Control Access Point of Devices for Delay Reduction in WBAN Systems with CSMA/CA

作     者：Akinobu Nemoto Pham Thanh Hiep Ryuji Kohno 

作者机构：Department of Medical Informatics Yokohama City University Yokohama Japan Division of Physics Electrical and Computer Engineering Yokohama National University Yokohama Japan 

出 版 物：《Communications and Network》 (通讯与网络（英文）)

年 卷 期：2015年第7卷第1期

页      面：1-11页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：Standard IEEE802.15.6 Discrete Time Markov Chain Method Control Access Point Bandwidth Efficiency Delay 

摘      要：Due to the gathering of sickrooms and consultation rooms in almost all hospitals, the performance of wireless devices system is deteriorated by the increase of collision probability and waiting time. In order to improve the performance of wireless devices system, relay is added to control the access point and then the access of devices is distributed. The concentration of access point is avoided and then the performance of system is expected to be improved. The discrete time Markov chain (DTMC) is proposed to calculate the access probability of devices in a duration time slot. The collision probability, throughput, delay, bandwidth and so on are theoretically calculated based on the standard IEEE802.15.6 and the performance of the system with and without relay is compared. The numerical result indicates that the performance of the system with control access point is higher than that of the system without control access point when the number of devices and/or packet arrive rate are high. However, the system with control access point is more complicated. It is the trade-off between the performance and the complication.