Cluster Based Multi-tier MAC Protocol for Dense Wireless Sensor Network

문지환; 장태무

Journal of The Korea Society of Computer and Information

Abbr : JKSCI
2011, 16(2), pp.101-112
Publisher : The Korean Society Of Computer And Information
Research Area : Computer Science

문지환 ¹, 장태무 ²

¹동국대학교
²동국대학교

ABSTRACT

A new MAC protocol, MT-MAC(Multi-Tier Medium Access Control) by name, is proposed for dense sensor networks. Depending on the density of nodes in a virtual cluster, the cluster header performs the splitting to several tiers in nodes of virtual cluster. MT-MAC split the tiers to use modfied-SYNC message after receiving the beacon message from the cluster header. Because only the sensor nodes in the same tier communicate each other, less power is consumed and longer network life time is guaranteed. By a simulation method with NS-2, we evaluated our protocol. In dense nodes environments, MT-MAC protocol shows better results than S-MAC in terms of packet delivery rates throughput and energy consumption.
KEYWORDS

wireless sensor networks, dense wireless sensor network, energy efficiency, medium access control
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