Abstract

Handoff is one of the essential elements that can affect the Quality of Service (QoS) and capacity of Mobile Broadband Networks. The implementation of hard handoff is obligatory for Mobile Wimax, the IEEE 802.16e standard. However, seamless mobility in Mobile Wimax without interruption of real time services under hard handoff still needs more exploration. This paper proposes an adaptive mobility handoff scheme (AMHO) to improve the effect of user mobility on handoff performance in Mobile Wimax Networks. The key notation is to detect handoff trigger point by using mobile station's movement patterns and to modify MAC layer exchange messages in handoff process. Simulation results show that the handoff performance is effectively improved in terms of packet drop and handoff latency.

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