DEFECTIVE NODE DETECTION IN WSN USING ROUND TRIP DELAY AND PATH

WIRELESS NETWORK

From last few years back, function of wireless sensor networks (WSNs) have been increased tremendously due to its vast potential to connect the physical world to the virtual world. Also its manufacturing cost and an advance in microelectronic fabrication technology reduces efforts to portability. It becomes a trend to apply the more numbers of portable wireless sensors In WSNs to increase the quality of service (QoS).Tha main objective of such WSN is QoS improvement The QoS of such WSNs is mainly affected by the failure of sensor nodes. As soon as no.of sensor nodes increases chances of sensor node failure increases. In order to maintain the better QoS under deficient conditions, identifying and detaching such faults are essential,so as to work remaining WSN more clearly. In the proposed method, We are detecting faulty node by measuring the round trip delay (RTD) time of discrete round trip paths (RTP)and comparing them with threshold value when whole network is in working. In this we are experimenting on two sensor nodes and one control unit(Master Node), communication among these nodes is established through Zigbee based wireless technology.

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