Research On Cognitive Vehicle- Mounted Ad Hoc Network Routing Protocol

As a hot issue in the global public safety problem,traffic accident has become an important part that attracts increasing attention,the study of solutions to this problem has become an important subject for national organizations.After a lot of research,a kind of method that set up wireless communication between vehicles,to make sure the vehicle can get the real-time information of the road under the condition of oversight distance,and then choose the reasonable way to avoid the occurrence of malignant events,is considered to be the fundamental solution to the problem.Therefore,the concept of Vehicular Ad-hoc Network(VANET)has been widely popularized.Depending on taking advantage of the characteristics of VANET,can not only make the probability of road traffic accidents be effectively reduced by means of accident early warning and reasonable route selection,but also meet the communication needs of customers,provide the necessary information and basic guarantee of car-mounted entertainment.So that,the research of VANET has broad prospects and very important practical significance.As part of mobile Ad-hoc network,VANET inherits the characteristics of limited bandwidth and dynamic change of network topology,at the same time,VANET affected by factors such as faster node speed,greater communication environment interference and shorter routing life,which makes the study of VANET much more difficult.Therefore,how to design routing protocol with higher adaptability and better communication reliability has become a hot topic in the field of VANET.First,This paper introduced the background and significance of this research,and then summarized the overall situation of VANET,described its structure and made a simple classify,the network characteristics of VANET also be presented.Subsequently,this paper aimed at the core problem routing protocol,classified the classical routing protocol from broadcast,unicast and multicast perspectives,and then described it in detail.Among them,unicast routing protocol is more widely used,this paper classified it according two aspects,topological-based and location-based.Then the classical routing protocols in each class have been described and compared.Second,after studying the classical routing protocols,this paper aimed at solving the dynamic topology of VANET and the problem that the frequency spectrum resources become less and less,proposed an innovative VANET routing protocol based on receive.Explained its principle in detail,then according to the established model of urban street cognitive VANET,simulated the communication between vehicle nodes by using routing protocol which be proposed in this paper.Finally,got the result diagram and analyze it briefly.Finally,this paper proved that the two kind of routing protocol proposed in this paper have good adaptability and excellent performance.For different communication environment quality,different communication distance and different vehicle density conditions,simulated the communication between vehicle nodes of VANET,and then the performance results of the two kinds of routing protocols and the classical routing protocol are compared and analyzed.At the same time,this paper also gave the future research direction of this subject.