Secure routing protocol based on trust detection in vehicle-mounted ad hoc network

Abstract

The invention discloses a secure routing protocol based on trust detection in a vehicle-mounted ad hoc network. The secure routing protocol comprises the steps of firstly, according to multi-channel selection monitoring mechanism, allowing vehicle nodes with a consistent movement trend to work on the same service channel and achieve data monitoring and transmission tasks on the same service channel; the vehicle nodes acquiring routing packet forwarding behaviors of adjacent nodes through channel monitoring to establish direct trust of the adjacent nodes; and meanwhile, detecting the received hello message packets periodically transmitted by the adjacent nodes, obtaining recommend trust through a node trust list attached to the packets, then calculating and maintaining the trust list of the adjacent nodes, and assisting the nodes in making routing decisions. The routing protocol can maintain a relatively stable communication link in a vehicle-mounted environment with a rapid change in the topology, has high delivery rate and low transmission delay, and can also effectively avoid malicious behaviors of discarding routing packets by nodes through trust detection.

Description

technical field [0001] The invention relates to vehicle-mounted ad hoc network technology, in particular to a security routing protocol based on trust degree detection in the vehicle-mounted ad hoc network. Background technique [0002] With the development of intelligent transportation systems, the research on VANET-related technologies has been sought after by people. In order to meet the communication needs of VANETs in special environments, the IEEE Association formulated the bottom layer dedicated to VANETs in 2000. The communication protocol IEEE802.11p, which adopts a multi-channel scheme, divides the 75MHz bandwidth of 5.9GHz into one control channel (represented by CH178) and six service channels (represented by CH174, CH176, CH180, CH182 and CH184), as Vehicle nodes provide applications such as safety warnings, assisted driving, data sharing, and workshop entertainment. As the basic research of VANET, the routing protocol plays a decisive role in the performance o...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the existing VANET routing protocols, mainly aiming at the short life time of VENET links and the inability of traditional cryptographic system-related methods to solve the problem that malicious nodes intentionally discard data packets. Starting with the multi-channel characteristics of the network, a more flexible and stable security routing protocol based on trust detection is designed. The protocol first uses a multi-channel selection monitoring mechanism to allow vehicle nodes with the same movement trend to work on the same service channel, while movement The channel transmission link of nodes with the same trend is relatively stable, and data transmission and monitoring on the same channel can also reduce channel synchronization delay and data monitoring. Then, by monitoring and observing the routing behavior of nodes, you can Establish a trust list of neighbor nodes to assist nodes in routing decisions, which can effectively avoid malicious discarding of routing packets by nodes

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