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Cost-based replacement policy for multimedia proxy across wireless Internet

The multimedia proxy plays an important role in media streaming applications. In this paper, we propose an architecture for a multimedia proxy across the wireless Internet. By considering multiple objectives of the multimedia proxy, we design a unified cost metric to measure proxy performance in the wireless Internet. Furthermore, we propose a cost-based replacement policy for the wireless Internet to improve performance such as throughput, media quality, and startup delay. Simulation results demonstrate that our policy achieves significantly better performance than the conventional replacement policy.