Geographic Routing And Secure Navigation In VANETs

With the sharp increase of vehicles on roads and the development of the mobile Internet,the research on Vehicular Ad Hoc Networks(VANETs)has drawn more and more research attention from industry and academia.The communication between vehicles or between vehicles and the infrastructures by means of wireless technology has a great potential to improve traffic safety and travelling comfort of passengers.In this thesis,we concern on the efficiency and security of message relay in the VANETs.Firstly,we propose a novel Adaptive Fuzzy Multiple Attribute Decision Routing protocol(AFMADR).The proposed AFMADR scheme can improve delivery ratio and reduce delivery delay with a reasonable number of hops among the other well-known geographic routings in VANET.Secondly,we propose an enhanced VANET-based navigation protocol(EVSPN)on the basis of the security analysis on the previous work.The EVSPN can prevent the replay attack and man-in-the-middle attack.Timestamp and signature provide messages in the EVSPN scheme freshness and integrity.Moreover,a novel lightweight VANETbased navigation protocol(LSVN)is proposed.Formal logic has been used to derive the logical correctness of the LSVN scheme with the capacity to provide the guarantee of the integrity and the mutual authentication of the messages.The LSVN reduces the computation cost and delay incurred in the authentication process while keeping the same security functionality of the EVSPN scheme.Lastly,we integrate LTE D2D technique with conventional DSRC in vehicular environment.A novel public transported based heterogeneous vehicular network(PHVN)is proposed.Based on PHVN,a novel public transport based vehicular network routing protocol(PHVR)and an authentication framework(AFPHVN)are proposed.Simulation shows that PHVR has higher delivery ratio and lower delivery delay than the public transport based routing protocol in conventional VANET.And formal proof and simulation results shows that AFPHVN is secure and efficient.In summary,this thesis proposes novel geographic routings and secure navigation schemes basing on the analysis of the characters of VANETs and the integration of LTE D2D technique.