Reliable Body Area Networks Using Relays: Restricted Tree Topology

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Chebbo, Hind; Abedi, Saied; Lamahewa, Tharaka; Smith, David; Miniutti, Dino; Hanlen, Leif


2012-01-30


Conference Material


International Conference on Computing, Networking and Communications (ICNC 2012) - International Workshop on Wireless Body Area Networks for mHealth (WiBAN 2012)


Hawaii, USA


This paper focuses on mechanisms that support the reliable transfer of data for medical applications in wireless Body Area Networks (BANs), in particular, for the monitoring by sensors of vital life signs. Recent studies on path-loss models for BANs show that for some scenarios, a Star Topology (ST), with a direct, single link between sensor and coordinator is insufficient. Thus it is beneficial to extend the ST to a Tree Topology with a restricted number of hops using relays. In this paper, we first provide an overview of relevant findings, before presenting our Restricted Tree Topology (RTT) design. Then we present an experiment that is set up to study the performance of RTT in terms of availability of connectivity, based on Received signal strength at 2.4 GHz using wearable channel sounders with various people sleeping. Our simulation results show that for certain sleeping positions, RTT improves connectivity by approximately 12% for a receiver sensitivity of -95 dBm. In addition we have shown that without RTT it is not possible to meet the reliability requirement as set out by the IEEE 802.15.6 Task Group for its draft standard.


Body Area Networks, Relay, Multihop, Tree Topology, Medical, Wireless


nicta:5180


Chebbo, Hind; Abedi, Saied; Lamahewa, Tharaka; Smith, David; Miniutti, Dino; Hanlen, Leif. Reliable Body Area Networks Using Relays: Restricted Tree Topology.[Conference Material]. 2012-01-30. <a href="http://hdl.handle.net/102.100.100/101667?index=1" target="_blank">http://hdl.handle.net/102.100.100/101667?index=1</a>



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