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Routing method of geographic information based on road topology in vehicle network

A topology, vehicle network technology, applied in the field of communication, can solve problems such as performance impact, achieve high forwarding efficiency, improve the effect of average end-to-end delay

Active Publication Date: 2020-04-24
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the urban scene of the vehicle network, because of the occlusion of buildings, the data transmission between vehicle nodes needs to be sent according to the topology of the road structure, and the performance of traditional routing based on geographical information is affected.

Method used

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  • Routing method of geographic information based on road topology in vehicle network
  • Routing method of geographic information based on road topology in vehicle network
  • Routing method of geographic information based on road topology in vehicle network

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Embodiment Construction

[0028] When designing the routing protocol in the urban scene of the vehicle network, because of the occlusion of the building, the data transmission between the vehicle nodes needs to be sent according to the topology of the road structure. When the traditional geographical location-based routing algorithm selects the next-hop node The nearest point of the node is forwarded, and the transmission performance is poor. When data is sent to a hole in the network, it will enter the edge transmission mode, and maintaining the edge transmission mode for a long time will affect the overall network performance.

[0029] In order to solve these two problems, the present invention proposes a geographical information routing based on road topology in an improved vehicle-mounted network. The algorithm flow is as follows figure 1 shown. The geographic information routing protocol based on road topology is mainly aimed at urban scenes, because of the occlusion of buildings and the movement...

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Abstract

The present invention discloses a geographic information routing method based on a road topological structure in a vehicle network. The method combines an existing MAC layer access protocol, uncontested channel access and route selection are employed, the next hop node located in a cavity is eliminated, transmission target nodes in two hops are determined, and the next hop node route criteria is defined through combination of the access condition of business channels; and through combination of the features of intersection nodes, an improved edge transmission mode is provided to reduce the transmission performance reduction caused by keeping the edge transmission mode for a long time. The geographic information routing method based on the road topological structure in the vehicle network takes improvement of the validity of route selection each time as the objective to reduce the generation of low efficiency forwarding as much as possible so as to reduce the average end-to-end time delay and reduce the packet loss rate.

Description

technical field [0001] The invention designs a geographic information routing method based on a road topology in a vehicle network, and belongs to the technical field of communication. Background technique [0002] As a research direction of mobile ad hoc network (MANET), vehicular ad hoc network (VANET) has important applications in intelligent transportation system (ITS). VANET regards vehicle nodes and road infrastructure as network nodes, and mainly realizes communication between vehicles (V2V, Vehicle-to-Vehicle Communication) and communication between vehicles and roadside facilities (V2I, Vehicle-to-Infrastructure Communication). The real-time communication mobile network improves traffic safety and management efficiency, and also provides more services for vehicle driving. Due to the high mobility of vehicles, VANET has the characteristics of frequent network topology changes. In VANET scenarios, general MANET protocols are prone to network interruption, high delay,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/40H04W4/46H04W40/02H04W40/20H04W40/24H04W84/18H04L12/721
CPCH04L45/14H04W4/70H04W40/02H04W40/20H04W40/205H04W40/246H04W40/248H04W84/18
Inventor 朱琦贲挹坤
Owner NANJING UNIV OF POSTS & TELECOMM
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