Design of handover scheme for IEEE 802.22 WRAN

In this paper, we propose a handover mechanism for supporting of IEEE 802.22 WRAN system. Generally, every CPE (Consumer Premise Equipment) in IEEE 802.22 WRAN (Wireless Regional Area Network) is considered as a fixed user device. For this reason, IEEE 802.22 WRAN system is not suitable for adapting to portable and mobile user devices. Mobility is one of the most important factors for mobile devices. In order to support mobility of CPEs and continue to provide broad band network service in IEEE 802.22 WRAN system, an efficient handover mechanism is essential. In this paper we propose an efficient handover mechanism using characteristics of IEEE 802.22 WRAN system. We discuss the how handover procedure can be achieved with IEEE 802.22 control frames and then we evaluate L2 handover IEEE 802.22 WRAN system. We define a handover process with a decision making algorithm to reduce the packet loss during handover operation. The handover decision is made at the BS(Base Station) based on collected information by CPEs which are located on the boundary region located near the edge of BS coverage. Also the performance results show that our proposed mechanism not only achieves low handover latency but also does so with low packet loss rate.