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

• Jingxian Wang,
• Yongmei Sun,
• Shuyun Luo,
• Yuefeng Ji,

Vol. 12, No. 12, December 30, 2018
10.3837/tiis.2018.12.011 , Download Paper (Free):

• Wireless Body Area Networks
• interference mitigation
• resource scheduling
• QoS-aware adaptive coloring
• relay scheme
• multi-coloring

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.

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