Modeling On-Body DTN Packet Routing Delay in the Presence of Postural Disconnections
1 Department of Computer Engineering, Jordan University of Science and Technology, Irbid, Jordan 22110-3030, Jordan
2 Department of Electrical and Computer Engineering, Michigan State University, East Lansing, MI 48824-1226, USA
EURASIP Journal on Wireless Communications and Networking 2011, 2011:280324 doi:10.1155/2011/280324Published: 19 September 2010
This paper presents a stochastic modeling framework for store-and-forward packet routing in Wireless Body Area Networks (WBAN) with postural partitioning. A prototype WBANs has been constructed for experimentally characterizing and capturing on-body topology disconnections in the presence of ultrashort range radio links, unpredictable RF attenuation, and human postural mobility. Delay modeling techniques for evaluating single-copy on-body DTN routing protocols are then developed. End-to-end routing delay for a series of protocols including opportunistic, randomized, and two other mechanisms that capture multiscale topological localities in human postural movements have been evaluated. Performance of the analyzed protocols are then evaluated experimentally and via simulation to compare with the results obtained from the developed model. Finally, a mechanism for evaluating the topological importance of individual on-body sensor nodes is developed. It is shown that such information can be used for selectively reducing the on-body sensor-count without substantially sacrificing the packet delivery delay.