Board Self-organizing Network Qos Routing Protocols

Vehicular Ad Hoc Network (VANET), which is a new form of Mobile Wireless Ad Hoc Networks running on the road, can achieve multi-hop wireless communication between the vehicles as well as vehicles and roadside infrastructure.VANET has many characters like high-speed changing node, fixed running trajectory, infinite energy and frequently-changing network topology structure.VANET can achieve the information sharing, and also offer a broad application for the services like early warning of traffic safety, multimedia resource sharing and so on, but it all requires VANET to provide a certain level of network quality of service in the practical application. At present the QoS security technology of VANET doesn't get enough attention.According to the highway scenario in VANET, this paper first designs a High-Way Mobile Gateway Model (HWMGM), and then proposes an Adaptive Mobility Prediction Mechanism (AMPM) based on the movement characteristics of the highway vehicle node. AMPM can effectively compute the link lifetime between nodes to maintain the route connection. At last the paper mixes the AMPM and QoS multi-parameters constraint such as bandwidth, delay, packet loss rate to design and achieve a new QoS routing protocol for VANET - Prediction-Based Muti-QoS Constraint Mix Routing Protocol for VANET (PBMQR), based on the classic on-demand routing protocol AODV.This paper uses OPNET network simulation software and the VanetMobiSim node mobility model, to analyze and estimate the performance of PBMQR. It compares the PBMQR and AODV protocol in three simulation scenarios:different nodes'density, different speeds of nodes and different network load. The experimental results indicate that:Compared with the AODV protocol, PBMQR has a higher packet delivery rate, lower delay, and longer route lifetime.