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This paper proposes a novel mobility integration method and heuristic algorithm in WiMax network. The objective of the method focuses on cooperation of the ASN anchored mobility and SIP mobility and uses the B2BUA concept to improve the handoff performance as well as to reduce the handoff dropping rate. As the B2BUA acts as a proxy to handle the link layer and application layer handoffs, the handoff decision and policy can be enforced in a heuristic manner. Experimental simulations were performed and the results show that the proposed scheme can effectively utilize the traffic links to achieve the aforementioned objective.
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