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A Novel Opportunistic Greedy Forwarding Scheme in Wireless Sensor Networks
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  • A Novel Opportunistic Greedy Forwarding Scheme in Wireless Sensor Networks
  • A Novel Opportunistic Greedy Forwarding Scheme in Wireless Sensor Networks
저자명
Bae. Dong-Ju,Choi. Wook,Kwon. Jang-Woo,Choo. Hyun-Seung
간행물명
KSII Transactions on internet and information systems : TIIS
권/호정보
2010년|4권 5호|pp.753-775 (23 pages)
발행정보
한국인터넷정보학회
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정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Greedy forwarding is a key mechanism of geographic routing using distance as a metric. As greedy forwarding only uses 1-hop neighbor node information, it minimizes routing overhead and is highly scalable. In existing greedy forwarding schemes, a node selects a next forwarding node based only on the distance. However, the signal strength in a realistic environment reduces exponentially depending on the distance, so that by considering only the distance, it may cause a large number of data packet retransmissions. To solve this problem, many greedy forwarding schemes have been proposed. However, they do not consider the unreliable and asymmetric characteristics of wireless links and thus cause the waste of limited battery resources due to the data packet retransmissions. In this paper, we propose a reliable and energy-efficient opportunistic greedy forwarding scheme for unreliable and asymmetric links (GF-UAL). In order to further improve the energy efficiency, GF-UAL opportunistically uses the path that is expected to have the minimum energy consumption among the 1-hop and 2-hop forwarding paths within the radio range. Comprehensive simulation results show that the packet delivery rate and energy efficiency increase up to about 17% and 18%, respectively, compared with the ones in PRR${ imes}$Distance greedy forwarding.