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Reliable Data Transmission Mechanism in Coexisting IEEE 802.15.4 Beacon Enabled Wireless Body Area Networks

Since WBAN has limited bandwidth, its performance in the industrial, scientific, and medical (ISM) band degrades as the number of active devices sharing the same spectrum increases. The increasing device density challenges device and packet synchronization mechanism that raise collision probabilities during carrier sense. In this view, access to the transmission channel for health care applications with WBAN coexistence is limited, and the transmission of aperiodic data becomes unreliable. Therefore, in this article, we propose WBAN performance improvement through adaptive channel access mechanisms. We propose device synchronization, dynamic backoff and channel access mechanism (CCA) in stationary and mobile networks. We implement the proposed mechanism using carrier sense multiple access with collision avoidance (CSMA-CA) for multiple WBAN scheme in IEEE 802.15.4 wireless standard and analyze its end to end delay performance. Moreover, we analyze the effect of the different beacon (BO) and superframe (SO) order for device synchronization in multiple existence cases. The implementation of the proposed mechanism outperforms the conventional IEEE 802.15.4 and the transmission scheme applied in Traffic Class Prioritization Medium Access Control (TCP-MAC) protocols. Simulation results show the average delay of the proposed protocol decreased by 67% and 56.8% at a WBAN speed of 0.5m/s and by 54.1% and 26.31% at a WBAN speed of 1m/s when compared to the standard protocol and the TCP-MAC, respectively.