Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: IResearch Article Modeling On-Body DTN Packet Routing Delay in the Presence of Postural Disconnections | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2011 Article ID 280324 19 pages doi 2011 280324 Research Article Modeling On-Body DTN Packet Routing Delay in the Presence of Postural Disconnections Muhannad Quwaider 1 Mahmoud Taghizadeh 2 and Subir Biswas2 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 Correspondence should be addressed to Subir Biswas sbiswas@ Received 25 April 2010 Revised 19 August 2010 Accepted 17 September 2010 Academic Editor Sergio Palazzo Copyright 2011 Muhannad Quwaider et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 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 .
