEID are allocated to each cell and the neighboring cell of the cell, and the IP multicast address and the C-TEID are sent through the session initiation request message.
  • the neighboring cells may include both directly adjacent and indirectly adjacent cells, and the indirect neighbors are adjacent to the cell through the intermediate zone, and the intermediate zone is directly adjacent to the cell.
  • the establishing the MBMS bearer includes: when the MBMS GW creates the MBMS bearer context, the IP multicast address is no longer allocated, and the eNB sends the IP address and the C-TEID for receiving the MBMS session in the MBMS session start response message, optionally. Different C-TEIDs can be assigned in different cells.
  • the MBMS GW obtains the IP address and TEID of each eNB or each cell for each TMGI.
  • sending the V2X message by using the established MBMS bearer broadcast includes: when the BM-SC sends the V2X data packet to the MBMS-GW, carrying the source cell information, and after receiving the V2X message, the MBMS GW passes the message corresponding to the source.
  • the IP multicast address of the cell and the C-TEID are multicast, and the source cell and the neighboring cell joining the multicast group can receive the MBMS data from the source cell.
  • the source cell is a cell to which the terminal that sends the V2X message is currently connected.
  • the target cell list information is carried, and the MBMS GW sends the MBMS data to the corresponding base station/cell in a unicast manner.
  • a broadcast device for a car-network communication V2X message is provided.
  • the device can be used independently or on other devices, such as an MBMS GW.
  • the device includes:
  • a processing module configured to establish a MBMS bearer for a multimedia broadcast multicast service for broadcasting a car networking communication V2X message, And receiving the V2X message;
  • the adjusting module is configured to adjust a broadcast area of the V2X message according to a location where the terminal that sends the V2X message is located and/or a location of a source cell that sends the V2X message to obtain a designated broadcast area;
  • a sending module configured to broadcast and send the V2X message in the designated broadcast area by using the MBMS bearer.
  • the method in the foregoing method embodiment may also be disposed in a broadcast device of the car network communication V2X message of the present application in a unit or a sub-module, and implement the same function.
  • FIG. 3 is a flowchart of a method for establishing an MBMS bearer according to an embodiment of the present invention, such as As shown in Figure 3, the process includes the following steps:
  • Step S302 establishing one or more MBMS bearers in units of cells/cell groups
  • Step S304 assigning a temporary mobile group identifier TMGI and a broadcast area to each MBMS bearer session;
  • Step S306 sending an activated MBMS bearer request or a session establishment request to the network side network element;
  • the MBMS bearer is used for the network side network element to broadcast and send the V2X message.
  • the V2X server and/or the BM-SC establishes an MBMS bearer session in units of cells or cell groups, and allocates one TMGI and one broadcast area for each MBMS session.
  • the network side sends a V2X message through the MBMS bearer broadcast.
  • the V2X server and/or the BM-SC may establish one or more MBMS bearer sessions in units of cells or cell groups according to different V2X service types.
  • the V2X server and/or the BM-SC establishes an MBMS bearer session in units of cells or cell groups, and allocating one broadcast area for each MBMS session further includes: the broadcast area of the MBMS session is the source cell and all phases of the cell Neighboring cell.
  • the source cell is a cell to which the terminal that sends the V2X message is currently connected; or the broadcast area of the MBMS session is a base station or a cell.
  • the two sessions may be assigned the same TMGI.
  • the V2X server when the V2X receives the V2X data of the UE from the cell for the first time, the V2X server sends an activated MBMS bearer request message to the BM-SC, where the bearer request information includes the MBMS broadcast area.
  • the network side sends the V2X message by using the MBMS bearer broadcast, including:
  • the V2X server may also receive the session establishment response information to confirm that the peer network element completes the bearer establishment, and then performs the process of transmitting the V2X message, and then sends the V2X message to the BM-SC, the V2X server or
  • the BM-SC identifies which MBMS bearer the data packet corresponds to, and delivers the corresponding bearer to the IP broadcast transmission; or, after receiving the V2X message, the V2X server determines that the target broadcast cell is one or more cells, and thereafter, V2X service
  • the BM-SC identifies the MBMS bearer corresponding to one or more cells, and delivers the V2X message data packet to the corresponding one or more bearers for broadcast transmission.
  • the basis includes: an area specified by the national policy; a V2X service type; a severity of the traffic accident corresponding to the V2X information; and an authorized range/location of the UE.
  • This embodiment provides an apparatus for establishing an MBMS bearer, which is used to implement a corresponding function of the foregoing MBMS bearer establishment method.
  • FIG. 4 is a method for establishing another MBMS bearer according to an embodiment of the present invention.
  • the flow chart, as shown in FIG. 4, includes the following steps:
  • Step S402 establishing one or more MBMS bearers in units of terminals
  • Step S404 assigning a temporary mobile group identifier TMGI and a broadcast area to each MBMS bearer session;
  • Step S406 the MBMS bearer activation request or the session establishment request is sent to the network side network element.
  • the MBMS bearer is used for the network side network element to broadcast and send the V2X message.
  • the V2X server and/or the BM-SC establishes an MBMS bearer in units of UEs, and allocates one TMGI and one broadcast area for each MBMS session.
  • the network side sends a V2X message through the MBMS bearer broadcast.
  • the V2X server when the V2X server receives the V2X data from a certain UE for the first time, the V2X server sends an activated MBMS bearer request message to the BM-SC, and the V2X server or the BM-SC determines the broadcast according to the geographical location information in the V2X message.
  • the area information list is sent to the MBMS GW through the session establishment request information.
  • the V2X server or the BM-SC determines that the broadcast message list changes according to the geographical location information in the V2X message, and the BM-SC may initiate a session update process to update the broadcast area.
  • the V2X server or the BM-SC determines, according to the geographical location information in the V2X message, the basis of the broadcast message list, including: a broadcast area specified by a national or regional policy; a V2X service type; a severity of a traffic accident corresponding to the V2X information; The scope of the attack; the authorized scope/location of the UE.
  • This embodiment provides an apparatus for establishing an MBMS bearer, which is used to implement a corresponding function of the foregoing MBMS bearer establishment method.
  • FIG. 5 is a flowchart of another method for broadcasting a car network communication V2X message according to an embodiment of the present invention. As shown in FIG. 5, the process includes the following steps:
  • Step S502 receiving a V2X message
  • Step S504 parsing the V2X message to obtain a target broadcast cell of the V2X message
  • Step S506 broadcasting and transmitting a V2X message in the target broadcast cell.
  • the base station determines whether the message is a V2X message, if not a V2X message, broadcasts, and if it is a V2X message, further parses the application layer message according to the location included in the message. The information determines whether broadcasts are needed and in which cells need to be broadcast. If a cell needs to be broadcasted in the cell under the base station, the base station sends an MBMS message through the air interface.
  • the V2X message can be broadcasted through the air interface.
  • determining whether the message is a V2X message includes: determining whether the bearer carries the V2X message by using the MBMS bearer identifier; or determining whether the bearer carries the V2X message by using the TMGI corresponding to the MBMS bearer session;
  • determining, according to the location information included in the message, whether the broadcast is needed and the basis for broadcasting in the cell include: the area specified by the national policy, the V2X service type, the severity of the traffic accident corresponding to the V2X information, and the scope of the traffic accident, The authorized scope/location of the UE.
  • another broadcast device for the vehicle networking communication V2X message is provided, and the device can be used independently or on other devices, such as an application on a cell base station, or a roadside unit device, optionally, a road.
  • the edge unit device also includes a bypass base station and a bypass terminal, the device comprising:
  • a receiving module configured to receive a V2X message
  • a parsing module configured to parse the V2X message to obtain a target broadcast cell of the V2X message
  • the sending module is configured to broadcast and send a V2X message in the target broadcast cell.
  • the method in the foregoing method embodiment may also be disposed in a broadcast device of the car network communication V2X message of the present application in a unit or a sub-module, and implement the same function.
  • Another method for broadcasting a car network communication V2X message is provided in the embodiment, which is applied to the terminal side, and includes the following steps:
  • Step S602 determining a target broadcast area according to geographical location information of a location where the terminal is located;
  • Step S604 the information of the target broadcast area is sent to the network side device, where the target broadcast area is an area for broadcasting a V2X message.
  • the embodiment also provides a broadcast device for the vehicle networking communication V2X message, which is applied to the terminal side, and includes:
  • Determining a module configured to determine a target broadcast area according to geographical location information of the location of the terminal
  • a sending module configured to send information of the target broadcast area to the network side device, where the target broadcast area is an area for broadcasting a V2X message.
  • the broadcast mechanism can be flexibly and dynamically configured as compared with the related art, thereby avoiding the possibility of messages. Broadcasting in an excessive area results in a large waste of radio resources in the wireless air interface and a problem that a large number of UEs are forced to receive data packets unrelated thereto, thereby saving power consumption of the receiving UE.
  • the terminal A can send the V2X message to the serving base station through the uplink cellular network, and then send the message to the V2X server, and the V2X server passes the MBMS mechanism.
  • the V2X message broadcast is sent down.
  • the network side needs to establish an MBMS bearer first, and then send a V2X message through the established MBMS bearer broadcast.
  • the UE is a terminal, and the E-UTRAN and the UTRAN are respectively a Global Mobile Telecommunication System Radio Access Network (UTRAN), an evolved UTRAN (Evolved UTRAN, E-UTRAN for short), and an MME.
  • /SGSN is a mobility management entity, Serving GPRS Supporting Node (SGSN).
  • Figure 6 is a flow chart of an alternative embodiment 1 of the present invention, as shown in Figure 6, comprising:
  • Step S60 (not shown in FIG. 6):
  • the V2X server wants to activate an MBMS bearer
  • the V2X server sends an activated MBMS bearer request message to the BM-SC, and activates the MBMS bearer request information, including but not limited to TMGI, service. Quality of Service (QoS), MBMS broadcast area and start time.
  • TMGI is optional.
  • the MBMS broadcast area parameter includes an MBMS service area id list and/or a cell id list.
  • the V2X server may activate an MBMS bearer before, or may activate the V2X message that needs to be transmitted through the MBMS bearer for the first time.
  • Step S61 The BM-SC sends a session start request message to the MBMS GW, and the BM-SC carries the broadcast area information in the MBMS session start request message.
  • Step S62 The MBMS GW sends a session initiation response message to the BM-SC, a Session Start Response;
  • Step S63 The MBMS GW creates an MBMS bearer context, assigns an IP multicast address and a C-TEID to each cell or cell group in the broadcast area, and then includes a session start request information Session including the IP multicast address and the C-TEID information.
  • the Start Request is sent to the MME.
  • FIG. 7 is a signaling flowchart of information exchange between base stations according to an optional embodiment of the present invention. As shown in FIG. 7, a cell may send an assigned IP address and C-TEID information to an adjacent cell through an X2 interface.
  • the cell After receiving the allocated IP address and C-TEID information sent by the neighboring cell, the cell determines whether it needs to join the IP multicast group; or the MBMS GW creates an MBMS bearer context, and divides the cell in the broadcast area into multiple cells. Groups, cells of different cell groups may overlap. Then, each cell group is assigned an IP multicast address and a C-TEID, and the session initiation request information including the IP multicast address and the C-TEID information is sent to the MME.
  • Step S64 After receiving the information, the MME creates an MBMS bearer context, and sends a session start to the MCE/eNB. Ask for the information Session Start Request. And including the IP multicast address and the C-TEID of the cell in the session initiation request information. If the cell is in multiple cell groups, multiple IP multicast addresses and C-TEIDs may be assigned.
  • Step S65 The base station/MCE sends a session initiation response message Session Start Response to the MME.
  • Step S66 The MME sends a session initiation response message Session Start Response to the MBMS GW.
  • Step S67 The base station sends a session initiation information RAN Resource Setup to the terminal;
  • Step S68 The base station joins the IP multicast group IP Multicast Join to receive the MBMS user plane data.
  • the V2X server or the BM-SC After the network side establishes the MBMS bearer, when the V2X server or the BM-SC receives the V2X message data packet, and then sends the data packet to the MBMS-GW, it also carries the source cell information, and after receiving the V2X message, the MBMS GW will The message is corresponding to the IP multicast address of the source cell and the C-TEID for multicast transmission. Then, the source cell and the neighboring cell that joins the multicast group can receive the MBMS data of the local area.
  • FIG. 8 is a flowchart of an alternative embodiment 2 of the present invention. As shown in FIG. 8, this embodiment is similar to the alternative embodiment 1, and the differences are as follows:
  • the differences in the bearer establishment process include:
  • step S73 the MBMS GW no longer allocates an IP multicast address when creating an MBMS bearer context.
  • the base station transmits an IP address for a certain MBMS session reception and a C-TEID in the MBMS Session Initiation Response message (a different C-TEID may be considered for different cell allocations).
  • the MBMS GW obtains the IP address and TEID of each eNB or each cell for each TMGI.
  • the V2X server or the BM-SC After the bearer is established, when the V2X server or the BM-SC receives the V2X message data packet, and then sends the data packet to the MBMS-GW, it also carries the target cell information, and after the MBMS GW receives the V2X message, the obtained MB2 GW obtains the V2X message.
  • the IP address and the C-TEID information are sent to the corresponding target base station/cell in a unicast manner.
  • the V2X server and/or the BM-SC establishes an MBMS bearer session in units of cells, and allocates one TMGI and one broadcast area for each MBMS session. After that, the network side sends a V2X message through the MBMS bearer broadcast.
  • the V2X server and/or the BM-SC establishes an MBMS bearer session in units of cells, including the following steps:
  • Step S81 When the V2X server wants to activate an MBMS bearer, the V2X server sends an activated MBMS bearer request message to the BM-SC.
  • Step S82 The BM-SC sends a session initiation request message to the MBMS GW, and the BM-SC carries the broadcast area in the MBMS session initiation request message.
  • the V2X server and/or the BM-SC may establish one or more MBMS bearer sessions in units of cells or cell sets according to different V2X service types.
  • the broadcast area of the MBMS session is the source cell and all neighboring cells of the cell.
  • the two sessions may be assigned the same TMGI.
  • Step S83 After the MBMS GW sends a session initiation response message to the BM-SC, the MBMS bearer context is created, and the IP multicast address and the C-TEID are allocated, and then (TMGI, Flow Identifier, QoS, MBMS service Area, list of cell IDs if The information of the available, Session identifier, estimated session duration, transport network IP Multicast Address (es), IP address (es) of the multicast source, C-TEID, ...) is sent to the MME.
  • TMGI Flow Identifier
  • QoS Quality of Service
  • MBMS service Area list of cell IDs if The information of the available, Session identifier, estimated session duration, transport network IP Multicast Address (es), IP address (es) of the multicast source, C-TEID, .
  • Step S84 After receiving the information, the MME creates an MBMS bearer context, and sends session initiation request information to the MCE/eNB.
  • Step S85 The base station sends a session initiation response message to the MCE/MME.
  • Step S86 The base station sends session initiation information to the terminal.
  • Step S87 The base station joins the IP multicast group to receive the MBMS user plane data.
  • Step S88 The base station sends the MBMS data through the air interface.
  • the network side sends the V2X message through the MBMS bearer broadcast, including:
  • the V2X server After receiving the V2X message data packet, the V2X server sends the V2X message data packet to the BM-SC, and the V2X server or the BM-SC identifies which source cell the data packet comes from, thereby determining which MBMS bearer corresponds to and delivering the corresponding bearer to the IP broadcast transmission. Or, after receiving the V2X message data packet, the V2X server sends the V2X message data packet to the BM-SC, and the V2X server or the BM-SC determines the broadcast range according to the geographical location information in the V2X data packet, and further determines which MBMS bearer corresponds to And delivered to the corresponding bearer for IP broadcast transmission.
  • the basis includes: a national policy; a V2X service type; a severity of the traffic accident corresponding to the V2X information; and an authorized range/location of the UE.
  • the differences in the bearer establishment process include:
  • the V2X server and/or the BM-SC may establish one or more MBMS bearer sessions in units of cells according to different V2X service types.
  • the broadcast area of the MBMS session is a base station or a cell.
  • MBMS session V2X servers and/or BM-SCs with different broadcast areas can be for them Assign the same TMGI.
  • the network side sends the V2X message through the MBMS bearer broadcast, including:
  • the V2X server After receiving the V2X message, the V2X server determines that the target target broadcast cell is one or more cells, and then the V2X server or the BM-SC identifies the MBMS bearer corresponding to one or more cells, and delivers the V2X message data packet to the corresponding One or more bearers are broadcasted.
  • the basis includes: a national policy; a V2X service type; a severity of the traffic accident corresponding to the V2X information; and an authorized range/location of the UE.
  • the V2X server and/or the BM-SC establishes an MBMS bearer in units of UEs, and allocates one TMGI and one broadcast area for each MBMS session.
  • One or more MBMS sessions may be established in units of UEs according to different types of V2X services.
  • the V2X message is sent for the first time and transmitted to the V2X server through the cellular network.
  • Step S101 When the V2X server receives the V2X data from the vehicle B for the first time, the V2X server sends an activated MBMS bearer request information to the BM-SC;
  • Step S102 The V2X server or the BM-SC determines the broadcast area information list according to the geographical location information in the V2X message, and sends the broadcast area information list to the MBMS GW through the session establishment request information.
  • the basis for judging which areas to broadcast includes: national policy; V2X service type; the severity and scope of traffic accidents corresponding to V2X information; the authorized scope/geographical location of the UE.
  • Step S103 After the MBMS GW sends the session initiation response message to the BM-SC, the MBMS bearer context is created, the IP multicast address and the C-TEID are allocated, and the session initiation request information is sent to the MME.
  • Step S104 After receiving the information, the MME creates an MBMS bearer context, and sends session initiation request information to the MCE/eNB.
  • Step S105 The base station sends a session initiation response message to the MCE/MME.
  • Step S106 The base station sends session initiation information to the terminal.
  • Step S107 The base station joins the IP multicast group to receive the MBMS user plane data.
  • Step S108 The base station sends the MBMS data through the air interface.
  • the V2X server or the BM-SC determines that the broadcast message list has changed according to the geographical location information in the V2X message, and the BM-SC may initiate a session update process to update the broadcast area.
  • the network side sends a V2X message through the MBMS bearer broadcast.
  • the V2X server receives the V2X data from the vehicle B, it determines the MBMS bearer corresponding to the vehicle B, and sets the V2X message packet. Delivered to the corresponding bearer for broadcast transmission.
  • the process of bearer establishment in this embodiment is similar to the prior art or the above embodiment, and the difference lies in the transmission of user plane data.
  • the base station determines whether the message is a V2X message, and if it is a V2X message, further parses the application layer message, determines whether the broadcast needs to be performed according to the location information included in the message, and needs In which cells are broadcast. If a cell needs to be broadcasted in the cell under the base station, the base station sends an MBMS message through the air interface.
  • determining whether the message is a V2X message includes: determining whether the bearer carries the V2X message by using the MBMS bearer identifier; or determining whether the bearer carries the V2X message by using the TMGI corresponding to the MBMS bearer session.
  • determining, according to the location information included in the message, whether the broadcast is required and the basis for broadcasting in the cell include: a national policy; a V2X service type; a severity of the traffic accident corresponding to the V2X information; and a range of the UE; Authorized scope / geographic location.
  • the process of bearer establishment in this embodiment is similar to the prior art or the above embodiment, and the difference lies in the transmission of user plane data.
  • the base station determines whether the message is a V2X message, and if it is a V2X message, further parses the application layer message, determines whether the broadcast needs to be performed according to the location information included in the message, and needs In which cells are broadcast. If a cell needs to be broadcasted in the cell under the base station, the base station sends an MBMS message through the air interface.
  • the base station After receiving the data message sent by the terminal, the base station determines whether the message is a V2X message. If it is not a V2X message, it sends the message to the upper layer network element. If it is a V2X message, the V2X message is parsed to obtain the target broadcast cell of the V2X message, including the following. Two ways:
  • the IP header information of the V2X message is parsed, and the target broadcast cell information is obtained according to the IP header information.
  • determining, according to the location information included in the message, whether the broadcast is required and the basis for broadcasting in the cell include: a national policy; a V2X service type; a severity of the traffic accident corresponding to the V2X information; and a range of the UE; Authorized scope / geographic location.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods of various embodiments of the present invention.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • the broadcast area of the V2X message is adjusted according to the location of the terminal that sends the V2X message and/or the location of the source cell that sends the V2X message to obtain the designated broadcast area.
  • the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (RAM).
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • the processor performs an MBMS bearer for establishing a car networking communication V2X message according to the stored program code in the storage medium, and receives the V2X message;
  • the processor performs, according to the stored program code in the storage medium, the broadcast area of the V2X message according to the location of the terminal that sends the V2X message and/or the location of the source cell that sends the V2X message. Broadcast area
  • the processor performs broadcast transmission of the V2X message in the designated broadcast area by using the MBMS bearer according to the stored program code in the storage medium.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the method and device for broadcasting a car network communication V2X message and the method for establishing an MBMS bearer have the following beneficial effects: solving the problem of solving the problem that the V2X message broadcast area is too large in the related art, and reducing the problem.
  • the waste of radio resources in the wireless air interface during broadcasting also saves the power consumption of the V2X message broadcast message receiving terminal.

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Abstract

本发明提供了一种车联网通信V2X消息的广播方法及装置、MBMS承载的建立方法，其中，包括：建立用于广播车联网通信V2X消息的多媒体广播多播业务MBMS承载；接收V2X消息，并根据终端位置和/或小区位置调整所述V2X消息的广播区域得到指定广播区域，其中，所述终端位置为发送所述V2X消息的终端所在的位置，所述小区位置为发送所述V2X消息的源小区的位置；通过所述MBMS承载在所述指定广播区域内广播发送所述V2X消息。通过本发明，解决了解决相关技术中V2X消息广播区域过大的问题，减少了相关技术中在广播时无线空口中无线资源的浪费，也节省了V2X消息广播消息接收终端的耗电量。

Description

车联网通信V2X消息的广播方法及装置、MBMS承载的建立方法 技术领域
本发明涉及通信领域，具体而言，涉及一种车联网通信V2X消息的广播方法及装置、MBMS承载的建立方法。
背景技术
车联网通信V2X(Vehicle-to-Everything Communications，简称为V2X)是指通过装载在车辆上的传感器、车载终端及电子标签提供车辆信息，采用各种通信技术实现车与车通信(Vehicle-to-Vehicle Communication，简称V2V)、车与人通信(Vehicle-to-Pedestrian Communications，简称为V2P)、车与网络基础设施通信(Vehicle-to-Infrastructure Communications，简称为V2I)，车与网络(Vehicle-to-Network Communications，简称为V2I)通信，并在信息网络平台上对信息进行提取、共享等有效利用，对车辆进行有效的管控和提供综合服务。
相关技术中，3GPP有基于LTE的V2X。根据当前3GPP的定义，V2X业务是一种有使用V2V应用的发送或接收UE参与的通过3GPP传输的通信业务。基于参与到通信的另一方，V2X业务可以进一步分为V2V业务、V2I业务、V2P业务和V2N业务。V2P业务是指UE之间使用V2P应用通信的业务。V2I业务是指UE和路边单元(Road Side Unit，简称RSU)使用V2I应用进行交互的业务。RSU是支持V2I业务的实体，可以发送V2I业务到使用V2I应用的UE，也可以从使用V2I业务的UE接收V2I业务。RSU可以通过基站(eNB)或者静止的UE实现。如果RSU是通过基站实现的，即称为eNB type RSU。如果RSU是通过UE实现的，即称为UE type RSU。
相关技术中的3GPP讨论了V2V的三种场景，其中，E-UTRAN为LTE接入网，即演进的全球移动通信***无线接入网(Evolved Universal Mobile Telecommunication System Radio Access Network，简称为E-UTRAN)，旁路连接SL(side link)，下行连接DL(down link)，上行连接UL(up link)，图1是根据本发明相关技术中V2V业务的场景示意图，如图1所示：场景1，该场景支持仅仅基于PC5接口的V2V通信。UE通过PC5接口发送V2X消息给局部区域的多个UE；场景2，该场景支持仅仅基于Uu口的V2V通信。UE上行传输V2X消息到E-UTRAN，E-UTRAN再将该V2X消息下行广播给局部区域的多个UE；场景3，该场景支持使用Uu和PC5接口的V2V通信。UE通过PC5接口发送V2X消息给其他UE，其中，3a：UE type RSU从PC5接口接收到V2X消息后将该V2X消息上行传输给E-UTRAN,E-UTRAN将从UE type RSU处接收到的V2X消息下行广播给局部区域的多个UE。3b：UE上行传输V2X消息到E-UTRAN，E-UTRAN从Uu口接收到V2X消息后将该V2X消息传输到一个或者多个UE type RSU，UE type RSU将从E-UTRAN处接收到的V2X消息通过PC5接口发送给局部区域的多个UE。
为了有效地利用移动网络资源，第三代合作伙伴计划(3GPP，3rd Generation Partnership Project)提出了多媒体广播多播业务(Multimedia Broadcast Multicast Service简称为MBMS)，该业务是一种从一个数据源向多个目标移动终端传送数据的技术，实现了网络(包括核心网和接入网)资源的共享，提高了网络资源(尤其是空中接口资源)的利用率。在3GPP R13之前的MBMS传输模式是指采用MBSFN模式传输(MBMS单频网，MBMS single frame network)，即：多个小区在相同的时刻发送相同的内容。
基于前文所述的V2V的三种场景中，场景2和场景3中都需要E-UTRAN将V2X消息下行广播给局部区域的多个UE，因此，现有讨论认为MBMS是一种最好的用于广播V2X消息的机制。
根据相关技术，网络侧包括V2X AS(V2XApplication server，V2X应用服务器，也称为：AS(应用服务器)，V2X server(V2X服务器)，V2X Application layer(V2X应用层)，V2X AS为V2X业务的内容提供者)，BM-SC(Broadcast-Multicast-Service Centre，广播/组播业务中心)和/或3GPP核心网，及其RAN接入网元(如:eNB)。网络侧可以为每一种V2X业务类型都建立一个MBMS承载，对应一个MBMS RAB(MBMS radio access bearer，MBSM无线接入承载)并分配一个特定的TMGI(Temporary Mobile Group Identity，临时移动组标识)。V2X AS将V2X业务分成若干V2X业务类型，而且每个V2X业务类型都对应一个TMGI。BM-SC为每一个TMGI都需要建立单独的MBMS承载，也就是说，每个V2X业务类型都需要建立单独的MBMS承载，即：每个TMGI对应一个V2X业务类型对应一个MBMS承载。
如果采用现有的MBMS机制来进行广播，那么V2X消息可能在过大的区域内广播从而导致在无线空口中无线资源的大量浪费，也会导致许多Vehicle UE被迫地接收到了与其无关的V2X数据包，从而增加了Vehicle UE的耗电量。针对相关技术中的上述问题，目前尚未发现有效的解决方案。
发明内容
本发明提供了一种车联网通信V2X消息的广播方法及装置、MBMS承载的建立方法，以至少解决相关技术中V2X消息广播区域过大的问题。
根据本发明的一个方面，提供了一种车联网通信V2X消息的广播方法，包括：建立用于广播车联网通信V2X消息的多媒体广播多播业务MBMS承载；接收V2X消息，并根据终端位置和/或小区位置调整所述V2X消息的广播区域得到指定广播区域，其中，所述终端位置为发送所述V2X消息的终端所在的位置，所述小区位置为发送所述V2X消息的源小区的位置；通过所述MBMS承载在所述指定广播区域内广播发送所述V2X消息。
可选地，在所述建立用于传输车联网通信V2X的MBMS承载消息之后，所述方法还包括：接收来自广播/组播业务中心BM-SC的会话启动请求消息；为广播区域的每个第一小区和/或第二小区分配一个IP组播地址和小区隧道端点标识C-TEID，其中，所述IP组播地址和所述C-TEID用于标识所述第一小区和/或第二小区的地址，其中，所述第二小区与所述第一小区直 接或间接相邻；通过会话启动请求消息将所述IP组播地址和所述C-TEID发给移动性管理实体(Mobile Management Entity，简称MME)。
可选地，在为广播区域的每个第一小区分配一个IP组播地址和小区隧道端点标识C-TEID之后，还包括：所述广播区域内的第一小区通过X2接口向所述第二小区发送所述第一小区被分配的IP组播地址和C-TEID信息；所述第二小区在接收到所述IP组播地址和C-TEID信息后反馈的用于确认是否加入所述广播区域的响应消息；
可选地，在建立用于广播车联网通信V2X消息的MBMS承载之前，所述方法还包括：接收所述eNB发送的MBMS会话启动响应消息，其中，所述MBMS会话启动响应消息中携带用于接收所述MBMS会话的IP地址和C-TEID。
可选地，在所述eNB管辖有多个小区时，所述MBMS会话启动响应消息中携带与每个小区对应的所述IP地址。
可选地，所述V2X消息中携带有发送所述V2X消息的源小区信息，其中，所述源小区信息包括源小区的ID标识；通过所述MBMS承载在所述指定广播区域内广播发送所述V2X消息包括：通过所述MBMS承载以组播的方式将所述V2X消息发送给与所述源小区信息对应的源小区和/或与所述源小区相邻的小区。
可选地，通过所述MBMS承载在所述指定广播区域内广播发送所述V2X消息包括：接收所述V2X消息，以及接收所述V2X消息的目标小区列表信息，其中，所述目标小区列表信息包括目标小区的ID标识；通过所述MBMS承载以单播的方式将所述V2X消息发送给与所述目标小区信息对应的小区和/或基站。
根据本发明的另一方面，提供了一种MBMS承载的建立方法，包括：以小区/小区组为单位建立一个或多个MBMS承载；为每个所述MBMS承载会话分配一个临时移动组标识TMGI和一个广播区域；将激活MBMS承载请求或者会话建立请求发送给网络侧网元；其中，所述MBMS承载用于所述网络侧网元广播发送V2X消息。
可选地，所述以小区/小区组为单位建立一个或多个MBMS承载包括：根据所述V2X消息的V2X业务类型，以小区/小区组为单位建立一个或多个与所述V2X业务类型对应的MBMS承载。
可选地，所述广播区域包括：所述源小区和与所述源小区相邻的小区。
可选地，所述广播区域包括一个基站的覆盖区域或一个小区。
可选地，以小区/小区组为单位建立多个MBMS承载，且其中两个MBMS承载的广播区域之间不存在重叠区域的时，为所述两个MBMS承载分配相同的TMGI。
可选地，在所述以小区/小区组为单位建立一个或多个MBMS承载包括：判断接收到的V2X消息的目标广播区域是否在已有MBMS承载的广播区域集合内；若判断结果为否，向网络侧网元发送激活MBMS承载请求或会话建立请求，其中，所述激活MBMS承载请求或会 话建立请求信息携带有MBMS广播区域。
可选地，在将所述激活MBMS承载请求或会话建立请求发送给网络侧网元之后，所述方法还包括：接收所述V2X消息，并确定与所述V2X消息的目标广播小区对应的MBMS承载；将所述V2X消息投递到所述指定MBMS承载进行广播发送。
可选地，依据以下至少之一确定进行广播发送的广播区域：预定义区域、V2X业务类型、所述V2X消息对应的交通事故的危险等级、所述V2X消息对应的交通事故的波及范围、小区终端的授权范围、小区终端的地理位置。
根据本发明的另一方面，提供了另一种MBMS承载的建立方法，包括：以终端为单位建立一个或多个MBMS承载；为每个所述MBMS承载会话分配一个临时移动组标识TMGI和一个广播区域；将MBMS承载激活请求或会话建立请求发送给网络侧网元；其中，所述MBMS承载用于所述网络侧网元广播发送V2X消息。
可选地，以终端为单位建立MBMS承载包括：以终端为单位根据所述V2X消息的V2X业务类型建立一个或多个MBMS承载。
可选地，以终端为单位建立一个或多个MBMS承载包括：判断所述终端是否在已经建立MBMS承载的终端集合内；在判断结果为否时，并根据所述V2X消息中的地理位置信息判断出广播区域信息列表；将所述广播区域信息列表通过激活MBMS承载请求或会话建立请求信息发送给所述网络侧网元。
可选地，在将所述广播区域信息列表通过激活MBMS承载请求或会话建立请求发送给所述网络侧网元之后，所述方法还包括：检测所述终端所在的地理位置区域是否发生变化；在检测到所述终端所在的地理位置区域发生变化时，向所述网络侧网元发送用于更新所述广播区域的会话更新过程。
可选地，所述检测所述终端所在的地理位置区域是否发生变化包括：根据所述终端发送的V2X消息中的地理位置信息判断广播区域列表是否发生改变；在所述广播区域列表发生改变时，确定所述终端所在的地理位置区域发生变化。
可选地，依据以下至少之一确定进行广播发送的广播区域：预定义区域、V2X业务类型、所述V2X消息对应的交通事故的危险等级、所述V2X消息对应的交通事故的波及范围、所述终端的授权范围、所述终端的地理位置信息。
根据本发明的一个方面，提供了另一种车联网通信V2X消息的广播方法，应用在基站侧和/或路边单元设备，包括：接收V2X消息；解析所述V2X消息得到所述V2X消息的目标广播小区；在所述目标广播小区内广播发送所述V2X消息。
可选地，接收V2X消息包括：接收通过MBMS承载发送的所述V2X消息。
可选地，解析所述V2X消息得到所述V2X消息的目标广播小区包括以下方式之一：解析所述V2X消息的应用层得到所述V2X消息的地理位置信息和/或业务类型信息，并根据所述 地理位置信息和/或业务类型信息得到所述目标广播小区信息；或者，解析所述V2X消息的IP头信息，并根据所述IP头信息获得所述目标广播小区信息。
可选地，在接收通过MBMS承载发送的所述V2X消息之前，所述方法还包括：通过MBMS承载标识来判断所述承载是否携带V2X消息，或，通过MBMS承载会话对应的TMGI来判断所述承载是否携带V2X消息。
可选地，依据以下至少之一得到所述V2X消息的目标广播小区：预定义区域、V2X业务类型、所述V2X消息对应的交通事故的危险等级、所述V2X消息对应的交通事故的波及范围、终端的授权范围、终端的地理位置信息。
根据本发明的一个方面，提供了另一种车联网通信V2X消息的广播方法，应用在终端侧，包括：根据终端所在位置的地理位置信息确定目标广播区域；将所述目标广播区域的信息发送给网络侧设备，其中，所述目标广播区域为广播V2X消息的区域。
根据本发明的另一个方面，提供了一种车联网通信V2X消息的广播装置，包括：处理模块，设置为建立用于广播车联网通信V2X消息的多媒体广播多播业务MBMS承载，以及接收所述V2X消息；调整模块，设置为根据发送所述V2X消息的终端所在的位置和/或发送所述V2X消息的源小区的位置调整所述V2X消息的广播区域得到指定广播区域；发送模块，设置为通过所述MBMS承载在所述指定广播区域内广播发送所述V2X消息。
根据本发明的另一个方面，提供了另一种车联网通信V2X消息的广播装置，应用在基站侧和/或路边单元设备，包括：接收模块，设置为接收V2X消息；解析模块，用于解析所述V2X消息得到所述V2X消息的目标广播小区；发送模块，设置为在所述目标广播小区内广播发送所述V2X消息。
根据本发明的另一个方面，提供了另一种车联网通信V2X消息的广播装置，应用在终端侧，包括：确定模块，设置为根据终端所在位置的地理位置信息确定目标广播区域；发送模块，设置为将所述目标广播区域的信息发送给网络侧设备，其中，所述目标广播区域为广播V2X消息的区域。
本发明另一实施例提供了一种计算机存储介质，所述计算机存储介质存储有执行指令，所述执行指令用于执行上述方法实施例中的步骤之一或其组合。
通过本发明，采用首先建立用于广播车联网通信V2X消息的MBMS承载，接收V2X消息，并根据终端位置和/或小区位置调整所述V2X消息的广播区域得到指定广播区域，其中，所述终端位置为发送所述V2X消息的终端所在的位置，所述小区位置为发送所述V2X消息的源小区的位置，最后通过所述MBMS承载在所述指定广播区域内广播发送所述V2X消息，通过V2X消息的终端所在的位置和/或发送所述V2X消息的源小区的位置调整V2X消息的广播区域，以缩小所述V2X消息的广播区域，解决了相关技术中V2X消息广播区域过大的问题，减少了相关技术中在广播时无线空口中无线资源的浪费，也节省了V2X消息广播消息接收终端的耗电量。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明相关技术中V2V业务的场景示意图；
图2是根据本发明实施例的车联网通信V2X消息的广播方法的流程图；
图3是根据本发明实施例的MBMS承载的建立方法的流程图；
图4是根据本发明实施例的另一种MBMS承载的建立方法的流程图；
图5是根据本发明实施例的另一种车联网通信V2X消息的广播方法的流程图；
图6是根据本发明可选实施例1的流程图；
图7是根据本发明可选实施例的基站间信息交互的信令流程图；
图8是根据本发明可选实施例2的流程图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
在本实施例中提供了一种车联网通信V2X消息的广播方法，该方法可以应用在MBMS网关(Gateway，简称为GW)上，图2是根据本发明实施例的车联网通信V2X消息的广播方法的流程图，如图2所示，该流程包括如下步骤：
步骤S202，建立用于广播车联网通信V2X消息的MBMS承载；
步骤S204，接收V2X消息，并根据终端位置和/或小区位置调整V2X消息的广播区域得到指定广播区域，其中，终端位置为发送V2X消息的终端所在的位置，小区位置为发送V2X消息的源小区的位置；
步骤S206，通过MBMS承载在指定广播区域内广播发送V2X消息。
通过上述步骤，采用首先建立用于广播车联网通信V2X消息的MBMS承载，接收V2X消息，并根据终端位置和/或小区位置调整所述V2X消息的广播区域得到指定广播区域，其中，所述终端位置为发送所述V2X消息的终端所在的位置，所述小区位置为发送所述V2X消息的源小区的位置，最后通过所述MBMS承载在所述指定广播区域内广播发送所述V2X消息，通过V2X消息的终端所在的位置和/或发送所述V2X消息的源小区的位置调整V2X消息的广播 区域，以缩小所述V2X消息的广播区域，解决了相关技术中V2X消息广播区域过大的问题，减少了相关技术中在广播时无线空口中无线资源的浪费，也节省了V2X消息广播消息接收终端的耗电量。
在本实施例中，建立一个用于广播V2X消息的MBMS承载，MBMS承载对应着一个广播区域以及一个TMGI。通过MBMS承载广播发送V2X消息。通过MBMS承载传输的V2X信息的广播区域被包含在MBMS承载对应的广播区域之中。网络侧根据发送V2X消息的UE的位置和/或发送V2X消息的源小区动态调整广播区域。
可选的，源小区为发送V2X消息的终端当前连接的小区。
可选的，建立一个用于广播V2X消息的MBMS承载包括：
MBMS GW接收到来自BM-SC的会话启动请求消息后，向BM-SC发送会话启动响应消息，为每个小区分配一个IP组播地址和C-TEID，并通过会话启动请求消息将IP组播地址和C-TEID发给移动性管理实体(Mobile Management Entity，简称为MME)
可选的，小区可通过X2接口向相邻小区通发送被分配的IP组播地址和C-TEID信息。
可选的，小区接收到相邻小区发送被分配的IP组播地址和C-TEID信息后，确定是否需要加入该IP组播组，或者，MBMS GW接收到来自BM-SC的会话启动请求消息后，向BM-SC发送会话启动响应消息，为每个小区以及该小区的相邻小区分配一个IP组播地址和C-TEID,并通过会话启动请求消息将IP组播地址和C-TEID发给MME，在本实施例中，相邻小区可以同时包括直接相邻和间接相邻的小区，间接相邻即通过中间区域与该小区相邻，该中间区域是与该小区直接相邻的。
可选的，建立MBMS承载包括：MBMS GW创建MBMS承载上下文时不再分配IP组播地址，eNB在MBMS会话启动响应消息中发送用于某个MBMS会话接收的IP地址以及C-TEID，可选的，可以在不同的小区分配不同的C-TEID。MBMS GW获得各个eNB或者各个小区用于各个TMGI的IP地址以及TEID。
可选的，通过建立的MBMS承载广播发送V2X消息包括：当BM-SC发送V2X数据包给MBMS-GW时，携带源小区信息，MBMS GW接收到V2X消息后，将该消息通过对应于该源小区的IP组播地址和C-TEID进行组播发送，那么，源小区以及加入该组播组的相邻小区可以接收到来自源小区的MBMS数据。可选的，源小区为发送V2X消息的终端当前连接的小区。
可选的，当BM-SC发送数据包给MBMS-GW时，携带目标小区列表信息，MBMS GW将MBMS数据以单播的方式发给对应的基站/小区。
在本实施例中提供了一种车联网通信V2X消息的广播装置，该装置可以独立使用也可以设置在其他设备上，如应用在MBMS GW上，该装置包括：
处理模块，设置为建立用于广播车联网通信V2X消息的多媒体广播多播业务MBMS承载， 以及接收所述V2X消息；
调整模块，设置为根据发送所述V2X消息的终端所在的位置和/或发送所述V2X消息的源小区的位置调整所述V2X消息的广播区域得到指定广播区域；
发送模块，设置为通过所述MBMS承载在所述指定广播区域内广播发送所述V2X消息。
对应的，上述方法实施例中的方法也可以以单元或者子模块的方式设置在本申请的车联网通信V2X消息的广播装置中，并实现相同的功能。
在本实施例中还提供了一种MBMS承载的建立方法，该方法可以应用在V2X服务器和/或BM-SC上，图3是根据本发明实施例的MBMS承载的建立方法的流程图，如图3所示，该流程包括如下步骤：
步骤S302，以小区/小区组为单位建立一个或多个MBMS承载；
步骤S304，为每个MBMS承载会话分配一个临时移动组标识TMGI和一个广播区域；
步骤S306，将激活MBMS承载请求或者会话建立请求发送给网络侧网元；
其中，MBMS承载用于网络侧网元广播发送V2X消息。
在本实施例中，V2X服务器和/或BM-SC以小区或者小区组为单位建立MBMS承载会话，为每个MBMS会话分配一个TMGI和一个广播区域。网络侧通过MBMS承载广播发送V2X消息。
可选的，V2X服务器和/或BM-SC可以根据V2X业务类型的不同以小区或者小区组为单位建立一个或者多个MBMS承载会话。
可选的，V2X服务器和/或BM-SC以小区或者小区组为单位建立MBMS承载会话，为每个MBMS会话分配一个广播区域还包括：MBMS会话的广播区域为源小区以及该小区的所有相邻小区。源小区为发送V2X消息的终端当前连接的小区；或者，MBMS会话的广播区域为一个基站或者一个小区。
可选的，当两个MBMS会话的广播区域之间不存在重叠区域的时候，这两个会话可以分配相同的TMGI。
可选的，当V2X首次接收到来自某个小区的UE的V2X数据时，V2X服务器发送一个激活MBMS承载请求信息给BM-SC，承载请求信息包括MBMS广播区域。
可选的，网络侧通过MBMS承载广播发送V2X消息包括：
V2X服务器接收到V2X消息数据包后，可选的，还需要接收会话建立响应信息，确认对端网元完成承载建立后，再执行传输V2X消息的流程，再发送给BM-SC，V2X服务器或BM-SC鉴别该数据包对应于哪个MBMS承载，并投递到对应的承载进行IP广播传输；或者，当V2X服务器接收到V2X消息后，判断该消息目标广播小区为一个或者多个小区，此后，V2X服务 器或BM-SC鉴别出一个或者多个小区对应的MBMS承载，将V2X消息数据包投递到对应的一个或者多个承载进行广播传输。
可选的，当V2X服务器判断在哪些区域进行广播的依据包括：国家政策规定的区域；V2X业务类型；V2X信息对应的交通事故的严重程度以及波及范围；UE的授权范围/地理位置。
本实施例提供了一种MBMS承载的建立装置，用于实现上述MBMS承载的建立方法的对应功能。
在本实施例中还提供了另一种MBMS承载的建立方法，该方法可以应用在V2X服务器和/或BM-SC上，图4是根据本发明实施例的另一种MBMS承载的建立方法的流程图，如图4所示，该流程包括如下步骤：
步骤S402，以终端为单位建立一个或多个MBMS承载；
步骤S404，为每个MBMS承载会话分配一个临时移动组标识TMGI和一个广播区域；
步骤S406，将MBMS承载激活请求或会话建立请求发送给网络侧网元；
其中，MBMS承载用于网络侧网元广播发送V2X消息。
在本实施例中，V2X服务器和/或BM-SC以UE为单位建立MBMS承载，为每个MBMS会话分配一个TMGI和一个广播区域。网络侧通过MBMS承载广播发送V2X消息。
可选的，考虑根据V2X业务类型的不同以UE为单位建立一个或者多个MBMS会话。
可选的，当V2X服务器首次接收到来自某个UE的V2X数据时，V2X服务器发送一个激活MBMS承载请求信息给BM-SC，V2X服务器或者BM-SC根据V2X消息中的地理位置信息判断出广播区域信息列表，并将该广播区域信息列表通过会话建立请求信息发送给MBMS GW。
可选的，当UE发生切换或者移动到其他区域时，V2X服务器或者BM-SC根据V2X消息中的地理位置信息判断出广播消息列表发生改变，则BM-SC可发起会话更新过程更新广播区域。
可选的，V2X服务器或者BM-SC根据V2X消息中的地理位置信息判断出广播消息列表的依据包括：国家或者区域政策规定的广播区域；V2X业务类型；V2X信息对应的交通事故的严重程度以及波及范围；UE的授权范围/地理位置。
本实施例提供了一种MBMS承载的建立装置，用于实现上述MBMS承载的建立方法的对应功能。
在本实施例中提供了另一种车联网通信V2X消息的广播方法，该方法可以应用在基站和/或路边单元设备，可选的，路边单元设备包括但不限于为：旁路的基站、旁路的终端，图5是根据本发明实施例的另一种车联网通信V2X消息的广播方法的流程图，如图5所示，该流程包括如下步骤：
步骤S502，接收V2X消息；
步骤S504，解析V2X消息得到V2X消息的目标广播小区；
步骤S506，在目标广播小区内广播发送V2X消息。
在本实施例中，当基站接收到MBMS承载消息后，判断该消息是否是V2X消息，如果不是V2X消息，则进行广播，如果是V2X消息，则进一步解析应用层消息，根据消息中包含的位置信息判断是否需要进行广播以及需要在哪些小区进行广播。如果需要在基站下的小区进行广播，基站通过空口发送MBMS消息。可选的，可以通过空口来进行广播发送V2X消息。
可选的，判断该消息是否是V2X消息包括：通过MBMS承载标识来判断承载是否携带V2X消息；或者，通过MBMS承载会话对应的TMGI来判断承载是否携带V2X消息；
可选的，根据消息中包含的位置信息判断是否需要进行广播以及需要在哪些小区进行广播的依据包括：国家政策规定的区域、V2X业务类型、V2X信息对应的交通事故的严重程度以及波及范围、UE的授权范围/地理位置。
在本实施例中提供了另一种车联网通信V2X消息的广播装置，该装置可以独立使用也可以设置在其他设备上，如应用在小区基站上，或路边单元设备，可选的，路边单元设备还包括旁路的基站和旁路的终端，该装置包括：
接收模块，设置为接收V2X消息；
解析模块，设置为解析V2X消息得到V2X消息的目标广播小区；
发送模块，设置为在目标广播小区内广播发送V2X消息。
对应的，上述方法实施例中的方法也可以以单元或者子模块的方式设置在本申请的车联网通信V2X消息的广播装置中，并实现相同的功能。
在本实施例中提供了另一种车联网通信V2X消息的广播方法，应用在终端侧，包括如下步骤：
步骤S602，根据终端所在位置的地理位置信息确定目标广播区域；
步骤S604，将所述目标广播区域的信息发送给网络侧设备，其中，所述目标广播区域为广播V2X消息的区域。
本实施例还提供了一种车联网通信V2X消息的广播装置，应用在终端侧，包括：
确定模块，设置为根据终端所在位置的地理位置信息确定目标广播区域；
发送模块，设置为将所述目标广播区域的信息发送给网络侧设备，其中，所述目标广播区域为广播V2X消息的区域。
根据上述实施例，与相关技术相比，可以灵活动态的配置广播机制，从而避免消息可能 在过大的区域内广播而导致在无线空口中无线资源的大量浪费以及大量UE被迫地接收到了与其无关的数据包的问题，从而节省了接收UE的耗电量。
下面结合根据本发明的可选实施例进行完整的说明：
可选实施例1：
在本实施例中，假设终端A发送V2X消息，且需要网络侧帮忙广播，那么终端A可与将该V2X消息通过上行蜂窝网络发送给服务基站进而发送到V2X服务器，V2X服务器再通过MBMS机制将该V2X消息广播发送下来。为实现这一流程，网络侧需要先建立好MBMS承载，然后再通过建立的MBMS承载广播发送V2X消息。其中，UE为终端，E-UTRAN和UTRAN分别为全球移动通信***无线接入网(Universal Mobile Telecommunication System Radio Access Network，简称为UTRAN)，演进的UTRAN(Evolved UTRAN，简称为E-UTRAN)，MME/SGSN分别为移动性管理实体，服务GPRS支持节点(Serving GPRS Supporting Node，简称为SGSN)。
图6是根据本发明可选实施例1的流程图，如图6所示，包括：
步骤S60(图6中未示出)：当V2X服务器想要激活一个MBMS承载的时候，V2X服务器发送一个激活MBMS承载请求信息给BM-SC，激活MBMS承载请求信息包括但不限与TMGI,服务质量(Quality of Service，简称为QoS),MBMS广播区域以及开始时间。其中，TMGI是可选的。其中，MBMS广播区域参数包括一个MBMS服务区id列表和/或小区id列表。
其中，V2X服务器可以原先激活一个MBMS承载，也可以当第一次接收到需要通过MBMS承载传输的V2X消息后再进行激活。
步骤S61：BM-SC向MBMS GW发送会话启动请求消息Session Start Request，BM-SC在MBMS会话启动请求消息中携带广播区域信息。
步骤S62：MBMS GW向BM-SC发送会话启动响应消息Session Start Response；
步骤S63：MBMS GW创建MBMS承载上下文，为广播区域内的每个小区或者小区组分配一个IP组播地址和C-TEID，之后将包含IP组播地址和C-TEID信息的会话启动请求信息Session Start Request发送给MME。
图7是根据本发明可选实施例的基站间信息交互的信令流程图,如图7所示，小区可通过X2接口向相邻小区通发送被分配的IP地址和C-TEID信息。
小区接收到相邻小区发送的被分配的IP地址和C-TEID信息后，确定是否需要加入该IP组播组；或者，MBMS GW创建MBMS承载上下文，将广播区域内的小区划分成多种小区组，不同小区组的小区可能存在重叠。之后为每个小区组分配一个IP组播地址和C-TEID，并将包含IP组播地址和C-TEID信息的会话启动请求信息发送给MME。
步骤S64：MME收到该信息后，创建MBMS承载上下文，向MCE/eNB发送会话启动请 求信息Session Start Request。并在会话启动请求信息中包括该小区的IP组播地址和C-TEID。如果该小区处于多个小区组中，则可能被分配多个IP组播地址和C-TEID。
步骤S65：基站/MCE向MME发送会话启动响应消息Session Start Response。
步骤S66：MME向MBMS GW发送会话启动响应消息Session Start Response。
步骤S67：基站向终端发送会话启动信息RAN Resource Setup；
步骤S68：基站加入IP多播组IP Multicast Join，接收MBMS用户面数据。
网络侧建立好MBMS承载后，当V2X服务器或者BM-SC接收到V2X消息数据包后，再将该数据包发送给MBMS-GW时，同时携带源小区信息，MBMS GW接收到V2X消息后，将该消息对应于该源小区的IP组播地址和C-TEID进行组播发送，那么，源小区以及加入该组播组的相邻小区可以接收到本地区域的MBMS数据。
可选实施例2
图8是根据本发明可选实施例2的流程图，如图8所示，本实施例与可选实施例1相似，存在的差别如下：
在承载建立过程中的区别包括：
在步骤S73中，MBMS GW创建MBMS承载上下文时不再分配IP组播地址，
在步骤S75和S76中，基站在MBMS会话启动响应消息中发送用于某个MBMS会话接收的IP地址以及C-TEID(可以考虑不同的小区分配不同的C-TEID)。MBMS GW获得各个eNB或者各个小区用于各个TMGI的IP地址以及TEID。
在承载建立完成后，当V2X服务器或者BM-SC接收到V2X消息数据包后，再将该数据包发送给MBMS-GW时，同时携带目标小区信息，MBMS GW接收到V2X消息后，利用获得的IP地址以及C-TEID信息将MBMS数据以单播的方式发给对应的目标基站/小区。
可选实施例3
在本实施例中，V2X服务器和/或BM-SC以小区为单位建立MBMS承载会话，为每个MBMS会话分配一个TMGI和一个广播区域。之后，网络侧通过MBMS承载广播发送V2X消息。
具体地：V2X服务器和/或BM-SC以小区为单位建立MBMS承载会话流程包括以下步骤：
步骤S81：当V2X服务器想要激活一个MBMS承载的时候，V2X服务器发送一个激活MBMS承载请求信息给BM-SC。
步骤S82：BM-SC向MBMS GW发送会话启动请求消息，BM-SC在MBMS会话启动请求消息中携带广播区域。
其中，V2X服务器和/或BM-SC可以根据V2X业务类型的不同以小区或者小区集合为单位建立一个或者多个MBMS承载会话。
MBMS会话的广播区域为源小区以及该小区的所有相邻小区。
可选的，当两个MBMS会话的广播区域之间不存在重叠区域的时候，这两个会话可以分配相同的TMGI。
步骤S83：MBMS GW向BM-SC发送会话启动响应消息后，创建MBMS承载上下文，分配IP组播地址和C-TEID，之后将(TMGI,Flow Identifier,QoS,MBMS service Area,list of cell IDs if available,Session identifier,estimated session duration,transport network IP Multicast Address(es),IP address(es)of the multicast source,C-TEID,...)信息发送给MME。
步骤S84：MME收到该信息后，创建MBMS承载上下文，向MCE/eNB发送会话启动请求信息。
步骤S85：基站向MCE/MME发送会话启动响应消息。
步骤S86：基站向终端发送会话启动信息。
步骤S87：基站加入IP多播组，接收MBMS用户面数据。
步骤S88：基站通过空口发送MBMS数据。
之后，网络侧通过MBMS承载广播发送V2X消息包括：
V2X服务器接收到V2X消息数据包后，再发送给BM-SC，V2X服务器或BM-SC鉴别该数据包来自哪个源小区，从而确定对应于哪个MBMS承载，并投递到对应的承载进行IP广播传输；或者，V2X服务器接收到V2X消息数据包后，再发送给BM-SC，V2X服务器或BM-SC根据V2X数据包中的地理位置信息，从而确定其广播范围，进一步确定对应于哪个MBMS承载，并投递到对应的承载进行IP广播传输。
可选的，当V2X服务器判断在哪些区域进行广播的依据包括：国家政策；V2X业务类型；V2X信息对应的交通事故的严重程度以及波及范围；UE的授权范围/地理位置。
可选实施例4
本实施例与可选实施例3相似，存在的差别如下：
在承载建立过程中的区别包括：
在本实施例的步骤S91和步骤S92中，V2X服务器和/或BM-SC可以根据V2X业务类型的不同以小区为单位建立一个或者多个MBMS承载会话。
MBMS会话的广播区域为一个基站或者一个小区。
对于V2X业务相同，广播区域不同的MBMS会话V2X服务器和/或BM-SC可以为他们 分配相同的TMGI。
之后，网络侧通过MBMS承载广播发送V2X消息包括：
当V2X服务器接收到V2X消息后，判断该消息目标广播小区为一个或者多个小区，然后，V2X服务器或BM-SC鉴别出一个或者多个小区对应的MBMS承载，将V2X消息数据包投递到对应的一个或者多个承载进行广播传输。
可选的，当V2X服务器判断在哪些区域进行广播的依据包括：国家政策；V2X业务类型；V2X信息对应的交通事故的严重程度以及波及范围；UE的授权范围/地理位置。
可选实施例5
在本实施例中，V2X服务器和/或BM-SC以UE为单位建立MBMS承载，为每个MBMS会话分配一个TMGI和一个广播区域。
可以根据V2X业务类型的不同以UE为单位建立一个或者多个MBMS会话。
假设车辆B启动后，首次发送V2X消息，并通过蜂窝网上传到V2X服务器。
步骤S101：当V2X服务器首次接收到来自车辆B的V2X数据时，V2X服务器发送一个激活MBMS承载请求信息给BM-SC；
步骤S102：V2X服务器或者BM-SC根据V2X消息中的地理位置信息判断出广播区域信息列表，并将该广播区域信息列表通过会话建立请求信息发送给MBMS GW。
其中，判断在哪些区域进行广播的依据包括：国家政策；V2X业务类型；V2X信息对应的交通事故的严重程度以及波及范围；UE的授权范围/地理位置。
步骤S103：MBMS GW向BM-SC发送会话启动响应消息后，创建MBMS承载上下文，分配IP组播地址和C-TEID，之后将会话启动请求信息发送给MME。
步骤S104：MME收到该信息后，创建MBMS承载上下文，向MCE/eNB发送会话启动请求信息。
步骤S105：基站向MCE/MME发送会话启动响应消息。
步骤S106：基站向终端发送会话启动信息。
步骤S107：基站加入IP多播组，接收MBMS用户面数据。
步骤S108：基站通过空口发送MBMS数据。
当车辆B发生切换或者移动到其他区域时，V2X服务器或者BM-SC根据V2X消息中的地理位置信息判断出广播消息列表发生改变，则BM-SC可发起会话更新过程更新广播区域。
当承载建立完成后，网络侧通过MBMS承载广播发送V2X消息。具体地，当V2X服务器接收到来自车辆B的V2X数据时，判断出车辆B对应的MBMS承载，将V2X消息数据包 投递到对应的承载进行广播传输。
可选实施例6
本实施中承载建立的流程与现有技术或者以上实施例类似，区别在于用户面数据的传输。在MBMS承载建立成功后，当基站接收到MBMS承载消息后，判断该消息是否是V2X消息，如果是V2X消息，则进一步解析应用层消息，根据消息中包含的位置信息判断是否需要进行广播以及需要在哪几个小区进行广播。如果需要在基站下的小区进行广播，基站通过空口发送MBMS消息。
可选的，判断该消息是否是V2X消息包括：通过MBMS承载标识来判断承载是否携带V2X消息；或者，通过MBMS承载会话对应的TMGI来判断承载是否携带V2X消息。
可选的，根据消息中包含的位置信息判断是否需要进行广播以及需要在哪几个小区进行广播的依据包括：国家政策；V2X业务类型；V2X信息对应的交通事故的严重程度以及波及范围；UE的授权范围/地理位置。
可选实施例7
本实施中承载建立的流程与现有技术或者以上实施例类似，区别在于用户面数据的传输。在MBMS承载建立成功后，当基站接收到MBMS承载消息后，判断该消息是否是V2X消息，如果是V2X消息，则进一步解析应用层消息，根据消息中包含的位置信息判断是否需要进行广播以及需要在哪几个小区进行广播。如果需要在基站下的小区进行广播，基站通过空口发送MBMS消息。
当基站接收到终端发送的数据消息后，判断该消息是否是V2X消息，如果不是V2X消息，则发送给上层网元，如果是V2X消息，则解析V2X消息得到V2X消息的目标广播小区，包括以下两种方式：
解析V2X消息的应用层得到V2X消息的地理位置信息和/或业务类型信息，从而得到目标广播小区信息；
解析V2X消息的IP头信息，根据IP头信息获得目标广播小区信息。
可选的，根据消息中包含的位置信息判断是否需要进行广播以及需要在哪几个小区进行广播的依据包括：国家政策；V2X业务类型；V2X信息对应的交通事故的严重程度以及波及范围；UE的授权范围/地理位置。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例的方法。
本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：
S1，建立用于广播车联网通信V2X消息的MBMS承载，以及接收V2X消息；
S2，根据发送V2X消息的终端所在的位置和/或发送V2X消息的源小区的位置调整V2X消息的广播区域得到指定广播区域；
S2，通过MBMS承载在指定广播区域内广播发送V2X消息。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(Read-Only Memory，简称为ROM)、随机存取存储器(Random Access Memory，简称为RAM)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行建立用于广播车联网通信V2X消息的MBMS承载，以及接收V2X消息；
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行根据发送V2X消息的终端所在的位置和/或发送V2X消息的源小区的位置调整V2X消息的广播区域得到指定广播区域；
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行通过MBMS承载在指定广播区域内广播发送V2X消息。
可选地，本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
如上所述，本发明实施例提供的一种车联网通信V2X消息的广播方法及装置、MBMS承载的建立方法具有以下有益效果：解决了解决相关技术中V2X消息广播区域过大的问题，减少了相关技术中在广播时无线空口中无线资源的浪费，也节省了V2X消息广播消息接收终端的耗电量。

Claims (30)

  1. 一种车联网通信V2X消息的广播方法，包括：
    建立用于广播车联网通信V2X消息的多媒体广播多播业务MBMS承载；
    接收V2X消息，并根据终端位置和/或小区位置调整所述V2X消息的广播区域得到指定广播区域，其中，所述终端位置为发送所述V2X消息的终端所在的位置，所述小区位置为发送所述V2X消息的源小区的位置；
    通过所述MBMS承载在所述指定广播区域内广播发送所述V2X消息。
  2. 根据权利要求1所述的方法，其中，在建立用于广播车联网通信V2X消息的多媒体广播多播业务MBMS承载之后，所述方法还包括：
    接收来自广播/组播业务中心BM-SC的会话启动请求消息；
    为广播区域的每个第一小区和/或第二小区分配一个IP组播地址和小区隧道端点标识C-TEID，其中，所述IP组播地址和所述C-TEID用于标识所述第一小区和/或第二小区的地址，其中，所述第二小区与所述第一小区直接或间接相邻；
    通过会话启动请求消息将所述IP组播地址和所述C-TEID发给移动性管理实体MME。
  3. 根据权利要求2所述的方法，其中，在为广播区域的每个第一小区分配一个IP组播地址和小区隧道端点标识C-TEID之后，还包括：
    所述广播区域内的第一小区通过X2接口向所述第二小区发送所述第一小区被分配的IP组播地址和C-TEID信息；
    所述第二小区在接收到所述IP组播地址和C-TEID信息后反馈的用于确认是否加入所述广播区域的响应消息。
  4. 根据权利要求1所述的方法，其中，在建立用于广播车联网通信V2X消息的MBMS承载之前，所述方法还包括：
    接收eNB发送的MBMS会话启动响应消息，其中，所述MBMS会话启动响应消息中携带用于接收所述MBMS会话的IP地址和C-TEID。
  5. 根据权利要求4所述的方法，其中，在所述eNB管辖有多个小区时，所述MBMS会话启动响应消息中携带与每个小区对应的所述IP地址。
  6. 根据权利要求1所述的方法，其中，所述V2X消息中携带有发送所述V2X消息的源小区信息，其中，所述源小区信息包括源小区的ID标识；通过所述MBMS承载在所述指定广播区域内广播发送所述V2X消息包括：
    通过所述MBMS承载以组播的方式将所述V2X消息发送给与所述源小区信息对应的源小区和/或与所述源小区相邻的小区。
  7. 根据权利要求1所述的方法，其中，通过所述MBMS承载在所述指定广播区域内广播发送所述V2X消息包括：
    接收所述V2X消息，以及接收所述V2X消息的目标小区列表信息，其中，所述目标小区列表信息包括目标小区的ID标识；
    通过所述MBMS承载以单播的方式将所述V2X消息发送给与所述目标小区信息对应的小区和/或基站。
  8. 一种MBMS承载的建立方法，包括：
    以小区/小区组为单位建立一个或多个MBMS承载；
    为每个所述MBMS承载会话分配一个临时移动组标识TMGI和一个广播区域；
    将激活MBMS承载请求或者会话建立请求发送给网络侧网元；
    其中，所述MBMS承载用于所述网络侧网元广播发送V2X消息。
  9. 根据权利要求8所述的方法，其中，所述以小区/小区组为单位建立一个或多个MBMS承载包括：根据所述V2X消息的V2X业务类型，以小区/小区组为单位建立一个或多个与所述V2X业务类型对应的MBMS承载。
  10. 根据权利要求8所述的方法，其中，所述广播区域包括：所述源小区和与所述源小区相邻的小区。
  11. 根据权利要求8所述的方法，其中，所述广播区域包括一个基站的覆盖区域或一个小区。
  12. 根据权利要求8所述的方法，其中，以小区/小区组为单位建立多个MBMS承载，且其中两个MBMS承载的广播区域之间不存在重叠区域的时，为所述两个MBMS承载分配相同的TMGI。
  13. 根据权利要求8所述的方法，其中，在所述以小区/小区组为单位建立一个或多个MBMS承载包括：
    判断接收到的V2X消息的目标广播区域是否在已有MBMS承载的广播区域集合内；
    若判断结果为否，向网络侧网元发送激活MBMS承载请求或会话建立请求，其中，所述激活MBMS承载请求或会话建立请求信息携带有MBMS广播区域。
  14. 根据权利要求8所述的方法，其中，在将所述激活MBMS承载请求或会话建立请求发送给网络侧网元之后，所述方法还包括：
    接收所述V2X消息，并确定与所述V2X消息的目标广播小区对应的MBMS承载；
    将所述V2X消息投递到所述指定MBMS承载进行广播发送。
  15. 根据权利要求8所述的方法，其中，依据以下至少之一确定进行广播发送的广播区域： 预定义区域、V2X业务类型、所述V2X消息对应的交通事故的危险等级、所述V2X消息对应的交通事故的波及范围、小区终端的授权范围、小区终端的地理位置。
  16. 一种MBMS承载的建立方法，包括：
    以终端为单位建立一个或多个MBMS承载；
    为每个所述MBMS承载会话分配一个临时移动组标识TMGI和一个广播区域；
    将激活MBMS承载请求或会话建立请求发送给网络侧网元；
    其中，所述MBMS承载用于所述网络侧网元广播发送V2X消息。
  17. 根据权利要求16所述的方法，其中，以终端为单位建立MBMS承载包括：以终端为单位根据所述V2X消息的V2X业务类型建立一个或多个MBMS承载。
  18. 根据权利要求16所述的方法，其中，以终端为单位建立一个或多个MBMS承载包括：
    判断所述终端是否在已经建立MBMS承载的终端集合内；
    在判断结果为否时，并根据所述V2X消息中的地理位置信息判断出广播区域信息列表；
    将所述广播区域信息列表通过激活MBMS承载请求或会话建立请求信息发送给所述网络侧网元。
  19. 根据权利要求18所述的方法，其中，在将所述广播区域信息列表通过激活MBMS承载请求或会话建立请求发送给所述网络侧网元之后，所述方法还包括：
    检测所述终端所在的地理位置区域是否发生变化；
    在检测到所述终端所在的地理位置区域发生变化时，向所述网络侧网元发送用于更新所述广播区域的会话更新过程。
  20. 根据权利要求19所述的方法，其中，所述检测所述终端所在的地理位置区域是否发生变化包括：
    根据所述终端发送的V2X消息中的地理位置信息判断广播区域列表是否发生改变；
    在所述广播区域列表发生改变时，确定所述终端所在的地理位置区域发生变化。
  21. 根据权利要求16所述的方法，其中，依据以下至少之一确定进行广播发送的广播区域：预定义区域、V2X业务类型、所述V2X消息对应的交通事故的危险等级、所述V2X消息对应的交通事故的波及范围、所述终端的授权范围、所述终端的地理位置信息。
  22. 一种车联网通信V2X消息的广播方法，应用在基站侧和/或路边单元设备，包括：
    接收V2X消息；
    解析所述V2X消息得到所述V2X消息的目标广播小区；
    在所述目标广播小区内广播发送所述V2X消息。
  23. 根据权利要求22所述的方法，其中，接收V2X消息包括：接收通过MBMS承载发送的所述V2X消息。
  24. 根据权利要求22所述的方法，其中，解析所述V2X消息得到所述V2X消息的目标广播小区包括以下方式之一：
    解析所述V2X消息的应用层得到所述V2X消息的地理位置信息和/或业务类型信息，并根据所述地理位置信息和/或业务类型信息得到所述目标广播小区信息；或者
    解析所述V2X消息的IP头信息，并根据所述IP头信息获得所述目标广播小区信息。
  25. 根据权利要求23所述的方法，其中，在接收通过MBMS承载发送的所述V2X消息之前，所述方法还包括：
    通过MBMS承载标识来判断所述承载是否携带V2X消息，或，通过MBMS承载会话对应的TMGI来判断所述承载是否携带V2X消息。
  26. 根据权利要求22所述的方法，其中，依据以下至少之一得到所述V2X消息的目标广播小区：预定义区域、V2X业务类型、所述V2X消息对应的交通事故的危险等级、所述V2X消息对应的交通事故的波及范围、终端的授权范围、终端的地理位置信息。
  27. 一种车联网通信V2X消息的广播方法，应用在终端侧，包括：
    根据终端所在位置的地理位置信息确定目标广播区域；
    将所述目标广播区域的信息发送给网络侧设备，其中，所述目标广播区域为广播V2X消息的区域。
  28. 一种车联网通信V2X消息的广播装置，包括：
    处理模块，设置为建立用于广播车联网通信V2X消息的多媒体广播多播业务MBMS承载；
    调整模块，设置为接收V2X消息，并根据终端位置和/或小区位置调整所述V2X消息的广播区域得到指定广播区域，其中，所述终端位置为发送所述V2X消息的终端所在的位置，所述小区位置为发送所述V2X消息的源小区的位置；
    发送模块，设置为通过所述MBMS承载在所述指定广播区域内广播发送所述V2X消息。
  29. 一种车联网通信V2X消息的广播装置，应用在基站侧和/或路边单元设备，包括：
    接收模块，设置为接收V2X消息；
    解析模块，设置为解析所述V2X消息得到所述V2X消息的目标广播小区；
    发送模块，设置为在所述目标广播小区内广播发送所述V2X消息。
  30. 一种车联网通信V2X消息的广播装置，应用在终端侧，包括：
    确定模块，设置为根据终端所在位置的地理位置信息确定目标广播区域；
    发送模块，设置为将所述目标广播区域的信息发送给网络侧设备，其中，所述目标广播区域为广播V2X消息的区域。
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