SP-MAC: A Media Access Control Method Based on the Synchronization Phenomena of Coupled Oscillators over WLAN

Hiroyasu OBATA  Ryo HAMAMOTO  Chisa TAKANO  Kenji ISHIDA  

IEICE TRANSACTIONS on Information and Systems   Vol.E98-D   No.12   pp.2060-2070
Publication Date: 2015/12/01
Publicized: 2015/09/15
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2015PAP0004
Type of Manuscript: Special Section PAPER (Special Section on Parallel and Distributed Computing and Networking)
Category: Wireless System
wireless LAN,  SP-MAC,  synchronization phenomena of coupled oscillators,  Kuramoto model,  media access control,  

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Wireless local area networks (LANs) based on the IEEE802.11 standard usually use carrier sense multiple access with collision avoidance (CSMA/CA) for media access control. However, in CSMA/CA, if the number of wireless terminals increases, the back-off time derived by the initial contention window (CW) tends to conflict among wireless terminals. Consequently, a data frame collision often occurs, which sometimes causes the degradation of the total throughput in the transport layer protocols. In this study, to improve the total throughput, we propose a new media access control method, SP-MAC, which is based on the synchronization phenomena of coupled oscillators. Moreover, this study shows that SP-MAC drastically decreases the data frame collision probability and improves the total throughput when compared with the original CSMA/CA method.