Hierarchical Mobile IPv6 Mobility Management in Integrated Wi-Fi and WiMAX Networks

Abstract

The Mobile IPv6 has been proposed to solve the problem of mobility in mobile networks by handling routing of IPv6 packets to mobile nodes that handover across the visited and home networks. However, the Mobile IPv6 (HMIPv6) introduce long handover delay and signaling load. The Hierarchical Mobile IPv6 can solve the problem by splitting the handover management to macro-mobility and micro-mobility schemes. Although much research was focus on modified Mobile IPv6 to get better efficient performance, there are few papers to discuss admission control when considering handover and mobility management. In this paper, we extend HMIPv6 Binding Update message to support Call Admission Control (CAC) schemes. These CAC schemes can reduce the probability of the handoff dropping and cell overload, and limit the new call blocking probability. We also propose our schemes to a realistic scenario in integrated Wi-Fi and WiMAX networks.