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Joint Transmission Slot Assignment, FSO Links Allocation and Power Control for Hybrid RF/FSO Wireless Mesh Networks

  • Zhao, Yan (College of Communication Engineering, Jilin University) ;
  • Shi, Wenxiao (College of Communication Engineering, Jilin University) ;
  • Shi, Hanyang (College of Communication Engineering, Jilin University) ;
  • Liu, Wei (College of Communication Engineering, Jilin University) ;
  • Wu, Pengxia (College of Communication Engineering, Jilin University)
  • Received : 2017.01.25
  • Accepted : 2017.06.20
  • Published : 2017.08.25

Abstract

Hybrid radio frequency/free space optical (RF/FSO) wireless mesh networks have attracted increasing attention for they can overcome the limitations of RF and FSO communications and significantly increase the throughput of wireless mesh networks (WMNs). In this article, a resource assignment optimization scheme is proposed for hybrid RF/FSO wireless mesh networks. The optimization framework is proposed for the objective of maximizing throughput of overall hybrid networks through joint transmission slot assignment, FSO links allocation and power control with the consideration of the fading nature of RF and FSO links. The scheme is formulated as an instance of mixed integer linear program (MILP) and the optimal solutions are provided using CPLEX and Gurobi optimizers. How to choose the appropriate optimizer is discussed by comparing their performance. Numerous simulations are done to demonstrate that the performance of our optimization scheme is much better than the current case of having the same topology.

Acknowledgement

Supported by : National Natural Science Foundation of China

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