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A QoS-aware Adaptive Coloring Scheduling Algorithm for Co-located WBANs

  • Wang, Jingxian (School of Information and Communication Engineering, Beijing University of Posts and Telecommunications) ;
  • Sun, Yongmei (School of Information and Communication Engineering, Beijing University of Posts and Telecommunications) ;
  • Luo, Shuyun (School of Information and Technology, Zhejiang Sci-Tech University) ;
  • Ji, Yuefeng (School of Information and Communication Engineering, Beijing University of Posts and Telecommunications)
  • Received : 2017.03.30
  • Accepted : 2018.07.13
  • Published : 2018.12.31

Abstract

Interference may occur when several co-located wireless body area networks (WBANs) share the same channel simultaneously, which is compressed by resource scheduling generally. In this paper, a QoS-aware Adaptive Coloring (QAC) scheduling algorithm is proposed, which contains two components: interference sets determination and time slots assignment. The highlight of QAC is to determine the interference graph based on the relay scheme and adapted to the network QoS by multi-coloring approach. However, the frequent resource assignment brings in extra energy consumption and packet loss. Thus we come up with a launch condition for the QAC scheduling algorithm, that is if the interference duration is longer than a threshold predetermined, time slots rescheduling is activated. Furthermore, based on the relative distance and moving speed between WBANs, a prediction model for interference duration is proposed. The simulation results show that compared with the state-of-the-art approaches, the QAC scheduling algorithm has better performance in terms of network capacity, average delay and resource utility.

Keywords

References

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