Abstract:
본 발명은 DutyCycle기반의 MAC 프로토콜에서 채널 환경에 따라 Wakeup period(구간 또는 기간)를 동적으로 가변화시키는 방법에 관한 것으로, DutyCycle의 Wakeup 구간에서 체크한 채널 상태를 근거로 이웃 노드의 트래픽을 카운트하여, 상기 카운트된 이웃노드의 트래픽에 따라 동일 Duty Cycle내에서의 Wakeup 구간을 동적으로 가변시킴으로써 수신 성공률 및 에너지 효율을 향상시킬 수 있다.
Abstract:
PURPOSE: A monitoring sensor network system and a control method are provided to supply a low power operation method and a communication protocol appropriate for a limited number of nodes, a wide arrangement interval between nodes, a requirement for a long operation time, etc. CONSTITUTION: A relay node(200) controls a short-distance wireless frequency state or a long-distance wireless frequency state for data transmission. The relay node receives detection information transmitted from a sensor node. The relay node transmits the received detection information. A C2 terminal(300) receives the detection information transmitted from the relay node. The C2 terminal analyzes the received detection information. The C2 terminal outputs an analyzed result. [Reference numerals] (100) Sensor node; (200) Relay node; (300) C2 terminal;
Abstract:
PURPOSE: A system and a method for efficiently sensing an intruder are provided to maintain accuracy while minimizing power required for the maintenance of the system. CONSTITUTION: A sensor node(100) of an invasion detecting system comprises an intruder detecting sensor(110) and a position detecting sensor(120). The intruder detecting sensor senses an intruder within a constant distance. The position detecting sensor is driven when the intruder is detected and confirms the location of the intruder.
Abstract:
A target following clustering algorithm of the present invention generates or eliminates a cluster dependently following a target when detecting the target in surveillance reconnaissance applications, thereby sensitively responding to motions of the target even when traffic of a wireless sensor network bursts locally by the detected target. Also, it is possible to improve energy efficiency since both a boundary problem and a blackhole can be resolved. Moreover, the target following clustering algorithm reduces costs of system maintenance in the military with weak electricity infrastructures and has high applicability by reducing energy consumption in the wireless sensor network and prolonging the lifetime, namely, duration time of the network.