Load balancing early handoff scheme for multimedia service in wireless cellular networks

This study developed a load balancing early handoff scheme that use the overlap in base stations in wireless cellular networks. The proposed scheme enables early transfer of part of a heavy base station load, in order to reduce the new call blocking probability (CBP) and handoff call connection dropping probability (CDP) as well as to increase the resource utilization of wireless networks. Since the scheme is triggered by a connection request received by the base station, it immediately reflects the loading of the base station. The proposed load balancing early handoff policy can be integrated in various call admission control schemes. The effectiveness of the load balancing early handoff scheme is verified by integrating it with DMTBR, a self-optimizing admission control scheme, to improve the system performance. Additionally, NS2 is used to simulate the wireless network with wrap-around model. The simulation results show that the proposed scheme can effectively improve the wireless network resource utilization.