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http://dx.doi.org/10.9708/jksci/2012.17.12.121

Study on Wireless Body Area Network System Design Based on Transmission Rate  

Park, Joo-Hee (Dept. Medical Information System, Sahmyook Health University)
Publication Information
Journal of the Korea Society of Computer and Information / v.17, no.12, 2012 , pp. 121-129 More about this Journal
Abstract
In this paper, we proposed WBAN system model to management an application that requires low rate data transfer in IEEE 802.15.4. We have to use different wireless sensor network technology to transfer different date rate and emergency message in medical application service. A suitable system model for WBAN and a WBAN MAC protocol in order to solve these existing system problems are proposed. Firstly, the priority queuing was applied to contention access period, and the system model which could guarantee transmission of a MAC command frame was proposed. Secondly, the MAC frame was newly defined to use the system model which was proposed above. Thirdly, WBAN CSMA/CA back-off algorithm based on data transmission rate was proposed to enhance data throughput and transmission probability of the data frame which does not have priority in the proposed WBAN system. The proposed algorithm is designed to be variable CSMA/CA algorithm parameter, depending on data rate. For the evaluation of WBAN CSMA/CA algorithm, we used Castalia. As a result of the simulation, it is found that the proposed system model can not only relieve loads of data processing, but also probability of collision was decreased.
Keywords
IEEE 802.15.4; CSMA/CA; WBAN; WPAN; WSN;
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