유비쿼터스 센서 네트워크를 위한 에너지 효율적 MAC 프로토콜
An Energy Efficient MAC Protocol for Ubiquitous Sensor Networks
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초록
본 논문에서는 유비쿼터스 센서 네트워크의 특성과 기존에 연구되어 왔던 여러 주제들에 대해 살펴보고, 그 중 에너지 효율적 통신 기법에 대해 보다 자세히 고찰한다. 특히 무선 센서 네트워크의 센서 네트워크의 에너지 효율성을 증대시키기 위해 제안되었던 S-MAC 프로토콜 등 기존의 여러 MAC 계층 알고리즘들의 성능을 더욱 향상시킬 수 있는 새로운 프로토콜, TEEM(Traffic aware, Energy Efficient MAC)을 제안한다. TEEM 피로토콜은 "적응적 Listen 주기"와 "RTS 패킷 피기백(Piggyback)" 기법을 통해 기존 MAC 프로토콜의 불필요한 통신 에너지 소모 요소를 극복한 에너지 효율적 프로토콜이다. 본 논문에서는 TEEM을 실제 센서 노드인 Mica Mote에 직접 구현하여 대표적인 기존 MAC 프로토콜(S-MAC, CSMA/CA like 802.11)들과 비교함으로써 그 효율성을 증명하였다.
Abstract
In this paper, we study the main characteristics and key research issues in the area of Ubiquitous SensorNetworks (USN). Especially, we focus more on the issue of energy efficient communication including its wireless MAC and Routing layer issues. In order to improve energy efficiency in the MAC layer, we propose a new MAC protocol for sensor netwkorks, named as TEEM (Traffic aware, Energy Efficient MAC) protocol. Inspired by S-MAC protocol that is probably the most well-known sensor MAC scheme for energy efficiency, the proposed TEEM is also based on the concept of "listen/sleep mode cycle." However, unlike the S-MAC where the duration of listen and sleep modesare fixed, our TEEM protocol makes these durations adaptive by utilizing the two novel approaches of of "adaptive listen period" and "RTS piggybacking," and hence achieves a significant decrease in power consumption. Through an implementation and testing in Motes sensors (i.e., real sensor node platforms), the presented TEEM is evaluated and compared to S-MAC as well as CSMA/CA (like IEEE 802.11) protocols.
참고문헌 (18)
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- "유비쿼터스 센서 네트워크를 위한 에너지 효율적 MAC 프로토콜 336"