Optimization of Collection Tree Protocol

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Harleen Kaur
Prof. Gaurang Raval


Collection tree protocol is a tree based protocol which is mainly used for aggregation. It is minimum cost routing tree which selects the path having minimum cost routing gradient. It will generate one or more trees to root which is called base station. When any node has data it sends data up the tree which is forwarded to root.CTP will provide link quality estimation among nearby neighbours. It will indicate number of transmissions from a node to send a packet to destination and whose acknowledgment is successfully received. It sends data to root by choosing a next hop. CTP is having a problem of fast energy depletion which is caused by congestion in the network. Also energy level of the network is not highly scalable. Whenever a node in a network is failed it is not able to do the function and it should not effect on overall network. When more number of nodes are added in the network, congestion will take place and so it does not have an additional energy to choose an optimal path. In revised CTP, to enhance the energy level of a network RSSI is used in broadcast fault tolerant algorithm. RSSI means power received by antenna. CTP suffers a problem by disseminating data statically in network. So in revised CTP line mobility model is integrated which will send data dynamically to sink node.

Keywords: CTP (Collection Tree Protocol),ETX(Expected Transmission), ACK(Acknowledgement),THL(Time Has Lived), RSSI(Received Signal Strength Indicator).


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