Algorithm for the Selection of Target Base Station during Handover in Mobile Wimax 802.16e

Worldwide Interoperability for Microwave Access (WiMAX) specified by IEEE 802.16 supports Wireless Metropolitan Area Network (WMAN). In the environment of WMAN the mobile client has high mobility as it moves from the coverage area of Serving Base Station (SBS) to Target Base Station (TBS). Handoff is one of the Quality of Service (QoS) parameter in the WiMAX network which supports mobility and is the main challenging research in WiMAX network. The handoff is the process in which the mobile nodes switch from one BS to another until it gets the better signal quality. In this scheme Mobile Station (MS) scans for the TBS selection until it gets the better signal quality. The main issue in the WiMAX network is the handoff latency and it occurs when the MS is unable to predict the TBS based on the quality signal. In this paper we proposed a solution which improves the handover latency This paper introduces an implementable enhanced handover target cell selection algorithm for WiMAX network based on the effective capacity estimation and neighbor advertisement.Qualnet 5.0 simulation is also given to show the performance enhancement of the enhanced algorithm compared with the traditional algorithm based on signal power . The proposed work improves the handoff latency. Keywords— Handover, HHO, Qualnet, Scanning, Wimax.