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IEICE TRANSACTIONS on Communications

Cost- and Energy-Aware Multi-Flow Mobile Data Offloading Using Markov Decision Process

Cheng ZHANG, Bo GU, Zhi LIU, Kyoko YAMORI, Yoshiaki TANAKA

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Summary :

With the rapid increase in demand for mobile data, mobile network operators are trying to expand wireless network capacity by deploying wireless local area network (LAN) hotspots on which they can offload their mobile traffic. However, these network-centric methods usually do not fulfill the interests of mobile users (MUs). Taking into consideration many issues, MUs should be able to decide whether to offload their traffic to a complementary wireless LAN. Our previous work studied single-flow wireless LAN offloading from a MU's perspective by considering delay-tolerance of traffic, monetary cost and energy consumption. In this paper, we study the multi-flow mobile data offloading problem from a MU's perspective in which a MU has multiple applications to download data simultaneously from remote servers, and different applications' data have different deadlines. We formulate the wireless LAN offloading problem as a finite-horizon discrete-time Markov decision process (MDP) and establish an optimal policy by a dynamic programming based algorithm. Since the time complexity of the dynamic programming based offloading algorithm is still high, we propose a low time complexity heuristic offloading algorithm with performance sacrifice. Extensive simulations are conducted to validate our proposed offloading algorithms.

Publication
IEICE TRANSACTIONS on Communications Vol.E101-B No.3 pp.657-666
Publication Date
2018/03/01
Publicized
2017/09/19
Online ISSN
1745-1345
DOI
10.1587/transcom.2017NRP0014
Type of Manuscript
Special Section PAPER (Special Section on Network Resource Control and Management for IoT Services and Applications)
Category

Authors

Cheng ZHANG
  Waseda University
Bo GU
  Kogakuin University,Waseda University
Zhi LIU
  Waseda University,Shizuoka University
Kyoko YAMORI
  Waseda University,Shizuoka University
Yoshiaki TANAKA
  Waseda University,Asahi University

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