CN107276902A - The car networking route addressing method that geographical position is combined with IP address - Google Patents
The car networking route addressing method that geographical position is combined with IP address Download PDFInfo
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- CN107276902A CN107276902A CN201710438982.6A CN201710438982A CN107276902A CN 107276902 A CN107276902 A CN 107276902A CN 201710438982 A CN201710438982 A CN 201710438982A CN 107276902 A CN107276902 A CN 107276902A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/52—Network services specially adapted for the location of the user terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
Abstract
The present invention provides the car networking route addressing method that a kind of geographical position is combined with IP address.The car networking route addressing method that geographical position of the present invention is combined with IP address includes：RSU receives the first request data package that OBU is sent；The RSU stores the corresponding relation of the first interface information and the first position information；The RSU obtains first data division；The RSU sends first data division to the server；The RSU receives the second packet that the OBU is sent；RSU updates the first position information of the OBU；The RSU receives the first response data packet that the server is sent；The RSU obtains the interface message in the IP address of the OBU；The RSU obtains corresponding first position information；The RSU determines next-hop OBU；The RSU sends first response data packet to the next-hop OBU.The present invention is combined by geographical position with IP address so that can be according to the most suitable route approach of other side's geographical location choice during transmission packet between OBU and RSU.
Description
Technical field
The present invention relates to bus or train route coordination technique, more particularly to a kind of geographical position and Internet protocol (Internet
Protocol, hereinafter referred to as IP) address combine car networking route addressing method.
Background technology
Bus or train route coordination technique is intelligent transportation field important component, it be by Internet of Things, cloud computing, mobile interchange and
Data communication transmission technology etc. is effectively integrated, and applies to the communication technology that real time data is transmitted between vehicle and server.Car
Road collaboration can build vehicle and the extraneous bridge for carrying out information exchange by multiple technologies means, improve transport information interaction
Real-time, high efficiency.
In existing car cloud client service communication system, the information that carry out between vehicle network and public network is passed
Pass, board units (On Board Unit, hereinafter referred to as OBU) generally require by roadside unit (Road Side Unit, with
Lower abbreviation RSU) it is used as the middle channel of communication with the outside world.In the unlapped region of roadside unit, the first board units calculate adjacent
The relative distance of board units and roadside unit is occupied, the neighbours nearest apart from roadside unit are given vehicle-mounted list by request data package
Member, then proceed the process that request data package is transmitted to roadside unit from neighbours' board units.It is simultaneously first vehicle-mounted to make
The Route Selection that unit can be determined when receiving response data packet, the first board units also use current location information pair
Raw requests packet is encapsulated again, so that roadside unit can calculate which specific neighbours' board units distance the
One board units recently, and then choose neighbours' board units progress response data packet forwarding.
However, using the method for prior art, board units complete high-speed mobile after request data package is sent, and can make please
The positional information in packet is asked to fail, route easily occurs when sending response data packet to board units in roadside unit
Failure.
The content of the invention
The present invention provides the car networking route addressing method that a kind of geographical position is combined with IP address, to solve prior art
Positional information fails when middle board units are route with roadside unit data, and then causes roadside unit sending sound to board units
When answering packet, the problem of routing failure easily occurs.
In a first aspect, the present invention provides the car networking route addressing method that a kind of geographical position is combined with IP address, including：
Drive test unit R SU receives the first request data package that board units OBU is sent, and first request data package is included
The first position information and first interface information of the OBU is included in first packet header, the first data division, first packet header,
First data division includes the IP address kimonos for including the OBU in the second packet header and the second data division, second packet header
The IP address of business device, second data division includes port numbers；
The RSU stores the corresponding relation of the first interface information and the first position information；
The RSU obtains first data division；
The RSU sends first data division to the server；
The RSU receive in the second packet that the OBU is sent, second packet comprising second place information and
Second interface information；
If the second interface information is identical with the first interface information, the RSU is according to the second confidence
Breath updates the first position information of the OBU；
The RSU, which is received, includes institute in the first response data packet that the server is sent, first response data packet
State OBU IP address and port numbers；
The RSU obtains the interface message in the IP address of the OBU；
The RSU is obtained and the interface message identical first interface information corresponding first according to the interface message
Positional information；
The RSU determines next-hop OBU according to the first position information and the vehicle neighbor table of the RSU；
The RSU sends first response data packet to the next-hop OBU.
Further, the RSU receives the second packet that the OBU is sent with predetermined period.
Further, the RSU broadcasts the position comprising the RSU in the IP address of the RSU, the IP address and believed
Breath.
Second aspect, the present invention provides the car networking route addressing method that a kind of geographical position is combined with IP address, including：
OBU sends the first request data package to RSU, and first request data package includes the first packet header, the first data portion
Point, the first position information and first interface information of the OBU is included in first packet header, the first data division includes second
IP address comprising the OBU and the IP address of server, described second in packet header and the second data division, second packet header
Data division includes port numbers；
The OBU sends to the RSU and second place information and second is included in the second packet, second packet
Interface message；
The OBU receives the first response data packet that the RSU is sent.
Further, the OBU sends the first request data package to RSU, including：
The OBU obtains the IP address of the RSU；
The OBU obtains next-hop OBU according to the IP address of the RSU and the vehicle neighbor table of the OBU；
The OBU sends first request data package to the next-hop OBU.
Further, the OBU obtains next-hop according to the IP address of the RSU and the vehicle neighbor table of the OBU
OBU, including：
The OBU according toObtain each in the vehicle neighbor table
The corresponding score value of neighbours；
It is the next-hop OBU to determine the maximum OBU of the score value.
Further, after the RSU of OBU receptions RSU broadcast IP address, in addition to：
The OBU forwards the IP address of the RSU.
Further, the car networking route addressing method that above-mentioned geographical position is combined with IP address also includes：
Media access control (the Media of the OBU is included in the OBU broadcast data links frame, the data link frame
Access Control, hereinafter referred to as MAC) address, the positional information of the OBU and received signal strength indicator (Received
Signal Strength Indication, hereinafter referred to as RSSI).
The car networking route addressing method that the geographical position that the present invention is provided is combined with IP address, passes through roadside unit RSU
The first request data package that board units OBU is sent is received, RSU stores the first interface included in the first request data package
The corresponding relation of information and the first position information；RSU obtains the first data division in the first request data package；And to institute
State server and send first data division；RSU is received in the second packet that the OBU is sent, second packet
Include second place information and second interface information；If the second interface information is identical with the first interface information, institute
State RSU OBU according to second place information updating first position information；The RSU receives the server and sent
The first response data packet, the IP address and port numbers of the OBU is included in first response data packet；The RSU is obtained
Interface message in the IP address of the OBU；The RSU is obtained and the interface message identical the according to the interface message
The corresponding first position information of one interface message；The RSU is according to the first position information and the vehicle neighbours of the RSU
Table, determines next-hop OBU；The RSU sends first response data packet to the next-hop OBU.Pass through the second data
The positional information for the OBU that upgrades in time is wrapped, so that RSU can accurately know OBU when sending the first response data packet to OBU
Positional information, to be route according to accurate OBU positional information so that, reduce routing failure probability.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the flow chart for the car networking route addressing method embodiment one that geographical position of the present invention is combined with IP address；
Fig. 2 is one kind that the car networking route addressing method embodiment one that geographical position of the present invention is combined with IP address is provided
First request data package structure chart；
Fig. 3 is one kind that the car networking route addressing method embodiment one that geographical position of the present invention is combined with IP address is provided
The data format figure of keep-alive information table；
Fig. 4 is one kind that the car networking route addressing method embodiment one that geographical position of the present invention is combined with IP address is provided
The data format figure of vehicle neighbor table；
Fig. 5 is the another of the offer of car networking route addressing method embodiment one that geographical position of the present invention is combined with IP address
Plant the data format figure of the second packet；
Fig. 6 is the flow chart for the car networking route addressing method embodiment two that geographical position of the present invention is combined with IP address；
Fig. 7 is one kind that the car networking route addressing method embodiment three that geographical position of the present invention is combined with IP address is provided
The data format figure of RSU IPv6 addresses；
Fig. 8 is the flow chart for the car networking route addressing method example IV that geographical position of the present invention is combined with IP address；
Fig. 9 is the flow chart for the car networking route addressing method embodiment five that geographical position of the present invention is combined with IP address；
Figure 10 is one that the car networking route addressing method embodiment eight that geographical position of the present invention is combined with IP address is provided
Plant the maintaining method flow chart of vehicle neighbor table.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
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
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 1 is the flow chart for the car networking route addressing method embodiment one that geographical position of the present invention is combined with IP address,
As shown in figure 1, the method for the present embodiment can include：
Step 101, RSU receive the first request data package that OBU is sent.
Wherein, a kind of possible structure of the first request data package is as shown in Fig. 2 Fig. 2 is geographical position of the present invention and IP
A kind of first request data package structure chart that the car networking route addressing method embodiment one that address is combined is provided, the first number of request
The first position information comprising the OBU and first interface letter in the first packet header, the first data division, first packet header are included according to bag
Breath, first position information can carry the subnet fields in IP address.First data division includes the second packet header and the second data
IP address comprising the OBU and the IP address of server in part, second packet header, second data division include port numbers,
The port numbers are taken from transport layer data packet header.
Wherein, other information can also be included in the first packet header, for example：IP address comprising the RSU is simultaneously used as purpose IP
Address, determines whether to receive the first request data package for RSU.
The corresponding relation of step 102, RSU storage first interface information and first position information.
Wherein, the corresponding relation of first interface information and first position information can be stored and tieed up with the form of table
Shield.
Optionally, interface message as IP address a part, for example：End 64bit believes for interface in IPv6 addresses
Part is ceased, therefore, a kind of possible implementation of corresponding relation of storage first interface information and first position information is：Directly
The corresponding relation of first interface information and first position information is stored, for example：Interface 0xD017C2FFFEA68A90：Positional information
0x9C38；Alternatively possible implementation is：The corresponding relation of IP address and first position information is stored, for example：IPV6
Location fe80::fdfd:1faa:1002:41a8：Positional information 0x9C38；In this regard, the present invention is not restricted.
Wherein, the corresponding relation of first interface information and first position information may have the keep-alive information table shown in Fig. 3
In, Fig. 3 is a kind of keep-alive that the car networking route addressing method embodiment one that geographical position of the present invention is combined with IP address is provided
The data format figure of information table, as shown in figure 3, every list item of keep-alive information table is believed comprising OBU positional informations and OBU interfaces
Breath；Alternatively, port numbers and timer can also be included.
The process of setting up of the keep-alive information table any bar list item is：The OBU positional informations store the first position letter of the OBU
Breath, the port numbers are taken from the second data division, and the OBU interface messages store the first interface information of the OBU, and the timer is set
Put a update cycle initial value.
Step 103, RSU obtain first data division.
Wherein, a kind of possible implementation of the first data division of RSU acquisitions is：
First packet header that the RSU can be removed in the first request data package obtains first data division.
Step 104, RSU send first data division to server.
Wherein, in second packet header that first data division is included, the IP address of the OBU as source IP address,
The IP address of the server is used as purpose IP address.
Step 105, RSU receive the second packet of OBU transmissions.
Wherein, second place information and second interface information are included in second packet.
Second packet is used for the positional information that RSU updates the OBU, without being forwarded to server.
Wherein, in the second packet can also comprising the first kind mark, the first kind identify for indicate this second
Type of data packet is position keep-alive packet.Specifically, first kind mark can be particular value, such as：0x0707.RSU
According to the corresponding first position information of the second place information updating of position keep-alive packet RSU storages.In addition, the RSU
The position keep-alive packet, the positional information for updating OBU, it is not necessary to clothes can be identified by first kind mark
Business device forwards the packet.A kind of possible implementation of second packet is as shown in Figure 5.Fig. 5 is geographical position of the present invention
The data format figure for another second packet that the car networking route addressing method embodiment one combined with IP address is provided.
If step 106, the second interface information are identical with the first interface information, the RSU is according to the second place
The first position information of OBU described in information updating.
Specifically, this step is pair of the first interface information and first position information stored based on step 102
It should be related to or the keep-alive information table, carry out the second interface information and compared with the first interface information with the first position information more
New.
For example, the maintenance process of the keep-alive information table any bar list item is：If the second interface information and the keep-alive
The first interface information of a certain bar list item record of information table is identical, then according to the second place information updating list item record
OBU positional informations, and reset the timer value of the list item；Deleted if the timer value is not reset in certain list item certain time
The list item, for example, the timer value of certain list item is arranged to 20 seconds, if not resetting the timer value in 20 seconds, this is determined
When device correspondence list item be deleted.
Specifically, because OBU has the characteristics of persistently moving mostly, so step 105 can be with default week with step 106
Phase repeats, and repeatedly updates the first position information of the OBU, so enable the RSU upgrade in time OBU position letter
Breath.
Step 107, RSU receive the first response data packet of server transmission.
Wherein, the IP address and port numbers of the OBU is included in the first response data packet.Step 108, the RSU obtain the OBU
IP address in interface message.
Step 109, the RSU obtain corresponding with the interface message identical first interface information the according to the interface message
One positional information.
Specifically, the RSU is the correspondence of the first interface information and first position information stored according to step 102
Relation searches first position information corresponding with the interface message identical first interface information.
Step 110, the RSU determine next-hop OBU according to the first position information and the vehicle neighbor table of the RSU.
Specifically, other communication apparatus node attributes in the vehicle neighbor table minute book communication apparatus node institute coverage
Information, for example, the contents such as MAC Address, the positional information of other communication apparatus nodes can be recorded.Each list item correspondence
A neighbours OBU or neighbours RSU in this communication apparatus node institute coverage.For example, the RSU can be in vehicle neighbours
Search and recorded with the nearest list item of the first position information distance in table, the list item records corresponding neighbours OBU as next-hop
OBU。
Optionally, the RSU can also obtain the target MAC (Media Access Control) address or first response data in first response data packet
Interface message corresponding with MAC Address in bag purpose IPv6 addresses, is searched and purpose MAC in the vehicle neighbor table of the RSU
Address or the corresponding neighbor entry of interface message, find, and first response data packet directly is issued into the neighbours, complete transmission.
Step 111, the RSU send first response data packet to next-hop OBU.
Optionally, in data link layer there is corresponding first response frame in first response data packet, and the RSU will can be somebody's turn to do
Protocol class model in first response frame replaces with default particular value, for example：0x0709, to identify first response data packet
It can be received by next-hop OBU or forward process.
The present embodiment, the first request data package that board units OBU is sent is received by drive test unit R SU, RSU storages the
The first interface information and the corresponding relation of the first position information included in one request data package；RSU obtains first
The first data division in request data package；And send first data division to the server；RSU receives the OBU
Second place information and second interface information are included in the second packet sent, second packet；If described second connects
Message breath is identical with the first interface information, then the RSU is first of OBU according to the second place information updating
Confidence ceases；The RSU is received in the first response data packet that the server is sent, first response data packet comprising described
OBU IP address and port numbers；The RSU obtains the interface message in the IP address of the OBU；The RSU connects according to
Mouth acquisition of information first position information corresponding with the interface message identical first interface information；The RSU is according to described
The vehicle neighbor table of first position information and the RSU, determines next-hop OBU；The RSU sends institute to the next-hop OBU
State the first response data packet.Upgraded in time OBU positional information by the second packet, so that RSU sends first to OBU again
, can be according to the positional information for accurately knowing OBU, to enter walking along the street according to accurate OBU positional information during response data packet
By, so that, reduce the probability of routing failure.
Fig. 6 is the flow chart for the car networking route addressing method embodiment two that geographical position of the present invention is combined with IP address,
As shown in fig. 6, a kind of possible implementation of step 105 is：
Step 201, RSU receive the second packet that OBU is sent with predetermined period.
Wherein, second place information and second interface information are included in second packet.
The present embodiment, receives the second packet that OBU is sent with predetermined period by RSU, realizes RSU with predetermined period more
New OBU positional information record, the positional information record for solving the OBU in RSU does not upgrade in time and failed, and then causes height
The problem of routing error being likely to occur during the OBU the reception server response data packets of speed movement.
The car networking route addressing method embodiment three that geographical position of the present invention is combined with IP address, in figure Fig. 1 or Fig. 6 institutes
Show on the basis of embodiment, can also further include：
Step 202, RSU broadcast the IP address of the RSU, and the positional information of the RSU is included in the IP address.
Specifically, there is no sequencing relation between step 202 and other steps 101-111 and step 201.Citing comes
Say, Fig. 7 is a kind of RSU that the car networking route addressing method embodiment three that geographical position of the present invention is combined with IP address is provided
The data format figure of IPv6 addresses, as shown in fig. 7, the IPv6 addresses include global routing prefix, subnet ID and interface message, its
Middle subnet ID includes the positional information of the RSU.Specifically, the positional information of the RSU has determined when disposing the RSU, no
Change.
Fig. 8 is the flow chart for the car networking route addressing method example IV that geographical position of the present invention is combined with IP address,
As shown in figure 8, the method for the present embodiment can include：
Step 301, OBU send the first request data package to RSU.
Wherein, first request data package is included in the first packet header, the first data division, first packet header comprising described
OBU first position information and first interface information, the first data division includes the second packet header and the second data division, described the
IP address comprising the OBU and the IP address of server in two packet header, second data division include port numbers.
Optionally, the OBU can by global positioning system (Global Positioning System, hereinafter referred to as
GPS the first position information) is obtained, obtaining frequency can be consistent with GPS updating location information frequency.
Optionally, if first packet header is IPv6 packet header, as shown in fig. 7, the subnet ID in the IP address of the OBU can
With the positional information comprising the OBU.
Step 302, the OBU send the second packet to the RSU.
Wherein, second place information and second interface information are included in second packet.
Step 303, the OBU receive the first response data packet of RSU transmissions.
Optionally, if protocol class model is default specific in corresponding first response frame of first response data packet
Value, for example：0x0709, then the OBU judge interface message in the IP address of first response data packet whether with the OBU itself
Interface message is consistent, and upper strata processing is given by the valid data in first response data packet if consistent.
The present embodiment, by OBU to RSU the first request data packages sent and the second packet, realizes OBU through in RSU
Turn the request data package and response data packet between transmitting-receiving and server, and update to RSU the positional information of the OBU, solve because
The problem of RSU can not know the new positional informations of OBU and cause to be likely to occur routing error during the reception server response data packet.
Fig. 9 is the flow chart for the car networking route addressing method embodiment five that geographical position of the present invention is combined with IP address,
As shown in figure 9, the method for the present embodiment is on the basis of embodiment illustrated in fig. 8, for the OBU not in the RSU coverages
Situation further refined step 301, can specifically include：
Step 401, the OBU obtain the IP address of the RSU.
Specifically, the OBU default gateways of itself are exactly the IP address of the RSU, can be directly from the routing table of the OBU
Obtain.
Step 402, the OBU obtain next-hop OBU according to the IP address of the RSU and the vehicle neighbor table of the OBU.
For example, the OBU will can remember in the positional information for the RSU that included in the IP address and the vehicle neighbor table
The positional information of each neighbours of record is compared, and finds out the nearest neighbours of relative distance as next-hop OBU.
Step 403, the OBU send first request data package to next-hop OBU.
Specifically, because the OBU may be distant with the RSU, first request data package is needed by multiple next
Jump OBU forwardings and get to the RSU, performed so step 402 may be repeated several times with step 403.
Step 404, the OBU send the second packet to the RSU.
Step 405, the OBU receive the first response data packet of RSU transmissions.
Specifically, in the RSU uncovered areas, first response data packet that the OBU is received is also that may pass through several
Individual next-hop OBU forwardings.
Optionally, if protocol class model is default specific in corresponding first response frame of first response data packet
Value, for example：0x0709, then the OBU judge interface message in the IP address of first response data packet whether with the OBU itself
Interface message is consistent, the positional information if inconsistent in IP address of the OBU according to first response data packet and the OBU from
The positional information of each neighbours, selects the position recorded in the IP address of first response data packet in the vehicle neighbor table of body
Nearest neighbours are used as next-hop OBU.
The present embodiment, selects next-hop OBU to carry out the first request data package and the first response data packet by relative distance
The mode of forwarding, realize RSU without between overlay area OBU and server by being routed and complete apart from optimum way
The transmission of request data package and response data packet, solves to cause packet to turn because RSU directly can not communicate with source/destination OBU
The problem of hair is unable to reach optimal Route Selection.
The car networking route addressing method embodiment six that geographical position of the present invention is combined with IP address, embodiment six is in reality
Apply on the basis of the illustrated embodiment of example five, a kind of possible implementation of step 402 is to be selected down by neighbours' score value formula
One jumps OBU, and specific neighbours' score value formula is：
Wherein, DiFor the relative distance of i-th neighbour in the vehicle neighbor table of the OBU and the RSU, by i-th of neighbour
Positional information and the RSU IP address in the positional information calculation that includes produce, RSSIiFor the reception letter of i-th of neighbour
Number intensity indicates, ScoreiI-th of the neighbours' score value calculated for above-mentioned formula.
Specifically, neighbours' score value formula result of calculation highest ScoreiCorresponding neighbours are used as next-hop OBU.
The present embodiment, by neighbours' score value formula, realizes and selects next-hop OBU by score value, solve RSU uncovered areas
The problem of how OBU selects optimal next-hop OBU when forwarding the first request data package.
The car networking route addressing method embodiment seven that geographical position of the present invention is combined with IP address, in geographical position of the invention
Put on the basis of the car networking route addressing method embodiment six combined with IP address, can also include：
Step 501, the OBU receive the position for including the RSU in the RSU of RSU broadcast IP address, the IP address
Information.
Specifically, the RSU of RSU broadcast IP address is the car combined by correspondence geographical position of the present invention with IP address
The step 202 of networking route addressing method embodiment three is completed.
Step 502, the OBU are according to the updating location information of RSU OBU default gateway.
For example, the OBU may receive the IP address of the RSU of multiple RSU broadcast nearby, then the OBU needs solution
Each RSU included in the IP address for separating out the multiple RSU received positional information, according to each RSU positional information with being somebody's turn to do
OBU relative distance selects a nearest RSU, with the default gateway of the IP address of the RSU as the OBU.If specifically, should
OBU uses IPv6 addresses, can also be revised as the global routing prefix in the IPv6 addresses complete in the IP address with the RSU
Ball route prefix is identical.
The present embodiment, by calculating OBU and sending broadcast RSU relative distance, is realized with nearest RSU nets by default
Close, solve multiple RSU while the problem of how OBU default gateways select when covering.
The car networking route addressing method embodiment eight that geographical position of the present invention is combined with IP address, in geographical position of the invention
Put on the basis of the car networking route addressing method embodiment seven combined with IP address, can also include：
Step 601, the OBU forward the IP address of the RSU.Specifically, after step 501 IP address of the OBU to the RSU
Broadcast forwarding is carried out, and broadcast storm is prevented using reversely poisoning.
Optionally, the RSU IP address broadcast life cycle be 5 life spans (Time To Live, hereinafter referred to as
TTL), the IP address for limiting the RSU at most carries out 5 broadcast forwardings.
The present embodiment, the IP address for forwarding RSU is broadcasted by OBU, the expansion of RSU broadcasting areas is realized, solves RSU not
The problem of overlay area OBU default gateways can not update.
The car networking route addressing method embodiment nine that geographical position of the present invention is combined with IP address, in geographical position of the invention
Put on the basis of the car networking route addressing method embodiment seven combined with IP address, can also include：
It is MAC Address comprising the OBU in step 701, the OBU broadcast data link frames, the data link frame, described
OBU positional information and RSSI.
Specifically, the car networking route addressing method embodiment that step 701 is combined with geographical position of the present invention with IP address
Nine other steps do not have sequencing relation.The OBU can be with the periodic broadcast data link frame.Optionally, the Data-Link
Can be with containing type number in the frame of road, it is neighbours' declaration frame that such model, which is used to identify the data link frame, for example：0x0708.
Specifically, these information included in the data link frame can be recorded as the list item for vehicle neighbor table
And store.For example：Fig. 4 is that the car networking route addressing method embodiment one that geographical position of the present invention is combined with IP address is carried
Supply a kind of vehicle neighbor table data format figure, as shown in figure 4, every list item of vehicle neighbor table comprising neighbor MAC address,
Positional information, RSSI, timer.
Carried specifically, Figure 10 is the car networking route addressing method embodiment eight that geographical position of the present invention is combined with IP address
A kind of maintaining method flow chart of the vehicle neighbor table supplied, as shown in Figure 10, this method can include：
Step 801, OBU or RSU are received in the data link frame of neighbours OBU or neighbours RSU broadcast, the data link frame
The positional information and RSSI of MAC Address, the OBU or RSU comprising the described OBU or RSU.
Such model of step 802, the OBU or the RSU in the data link frame is filtrated to get neighbours' declaration frame, example
Such as such model：0x0708.
Step 803, the OBU or the RSU obtain the MAC Address of the OBU in neighbours declaration frame.
Step 804, judge the OBU MAC Address whether there is in the OBU or RSU vehicle neighbor table.
If the MAC Address of the OBU is present in the OBU or RSU vehicle neighbor table, performs and update list item mode
Step 805-806, if the MAC Address of the OBU is not present in the OBU or RSU vehicle neighbor table, performs addition table
Item mode step 807-808.
Step 805, the OBU or the RSU declare the corresponding table in the information updating vehicle neighbor table in frame with the neighbours
Item information.
Specifically, declaring the positional information in the updating location information correspondence list item in frame with the neighbours, declared with the neighbours
Accuse the RSSI in the RSSI renewal correspondence list items in frame.
Step 806, the timer value for resetting the list item.
Specifically, the update cycle value of the list item can be inserted to the timer value.
Step 807, the OBU or the RSU add a list item in the vehicle neighbor table and recorded in neighbours declaration frame
Information.
Specifically, declaring that the MAC Address of the OBU in frame inserts the neighbor MAC address of the list item with the neighbours, with the neighbour
The positional information for occupying the OBU in declaration frame inserts the positional information of the list item, declares that the RSSI in frame is inserted with the neighbours
The RSSI of the list item.
Step 808, the timer value that the list item is set.
Step 809, the OBU or the RSU judge whether the timer value of any list item in the vehicle neighbor table is 0, if 0
Then delete the list item.
Specifically, there is no sequencing relation between step 809 and other steps 801-808.
The present embodiment, broadcasts neighbours by OBU and declares frame, realize the maintenance of surrounding RSU and OBU vehicle neighbor table, solve
RSU and OBU in respective coverage can direct communication node detection problem.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
The related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, performs the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. the car networking route addressing method that a kind of geographical position is combined with internet protocol address, it is characterised in that including：
Drive test unit R SU receives the first request data package that board units OBU is sent, and first request data package includes first
The first position information and first interface information of the OBU, first are included in packet header, the first data division, first packet header
Data division includes IP address and server comprising the OBU in the second packet header and the second data division, second packet header
IP address, second data division include port numbers；
The RSU stores the corresponding relation of the first interface information and the first position information；
The RSU obtains first data division；
The RSU sends first data division to the server；
The RSU, which is received, includes second place information and second in the second packet that the OBU is sent, second packet
Interface message；
If the second interface information is identical with the first interface information, the RSU according to the second place information more
New OBU first position information；
The RSU, which is received, includes the OBU in the first response data packet that the server is sent, first response data packet
IP address and port numbers；
The RSU obtains the interface message in the IP address of the OBU；
The RSU obtains first position corresponding with the interface message identical first interface information according to the interface message
Information；
The RSU determines next-hop OBU according to the first position information and the vehicle neighbor table of the RSU；
The RSU sends first response data packet to the next-hop OBU.
2. according to the method described in claim 1, it is characterised in that also identified in second packet comprising the first kind,
The first kind is identified for indicating that second type of data packet is position keep-alive packet.
3. method according to claim 2, it is characterised in that the RSU receives the second packet that the OBU is sent,
Including：
The RSU receives the second packet that the OBU is sent with predetermined period.
4. method according to claim 3, it is characterised in that also include：
The RSU broadcasts the positional information for including the RSU in the IP address of the RSU, the IP address.
5. the car networking route addressing method that a kind of geographical position is combined with Internet protocol address, it is characterised in that including：
OBU sends the first request data package to RSU, and first request data package includes the first packet header, the first data division, institute
The first position information and first interface information that the OBU is included in the first packet header are stated, the first data division includes the second packet header
With the second data division, the IP address comprising the OBU and the IP address of server, second data in second packet header
Part includes port numbers；
The OBU sends to the RSU and second place information and second interface is included in the second packet, second packet
Information；
The OBU receives the first response data packet that the RSU is sent.
6. method according to claim 5, it is characterised in that the OBU sends the first request data package to RSU, including：
The OBU obtains the IP address of the RSU；
The OBU obtains next-hop OBU according to the IP address of the RSU and the vehicle neighbor table of the OBU；
The OBU sends first request data package to the next-hop OBU.
7. method according to claim 6, it is characterised in that the OBU is according to the IP address and the OBU of the RSU
Vehicle neighbor table, obtain next-hop OBU, including：
The OBU according toObtain each neighbours in the vehicle neighbor table
Corresponding score value；
It is the next-hop OBU to determine the maximum OBU of the score value；
Wherein, DiFor the relative distance of i-th neighbour in the vehicle neighbor table of the OBU and the RSU, by the position of i-th of neighbour
Confidence ceases the positional information calculation included in the IP address with the RSU and produced, RSSIiReception signal for i-th of neighbour is strong
Degree instruction, ScoreiThe corresponding score value of i-th of neighbour calculated for above-mentioned formula.
8. method according to claim 7, it is characterised in that also include：
The OBU, which receives the position comprising the RSU in the RSU of RSU broadcast IP address, the IP address, to be believed
Breath；
OBU OBU according to the updating location information of RSU default gateway.
9. method according to claim 8, it is characterised in that the OBU receives the RSU of RSU broadcast IP
After address, in addition to：
The OBU forwards the IP address of the RSU.
10. method according to claim 8, it is characterised in that also include：
MAC address comprising the OBU, institute in the OBU broadcast data links frame, the data link frame
State OBU positional information and received signal strength indicator RSSI.
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