期刊名称：International Journal of Wireless & Mobile Networks
印刷版ISSN：0975-4679
电子版ISSN：0975-3834
出版年度：2013
卷号：5
期号：4
DOI：10.5121/ijwmn.2013.5406
出版社：Academy & Industry Research Collaboration Center (AIRCC)
摘要：Wireless Sensor Network (WSN) is an attractive choice for a variety of applications asnowiredinfrastructureis needed. Other wireless networks are not as energy constrained as WSNs, because theymay be plugged into the mains supply or equipped with batteries thatare rechargeable and replaceable.Among others, one of the main sources of energy depletion in WSN is communications controlled by theMedium Access Control (MAC) protocols. An extensive survey of energy efficient MAC protocols ispresented in this article. We categorise WSN MAC protocols in the following categories: controlled access(CA), random access (RA), slotted protocols (SP) and hybrid protocols (HP). We further discuss howenergy efficient MAC protocols have developed from fixed sleep/wake cycles through adaptive to dynamiccycles, thus becoming more responsive to traffic load variations. Finally we present open researchquestions on MAC layer design for WSNs in terms of energy efficiency
关键词：Wireless sensor networks; MAC protocols; Energy c;onservation
