An adaptive resource allocation mechanism including fast and reliable handoff in IP-based 3Gwireless networks

The aim of the all-IP architecture in third-generation wireless networks is to allow operators to deploy IP technology in delivering: third-generation services, that is, an architecture based on packet technologies and IP tel ephony for simultaneous real-time and non-real-time services. We present a new handoff management scheme that utilizes simultaneous multiple bindings in IP-based 3Gwireless networks. The proposed handoff scheme minimizes pack et losses and incurs negligible delays during handoff. We also present an a daptive resource allocation scheme that allocates connection resources to i ncoming calls depending on network conditions. The resources accumulated by bandwidth degradation for on-going calls are utilized to minimize dropping probability of handoff calls and blocking probability of new calls.