CN106413019A - Internet of vehicles (IOV) data transmission method and first forwarding device - Google Patents
Internet of vehicles (IOV) data transmission method and first forwarding device Download PDFInfo
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- CN106413019A CN106413019A CN201510466703.8A CN201510466703A CN106413019A CN 106413019 A CN106413019 A CN 106413019A CN 201510466703 A CN201510466703 A CN 201510466703A CN 106413019 A CN106413019 A CN 106413019A
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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
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Abstract
The invention discloses an Internet of vehicles (IOV) data transmission method and a first forwarding device to solve a problem that a conventional IOV data transmission method in the prior art cannot realize long-distance communication. The method comprises steps that the first forwarding device, after receiving a message transmitted from a terminal and carrying target geographical location information, selects a second forwarding device based on the target geographical location information and the geographical location information of N reserved forwarding devices to be selected, wherein a message transmission destination indicated by the target geographical location information has intersection with second forwarding device coverage indicated by the geographical location information of the second forwarding device; and the first forwarding device sends the message to the second forwarding device. Thus, the first forwarding device does not need to consider the distance between the first forwarding device and the transmission destination and transmits the received message to the transmission destination through the second forwarding device so that the first forwarding device can realize long-distance communication.
Description
Technical field
The present invention relates to communication technical field, more particularly, to a kind of car networking data transmission method and the first forwarding
Equipment.
Background technology
With social continuous development, the popularity also more and more higher of automobile, in order to improve the safety of vehicle,
And economy, the intelligent transportation system (Intelligent Transportation System, ITS) of Erecting and improving
It is the development need of society.In ITS, vehicle and other vehicles or roadside unit (Roud Side Unit,
) etc. RSU the network that communication between devices use becomes car networking.Vehicle in the process of moving, can pass through
The geographical location information of vehicle, fault message etc. are sent to the vehicle of specified range by car networking.
Traditional, European standard committee (European Telecommunications Standards Institute,
ETSI) define based on electronic apparatus IEEE (Institute of Electrical and Electronics
Engineers, IEEE) 802.11P agreement ITS, this ITS supports the network system based on geographical position
(GeoNetworking) support multi-hop communication.As shown in figure 1, the geographical position of vehicle 1 is (x, y),
If vehicle 1 needs rearward a range of vehicle 5 and vehicle 6 to send fault message, described certain model
Enclose can be 500 meters of vehicle 1 rear geographical position be the center of circle, the scope with 50 meters as radius, then car
1 can broadcast and carries source geographical position, be such as expressed as (x, y, r), target geographic position, such as table
It is shown as the GeoNetworking message of (x-500, y, 50) and fault message.Receive GeoNetworking
The vehicle of message, such as vehicle 5, vehicle 6 or other vehicles, determine whether to be in GeoNetworking
In the scope represented by target geographic position in message.If receiving the vehicle of GeoNetworking message
Determine in the scope being in represented by target geographic position, then receive the vehicle of GeoNetworking message
Obtain this message entrained fault message carry out respective handling.If receiving GeoNetworking report
The vehicle of literary composition determines in the scope being not at represented by target geographic position, then receive GeoNetworking
The vehicle of message judges whether the geographical position of itself is in source geographical position and two ground of target geographic position
Between reason position.If the geographical position receiving the vehicle of GeoNetworking message is in source address and mesh
Between mark geographical position, then the vehicle receiving GeoNetworking message continues to this GeoNetworking
Message is forwarded.If the geographical position receiving the vehicle of GeoNetworking message is not at source address
And target geographic position between, then the vehicle receiving GeoNetworking message judges the covering model of itself
Enclose with whether the scope represented by target geographic position has common factor, and in the case of there is common factor, forwarding should
GeoNetworking message.As shown in FIG., GeoNetworking message cannot directly be sent out by vehicle 1
Give vehicle 5 or vehicle 6, vehicle 1 can be by vehicle 2, vehicle 3 and vehicle 4, by GeoNetworking
Message is transmitted to vehicle 5 or vehicle 6.
In scene shown in Fig. 2, vehicle A needs to communicate with vehicle D, vehicle E or vehicle F, car
A can send GeoNetworking message by vehicle C to vehicle D, due to vehicle C and vehicle D
The distance between beyond communication range, vehicle D still cannot receive this GeoNetworking message,
Telecommunication cannot be realized.
Content of the invention
The embodiment of the present invention provides a kind of car networking data transmission method and the first forwarding unit, contributes to realizing
Telecommunication in car networking.
Concrete technical scheme provided in an embodiment of the present invention is as follows：
In a first aspect, providing a kind of car networking data transmission method, including：
The message carrying target geographic position information that first forwarding unit receiving terminal sends, described target ground
Reason positional information is used for indicating the transmission destination of described message；
Described first forwarding unit is according to the forwarding N number of to be selected of described target geographic position information and preservation
The geographical location information of equipment, selects the second forwarding unit, the geographical location information of described second forwarding unit
For indicating the coverage of described second forwarding unit, the coverage of described second forwarding unit with described
There is common factor in transmission destination, N is the integer more than or equal to 1；
Described first forwarding unit sends described message to described second forwarding unit.
In conjunction with a first aspect, in the first possible implementation of first aspect, when described transmission purpose
When ground is for a region, described target geographic position information includes the position of the central point of described transmission destination
With the radius of described transmission destination, the geographical location information of each forwarding unit to be selected includes：Described every
The radius of the coverage of the position of individual forwarding unit to be selected and each forwarding unit to be selected described；
Described first forwarding unit is according to the forwarding N number of to be selected of described target geographic position information and preservation
The geographical location information of equipment, selects the second forwarding unit, including：
In position and described transmission destination according to the i-th forwarding unit to be selected for described first forwarding unit
The position of heart point, obtains the first distance, the position of the central point for described transmission destination for described first distance
Distance and between the position of described i-th forwarding unit to be selected, the described i-th forwarding unit to be selected is described
Any one forwarding unit to be selected in N number of forwarding unit to be selected；
The radius of the coverage according to the described i-th forwarding unit to be selected for described first forwarding unit and described
The radius of transmission destination, obtains second distance, described second distance is the described i-th forwarding unit to be selected
The radius of coverage and described transmission destination radius sum；
If described first distance is treated described i-th less than described second distance, described first forwarding unit
The forwarding unit of choosing is as described second forwarding unit.
In conjunction with the first possible implementation of first aspect or first aspect, in the second of first aspect
In possible implementation, described first forwarding unit sends described message, bag to described second forwarding unit
Include：
Described first forwarding unit by described second forwarding unit between set up tunnel, to described second turn
The equipment of sending out sends described message.
Arbitrary to the possible implementation of second in conjunction with the first of first aspect or first aspect
Kind, in the third possible implementation of first aspect, described first forwarding unit is to described second turn
The equipment of sending out sends described message, including：
Described first forwarding unit obtains the internet protocol address of described second forwarding unit；And
According to the IP address of described second forwarding unit, described message is encapsulated as IP message；
Described first forwarding unit, according to the IP address of described second forwarding unit, forwards to described second and sets
Preparation send described IP message.
Any one to the third possible implementation in conjunction with the first of first aspect or first aspect
Kind, in the 4th kind of possible implementation of first aspect, described message is the network based on geographical position
System GeoNetworking message, carries described target in the heading of described GeoNetworking message
Geographical location information.
Any one to the 4th kind of possible implementation in conjunction with the first of first aspect or first aspect
Kind, in the 5th kind of possible implementation of first aspect, described first forwarding unit is according to described target
Geographical location information and the geographical location information of the forwarding unit N number of to be selected preserving, select second to forward and set
For before, methods described also includes：
Described first forwarding unit receives the geographical position of described N number of forwarding unit to be selected that controller sends
Confidence ceases；Or
What described first forwarding unit reception the 3rd forwarding unit sent carries described N number of forwarding to be selected
The routing protocol packet of the geographical location information of equipment.
In conjunction with the 5th kind of possible implementation of first aspect, in the 6th kind of possible realization of first aspect
In mode, described routing protocol packet is ospf ospf protocol message, described OSPF
The opaque information Opaque Information that protocol massages include is used for carrying described N number of forwarding to be selected
The geographical location information of equipment.
A kind of second aspect, there is provided first forwarding unit, including：
Receiving unit, the message carrying target geographic position information sending for receiving terminal, described target
Geographical location information is used for indicating the transmission destination of described message；
Select unit, for the forwarding unit N number of to be selected according to described target geographic position information and preservation
Geographical location information, select the second forwarding unit, the geographical location information of described second forwarding unit is used for
Indicate the coverage of described second forwarding unit, the coverage of described second forwarding unit and described transmission
Destination exists occurs simultaneously, and N is the integer more than or equal to 1；
Transmitting element, for sending described message to described second forwarding unit.
In conjunction with second aspect, in the first possible implementation of second aspect, when described transmission purpose
When ground is for a region, described target geographic position information includes the position of the central point of described transmission destination
With the radius of described transmission destination, the geographical location information of each forwarding unit to be selected includes：Described every
The radius of the coverage of the position of individual forwarding unit to be selected and each forwarding unit to be selected described；
Described select unit, specifically for：
The position of the central point of the position according to the i-th forwarding unit to be selected and described transmission destination, obtains
First distance, the position of central point for described transmission destination for described first distance and described i-th to be selected
Distance between the position of forwarding unit, the described i-th forwarding unit to be selected is that described N number of forwarding to be selected sets
Any one forwarding unit to be selected in standby；
The radius of the coverage according to the described i-th forwarding unit to be selected and the half of described transmission destination
Footpath, obtains second distance, and described second distance is the half of the coverage of the described i-th forwarding unit to be selected
The radius sum of footpath and described transmission destination；
If described first distance is less than described second distance, using the described i-th forwarding unit to be selected as
Described second forwarding unit.
In conjunction with the first possible implementation of second aspect or second aspect, in the second of second aspect
In possible implementation, described transmitting element, specifically for：
By the tunnel set up between described first forwarding unit and described second forwarding unit, to described second turn
The equipment of sending out sends described message.
Any one to the possible implementation of second in conjunction with the first of second aspect or second aspect
Kind, in the third possible implementation of second aspect, described first forwarding unit also includes processing list
Unit；
Described processing unit is used for obtaining the internet protocol address of described second forwarding unit；
Described processing unit is used for the IP address according to described second forwarding unit, and described message is encapsulated as
IP message；
Described transmitting element specifically for the IP address according to described second forwarding unit, to described second turn
The equipment of sending out sends described IP message.
Any one to the third possible implementation in conjunction with the first of second aspect or second aspect
Kind, in the 4th kind of possible implementation of second aspect, described message is the network based on geographical position
System GeoNetworking message, carries described target in the heading of described GeoNetworking message
Geographical location information.
Any one to the 4th kind of possible implementation in conjunction with the first of second aspect or second aspect
Kind, in the 5th kind of possible implementation of second aspect, it is used for selecting second turn in described select unit
Before the equipment of sending out, described receiving unit is additionally operable to receive described N number of forwarding unit to be selected that controller sends
Geographical location information；Or
Before described select unit is used for selecting the second forwarding unit, described receiving unit is additionally operable to receive the
The route association of the geographical location information carrying described N number of forwarding unit to be selected that three forwarding units send
View message.
In conjunction with the 5th kind of possible implementation of second aspect, in the 6th kind of possible realization of second aspect
In mode, described routing protocol packet is ospf ospf protocol message, described OSPF
The opaque information Opaque Information that protocol massages include is used for carrying described N number of forwarding to be selected
The geographical location information of equipment.
The car networking data transmission method being provided using the present invention, the first forwarding unit sends in receiving terminal
After carrying the message of target geographic position information, treated according to described target geographic position information and the N number of of preservation
The geographical location information of the forwarding unit of choosing, filters out the second forwarding unit, wherein, described target geographic position
Confidence ceases the transmission destination for indicating described message, and the geographical location information of described second forwarding unit is used
In the described second forwarding unit coverage of instruction, the coverage of described second forwarding unit and described transmission
Destination exists occurs simultaneously；Described first forwarding unit sends described message, so, institute to the second forwarding unit
State the distance that the first forwarding unit need not consider described first forwarding unit and described transmission destination, will receive
Message, be transferred in described transmission destination by the second forwarding unit, thus described first forwarding unit
Telecommunication can be realized.
Brief description
The car networking data transfer schematic diagram that Fig. 1 provides for prior art；
The telecommunication schematic diagram of a scenario that Fig. 2 provides for prior art；
Fig. 3 is a kind of network architecture schematic diagram of car networking provided in an embodiment of the present invention；
Fig. 4 is a kind of flow chart of car networking data transmission method provided in an embodiment of the present invention；
Fig. 5 is a kind of form schematic diagram of ospf protocol message provided in an embodiment of the present invention；
Fig. 6 is a kind of flow chart of car networking data transmission method provided in an embodiment of the present invention；
Fig. 7 is a kind of structural representation of first forwarding unit provided in an embodiment of the present invention；
Fig. 8 is a kind of structure chart of first forwarding unit provided in an embodiment of the present invention.
Specific embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing to this
Bright be described in further detail it is clear that described embodiment is only a part of embodiment of the present invention,
Rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
The all other embodiment being obtained under the premise of going out creative work, broadly falls into the scope of protection of the invention.
The embodiment of the present invention provides a kind of car networking data transmission method and device, in order to solve in prior art
The multi-hop communication technology existing cannot realize the problem of telecommunication.Wherein, method and apparatus is based on same
One inventive concept, because the principle of method and device solve problem is similar, the therefore enforcement of apparatus and method
Can be repeated no more in place of repetition with cross-reference.
Using technical solution of the present invention, the first forwarding unit carries target geographic position what receiving terminal sent
After the message of information, according to the ground of described target geographic position information and the forwarding unit N number of to be selected preserving
In reason positional information, filter out the second forwarding unit, wherein, described target geographic position information is used for indicating
The transmission destination of described message, the geographical location information of described second forwarding unit is used for indicating described second
Forwarding unit coverage, the coverage of described second forwarding unit is existed with described transmission destination to be handed over
Collection；Described first forwarding unit sends described message to the second forwarding unit, and so, described first forwarding sets
The standby distance that need not consider described first forwarding unit and described transmission destination, the message that will receive, passes through
Second forwarding unit is transferred in described transmission destination, thus described first forwarding unit can realize long distance
From communication.
Refering to Fig. 3, embodiments provide a kind of network architecture of car networking, including：Terminal 301,
Forwarding unit 302 and forwarding unit 303.The network architecture of car networking provided in an embodiment of the present invention is including
On the basis of described forwarding unit 302 and described forwarding unit 303, may also include at least one forwarding unit,
At least one forwarding unit described is the forwarding in addition to described forwarding unit 302 and described forwarding unit 303
Equipment.
Described terminal 301, can be complete for install in board units (On Board Unit, OBU), vehicle
Ball alignment system (Global Position System, GPS), radio frequency identification (Radio Frequency
Identification Devices, RFID), sensor or image first-class device.Described terminal 301 is used for
Collect or generate transport information, described transport information is used for the factor representing traffic or impact traffic, such as
Road ahead fault, vehicle trouble etc..Described terminal 301 generates according to described transport information and carries target ground
The message of reason positional information.Described target geographic position information is used for indicating the transmission destination of message.Described
Terminal 301 can be data message based on the described message that transport information generates or control message,
Here is not specifically limited.The described message that described terminal 301 broadcast is generated.
Described forwarding unit 302 and described forwarding unit 303 can be all router, such as RSU, or tool
There are the network equipments such as the compound switch of routing function.
Described forwarding unit 302 is used for receiving the described message of terminal 301 broadcast in its coverage, and root
According to the described target geographic position information carrying in described message, the described message receiving is forwarded to described turning
Send out equipment 303.Exist between the coverage of described forwarding unit 303 and described transmission destination and occur simultaneously.
Described forwarding unit 303 is used for receiving the described message that described forwarding unit 302 sends, and will receive
Described message broadcasting, enable the terminal being in the coverage of described forwarding unit 303 to receive institute
State message.So, the common factor between the coverage of described forwarding unit 303 and described transmission destination
When inside there is terminal 304, described terminal 304 can receive described message it is achieved that described message transmissions
To described transmission destination.
Can be by the physical link transmission of entity between described forwarding unit 302 and described forwarding unit 303
It is also possible to wirelessly transmit described message, the present invention does not limit described message to this.
Described message is wirelessly transmitted between described forwarding unit 302 and described terminal 301, with
Reason, also by wirelessly transmitting described message between described forwarding unit 303 and described terminal 304.
Refering to shown in Fig. 4, a kind of car networking data transmission method provided in an embodiment of the present invention, from first turn
Send out this side of equipment to illustrate.The present embodiments relate to the first forwarding unit, forwarding unit to be selected,
And the 3rd forwarding unit etc., can be router, such as RSU, or there is the compound of routing function
The network equipments such as switch.The method includes：
Step 401：The message carrying target geographic position information that first forwarding unit receiving terminal sends,
Described target geographic position information is used for indicating the transmission destination of described message.
Described first forwarding unit is the forwarding unit 302 in the network architecture of car networking shown in Fig. 3, institute
State the terminal 301 that terminal is in the network architecture of car networking shown in Fig. 3.
Illustrate, described message for data message or can control message, and the present invention is not construed as limiting to this.
After collecting or generating transport information, described terminal needs for described transport information to be sent to transmission described terminal
Destination, the such as regional extent at 500 meters of this terminal rear or the place at 500 meters of this terminal rear, wherein institute
Stating transmission destination can be described terminal acquiescence or described terminal setting.Described terminal is according to described
Transmission destination determines purpose geographical location information.Described terminal is according to described transport information and described target ground
Reason positional information, generates message.Optionally, described message is GeoNetworking message, described
Described target geographic position information is carried in the heading of GeoNetworking message.Described terminal broadcast institute
The described message generating.When described terminal is in the coverage of described first forwarding unit, described
One forwarding unit can receive the message carrying target geographic position information that described terminal sends.
Wherein, the transmission destination of the described message of target geographic position information instruction carrying in described message
Can be a region, or be one place.When described transmission destination is a region, described biography
Defeated destination can be border circular areas, or rectangular area, or other polygonal region, or
Ellipse, or other irregular graphics fields, the present invention does not limit to this.
When described transmission destination is border circular areas, described target geographic position information can comprise institute
State the position of the central point of transmission destination and the radius of described transmission destination.Described transmission destination
The position of central point can be latitude and longitude information or coordinate information.
When described transmission destination is a rectangular area, described target geographic position information can comprise institute
State position, angle, the first distance and the second distance of the central point of transmission destination.Described transmission purpose
The position of the central point on ground can be latitude and longitude information or coordinate information.Described angle is used for determining described transmission
Certain a line of destination and the angle of assigned direction.Described first distance is relative for described transmission destination
The distance between the position of central point of two sides and described transmission destination, described second distance is described
Between the relative two other side of transmission destination and the position of central point of described transmission destination away from
From.
When described transmission destination is an other polygonal region, described target geographic position information can
To comprise at least three latitude and longitude information or at least three coordinate informations.One latitude and longitude information represents described biography
The position on one summit of defeated destination.One coordinate information also illustrates that a summit of described transmission destination
Position.
When described transmission destination is one place, described target geographic position information can comprise a warp
Latitude information or a coordinate information.Described latitude and longitude information is used for representing the position of described transmission destination,
Described coordinate information is also used for representing the position of described transmission destination.
Optionally, described coordinate information can pass through transverse axis numerical value and longitudinal axis numerical value, represents described in the planes
The position of the central point of transmission destination, the position on first summit of described transmission destination, or described biography
The position of defeated destination.Described coordinate information can also pass through transverse axis numerical value, longitudinal axis data and Z axis data,
Represent first summit of the position of the central point of described transmission destination, described transmission destination in space
Position or described transmission destination position.
Optionally, when described transmission destination is a region and described message is reported for GeoNetworking
Wen Shi, the form of described GeoNetworking message broadcasts (Geographically-Scoped for geographic range
Broadcast, GBC) encapsulation format or geographic range Anycast (Geographically-Scoped Anycast,
GAC) encapsulation format.When described transmission destination, for one place and described message is GeoNetworking
During message, the form of described GeoNetworking message is geographic range unicast
(Geographically-Scoped Unicast, GUC) encapsulation format.
Step 402：Described first forwarding unit is treated according to described target geographic position information and the N number of of preservation
The geographical location information of the forwarding unit of choosing, selects the second forwarding unit, the geography of described second forwarding unit
Positional information is used for indicating the coverage of described secondth forwarding unit, the covering of described second forwarding unit
Scope is existed with described transmission destination occurs simultaneously, and N is the integer more than or equal to 1.
Described second forwarding unit is the forwarding unit 303 in the network architecture of car networking shown in Fig. 3.
Wherein, the coverage of the second forwarding unit can connect in broadcasting packet for described second forwarding unit
Receive the scope that the terminal of the message of described second forwarding unit broadcast is located.Target geographic position information indicates
The coverage of transmission destination and described second forwarding unit have common factor.Described first forwarding unit is by institute
State message to send to described second forwarding unit, described second forwarding unit can continue to broadcast described message.
Such as：Described second forwarding unit broadcasts described message into the coverage of described second forwarding unit, place
Terminal within described common factor can receive this message.Therefore, described first forwarding unit passes through to described
Second forwarding unit sends described message so that described second forwarding unit broadcasts described message it is achieved that by institute
State message transmissions to described transmission destination.
Optionally, in step 402, the geographical location information of a forwarding unit to be selected comprises a warp
Latitude information or a coordinate information.Described latitude and longitude information represents the position of described forwarding unit to be selected,
Described coordinate information also illustrates that the position of described forwarding unit to be selected.Described first forwarding unit can basis
Default described forwarding to be selected in the position of described forwarding unit to be selected and described first forwarding unit
The radius of the coverage of equipment, determines the coverage of described forwarding unit to be selected.
The geographical location information of described forwarding unit to be selected can also comprise described forwarding unit to be selected
The radius of the coverage of latitude and longitude information and described forwarding unit to be selected, or described forwarding to be selected sets
Standby geographical location information can also comprise the coordinate information of described forwarding unit to be selected and described to be selected
The radius of the coverage of forwarding unit.Described latitude and longitude information represents the position of described forwarding unit to be selected
Put, described coordinate information also illustrates that the position of described forwarding unit to be selected.Described first forwarding unit is permissible
The radius of the coverage of the position according to described forwarding unit to be selected and described forwarding unit to be selected,
Determine the coverage of described forwarding unit to be selected.
The geographical location information of described forwarding unit to be selected can also comprise at least three latitude and longitude information extremely
Few three coordinate informations.One latitude and longitude information represents one in the coverage of described forwarding unit to be selected
The position on summit.One coordinate information also illustrates that a summit in the coverage of described forwarding unit to be selected
Position.So, described first forwarding unit can be according in the coverage of described forwarding unit to be selected
The position on all summits, determines the coverage of described forwarding unit to be selected.
In the present embodiment, only so that the geographical location information of forwarding unit to be selected comprises coordinate information as a example.
The geographical location information of described N number of forwarding unit to be selected can be collected for described first forwarding unit
And preserve, or obtain from miscellaneous equipment for described first forwarding unit.
When the geographical location information of described N number of forwarding unit to be selected is described first forwarding unit from other
When equipment obtains, optionally, before execution step 402, also include：
Described first forwarding unit obtains the geographical location information of described N number of forwarding unit to be selected, and protects
Deposit.Wherein, described N number of forwarding unit to be selected be car networking in except described first forward forwarding unit in addition to
Forwarding unit.
Optionally, described first forwarding unit obtains the geographical position letter of described N number of forwarding unit to be selected
Breath, including following several ways：
First kind of way：Described N number of forwarding to be selected that described first forwarding unit receives controller transmission sets
Standby geographical location information；
The second way：It is described N number of that described first forwarding unit receives carrying of the 3rd forwarding unit transmission
The routing protocol packet of the geographical location information of forwarding unit to be selected.Described 3rd forwarding unit is car networking
In any one forwarding unit in addition to described first forwarding unit.
Optionally, described controller or described 3rd forwarding unit are sending described N number of forwarding unit to be selected
Geographical location information while, before or after, described controller or described 3rd forwarding unit acceptable
Send the Internet protocol (Internet of described N number of forwarding unit to be selected to described first forwarding unit
Protocol, IP) address.Optionally, described controller or described 3rd forwarding unit are sending described N
During the IP address of the geographical location information of individual forwarding unit to be selected and described N number of forwarding unit to be selected,
The geographical location information of N number of forwarding unit to be selected and the corresponding relation of IP address can be sent simultaneously, in this regard,
The present invention is not construed as limiting.
In first kind of way, in the network architecture of the car networking shown in Fig. 3, also include controller, car networking
In each forwarding unit all can send geographical location information and the IP address of itself to described controller.Can
Choosing, each forwarding unit described can adopt network configuration (Network Configuration, netconf)
Agreement, or open stream (OpenFlow) agreement, send the geographical position letter of itself to described controller
Breath and IP address, the present invention does not limit to this.Described controller is receiving each forwarding unit described
Geographical location information and IP address after, netconf agreement or OpenFlow agreement can be adopted, respectively
Send the ground of the other forwarding units in addition to any one forwarding unit described to any one forwarding unit
Reason positional information and IP address.So, each forwarding unit in described car networking all can obtain described car
The geographical location information of other forwarding units and IP address in networking, described other forwarding unit is as to be selected
Forwarding unit.Each forwarding unit is by the geographical location information of each forwarding unit to be selected obtaining and IP
Address is mapped, such as the geographical position of the forwarding unit to be selected preserving in the forwarding unit 1 shown in table 1
Confidence breath and IP address.
Optionally, described controller can pass through a packet, send to any one forwarding unit and remove institute
State the geographical location information of other forwarding units beyond any one forwarding unit and IP address.Described number
Carry geographical location information and the IP address of described other forwarding unit according to bag.
Optionally, described controller can also pass through multiple packets, send to any one forwarding unit and remove
The geographical location information of other forwarding units beyond any one forwarding unit described and IP address, for example,
Second forwarding unit geographical location information and IP address are encapsulated into the first packet by described controller, and will
3rd forwarding unit geographical location information and IP address are encapsulated into the second packet, then described controller to
Described first forwarding unit sends the first packet and the second packet.
Table 1
| The geographical location information of forwarding unit to be selected | IP address | Remarks |
| (x2, y2), r2 | 2001:2::2 | Forwarding unit 2 |
| (x3, y3), r3 | 2001:3::2 | Forwarding unit 3 |
| (x4, y4), r4 | 2001:4::2 | Forwarding unit 4 |
Wherein, coordinate information (xi, yi) is the position of forwarding unit i to be selected, and ri is described to be selected turning
Send out the radius of the coverage of equipment i, i is 1,2,3,4.
In the second way, carry the route of the geographical location information of described N number of forwarding unit to be selected
Protocol massages can be ospf (Open Shortest Path First, OSPF) agreement report
Literary composition or Border Gateway Protocol (Border Gateway Protocol, BGP) message.Described ospf protocol report
The form of literary composition can be Link State Advertisement (Link-State Advertisement, LSA) or opaque link
State broadcasts (Opaque Link-State Advertisement, OLSA), is provided with the 3rd in car networking
Forwarding unit, described 3rd forwarding unit is Designated Router (Designated Router, DR) or any
One forwarding unit, described 3rd forwarding unit is any one forwarding in addition to described first forwarding unit
Equipment.The other forwarding units in addition to described 3rd forwarding unit in described car networking all can be to described
Three forwarding units send the routing protocol packet of the geographical location information comprising itself and IP address.Described
Three forwarding units receive geographical location information and the IP address of other forwarding units.Described 3rd forwarding unit
After obtaining geographical location information and the IP address of itself, described 3rd forwarding unit forwards to any one again
Equipment sends the geographical location information of next-hop forwarding unit comprising any one forwarding unit described and IP
The routing protocol packet of address.The next-hop forwarding unit of any one forwarding unit described is and removes described
Other forwarding units beyond one forwarding unit of meaning.So, each forwarding unit in described car networking is equal
The geographical location information of other forwarding units and IP address in described car networking, described other forwardings can be obtained
Equipment is forwarding unit to be selected.Each forwarding to be selected described in acquisition is set by each forwarding unit described
Standby geographical location information and IP address are mapped, such as preserve in the forwarding unit 1 shown in table 2
The geographical location information of forwarding unit to be selected and IP address.
Table 2
| The geographical location information of forwarding unit to be selected | IP address | Interface | Remarks |
| (x2, y2), r2 | 2001:2::2 | IF0：2001:1::2 | Forwarding unit 2 |
| (x3, y3), r3 | 2001:3::2 | IF0：2001:1::2 | Forwarding unit 3 |
| (x4, y4), r4 | 2001:4::2 | IF0：2001:1::2 | Forwarding unit 4 |
Coordinate information (xi, yi) is the position of forwarding unit i to be selected, and ri is described forwarding unit to be selected
The radius of the coverage of i, i is 1,2,3,4.
When the routing protocol packet of the geographical location information carrying described N number of forwarding unit to be selected is
During ospf protocol message, the form of described ospf protocol message refers to shown in Fig. 5, wherein, described OSPF
Protocol massages be OLSA form, the LSA type (LS Type) in described ospf protocol message with pass
Value in the ospf protocol message of system is different, and the opaque type in described ospf protocol message
(Opaque Type) is also different from the value in traditional ospf protocol message, described ospf protocol report
LSA type in literary composition and opaque type are required to for the geographical position letter transmitting forwarding unit to be selected
Breath and IP address and redefined.Advertizing router (Advertising in described ospf protocol message
Router) field is used for carrying the IP address of at least one forwarding unit to be selected, described ospf protocol report
Opaque information (Opaque Information) field in literary composition sets for carrying at least one forwarding to be selected
Standby geographical location information.
When the transmission destination of described target geographic position information instruction is one place, described target geographic
Positional information comprises a coordinate information, and described coordinate information is also used for representing the position of described transmission destination
Put, the geographical location information of each forwarding unit to be selected includes：The position of each forwarding unit to be selected described
Put the radius with the coverage of each forwarding unit to be selected described.Step 402, comprises the following steps：
The position according to the i-th forwarding unit to be selected for described first forwarding unit and the position of described transmission destination
Put, obtain the first distance, described first distance for described transmission destination position and described i-th to be selected
The position of forwarding unit between distance, the described i-th forwarding unit to be selected is described N number of forwarding to be selected
Any one forwarding unit to be selected in equipment；
If the radius of the described first distance coverage of forwarding unit to be selected less than described i-th, institute
State the first forwarding unit using the described i-th forwarding unit to be selected as described second forwarding unit.
When the transmission destination of target geographic position information instruction is border circular areas, target geographic position
Information includes：The position of the central point of described transmission destination and the radius of described transmission destination, as described
The position of the central point of transmission destination is (0,500), and the radius of described transmission destination is 100, target
With (0,500) for the center of circle, the circle with 100 as radius is as transmission destination for geographical location information instruction；
The geographical position of each forwarding unit to be selected includes：The position of each each forwarding unit to be selected described
Put the radius with the coverage of each forwarding unit to be selected described, such as certain forwarding unit to be selected
Position is (0,100), and the radius of the coverage of described forwarding unit to be selected is 200, described to be selected
The geographical position instruction of forwarding unit is so that with (0,100), for the center of circle, the circle with 200 as radius is for transmitting purpose
Ground, the unit of data above can be rice.Optionally, execution step 402, comprise the following steps：
In position and described transmission destination according to the i-th forwarding unit to be selected for described first forwarding unit
The position of heart point, obtains the first distance, the position of the central point for described transmission destination for described first distance
Distance and between the position of described i-th forwarding unit to be selected, the described i-th forwarding unit to be selected is described
Any one forwarding unit to be selected in N number of forwarding unit to be selected；
The radius of the coverage according to the described i-th forwarding unit to be selected for described first forwarding unit and described
The radius of transmission destination, obtains second distance, described second distance is the described i-th forwarding unit to be selected
The radius of coverage and described transmission destination radius sum；
If described first distance is treated described i-th less than described second distance, described first forwarding unit
The forwarding unit of choosing is as described second forwarding unit.
Wherein, when described first distance is less than described second distance, the described i-th forwarding unit to be selected
Coverage is existed with described transmission destination occurs simultaneously.
Example 1, forwarding unit 1 receives the message carrying target geographic position information, described target geographic position
Information indicates the transmission destination of described message, and described target geographic position information includes described transmission destination
The position of central point be (0,450), the radius of described transmission destination is 50, preserves in forwarding unit 1
3 forwarding units to be selected geographical location information, as shown in table 3,
Table 3
Wherein, 0 in the geographical location information of forwarding unit 2 is the x2 in table 1, the ground of forwarding unit 2
In reason positional information 500 are the y2 in table 1, and 100 in the geographical location information of forwarding unit 2 are table
R2 in 1.
Forwarding unit 1 can adopt method provided in an embodiment of the present invention, obtains the first distance in table 4 and the
Two distances, will not be described here.
Table 4
| Forwarding unit to be selected | First distance | Second distance |
| Forwarding unit 2 | 50 | 150 |
| Forwarding unit 3 | 502 | 150 |
| Forwarding unit 4 | 538 | 150 |
As shown in Table 4, corresponding first distance of forwarding unit 2, less than second distance, represents that described forwarding sets
Standby 2 coverage is existed with described transmission destination occurs simultaneously, and from above coordinate data, described biography
Defeated destination is completely in the coverage of described forwarding unit 2.Therefore, described forwarding unit 1 selects institute
State forwarding unit 2, and send described message to described forwarding unit 2.
Example 2, forwarding unit 1 receives the message carrying target geographic position information, described target geographic position
Information indicates the transmission destination of described message, and described target geographic position information includes described transmission destination
The position of central point be (500,300), the radius of described transmission destination is 200, in forwarding unit 1
The geographical location information of 3 forwarding units to be selected preserving, still as shown in table 3, forwarding unit 1 determines
Corresponding first distance of each forwarding unit to be selected and second distance, as shown in table 5：
Table 5
| Forwarding unit to be selected | First distance | Second distance |
| Forwarding unit 2 | 538 | 150 |
| Forwarding unit 3 | 500 | 150 |
| Forwarding unit 4 | 50 | 150 |
As shown in Table 5, corresponding first distance of forwarding unit 3, less than second distance, represents that described forwarding sets
Standby 3 coverage is existed with described transmission destination occurs simultaneously, and corresponding first distance of forwarding unit 4 is also little
In second distance, represent that the coverage of forwarding unit 4 and described transmission destination there is also common factor, and by
Above coordinate data understands, described transmission destination part, in the coverage of forwarding unit 3, partly exists
In the coverage of described forwarding unit 4.Therefore, described forwarding unit 1 selects forwarding unit 3 and forwards
Equipment 4, and send described message to described forwarding unit 3 and forwarding unit 4 respectively.
Step 403：Described first forwarding unit sends described message to described second forwarding unit.
Specifically, in execution step 403, including：Described first forwarding unit by with described second turn
Send out the tunnel that equipment room is set up, send described message to described second forwarding unit.
The tunnel set up between described first forwarding unit and described second forwarding unit, can be to pre-build
, as received geographical location information and the IP of described second forwarding unit in described first forwarding unit
Behind address, or set up before execution step 403, the present invention does not limit to this.
Optionally, described first forwarding unit sets up the tunnel with described second forwarding unit, walks including following
Suddenly：
Obtain the IP address of described second forwarding unit；
According to the IP address of described second forwarding unit, set up the tunnel with described second forwarding unit.
Wherein, the IP address of described second forwarding unit can be internet protocol version 4 (Internet
Protocol Version 4, IPv4) address or internet protocol version 6 (Internet Protocol Version 6,
IPv6) address etc., there are various ways, such as generalized routing protocol encapsulation (Generic Routing in described tunnel
Encapsulation, GRE) tunnel, or various two layers or three layers of tunnel, the present invention does not limit to this
Fixed.
Optionally, in execution step 403, including：
Described first forwarding unit obtains the IP address of described second forwarding unit；And
According to the IP address of described second forwarding unit, described message is encapsulated as IP message；
Described first forwarding unit, according to the IP address of described second forwarding unit, forwards to described second and sets
Preparation send described IP message.
Wherein, because the IP address of described second forwarding unit can be IPv4 address or IPv6 address.When
When the IP address of described second forwarding unit is IPv4 address, the IP message of encapsulation is IPv4 message；When
When the IP address of described second forwarding unit is IPv6 address, the IP message of encapsulation is IPv6 message.
Specifically, when described message is encapsulated as IP message, this IP message includes source IP address, and
Purpose IP address, wherein source IP address as receive the IP address of the first forwarding unit of described message, mesh
IP address be described second forwarding unit IP address.
After step 403, after described second forwarding unit receives described message, described message is carried out extensively
Broadcast, wherein, when described first forwarding unit sends the IP message after encapsulation to described second forwarding unit,
The described IP message receiving is decapsulated by described second forwarding unit, generates original message, described
Original message is the described message that described first forwarding unit receives.Described second forwarding unit broadcast institute
State original message, so that the terminal being in the coverage of described second forwarding unit is received described
Message.So, in the common factor between the coverage of described second forwarding unit and described transmission destination
When there is terminal, this terminal can receive described message it is achieved that described message transmissions are to described transmission mesh
Ground.
Using the car networking data transmission method in the above embodiment of the present invention, the first forwarding unit is receiving eventually
After what end sent carries the message of target geographic position information, according to described target geographic position information and preservation
The geographical location information of forwarding unit N number of to be selected in, filter out the second forwarding unit, wherein, described
Target geographic position information is used for indicating the transmission destination of described message, the geography of described second forwarding unit
Positional information is used for indicating described second forwarding unit coverage, the coverage of described second forwarding unit
Exist with described transmission destination and occur simultaneously；Described first forwarding unit sends described report to the second forwarding unit
Literary composition, so, described first forwarding unit need not consider described first forwarding unit and described transmission destination
Distance, the message that will receive, it is transferred in described transmission destination by described second forwarding unit, thus
Described first forwarding unit can realize telecommunication.
In the embodiment above, the first forwarding unit will receive message and pass through forwarding unit (i.e. second
Forwarding unit) transmit described message, in actual applications, described first forwarding unit can pass through multiple turns
Send out message described in device transmission, in the present embodiment, only taking two forwarding units as a example, described first forwarding
Equipment transmits the flow process of described message and above-mentioned reality by any one forwarding unit in described two forwarding units
Apply example identical.Refering to shown in Fig. 6, specific flow process includes：
Step 601：The message carrying target geographic position information that first forwarding unit receiving terminal sends,
Described target geographic position information is used for indicating the transmission destination of described message.
Wherein, described message can be GeoNetworking message, described GeoNetworking message
Described target geographic position information is carried in heading.The target geographic position information carrying in described message refers to
The transmission destination of the described message showing can be a region, or is one place, specific expression side
Description in formula such as step 401, here is omitted.
Step 602：Described first forwarding unit is treated according to described target geographic position information and the N number of of preservation
The geographical location information of the forwarding unit of choosing, selection the second forwarding unit and the 3rd forwarding unit, described two
The geographical location information of forwarding unit is used for indicating the coverage of described second forwarding unit, described 3rd turn
The geographical location information of the equipment of sending out is used for indicating the coverage of described 3rd forwarding unit, described second forwarding
The coverage of equipment is existed with described transmission destination occurs simultaneously, the coverage of described 3rd forwarding unit with
There is common factor in described transmission destination, N is the integer more than or equal to 1.
Optionally, before execution step 602, also include：
Described first forwarding unit obtains the geographical location information of described N number of forwarding unit to be selected, and protects
Deposit.Wherein, described N number of forwarding unit to be selected be car networking in except described first forward forwarding unit in addition to
Forwarding unit.
Optionally, described first forwarding unit obtains the geographical position letter of described N number of forwarding unit to be selected
Breath, including following two modes：
First kind of way：Described N number of forwarding to be selected that described first forwarding unit receives controller transmission sets
Standby geographical location information；
The second way：It is described N number of that described first forwarding unit receives carrying of the 4th forwarding unit transmission
The routing protocol packet of the geographical location information of forwarding unit to be selected.Described 4th forwarding unit is car networking
In any one forwarding unit in addition to described first forwarding unit.Wherein, described routing protocol packet can
Think ospf protocol message or BGP message etc..When described routing protocol packet is ospf protocol message,
Opaque Information in described ospf protocol message sets for carrying at least one forwarding to be selected
Standby geographical location information.
When described transmission destination is a region, described target geographic position information includes described transmission mesh
The position of the central point on ground and described transmission destination radius, the geographical position of each forwarding unit to be selected
Confidence breath includes：The covering of the position of each forwarding unit to be selected described and each forwarding unit to be selected described
The radius of lid scope；
Described first forwarding unit is according to the forwarding N number of to be selected of described target geographic position information and preservation
The geographical location information of equipment, selects the second forwarding unit, including：
In position and described transmission destination according to the i-th forwarding unit to be selected for described first forwarding unit
The position of heart point, obtains the first distance, the position of the central point for described transmission destination for described first distance
Distance and between the position of described i-th forwarding unit to be selected, the described i-th forwarding unit to be selected is described
Any one forwarding unit to be selected in N number of forwarding unit to be selected；
The radius of the coverage according to the described i-th forwarding unit to be selected for described first forwarding unit and described
The radius of transmission destination, obtains second distance, described second distance is the described i-th forwarding unit to be selected
The radius of coverage and described transmission destination radius sum；
If described first distance is treated described i-th less than described second distance, described first forwarding unit
The forwarding unit of choosing is as described second forwarding unit.
In the same manner, described first forwarding unit is N number of to be selected with preserve according to described target geographic position information
The geographical location information of forwarding unit, selects the 3rd forwarding unit, including：
In position and described transmission destination according to the i-th forwarding unit to be selected for described first forwarding unit
The position of heart point, obtains the first distance, the position of the central point for described transmission destination for described first distance
Distance and between the position of described i-th forwarding unit to be selected, the described i-th forwarding unit to be selected is described
Any one forwarding unit to be selected in addition to the second forwarding unit in N number of forwarding unit to be selected；
The radius of the coverage according to the described i-th forwarding unit to be selected for described first forwarding unit and described
The radius of transmission destination, obtains second distance, described second distance is the described i-th forwarding unit to be selected
The radius of coverage and described transmission destination radius sum；
If described first distance is treated described i-th less than described second distance, described first forwarding unit
The forwarding unit of choosing is as described 3rd forwarding unit.
By step 602, described first forwarding unit can determine described transmission destination and described second turn
The coverage of the equipment of sending out has common factor, and the coverage of described transmission destination and described 3rd forwarding unit
There is common factor；Described message is respectively sent to described second forwarding unit and described by described first forwarding unit
After 3rd forwarding unit, after described second forwarding unit and the described 3rd forwarding unit described message of broadcast, make
It is in the coverage of described second forwarding unit, and the terminal in the range of described 3rd forwarding unit
Described message can be received.It is in described transmission destination and the coverage of described second forwarding unit
Terminal in common factor, and it is in the friendship of described transmission destination and the coverage of described 3rd forwarding unit
Terminal in collection, all can receive described message.Therefore, described first forwarding unit forwards by second and sets
Standby and the 3rd forwarding unit send described message it is achieved that described message transmissions to this message transmission purpose
Ground.So, described first forwarding unit need not consider described first forwarding unit and described transmission destination
Distance, the message that will receive, described transmission purpose is transferred to by the second forwarding unit and the 3rd forwarding unit
In ground, such that it is able to realize telecommunication.
Step 603：Described first forwarding unit is respectively to described second forwarding unit and described 3rd forwarding
Equipment sends described message.
Specifically, in execution step 603, including：
Described first forwarding unit by described second forwarding unit between set up tunnel, to described second turn
The equipment of sending out sends described message；
Described first forwarding unit by described 3rd forwarding unit between set up tunnel, to described second turn
The equipment of sending out sends described message.
Specifically, described first forwarding unit sends described message to described second forwarding unit, including：
Described first forwarding unit obtains the IP address of described second forwarding unit；And
According to the IP address of described second forwarding unit, described message is encapsulated as IP message；
Described first forwarding unit, according to the IP address of described second forwarding unit, forwards to described second and sets
Preparation send described IP message.
In the same manner, described first forwarding unit sends described message to described 3rd forwarding unit, including：
Described first forwarding unit obtains the IP address of described 3rd forwarding unit；And
According to the IP address of described 3rd forwarding unit, described message is encapsulated as IP message；
Described first forwarding unit, according to the IP address of described 3rd forwarding unit, forwards to the described 3rd and sets
Preparation send described IP message.
After step 603, after described second forwarding unit receives described message, described message is carried out extensively
Broadcast, after described 3rd forwarding unit receives described message, described message is broadcasted, wherein, work as institute
State the first forwarding unit to send after encapsulation to described second forwarding unit and described 3rd forwarding unit respectively
During IP message, the IP message of reception is carried out by described second forwarding unit and described 3rd forwarding unit respectively
Decapsulation, generates original message, described original message is the message that the first forwarding unit receives.Institute
State the second forwarding unit and broadcast described original message, in the coverage making be in described second forwarding unit
Terminal can receive described message；Described 3rd forwarding unit broadcasts described original message, makes to be in
Terminal in the coverage of described 3rd forwarding unit can receive described message.So, described
When there is terminal in the common factor between the coverage of two forwarding units and described transmission destination, this terminal energy
Enough receive described message；Friendship between the coverage of described 3rd forwarding unit and described transmission destination
When there is terminal in collection, this terminal can receive described message it is achieved that described message transmissions are to described biography
Defeated destination.So, because described first forwarding unit need not consider described first forwarding unit and described biography
The distance of defeated destination, the message that will receive, by described second forwarding unit and described 3rd forwarding unit
It is transferred in described transmission destination, thus described first forwarding unit can realize telecommunication.
Based on above example, present invention also offers a kind of first forwarding unit, described first forwarding unit
The method that can be provided using the corresponding embodiment of Fig. 4, refering to shown in Fig. 7, described first forwarding unit 700
Including：Receiving unit 701, select unit 702 and transmitting element 703.Alternatively, described first turn
Send out equipment 700 and also include processing unit 704.
Described receiving unit 701 is used for the message carrying target geographic position information that receiving terminal sends, institute
State target geographic position information for indicating the transmission destination of described message.
N number of to be selected the turning that described select unit 702 is used for according to described target geographic position information and preserves
The geographical location information of the equipment of sending out, selects the second forwarding unit, the geographical position letter of described second forwarding unit
Cease the coverage for indicating described second forwarding unit, the coverage of described second forwarding unit and institute
State transmission destination and there is common factor, N is the integer more than or equal to 1.
Described transmitting element 703 is used for sending described message to described second forwarding unit.
Optionally, when described transmission destination is a region, described target geographic position information includes institute
State the position of the central point of transmission destination and the radius of described transmission destination, each forwarding unit to be selected
Geographical location information include：The position of each forwarding unit to be selected described and each forwarding to be selected described
The radius of the coverage of equipment；
Described select unit 702, specifically for：
The position of the central point of the position according to the i-th forwarding unit to be selected and described transmission destination, obtains
First distance, the position of central point for described transmission destination for described first distance and described i-th to be selected
Distance between the position of forwarding unit, the described i-th forwarding unit to be selected is that described N number of forwarding to be selected sets
Any one forwarding unit to be selected in standby；
The radius of the coverage according to the described i-th forwarding unit to be selected and the half of described transmission destination
Footpath, obtains second distance, and described second distance is the half of the coverage of the described i-th forwarding unit to be selected
The radius sum of footpath and described transmission destination；
If described first distance is less than described second distance, using the described i-th forwarding unit to be selected as
Described second forwarding unit.
Optionally, described transmitting element 703, specifically for：
By the tunnel set up between described first forwarding unit and described second forwarding unit, to described second turn
The equipment of sending out sends described message.
Optionally, described first forwarding unit 700 also includes processing unit 704；
Described processing unit 704 is used for obtaining the internet protocol address of described second forwarding unit；
Described processing unit 704 is used for the IP address according to described second forwarding unit, and described message is sealed
Fill as IP message；
Described transmitting element 703 specifically for the IP address according to described second forwarding unit, to described
Two forwarding units send described IP message.
Optionally, described message is the network system GeoNetworking message based on geographical position, described
Described target geographic position information is carried in the heading of GeoNetworking message.
Optionally, before described select unit 702 is used for selecting the second forwarding unit, described receiving unit
701 are additionally operable to receive the geographical location information of described N number of forwarding unit to be selected that controller sends；Or
Before described select unit 702 is used for selecting the second forwarding unit, described receiving unit 701 is also used
In the geographical location information carrying described N number of forwarding unit to be selected receiving the 3rd forwarding unit transmission
Routing protocol packet.
Optionally, described routing protocol packet is ospf ospf protocol message, described
The opaque information Opaque Information that ospf protocol message includes is used for carrying described N number of to be selected
Forwarding unit geographical location information.
It should be noted that being schematic to the division of unit in the embodiment of the present invention, only one kind is patrolled
Volume function divides, and actual can have other dividing mode when realizing.In addition, in each embodiment of the application
In each functional unit can be integrated in a processing unit or the independent physics of unit is deposited
It is also possible to two or more units are integrated in a unit.Above-mentioned integrated unit both can be adopted
Realized with the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If described integrated unit is realized and as independent production marketing using in the form of SFU software functional unit
Or when using, can be stored in a computer read/write memory medium.Based on such understanding, this Shen
Part that technical scheme please substantially contributes to prior art in other words or this technical scheme complete
Portion or partly can be embodied in the form of software product, this computer software product is stored in a storage
In medium, including some instructions with so that computer equipment (can be personal computer, server,
Or network equipment etc.) or processor (processor) execute each embodiment methods described of the application complete
Portion or part steps.And aforesaid storage medium includes：USB flash disk, portable hard drive, read only memory (ROM,
Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic
Dish or CD etc. are various can be with the medium of store program codes.
Based on above example, present invention also offers a kind of first forwarding unit, described first forwarding unit
The method that can be provided using the corresponding embodiment of Fig. 4, can be identical with the first forwarding unit shown in Fig. 7
Equipment.Refering to shown in Fig. 8, this first forwarding unit equipment 800 includes：Communication interface 801, process
Device 802, bus 803 and memorizer 804, wherein：
Communication interface 801, processor 802 and memorizer 804 are connected with each other by bus 803；Bus
803 can be Peripheral Component Interconnect standard (peripheral component interconnect, abbreviation PCI)
Bus or EISA (extended industry standard architecture, abbreviation EISA)
Bus etc..Described bus can be divided into address bus, data/address bus, controlling bus etc..For ease of representing,
Only represented with a thick line in Fig. 8, it is not intended that only one bus or a type of bus.
Communication interface 801 is used for being communicated with terminal and other forwarding units, and terminal as described in receive is sent out
The message carrying target geographic position information sending, sends described message to the second forwarding unit.
Processor 802 is used for：
The message carrying target geographic position information that receiving terminal sends, described target geographic position information is used
In the transmission destination indicating described message；
Geographical position letter according to described target geographic position information and the forwarding unit N number of to be selected preserving
Breath, selects the second forwarding unit, and the geographical location information of described second forwarding unit is used for indicating described second
The coverage of forwarding unit, the coverage of described second forwarding unit is existed with described transmission destination to be handed over
Collection, N is the integer more than or equal to 1；
Send described message to described second forwarding unit.
Optionally, when described transmission destination is a region, described target geographic position information includes institute
State the position of the central point of transmission destination and the radius of described transmission destination, each forwarding unit to be selected
Geographical location information include：The position of each forwarding unit to be selected described and each forwarding to be selected described
The radius of the coverage of equipment；
Geographical position letter according to described target geographic position information and the forwarding unit N number of to be selected preserving
Breath, selects the second forwarding unit, including：
The position of the central point of the position according to the i-th forwarding unit to be selected and described transmission destination, obtains
First distance, the position of central point for described transmission destination for described first distance and described i-th to be selected
Distance between the position of forwarding unit, the described i-th forwarding unit to be selected is that described N number of forwarding to be selected sets
Any one forwarding unit to be selected in standby；
The radius of the coverage according to the described i-th forwarding unit to be selected and the half of described transmission destination
Footpath, obtains second distance, and described second distance is the half of the coverage of the described i-th forwarding unit to be selected
The radius sum of footpath and described transmission destination；
If described first distance is less than described second distance, using the described i-th forwarding unit to be selected as
Described second forwarding unit.
This first forwarding unit 800 also includes memorizer 804, is used for depositing program etc..Specifically, program
Program code can be included, this program code includes computer-managed instruction.Memorizer 804 may comprise with
Machine access memorizer (random access memory, RAM) is it is also possible to also include non-volatile memories
Device (non-volatile memory), for example, at least one disk memory.Processor 802 executes storage
The application program that device 804 is deposited, realizes as above car networking data transmission method.
Car networking data transmission method provided in an embodiment of the present invention and the first forwarding unit, the first forwarding unit
Receiving terminal send carry the message of target geographic position information after, believed according to described target geographic position
In the geographical location information of forwarding unit N number of to be selected of breath and preservation, filter out the second forwarding unit, its
In, described target geographic position information is used for indicating the transmission destination of described message, and described second forwarding sets
Standby geographical location information is used for indicating described second forwarding unit coverage, described second forwarding unit
Coverage is existed with described transmission destination occurs simultaneously；Described first forwarding unit sends to the second forwarding unit
Described message, so, described first forwarding unit need not consider described first forwarding unit and described transmission mesh
Ground distance, will receive message, be transferred in described transmission destination by described second forwarding unit,
Thus described first forwarding unit can realize telecommunication.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know base
This creative concept, then can make other change and modification to these embodiments.So, appended right will
Ask and be intended to be construed to including preferred embodiment and fall into being had altered and changing of the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not take off to the embodiment of the present invention
Spirit and scope from the embodiment of the present invention.So, if these modifications of the embodiment of the present invention and modification belong to
Within the scope of the claims in the present invention and its equivalent technologies, then the present invention be also intended to comprise these change and
Including modification.
Claims (14)
1. a kind of car networking data transmission method is it is characterised in that methods described includes：
The message carrying target geographic position information that first forwarding unit receiving terminal sends, described target ground
Reason positional information is used for indicating the transmission destination of described message；
Described first forwarding unit is according to the forwarding N number of to be selected of described target geographic position information and preservation
The geographical location information of equipment, selects the second forwarding unit, the geographical location information of described second forwarding unit
For indicating the coverage of described second forwarding unit, the coverage of described second forwarding unit with described
There is common factor in transmission destination, N is the integer more than or equal to 1；
Described first forwarding unit sends described message to described second forwarding unit.
2. the method for claim 1 is it is characterised in that working as described transmission destination is an area
During domain, described target geographic position information includes the position of central point of described transmission destination and described transmission
The radius of destination, the geographical location information of each forwarding unit to be selected includes：Each to be selected turning described
The radius of the coverage of the position of the equipment of sending out and each forwarding unit to be selected described；
Described first forwarding unit is according to the forwarding N number of to be selected of described target geographic position information and preservation
The geographical location information of equipment, selects the second forwarding unit, including：
In position and described transmission destination according to the i-th forwarding unit to be selected for described first forwarding unit
The position of heart point, obtains the first distance, the position of the central point for described transmission destination for described first distance
Distance and between the position of described i-th forwarding unit to be selected, the described i-th forwarding unit to be selected is described
Any one forwarding unit to be selected in N number of forwarding unit to be selected；
The radius of the coverage according to the described i-th forwarding unit to be selected for described first forwarding unit and described
The radius of transmission destination, obtains second distance, described second distance is the described i-th forwarding unit to be selected
The radius of coverage and described transmission destination radius sum；
If described first distance is treated described i-th less than described second distance, described first forwarding unit
The forwarding unit of choosing is as described second forwarding unit.
3. method as claimed in claim 1 or 2 is it is characterised in that described first forwarding unit is to institute
State the second forwarding unit and send described message, including：
Described first forwarding unit by described second forwarding unit between set up tunnel, to described second turn
The equipment of sending out sends described message.
4. the method as described in any one of claim 1-3 is it is characterised in that described first forwarding unit
Send described message to described second forwarding unit, including：
Described first forwarding unit obtains the internet protocol address of described second forwarding unit；And
According to the IP address of described second forwarding unit, described message is encapsulated as IP message；
Described first forwarding unit, according to the IP address of described second forwarding unit, forwards to described second and sets
Preparation send described IP message.
5. the method as described in any one of claim 1-4 it is characterised in that described message be based on
The network system GeoNetworking message of reason position, in the heading of described GeoNetworking message
Carry described target geographic position information.
6. the method as described in any one of claim 1-5 is it is characterised in that described first forwarding unit
According to the geographical location information of described target geographic position information and the forwarding unit N number of to be selected preserving, choosing
Before selecting the second forwarding unit, methods described also includes：
Described first forwarding unit receives the geographical position of described N number of forwarding unit to be selected that controller sends
Confidence ceases；Or
What described first forwarding unit reception the 3rd forwarding unit sent carries described N number of forwarding to be selected
The routing protocol packet of the geographical location information of equipment.
7. method as claimed in claim 6 is it is characterised in that described routing protocol packet is open
SPF ospf protocol message, opaque information Opaque that described ospf protocol message includes
Information is used for carrying the geographical location information of described N number of forwarding unit to be selected.
8. a kind of first forwarding unit is it is characterised in that described first forwarding unit includes：
Receiving unit, the message carrying target geographic position information sending for receiving terminal, described target
Geographical location information is used for indicating the transmission destination of described message；
Select unit, for the forwarding unit N number of to be selected according to described target geographic position information and preservation
Geographical location information, select the second forwarding unit, the geographical location information of described second forwarding unit is used for
Indicate the coverage of described second forwarding unit, the coverage of described second forwarding unit and described transmission
Destination exists occurs simultaneously, and N is the integer more than or equal to 1；
Transmitting element, for sending described message to described second forwarding unit.
9. the first forwarding unit as claimed in claim 8 is it is characterised in that work as described transmission destination
During for a region, described target geographic position information include described transmission destination the position of central point and
The radius of described transmission destination, the geographical location information of each forwarding unit to be selected includes：Described each
The radius of the coverage of the position of forwarding unit to be selected and each forwarding unit to be selected described；
Described select unit, specifically for：
The position of the central point of the position according to the i-th forwarding unit to be selected and described transmission destination, obtains
First distance, the position of central point for described transmission destination for described first distance and described i-th to be selected
Distance between the position of forwarding unit, the described i-th forwarding unit to be selected is that described N number of forwarding to be selected sets
Any one forwarding unit to be selected in standby；
The radius of the coverage according to the described i-th forwarding unit to be selected and the half of described transmission destination
Footpath, obtains second distance, and described second distance is the half of the coverage of the described i-th forwarding unit to be selected
The radius sum of footpath and described transmission destination；
If described first distance is less than described second distance, using the described i-th forwarding unit to be selected as
Described second forwarding unit.
10. the first forwarding unit as claimed in claim 8 or 9 is it is characterised in that described transmitting element,
Specifically for：
By the tunnel set up between described first forwarding unit and described second forwarding unit, to described second turn
The equipment of sending out sends described message.
11. the first forwarding units as described in any one of claim 8-10 are it is characterised in that described first
Forwarding unit also includes processing unit；
Described processing unit is used for obtaining the internet protocol address of described second forwarding unit；
Described processing unit is used for the IP address according to described second forwarding unit, and described message is encapsulated as
IP message；
Described transmitting element specifically for the IP address according to described second forwarding unit, to described second turn
The equipment of sending out sends described IP message.
12. the first forwarding units as described in any one of claim 8-11 are it is characterised in that described message
It is the network system GeoNetworking message based on geographical position, described GeoNetworking message
Described target geographic position information is carried in heading.
13. the first forwarding units as described in any one of claim 8-12 it is characterised in that
Before described select unit is used for selecting the second forwarding unit, described receiving unit is additionally operable to receive control
The geographical location information of described N number of forwarding unit to be selected that device processed sends；Or
Before described select unit is used for selecting the second forwarding unit, described receiving unit is additionally operable to receive the
The route association of the geographical location information carrying described N number of forwarding unit to be selected that three forwarding units send
View message.
14. first forwarding units as claimed in claim 13 are it is characterised in that described Routing Protocol report
Literary composition is ospf ospf protocol message, and it is opaque that described ospf protocol message includes
Information Opaque Information is used for carrying the geographical location information of described N number of forwarding unit to be selected.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510466703.8A CN106413019B (en) | 2015-07-31 | 2015-07-31 | Internet of vehicles data transmission method and first forwarding equipment |
| PCT/CN2016/091780 WO2017020759A1 (en) | 2015-07-31 | 2016-07-26 | Internet of vehicles data transmission method and first forwarding device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510466703.8A CN106413019B (en) | 2015-07-31 | 2015-07-31 | Internet of vehicles data transmission method and first forwarding equipment |
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Also Published As
| Publication number | Publication date |
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| CN106413019B (en) | 2020-02-11 |
| WO2017020759A1 (en) | 2017-02-09 |
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