Journal of KIISE:Computer Systems and Theory (한국정보과학회논문지:시스템및이론)

Korean Institute of Information Scientists and Engineers (한국정보과학회)
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An Adaptive Storage System for Enhancing Data Reliability in Solar-powered Sensor Networks

태양 에너지 기반 센서 네트워크에서 데이터의 안정성을 향상시키기 위한 적응형 저장 시스템

  • 노동건 (일리노이대학교 컴퓨터과학과)
  • Published : 2009.10.15
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Abstract

Using solar power in wireless sensor networks requires a different approach to energy optimization from networks with battery-based nodes. Solar energy is an inexhaustible supply which can potentially allow a system to run forever, but there are several issues to be considered such as the uncertainty of energy supply and the constraint of rechargeable battery capacity. In this paper, we present SolarSS: a reliable storage system for solar-powered sensor networks, which provides a set of functions, in separate layers, such as sensory data collection, replication to prevent failure-induced data loss, and storage balancing to prevent depletion-induced data loss. SolarSS adapts the level of layers activated dynamically depending on solar energy availability, and provides an efficient resource allocation and data distribution scheme to minimize data loss.

태양 에너지 기반 센서 네트워크는 배터리 기반과는 다른 에너지 최적화 기법이 필요하다. 태양 에너지는 주기적으로 계속해서 공급되므로, 기본적으로는 센서 시스템을 영원히 동작하게 할 수 있지만, 공급되는 에너지양의 불확실성과 이를 저장하는 배터리의 용량 제한 등 고려해야 할 사항이 많다. 이 논문에서 우리는 태양 에너지 기반 센서 네트워크를 위한 안정적인 스토리지 시스템인 SolarSS를 제안한다. SolarSS는 계층적인 구조로 되어 있는데 각 계층마다 센싱 데이터의 수집, 노드 고장으로 인한 데이터 손실을 줄이기 위한 데이터 복제, 그리고 리소스 고갈로 인한 데이터 손실을 줄이기 위한 데이터 균등화 기능이 포함되어 있다 특히, 우리 시스템은 사용 가능한 에너지의 양에 따라 활성화/비활성화 되는 계층을 동적으로 결정하고, 데이터의 손실을 최소화하기 위한 효율적인 리소스(에너지 및 저장 공간) 할당 기법과 데이터 분배 기법을 제공한다.

Keywords

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