Cooperative Relaying Channel and Outage Performance in Narrowband Wireless Body Area Network

Karma WANGCHUK  Minseok KIM  Jun-ichi TAKADA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E98-B   No.4   pp.554-564
Publication Date: 2015/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E98.B.554
Type of Manuscript: Special Section PAPER (Special Section on Innovation of Medical Information and Communication Technology for Dependable Society)
Category: 
Keyword: 
body area network,  multi-link channel,  cooperative communication,  incremental relaying,  outage probability,  

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Summary: 
To improve the outage performance of a wireless body area network (BAN), exploitation of the diversity in the channel obtained by letting different nodes cooperate and relay signals for each other is an attractive solution. We carry out multi-link channel measurements and modeling for all realistic locations of the on-body sensor nodes and for three different motion scenarios in a typical office environment to develop equivalent channel model for simple and practical cooperative transmission schemes. Using the developed model the performance of the transmission schemes are evaluated and compared. Incremental decode and forward relaying is found to be consistently better than the other schemes with gains of up to 16dB at 10% outage probability, and an average gain of more than 5.9dB for any location of the coordinator node. The best location of the coordinator node based on the performance is also determined. Such insights will be very useful in designing BANs.