论文部分内容阅读
无缝垂直切换是异构无线网络融合的关键技术。通过分析垂直切换的执行过程,指出切换重认证所带来的长时延和分组丢失是影响切换性能的重要因素。对比分析了现有的几种重认证解决方案,指出了各种方案的利弊。最后,从统一认证的理念出发,权衡重认证的安全性和切换效率,提出了一种基于身份签名的快速重认证方案。该方案仅需移动节点保持一套认证信息,并与认证服务器交互一次就可完成双向认证,大大缩减了切换时延,提高了切换效率。
Seamless vertical switching is the key technology for heterogeneous wireless network convergence. By analyzing the implementation of the vertical handover, it is pointed out that the long delay and packet loss caused by the handover re-authentication are the important factors affecting the handover performance. Several existing solutions for re-certification are compared and analyzed, and the advantages and disadvantages of various solutions are pointed out. Finally, starting from the concept of unified authentication, we consider the security and switching efficiency of reauthentication and propose a fast re-authentication scheme based on identity signature. The scheme only needs a mobile node to maintain a set of authentication information and interact with the authentication server once to complete two-way authentication, greatly reducing handover delay and improving handover efficiency.