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http://dx.doi.org/10.3837/tiis.2015.03.002

Cellular Traffic Offloading through Opportunistic Communications Based on Human Mobility  

Li, Zhigang (State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications)
Shi, Yan (State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications)
Chen, Shanzhi (State Key Laboratory of Wireless Mobile Communications, China Academy of Telecommunications Technology)
Zhao, Jingwen (International school, Beijing University of Posts and Telecommunications)
Publication Information
KSII Transactions on Internet and Information Systems (TIIS) / v.9, no.3, 2015 , pp. 872-885 More about this Journal
Abstract
The rapid increase of smart mobile devices and mobile applications has led to explosive growth of data traffic in cellular network. Offloading data traffic becomes one of the most urgent technical problems. Recent work has proposed to exploit opportunistic communications to offload cellular traffic for mobile data dissemination services, especially for accepting large delayed data. The basic idea is to deliver the data to only part of subscribers (called target-nodes) via the cellular network, and allow target-nodes to disseminate the data through opportunistic communications. Human mobility shows temporal and spatial characteristics and predictability, which can be used as effective guidance efficient opportunistic communication. Therefore, based on the regularity of human mobility we propose NodeRank algorithm which uses the encounter characteristics between nodes to choose target nodes. Different from the existing work which only using encounter frequency, NodeRank algorithm combined the contact time and inter-contact time meanwhile to ensure integrity and availability of message delivery. The simulation results based on real-world mobility traces show the performance advantages of NodeRank in offloading efficiency and network redundant copies.
Keywords
Cellular traffic offloading; human mobility; opportunistic communications;
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Times Cited By KSCI : 1  (Citation Analysis)
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