KSII Transactions on Internet and Information Systems (TIIS)

Korean Society for Internet Information (한국인터넷정보학회)
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A Heuristic Algorithm for Optimal Facility Placement in Mobile Edge Networks

  • Jiao, Jiping (Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, Ministry of Education, Xiamen University) ;
  • Chen, Lingyu (Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, Ministry of Education, Xiamen University) ;
  • Hong, Xuemin (Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, Ministry of Education, Xiamen University) ;
  • Shi, Jianghong (Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, Ministry of Education, Xiamen University)
  • Received : 2017.01.21
  • Accepted : 2017.03.11
  • Published : 2017.07.31
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Abstract

Installing caching and computing facilities in mobile edge networks is a promising solution to cope with the challenging capacity and delay requirements imposed on future mobile communication systems. The problem of optimal facility placement in mobile edge networks has not been fully studied in the literature. This is a non-trivial problem because the mobile edge network has a unidirectional topology, making existing solutions inapplicable. This paper considers the problem of optimal placement of a fixed number of facilities in a mobile edge network with an arbitrary tree topology and an arbitrary demand distribution. A low-complexity sequential algorithm is proposed and proved to be convergent and optimal in some cases. The complexity of the algorithm is shown to be $O(H^2{\gamma})$, where H is the height of the tree and ${\gamma}$ is the number of facilities. Simulation results confirm that the proposed algorithm is effective in producing near-optimal solutions.

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