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Cross-layer vehicle network routing method based on link transmission capacity

A vehicle network and routing technology, applied in the field of communication

Active Publication Date: 2017-08-29
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] Technical problem: The technical problem to be solved by the present invention is to overcome the shortcomings of traditional routing under VANET, provide a routing method that comprehensively considers the influence of link transmission capacity in urban scenarios, ensure the stable transmission capacity of links, and improve the utilization of network resources Rate

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  • Cross-layer vehicle network routing method based on link transmission capacity
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  • Cross-layer vehicle network routing method based on link transmission capacity

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Embodiment Construction

[0018] It will be described in detail below in conjunction with the accompanying drawings.

[0019] The mobility of vehicles in the vehicle ad hoc network makes the network topology change frequently, and there are buildings in the urban scene, and the routing link is more likely to change than the general mobile ad hoc network. The traditional routing protocol implements the routing selection algorithm by maintaining the routing link table. If the link is frequently disconnected due to the movement of nodes, it will have a great impact on the effectiveness of network communication.

[0020] In order to solve this problem, the present invention proposes a routing mechanism based on link transmission capability, the algorithm flow is as follows figure 1 shown. According to the location of neighbor nodes and channel usage, the feasible links of each hop are predicted to optimize routing selection. The VeMAC protocol is used for access at the MAC layer. All nodes access the con...

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Abstract

The present invention provides a cross-layer vehicle network routing method based on a link transmission capacity. In a vehicle network city scene, the method combines an existing MAC layer access protocol to reflect transmission effectiveness between nodes through defining and representing parameters of the communication capacity between the nodes through considering the transmission failure probability generated by channel fading and neighbor node channel usage condition; and on this basis, a new routing metric suitable for city scenes is given to realize the protocol design of a network layer and an MAC layer so as to more effectively utilize the nodes for forwarding. The cross-layer vehicle network routing method based on the link transmission capacity takes the improvement of the link stability as an objective and reduces the number of times of repeatedly establishing a route as far as possible so as to reduce the average end-to-end time delay and reduce the packet loss probability.

Description

technical field [0001] The invention designs a cross-layer vehicular network routing method based on link transmission capability, which 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...

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Application Information

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IPC IPC(8): H04W4/00H04W40/02H04W40/14H04W40/20H04W84/18H04L12/721
CPCH04L45/14H04W4/70H04W40/02H04W40/14H04W40/205H04W84/18Y02D30/70
Inventor 朱琦贲挹坤
Owner NANJING UNIV OF POSTS & TELECOMM
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