Abstract
Recently, Wireless Body Area Network (WBAN) has drawn vast interest to many researchers due to its potential in healthcare and medical fields. In this paper, we propose the energy efficiency model of Time Diversity communication in Rician and Rayleigh fading channels emphasizing the optimal packet size. The optimal packet size to maximize energy efficiency is investigated for on-body and in-body channels. Four modulation techniques are considered including the recently proposed 16-ary Quadrature Amplitude Position Modulation (QAPM). In addition, the closed-form expression of the energy efficiency model in multipath fading is derived. Here, three evaluation metrics including the energy efficiency, the normalized throughput and the average end-to-end delay are adopted and compared to the existing 1-hop and Cooperative communications as well as our previously proposed 2-hop communication. The results show that our proposed Time Diversity communication scheme outperforms the existing ones in deep fading channel except for the average end-to-end delay.
Highlights
Wireless Body Area Network (WBAN) is one of the wireless networking technologies having a lot of applications in healthcare, medical field, sports, military and entertainments
According to the numerical results, it is clear that for poor channel conditions (S-D distances exceed a certain threshold), the optimal packet size of our proposed Time Diversity considerably improves the energy efficiency comparing to all communication schemes in inbody channel while our previously proposed 2-hop communication has the best performance in LOS (Line-of-Sight) and NLOS (Non-Line-of-Sight) on-body channels
We investigate the impact of multipath fading on energy efficiency in all WBAN channels
Summary
Wireless Body Area Network (WBAN) is one of the wireless networking technologies having a lot of applications in healthcare, medical field, sports, military and entertainments. In this paper we extend our previous studies as follows: We first propose the energy efficiency model of Time Diversity communication in multipath fading. The closed-form expressions of the energy efficiency models of 1-hop, Cooperative, 2-hop and Time diversity communication schemes in multipath fading are explicitly derived for the above-mentioned modulation techniques further. According to the numerical results, it is clear that for poor channel conditions (S-D distances exceed a certain threshold), the optimal packet size of our proposed Time Diversity considerably improves the energy efficiency comparing to all communication schemes in inbody channel while our previously proposed 2-hop communication has the best performance in LOS (Line-of-Sight) and NLOS (Non-Line-of-Sight) on-body channels. Regarding the performance of modulation techniques, it is obvious that 16QAPM provides the maximum energy efficiency in the in-body channel for all communication schemes excluding Time Diversity communication.
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