Efficient reorganization of a multi-hop wireless body area network

AshEse Journal of Engineering                                                                  

Vol. 1(2), pp. 008-015, June, 2015

© 2015 AshEse Visionary Limited

ISSN 2397-0677

 

Full Length Research

Sivaramakrishnan Vaidyanathan, Suryadip Chakraborty* and Dharma P. Agrawal  
Center of Distributed and Mobile Computing, Department of Electrical Engineering and Computing Systems  University of Cincinnati Cincinnati, OH-45220-0030, USA  
*Corresponding author. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.  
Received January, 2015; Accepted May, 2015  
 
Wireless body area networks (WBANs) present a new solution to remote health monitoring. In a non-invasive WBAN deployment, the sensor nodes are implanted on the human body. These devices monitor health parameters such as body temperature, pressure, insulin levels, etc. A coordinator node is placed on body surface that collects information. The sensor nodes communicate monitored health parameters to the coordinator and the coordinator collects the data and forms an interface to other networks. An important concern here is the issue of network topology reorganization due to movement of body parts that enables sensor nodes to be mobile. A network topology reorganization scheme for WBANs is presented here that employs a tree based routing scheme wherein sensor nodes form a tree topology to communicate with the coordinator using one or more hops. In each hop, a node transfers the data with its immediate parent, and the data reaches the coordinator (root of the tree) in a finite number of hops. Here, the position of the mobile sensor nodes placed on body-parts (example, limbs- arms or legs), changes with respect to other nodes. This results in disruptions in communication or deterioration of received signal quality and therefore there is a need to reorganize the network topology. The proposed mechanism adapts the Zigbee network repair technique that accounts for the network topology restructuring. The proposed scheme ensures freedom from loops with reduced network repair time. It also accommodates dynamic changes in the network topology and thereby enables the network to scale in.  
 
Key words: Wireless body area networks (WBANs), topology reorganization, zigbee, topology restructuring and network repair time 
 

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