A novel method for mitigating the effects of dynamic coexistence on the operation of IEEE 802.15.4-based mobile WSNs

作者：Deylami Mohammad^*; Jovanov Emil

来源：Wireless Communications and Mobile Computing, 2016, 16(3): 362-372.

DOI：10.1002/wcm.2522

• coexistence
• IEEE 802
• 15
• 4
• mobile wireless sensor networks
• WSN
• WPAN

Wireless networks dynamically coexist when their transmission ranges overlap as a result of mobility. Mobile wireless sensor networks (WSNs) may suffer from significant degradation of performance due to the interference caused by dynamic coexistence, which is particularly critical for health monitoring WSNs. In this paper, we propose a novel method to detect and mitigate the harmful effects of dynamic coexistence on the operation of IEEE 802.15.4-based mobile health monitoring WSNs. IEEE 802.15.4 uses the guaranteed time slots (GTS) mechanism to eliminate contention; however, successful transmissions cannot be guaranteed for coexisting WSNs. We show that using limited clear channel assessments at the beginning of the GTS enables the mobile WSNs to avoid collisions with minimum overhead. This method can also be used in combination with the previously proposed mechanisms for coexistence management. We analytically investigate the effects of using this method on the performance of the dynamically coexisting WSNs. We use OPNET simulation to investigate the coexistence of health monitoring WSNs and also to validate the proposed method. Our results indicate that using the proposed mechanism, 2-10 coexisting mobile WSNs with relatively high transmission rates (20-30% of maximum throughput) can achieve 20-90% higher rates of successful transmissions, with less than 10% increase in power consumption.

• 出版日期2016-2-25