Intelligent Agent over WLAN with Seamless Handover and Load Balancing

This paper presents an efficient method to support pre- authentication for seamless handover and implement key distribution with EAP-SIM based AAA protocols for WLAN. Our goal is minimizing the probability of SIP calls blocking resulting from the handoff delay. The intelligent agents may play different roles; it can acts as a client authenticating with the servers and moving data from and to mobile users, or alternatively a server collecting and moving data from and to authentication servers. The benefit of server intelligent agents maintaining user´s profile is user intelligent agents do not need to access authentication servers directly, which in turns reduces re-authentication delay. The intelligent agents require adaptive changes over time. Such adaptation must be based on the information gathered concerning current network condition. By adaptive intelligent agents attempt to modify their behavior to reducing signal overhead, sharing network resources, maintaining load balancing, thus improving network performance in mobile environment. The adaptive intelligent agents manage their own execution logic and life cycle model with a finite state machine. This paper improves the performance of the existing handover in call drop rates so as to reduce the signaling traffic in wireless networks. A NS2 simulation involves plotting the performance metrics of the number of mobile nodes to find statistically probable outcome. Important aspects to be considered are seamless handover and load balancing.