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Car-to-car data routing method

A data routing, inter-vehicle technology, applied in electrical components, wireless communication, network topology, etc.

Inactive Publication Date: 2010-11-03
HUBEI UNIV OF AUTOMOTIVE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the current problem of inter-vehicle data routing, the present invention proposes an inter-vehicle data routing method that comprehensively considers vehicle motion state, wireless link quality, network topology distance, and multiple paths to improve the efficiency of vehicle network routing

Method used

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Embodiment Construction

[0068] figure 1 It is a schematic flow diagram of the inter-vehicle data routing method described in the embodiment of the present invention, specifically including the following flow:

[0069] Step 101, when a source node S in the vehicle network needs to send data to the destination node D, the source node S looks up the route to the destination node D in the routing table;

[0070] Step 102, if there is a forwarding path S→D from the source node S to the destination node D, then go to step 110, otherwise go to step 103;

[0071] Step 103, the source node S broadcasts a routing request packet (RREQ packet), and starts the routing discovery process;

[0072] Step 104, after the destination node D or the intermediate node I receive the RREQ packet, return the routing response packet (RREP packet), and start recording the maximum number of retransmissions and the maximum moving speed of the path D→S;

[0073] Step 105, after the intermediate node I receives the RREP packet, i...

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Abstract

The invention discloses a car-to-car data routing method which is characterized by comprising the following steps: a source node S broadcasts routing request packets (RREQ packets); after a destination node D or an intermediate node I receives the RREQ packets, the destination node D or the intermediate node I returns routing response packets (RREP packets) and records the maximum retransmission times MaxRetran of a path D to S and the maximum travel speed MaxSpeed; after S receives the RREP packets, S transmits the retransmission times packets (RRETRAN packets), records MaxRetran and MaxSpeed of a path S to D, and returns MaxRetran of the path D to S to D; after D receives the RRETRAN packets, D transmits the RRETRAN packets with marks and returns the MaxRetran of the path S to D to S; and after S receives the RRETRAN packets, S selects comprehensively according to the hop counts of the discovered paths, MaxRetran and MaxSpeed and selects the path with the minimum comprehensive criterion value as a forwarding path, thereby balancing the indices of hop counts, wireless link quality, car speed and the like. The method for acquiring the car speed information by the OBD technology has good practicality, accuracy and universality.

Description

technical field [0001] The invention relates to the field of wireless network and communication, in particular to a data routing method between vehicles. Background technique [0002] Vehicular Ad-hoc NETwork (VANET) is a special kind of mobile multi-hop network (Mobile Ad-hoc NETwork, MANET). Through VANET, a multi-hop, self-organizing wireless communication network will be established between vehicles, vehicles and infrastructure. Due to the characteristics of fast moving vehicles, strong network dynamics, and complex environments, efficient routing methods are required for data transmission between vehicles. Although the vehicle network is highly dynamic, vehicle motion information can be used as routing criteria to select better routes. The routing technology based on vehicle motion information uses vehicle motion information as the routing criterion, collects vehicle motion information in real time, typical vehicle motion information includes speed, driving direction,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W40/12H04W84/18
Inventor 陈宇峰简炜蒋伟荣向郑涛黄爱蓉张涛王思山江学焕
Owner HUBEI UNIV OF AUTOMOTIVE TECH
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