• Title/Summary/Keyword: LEEM

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REMARKS ON FIXED POINT THEOREMS

  • Jiang, Guo-Jing;Kang, Shin-Min
    • East Asian mathematical journal
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    • v.16 no.2
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    • pp.175-181
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    • 2000

  • In this paper we show fixed point theorems related with the diameter of orbit on metric spaces. The results presented in this paper extend, improve and unify the results of $Heged\"{u}s$ [1], Kim, Kim, Leem and Ume [2], Kim and Leem [3], Ohta and Nikaido [4] and $Taskovi\'{c}$ [5].

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A scheme of EEMR protocol for energy efficient in wireless sensor networks (EEMR 프로토콜을 이용한 무선 센서 네트워크 노드의 에너지 소비 절감 방법)

  • Cho, Ik-Lae;Lee, Ho-Sun;Lee, Kyoon-Ha
    • Journal of the Korea Society of Computer and Information
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    • v.10 no.4 s.36
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    • pp.229-237
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    • 2005

  • One of the important issues of in this research is effective usage of energy to increase life time of nodes which form a network. Existing LEEM protocol causes unnecessary active time due to small packets with shorter transfer time than active interval period of node and packets with transfer time of more than twice of active interval period of node. In this paper, we propose Energy-Efficient MAC by Reservation (EEMR) protocol which can increase energy effectiveness in wireless sensor network environment by reducing unnecessary active time using a method that reserves next-hop depend upon the size of packet. We evaluated effectiveness of our proposed method through experiments. The result showed that using EEMR protocol had better energy effectiveness than existing LEEM protocol by 15%.

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