In wireless body sensor system(WB-SNSs), unlike existing sensor network system, the size of device is small and amount of battery is considerably limited. And various channel environments can be made by link channel characteristic, human movements, sensor placements, transmission power control(TPC) algorithms and so on. In this paper, therefore we take diverse experiments with totally considerated environments to overcome these restrictions and to manage the energy efficiently and find the

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... of target received signal strength indicator(RSSI) based on diverse factors such as human movements, sensor placements, and TPC algorithms. And we conduct analysis in terms of energy consumption and packet delivery rate(PDR) based on the experimental results. Through these analysis, we compare and evaluate the efficiency according to setup values of Target RSSI and Target RSSI range suitable for wireless body sensor network system. ☞ keyword : sensor network, wireless body sensor network, energy consumption, transmission power control 1. 서 론 최근 우리 사회는 사물과 컴퓨터, 그리고 인간간의 융 합이 가속화되는 디지털 컨버전스 시대로 변화하고 있 다. 특히 사물과 사물, 인간과 사물간의 네트워크가 형성 되는 센서 네트워크 환경에서 유비쿼터스 센서 네트워크 (Ubiquitous Sensor Network) 기술은 디지털 융합 시대의