Performance of IR-UWB cross-layer ranging protocols under on-body channel models with body area networks
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- 作者：Arturo Guizar ; Claire Goursaud ; Jean-Marie Gorce
- 关键词：Wireless body area networks ; Ultra wideband ; Cooperative communications ; Localization ; Motion capture ; IEEE 802.15.6 ; TDMA ; Scheduling
- 刊名：Annals of Telecommunications
- 出版年：2016
- 出版时间：October 2016
- 年：2016
- 卷：71
- 期：9-10
- 页码：453-463
- 全文大小：2,547 KB
- 刊物类别：Engineering
- 刊物主题：Engineering, general
Electronic and Computer Engineering - 出版者：Springer Paris
- ISSN：1958-9395
- 卷排序：71
文摘
This paper deals with the positioning performance of the 3-Way ranging protocol (3-WR) in a wireless body area network (WBAN). The purpose is to propose a new cooperative algorithm to improve the number of estimated positions with a conditional permutation of the on-body anchors. To do so, we first evaluate and analyze the positioning success rate under a realistic mobility scenario and using two scheduling strategies: Broadcast single node localization (P2P-B) and aggregated and broadcast (A&B)) with a medium access control (MAC) layer based on time division multiple access (TDMA). The 3-WR estimates the distance between two nodes placed on the body with the transmission of three packets. The wireless transmission is based on impulse radio ultra wideband (IR-UWB). However, these transactions can be lost through the WBAN channel leading into a “bad positioning service.” We consider a physical layer based on IR-UWB with three different channels: (1) an empirical theoretical model based on the on-body CM3 path loss channel (Anechoic chamber), (2) a simulated channel calculated by ray-tracing with the PyLayers simulator, and (3) an experimental channel model obtained by measurements. Our results show that the channel affects the positioning success rate that decreases as a function of the sensitivity threshold at the receiver. This can be solved with long and short term analysis for the choice of virtual anchors to increase the positioning performance.