WO2017171467A1

WO2017171467A1 - V2x message transmitting method and apparatus

Info

Publication number: WO2017171467A1
Application number: PCT/KR2017/003549
Authority: WO
Inventors: Hong Wang; Lixiang Xu; Xiaowan KE
Original assignee: Samsung Electronics Co., Ltd.
Priority date: 2016-04-01
Filing date: 2017-03-31
Publication date: 2017-10-05
Also published as: CN107295471A

Abstract

The present disclosure relates to a pre-5^th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4^th-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure provides a V2X message transmitting method and apparatus, which includes obtaining, by a MCE, location information of a user equipment (UE) and a type of a V2X message, determining, by the MCE, a service area for broadcasting the V2X message; transmitting, by the MCE, the service area to a base station within the service area, so that the base station transmits the V2X message. According to the present disclosure, it can be supported to transmit the V2X message according to the location of the UE, thereby reducing transmission burden of air interface.

Description

V2X MESSAGE TRANSMITTING METHOD AND APPARATUS

The present disclosure relates to wireless communication technologies, and more particularly, to a Vehicle to Everything (V2X) message transmitting method and apparatus.

To meet the demand for wireless data traffic having increased since deployment of 4G communication systems, efforts have been made to develop an improved 5G or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a 'Beyond 4G Network' or a 'Post LTE System'.

The 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 60GHz bands, so as to accomplish higher data rates. To decrease propagation loss of the radio waves and increase the transmission distance, the beamforming, massive multiple-input multiple-output (MIMO), Full Dimensional MIMO (FD-MIMO), array antenna, an analog beam forming, large scale antenna techniques are discussed in 5G communication systems.

In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud Radio Access Networks (RANs), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), reception-end interference cancellation and the like.

In the 5G system, Hybrid FSK and QAM Modulation (FQAM) and sliding window superposition coding (SWSC) as an advanced coding modulation (ACM), and filter bank multi carrier(FBMC), non-orthogonal multiple access(NOMA), and sparse code multiple access (SCMA) as an advanced access technology have been developed.

Current mobile communication increasingly tends to provide multimedia services with high rate transmission for users. FIG. 1 is a schematic diagram illustrating system architecture of a System Architecture Evolution (SAE).

In this system architecture, a user equipment (UE) 101 is a terminal device used for data reception. Evolved Universal Terrestrial Radio Access Network (E-UTRAN) 102 is a wireless transmission network, which includes a macro base station (eNodeB/NodeB) providing a wireless network interface. A Mobility Management Entity (MME) 103 is responsible for managing a mobility context, a session context, security information of the UE. A Serving Gateway (SGW) 104 mainly provides user plane functions. The MME 103 and the SGW 104 may locate in a same physical entity. A PDN gateway (PGW) 105 is mainly responsible for functions, e.g., billing and lawful interception, may also be located in a same physical entity with the SGW 104. A Policy and Charging Rules Function (PCRF) 106 provides QoS strategies and billing rules. A Serving GPRS Support Node (SGSN) 108 is a network node equipment for providing routing for data transmission in Universal Mobile Telecommunications System (UNTS). A Home Subscriber Server (HSS) 109 is a home belonging sub-system of the UE, and is responsible for protecting user information including such as a current location of the user equipment, an address of a server node, user security information, and packet data context of the user equipment.

With fast development of vehicles, road security problems become increasingly prominent. For frequent occurrences of traffic accidents, it is more and more limited to use traditional methods to reduce the traffic damages, e.g., improving traffic infrastructures, enhancing security education. Thus, information communication technology can be used, so that people can make abstract determination about environment around vehicles through communication between vehicles and vehicles, and communication between vehicles and roadside facilities. If it is detected that road damage conditions occur, warnings can be provided for the driver and another vehicle in time to avoid traffic crashes. These technologies are referred to as V2X, i.e., communication from Vehicle to Everything, which is a key technology of a further intelligent traffic system. Damage caused by traffic accidents can be effectively reduced by the V2X technology.

The V2X includes Vehicle-to-Vehicle (V2V) communication, Vehicle-to-Infrastructure (V2I) communication and Vehicle-to-Pedestrian (V2P) communication. The three V2X communication mechanisms can provide intelligent traffic for drivers through mutual perception. The transmission devices, e.g., vehicles, infrastructures, and pedestrians, can collect information about environment around them by using information transmitted from other vehicles or sensors, and provide more intelligent traffics by sharing the information, e.g., collision warnings or automatic driving. The intelligent traffics can be divided into three categories as follows.

A first category is related with road security, which includes that: 1) vehicles can remind another vehicle in time when the vehicles find damages come, e.g., there are obstacles at front; 2) the vehicles can tell another vehicle their directions, so as to help the driver of another vehicle make abstract determination; 3) the vehicles can remind another vehicle when they are close to crosses; 4) the vehicles can prompt another vehicle when they get off highways; 5) warnings for temporary/sudden stop; 6) warning when the vehicles change routes; 7) damage reports; 8) vehicle drivers warns pedestrians/bicycle riders.

A second category is related to traffic efficiency, which includes assisting traffic dredging, using effective actions for congestion in real time. Management department can flexibly implement traffic rules according to detail conditions, e.g., adjustable speed limitation, variable traffic light periods and light flashing orders, automatic traffic control at crosses, roads for ambulances/fire trucks/police cars.

A third category is other application, e.g., intelligent traffic can provide automatic parking, navigation status, road sign recognition, etc. For law enforcement departments, e.g., polices, the V2X can help implementation of monitoring, speeding reminder, restricted area management, stop order etc. V2X can make collection of toll fee/parking fee more convenient by an electronic payment way, so as to relief traffic congestion in a certain extent, and reduce low speed rear-end collision always occurring around toll stations.

For the V2V traffic, in E-UTRAN, a UE (in this present disclosure, for V2V traffic, a vehicle is considered as a UE hereinafter) can interact the related information with neighbor UEs, the interaction of V2V related information needs to satisfy authentication and proximity principle in E-UTRAN. The proximity principle is configured by operators, V2V related information can still be interacted when the UE is not within a E-UTRAN service area. The UEs supporting the V2V application transmits application information, e.g., information such as its location, attribute. A length of the V2V application message is variable in order to apply to different information content, the operator can configure to periodically transmit the V2V message. A V2V message is mainly the broadcast message. The V2V message can be directly transmitted to a neighbor UE, or can be transmitted to another UE through Road Side Unit (RSU).

For the V2I traffic, a UE supporting the V2I application (in this present disclosure, for V2I traffic, a vehicle is considered as a UE hereinafter) transmits application information to a RSU, the RSU transmits the application information to one or a group of UEs supporting the V2I application.

For the V2P traffic, in E-UTRAN, a UE supporting the V2P application (in this present disclosure, for V2I traffic, a vehicle is considered as a UE hereinafter) can interact V2P related information with neighbor UEs, the interaction of V2V related information needs to satisfy authentication and proximity principle in E-UTRAN. The proximity principle is configured by operators, and the V2P related information can also be interacted when the UE is not within an E-UTRAN service area. A V2P message may be directly transmitted to a neighbor UE, or may be transmitted to another UE through Road Side Unit (RSU).

V2X communication may be through an application specification PC5 or a Uu interface. Each use case has a different requirement. Some use cases require that the V2X application layer can receive the V2X message in time, the V2X application generates a new downlink V2X message, and the downlink message can be received by all users in a certain range. Some uses cases only require that users in a base station can receive the downlink V2X message. The V2X transmission range is related with a detail location. For example, when a car crash event occurs on a road, the UE equipping a V2X function transmits the car crash event to the V2X server, the V2X server determines that the car crash event is transmitted to all cars on the road. Thus, the location where the V2X event occurs needs to be considered for the downlink V2X transmission. In addition, the car crash event may be reported by different vehicles, and the V2X server needs to be able to distinguish whether these reports is a same event, or different events. According to current technologies, it is not solved how the V2X server determines the V2X broadcast content and how broadcast is performed according to the location where the V2X event is transmitted.

The present disclosure provides a method and apparatus for transmitting a V2X message according to a location of a UE.

A Multimedia Broadcast/Multicast Service (MBMS) Coordination Entity (MCE) obtains location information of the UE and a type of a V2X message;

the MCE determines a service area for broadcast;

the MCE notifies the range for the broadcast to a related base station within the service area for the broadcast; and

the V2X message is broadcasted in the related base station.

The UE is a UE which transmits the V2X message. The UE detects a V2X event, and transmits the V2X message to a server. The server determines to transmit another downlink V2X message to another UE around the UE, the downlink V2X message may include same information with the uplink V2X message, or may be another V2X message generated by the V2X server.

The present disclosure provides a method for transmitting a V2X message according to a location of a UE, which includes:

receiving, by a V2X server, location information of the UE;

determining, by the V2X message, a service area for transmission of a V2X message, transmitting a traffic start message to a BMSC, where the message includes the service area for broadcast;

transmitting, by the BMSC, a traffic start message to a core network;

transmitting, by the core network, the traffic start message to a MCE;

transmitting, by the MCE, the traffic start message to a base station within the service area;

broadcasting the V2X message in a cell in the base station.

The present disclosure a V2X server, which includes:

a receiving module, to receive a V2X message transmitted by the UE;

a service area determining module, to determine a MBMS service area corresponding to eMBMS received by the receiving module; and

a transmitting module, to establish an Enhanced Multimedia Broadcast/Multicast Service (eMBMS) bearer among a core network, the V2X server and a base station within the service area, and transmit the V2X message to the base station within the service area through the bearer.

The present disclosure provides a MCE, which includes:

a receiving module, to receive eMBMS control information transmitted by a core network;

a service area determining module, to determine a MBMS service area for eMBMS received by the receiving module; and

a transmitting module, to establish an eMBMS bearer with a base station, transmit the V2X message to the base station within the MBMS service area.

According to the method of the present disclosure, V2X traffic data can be transmitted to users in a specific area, so as to reduce occurrences of traffic accidents, improve traffic efficiency, and reduce burden of air interface message transmission.

FIG. 1 is a schematic diagram illustrating a current SAE system architecture;

FIG. 2 is a schematic diagram illustrating architecture according to the present disclosure;

FIG. 3 is a schematic diagram according to a first embodiment of the present disclosure;

FIG. 4 is a schematic diagram according to a second embodiment of the present disclosure;

FIG. 5 is a schematic diagram according to a third embodiment of the present disclosure;

FIG. 6 is a schematic diagram illustrating an apparatus according to the present disclosure.

In order to make the object, technical solution and merits of the present invention clearer, the present invention will be illustrated in detail hereinafter with reference to the accompanying drawings and specific examples.

FIG. 2 is a schematic diagram illustrating architecture according to the present disclosure.

V2X communication usually includes uplink transmission and downlink transmission. The uplink transmission means that a UE transmits a V2X message to a V2X application layer, and the downlink transmission means that the V2X application layer transmits the V2X message to the UE. In the uplink transmission, the UE transmits the V2X message to a V2X server 201 via a base station. In downlink, a broadcast/multicast mechanism is used, the V2X server 201 generates the V2X message, transmits the V2X message to a broadcast module 202, the broadcast module 202 transmits the V2X message to the base station, and then the base station transmits the V2X message to the UE. If the V2X message needs to be broadcasted within multiple base stations, the broadcast module transmits the V2X message to the multiple base stations.

FIG. 3 illustrates a first embodiment according to the present disclosure. As shown in FIG. 3, a V2X server determines a broadcast area according to a report from a UE. The UE is a device which reports the V2X message to the V2X server. The V2X server determines to generate a downlink V2X message according to the V2X message reported by the UE or according to the V2X message reported by the UE in combination with a report from another UE and information stored in the server, and transmits the V2X message to another UE configured with a V2X function around the UE.

At block 301, a UE transmits a message to a V2X server.

The message is an application layer message, and is usually transmitted to the V2X server via a user plane. The UE may report one or more kinds of information as follows:

a type or a message name of the V2X message, there are various V2X messages, which apply to different scenarios, a V2X messages is identified through a type or a name of the message;

location information of the UE, the location information may include one or more pieces of information as follows:

the location information is set to an unique identifier of a serving cell, E-UTRAN Cell Global Identifier (ECGI);

the location information is set to GPS location information, if the UE is configured with GPS, the GPS information may be reported to the V2X server;

the location information is set to a Serving Area Identifier (SAI) of a serving area to which the serving cell of the UE belongs; the UE obtains the SAI of the serving area to which the cell belongs from a broadcast message of the cell.

The message may further include:

neighbor cell information, where the UE reports an unique identifier of a neighbor cell of the serving cell, ECGI, to a V2X server, a cell identifier list may help the V2X server to determine a broadcast range of a V2X message;

an occurrence time of a V2X event corresponding to the V2X message, the time is a time when the V2X event occurs. According to the time, the V2X server may determine whether events reported by different UEs are same or different from each other. For example, if the location information reported by the UE is the ECGI the range indicated by which is large and two UEs in a same cell report a same V2X message, an application server differently determines whether V2X events are a same event, or different events. According to event occurrence times, the V2X server may make abstract determination, and notifies a V2X event to a corresponding UE in a downlink message.

At block 302, the V2X server transmits a traffic start message to a BMSC.

The V2X server receives the report from the UE, determines whether to transmit an event corresponding to a V2X message to another UE according to the UE report. According to a determination method, the information reported by the UE and some pieces of pre-stored information are considered.

If the location information of the UE received by the V2X server is set to the unique identifier of the serving cell, a type of the V2X traffic belongs to a location broadcast based traffic type. The V2X server determines a broadcast range according to pre-stored information and the identifier of the serving cell reported by the UE. For example, the V2X server pre-stores a topological relationship among cells, knows which cells are deployed among a cell, searches out neighbor cells of the serving cell according to the serving cell reported by the UE, and determines that the V2X message is broadcasted in the serving cell and a group of the neighbor cells. The V2X server transmits the traffic start message to the BMSC, where the message carries a cell identifier list. The cell list indicates that the traffic is broadcasted in corresponding cells.

If the location information of the UE received by the V2X server is set to the GPS location information, the type of the V2X traffic belongs to the location broadcast based traffic type. The V2X server determines the broadcast range according to the pre-stored information and the GPS location information. For example, the V2X server pre-stores the GPS location information, searches out messages of the cell at the location and the neighbor cells according to the transmission location where the UE reports the event, and determines that the V2X message is broadcasted in the serving cell and a group of the neighbor cells. The V2X server transmits the traffic start message to the BMSC, where the message carries the cell identifier list. The cell list indicates that the traffic is broadcasted in corresponding cells.

If the location information of the UE received by the V2X server is set to SAI or another identifier of a V2X serving range, the V2X server determines the broadcast range is the entire SAI or V2X serving range. The V2X server transmits the traffic start message to the BMSC, where the message carries the identifier of the SAI or the identifier of the V2X serving range. The identifier of the SAI indicates that the traffic is broadcasted in cells corresponding to the SAI (or the identifier of the V2X serving range). Each cell is allocated with a SAI (or the identifier of the V2X serving range), and a group of corresponding cells may be search out according to the identifier of the SAI (or the identifier of the V2X serving range).

If the V2X server receives a neighbor cell identifier reported by the UE, in combination with another piece of information reported by the UE, e.g., the serving cell identifier, and/or the GPS location information of the UE, the V2X server may determine in which cell the V2X message is broadcasted. Since the neighbor cell information is reported by the UE, the information pre-stored by the V2X server may be reduced. For example, the V2X server does not need to know deployment topology of the cell, and does not need to store the GPS location information of each cell.

If the V2X server receives the occurrence time of the event corresponding to the V2X message reported by the UE, the V2X server may uniquely determine the V2X event. For example, two car crash events occur on a road, a distance between the two car crash events is near within a same cell, but the occurrence times are different from each other. If the occurrence times are not reported by UEs and the multiple UEs reports that the car crash events occurs within the cell, the V2X server determines that a car crash event occurs. If the UEs report the occurrence times of the events, the V2X server may determine that the UEs reports two events according to the different times.

Message Description: the traffic start message transmitted by the V2X server includes information as follows:

a type of the V2X message or an indication message broadcasted by the V2X server according to the location; there are multiple categories of V2X messages, and the type of the V2X message is used to identify a category of the V2X message;

a TGMI of a V2X bearer, the TMGI is an unique identifier used to identify the an eMBMS traffic or an eMBMS bearer;

a V2X service area i.e., a broadcast range of the eMBMS. The broadcast range may be set to one or more pieces of information as follows:

the service area may be set to a list of a group of cell identifiers, i.e., a EGCI list;

the service area may be set to a list of a group of serving range identifiers, i.e., a SAI list.

At block 303, the BMSC transmits the traffic start message to a core network, wherein the traffic start message includes a traffic identifier TMGI, a broadcast range of the traffic, a traffic quality requirement. After receiving the request, the core network transmits a traffic start response message to the BMSC. The core network may include a gateway and a mobility management entity (MME). And the BMSC firstly transmits the message to the gateway, and then the gateway transmits the traffic start message to the MME.

At block 304, the core network transmits the traffic start message to a MCE, wherein the traffic start message includes a traffic identifier TMGI, a service area, and a traffic quality requirement. The MCE determines whether the MBSFN mode or a single cell point-to-multipoint is used for broadcast, and then transmits the traffic start message to the base station. If the MBMS bearer may be established with at least one base station, the MCE transmits the traffic start response to the MME.

At block 305, the MCE transmits the traffic start message to the base station. The traffic start message at least includes a traffic identifier TMGI, a service area and a traffic quality requirement.

At block 306, the base station transmits the traffic start message to the UE.

So far, the first embodiment ends.

FIG. 4 illustrates a second embodiment according to the present disclosure. As shown in FIG. 4, a MCE determines a broadcast area according to location information of a V2X message. The UE reports the location information to the V2X server. The V2X server determines to generate a downlink V2X message according to the V2X message reported by the UE or according to the V2X message reported by the UE in combination with a report from another UE and information stored in the server, and transmits the V2X message to another UE configured with a V2X function around the UE.

At block 401, the UE transmits a message to a V2X server.

The message is an application layer message. The UE may report one or more kinds of information as follows:

a type of a V2X message,

the location information of the UE is set to an unique identifier of a serving cell, ECGI;

the location information of the UE is set to GPS location information, if the UE is configured with GPS, the GPS information may be reported to the V2X server;

the location information of the UE is set to a Serving Area Identifier of a serving area to which the serving cell of the UE belongs, e.g., SAI.

The message may further include information as follows.

an occurrence time of a V2X event corresponding to the V2X message. According to the time, the V2X server may determine whether events reported by different UEs are same or different from each other.

At block 402, the V2X server transmits a traffic start message to a BMSC.

If the location information of the UE received by the V2X server is set to the GPS location information, the type of the V2X traffic belongs to the location broadcast based traffic type. The V2X server transmits the traffic start message to the BMSC.

If the location information of the UE received by the V2X server is set to SAI, the V2X server determines the broadcast range is the entire SAI. The V2X server transmits the traffic start message to the BMSC, where the message carries the identifier of the SAI. The identifier of the SAI indicates that the traffic is broadcasted in cells corresponding to the SAI. Each cell is allocated with a SAI, and a group of corresponding cells may be search out according to the identifier of the SAI.

If the V2X server receives a neighbor cell identifier reported by the UE, in combination with another piece of information reported by the UE, the V2X server may determine in which cell the V2X message is broadcasted. Since the neighbor cell information is reported by the UE, the information pre-stored by the V2X server may be reduced.

a type of the V2X message;

a TGMI of a V2X bearer;

a V2X service area, i.e., a broadcast range of the eMBMS. The broadcast range may be set to one or more pieces of information as follows:

the service area may be set to a list of a group of serving range identifiers, i.e., a SAI list;

The service area is set to the GPS location information. The information indicates the GPS location transmitted by the V2X event. The information further includes range information to indicate in which distance range around the GPS location the V2X information is broadcast, e.g., if a radius is included, the V2X message is broadcasted in a circle indicated by the radius around the GPS location.

At block 403, the BMSC transmits the traffic start message to a core network, wherein the traffic start message includes a traffic identifier TMGI, a broadcast range of the traffic, a traffic quality requirement. After receiving the request, the core network transmits a traffic start response message to the BMSC. The core network may include a gateway and a mobility management entity (MME). And the BMSC firstly transmits the message to the gateway, and then the gateway transmits the traffic start message to the MME.

At this block, the traffic start message includes information as follows:

a type of a V2X message;

a TGMI of a V2X bearer;

At block 404, the core network transmits the traffic start message to the MCE. If a MBMS bearer may be established with at least one base station, the MCE transmits the traffic start response to the MME.

At this block, the traffic start message includes information as follows:

a type of a V2X message;

a TGMI of a V2X bearer;

a V2X service area, i.e., a broadcast range of the eMBMS. The broadcast range may be set to one or more pieces of information:

After receiving the message, according to the type of the V2X message, the MCE knows that the V2X message is the location broadcast based type. The MCE determines the broadcast range, e.g., in which messages the V2X message is broadcasted. In order to make determination, the MCE needs to know the GPS location information of the base station, and the information may be obtained according to the process in a third embodiment, or may be pre-configured for the MCE via an operation maintenance point. The MCE receives that the location information in the traffic start message is set to the GPS information, and may determine to which base station the traffic start message is transmitted according to the GPS information of the base station and the range information. The MCE has obtained cell information reported by the base station, according to the location information included in the traffic start message and the information which has been obtained by the MCE, the MCE finally determines a cell list. The list indicates in which cells the V2X message is broadcasted.

At block 405, the MCE transmits the traffic start message to the base station.

The traffic start message transmitted by the MCE includes:

a traffic identifier, TMGI;

service area information, which may be set to a unique cell identifier list, the list indicates in which cells the V2X message is broadcasted.

a traffic quality parameter.

If the MCE determines to use the MBSFN mode, the service area is set to a MBSFN area identifier. If the MCE determines to use the single cell point-to-multipoint way, the service area is set to the cell identifier list.

At block 406, the base station transmits the traffic start message to the UE.

So far, the second embodiment ends.

Third Embodiment

At block 501, the base station transmits a M2 establishment request message to a MCE.

The message includes a base station identifier, information of a cell in the base station. The message further includes the location information of the base station, e.g., GPS location information, may further include radius information of the base station. According to the GPS location information and the radius information of the base station, the MCE may definitely determine the location and the size of the base station.

At block 502, the MCE transmits a M2 establishment response message to the base station.

The message at least includes a MCE identifier, may further include MBMS broadcast information configured for the base station.

So far, the third embodiment ends.

A V2X server is provided according to a fourth embodiment of the present disclosure. As show in FIG. 6, the V2X server includes:

a receiving module, to obtain location information of a UE and a type of a V2X message;

a service area determining module, to determine a service area for broadcasting a V2X message; and

a transmitting module, to establish an Enhanced Multimedia Broadcast/Multicast Service (eMBMS) bearer among a core network, a V2X server and a base station within the service area, and transmit the V2X message to the base station within the service area through the bearer.

A detail processing process for each module in the V2X server refers to other embodiments above.

A MCE is provided according to a fifth embodiment of the present disclosure. As show in FIG. 6, the MCE includes:

a receiving module, to obtain location information of a user equipment (UE) and a type of a V2X message;

a service area determining module, to determine a service area for broadcasting the V2X message;

A detail processing process for each module in the MCE refers to other embodiments above.

The foregoing is only preferred examples of the present invention and is not used to limit the protection scope of the present invention. Any modification, equivalent substitution and improvement without departing from the spirit and principle of the present invention are within the protection scope of the present invention.

Claims

A Vehicle to Everything (V2X) message transmitting method, comprising:

obtaining, by a Multimedia Broadcast/Multicast Service (MBMS) Coordination Entity (MCE), location information of a user equipment (UE) and a type of a V2X message, determining, by the MCE, a service area for broadcasting the V2X message;

transmitting, by the MCE, the service area to a base station within the service area, so that the base station transmits the V2X message.
The method of claim 1, wherein the MCE obtaining the location information of the UE comprises:

receiving, by the MCE, the location information of the UE which is from the UE and is forwarded by a V2X server and a BMSC.
The method of claim 1, wherein the location information of the UE comprises: geographical location information of the UE and/or information of a cell which the UE belongs to.
The method of claim 1, wherein the MCE determining the service area for broadcasting the V2X message comprises:

determining, by the MCE, the service area according to the location information of the base station.
The method of claim 4, wherein the location information of the base station is pre-configured through operation maintenance or is obtained through an X2 interface establishment process.
A Vehicle to Everything (V2X) message transmitting method, comprising:

receiving, by a V2X server, location information of a UE;

determining, by the V2X server, a service area for broadcasting a V2X message, and transmitting the service area to a base station within the service area, so that the base station transmits the V2X message.
The method of claim 6, wherein the location information of the UE comprises: geographical location information of the UE and/or information of a cell which the UE belongs to.
The method of claim 6, wherein the V2X server receives reported time information transmitted by the UE, and determines whether at least two V2X events is a same event or different events according to the time information.
The method of claim 6, wherein the transmitting the service area to the base station within the service area, comprises:

transmitting, by the V2X server, a traffic start message to the base station within the service area through a BMSC, a core network, and a MCE, wherein the traffic start message comprises the service area.
A V2X server, comprising:

a receiving module, to obtain location information of a UE and a type of a V2X message;

a service area determining module, to determine a service area for broadcasting a V2X message; and

a transmitting module, to establish an Enhanced Multimedia Broadcast/Multicast Service (eMBMS) bearer among a core network, a V2X server and a base station within the service area, and transmit the V2X message to the base station within the service area through the bearer.
A Multimedia Broadcast/Multicast Service (MBMS) Coordination Entity (MCE), comprises:

a receiving module, to obtain location information of a user equipment (UE) and a type of a V2X message;

a service area determining module, to determine a service area for broadcasting the V2X message;

a transmitting module, to establish an Enhanced MBMS (eMBMS) bearer with a base station, so that the base station transmits the V2X message.