CN105187529A - Internet of vehicles implementation method based on positioning information - Google Patents

Internet of vehicles implementation method based on positioning information Download PDF

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Publication number
CN105187529A
CN105187529A CN201510564381.0A CN201510564381A CN105187529A CN 105187529 A CN105187529 A CN 105187529A CN 201510564381 A CN201510564381 A CN 201510564381A CN 105187529 A CN105187529 A CN 105187529A
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data
node
vehicle
address
response message
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CN105187529B (en
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王晓喃
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Suzhou Qindiao Digital Technology Co.,Ltd.
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Changshu Institute of Technology
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12—Discovery or management of network topologies
    • 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
    • H04L45/741—Routing in networks with a plurality of addressing schemes, e.g. with both IPv4 and IPv6
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

The invention discloses an Internet of vehicles implementation method based on positioning information. The Internet of vehicles is composed of access routers, access nodes and vehicle nodes, wherein the Internet of vehicles is divided into more than one subnet according to geographical coordinates, the shape of each subnet is rectangular, an intersection point of two diagonal lines of each subnet shape is called the central point of the subnet, the geographic coordinates of the central point are (x, y), each subnet is identified by a horizontal coordinate interval [x-w, x+w] and a horizontal coordinate interval [y-l, y+l], w is the width of each subnet, and l is the length of each subnet. Through the implementation method provided by the invention, the Internet of vehicles can obtain network service provided by the internet, maintain the continuity of communication, shorten router delay, reduce data packet loss rate and improve service quality. The Internet of vehicles implementation method can be applied to the fields such as road condition monitoring and vehicle management, and has broad application prospect.

Description

A kind of networking of the car based on locating information implementation method
Technical field
The present invention relates to a kind of car networking implementation method, in particular a kind of networking of the car based on locating information implementation method.
Background technology
Car networking, as a kind of new vehicle communication network, can realize the multi-hop wireless communication between vehicle and vehicle, between vehicle and roadside infrastructure.Along with the development of car networking technology and continuing to bring out of various new opplication, in the urgent need to car networking can accessing Internet to meet the application demand of user's sharp increase.
Car networking, as a kind of mobile ad hoc network of specific type, has the features such as translational speed is fast, number of nodes is many, area coverage is large.The Internet (hereinafter referred to as IPv6 network) based on IPv6 has the advantages such as the abundant and autgmentability of mobility support, address resource is strong.Therefore, car networking access IPv6 network becomes the ideal solution meeting user's application demand.
Current researcher propose car networking by access based on IPv6 the Internet obtain network service pattern and define corresponding protocol stack, but due to car networking architecture and IPv6 network obstructed, existing cut-in method has some limitation.Therefore need the Realization Method of Communication proposing the networking of a kind of car, thus reduce data loss rate, improve service quality.
Summary of the invention
Goal of the invention: technical problem to be solved by this invention is for the deficiencies in the prior art, provides a kind of car based on locating information networking implementation method.
Technical scheme: the invention discloses a kind of car based on locating information networking implementation method, described car networking is made up of couple in router, access node and vehicle node, described car networking is divided into more than one subnet according to geographical coordinate, the area of each subnet is rectangle, two cornerwise intersection points of subnet area are called the central point of this subnet, its geographical coordinate is (x, y), each subnet is by abscissa zone [x-w, x+w], and ordinate interval identifies [y-l, y+l], w is the wide of subnet, and l is the length of subnet; The span of w is the span of 1km-10km, l is 1km-10km;
Each subnet comprises a couple in router and more than one access node, and all access nodes in a subnet are connected with the couple in router in same subnet, and each access node is positioned at the diverse location of subnet, and its geographical coordinate has uniqueness; Vehicle node has route and forwarding capability;
Each access node or couple in router are by a global I Pv6 address designation, the global I Pv6 address identifying a couple in router or access node is made up of four parts, Part I and Part II are the subnet abscissa of 32 bits and the subnet ordinate of 32 bits, and its value equals geographical abscissa and the ordinate of subnet Centroid; Part III and Part IV are the access node abscissa of 32 bits and the access node ordinate of 32 bits, and its value equals geographical abscissa and the ordinate of couple in router or access node;
Each vehicle node has a global I Pv6 address and a local I Pv6 address, and wherein global I Pv6 address is used for the route between subnet, and local I Pv6 address is used for the route in subnet; The global I Pv6 address of vehicle node is made up of four parts, and Part I and Part II are the access node abscissa of 32 bits and the access node ordinate of 32 bits, and its value equals the geographical abscissa of access node and geographical ordinate; Part III is the extension field of i bit, and its value is 0; Part IV is the vehicle ID of (64-i) bit, and this vehicle ID has global uniqueness; The span of i is [1,60];
The local I Pv6 address of vehicle node is made up of four parts, and Part I and Part II are the vehicle node abscissa of 32 bits and the vehicle node ordinate of 32 bits, and its value equals the geographical abscissa of vehicle node and geographical ordinate; Part III is the extension field of i bit, and its value is 0; Part IV is the vehicle ID of (64-i) bit, and this vehicle ID has global uniqueness; The span of i is [1,60];
The installation space of vehicle ID is [1,2 64-i-1]; When car networking is divided into K subnet, the vehicle ID installation space P so in kth subnet kas shown in formula (1), 1≤k≤K:
P k = &lsqb; ( k - 1 ) &CenterDot; 2 64 - i K + 1 , k &CenterDot; 2 64 - i K &rsqb; ; 1 &le; k < K &lsqb; ( k - 1 ) &CenterDot; 2 64 - i K + 1 , k &CenterDot; 2 64 - i K - 1 &rsqb; ; k = K Formula (1),
After vehicle node starts, the couple in router to place subnet sends address request; After couple in router receives address request, return an address response message to vehicle node, this address response message load is the vehicle ID of minimum unassigned, and the vehicle ID that then couple in router distributes to vehicle node is labeled as distribution state; After vehicle node receives address response message, preserve this vehicle ID;
A data ID defines a kind of data type; Such as data ID value be 1 data type be information of vehicle flowrate, data ID be 2 data type be air contamination information etc.;
Vehicle node obtains the data of certain geographical coordinate by data address, data address is made up of three parts, Part I and Part II are the access node abscissa of 32 bits and the access node ordinate of 32 bits, and its value equals the geographical abscissa of access node and geographical ordinate; Part III is data message territory, data message territory is made up of data abscissa, data ordinate and data ID set, wherein, the geographical position that data abscissa and data ordinate identification data produce, data ID set is the data ID set of the various data types relevant to this geographical position; Such as, by the vehicle flowrate and air contamination etc. in the geographical position of (x, y) coordinates logo.
By above-mentioned network architecture and address structure, vehicle node can obtain data from nearest access node, postpones and cost because this reducing data acquisition.If local network does not have data, so mobile node can obtain data from other telecommunication networks, therefore improves the success rate of data acquisition.
In the method for the invention, it is characterized in that, each access node and vehicle node safeguard a tables of data, and the list item of this tables of data comprises four territories: data ID territory, geographical coordinate territory, data field and life span territory.
In the method for the invention, after vehicle node starts, first obtain the geographical coordinate of access node in the car networking of place and the geographical abscissa zone of place subnet and geographical ordinate interval, such as, by downloading the mode of google map.
In the method for the invention, be positioned at subnet S1 at vehicle node V, be arranged in the current location of all access node access node AP1 and vehicle node V of subnet S1 nearest when; When vehicle node V creates and its current geographic position (x v, y v) relevant data time, perform following steps:
Step 101: start;
Step 102: vehicle node V creates global I Pv6 address and the local I Pv6 address of oneself of access node AP1, in global I Pv6 address, subnet abscissa and subnet ordinate are set to the geographical abscissa of the Centroid of subnet S1 and geographical ordinate, access node abscissa and access node ordinate are set to the geographical abscissa of access node AP1 and geographical ordinate, in local I Pv6 address, vehicle node abscissa and vehicle node ordinate are set to (x v, y v), vehicle ID is set to the vehicle ID of vehicle node V;
Step 103: vehicle node V sends data sharing message, and the source address of this data sharing message is the local I Pv6 address of oneself, and destination address is the global I Pv6 address of access node AP1, load be produce with geographical position (x v, y v) relevant data, the data ID of these data and life cycle;
Step 104: according to the geographical coordinate of access node AP1 in destination address, data sharing Message routing is to access node AP1, data sharing message through routed path in intermediate car node receive data sharing message after, a list item is created in tables of data, the data ID of this list item, data value and life cycle are set to the data ID in data sharing message respectively, data value and life cycle, the geographic coordinate values of this list item is set to vehicle node abscissa in data sharing message in destination address and vehicle node ordinate value, the i.e. geographical coordinate of vehicle node V,
Step 105: terminate.
By said process, vehicle node can produce and share data.Such vehicle node can obtain data from nearest mobile node or access node, postpones and cost because this reducing data acquisition.If local network does not have data, so mobile node can obtain data from other telecommunication networks, therefore improves the success rate of data acquisition.
In the method for the invention, be arranged in subnet S1 at vehicle node V, the couple in router of subnet S1 is that AR1, vehicle node V ask geographical position (x p, y p) data when;
If geographical position (x p, y p) be positioned at subnet S1, and in subnet S1 in all access nodes access node AP1 distance geographical position (x p, y p) recently, so vehicle node V performs following step and obtains geographical position (x p, y p) data:
Step 201: start;
Step 202: vehicle node V builds a data address and a local I Pv6 address, wherein, access node abscissa in data address and access node ordinate are set to geographical abscissa and the ordinate of access node AP1, and data abscissa and data ordinate are set to (x p, y p), data ID set is set to the data ID set of the various data that vehicle node V will obtain, in local I Pv6 address, vehicle abscissa and vehicle ordinate are set to geographical abscissa and the ordinate of the current position of vehicle node V, and vehicle ID is the vehicle ID of vehicle node V;
Step 203: vehicle node V sends data request information, and the destination address of this data request information is the data address built, and source address is the local I Pv6 address built;
Step 204: according to the access node abscissa in destination address and access node ordinate, data request information is forwarded to next-hop node;
Step 205: after next-hop node receives data request information, checks the data oneself whether saving vehicle node V request, if carry out step 206, otherwise carry out step 207;
Step 206: next-hop node returns a data response message to vehicle node V, the source address of data response message is the destination address of the data request information that next-hop node receives, destination address is the source address of the data request information that next-hop node receives, load is data and the life cycle of vehicle node V request, carry out step 210;
Step 207: next-hop node judges that whether oneself is access node AP1, if not then carry out step 208, otherwise carry out step 209:;
Step 208: next-hop node will receive data request information to be continued to be forwarded to next-hop node, performs step 205;
Step 209: access node AP1 obtains the data of vehicle node V request and returns a data response message to vehicle node V, the source address of data response message is the destination address of the data request information that access node AP1 receives, destination address is the source address of the data request information received, and load is data and the life cycle of vehicle node V request;
Step 210: the destination address asking message according to data response, final data response message arrives vehicle node V, data response message through routed path in intermediate car node and after vehicle node V receives data response message, preserve the data in data response message, namely in tables of data, a list item is increased for each data ID in the data ID set in source address in data response message, geographical coordinate is data abscissa in data response message in source address and data ordinate, data value respectively in the load of data response message of data value and life cycle and life cycle,
Step 211: terminate.
By said process, vehicle node can obtain data from nearest mobile node or access node, postpones and cost because this reducing data acquisition.
In the method for the invention, be arranged in subnet S1 at vehicle node V, the couple in router of subnet S1 is that AR1, vehicle node V ask geographical position (x p, y p) data when;
If geographical position (x p, y p) be positioned at subnet S1, and in subnet S1 in all access nodes access node AP1 distance geographical position (x p, y p) recently, in step 209, the data that access node AP1 asks according to following Procedure Acquisition vehicle node V:
Step 301: start;
Step 302: access node AP1 creates oneself global I Pv6 address, in global I Pv6 address, subnet abscissa and subnet ordinate are set to the geographical abscissa of the Centroid of subnet S1 and geographical ordinate, and access node abscissa and access node ordinate are set to the geographical abscissa of access node AP1 and geographical ordinate;
Step 303: the source address in the data request information received is updated to the global I Pv6 address of oneself by access node AP1, and sends this data request information;
Step 304: according to data abscissa in destination address and data ordinate (x p, y p), data request information is forwarded to next-hop node;
Step 305: after next-hop node receives data request information, checks the data oneself whether saving vehicle node V request, if carry out step 306, otherwise carry out step 307;
Step 306: next-hop node returns a data response message to access node AP1, the source address of data response message is the destination address of the data request information that next-hop node receives, destination address is the source address of the data request information that next-hop node receives, load is data and the life cycle of vehicle node V request, carry out step 310;
Step 307: next-hop node judges whether the geographical position coordinates of oneself is (x p, y p), if not then carry out step 308, otherwise carry out step 309;
Step 308: next-hop node will receive data request information to be continued to be forwarded to next-hop node, performs step 305;
Step 309: geographical position coordinates is (x p, y p) vehicle node produce vehicle node V request data, return a data response message simultaneously, the source address of data response message is the destination address of the data request information received, destination address is the source address of the data request information received, and load is data and the life cycle of vehicle node V request;
Step 310: the destination address asking message according to data response, final data response message arrives access node AP1, data response message through routed path in intermediate car node and after access node AP1 receives data response message, preserve the data in data response message, namely in tables of data, a list item is increased for each data segment ID in the data ID set in source address in data response message, geographical coordinate is data abscissa in data response message in source address and data ordinate, data value and life cycle respectively data are want by the data value in Message Payload and life cycle,
Step 311: terminate.
If local network does not have data, so access node can address position be (x by said process p, y p) vehicle node P produce data, therefore improve the success rate of data acquisition.
In the method for the invention, be arranged in subnet S1 at vehicle node V, the couple in router of subnet S1 is that AR1, vehicle node V ask geographical position (x p, y p) data when;
If geographical position (x p, y p) being positioned at subnet S2, the couple in router of subnet S2 is AR2, access node AP2 distance geographical position (x in all access nodes in subnet S2 p, y p) recently, in subnet S1, in all access nodes, access node AP1 distance vehicle node V is nearest, and so vehicle node V performs following step and obtains geographical position (x p, y p) data:
Step 401: start;
Step 402: vehicle node V builds a data address and a local I Pv6 address, wherein, access node abscissa in data address and access node ordinate are set to geographical abscissa and the ordinate of access node AP2, and data abscissa and data ordinate are set to (x p, y p), data ID set is set to the data ID set of all data that vehicle node V will obtain, in local I Pv6 address, vehicle abscissa and vehicle ordinate are set to geographical abscissa and the ordinate of the current position of vehicle node V, and vehicle ID is the vehicle ID of vehicle node V;
Step 403: vehicle node V sends data request information, and the destination address of this data request information is the data address built, and source address is the local I Pv6 address built;
Step 404: according to the access node abscissa in destination address and access node ordinate, the i.e. geographical position of access node AP2, be positioned at subnet S2 according to access node AP2, is forwarded to the next-hop node that distance access node AP1 is nearest by data request information;
Step 405: after next-hop node receives data request information, checks the data oneself whether saving vehicle node V request, if carry out step 406, otherwise carry out step 407;
Step 406: next-hop node returns a data response message to vehicle node V, the source address of data response message is the destination address of the data request information that next-hop node receives, destination address is the source address of the data request information that next-hop node receives, load is data and the life cycle of vehicle node V request, carry out step 414;
Step 407: next-hop node judges that whether oneself is access node AP1, if not then carry out step 408, otherwise carry out step 409:;
Step 408: next-hop node continues to be forwarded to the nearest next-hop node of distance access node AP1 by receiving data request information, performs step 405;
Step 409: access node AP1 builds the global I Pv6 address of vehicle node V, wherein, the access node abscissa of global I Pv6 address and access node ordinate are the geographical abscissa of access node AP1 and geographical ordinate, vehicle ID is set to the vehicle ID of vehicle node V, then the source address of data request information is updated to the global I Pv6 address of vehicle node V, and this data request information is sent to couple in router AR1;
Step 410: the data request information received is transmitted to couple in router AR2 by couple in router AR1, the data request information received is transmitted to access node AP2 by couple in router AR2;
Step 411: the data whether access node AP2 has vehicle node V to ask, if had, carry out step 413, otherwise carry out step 412;
Step 412: access node AP2 obtains the data of vehicle node V request;
Step 413: access node AP2 returns a data response message to vehicle node V, the source address of data response message is the destination address of the data request information that access node AP2 receives, destination address is the source address of the data request information received, load is data and the life cycle of vehicle node V request, data response message is sent to couple in router AR2, data response message is transmitted to couple in router AR1 according to the destination address of data response message by couple in router AR2, data response message is transmitted to access node AP1 according to the destination address of data response message by couple in router AR1, after access node AP1 receives data response message, destination address in data response message is updated to the local I Pv6 address of vehicle node V, then this data response message is sent, access node AP1 preserves the data in data response message simultaneously,
Step 414: according to the destination address of data response message, data response message finally arrives vehicle node V, data response message through routed path in intermediate car node and after vehicle node V receives data response message, preserve the data in data response message, namely in tables of data, a list item is increased for each data ID in the data ID set in source address in data response message, geographical coordinate is data abscissa in data response message in source address and data ordinate, data value respectively in the load of data response message of data value and life cycle and life cycle,
Step 415: terminate;
By said process, vehicle node can obtain data from nearest mobile node or access node, postpones and cost because this reducing data acquisition;
In step 412, the access node AP2 data of asking according to following Procedure Acquisition vehicle node V:
Step 501: start;
Step 502: access node AP2 creates oneself global I Pv6 address, in global I Pv6 address, subnet abscissa and subnet ordinate are set to the geographical abscissa of the Centroid of subnet S2 and geographical ordinate, and access node abscissa and access node ordinate are set to the geographical abscissa of access node AP2 and geographical ordinate;
Step 503: the source address in the data request information received is updated to the global I Pv6 address of oneself by access node AP2, and sends this data request information;
Step 504: according to data abscissa in destination address and data ordinate (x p, y p), data request information is forwarded to next-hop node;
Step 505: after next-hop node receives data request information, checks the data oneself whether saving vehicle node V request, if carry out step 506, otherwise carry out step 507;
Step 506: next-hop node returns a data response message to access node AP2, the source address of data response message is the destination address of the data request information that next-hop node receives, destination address is the source address of the data request information that next-hop node receives, load is data and the life cycle of vehicle node V request, carry out step 510;
Step 507: next-hop node judges whether the geographical position coordinates of oneself is (x p, y p), if not then carry out step 508, otherwise carry out step 509;
Step 508: next-hop node will receive data request information to be continued to be forwarded to next-hop node, performs step 505;
Step 509: geographical position coordinates is (x p, y p) vehicle node produce vehicle node V request data, return a data response message simultaneously, the source address of data response message is the destination address of the data request information received, destination address is the source address of the data request information received, and load is data and the life cycle of vehicle node V request;
Step 510: the destination address asking message according to data response, final data response message arrives access node AP1, data response message through routed path in intermediate car node and after access node AP1 receives data response message, preserve the data in data response message, namely in tables of data, a list item is increased for each data segment ID in the data ID set in source address in data response message, geographical coordinate is data abscissa in data response message in source address and data ordinate, data value and life cycle respectively data are want by the data value in Message Payload and life cycle,
Step 511: terminate.
If network does not have data, so access node can obtain from remote subnetwork or produce data, therefore improves the success rate of data acquisition.
In the method for the invention, vehicle node V is by vehicle ID unique identification, if multiple vehicle node receives data response message, so only preserve vehicle node out this message that the vehicle ID in destination address identifies, other nodes abandon this message.
In the method for the invention, in step 413, after access node AP1 receives data response message, preserve the data in data response message, namely in tables of data, a list item is increased for each data ID in the data ID set in source address in data response message, geographical coordinate is data abscissa in data response message in source address and data ordinate, data value respectively in the load of data response message of data value and life cycle and life cycle.
In the method for the invention, the vehicle ID of vehicle node remains unchanged in life cycle, by vehicle ID unique identification in whole life cycle.
Because vehicle ID remains unchanged in life cycle, because this reducing because the communication failure brought is changed in address, thus improve data acquisition success rate.。
Beneficial effect: the invention provides a kind of car based on locating information networking implementation method, the networking of described car can obtain by implementation method provided by the present invention the network service that network provides, keep the continuity communicated simultaneously, shorten routing delay, reduce bursts dropping ratio, improve service quality, the present invention can be applicable to the fields such as road conditions monitoring, vehicle management, is with a wide range of applications.
Accompanying drawing explanation
To do the present invention below in conjunction with the drawings and specific embodiments and further illustrate, above-mentioned and/or otherwise advantage of the present invention will become apparent.
Fig. 1 is car INVENTIONNetworking architectures schematic diagram of the present invention.
Fig. 2 is the global I Pv6 address structure schematic diagram of access node of the present invention or access route.
Fig. 3 is the global I Pv6 address structure schematic diagram of vehicle node of the present invention.
Fig. 4 is the local I Pv6 address structure schematic diagram of vehicle node of the present invention.
Fig. 5 is data address structural representation of the present invention.
Fig. 6 is that data of the present invention produce schematic flow sheet.
Fig. 7 is that local data of the present invention obtains schematic flow sheet.
Fig. 8 is that local data of the present invention produces schematic flow sheet.
Fig. 9 is Remote data service schematic flow sheet of the present invention.
Figure 10 is that teledata of the present invention produces schematic flow sheet.
Embodiment:
The invention provides a kind of car based on locating information networking implementation method, the networking of described car can obtain by implementation method provided by the present invention the network service that network provides, keep the continuity communicated simultaneously, shorten routing delay, reduce bursts dropping ratio, improve service quality, the present invention can be applicable to the fields such as road conditions monitoring, vehicle management, is with a wide range of applications.
Fig. 1 is car INVENTIONNetworking architectures schematic diagram of the present invention.Described car networking is made up of couple in router 1, access node 2 and vehicle node 3, described car networking is divided into more than one subnet 4 according to geographical coordinate, and the area of each subnet 4 is rectangle, and two cornerwise intersection points of subnet area are called the central point 5 of this subnet, its geographical coordinate is (x, y), each subnet 4 is by abscissa zone [x-w, x+w], [y-l is identified with ordinate interval, y+l], w is the wide of subnet 4, and l is the length of subnet 4; The span of w is the span of 1km-10km, l is 1km-10km.
Each subnet 4 comprises more than a couple in router 1 and one access node 2, all access nodes 2 in a subnet 4 are connected with the couple in router 1 in same subnet 4, each access node 2 is positioned at the diverse location of subnet 4, and its geographical coordinate has uniqueness; Vehicle node 3 has route and forwarding capability.
Fig. 2 is the global I Pv6 address structure schematic diagram of access node of the present invention or access route.Each access node or couple in router are by a global I Pv6 address designation, the global I Pv6 address identifying a couple in router or access node is made up of four parts, Part I and Part II are the subnet abscissa of 32 bits and the subnet ordinate of 32 bits, and its value equals geographical abscissa and the ordinate of subnet Centroid; Part III and Part IV are the access node abscissa of 32 bits and the access node ordinate of 32 bits, and its value equals geographical abscissa and the ordinate of couple in router or access node.
Fig. 3 is the global I Pv6 address structure schematic diagram of vehicle node of the present invention.Each vehicle node has a global I Pv6 address and a local I Pv6 address, and wherein global I Pv6 address is used for the route between subnet, and local I Pv6 address is used for the route in subnet; The global I Pv6 address of vehicle node is made up of four parts, and Part I and Part II are the access node abscissa of 32 bits and the access node ordinate of 32 bits, and its value equals the geographical abscissa of access node and geographical ordinate; Part III is the extension field of i bit, and its value is 0; Part IV is the vehicle ID of (64-i) bit, and this vehicle ID has global uniqueness; The span of i is [1,60].
Fig. 4 is the local I Pv6 address structure schematic diagram of vehicle node of the present invention.The local I Pv6 address of vehicle node is made up of four parts, and Part I and Part II are the vehicle node abscissa of 32 bits and the vehicle node ordinate of 32 bits, and its value equals the geographical abscissa of vehicle node and geographical ordinate; Part III is the extension field of i bit, and its value is 0; Part IV is the vehicle ID of (64-i) bit, and this vehicle ID has global uniqueness; The span of i is [1,60].
The installation space of vehicle ID is [1,2 64-i-1]; When car networking is divided into K subnet, the vehicle ID installation space P so in kth subnet kas shown in formula (1), 1≤k≤K:
P k = &lsqb; ( k - 1 ) &CenterDot; 2 64 - i &CenterDot; K + 1 , k &CenterDot; 2 64 - i K &rsqb; ; 1 &le; k < K &lsqb; ( k - 1 ) &CenterDot; 2 64 - i K + 1 , k &CenterDot; 2 64 - i K - 1 &rsqb; ; k = K Formula (1),
After vehicle node starts, the couple in router to place subnet sends address request; After couple in router receives address request, return an address response message to vehicle node, this address response message load is the vehicle ID of minimum unassigned, and the vehicle ID that then couple in router distributes to vehicle node is labeled as distribution state; After vehicle node receives address response message, preserve this vehicle ID.
Fig. 5 is data address structural representation of the present invention.A data ID defines a kind of data type; Such as data ID value be 1 data type be information of vehicle flowrate, data ID be 2 data type be air contamination information etc.;
Vehicle node obtains the data of certain geographical coordinate by data address, data address is made up of three parts, Part I and Part II are the access node abscissa of 32 bits and the access node ordinate of 32 bits, and its value equals the geographical abscissa of access node and geographical ordinate; Part III is the data message territory of 64 bits, data message territory is made up of data abscissa, data ordinate and data ID set, wherein, the geographical position that data abscissa and data ordinate identification data produce, data ID set is the data ID set of the various data types relevant to this geographical position; Such as, by the vehicle flowrate and air contamination etc. in the geographical position of (x, y) coordinates logo.
By above-mentioned network architecture and address structure, vehicle node can obtain data from nearest access node, postpones and cost because this reducing data acquisition.If local network does not have data, so mobile node can obtain data from other telecommunication networks, therefore improves the success rate of data acquisition.
Fig. 6 is that data of the present invention produce schematic flow sheet.Each access node and vehicle node safeguard a tables of data, and the list item of this tables of data comprises four territories: data ID territory, geographical coordinate territory, data field and life span territory.
In the method for the invention, after vehicle node starts, first obtain the geographical coordinate of access node in the car networking of place and the geographical abscissa zone of place subnet and geographical ordinate interval, such as, by downloading the mode of google map.
In the method for the invention, be positioned at subnet S1 at vehicle node V, be arranged in the current location of all access node access node AP1 and vehicle node V of subnet S1 nearest when; When vehicle node V creates and its current geographic position (x v, y v) relevant data time, perform following steps:
Step 101: start;
Step 102: vehicle node V creates global I Pv6 address and the local I Pv6 address of oneself of access node AP1, in global I Pv6 address, subnet abscissa and subnet ordinate are set to the geographical abscissa of the Centroid of subnet S1 and geographical ordinate, access node abscissa and access node ordinate are set to the geographical abscissa of access node AP1 and geographical ordinate, in local I Pv6 address, vehicle node abscissa and vehicle node ordinate are set to (x v, y v), vehicle ID is set to the vehicle ID of vehicle node V;
Step 103: vehicle node V sends data sharing message, and the source address of this data sharing message is the local I Pv6 address of oneself, and destination address is the global I Pv6 address of access node AP1, load be produce with geographical position (x v, y v) relevant data, the data ID of these data and life cycle;
Step 104: according to the geographical coordinate of access node AP1 in destination address, data sharing Message routing is to access node AP1, data sharing message through routed path in intermediate car node receive data sharing message after, a list item is created in tables of data, the data ID of this list item, data value and life cycle are set to the data ID in data sharing message respectively, data value and life cycle, the geographic coordinate values of this list item is set to vehicle node abscissa in data sharing message in destination address and vehicle node ordinate value, the i.e. geographical coordinate of vehicle node V,
Step 105: terminate.
By said process, vehicle node can produce and share data.Such vehicle node can obtain data from nearest mobile node or access node, postpones and cost because this reducing data acquisition.If local network does not have data, so mobile node can obtain data from other telecommunication networks, therefore improves the success rate of data acquisition.
Fig. 7 is that local data of the present invention obtains schematic flow sheet.Be arranged in subnet S1 at vehicle node V, the couple in router of subnet S1 is that AR1, vehicle node V ask geographical position (x p, y p) data when;
If geographical position (x p, y p) be positioned at subnet S1, and in subnet S1 in all access nodes access node AP1 distance geographical position (x p, y p) recently, so vehicle node V performs following step and obtains geographical position (x p, y p) data:
Step 201: start;
Step 202: vehicle node V builds a data address and a local I Pv6 address, wherein, access node abscissa in data address and access node ordinate are set to geographical abscissa and the ordinate of access node AP1, and data abscissa and data ordinate are set to (x p, y p), data ID set is set to the data ID set of the various data that vehicle node V will obtain, in local I Pv6 address, vehicle abscissa and vehicle ordinate are set to geographical abscissa and the ordinate of the current position of vehicle node V, and vehicle ID is the vehicle ID of vehicle node V;
Step 203: vehicle node V sends data request information, and the destination address of this data request information is the data address built, and source address is the local I Pv6 address built;
Step 204: according to the access node abscissa in destination address and access node ordinate, data request information is forwarded to next-hop node;
Step 205: after next-hop node receives data request information, checks the data oneself whether saving vehicle node V request, if carry out step 206, otherwise carry out step 207;
Step 206: next-hop node returns a data response message to vehicle node V, the source address of data response message is the destination address of the data request information that next-hop node receives, destination address is the source address of the data request information that next-hop node receives, load is data and the life cycle of vehicle node V request, carry out step 210;
Step 207: next-hop node judges that whether oneself is access node AP1, if not then carry out step 208, otherwise carry out step 209;
Step 208: next-hop node will receive data request information to be continued to be forwarded to next-hop node, performs step 205;
Step 209: access node AP1 obtains the data of vehicle node V request and returns a data response message to vehicle node V, the source address of data response message is the destination address of the data request information that access node AP1 receives, destination address is the source address of the data request information received, and load is data and the life cycle of vehicle node V request;
Step 210: the destination address asking message according to data response, final data response message arrives vehicle node V, data response message through routed path in intermediate car node and after vehicle node V receives data response message, preserve the data in data response message, namely in tables of data, a list item is increased for each data ID in the data ID set in source address in data response message, geographical coordinate is data abscissa in data response message in source address and data ordinate, data value respectively in the load of data response message of data value and life cycle and life cycle,
Step 211: terminate.
By said process, vehicle node can obtain data from nearest mobile node or access node, postpones and cost because this reducing data acquisition.
Fig. 8 is that local data of the present invention produces schematic flow sheet.Be arranged in subnet S1 at vehicle node V, the couple in router of subnet S1 is that AR1, vehicle node V ask geographical position (x p, y p) data when;
If geographical position (x p, y p) be positioned at subnet S1, and in subnet S1 in all access nodes access node AP1 distance geographical position (x p, y p) recently, in step 209, the data that access node AP1 asks according to following Procedure Acquisition vehicle node V:
Step 301: start;
Step 302: access node AP1 creates oneself global I Pv6 address, in global I Pv6 address, subnet abscissa and subnet ordinate are set to the geographical abscissa of the Centroid of subnet S1 and geographical ordinate, and access node abscissa and access node ordinate are set to the geographical abscissa of access node AP1 and geographical ordinate;
Step 303: the source address in the data request information received is updated to the global I Pv6 address of oneself by access node AP1, and sends this data request information;
Step 304: according to data abscissa in destination address and data ordinate (x p, y p), data request information is forwarded to next-hop node;
Step 305: after next-hop node receives data request information, checks the data oneself whether saving vehicle node V request, if carry out step 306, otherwise carry out step 307;
Step 306: next-hop node returns a data response message to access node AP1, the source address of data response message is the destination address of the data request information that next-hop node receives, destination address is the source address of the data request information that next-hop node receives, load is data and the life cycle of vehicle node V request, carry out step 310;
Step 307: next-hop node judges whether the geographical position coordinates of oneself is (x p, y p), if not then carry out step 308, otherwise carry out step 309;
Step 308: next-hop node will receive data request information to be continued to be forwarded to next-hop node, performs step 305;
Step 309: geographical position coordinates is (x p, y p) vehicle node produce vehicle node V request data, return a data response message simultaneously, the source address of data response message is the destination address of the data request information received, destination address is the source address of the data request information received, and load is data and the life cycle of vehicle node V request;
Step 310: the destination address asking message according to data response, final data response message arrives access node AP1, data response message through routed path in intermediate car node and after access node AP1 receives data response message, preserve the data in data response message, namely in tables of data, a list item is increased for each data segment ID in the data ID set in source address in data response message, geographical coordinate is data abscissa in data response message in source address and data ordinate, data value and life cycle respectively data are want by the data value in Message Payload and life cycle,
Step 311: terminate.
If local network does not have data, so access node can address position be (x by said process p, y p) vehicle node P produce data, therefore improve the success rate of data acquisition.
Fig. 9 is Remote data service schematic flow sheet of the present invention.Be arranged in subnet S1 at vehicle node V, the couple in router of subnet S1 is that AR1, vehicle node V ask geographical position (x p, y p) data when;
If geographical position (x p, y p) being positioned at subnet S2, the couple in router of subnet S2 is AR2, access node AP2 distance geographical position (x in all access nodes in subnet S2 p, y p) recently, in subnet S1, in all access nodes, access node AP1 distance vehicle node V is nearest, and so vehicle node V performs following step and obtains geographical position (x p, y p) data:
Step 401: start;
Step 402: vehicle node V builds a data address and a local I Pv6 address, wherein, access node abscissa in data address and access node ordinate are set to geographical abscissa and the ordinate of access node AP2, and data abscissa and data ordinate are set to (x p, y p), data ID set is set to the data ID set of all data that vehicle node V will obtain, in local I Pv6 address, vehicle abscissa and vehicle ordinate are set to geographical abscissa and the ordinate of the current position of vehicle node V, and vehicle ID is the vehicle ID of vehicle node V;
Step 403: vehicle node V sends data request information, and the destination address of this data request information is the data address built, and source address is the local I Pv6 address built;
Step 404: according to the access node abscissa in destination address and access node ordinate, the i.e. geographical position of access node AP2, be positioned at subnet S2 according to access node AP2, is forwarded to the next-hop node that distance access node AP1 is nearest by data request information;
Step 405: after next-hop node receives data request information, checks the data oneself whether saving vehicle node V request, if carry out step 406, otherwise carry out step 407;
Step 406: next-hop node returns a data response message to vehicle node V, the source address of data response message is the destination address of the data request information that next-hop node receives, destination address is the source address of the data request information that next-hop node receives, load is data and the life cycle of vehicle node V request, carry out step 414;
Step 407: next-hop node judges that whether oneself is access node AP1, if not then carry out step 408, otherwise carry out step 409;
Step 408: next-hop node continues to be forwarded to the nearest next-hop node of distance access node AP1 by receiving data request information, performs step 405;
Step 409: access node AP1 builds the global I Pv6 address of vehicle node V, wherein, the access node abscissa of global I Pv6 address and access node ordinate are the geographical abscissa of access node AP1 and geographical ordinate, vehicle ID is set to the vehicle ID of vehicle node V, then the source address of data request information is updated to the global I Pv6 address of vehicle node V, and this data request information is sent to couple in router AR1;
Step 410: the data request information received is transmitted to couple in router AR2 by couple in router AR1, the data request information received is transmitted to access node AP2 by couple in router AR2;
Step 411: the data whether access node AP2 has vehicle node V to ask, if so, carry out step 413, otherwise carry out step 412;
Step 412: access node AP2 obtains the data of vehicle node V request;
Step 413: access node AP2 returns a data response message to vehicle node V, the source address of data response message is the destination address of the data request information that access node AP2 receives, destination address is the source address of the data request information received, load is data and the life cycle of vehicle node V request, data response message is sent to couple in router AR2, data response message is transmitted to couple in router AR1 according to the destination address of data response message by couple in router AR2, data response message is transmitted to access node AP1 according to the destination address of data response message by couple in router AR1, after access node AP1 receives data response message, destination address in data response message is updated to the local I Pv6 address of vehicle node V, then this data response message is sent, access node AP1 preserves the data in data response message simultaneously,
Step 414: according to the destination address of data response message, data response message finally arrives vehicle node V, data response message through routed path in intermediate car node and after vehicle node V receives data response message, preserve the data in data response message, namely in tables of data, a list item is increased for each data ID in the data ID set in source address in data response message, geographical coordinate is data abscissa in data response message in source address and data ordinate, data value respectively in the load of data response message of data value and life cycle and life cycle,
Step 415: terminate;
By said process, vehicle node can obtain data from nearest mobile node or access node, postpones and cost because this reducing data acquisition.
Figure 10 is that teledata of the present invention produces schematic flow sheet.In step 412, the access node AP2 data of asking according to following Procedure Acquisition vehicle node V:
Step 501: start;
Step 502: access node AP2 creates oneself global I Pv6 address, in global I Pv6 address, subnet abscissa and subnet ordinate are set to the geographical abscissa of the Centroid of subnet S2 and geographical ordinate, and access node abscissa and access node ordinate are set to the geographical abscissa of access node AP2 and geographical ordinate;
Step 503: the source address in the data request information received is updated to the global I Pv6 address of oneself by access node AP2, and sends this data request information;
Step 504: according to data abscissa in destination address and data ordinate (x p, y p), data request information is forwarded to next-hop node;
Step 505: after next-hop node receives data request information, checks the data oneself whether saving vehicle node V request, if carry out step 506, otherwise carry out step 507;
Step 506: next-hop node returns a data response message to access node AP2, the source address of data response message is the destination address of the data request information that next-hop node receives, destination address is the source address of the data request information that next-hop node receives, load is data and the life cycle of vehicle node V request, carry out step 510;
Step 507: next-hop node judges whether the geographical position coordinates of oneself is (x p, y p), if not then carry out step 508, otherwise carry out step 509;
Step 508: next-hop node will receive data request information to be continued to be forwarded to next-hop node, performs step 505;
Step 509: geographical position coordinates is (x p, y p) vehicle node produce vehicle node V request data, return a data response message simultaneously, the source address of data response message is the destination address of the data request information received, destination address is the source address of the data request information received, and load is data and the life cycle of vehicle node V request;
Step 510: the destination address asking message according to data response, final data response message arrives access node AP1, data response message through routed path in intermediate car node and after access node AP1 receives data response message, preserve the data in data response message, namely in tables of data, a list item is increased for each data segment ID in the data ID set in source address in data response message, geographical coordinate is data abscissa in data response message in source address and data ordinate, data value and life cycle respectively data are want by the data value in Message Payload and life cycle,
Step 511: terminate.
If network does not have data, so access node can obtain from remote subnetwork or produce data, therefore improves the success rate of data acquisition.
Vehicle node V is by vehicle ID unique identification, if multiple vehicle node receives data response message, so only preserve vehicle node out this message that the vehicle ID in destination address identifies, other nodes abandon this message.
In step 413, after access node AP1 receives data response message, preserve the data in data response message, namely in tables of data, a list item is increased for each data ID in the data ID set in source address in data response message, geographical coordinate is data abscissa in data response message in source address and data ordinate, data value respectively in the load of data response message of data value and life cycle and life cycle.
The vehicle ID of vehicle node remains unchanged in life cycle, by vehicle ID unique identification in whole life cycle.
Because vehicle ID remains unchanged in life cycle, because this reducing because the communication failure brought is changed in address, thus improve data acquisition success rate.。
Embodiment 1
Based on the simulation parameter of table 1, the present embodiment simulates the car networking implementation method in the present invention, performance evaluation is as follows: along with the increase of vehicle node speed, data acquisition postpones and cost reduces all thereupon, main cause is when vehicle node speed increases, vehicle node distribution area increases, and therefore vehicle node can obtain data from nearest vehicle node.When vehicle node speed is 10m/s, the route length obtaining data is 3 jumpings, postpones for 60ms.
Table 1 simulation parameter
The invention provides a kind of thinking of implementation method of car networking of future generation; the method and access of this technical scheme of specific implementation is a lot; the above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.The all available prior art of each component part not clear and definite in the present embodiment is realized.

Claims (10)

1. the networking of the car based on a locating information implementation method, it is characterized in that, described car networking is made up of couple in router, access node and vehicle node, described car networking is divided into more than one subnet according to geographical coordinate, the area of each subnet is rectangle, two cornerwise intersection points of subnet area are called the central point of this subnet, its geographical coordinate is (x, y), each subnet is by abscissa zone [x-w, x+w], [y-l is identified with ordinate interval, y+l], w is the wide of subnet, and l is the length of subnet;
Each subnet comprises a couple in router and more than one access node, and all access nodes in a subnet are connected with the couple in router in same subnet, and each access node is positioned at the diverse location of subnet, and its geographical coordinate has uniqueness; Vehicle node has route and forwarding capability;
Each access node or couple in router are by a global I Pv6 address designation, the global I Pv6 address identifying a couple in router or access node is made up of four parts, Part I and Part II are respectively the subnet abscissa of 32 bits and the subnet ordinate of 32 bits, and its value equals geographical abscissa and the ordinate of subnet Centroid; Part III and Part IV are the access node abscissa of 32 bits and the access node ordinate of 32 bits, and its value equals geographical abscissa and the ordinate of couple in router or access node;
Each vehicle node has a global I Pv6 address and a local I Pv6 address, and wherein global I Pv6 address is used for the route between subnet, and local I Pv6 address is used for the route in subnet; The global I Pv6 address of vehicle node is made up of four parts, and Part I and Part II are respectively the access node abscissa of 32 bits and the access node ordinate of 32 bits, and its value equals the geographical abscissa of access node and geographical ordinate; Part III is the extension field of i bit, and its value is 0; Part IV is the vehicle ID of (64-i) bit, and this vehicle ID has global uniqueness;
The local I Pv6 address of vehicle node is made up of four parts, and Part I and Part II are respectively the vehicle node abscissa of 32 bits and the vehicle node ordinate of 32 bits, and its value equals the geographical abscissa of vehicle node and geographical ordinate; Part III is the extension field of i bit, and its value is 0; Part IV is the vehicle ID of (64-i) bit, and this vehicle ID has global uniqueness;
The installation space of vehicle ID is [1,2 64-i-1]; When car networking is divided into K subnet, the vehicle ID installation space P so in kth subnet kas shown in formula (1), 1≤k≤K:
P k = &lsqb; ( k - 1 ) &CenterDot; 2 64 - i K + 1 , k &CenterDot; 2 64 - i K &rsqb; ; 1 &le; k < K &lsqb; ( k - 1 ) &CenterDot; 2 64 - i K + 1 , k &CenterDot; 2 64 - i K - 1 &rsqb; ; k = K Formula (1),
After vehicle node starts, the couple in router to place subnet sends address request; After couple in router receives address request, return an address response message to vehicle node, this address response message load is the vehicle ID of minimum unassigned, and the vehicle ID that then couple in router distributes to vehicle node is labeled as distribution state; After vehicle node receives address response message, preserve this vehicle ID;
Vehicle node obtains the data of a geographical coordinate by data address, data address is made up of three parts, Part I and Part II are respectively the access node abscissa of 32 bits and the access node ordinate of 32 bits, and its value equals the geographical abscissa of access node and geographical ordinate; Part III is data message territory, data message territory is made up of data abscissa, data ordinate and data ID set, wherein, the geographical position that data abscissa and data ordinate identification data produce, a data ID defines a kind of data type, and data ID set is the data ID set of the various data types relevant to this geographical position.
2. the networking of the car based on locating information implementation method according to claim 1, it is characterized in that, each access node and vehicle node safeguard a tables of data, and the list item of this tables of data comprises four territories: data ID territory, geographical coordinate territory, data field and life span territory.
3. the networking of the car based on locating information implementation method according to claim 1, it is characterized in that, after vehicle node starts, first obtain the geographical coordinate of access node in the car networking of place and the geographical abscissa zone of place subnet and geographical ordinate interval.
4. the car based on locating information according to claim 2 networking implementation method, is characterized in that, be positioned at subnet S1 at vehicle node V, be arranged in the current location of all access node access node AP1 and vehicle node V of subnet S1 nearest when; When vehicle node V creates and oneself current geographic position (x v, y v) relevant data time, perform following steps:
Step 101: start;
Step 102: vehicle node V creates global I Pv6 address and the local I Pv6 address of oneself of access node AP1, in global I Pv6 address, subnet abscissa and subnet ordinate are set to the geographical abscissa of the Centroid of subnet S1 and geographical ordinate, access node abscissa and access node ordinate are set to the geographical abscissa of access node AP1 and geographical ordinate, in local I Pv6 address, vehicle node abscissa and vehicle node ordinate are set to (x v, y v), vehicle ID is set to the vehicle ID of vehicle node V;
Step 103: vehicle node V sends data sharing message, and the source address of this data sharing message is the local I Pv6 address of oneself, and destination address is the global I Pv6 address of access node AP1, load be produce with geographical position (x v, y v) relevant data, the data ID of these data and life cycle;
Step 104: according to the geographical coordinate of access node AP1 in destination address, data sharing Message routing is to access node AP1, data sharing message through routed path in intermediate car node receive data sharing message after, a list item is created in tables of data, the data ID of this list item, data value and life cycle are set to the data ID in data sharing message respectively, data value and life cycle, the geographic coordinate values of this list item is set to vehicle node abscissa in data sharing message in destination address and vehicle node ordinate value, the i.e. geographical coordinate of vehicle node V,
Step 105: terminate.
5. the networking of the car based on locating information implementation method according to claim 1, is characterized in that, be arranged in subnet S1 at vehicle node V, and the couple in router of subnet S1 is that AR1, vehicle node V ask geographical position (x p, y p) data when;
If geographical position (x p, y p) be positioned at subnet S1, and in subnet S1 in all access nodes access node AP1 distance geographical position (x p, y p) recently, so vehicle node V performs following step and obtains geographical position (x p, y p) data:
Step 201: start;
Step 202: vehicle node V builds a data address and a local I Pv6 address, wherein, access node abscissa in data address and access node ordinate are set to geographical abscissa and the ordinate of access node AP1, and data abscissa and data ordinate are set to (x p, y p), data ID set is set to the data ID set of the various data that vehicle node V will obtain, in local I Pv6 address, vehicle abscissa and vehicle ordinate are set to geographical abscissa and the ordinate of the current position of vehicle node V, and vehicle ID is the vehicle ID of vehicle node V;
Step 203: vehicle node V sends data request information, and the destination address of this data request information is the data address built, and source address is the local I Pv6 address built;
Step 204: according to the access node abscissa in destination address and access node ordinate, data request information is forwarded to next-hop node;
Step 205: after next-hop node receives data request information, checks the data oneself whether saving vehicle node V request, if carry out step 206, otherwise carry out step 207;
Step 206: next-hop node returns a data response message to vehicle node V, the source address of data response message is the destination address of the data request information that next-hop node receives, destination address is the source address of the data request information that next-hop node receives, load is data and the life cycle of vehicle node V request, carry out step 210;
Step 207: next-hop node judges that whether oneself is access node AP1, if not then carry out step 208, otherwise carry out step 209;
Step 208: next-hop node will receive data request information to be continued to be forwarded to next-hop node, performs step 205;
Step 209: access node AP1 obtains the data of vehicle node V request and returns a data response message to vehicle node V, the source address of data response message is the destination address of the data request information that access node AP1 receives, destination address is the source address of the data request information received, and load is data and the life cycle of vehicle node V request;
Step 210: the destination address asking message according to data response, final data response message arrives vehicle node V, data response message through routed path in intermediate car node and after vehicle node V receives data response message, preserve the data in data response message, namely in tables of data, a list item is increased for each data ID in the data ID set in source address in data response message, geographical coordinate is data abscissa in data response message in source address and data ordinate, data value respectively in the load of data response message of data value and life cycle and life cycle,
Step 211: terminate.
6. the networking of the car based on locating information implementation method according to claim 5, is characterized in that, be arranged in subnet S1 at vehicle node V, and the couple in router of subnet S1 is that AR1, vehicle node V ask geographical position (x p, y p) data when;
If geographical position (x p, y p) be positioned at subnet S1, and in subnet S1 in all access nodes access node AP1 distance geographical position (x p, y p) recently, in step 209, the data that access node AP1 asks according to following Procedure Acquisition vehicle node V:
Step 301: start;
Step 302: access node AP1 creates oneself global I Pv6 address, in global I Pv6 address, subnet abscissa and subnet ordinate are set to the geographical abscissa of the Centroid of subnet S1 and geographical ordinate, and access node abscissa and access node ordinate are set to the geographical abscissa of access node AP1 and geographical ordinate;
Step 303: the source address in the data request information received is updated to the global I Pv6 address of oneself by access node AP1, and sends this data request information;
Step 304: according to data abscissa in destination address and data ordinate (x p, y p), data request information is forwarded to next-hop node;
Step 305: after next-hop node receives data request information, checks the data oneself whether saving vehicle node V request, if carry out step 306, otherwise carry out step 307;
Step 306: next-hop node returns a data response message to access node AP1, the source address of data response message is the destination address of the data request information that next-hop node receives, destination address is the source address of the data request information that next-hop node receives, load is data and the life cycle of vehicle node V request, carry out step 310;
Step 307: next-hop node judges whether the geographical position coordinates of oneself is (x p, y p), if not then carry out step 308, otherwise carry out step 309;
Step 308: next-hop node will receive data request information to be continued to be forwarded to next-hop node, performs step 305;
Step 309: geographical position coordinates is (x p, y p) vehicle node produce vehicle node V request data, return a data response message simultaneously, the source address of data response message is the destination address of the data request information received, destination address is the source address of the data request information received, and load is data and the life cycle of vehicle node V request;
Step 310: the destination address asking message according to data response, final data response message arrives access node AP1, data response message through routed path in intermediate car node and after access node AP1 receives data response message, preserve the data in data response message, namely in tables of data, a list item is increased for each data segment ID in the data ID set in source address in data response message, geographical coordinate is data abscissa in data response message in source address and data ordinate, data value and life cycle respectively data are want by the data value in Message Payload and life cycle,
Step 311: terminate.
7. the networking of the car based on locating information implementation method according to claim 6, is characterized in that, be arranged in subnet S1 at vehicle node V, and the couple in router of subnet S1 is that AR1, vehicle node V ask geographical position (x p, y p) data when;
If geographical position (x p, y p) being positioned at subnet S2, the couple in router of subnet S2 is AR2, access node AP2 distance geographical position (x in all access nodes in subnet S2 p, y p) recently, in subnet S1, in all access nodes, access node AP1 distance vehicle node V is nearest, and so vehicle node V performs following step and obtains geographical position (x p, y p) data:
Step 401: start;
Step 402: vehicle node V builds a data address and a local I Pv6 address, wherein, access node abscissa in data address and access node ordinate are set to geographical abscissa and the ordinate of access node AP2, and data abscissa and data ordinate are set to (x p, y p), data ID set is set to the data ID set of all data that vehicle node V will obtain, in local I Pv6 address, vehicle abscissa and vehicle ordinate are set to geographical abscissa and the ordinate of the current position of vehicle node V, and vehicle ID is the vehicle ID of vehicle node V;
Step 403: vehicle node V sends data request information, and the destination address of this data request information is the data address built, and source address is the local I Pv6 address built;
Step 404: according to the access node abscissa in destination address and access node ordinate, the i.e. geographical position of access node AP2, be positioned at subnet S2 according to access node AP2, is forwarded to the next-hop node that distance access node AP1 is nearest by data request information;
Step 405: after next-hop node receives data request information, checks the data oneself whether saving vehicle node V request, if carry out step 406, otherwise carry out step 407;
Step 406: next-hop node returns a data response message to vehicle node V, the source address of data response message is the destination address of the data request information that next-hop node receives, destination address is the source address of the data request information that next-hop node receives, load is data and the life cycle of vehicle node V request, carry out step 414;
Step 407: next-hop node judges that whether oneself is access node AP1, if not then carry out step 408, otherwise carry out step 409;
Step 408: next-hop node continues to be forwarded to the nearest next-hop node of distance access node AP1 by receiving data request information, performs step 405;
Step 409: access node AP1 builds the global I Pv6 address of vehicle node V, wherein, the access node abscissa of global I Pv6 address and access node ordinate are the geographical abscissa of access node AP1 and geographical ordinate, vehicle ID is set to the vehicle ID of vehicle node V, then the source address of data request information is updated to the global I Pv6 address of vehicle node V, and this data request information is sent to couple in router AR1;
Step 410: the data request information received is transmitted to couple in router AR2 by couple in router AR1, the data request information received is transmitted to access node AP2 by couple in router AR2;
Step 411: judge the data whether access node AP2 has vehicle node V and ask, if had, carry out step 413, otherwise carry out step 412;
Step 412: access node AP2 obtains the data of vehicle node V request;
Step 413: access node AP2 returns a data response message to vehicle node V, the source address of data response message is the destination address of the data request information that access node AP2 receives, destination address is the source address of the data request information received, load is data and the life cycle of vehicle node V request, data response message is sent to couple in router AR2, data response message is transmitted to couple in router AR1 according to the destination address of data response message by couple in router AR2, data response message is transmitted to access node AP1 according to the destination address of data response message by couple in router AR1, after access node AP1 receives data response message, destination address in data response message is updated to the local I Pv6 address of vehicle node V, then this data response message is sent, access node AP1 preserves the data in data response message simultaneously,
Step 414: according to the destination address of data response message, data response message finally arrives vehicle node V, data response message through routed path in intermediate car node and after vehicle node V receives data response message, preserve the data in data response message, namely in tables of data, a list item is increased for each data ID in the data ID set in source address in data response message, geographical coordinate is data abscissa in data response message in source address and data ordinate, data value respectively in the load of data response message of data value and life cycle and life cycle,
Step 415: terminate;
In step 412, the access node AP2 data of asking according to following Procedure Acquisition vehicle node V:
Step 501: start;
Step 502: access node AP2 creates oneself global I Pv6 address, in global I Pv6 address, subnet abscissa and subnet ordinate are set to the geographical abscissa of the Centroid of subnet S2 and geographical ordinate, and access node abscissa and access node ordinate are set to the geographical abscissa of access node AP2 and geographical ordinate;
Step 503: the source address in the data request information received is updated to the global I Pv6 address of oneself by access node AP2, and sends this data request information;
Step 504: according to data abscissa in destination address and data ordinate (x p, y p), data request information is forwarded to next-hop node;
Step 505: after next-hop node receives data request information, checks the data oneself whether saving vehicle node V request, if carry out step 506, otherwise carry out step 507;
Step 506: next-hop node returns a data response message to access node AP2, the source address of data response message is the destination address of the data request information that next-hop node receives, destination address is the source address of the data request information that next-hop node receives, load is data and the life cycle of vehicle node V request, carry out step 510;
Step 507: next-hop node judges whether the geographical position coordinates of oneself is (x p, y p), if not then carry out step 508, otherwise carry out step 509;
Step 508: next-hop node will receive data request information to be continued to be forwarded to next-hop node, performs step 505;
Step 509: geographical position coordinates is (x p, y p) vehicle node produce vehicle node V request data, return a data response message simultaneously, the source address of data response message is the destination address of the data request information received, destination address is the source address of the data request information received, and load is data and the life cycle of vehicle node V request;
Step 510: the destination address asking message according to data response, final data response message arrives access node AP1, data response message through routed path in intermediate car node and after access node AP1 receives data response message, preserve the data in data response message, namely in tables of data, a list item is increased for each data segment ID in the data ID set in source address in data response message, geographical coordinate is data abscissa in data response message in source address and data ordinate, data value and life cycle respectively data are want by the data value in Message Payload and life cycle,
Step 511: terminate.
8. the networking of the car based on locating information implementation method according to claim 7, it is characterized in that, vehicle node V is by vehicle ID unique identification, if two or more vehicle node receives data response message, so only preserve vehicle node out this data response message that the vehicle ID in destination address identifies, other nodes abandon this data response message.
9. the networking of the car based on locating information implementation method according to claim 7, it is characterized in that, in step 413, after access node AP1 receives data response message, preserve the data in data response message, namely in tables of data, a list item is increased for each data ID in the data ID set in source address in data response message, geographical coordinate is data abscissa in data response message in source address and data ordinate, data value respectively in the load of data response message of data value and life cycle and life cycle.
10. the networking of the car based on locating information implementation method according to claim 9, it is characterized in that, the vehicle ID of vehicle node remains unchanged in life cycle, by vehicle ID unique identification in whole life cycle.
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