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Vehicular Ad Hoc network self-adaption routing protocol method

A routing protocol and self-adaptive technology, applied in network topology, electrical components, wireless communication, etc., can solve problems such as low vehicle density, packet transmission conflicts, and data packet loss, so as to reduce the probability of data packet collisions and solve communication problems. The link is unstable and the effect of improving the packet delivery rate

Inactive Publication Date: 2016-08-10
SUN YAT SEN UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The path calculated by this type of protocol is too long and the vehicle density is too small, resulting in low connectivity between vehicles, large delays, and even loss of data packets, or frequent link breaks causing delays to increase , the ratio of packet transmission collisions increases, resulting in a larger load on the network

Method used

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  • Vehicular Ad Hoc network self-adaption routing protocol method

Examples

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Embodiment 1

[0072] An adaptive routing protocol method of a vehicle-mounted Ad Hoc network, the protocol method includes a monitoring step of a routing node network and a link state, a data packet forwarding step and a route repairing step. Specifically, the monitoring steps specifically include:

[0073] A1. The nodes in the network periodically send the routing request packet REQ including the current node link status, node ip address, and unique identification number, and use the Bayesian network to calculate the packet sending probability between each node and the neighbor node, and establish the network state Probability transition matrix.

[0074] A2. Other nodes in the network receive REQ, update the network state probability transition matrix, and obtain the Markov chain;

[0075] In order to maintain the information table in the network, it is necessary to maintain links between several layers of nodes in the network. In this specific embodiment, a Bayesian network method is us...

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Abstract

The invention relates to the field of vehicle self-organizing network, and particularly relates to a vehicular Ad Hoc network self-adaption routing protocol method. The protocol method comprises the step of routing node network and link state monitoring. The step of monitoring comprises the steps that A1. a node in a network periodically sends a route request packet REQ, and a Bayesian network is used to calculate the probability of packet sending of nodes and neighbor nodes to establish a network state probability transition matrix; A2. other nodes in the network receives the REQ, and the network state probability transition matrix is updated to acquire a Markov chain; A3. the network state probability transition of the nodes is used to calculate the connectivity of links in the Markov chain, and an REQ or REP data packet is selected and sent. According to the monitoring mechanism provided by the invention, the problem of unstable communication link in a VANET network is effectively solved; the probability of data packet conflict is reduced; and a good way is provided for data traffic model prediction.

Description

technical field [0001] The present invention relates to the field of vehicle self-organizing network, more specifically, relates to an adaptive routing protocol method of vehicle Ad Hoc network. Background technique [0002] Vehicle Ad hoc network (VANET, Vehicular Ad-hoc NETwork, vehicle self-organizing network) is an adaptive network composed of several mobile wireless nodes with receiving and transmitting functions. Overcoming the shortcomings of the existing network, VANET communication network has a wide range of uses in military and civilian fields. Nodes in VANET need to complete communication without any preset infrastructure, not only need to act as source and sink nodes, but also need to act as routers to forward packets sent by other nodes, so appropriate routing protocols are required to realize these functions . However, due to the high-speed movement of the nodes in the VANET with the vehicle, the network topology changes frequently, the communication link is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W40/24H04W40/38H04W84/18
CPCH04W40/248H04W40/38H04W84/18
Inventor 彭石周杰英刘映淋许杨鹏
Owner SUN YAT SEN UNIV
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