Research On Optimized Mechanism Of Security Handoff Access And Fast Handoff In Heterogeneous Networks

Secure and smooth vertical handoff of mobile node is the most urgent problem inheterogeneous wireless integrated networks.Considering the frequent vertical handoff ofheterogeneous wireless network, this paper analysis the lack of switching control and securityof access authentication mechanism. On that basis, it suggests some new optimizingmechanisms for the security and efficiency target. The main contents of this paper arefollowing：The current switching authentication mechanisms and the vertical handoff controlmechanisms are studied and researched deeply. In the heterogeneous network environment,the switching control is achieved at the network layer or a higher level，and it masks theunderlying differences in the link layer. However, the development of IP multimedia services,the increasingly performance requirements are needed on the network and the existing switchcontrol and authentication mechanism faces performance bottlenecks. In this paper, itanalyzes the vertical switch control performance and concluded that simple combination withthe handover access authentication and control process to be limiting, then a new mechanismis indispensable which means an effective integration of the two processes to shorten thehandoff latency. In addition, security issues of access authentication must be resolved in theheterogeneous network environment.It proposes a secure and fast optimizating switching mechanism based on the contexttransmission. In the handover certification process of home network, the delay of handoverincreases quickly with the accessing network and the distance between the home networkchanging. Therefore, the paper adopts context transfer protocol distributed to achieve thehandoff authentication of mobile node. Taking the sequential execution of handoff controlprocess and security handoff certification process into account, we put forward parallelthinking to run sub-processes concurrently. Furthermore, we use the ECC algorithm forsecure transmission of data and digital signatures, which is proved to be much more suitablefor mobile terminals. In the last place, we make some performance analysis, security analysisand simulation experiments of the new switch mechanism. The result shows the optimalmechanism effectively merges the handoff process. The authentication process also ensuresthe security of handoff to improve the switching performance.At last, the paper presents an identity-based access authentication mechanism, including full authentication and re-certification two parts. This access authentication mechanisms useCPK mechanisms and elliptic curve encryption system to achieve the mutual authentication,session key generation and the anonymity of the user identity. Finally, the new mechanismwas proved to be secure and efficient by security and performance analysis.