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Issue No.03 - March (2011 vol.10)
pp: 362-376
Yu Zhang , Rutgers University, North Brunswick
Zhibin Wu , Rutgers University, North Brunswick
Wade Trappe , Rutgers University, North Brunswick
In this paper, we 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, we analyze the movement pattern of mobile nodes and approximate it as a semi-Markov process. Based on this model, we explore different components of the underlying service delay and propose that APs should use a multicast strategy to minimize the queuing delay component. Furthermore, we demonstrate the feasibility of employing nodes, which already have their own local copies of location-relevant data, to relay such data to other nodes by employing one or multiple communication channels. Lastly, we examine the resulting algorithms and study their performance relative to baseline content-delivery schemes through simulations.
Location-dependent and sensitive, pervasive computing, wireless sensor networks.
Yu Zhang, Zhibin Wu, Wade Trappe, "Adaptive Location-Oriented Content Delivery in Delay-Sensitive Pervasive Applications", IEEE Transactions on Mobile Computing, vol.10, no. 3, pp. 362-376, March 2011, doi:10.1109/TMC.2010.167
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