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

Autor:	Ryuji Kohno, Akinobu Nemoto, Pham Thanh Hiep
Rok vydání:	2015
Předmět:	Hidden node problem Computer science business.industry Network packet Throughput General Medicine Spectral efficiency law.invention Relay law Bandwidth (computing) Wireless business Carrier sense multiple access with collision avoidance Computer network
Zdroj:	Communications and Network. :1-11
ISSN:	1947-3826 1949-2421
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e1756426e4c4e92be295501971017878 https://doi.org/10.4236/cn.2015.71001 Zobrazit plný text záznamu