Discussion and performance simulation of an enhanced handover scheme in HMIPv6 networks

The handover technology is one of the most important technologies for the quality of real-time operation in mobile Internet. However, current IP-level mobility protocols have difficulties meeting the stringent handover delay requirements. In this paper, we propose an enhanced handover scheme in a heterogeneous mobile environment with the support of the Media Independent Handover (MIH) Services. The proposed scheme can reduce the handover latency in Mobile IPv6 greatly. The simulations were carried out by using NS-2 to compare the handoff performance between WiMAX and WLAN IEEE 802.11b. The results show that the proposed scheme can get better handover performance in terms of handover latency.