에너지 하베스팅 무선센서 네트워크를 위한 전송량 할당을 통한 재전송
Retransmission with Transmission Quantity Allocation for Energy Harvesting Wireless Sensor Networks
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초록
무선 센서 네트워크에서는 배터리를 사용하여 수명이 제한적이고 싱크 주변에 데이터 전송이많아 핫스팟 문제가 발생한다. 이를 해결하기 위해 자식 노드에게 데이터 수집량을 할당하여 전송량을 제한하는 방법을 사용한다. 그러나 이 방법은 싱크 노드에서 먼 노드의 에너지 남는 문제와 데이터 전송 오류 시 할당된 양만큼 전송되지 않는 문제가 존재한다. 본 논문에서는 이러한문제를 해결하기 위해 부모 노드가 자식 노드에게 데이터 전송 양을 할당하여 전송량을 제한하는환경에서, 재전송을 통한 오류 복구로 센서 데이터 손실을 방지하는 방법을 제안한다. 이때 각 센서 노드가 할당받은 데이터 전송량과 에너지의 한계를 넘지 않게 재전송량을 결정하고, 여분의에너지로 오류를 복구하도록 한다. 시뮬레이션 결과, 제안된 기법이 데이터 전송 오류를 효과적으로 복구하여 데이터를 효율적으로 수집함을 확인했으며, 결과적으로 싱크 노드 및 주변 노드의에너지 고갈을 최소화하고 데이터 수집률이 증가함을 알 수 있다.
Abstract
In wireless sensor networks, batteries limit lifespan, and heavy data transmission around the sink causes the hotspot problem. To address this, data collection amounts are allocated to child nodes to limit transmission. However, this approach has issues with nodes far from the sink having excessive energy and failing to transmit the allocated amount due to data transmission errors. This paper proposes a method to prevent sensor data loss through error recovery via retransmission. The method ensures that each node's retransmission volume stays within its allocated data amount and energy limits, using excess energy for error recovery. Simulations show that this technique effectively recovers data transmission errors, collects data, minimizes energy depletion around the sink, and increases data collection rates.
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