Schedule unifying algorithm extending network lifetime in S-MAC-based wireless sensor networks

Authors:
Woonsik Lee;Minh Viet Nguyen;Arabinda Verma;Hwang Soo Lee
Affiliations:
Korea Advanced Institute of Science and Technology, Daejeon, Korea;Korea Advanced Institute of Science and Technology, Daejeon, Korea;Korea Advanced Institute of Science and Technology, Daejeon, Korea;Korea Advanced Institute of Science and Technology, Daejeon, Korea
Venue:
IEEE Transactions on Wireless Communications
Year:
2009

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Abstract

In S-MAC-based sensor networks, border nodes consume more energy since they follow multiple listen and sleep schedules. Therefore they switch into the listen state frequently and reduce the network lifetime. This paper proposes a simple but powerful algorithm, termed the Schedule Unifying Algorithm (SUA), to minimize energy consumption of border nodes by unifying multiple listen and sleep schedules into a single unified schedule. The simulation results show that SUA incorporated S-MAC-based nodes consume less energy, thereby extending the network lifetime approximately 2 times more.