무선 센서 네트워크의 클러스터 내 전송을 위한 노드 밀도 기반 트랜스포트 프로토콜

Abstract

In wireless sensor networks (WSNs), a transport protocol plays an important role of reliable transmission and congestion control. The efficient design of a transport protocol contributes to energy conservation as well as performance improvement in WSNs. In particular, an efficient congestion control protocol is necessarily required for reliable transmission and energy saving. In this thesis, a node-density-aware transport protocol (NDTP) for intra-cluster transmissions in WSNs is proposed, which takes node density into account to mitigate congestion in intra-cluster transmissions. Because cluster heads do more works and consume more energy than normal sensor nodes, the maximum active time and queue length of cluster heads are restricted to reduce energy consumption in NDTP. According to the performance evaluation results, the proposed NDTP significantly outperforms the conventional protocol in terms of network lifetime, congestion frequency, and packet error rate.