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http://dx.doi.org/10.7840/KICS.2011.36B.10.1200

A Node-Grouping MAC Protocol in Delay-Tolerant Underwater Acoustic Sensor Networks  

Cheon, Jin-Yong (경북대학교 대학원 전자전기컴퓨터학부)
Son, Kweon (국방과학연구소)
Jang, Youn-Seon (충남대학교 전자전파정보통신공학과)
Cho, Ho-Shin (경북대학교 IT대학 전자공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.36, no.10B, 2011 , pp. 1200-1209 More about this Journal
Abstract
In this paper, we propose a novel energy efficient MAC protocol which is based on orthogonal frequency division multiple access (OFDMA) and exploits the physical characteristic that propagation loss of acoustic wave depends on the distance. In the proposed scheme, sensor nodes are grouped according to the distance to sink node. Then, each group uses a different frequency band. The proposed scheme not only enables all sensor nodes to maintain the signal-to-noise ratio above a certain required level (Accepted Minimum SNR, AMS), but also reduces overall transmission power consumption. In addition, the dynamic sub-channel allocation is employed in order to improve data transmission rate. Simulations show that proposed MAC protocol has better performance in a delay-tolerant underwater acoustic sensor networks.
Keywords
OFDMA; UWASNs (Underwater Acoustic Sensor Networks); MAC;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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