CN107317890B

CN107317890B - A kind of data transmission realizing method of intelligent vehicle support grid

Info

Publication number: CN107317890B
Application number: CN201710750124.5A
Authority: CN
Inventors: 王晓喃
Original assignee: Changshu Institute of Technology
Current assignee: Changshu Institute of Technology
Priority date: 2017-08-28
Filing date: 2017-08-28
Publication date: 2019-08-30
Anticipated expiration: 2037-08-28
Also published as: CN107317890A

Abstract

The present invention provides a kind of data transmission realizing methods of intelligent vehicle support grid, the vehicle-mounted net includes three kinds of access node, server and vehicle node nodes, one server is integrated with an access node, one access node has unique geographical coordinate, and an access node and the server being integrated with share the same geographical coordinate；One access node, the server integrated with the access node and eligible 1 vehicle node constitute a domain.Vehicle node through the invention provided by the data transmission realizing method of intelligent vehicle support grid can obtain data from apart from nearest data set provider to effectively reduce the delay and cost that obtain data, improve service quality, present invention can apply to the fields such as road conditions monitoring, vehicle management, are with a wide range of applications.

Description

A kind of data transmission realizing method of intelligent vehicle support grid

Technical field

The present invention relates to a kind of a kind of transmission of the data of data transmission realizing method more particularly to intelligent vehicle support grid is real Existing method.

Background technique

In recent years, many research work are dedicated to intelligent vehicle support grid, to enable vehicle drive people's quick obtaining data Guarantee to exercise safety.With the development of vehicle-mounted network technology, intelligent vehicle support grid can become following and provide the one mode of service.

Currently, the implementation pattern of intelligent vehicle support grid is to be realized by broadcasting, therefore delay and cost are all bigger, reduce Data communication feature.Therefore, the data communication delays and cost that how to reduce intelligent vehicle support grid become the heat of Recent study Point problem.

Summary of the invention

Goal of the invention: the technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide a kind of intelligent vehicle The data transmission realizing method of support grid.The present invention can obtain data from apart from nearest supplier, to reduce vehicle-mounted netting index According to the delay and cost of communication, data communication services performance is effectively increased.

Technical solution: the invention discloses a kind of data transmission realizing method of intelligent vehicle support grid, the vehicle-mounted net includes Three kinds of access node, server and vehicle node nodes, a server are integrated with an access node, an access Node has unique geographical coordinate, and an access node and the server being integrated with share the same geographical seat Mark；One access node, the server integrated with the access node and eligible 1 vehicle node constitute one Domain；

Condition 1: in all access nodes of vehicle-mounted net, vehicle node is nearest at a distance from the access node；

A kind of data are uniquely determined by a data type, such as traffic accident etc.；

One access node has a wireless interface and more than two wireline interfaces, access node by wireless interface with Vehicle node is communicated, and is connected by wireline interface with access node link；One access node saves all neighbours' accesses The geographical coordinate of node；

Vehicle node is communicated by message, and a message includes name field and load domain, and a name is comprising source Manage coordinate domain, purpose geography coordinate domain, command field, hop count domain and Data Type A domain；Source geographical coordinate domain is the vehicle for sending message The geographical coordinate purpose geographical coordinate of node, server perhaps access node is Target Access Node, server or vehicle The definition of the geographical coordinate of node, command field is as shown in table 1, and hop count domain defines the transmission range of a message, and hop count domain is only Have in the case where purpose geography coordinate domain value is 0 or order thresholding is 5 just effectively, the initial value in hop count domain is to set in advance It sets；Data Type A domain defines target data；If purpose geography coordinate domain value is 0, in the transmission range that hop count domain defines All access nodes or server be Target Access Node or server；Hop count domain is only in purpose geography coordinate domain In the case that value is 0 or order thresholding is 5 just effectively, in the case of other and without using hop count thresholding.Such as hop count domain is first Initial value is set as 3；

Table 1:

Command type	Order thresholding
		Log-in command	1
Publication order	2
		Delete command	3
Obtain data command	4
		Returned data order	5
Obtain data success command	6

One server saves a tables of data, and a data table items include Data Type A domain, data value field and Life Cycle It is deleted from tables of data if the life cycle domain of a data table items decays to 0 in phase domain；

One server saves a forwarding table, and a forwarding-table item includes Data Type A domain and geographical coordinate domain, data The data of one type of type domain identifier, geographical coordinate domain are the geographical seat for saving the server for the data that Data Type A domain defines Mark；

In data C1 by data type CY1 unique identification, the access node in the D1 of domain is AP1, integrated with access node AP1 Server together is S1, under conditions of the geographical coordinate of access node AP1 is (x1, y1), if vehicle node V1 is located at In the D1 of domain and data C1 is produced, vehicle node V1 executes following registration processes:

Step 101: starting；

Step 102: vehicle node V1 constructs a name N1, and in name N1, source geographical coordinate is that vehicle node V1 works as Preceding geographical coordinate, purpose geographical coordinate are (x1, y1), and order thresholding is 1, and hop count thresholding is 0, and data type thresholding is CY1； Vehicle node V1 sends a message, and the name thresholding of the message is run after fame word N1, and load thresholding is data C1；

Step 103: if access node AP1 receives the message that name is N1 and data are C1, which being forwarded To server S 1 and step 107 is executed, it is no to then follow the steps 104；

Step 104: if the vehicle node E1 in the D1 of domain is received from vehicle node E2, name is N1 and data are C1's Message and meet condition 2, thens follow the steps 105, it is no to then follow the steps 106；

Condition 2: the current geographic coordinate of vehicle node E1 is less than vehicle at a distance from the purpose geographical coordinate in name N1 The current geographic coordinate of node E2 is at a distance from the purpose geographical coordinate in name N1；

Step 105: the message received is then forwarded to neighbor node by vehicle node E1, executes step 103；

Step 106: vehicle node E1 abandons the message received；Execute step 103；

Step 107: after server S 1 receives the message that name is N1 and data are C1, a number is created in tables of data According to list item, the data type of the data table items is the data type in name N1, and data value is data C1, and life cycle is maximum Life cycle, such as 20mins；

Step 108: if server S 1 detects that the data type of only one data table items in tables of data is CY1, Then follow the steps 109, it is no to then follow the steps 112；

Step 109: in the creation of server S 1 one name N2, name N2, source geographical coordinate is that the geographical of server S 1 sits Mark, purpose geographical coordinate are 0, and order thresholding is 2, and hop count thresholding is preset value, and data type thresholding is CY1；Service Device S1 constructs a message, and the name thresholding of the message is run after fame word N2, and load thresholding is sky, and server S 1 forwards that message to Access node AP1 after access node AP1 receives the message, sends this from each wireline interface connecting with access node and disappears Breath；

Step 110: after access node receives the message that name thresholding is N2, forwarding that message to and integrate Server, the server create a forwarding-table item in forwarding table, and the data type thresholding of the forwarding-table item runs after fame word N2's Data type thresholding, geographical coordinate are the source geographical coordinate in name N2；The access node passs the hop count thresholding in name N2 Subtract 1, if the value of hop count thresholding is not equal to 0, thens follow the steps 111, it is no to then follow the steps 112；

Step 111: receive name thresholding be N2 message access node from the interface in addition to receiving the message it The wireline interface that outer all and access node is connect sends the message, executes step 110；

Step 112: terminating.

The registration operation of data may be implemented so that it is guaranteed that user correctly rapidly obtains data in the above process.

In the method for the invention, if server S 1 detects that the life cycle of a data table items in tables of data declines It is kept to 0, the data type of the data table items is CY1, then deleting the data table items from tables of data；If server S 1 detects Not having data type into tables of data at this time is the data table items of CY1, and server S 1 then executes forwarding table renewal process:

Step 201: starting；

Step 202: in the creation of server S 1 one name N3, name N3, source geographical coordinate is that the geographical of server S 1 sits Mark, purpose geographical coordinate are 0, and order thresholding is 3, and hop count thresholding is preset value, and data type thresholding is CY1；Service Device S1 constructs a message, and the name thresholding of the message is run after fame word N3, and load thresholding is sky, and server S 1 forwards that message to The access node AP1 integrated, after access node AP1 receives the message, from it is each connect with access node it is wired Interface sends the message；

Step 203: after access node receives the message that name thresholding is N3, forwarding that message to and integrate Server, the server is from data type thresholding is deleted equal to the data type thresholding and geographical coordinate in name N3 in forwarding table Thresholding is the forwarding-table item of the source geographical coordinate thresholding in name N3；Hop count thresholding in name N3 is successively decreased 1 by the access node, If the value of hop count thresholding is not equal to 0,204 are thened follow the steps, it is no to then follow the steps 205；

Step 204: receive name thresholding be N3 message access node from the interface in addition to receiving the message it The wireline interface that outer all and access node is connect sends the message, executes step 203；

Step 205: terminating.

The above process can be with real-time update forwarding table so that it is guaranteed that user correctly rapidly obtains data.

In the method for the invention, in data C1 by data type CY1 unique identification, the access node in the D1 of domain is AP1, It is S1 with the server that access node AP1 is integrated, the geographical coordinate of access node AP1 is (x1, y1), server S 1 Under conditions of there are data types in tables of data for the data table items of CY1, if vehicle node V2 is located at domain D1, geographical coordinate For (x2, y2), vehicle node V2 obtains data C1 by following processes:

Step 301: starting；

Step 302: vehicle node V2 construct a name N4, in name N4, source geographical coordinate be geographical coordinate (x2, Y2), purpose geographical coordinate is (x1, y1), and order thresholding is 4, and hop count thresholding is 0, and data type thresholding is CY1；Vehicle node V2 sends a message, and the name thresholding of the message is run after fame word N4, and load thresholding is sky；

Step 303: if access node AP1 receives the message that name is N4, server S 1 is forwarded that message to, Execute step 309；It is no to then follow the steps 304；

Step 304: if the vehicle node for receiving the message that name is N4 is capable of providing data C1, thening follow the steps 305, it is no to then follow the steps 306；

Step 305: the vehicle node for receiving the message that name is N4 constructs name N5, and in name N5, source geography is sat It is designated as (0,0), purpose geographical coordinate is (x2, y2), and order thresholding is 5, and hop count thresholding is initial value, and data type thresholding is CY1；The vehicle node sends a message, and the name thresholding of the message is run after fame word N5, and load thresholding is data C1, execution step 310；

Step 306: if receive name be N4 message vehicle node from vehicle node E3 receive the message and The purpose geography that the vehicle node is less than in vehicle node E3 and name N4 at a distance from the purpose geographical coordinate in name N4 is sat Target distance, thens follow the steps 307, no to then follow the steps 308；

Step 307: receive name be N4 message vehicle node forward the message to neighbours' vehicle node or Neighbours' access node executes step 303；

Step 308: the vehicle node for receiving the message that name is N4 abandons the message, executes step 303；

Step 309: server S 1 checks tables of data and selects the tables of data of data type of the data type equal to name N4 , server S 1 constructs name N5, and in name N5, source geographical coordinate is (0,0), and purpose geographical coordinate is (x2, y2), order Thresholding is 5, and hop count thresholding is initial value, and data type thresholding is CY1；Server S 1 constructs a message, the name of the message Thresholding is name N5, and load thresholding is the data value in data table items, i.e. data C1, then server S 1 forwards that message to Access node AP1, access node AP1 send the message from wireless interface；

Step 310: if vehicle node V2 receives the message that name is N5, thening follow the steps 314；It is no to then follow the steps 311；

Step 311: if receive name be N5 message vehicle node from vehicle node E4 receive the message and The purpose geography that the vehicle node is less than in vehicle node E4 and name N5 at a distance from the purpose geographical coordinate in name N5 is sat Target distance, thens follow the steps 313, no to then follow the steps 312；

Step 312: the vehicle node for receiving the message that name is N5 abandons the message, executes step 310；

Step 313: the vehicle node for receiving the message that name is N5 forwards the message to neighbours' vehicle node, if The vehicle node is located in a jump range of the purpose geographical coordinate position of name N5, thens follow the steps 315, otherwise executes Step 310；

Step 314: after vehicle node V2 receives the message that name is N5, saving the data C1 in the Message Payload；Vehicle Node V2 constructs name N6, and in name N6, source geographical coordinate is (x2, y2), and purpose geographical coordinate is 0, and order thresholding is 6, Hop count thresholding is 1, and data type thresholding is CY1；Vehicle node sends a message, and the name thresholding of the message is run after fame word N5, Loading thresholding is sky, executes step 319；

Step 315: if the vehicle node for receiving the message that name is N5 receives in the given time (such as 50ms) The message for being N6 to name, thens follow the steps 319, no to then follow the steps 316；

Step 316: the jumping figure value in name N5 is successively decreased 1 by the vehicle node for receiving the message that name is N5, if this When name N5 in jumping figure value be equal to 0, then follow the steps 319, it is no to then follow the steps 317；

Step 317: the vehicle node for receiving the message that name is N5 forwards the message to neighbours' vehicle node；

Step 318: if vehicle node V2 receives the message that name is N5, then follow the steps 314, it is no to then follow the steps 315；

Step 319: terminating.

The above process may insure that user correctly rapidly obtains data.

In the method for the invention, a server saves a required list, and each request list item includes Data Type A domain And name field；In data C1 by data type CY1 unique identification, the access node in the D5 of domain is AP5, with access node AP1 collection It is S5 at server together, the geographical coordinate of access node AP5 is (x5, y5), is not present in the tables of data of server S 5 Still at least there is the condition for the forwarding-table item that an item data type is CY1 in forwarding table in the data table items that data type is CY1 Under, if vehicle node V4 is located at domain D5, geographical coordinate is (x4, y4), and vehicle node V4 obtains data by following processes C1:

Step 401: starting；

Step 402: vehicle node V4 construct a name A1, in name A1, source geographical coordinate be geographical coordinate (x4, Y4), purpose geographical coordinate is (x5, y5), and order thresholding is 4, and hop count thresholding is 0, and data type thresholding is CY1；Vehicle node V4 sends a message, and the name thresholding of the message is run after fame word A1, and load thresholding is sky；

Step 403: if vehicle node receives the message that name is A1, thening follow the steps 404；It is no to then follow the steps 409；

Step 404: if the vehicle node for receiving the message that name is A1 is capable of providing data C1, thening follow the steps 405, it is no to then follow the steps 406；

Step 405: the vehicle node for receiving the message that name is A1 constructs name A2, and in name A2, source geography is sat It is designated as (0,0), purpose geographical coordinate is (x4, y4), and order thresholding is 5, and hop count thresholding is initial value, and data type thresholding is CY1；The vehicle node sends a message, and the name thresholding of the message is run after fame word A2, and load thresholding is data C1, execution step 413；

Step 406: if receive name be A1 message vehicle node from vehicle node H1 receive the message and The purpose geography that the vehicle node is less than in vehicle node H1 and name A1 at a distance from the purpose geographical coordinate in name A1 is sat Target distance, thens follow the steps 407, no to then follow the steps 408；

Step 407: receive name be A1 message vehicle node forward the message to neighbours' vehicle node or Neighbours' access node executes step 403；

Step 408: the vehicle node for receiving the message that name is A1 abandons the message, executes step 403；

Step 409: the access node for receiving the message that name is A1 checks required list, is if there is no data type Data type and name thresholding in name A1 are run after fame the request list item of word A1, then the access node creates a request list item, The data type of the request list item is that the data type and name thresholding in name A1 are run after fame word A1；The access node will receive Message be transmitted to the server integrated with oneself, server receives the tables of data that oneself is checked after the message, if There are the data table items that data type thresholding is equal to the data type in name A1 in the tables of data of server, then follow the steps 410, it is no to then follow the steps 411；

Step 410: server checks required list and all data type thresholdings is selected to run after fame the data type value in word A1 Request list item, for the request list item of each selection, server executes operations described below: one name of server construction, at this In name, source geographical coordinate is (0,0), and purpose geographical coordinate is that the source geography in the name thresholding of the request list item of selection is sat Mark, order thresholding are 5, and hop count thresholding is initial value, and data type thresholding is run after fame the data type in word A1；Server construction one A message, the name thresholding of the message are the name of building, and load thresholding is the data that data type thresholding is equal in name A1 The data value of the data table items of type；The message of building is transmitted to the access node integrated by server；Access node After receiving the message, if the purpose geographical coordinate in the name thresholding of the message belongs to the domain where the access node, access Node then forwards the message from wireless interface, and otherwise access node calculates the mesh in neighbours' access node and the message name thresholding Geographical coordinate distance, then select apart from nearest access node, and from the wireline interface being connected with the access node turn Send out the message；Execute step 413；

Step 411: if receiving an only request list item in the required list of the access node for the message that name is A1 Data type thresholding run after fame the data type thresholding of word N1, then follow the steps 412, it is no to then follow the steps 413；

Step 412: the access node for receiving the message that name is A1 checks that all data types are equal to name in required list Then the forwarding-table item of data type in word A1 selects geographical coordinate domain value and oneself nearest turn from these forwarding-table items Purpose geography coordinate domain value in name A1 is updated to the forwarding by forwarding list item, the access node for receiving the message that name is A1 Geographical coordinate thresholding in list item；Access node calculates neighbours' access node at a distance from the purpose geographical coordinate in name A1, Then it selects apart from nearest access node, and forwards the message from the wireline interface being connected with the access node, execute step 403；

Step 413: if vehicle node V4 receives the message that name is A2, then follow the steps 419, it is no to then follow the steps 414；

Step 414: if vehicle node receives the message that name is A2, row step 415 is no to then follow the steps 418；

Step 415: if receive name be A2 message vehicle node from vehicle node H2 receive the message and The purpose geography that the vehicle node is less than in vehicle node H2 and name A2 at a distance from the purpose geographical coordinate in name A2 is sat Target distance, thens follow the steps 417, no to then follow the steps 416；

Step 416: the vehicle node for receiving the message that name is A2 abandons the message, executes step 413；

Step 417: the vehicle node for receiving the message that name is A2 forwards the message to neighbours' vehicle node, if The vehicle node is located in a jump range of the purpose geographical coordinate position of name A2, thens follow the steps 420, otherwise executes Step 413；

Step 418: the access node for receiving the message that name is A2 forwards the message to the service integrated Device, server check required list and select all data type thresholdings be equal to name A2 in data type value request list item, For each request list item chosen, server executes operations described below: one name of server construction, in the name, source Managing coordinate is (0,0), and purpose geographical coordinate is the source geographical coordinate in the name thresholding of the request list item of selection, and order thresholding is 5, hop count thresholding is initial value, and data type thresholding is run after fame the data type in word A2；One message of server construction, the message Name thresholding be building name, load thresholding be the message received load thresholding；Server turns the message of building Issue the access node integrated；After access node receives the message, if the destination in the name thresholding of the message Reason coordinate belongs to the domain where the access node, and access node then forwards the message from wireless interface, and otherwise access node calculates Then neighbours' access node selects at a distance from the purpose geographical coordinate in the message name thresholding apart from nearest access section Point, and the message is forwarded from the wireline interface being connected with the access node；Execute step 413；

Step 419: after vehicle node V4 receives the message that name is A2, saving the data C1 in the Message Payload；Vehicle Node V4 constructs name A3, and in name A3, source geographical coordinate is (x4, y4), and purpose geographical coordinate is 0, and order thresholding is 6, Hop count thresholding is 1, and data type thresholding is CY1；Vehicle node sends a message, and the name thresholding of the message is run after fame word A3, Loading thresholding is sky, executes step 424；

Step 420: if the vehicle node for receiving the message that name is A2 receives in the given time (such as 50ms) The message for being A3 to name, thens follow the steps 424, no to then follow the steps 421；

Step 421: the jumping figure value in name A2 is successively decreased 1 by the vehicle node for receiving the message that name is A2, if this When name A2 in jumping figure value be equal to 0, then follow the steps 424, it is no to then follow the steps 422；

Step 422: the vehicle node for receiving the message that name is A2 forwards the message to neighbours' vehicle node；

Step 423: if vehicle node V4 receives the message that name is A2, then follow the steps 419, it is no to then follow the steps 420；

Step 424: terminating.

The above process can data needed for quick obtaining to reduce the cost and delay of data acquisition.

The utility model has the advantages that vehicle node passes through this present invention provides a kind of data transmission realizing method of intelligent vehicle support grid The data transmission realizing method of intelligent vehicle support grid provided by inventing can from apart from nearest data set provider obtain data from And the delay and cost for obtaining data are effectively reduced, service quality is improved, present invention can apply to road conditions monitorings, vehicle Management etc. fields, be with a wide range of applications.

Detailed description of the invention

The present invention is done with reference to the accompanying drawings and detailed description and is further illustrated, of the invention is above-mentioned And/or otherwise advantage will become apparent.

Fig. 1 is data register flow diagram of the present invention.

Fig. 2 is that forwarding table of the present invention updates flow diagram.

Fig. 3 is local acquisition data flow diagram of the present invention.

Fig. 4 is long-range acquisition data flow diagram of the present invention.

Specific embodiment:

The present invention provides a kind of data transmission realizing method of intelligent vehicle support grid, vehicle node is provided through the invention The data transmission realizing method of intelligent vehicle support grid can obtain data from apart from nearest data set provider to be effectively reduced The delay and cost for obtaining data, improve service quality, present invention can apply to the necks such as road conditions monitoring, vehicle management Domain is with a wide range of applications.

Fig. 1 is data register flow diagram of the present invention.The vehicle-mounted net includes access node, server and vehicle Three kinds of nodes of node, a server are integrated with an access node, and an access node has unique geographical Coordinate, an access node and the server being integrated with share the same geographical coordinate；One access node, with should Server that access node integrates and eligible 1 vehicle node constitute a domain；

A kind of data are uniquely determined by a data type；

Vehicle node is communicated by message, and a message includes name field and load domain, and a name is comprising source Manage coordinate domain, purpose geography coordinate domain, command field, hop count domain and Data Type A domain；Source geographical coordinate domain is the vehicle for sending message The geographical coordinate purpose geographical coordinate of node, server perhaps access node is Target Access Node, server or vehicle The definition of the geographical coordinate of node, command field is as shown in table 1, and hop count domain defines the transmission range of a message, and hop count domain is only Have in the case where purpose geography coordinate domain value is 0 or order thresholding is 5 just effectively, the initial value in hop count domain is to set in advance It sets；Data Type A domain defines target data；If purpose geography coordinate domain value is 0, in the transmission range that hop count domain defines All access nodes or server be Target Access Node or server；

Table 1:

Step 101: starting；

Step 106: vehicle node E1 abandons the message received；Execute step 103；

Step 107: after server S 1 receives the message that name is N1 and data are C1, a number is created in tables of data According to list item, the data type of the data table items is the data type in name N1, and data value is data C1, and life cycle is maximum Life cycle；

Step 112: terminating.

Fig. 2 is that forwarding table of the present invention updates flow diagram.If server S 1 detects one in tables of data The life cycle of a data table items decays to 0, and the data type of the data table items is CY1, then deleting the number from tables of data According to list item；If server S 1 detects that not having data type in tables of data at this time is the data table items of CY1, server S 1 if, is held Row forwarding table renewal process:

Step 201: starting；

Step 205: terminating.

Fig. 3 is local acquisition data flow diagram of the present invention.It is uniquely marked in data C1 by data type CY1 Know, the access node in the D1 of domain is AP1, is S1, the ground of access node AP1 with the server that access node AP1 is integrated Coordinate is managed for (x1, y1), under conditions of there are data types in the tables of data of server S 1 for the data table items of CY1, if vehicle Node V2 is located at domain D1, and geographical coordinate is (x2, y2), and vehicle node V2 passes through following processes acquisition data C1:

Step 301: starting；

Step 315: if it is N6 that the vehicle node for receiving the message that name is N5 receives name in the given time Message, then follow the steps 319, it is no to then follow the steps 316；

Step 319: terminating.

Fig. 4 is long-range acquisition data flow diagram of the present invention.One server saves a required list, each Requesting list item includes Data Type A domain and name field；Access node in data C1 by data type CY1 unique identification, in the D5 of domain It is S5 with the server that access node AP1 is integrated for AP5, the geographical coordinate of access node AP5 is (x5, y5), service Still at least there is an item data type in forwarding table and be in the data table items for being CY1 there is no data type in the tables of data of device S5 Under conditions of the forwarding-table item of CY1, if vehicle node V4 is located at domain D5, geographical coordinate is (x4, y4), and vehicle node V4 is logical It crosses following processes and obtains data C1:

Step 401: starting；

Step 420: if it is A3 that the vehicle node for receiving the message that name is A2 receives name in the given time Message, then follow the steps 424, it is no to then follow the steps 421；

Step 424: terminating.

Embodiment 1

Based on the simulation parameter of table 1, the present embodiment simulates the data transmission realizing method of intelligent vehicle support grid in the present invention, Performance evaluation is as follows: in the increased situation of vehicle node quantity of request data, realized and polymerize due to required list, data Communication cost declines therewith.The average cost that vehicle node obtains data is 5.6.

1 simulation parameter of table

The present invention provides a kind of thinkings of the data transmission realizing method of intelligent vehicle support grid, implement the technical solution Method and approach it is very much, the above is only a preferred embodiment of the present invention, it is noted that for the general of the art For logical technical staff, various improvements and modifications may be made without departing from the principle of the present invention, these improve and Retouching also should be regarded as protection scope of the present invention.The available prior art of each component part being not known in the present embodiment is subject to reality It is existing.

Claims

1. a kind of data transmission realizing method of intelligent vehicle support grid, which is characterized in that the vehicle-mounted net includes access node, service Three kinds of nodes of device and vehicle node, a server are integrated with an access node, and an access node has unique Geographical coordinate, access node and the server being integrated with share the same geographical coordinate；One access section Point, the server integrated with the access node and eligible 1 vehicle node constitute a domain；

A kind of data are uniquely determined by a data type；

One access node has a wireless interface and more than two wireline interfaces, and access node passes through wireless interface and vehicle Node is communicated, and is connected by wireline interface with access node link；One access node saves all neighbours' access nodes Geographical coordinate；

Vehicle node is communicated by message, and a message includes name field and load domain, and a name is sat comprising source geography Mark domain, purpose geography coordinate domain, command field, hop count domain and Data Type A domain；Source geographical coordinate domain is the vehicle section for sending message Point, server perhaps access node geographical coordinate purpose geographical coordinate be Target Access Node, server or vehicle node Geographical coordinate, the definition of command field is as shown in table 1, and hop count domain defines the transmission range of a message, and hop count domain only exists In the case that purpose geography coordinate domain value is 0 or order thresholding is 5 just effectively, the initial value in hop count domain is to preset；Number Target data is defined according to type field；It is all in the transmission range that hop count domain defines if purpose geography coordinate domain value is 0 Access node or server are Target Access Node or server；

Table 1:

One server saves a tables of data, and a data table items include Data Type A domain, data value field and life cycle domain, If the life cycle domain of a data table items decays to 0, it is deleted from tables of data；

One server saves a forwarding table, and a forwarding-table item includes Data Type A domain and geographical coordinate domain, data type The data of one type of domain identifier, geographical coordinate domain are the geographical coordinate for saving the server for the data that Data Type A domain defines；

In data C1 by data type CY1 unique identification, the access node in the D1 of domain is AP1, is integrated in one with access node AP1 The server risen is S1, under conditions of the geographical coordinate of access node AP1 is (x1, y1), if vehicle node V1 is located at domain D1 In and produce data C1, vehicle node V1 executes following registration processes:

Step 101: starting；

Step 102: vehicle node V1 constructs a name N1, and in name N1, source geographical coordinate is vehicle node V1 current Geographical coordinate, purpose geographical coordinate are (x1, y1), and order thresholding is 1, and hop count thresholding is 0, and data type thresholding is CY1；Vehicle Node V1 sends a message, and the name thresholding of message is run after fame word N1, and load thresholding is data C1；

Step 103: if access node AP1 receives the message that name is N1 and data are C1, being by the name received The message that N1 and data are C1 is transmitted to server S 1 and executes step 107, no to then follow the steps 104；

Step 104: if the vehicle node E1 in the D1 of domain receives the message that name is N1 and data are C1 from vehicle node E2 And meet condition 2, and then follow the steps 105, it is no to then follow the steps 106；

Condition 2: the current geographic coordinate of vehicle node E1 is less than vehicle node at a distance from the purpose geographical coordinate in name N1 The current geographic coordinate of E2 is at a distance from the purpose geographical coordinate in name N1；

Step 106: vehicle node E1 abandons the message received；Execute step 103；

Step 107: after server S 1 receives the message that name is N1 and data are C1, a tables of data is created in tables of data , the data type of the data table items is the data type in name N1, and data value is data C1, and life cycle is maximum life Period；

Step 108: if server S 1 detects that the data type of only one data table items in tables of data is CY1, holding Row step 109, it is no to then follow the steps 112；

Step 109: in the creation of server S 1 one name N2, name N2, source geographical coordinate is the geographical coordinate of server S 1, mesh Geographical coordinate be 0, order thresholding be 2, hop count thresholding be preset value, data type thresholding be CY1；1 structure of server S Build a message, the name thresholding of message is run after fame word N2, and load thresholding is sky, and server S 1 runs after fame the name thresholding of building word The message of N2 is transmitted to access node AP1, access node AP1 receive the name thresholding run after fame word N2 message after, from each The wireline interface connecting with access node sends the name thresholding received and runs after fame the message of word N2；

Step 110: after access node receives the message that name thresholding is N2, the name thresholding that this is received runs after fame word N2's Message is transmitted to the server integrated, which creates a forwarding-table item in forwarding table, the forwarding-table item Data type thresholding is run after fame the data type thresholding of word N2, and geographical coordinate is the source geographical coordinate in name N2；The access node Hop count thresholding in name N2 is successively decreased 1, if the value of hop count thresholding is not equal to 0, thens follow the steps 111, it is no to then follow the steps 112；

Step 111: the access node for receiving the message that name thresholding is N2 is run after fame word N2 from addition to receiving the name thresholding Message interface except all wireline interfaces being connect with access node send the name thresholding and run after fame the message of word N2, hold Row step 110；

Step 112: terminating.

2. a kind of data transmission realizing method of intelligent vehicle support grid according to claim 1, which is characterized in that if service Device S1 detects that the life cycle of a data table items in tables of data decays to 0, and the data type of the data table items is CY1, The data table items are so deleted from tables of data；If server S 1 detects that not having data type in tables of data at this time is CY1 Data table items, server S 1 then executes forwarding table renewal process:

Step 201: starting；

Step 202: in the creation of server S 1 one name N3, name N3, source geographical coordinate is the geographical coordinate of server S 1, mesh Geographical coordinate be 0, order thresholding be 3, hop count thresholding be preset value, data type thresholding be CY1；1 structure of server S Build a message, the name thresholding of message is run after fame word N3, and load thresholding is sky, and server S 1 runs after fame the name thresholding of the building The message of word N3 is transmitted to the access node AP1 integrated, and access node AP1 receives the name thresholding and runs after fame word N3's After message, the name thresholding is sent from each wireline interface connecting with access node and is run after fame the message of word N3；

Step 203: access node receive name thresholding be N3 message after, by the name thresholding run after fame word N3 message forward To the server integrated, the server is from data type thresholding is deleted equal to the data type in name N3 in forwarding table Thresholding and geographical coordinate thresholding are the forwarding-table item of the source geographical coordinate thresholding in name N3；The access node will be in name N3 Hop count thresholding successively decreases 1, if the value of hop count thresholding is not equal to 0, thens follow the steps 204, no to then follow the steps 205；

Step 204: the access node for receiving the message that name thresholding is N3 is run after fame word N3 from addition to receiving the name thresholding Message interface except all wireline interfaces being connect with access node send the name thresholding and run after fame the message of word N3, hold Row step 203；

Step 205: terminating.

3. a kind of data transmission realizing method of intelligent vehicle support grid according to claim 2, which is characterized in that in data C1 By data type CY1 unique identification, the access node in the D1 of domain is AP1, is with the access node AP1 server integrated The geographical coordinate of S1, access node AP1 are (x1, y1), and there are the tables of data that data type is CY1 in the tables of data of server S 1 Under conditions of, if vehicle node V2 is located at domain D1, geographical coordinate is (x2, y2), and vehicle node V2 passes through following processes Obtain data C1:

Step 301: starting；

Step 302: vehicle node V2 constructs a name N4, and in name N4, source geographical coordinate is geographical coordinate (x2, y2), Purpose geographical coordinate is (x1, y1), and order thresholding is 4, and hop count thresholding is 0, and data type thresholding is CY1；Vehicle node V2 hair Send a message, the name thresholding of message is run after fame word N4, and load thresholding is sky；

Step 303: if access node AP1 receives the message that name is N4, which being run after fame the message of word N4 It is transmitted to server S 1, executes step 309；It is no to then follow the steps 304；

Step 304: if receiving the vehicle node of message that name is N4 is capable of providing data C1, then follow the steps 305, it is no Then follow the steps 306；

Step 305: the vehicle node for receiving the message that name is N4 constructs name N5, and in name N5, source geographical coordinate is (0,0), purpose geographical coordinate are (x2, y2), and order thresholding is 5, and hop count thresholding is initial value, and data type thresholding is CY1；It should Vehicle node sends a message, and the name thresholding of message is run after fame word N5, and load thresholding is data C1, execution step 310；

Step 306: being if the vehicle node for receiving the message that name is N4 receives the name thresholding from vehicle node E3 The message of name N4 and the vehicle node are less than vehicle node E3 and name N4 at a distance from the purpose geographical coordinate in name N4 In purpose geographical coordinate distance, then follow the steps 307, it is no to then follow the steps 308；

Step 307: receiving the vehicle node of the message that name is N4 for the run after fame message of word N4 of the name thresholding and be forwarded to neighbour Vehicle node or neighbours' access node are occupied, step 303 is executed；

Step 308: the vehicle node for receiving the message that name is N4 abandons the name thresholding and runs after fame the message of word N4, executes step Rapid 303；

Step 309: server S 1 checks tables of data and selects the data table items of data type of the data type equal to name N4, takes Be engaged in device S1 building name N5, and in name N5, source geographical coordinate is (0,0), and purpose geographical coordinate is (x2, y2), order thresholding It is 5, hop count thresholding is initial value, and data type thresholding is CY1；Server S 1 constructs a message, and the name thresholding of message is Name N5, load thresholding are the data value in data table items, i.e. data C1, then server S 1 runs after fame the name thresholding word N5 Message be transmitted to access node AP1, access node AP1 sends the name thresholding from wireless interface and runs after fame the message of word N5；

Step 311: being if the vehicle node for receiving the message that name is N5 receives the name thresholding from vehicle node E4 The message of name N5 and the vehicle node are less than vehicle node E4 and name N5 at a distance from the purpose geographical coordinate in name N5 In purpose geographical coordinate distance, then follow the steps 313, it is no to then follow the steps 312；

Step 312: the vehicle node for receiving the message that name is N5 abandons the name thresholding and runs after fame the message of word N5, executes step Rapid 310；

Step 313: receiving the vehicle node of the message that name is N5 for the run after fame message of word N5 of the name thresholding and be forwarded to neighbour Vehicle node is occupied, if the vehicle node is located in a jump range of the purpose geographical coordinate position of name N5, is executed Step 315, no to then follow the steps 310；

Step 314: vehicle node V2 receive name be N5 message after, save the name thresholding run after fame word N5 Message Payload in Data C1；Vehicle node V2 constructs name N6, and in name N6, source geographical coordinate is (x2, y2), and purpose geographical coordinate is 0, Order thresholding is 6, and hop count thresholding is 1, and data type thresholding is CY1；Vehicle node sends a message, the name thresholding of message For name N5, loading thresholding is sky, executes step 319；

Step 315: if it is disappearing for N6 that the vehicle node for receiving the message that name is N5 receives name in the given time Breath, thens follow the steps 319, no to then follow the steps 316；

Step 316: the jumping figure value in name N5 is successively decreased 1 by the vehicle node for receiving the message that name is N5, if name at this time Jumping figure value in word N5 is equal to 0, thens follow the steps 319, no to then follow the steps 317；

Step 317: receiving the vehicle node of the message that name is N5 for the run after fame message of word N5 of the name thresholding and be forwarded to neighbour Occupy vehicle node；

Step 319: terminating.

4. a kind of data transmission realizing method of intelligent vehicle support grid according to claim 3, which is characterized in that a service Device saves a required list, and each request list item includes Data Type A domain and name field；It is unique by data type CY1 in data C1 It identifies, it is S5 with the server that access node AP1 is integrated that the access node in the D5 of domain, which is AP5, access node AP5's Geographical coordinate is (x5, y5), the data table items that data type is CY1 is not present in the tables of data of server S 5 but in forwarding table Under conditions of at least there is the forwarding-table item that an item data type is CY1, if vehicle node V4 is located at domain D5, geographical coordinate For (x4, y4), vehicle node V4 obtains data C1 by following processes:

Step 401: starting；

Step 402: vehicle node V4 constructs a name A1, and in name A1, source geographical coordinate is geographical coordinate (x4, y4), Purpose geographical coordinate is (x5, y5), and order thresholding is 4, and hop count thresholding is 0, and data type thresholding is CY1；Vehicle node V4 hair Send a message, the name thresholding of message is run after fame word A1, and load thresholding is sky；

Step 404: if receiving the vehicle node of message that name is A1 is capable of providing data C1, then follow the steps 405, it is no Then follow the steps 406；

Step 405: the vehicle node for receiving the message that name is A1 constructs name A2, and in name A2, source geographical coordinate is (0,0), purpose geographical coordinate are (x4, y4), and order thresholding is 5, and hop count thresholding is initial value, and data type thresholding is CY1；It should Vehicle node sends a message, and the name thresholding of message is run after fame word A2, and load thresholding is data C1, execution step 413；

Step 406: being if the vehicle node for receiving the message that name is A1 receives the name thresholding from vehicle node H1 The message of name A1, and the vehicle node is less than vehicle node H1 and name A1 at a distance from the purpose geographical coordinate in name A1 In purpose geographical coordinate distance, then follow the steps 407, it is no to then follow the steps 408；

Step 407: receiving the vehicle node of the message that name is A1 for the run after fame message of word A1 of the name thresholding and be forwarded to neighbour Vehicle node or neighbours' access node are occupied, step 403 is executed；

Step 408: the vehicle node for receiving the message that name is A1 abandons the name thresholding and runs after fame the message of word A1, executes step Rapid 403；

Step 409: the access node for receiving the message that name is A1 checks required list, is name if there is no data type Data type and name thresholding in A1 are run after fame the request list item of word A1, then the access node creates a request list item, this is asked The data type for seeking list item is that data type and name thresholding in name A1 is run after fame word A1；The name that the access node will receive Word thresholding is that the message of name A1 is transmitted to the server integrated with oneself, and server receives name thresholding and runs after fame word A1 Message after check oneself tables of data, if there are data type thresholdings to be equal to the number in name A1 in the tables of data of server According to the data table items of type, 410 are thened follow the steps, it is no to then follow the steps 411；

Step 410: server checks required list and the data type value that selects all data type thresholdings to run after fame in word A1 is asked List item is sought, for the request list item of each selection, server executes operations described below: one name of server construction, in the name In, source geographical coordinate is (0,0), and purpose geographical coordinate is the source geographical coordinate in the name thresholding of the request list item of selection, life Enabling thresholding is 5, and hop count thresholding is initial value, and data type thresholding is run after fame the data type in word A1；Server construction one disappears Breath, the name thresholding of message are the name of building, and load thresholding is the data type that data type thresholding is equal in name A1 The data value of data table items；The message of building is transmitted to the access node integrated by server；Access node receives clothes It is engaged in after the message of device building, if the purpose geographical coordinate in the name thresholding of the message of server construction belongs to the access node The domain at place, access node then forward the message of the server construction from wireless interface, and otherwise access node calculates neighbours' access Then node selects at a distance from the purpose geographical coordinate in the message name thresholding of the server construction apart from nearest access Node, and forward from the wireline interface being connected with the access node message of the server construction；Execute step 413；

Step 411: if receiving the number of only one request list item in the required list of the access node for the message that name is A1 It runs after fame the data type thresholding of word N1 according to type thresholding, thens follow the steps 412, it is no to then follow the steps 413；

Step 412: the access node for receiving the message that name is A1 checks that all data types are equal to name A1 in required list In data type forwarding-table item, geographical coordinate domain value and oneself nearest forwarding table are then selected from these forwarding-table items , the purpose geography coordinate domain value in name A1 is updated to the forwarding-table item by the access node for receiving the message that name is A1 In geographical coordinate thresholding；Access node calculates neighbours' access node at a distance from the purpose geographical coordinate in name A1, then Selection is apart from nearest access node, and forwarding the name from the wireline interface being connected with the access node is the message of A1, is held Row step 403；

Step 415: if it is A2's that the vehicle node for receiving the message that name is A2, which receives the name from vehicle node H2, Message, and the vehicle node is less than the purpose in vehicle node H2 and name A2 at a distance from the purpose geographical coordinate in name A2 The distance of geographical coordinate, thens follow the steps 417, no to then follow the steps 416；

Step 416: the vehicle node for receiving the message that name is A2 abandons the message that the name is A2, executes step 413；

Step 417: the message that the name is A2 is forwarded to neighbours' vehicle section by the vehicle node for receiving the message that name is A2 Point thens follow the steps 420 if the vehicle node is located in a jump range of the purpose geographical coordinate position of name A2, It is no to then follow the steps 413；

Step 418: the message that the name is A2 is forwarded to by the access node for receiving the message that name is A2 to be integrated Server, server check required list and select all data type thresholdings be equal to name A2 in data type value request List item, for each request list item chosen, server executes operations described below: one name of server construction, in the name, Source geographical coordinate is (0,0), and purpose geographical coordinate is the source geographical coordinate in the name thresholding of the request list item of selection, command field Value is 5, and hop count thresholding is initial value, and data type thresholding is run after fame the data type in word A2；One message of server construction, disappears The name thresholding of breath is the name of building, and load thresholding is the load thresholding of the message received；Server is by the message of building It is transmitted to the access node integrated；After access node receives the message of the server construction, if the server construction Message name thresholding in purpose geographical coordinate belong to the domain where the access node, access node then turns from wireless interface The message of the server construction is sent out, otherwise access node calculates the message name thresholding of neighbours' access node and the server construction In purpose geographical coordinate distance, then select apart from nearest access node, and wired from being connected with the access node Interface forwards the message of the server construction；Execute step 413；

Step 419: after vehicle node V4 receives the message that name is A2, saving the data in the Message Payload that the name is A2 C1；Vehicle node V4 constructs name A3, and in name A3, source geographical coordinate is (x4, y4), and purpose geographical coordinate is 0, command field Value is 6, and hop count thresholding is 1, and data type thresholding is CY1；Vehicle node sends a message, and the name thresholding of message is run after fame word A3, load thresholding are sky, execute step 424；

Step 420: if it is disappearing for A3 that the vehicle node for receiving the message that name is A2 receives name in the given time Breath, thens follow the steps 424, no to then follow the steps 421；

Step 421: the jumping figure value in name A2 is successively decreased 1 by the vehicle node for receiving the message that name is A2, if name at this time Jumping figure value in word A2 is equal to 0, thens follow the steps 424, no to then follow the steps 422；

Step 422: the message that the name is A2 is forwarded to neighbours' vehicle section by the vehicle node for receiving the message that name is A2 Point；

Step 424: terminating.