Abstract
Mobile WiMax (Worldwide Interoperability Microwave Access) is a wireless system based on IEEE 802.16e standard which provides the support for handovers between the cells. However in this handovers between the cells handover delay is introduced due to excessive scanning of frequencies by the Mobile Station (MS) in order to select a Target Base Station (TBS) as well as during the actual handover from the serving Base Station (SBS) to the TBS. In this paper two mechanisms are proposed, one to decrease the excessive scanning involved for selection of TBS using GPS system and other for the actual handover decision using distance as an added parameter for effective handover which changes dynamically depending on the velocity of the vehicle. This mechanism provides an effective improvement over the handover delay involved. Dual triggering is initiated to resolve the handover deficiency and provide an effective handover with reduction in handover delay. General Terms Mobile WiMax, GPS
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