A DECISION MODEL FOR UNIVERSAL SEAMLESS HANDOFF ARCHITECTURE .

Abstract

Roaming between the various network connection technologies like WLAN, CDMA, GSM etc. will be in high demand in the future. The user would want to roam between different networks without any interruption. It is also desirable for the subscribers to use the best network services without paying particular attention to its type. But the desire of communicating through the best connection suffers a setback with the change of location because of disparate or broken connection at that place. The remedy for this problem is to takeover the connection by another available network i.e., a Vertical Handover. A handover is called seamless if it can be done without having to restart the running applications. Various proposals for performing vertical handovers are discussed in this thesis and a prototype to deal with this problem of vertical seamless handover between WLAN , CDMA and GSM is presented. The challenging problem was to keep the session alive while changing the physical connection interfa...