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In this paper, the authors introduce a delay-sensitive service that involves transmitting large amounts of location-based data to nodes at multiple locations. Given a limited amount of access points (aps) and an abundance of service requests that result from the nodes moving around, a typical content delivery service would inevitably introduce considerable delay. To solve this problem, they analyze the movement pattern of mobile nodes and approximate it as a semi-Markov process. Based on this model, they explore different components of the underlying service delay and propose that ap's should use a multicast strategy to minimize the queuing delay component.
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