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학술대회 NACA: A New Adaptive CSMA/CA Algorithm of IEEE 802.15.4 in Beacon-enabled Networks
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저자
송준근, 신기영, 유미선, 김진원, 마평수
발행일
200702
출처
International Conference on Advanced Communication Technology (ICACT) 2007, pp.266-269
DOI
https://dx.doi.org/10.1109/ICACT.2007.358352
협약과제
06MW1100, 임베디드 SW 기반 Smar Town 솔루션 기술 개발, 마평수
초록
In this paper, we propose a new adaptive CSMA/CA algorithm (NACA) that aims to reduce redundant transmission of IEEE 802.15.4 LR-WPAN. In Wireless Sensor Networks (WSN), energy consumption is one of the most important issues. Furthermore, it makes the network life-time longer by reducing retransmission. To achieve this goal, we improve the carrier sensing features in MAC layer of IEEE 802.15.4. When the network is busy, the MAC detects it and adaptively chooses the parameters of CSMA/CA mechanism to minimize collisions and redundancy of retransmission packet based on the NACA. We evaluated the proposed scheme with original 802.15.4 MAC on the ns-2 simulator. The results show that our scheme outperforms the original about 15% in case of retransmission.
키워드
Back-off algorithm, CSMA/CA, IEEE 802.15.4 LR-WPAN, NACA
KSP 제안 키워드
Adaptive CSMA, Back-off, CA algorithm, Carrier Sensing, IEEE 802.15.4, LR-WPAN, Mac layer, Network LifeTime, Network simulator-2(NS2), Wireless sensor networks(WSNs), energy consumption