CN107027104A - Transmit method, gateway, base station and the equipment and communication system of V2X message - Google Patents
Transmit method, gateway, base station and the equipment and communication system of V2X message Download PDFInfo
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- CN107027104A CN107027104A CN201610069753.7A CN201610069753A CN107027104A CN 107027104 A CN107027104 A CN 107027104A CN 201610069753 A CN201610069753 A CN 201610069753A CN 107027104 A CN107027104 A CN 107027104A
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- 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
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/16—Gateway arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/18—Service support devices; Network management devices
- H04W88/184—Messaging devices, e.g. message centre
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Abstract
Disclose a kind of method, gateway, base station and the equipment and communication system of transmission V2X message.Local gateway receives V2X message from base station in the method；Local gateway determines Internet Protocol (IP) address of the local V2X servers of base station；And V2X message is sent to local V2X servers by local gateway according to IP address.Pass through above-mentioned scheme, it is possible to reduce the delay of uplink, improve traffic efficiency.
Description
Technical field
Embodiments of the invention are related to wireless communication technology, more particularly to a kind of in different base stations
Between, transmit the method and corresponding communication system of the message relevant with public safety.
Background technology
Present mobile communication is increasingly intended to provide the user the multimedia industry of high rate data transmission
Business, as shown in figure 1, being the system architecture diagram of System Architecture Evolution (SAE).User equipment
(UE) 101 be the terminal device for receiving data.Evolved universal terrestrial radio access network
(E-UTRAN) 102 be Radio Access Network, and access wireless network is provided including for UE
The macro base station (eNodeB/NodeB) of network interface.Mobile management entity (MME) 103 is responsible for
Manage UE mobile context, session context and security information.Gateway (SGW)
The 104 main functions of providing user plane, MME 103 and SGW 104 are likely to be at same
Physical entity.Grouped data network gateway (PGW) 105 is responsible for the work(such as charging, Lawful Interception
Can, same physical entity can also be in SGW 104."Policy and Charging Rules Function is real
Body (PCRF) 106 provides service quality (QoS) strategy and charging criterion.General packet without
It in UMTS (UMTS) is several that line service supporting node (SGSN) 108, which is,
According to transmission provide route apparatus for network node.Home subscriber server (HSS) 109 is
UE local ownership subsystem, being responsible for protection includes the current location of user equipment, service section
The user profile such as address, user security information, the packet data content of user equipment of point.
With the fast development of vehicle, road safety issues become increasingly conspicuous.In face of the traffic taken place frequently
Accident, using lifting traffic infrastructure, strengthens the conventional methods such as traffic safety education and reduces road
The space of road traffic accident is more and more limited；Therefore, ICT is utilized, is passed through
Vehicle and vehicle, communication between vehicle and road side facility strengthen people to vehicle-periphery
Judgement, when detecting road hazard situation and occurring, provided to driver and other vehicles and
When early warning, to avoid Traffic Collision.This technology is referred to as V2X, i.e. car to arbitrarily setting
Standby communication, is the key technology of following intelligent transport system, can by V2X technologies
To effectively reduce the loss that traffic accident is caused.
V2X contains car to the communication (Vehicle-to-Vehicle, abbreviation V2V) of car, and car is arrived
The communication of the communication (Vehicle-to-Infrastructure, abbreviation V2I) of roadside equipment and car to people
(Vehicle-to-Pedestrian, abbreviation V2P).These three V2X communication mechanisms are by feeling mutually
Know the business that intelligence is provided for driver.These transmission facilities, such as vehicle, roadside equipment
Or pedestrian, the information sent using other vehicles or sensor, it can collect near oneself
The information of environment, and by sharing these information, to provide more intelligent business, for example, touch
Hit early warning or automatic Pilot.These IN services are segmented into three classes：
1st, with the related business of road safety, including：(1), vehicle is dangerous when finding
Close on, such as when there is barrier in front, other vehicles can be reminded in time；(2), vehicle energy
The direction that other vehicles oneself are advanced enough is informed, does more accurate with the driver for helping other vehicles
Judgement；(2) when, close to intersection, reminded to other vehicles；(4) expressway, is sailed out of
When, pointed out to other vehicles；(5), interim/early warning for stopping suddenly；(6), vehicle modified line
When prompting；(7), accident is reported；(8), driver is to roadside pedestrian/cyclist
Prompting.
2nd, the business related with traffic efficiency, including can help to dredge wagon flow, in real time
Ground is adopted an effective measure by congestion.Administrative department can be neatly real according to some specific conditions
Traffic rules are applied, for example：Adjustable speed limit, variable signal lamp cycle and lamp sudden strain of a muscle order,
Intersection automatic vehicle flow control, ambulance/fire fighting truck/police car clear the way.
3rd, the business of other application, such as intelligent transportation can provide automatic parking, navigation shape
State, landmark identification etc..For law enforcement agencies such as police, V2X helps to monitor, exceeding the speed limit carries
Wake up, forbidden zone is managed, is strangled and is stopped implementation of order etc..By way of e-payment, V2X makes
The collection of toll/parking fee is more efficient and convenient, mitigates the congestion of wagon flow to a certain extent,
Reduce the low speed rear-end collision often occurred near charge station.
For V2V business, E-UTRAN causes UE (in this text, to V2V business, car
Can be as user equipment (UE), similarly hereinafter) V2V phases can be interacted with other neighbouring UE
The information of pass, information related interaction V2V need to meet E-UTRAN authentication and
Proximity principle.Proximity principle is configured by operator, UE not E-UTRAN service areas when
Wait, the related information of V2V can also be interacted.Support the UE transmission application layers of V2V applications
Information, such as its position, the information such as attribute.The length of V2V application layer messages is variable
, to adapt to the different information contents, operator can configure V2V message with the cycle
Form is sent.V2V message is mainly broadcast message.V2V message can be directly transmitted
Sent to neighbouring UE, or by roadside equipment (Road Side Unit, abbreviation RSU)
To other UE.
V2I business be support V2I application UE (in this text, to V2I business, vehicle can
With as UE, similarly hereinafter) send application layer message to RSU, RSU send application layer message to
The UE of one group or one support V2I application.
For V2P business, E-UTRAN causes UE (in this text, to V2P business, car
Can be as UE, similarly hereinafter) information that can be related with other neighbouring UE interactions V2P.
Information related interaction V2P needs to meet E-UTRAN authentication and proximity principle.
Proximity principle is configured by operator, and UE, can also not when E-UTRAN service areas
Information related interaction V2P.V2P message can be transmitted directly to neighbouring UE, or
Other UE are sent to by roadside equipment RSU.
V2X communication by application layer protocol PC5 or can pass through Uu interfaces.V2X
There are a variety of use-cases (use case), the requirement of every kind of use-case is different, some use-case requirement V2X
Application layer can timely receive the V2X message of UE transmissions, and V2X applications produce one
New descending V2X message, the downstream message will allow a range of all users all
Receive, the descending V2X message having only requires that the user under a base station will receive.Such as
What transmits V2X message to application layer by base station, and causes the deferred gratification V2X of transmission
The requirement of use-case.In addition, how the V2X message that also V2X application layers are produced is sent to
UE, especially in the UE under other base stations, in current technology scheme, does not have also
The scheme of solution.
The content of the invention
For one or more problems of the prior art, it is proposed that one kind transmission V2X message
Method, gateway, base station and equipment and communication system.
In one aspect of the invention the communication that vehicle takes office meaning equipment is transmitted there is provided a kind of
(V2X) method of message, including step：Local gateway receives V2X message from base station；Institute
State Internet Protocol (IP) address that local gateway determines the local V2X servers of the base station；
And the local gateway V2X message is sent to according to the IP address it is described local
V2X servers.
In another aspect of this invention the communication that vehicle takes office meaning equipment is transmitted there is provided a kind of
(V2X) method of message, including step：Base station receives disappearing from user equipment (UE)
Breath；The base station determines that the message is V2X message, then is transmitted to the V2X message
Local V2X gateways for transmitting V2X message, so that the local V2X gateways will be described
Message is sent to local V2X servers.
In still another aspect of the invention the communication that vehicle takes office meaning equipment is transmitted there is provided a kind of
(V2X) method of message, including step：The spot broadcasting multicast module of first base station is received
The V2X message produced by the V2X servers of first base station；And the spot broadcasting multicast
The V2X message is sent to the first base station by module, to be further transmitted to user equipment
(UE)。
In another aspect of the invention there is provided a kind of gateway, it is communicatively coupled with base station,
The gateway includes：Receiving unit, V2X message is received from base station；Processing unit, determines institute
State Internet Protocol (IP) address of the local V2X servers of base station；And transmitting element,
The V2X message is sent to the local V2X servers according to the IP address.
In another aspect of the invention there is provided a kind of base station, including：Transceiver, is received
Message from user equipment (UE)；Whether processing unit, it is V2X to determine the message
Message；Transmitting element, will in the case where processing unit determines that the message is V2X message
The V2X message is transmitted to the local V2X gateways for transmitting V2X message, so as to described
Local V2X gateways send the message to local V2X servers.
In another aspect of the invention there is provided a kind of broadcast group broadcast equipment, with base station and its
V2X servers are communicatively coupled, and the broadcast group broadcast equipment includes：Receiving unit, is received
The V2X message produced by the V2X servers of base station；And transmitting element, by the V2X
Message is sent to the base station, to be further transmitted to user equipment (UE).
In another aspect of the invention there is provided a kind of communication system, including：Base station, from
Family equipment (UE) receives communication (V2X) message and uplink of the vehicle to arbitrary equipment；
And local gateway, determine the Internet Protocol (IP) of the local V2X servers of the base station
Address, and the V2X message is sent to the local V2X clothes according to the IP address
Business device.
In another aspect of the invention there is provided a kind of communication system, including：Vehicle is to arbitrarily
Communication (V2X) server of equipment, produces V2X message；Spot broadcasting multicast module, connects
The V2X message is received, and the V2X message is sent according to the broadcast mode possessed；
And base station, V2X message is sent to user equipment (UE).
By some above-mentioned schemes, V2X message can be transmitted to application layer, and caused
The requirement of the deferred gratification V2X use-cases of transmission.In addition, can be V2X using other schemes
The data of business are sent to the UE of correlation, so as to reduce the generation of traffic accident, improve traffic
Efficiency.
Brief description of the drawings
In order to be better understood from the present invention, embodiments of the invention will be carried out according to the following drawings
Description：
Fig. 1 shows the SAE system architecture diagrams according to prior art；
Fig. 2 is the schematic architectural diagram of communication system according to embodiments of the present invention；
Fig. 3 is the schematic diagram of the method for the transmission V2X message of embodiments in accordance with the present invention one；
Fig. 4 is the schematic diagram of the method for the transmission V2X message of embodiments in accordance with the present invention two；
Fig. 5 is the schematic diagram of the method for the transmission V2X message of embodiments in accordance with the present invention three；
Fig. 6 is the schematic diagram of the method for the transmission V2X message of embodiments in accordance with the present invention four；
Fig. 7 is the schematic diagram of the method for the transmission V2X message of embodiments in accordance with the present invention five；
Fig. 8 is the method schematic diagram of the transmission V2X message of embodiments in accordance with the present invention six；
Fig. 9 is the method schematic diagram of the transmission V2X message of embodiments in accordance with the present invention seven；
Figure 10 is the structural representation of local gateway according to embodiments of the present invention；
Figure 11 is the structural representation of base station according to embodiments of the present invention；
Figure 12 is the structural representation of spot broadcasting multicast module according to embodiments of the present invention.
Accompanying drawing is not shown to all circuits or structure of embodiment.Through all accompanying drawing phases
Same reference represents same or analogous part or feature.
Embodiment
The specific embodiment of the present invention is described more fully below, it should be noted that reality described herein
Example is applied to be served only for for example, being not intended to limit the invention.In the following description, in order to carry
For thorough understanding of the present invention, a large amount of specific details are elaborated.However, general for this area
Logical technical staff it is evident that：The present invention need not be carried out using these specific details.
In other examples, in order to avoid obscuring the present invention, do not specifically describe known circuit, material or
Method.
Throughout the specification, to " one embodiment ", " embodiment ", " example " or " show
Referring to for example " means：Special characteristic, structure or the spy described with reference to the embodiment or example
Property be comprised at least one of the invention embodiment.Therefore, on each ground of entire disclosure
The phrase " in one embodiment " of side's appearance, " in embodiment ", " example " or " example "
It is not necessarily all referring to same embodiment or example.Furthermore, it is possible to any appropriate combination and/or
Sub-portfolio is by specific feature, structure or property combination in one or more embodiments or example.
In addition, it should be understood by one skilled in the art that accompanying drawing is provided to explanation provided herein
Purpose, and accompanying drawing is not necessarily drawn to scale.Term "and/or" used herein
Any and all combination for the project listed including one or more correlations.
In the V2X use-cases defined at present, the delay of some use-cases requirement is very small, uses
Current framework is come to transmit data be that can not meet the requirement of delay.The delay of data is mainly wrapped
Contained the time for setting up user plane, and user data transmission delay.So delay is reduced,
On the one hand the time of user plane foundation is reduced, the node of user's transmission is on the one hand reduced.
V2X communications typically all contain uplink and downlink transfer.Uplink refers to that UE is sent
V2X message gives V2X application layers, and downlink transfer refers to that V2X application layers send V2X message
To UE.Therefore the delay of data is reduced, can be by reducing transmitting uplink data and/or subtracting
Lack downlink data transmission to achieve the goal.
Fig. 2 shows the schematic architecture of communication system according to embodiments of the present invention.In Fig. 2
In, uplink and downlink mechanism is optimized, according to the quality requirement of use-case, can only be adopted
All used with up optimization, or only with descending optimization, or both.It is up to use
The mechanism of local routing, by taking communication system 200 as an example, base station 1 receives V2X message,
It is transmitted directly to local gateway (LGW：Local Gate Way) 203, local gateway 203
V2X message is sent to the local V2X servers (application module) 202 on base station 1.This
Ground V2X servers 202 can handle most V2X message, disappear for some V2X
Breath, local V2X servers need to be forwarded to concentration V2X servers (application module) 201.
V2X servers 201 are concentrated to connect multiple local V2X servers 202 and 212.It is descending to adopt
The V2X message produced with the mechanism of local multicast, local V2X servers 202, sends
Message can directly pass through to spot broadcasting multicast module 204, spot broadcasting multicast module 204
Internal interface is sent to base station 1, and then base station 1 is sent to UE.If V2X message needs
Broadcasted under multiple base stations, such as the V2X message that the local V2X servers on base station 1 are produced
Be also required to broadcast on base station 2, then can be by interface 1, either interface 2 or interface
3 are transferred to base station 2.For communication system 210, base station 2 corresponds to above-mentioned base station 1, this
Ground V2X servers 212 correspond to above-mentioned local V2X servers 202, local gateway 213
Corresponding to above-mentioned local gateway 203, spot broadcasting multicast module 214 corresponds to above-mentioned local
Broadcast group broadcast module 204, therefore be no longer described in detail here for communication system 2.
Interface 1 is the local V2X servers 202 on the interface between application layer, base station 1
The V2X message of generation, the local V2X servers determine the message scope to be sent, if
Need to be sent to another base station, such as Fig. 2 base station 2, local V2X servers 202
Message is sent to by interface 1 the local V2X servers 212 on corresponding other base stations.
Or the local V2X servers 202 on base station 1 send messages to concentration V2X servers
201, by concentrating V2X servers hair 201 to send message to be taken to corresponding other local V2X
Business device 212.
Interface 2 is the interface between the spot broadcasting module 204 of base station 1 and base station 2, and this connects
Mouth can utilize the M2 interfaces defined at present, or an interface newly defined.
Interface 3 is the interface between base station 1 and base station 2, can be X2 interface or S1
Interface.
Fig. 3 is one embodiment of the invention.Fig. 3 describes that up to set up V2X local
The signaling process of route.According to current framework, gateway is carrier network and external server
Interface, if not supporting local routing, the data of user plane are sent to base station by UE,
Base station forwards data to gateway (abbreviation SGW), and gateway forwards data to packet count
According to network (abbreviation PDN) gateway.In order to reduce the delay of data transmission, PDN Gateway
Function can be closed with base station and set, and base station closes the gateway set and is referred to as local gateway (LGW).
If possessing the function of local gateway on base station, then business of networking can be by base station
LGW is transmitted directly to Internet Server.The data of user plane can so be reduced in fortune
The delay of transmission in battalion in network.It is local that the carrying of all support local routings is built upon this
On gateway, by destination address of the local gateway according to user plane, different outside clothes are sent to
Business device.Because V2X business has concentration V2X servers and local V2X servers, some
Business is local V2X server process, and some business are to concentrate V2X server process,
When local gateway receives the data of the user plane of V2X business, it would be desirable to be able to be forwarded to correct
V2X servers.The information to domain name parsing that embodiment one sends base station by local gateway takes
Business device (abbreviation DNS), so as to obtain the IP address of correct server.Local gateway is preserved
IP address, the forwarding of the data for after.
Step 301：UE sends messages to mobile management entity (MME：Mobility
Management Entity)。
UE sends NAS (Non-Access Stratum) message, and such as business request information is given
MME, the message is first sent to base station by RRC information, and base station sends initial UE message
To MME.Initial UE message includes NAS message, and UE positional information, UE's is interim
The information such as mark.Message also carries the IP address of local gateway.
Step 302：MME sends initial context and sets up request message to base station.
Message carries gateway SGW address, the tunnel information of SGW distribution, EPS
The information of carrying, the information of encryption, MME signaling connection ID, switching limits the information such as list.
If local routing is supported in PDN connections, this message further comprises local association identification
(SIPTO Correlation ID), to set up the user plane between base station and local LGW.
Local association identification is equal to the tunnel number of user plane PDN Gateway.Base station preserves above- mentioned information.
Step 303：Radio bearer is set up in base station.The encryption of user plane is set up in this step.
Step 304：Upstream data is sent to base station by UE, and base station sends upstream data to this
Ground gateway.Local gateway receives data, can parse packet, obtains its unified money included
Source finger URL (URL) information, URL is the position and access side to the resource on internet
A kind of succinct expression of method, is the address of standard resource on internet, and the information that it is included refers to
How the position and browser for going out file should handle it.Local gateway is sent to URL
DNS, dns resolution URL, obtain the IP address of server, and the IP of server
Address is sent to LGW, and LGW can be sent to IP bags corresponding according to the IP address
On server.Because V2X business employs local V2X servers and concentrates V2X services
Device, for same business, or all V2X business, URL is probably the same.
Only according to URL, DNS, which does not know, select local V2X servers still to concentrate V2X
Server, or DNS do not know which local V2X server selected.Therefore, originally
Ground gateway is sent to DNS information, except comprising URL, should also include the information of base station,
The information of base station has two ways：
1st, the mark comprising base station, receives the mark, and DNS notifies the local V2X of the base station
The IP address of server is to local gateway, and otherwise, DNS notifies to concentrate V2X servers
IP address is to local gateway.For example, LGW provides { URL, eNB identify (i.e. eNB ID) },
The information is received, DNS returns to the IP address of local V2X servers.
2nd, the instruction comprising base station, receives the instruction, and DNS notifies the local V2X of the base station
The IP address of server is to local gateway, and otherwise, DNS notifies to concentrate V2X servers
IP address is to local gateway.For example：LGW provides { URL uses the instruction of home server },
DNS returns to the IP address of local V2X servers.
Step 305：Base station sends initial context and sets up response message to MME.Message package
Address containing base station, the user plane tunnel built up on the mark of successful EPS carryings, base station
Road information etc..
Step 306：MME sends modification bearing request message to SGW.SGW sends and repaiied
Change bearing request message to local gateway.Address of the message package containing base station, the tunnel of base station distribution
Road information.SGW sends modification bearer messages to local routing.So local routing is also obtained
The tunnel information of base station distribution, can pass through internal directly user plane and send downlink data
To base station.The process is optional.
Step 307：Local gateway sends modification bearing response message to SGW.SGW is sent
Bearing response message is changed to MME.The process is optional.
Although the embodiment one of the above is directed to base station and LAN closes situation about setting,
This method is also applied for independent local gateway (standalone LGW) framework, embodiment two
Describe under independent local gateway framework, how to set up local routing carrying.
Fig. 4 describes the up signaling process for setting up V2X local routings.According to current frame
Structure, gateway is the interface of carrier network and external server, if not supporting local routing,
The data of user plane are sent to base station by UE, and base station forwards data to gateway, service
Gateway forwards data are to PDN Gateway.In order to reduce the delay of data transmission, according to user's
Position, can find a gateway near from base station, be independent local gateway, independent LAN
Shut the function of gateway and PDN Gateway.It is connected to the base station composition one under the gateway
Individual local home network, there is common local home network mark LHN ID.Work as local gateway
Receive the data of the user plane of V2X business, it would be desirable to be able to be forwarded to correct V2X servers.
Embodiment two sends the information of base station to DNS by local gateway, so as to obtain correct
The IP address of V2X servers.Local gateway preserves URL and the corresponding relation of IP address,
The forwarding of data for after.
Step 401：UE sends messages to MME.
UE sends NAS message, and such as business request information passes through RRC to MME, the message
Message is first sent to base station, and base station sends initial UE message to MME.Initial UE message
Comprising NAS message, UE positional information, the information such as UE temporary mark.Message is also taken
With local home network mark LHN ID.
Step 402：MME sends initial context and sets up request message to base station.
The address of the independent local gateway of message carrying, the tunnel information of independent local gateway distribution,
The information of EPS carryings, the information of encryption, MME signaling connection ID, switching limitation list etc.
Information.Base station preserves above- mentioned information.
Step 403：Radio bearer is set up in base station.The encryption of user plane is set up in this step.
Step 404：Upstream data is sent to base station by UE, and base station sends upstream data to this
Ground gateway.Local gateway receives data, can parse packet, obtains the data portion of packet
URL (URL) information that subpackage contains, URL is to the resource on internet
Position and access method a kind of succinct expression, be the address of standard resource on internet,
The information that it is included points out how the position of file and browser should handle it.Local gateway
URL is sent to DNS, dns resolution URL, the IP address of server, and handle is obtained
The IP address of server is sent to LGW, and LGW can be according to the IP address, IP bags
It is sent on corresponding server.It is right because V2X business employs local V2X servers
In same business, or all V2X business, URL is probably the same.Basis
URL, DNS, which do not know, select local V2X servers still to concentrate V2X servers,
Or DNS does not know which local V2X server selected.Therefore, local gateway is sent out
DNS information is given, except comprising URL, should also include the information of base station, receive this
Mark, DNS notifies the IP address of the local V2X servers on the base station to local gateway,
Otherwise, DNS notifies the IP address for concentrating V2X servers to local gateway.For example, LGW
{ URL, eNB identify (i.e. eNB ID) } is provided, the information is received, DNS returns to local V2X
The IP address of server.
Step 405：Base station sends initial context and sets up response message to MME.Message package
Address containing base station, the user plane tunnel built up on the mark of successful EPS carryings, base station
Road information etc..
Step 406：MME sends modification bearing request message to SGW.SGW sends and repaiied
Change bearing request message to local gateway.Address of the message package containing base station, the tunnel of base station distribution
Information.SGW sends modification bearer messages to local routing.So local routing is also obtained
The tunnel information of base station distribution, can be sent by internal directly user plane downlink data to
Base station.The step is optional.
Step 407：Local gateway sends modification carrying corresponding message to SGW.SGW is sent
Bearing response message is changed to MME.The step is optional.
The following examples three are described in detail what is referred in the above embodiments one and embodiment two
Local gateway passes through the process to dns server IP address requesting.As described above, the LGW
It can close and set with base station, or individually node.
Step 501：LGW sends DNS query order to DNS.Receive the number of UE transmissions
According to bag, the information that LGW analyze data bags are included.In general, packet contains URL
Information, or contain the title of the information of V2X message, such as V2X message.LGW
URL information, or the information of V2X message, it is sent to DNS.Purpose is to look into
The IP address of V2X servers is ask, in addition, the message that LGW is sent further comprises
The mark of base station, or base station configured information, the configured information of base station indicates LGW and needs
Obtain the IP address of the local V2X servers on base station.If not comprising the information, or
Person does not include the mark of base station, and mark LGW needs with obtaining the IP of concentration V2X servers
Location.
Step 502：DNS returns to query response message.Message is with containing the IP of server
Location.
Step 503：LGW preserves the IP address of server, the number received later from carrying
According to bag, LGW finds the IP address of server by inquiring about the information preserved, and packet is sent out
Give corresponding server.
Fig. 6 describes the 4th embodiment of the present invention.According to current framework, gateway is fortune
Seek the interface of business's network and external server, if not supporting local routing, the number of user plane
Base station is sent to according to by UE, base station forwards data to gateway, gateway forwarding data
To PDN Gateway.In order to reduce the delay of data transmission, the function of PDN Gateway can and base
Conjunction of standing is set, and base station closes the gateway set and is referred to as local gateway.In this embodiment, it is V2X
A local gateway is individually set up, and other Internet services use different local gateways,
When then setting up business, MME is if it find that be V2X business, with regard to being the traffic assignments
V2X local gateway.The local gateway and local V2X servers have internal interface.Send
To the data of local gateway, local gateway is directly forwarded to local V2X servers.Or altogether
With local gateway, MME tells that some carrying of base station is set up for V2X business.Held at this
The data received in load, local gateway is directly forwarded to local V2X servers.If desired,
Local V2X servers give concentration V2X servers the data forwarding of V2X business again.
Step 601：UE sends messages to MME.
UE sends NAS message, and such as business request information passes through RRC to MME, the message
Message is first sent to base station, and base station sends initial UE message to MME.Initial UE message
Comprising NAS message, UE positional information, the information such as UE temporary mark.Message is also taken
With the IP address of local gateway.MME needs to know which business is carrying V2X business
, it can be indicated by defining special APN (abbreviation APN), according to UE
Context in the APN that preserves, MME knows that UE has applied for V2X business.Or it is logical
The configured information crossed in signing information, saves the configured information, MME in UE contexts
Know that UE has applied for V2X business.Receive after service request, MME will be again
The APN preserved in UE contexts sets up default bearer and/or dedicated bearer.
Step 602：MME sends initial context and sets up request message to base station.
Message carries gateway SGW address, the tunnel information of SGW distribution, EPS
The information of carrying, the information of encryption, MME signaling connection ID, switching limits the information such as list.
If carrying will transmit support V2X, this message also local LGW's comprising V2X
IP address and the local association identifications of V2X (V2X Correlation ID), come set up base station and
User plane between the local LGW of V2X.Local association identification is equal to user plane PDN
The tunnel number of gateway.Or if V2X local LGW and other Internet services
If local LGW is One function entity, message contains the mark of carrying, local LGW
IP address, the configured information of local association identification, also V2X business receives the instruction
Information, base station know the carrying it is corresponding be V2X business, the data received from the carrying,
Base station is directly forwarded to V2X local gateways.Base station preserves above- mentioned information.
Step 603：Radio bearer is set up in base station.The encryption of user plane is set up in this step.
Step 604：Upstream data is sent to base station by UE, and base station sends upstream data to V2X
Home serving gateway.V2X local gateways receive data, directly transmit data local to V2X
Server.
Step 605：Base station sends initial context and sets up response message to MME.Message package
Address containing base station, the user plane tunnel built up on the mark of successful EPS carryings, base station
Road information etc..
Step 606：MME sends modification bearing request message to SGW.SGW sends and repaiied
Change bearing request message to local gateway.Address of the message package containing base station, the tunnel of base station distribution
Information.SGW sends modification bearer messages to local routing.So local routing is also obtained
The tunnel information of base station distribution, can be sent by internal directly user plane downlink data to
Base station.The message is optional.
Step 607：Local gateway sends modification bearing response message to SGW.SGW is sent
Bearing response message is changed to MME.The message is optional.
Fig. 7 describes the transmission flow of the descending data of V2X.According to current framework,
Control plane, server sends message and is sent to BMSC, and then BMSC sends business and opened
Beginning message gives eMBMS gateways, and MCE is transmitted to by MME, and then MCE sends industry
Business starts message to base station, and base station is UE distributing radio resources.In user plane, server
Data by BMSC processing after, be sent to eMBMS gateways, gateway is sent to base
Stand, then base station is sent to UE.Postpone to reduce data and send, the local V2X on base station
The V2X message that server is produced directly can be sent to UE by base station.Specifically, in base
There is the function of processing broadcasting multicast service, local V2X servers can pass through base station on standing
Internal broadcast group broadcast module, sends V2X data to UE, it is not necessary to by core net
Broadcast group broadcast entity is handled.
Step 701：Under the V2X message that V2X servers on base station are received, and generation
Capable V2X message.Descending V2X message is used for the traffic of road to notify to other
User, therefore, descending V2X message is typically by the way of broadcast.
Step 702：V2X servers have been sent to descending V2X message the sheet on base station
Ground broadcast group broadcast module.
Common, the mode of broadcast can be MBSFN modes, or single Cell Broadcast CB mode,
Either by way of broadcast channel broadcasts, or other broadcast or unicast mode.
According to the difference of the broadcast mode of definition, the implementation of local broadcast group broadcast module is also different.
Can be following one or several kinds.
1st, spot broadcasting multicast module completes support MBSFN or single Cell-Broadcast mode
Function, i.e. BMSC, MBMS-GW and MCE with eMBMS function.Tool
For body, spot broadcasting multicast module have received the V2X message of V2X servers transmission, this
Ground broadcast group broadcast module finds corresponding eMBMS service identification, and what generation business started disappears
Breath, mark of the message package containing eMBMS, operation quality requirement, the scope of broadcast, the business
The message of beginning is sent to base station by internal interface, if it is determined that transmitting mould using MBSFN
Formula, spot broadcasting multicast module also needs to determine the configuration of Radio Resource so that all MBSFN
Base station in broadcasting area all uses same radio-resource-configuration.It can thus be seen that local
Broadcast group broadcast module, which needs to have, produces eMBMS service identifications, determines eMBMS quality
It is required that, determine the function of broadcasting area.Spot broadcasting multicast module can be according to being pre-configured with
Principle obtains above- mentioned information to determine these information, or from Operation and Maintenance node.Spot broadcasting
The interface of multicast module and base station is internal interface, and specific transformat is true when realization
Fixed, different producers can have different implementations, it is only necessary to realize that function above is
Can.
2nd, spot broadcasting multicast module has the function of producing cell broadcast information.Some V2X
Message is more suitable by the way of system broadcasts.Spot broadcasting multicast module in base station receives V2X
Message, generation system broadcast, then sends V2X message in the resource of Cell Broadcast CB.
Step 703：According to the difference of above-mentioned broadcast mode, spot broadcasting multicast module is V2X
Message is sent to base station.
Spot broadcasting multicast module is closed with base station and set, and V2X message is sent by internal interface
Sending module to base station.
Step 704：Base station configurating downlink Radio Resource, then sends V2X message to base station
In the range of user.
In step 704, according to the method difference for sending V2X message, different processes is included.
If by MBSFN modes or single Cell Broadcast CB mode, step 704 contains base station handle
MBSFN wireless resource configuration is sent to UE, and data are then sent on the resource.
If by way of broadcast channel broadcasts V2X message, it is direct that step 704 contains base station
V2X message is sent to UE by a broadcast message newly defined.If passing through others
Broadcast or mode of unicast, then step 704 contains the wireless money used broadcast or unicast
The configuration in source, then sends V2X message on the resource.
Embodiment five describes V2X servers and sends V2X message to co-located base station, for
Some V2X message, will not only send on co-located base station, in addition it is also necessary in other base stations
Upper to send, the message that Fig. 8 describes V2X is sent to by the interface between base station and base station
The flow of other base stations.
Step 801：The V2X message that V2X server process on base station 1 is received, and
Produce descending V2X message.Descending V2X message is used for the traffic of road to notify
To other users, therefore, descending V2X message is typically by the way of broadcast.
Step 802：V2X servers have been sent to descending V2X message on base station 1
Spot broadcasting multicast module.
Common, the mode of broadcast can be multicast/multicast single-frequency network network MBSFN modes,
Or single Cell Broadcast CB mode, or by way of broadcast channel broadcasts, or it is other
Broadcast or unicast mode.According to the difference of the broadcast mode of definition, local broadcast group
The implementation of broadcasting module is also different.Can be following one or several kinds.
1st, spot broadcasting multicast module completes support MBSFN or single Cell-Broadcast mode
Function, i.e. BMSC, MBMS-GW and MCE with eMBMS function.Tool
For body, spot broadcasting multicast module have received the V2X message of V2X servers transmission, this
Ground broadcast group broadcast module finds corresponding eMBMS service identification, and what generation business started disappears
Breath, mark of the message package containing eMBMS, operation quality requirement, the scope of broadcast, the business
The message of beginning is sent to base station by internal interface, if it is determined that transmitting mould using MBSFN
Formula, spot broadcasting multicast module also needs to determine the configuration of Radio Resource so that all MBSFN
Base station in broadcasting area all uses same radio-resource-configuration.It can thus be seen that local
Broadcast group broadcast module, which needs to have, produces eMBMS service identifications, determines eMBMS quality
It is required that, determine the function of broadcasting area.Spot broadcasting multicast module can be according to being pre-configured with
Principle obtains above- mentioned information to determine these information, or from Operation and Maintenance node.Spot broadcasting
The interface of multicast module and base station is internal interface, and specific transformat is true when realization
Fixed, different producers can have different implementations, it is only necessary to realize that function above is
Can.
2nd, spot broadcasting multicast module has the function of producing cell broadcast information.Some V2X
Message is more suitable by the way of system broadcasts.Spot broadcasting multicast module in base station receives V2X
Message, generation system broadcast, then sends V2X message in the resource of Cell Broadcast CB.
Step 803：The configurating downlink Radio Resource of base station 1, then sends V2X message to base
User in the range of standing.
In step 803, according to the method difference for sending V2X message, different processes is included.
If by MBSFN modes or single Cell Broadcast CB mode, step 803 contains base station handle
MBSFN wireless resource configuration is sent to UE, and data are then sent on the resource.
If by way of broadcast channel broadcasts V2X message, it is direct that step 803 contains base station
V2X message is sent to UE by a broadcast message newly defined.If passing through others
Broadcast or mode of unicast, then step 803 contains the wireless money used broadcast or unicast
The configuration in source, then sends V2X message on the resource.
Step 804：The V2X message of the converting downlink of base station 1 gives neighbouring base station 2.
If the X2 interface set up between base station 1 and base station 2, base station 1 sends V2X and disappeared
Cease to base station 2.Message can be sent by X2 control plane, or pass through user plane
Send.Here is the example sent by control plane, X2 interface define one it is new
Message, message carries following information.
If base station 1 and base station 2 are forwarded without X2 interface by S1 interfaces.Base station 1
ENB configurations transmission message is sent to core net, message carries the information and V2X of purpose base station
Message, core net sends MME configurations transmission message to base station 2, and message carries V2X message.
The MME1 that transmission between core net can be connected comprising two MME nodes, base station 1
By the destination address inside message, the MME2 of the connection of base station 2 is found, then MME1
Message is sent to by MME2 by base station 2.The content that message is carried disappears with above-mentioned X2 interface
Cease the content carried the same.
Step 805：The configurating downlink Radio Resource of base station 2, then sends V2X message to base
User in the range of standing.
Likewise, in step 805, according to the method difference for sending V2X message, comprising not
Same process.The specific method that may be referred to step 803.
Embodiment five describes V2X servers and sends V2X message to co-located base station, for
Some V2X message, will not only send on co-located base station, in addition it is also necessary in other base stations
Upper to send, the message that Fig. 9 describes V2X passes through between broadcast group broadcast module and other base stations
Interface send flow.
Step 901：The V2X message that V2X server process on base station 1 is received, and
Produce descending V2X message.Descending V2X message is used for the traffic of road to notify
To other users, therefore, descending V2X message is typically by the way of broadcast.
Step 902：V2X servers have been sent to descending V2X message on base station 1
Spot broadcasting multicast module.
Common, the mode of broadcast can be MBSFN modes, or single Cell Broadcast CB mode,
Either by way of broadcast channel broadcasts, or other broadcast or unicast mode.
According to the difference of the broadcast mode of definition, the implementation of local broadcast group broadcast module is also different.
Can be following one or several kinds.
1st, spot broadcasting multicast module completes support MBSFN or single Cell-Broadcast mode
Function, i.e. BMSC, MBMS-GW and MCE with eMBMS function.Tool
For body, spot broadcasting multicast module have received the V2X message of V2X servers transmission, this
Ground broadcast group broadcast module finds corresponding eMBMS service identification, and what generation business started disappears
Breath, mark of the message package containing eMBMS, operation quality requirement, the scope of broadcast, the business
The message of beginning is sent to base station by internal interface, if it is determined that transmitting mould using MBSFN
Formula, spot broadcasting multicast module also needs to determine the configuration of Radio Resource so that all MBSFN
Base station in broadcasting area all uses same radio-resource-configuration.It can thus be seen that local
Broadcast group broadcast module, which needs to have, produces eMBMS service identifications, determines eMBMS quality
It is required that, determine the function of broadcasting area.Spot broadcasting multicast module can be according to being pre-configured with
Principle obtains above- mentioned information to determine these information, or from Operation and Maintenance node.Spot broadcasting
The interface of multicast module and base station is internal interface, and specific transformat is true when realization
Fixed, different producers can have different implementations, it is only necessary to realize that function above is
Can.
2nd, spot broadcasting multicast module has the function of producing cell broadcast information.Some V2X
Message is more suitable by the way of system broadcasts.Spot broadcasting multicast module in base station receives V2X
Message, generation system broadcast, then sends V2X message in the resource of Cell Broadcast CB.
Step 903：The configurating downlink Radio Resource of base station 1, then sends V2X message to base
User in the range of standing.
In step 903, according to the method difference for sending V2X message, different processes is included.
If by MBSFN modes or single Cell Broadcast CB mode, step 903 contains base station handle
MBSFN wireless resource configuration is sent to UE, and data are then sent on the resource.
If by way of broadcast channel broadcasts V2X message, it is direct that step 903 contains base station
V2X message is sent to UE by a broadcast message newly defined.If passing through others
Broadcast or mode of unicast, then step 903 contains the wireless money used broadcast or unicast
The configuration in source, then sends V2X message on the resource.
Step 904：The transmission business of base station 1 starts message and is sent to base station.
There is connection the spot broadcasting multicast module of base station 1 and base station 2 in advance.For example base station 2 has been
M2 interfaces are established through the spot broadcasting multicast module with base station 1.The spot broadcasting of base station 1
Multicast module is equivalent to the MCE of base station 2, and the MCE establishes M2 with base station 2 and connect
Mouthful.MCE receive business start request, it is known that the business be in order to transmit V2X message,
MCE sends business and started to base station 2.
Step 905：The transmission business of base station 2 begins to respond to message to MCE.
Step 906：Base station 2 sends V2X message to UE.
Likewise, in step 906, according to the method difference for sending V2X message, comprising not
Same process.The specific method that may be referred to step 903.
It will be understood to those skilled in the art that the above embodiments can have a variety of modifications.
For example, having between the local V2X servers of base station 1 and the local V2X servers of base station 2
Standby interface, base station 2 is sent to by the interface by V2X message from the V2X servers of base station 1
V2X servers, so as to base station 2 V2X servers by V2X message via base station 2
Local multicast broadcast module and base station 2 are sent to the user equipment (UE) that base station 2 is serviced.This
In be not described in detail.
According to some embodiments of the present invention, as shown in Figure 10, the local gateway shown in Fig. 2
203 are communicatively coupled with base station 1, and can include receiving unit 1003, processing unit
1002 and transmitting element 1001.Receiving unit 1003 receives V2X message from base station.Processing
Unit 1002 determines Internet Protocol (IP) address of the local V2X servers of base station.Hair
Send unit 1001 that V2X message is sent into local V2X servers according to IP address.
According to other embodiment, as shown in figure 11, the base station 1 shown in Fig. 2 can include receiving
Sender 1103, processing unit 1102 and transmitting element 1101.Transceiver 1103 is received
Message from user equipment (UE).Processing unit 1102 determines whether the message is V2X
Message.Transmitting element 1101 processing unit determine the message be V2X message in the case of,
The V2X message is transmitted to the local V2X gateways for transmitting V2X message, so as to local
V2X gateways transmit the message to local V2X servers.
According to some embodiments, as shown in figure 12, the broadcast group broadcast module 204 shown in Fig. 2
It is communicatively coupled with base station 1 and its V2X servers 203, the broadcast group broadcast module can be with
Including receiving unit 1201 and transmitting element 1203.Receiving unit 1201 is received by base station
The V2X message that V2X servers are produced.V2X message is sent to base station by transmitting element 1203,
To be further transmitted to user equipment (UE).
It will be understood to those skilled in the art that some V2X business can use current framework
To transmit, some V2X business need to transmit using enhanced framework, if in system both
There is enhanced framework, have current framework again, it is necessary to which V2X servers determine which kind of is used
Framework, V2X servers can determine the transmission means used according to the type of V2X message
The framework used with carrying.
Detailed description above has been illustrated by using schematic diagram, flow chart and/or example
Method, gateway, base station and the equipment of transmission V2X message and the numerous embodiments of communication system.
In the feelings of this schematic diagram, flow chart and/or example comprising one or more functions and/or operation
Under condition, it will be understood by those skilled in the art that each in this schematic diagram, flow chart or example
Function and/or operation can by various structures, hardware, software, firmware or substantially they
Any combination come individually and/or common realize.In one embodiment, implementation of the invention
If the stem portion of the example theme can pass through application specific integrated circuit (ASIC), field-programmable
Gate array (FPGA), digital signal processor (DSP) or other integrated forms are realized.
However, those skilled in the art will appreciate that some aspects of embodiments disclosed herein exist
It wholly or partially can equally realize in integrated circuits, be embodied as at one or more
The one or more computer programs run on computer are (for example, be embodied as at one or more
The one or more programs run in computer system), it is embodied as in one or more processors
One or more programs of upper operation are (for example, be embodied as transporting in one or more microprocessors
Capable one or more programs), it is embodied as firmware, or be substantially embodied as aforesaid way
Any combination, and those skilled in the art are according to the disclosure, will be provided with design circuit and/or
Write the ability of software and/or firmware code.In addition, it would be recognized by those skilled in the art that
The mechanism of theme described in the disclosure can be distributed as the program product of diversified forms, and
Regardless of actual for the particular type for the signal bearing medium for performing distribution, described in the disclosure
The exemplary embodiment of theme is applicable.The example of signal bearing medium includes but is not limited to：Can
Recordable type medium, such as floppy disk, hard disk drive, compact-disc (CD), digital universal disc (DVD),
Digital magnetic tape, computer storage etc.；And transmission type media, such as numeral and/or simulation are logical
Believe medium (for example, optical fiber cable, waveguide, wired communications links, wireless communication link etc.).
Although exemplary embodiment describing the present invention with reference to several, it is to be understood that, it is used
Term is explanation and exemplary and nonrestrictive term.Because the present invention can be with a variety of shapes
Formula is embodied without departing from the spiritual or substantive of invention, it should therefore be appreciated that above-described embodiment
Any foregoing details is not limited to, and should be in the spirit and scope that appended claims are limited
Widely explain, therefore the whole changes fallen into claim or its equivalent scope and remodeling are all
Appended claims are should be to be covered.
Claims (19)
1. a kind of transmit the method that vehicle takes office communication (V2X) message of meaning equipment, including step
Suddenly：
Local gateway receives V2X message from base station；
The local gateway determines the Internet Protocol (IP) of the local V2X servers of the base station
Address；And
The V2X message is sent to described local by the local gateway according to the IP address
V2X servers.
2. the method for claim 1, wherein the local gateway determines the base
Internet Protocol (IP) address for the local V2X servers stood, including：
The local gateway obtains URL (URL) from the V2X message,
The URL is sent to domain name system (DNS) server, and from the dns server
Receive IP address corresponding with the URL.
3. the method for claim 1, wherein the local gateway determines the base
Internet Protocol (IP) address for the local V2X servers stood, including：
The local gateway obtains the information of URL and the base station from the V2X message,
The URL and the base station information are sent to dns server, and from DNS service
Device receives IP address corresponding with the URL and the base station information.
4. the method as described in claim 1, wherein the local gateway is independent local
Gateway either closes the local gateway set with the base station.
5. method as claimed in claim 2 or claim 3, wherein the local gateway preserves described
Corresponding relation between URL and the IP address, the transmission of the V2X packets for after.
6. a kind of transmit the method that vehicle takes office communication (V2X) message of meaning equipment, including step
Suddenly：
Base station receives the message from user equipment (UE)；
The base station determines that the message is V2X message, then is transmitted to the V2X message
Local V2X gateways for transmitting V2X message, so that the local V2X gateways will be described
Message is sent to local V2X servers.
7. method as claimed in claim 6, wherein the local V2X gateways preserve this
The IP address of ground V2X servers, or the local V2X gateways and local V2X servers
Between the passage that has built up.
8. method as claimed in claim 6, wherein, the V2X message is transmitted to use
In the local V2X gateways of transmission V2X message, including：
The base station receives the notification message of mobile management entity (MME), and the notice disappears
Cease for notifying that some carrying of base station is set up for V2X business；
V2X message is sent to the local V2X gateways by the base station by the carrying.
9. method as claimed in claim 8, wherein the notification message is the MME
The APN preserved in by user equipment (UE) context determines the UE applications
Sent in the case of V2X business.
10. a kind of transmission vehicle takes office the method for communication (V2X) message of meaning equipment, including
Step：
The spot broadcasting multicast module of first base station is received is produced by the V2X servers of first base station
Raw V2X message；And
The V2X message is sent to the first base station by the spot broadcasting multicast module, with
It is further transmitted to user equipment (UE).
11. method as claimed in claim 10, wherein the broadcast mode include multicast/
Multicast single-frequency network network (MBSFN) mode, single Cell Broadcast CB mode, pass through broadcast channel broadcasts
Mode or unicast mode.
12. method as claimed in claim 10, the V2X message is by the first base station
V2X servers be sent to the second base station, so that second base station is by the V2X message
It is sent to the UE of the second base station service.
13. method as claimed in claim 10, the V2X message is by the first base station
V2X servers be sent to the V2X servers of the second base station, so as to second base station
V2X servers by the V2X message via second base station local multicast broadcast module and
Second base station is sent to the UE of the second base station service.
14. method as claimed in claim 10, the V2X message is by the sheet of first base station
Ground broadcast group broadcast module is sent to other base stations by the interface between the second base station, with toilet
State the UE that the second base station is sent to the V2X message the second base station service.
15. a kind of gateway, is communicatively coupled with base station, the gateway includes：
Receiving unit, vehicle is received to communication (V2X) message of arbitrary equipment from the base station；
Processing unit, determines the Internet Protocol (IP) of the local V2X servers of the base station
Address；And
Transmitting element, the local V2X is sent to according to the IP address by the V2X message
Server.
16. a kind of base station, including：
Transceiver, receives the message from user equipment (UE)；
Whether processing unit, it is communication (V2X) of the vehicle to arbitrary equipment to determine the message
Message；
Transmitting element, in the case where processing unit determines that the message is V2X message, by institute
State V2X message and be transmitted to local V2X gateways for transmitting V2X message, so as to described
Ground V2X gateways send the message to local V2X servers.
17. a kind of broadcast group broadcast equipment, the communication (V2X) with base station and its vehicle to arbitrary equipment
Server is communicatively coupled, and the broadcast group broadcast equipment includes：
Receiving unit, receives the V2X message produced by the V2X servers of the base station；With
And
Transmitting element, is sent to the base station, to be further transmitted to use by the V2X message
Family equipment (UE).
18. a kind of communication system, including：
Base station, the communication (V2X) for receiving vehicle to arbitrary equipment from user equipment (UE) disappears
Cease and uplink；And
Local gateway, determines the Internet Protocol (IP) of the local V2X servers of the base station
Address, and the V2X message is sent to the local V2X clothes according to the IP address
Business device.
19. a kind of communication system, including：
Vehicle produces V2X message to communication (V2X) server of arbitrary equipment；
Spot broadcasting multicast module, receives the V2X message, and according to the broadcast possessed
Pattern sends the V2X message；And
V2X message, is sent to user equipment (UE) by base station.
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| US12047849B2 (en) | 2018-11-08 | 2024-07-23 | Lenovo (Beijing) Limited | Method and apparatus for groupcast connection establishment and transmission |
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