International Journal of Computer Applications
Data aggregation is an effective technique in Wireless Sensor Network (WSN) because it reduces the number of packets to be sent to sink and increases the lifetime of sensor network by aggregating the similar packets. This technique uses cluster method and clustering has been shown to improve network lifetime, reduce network traffic and the contention for the channel. There are certain drawbacks in the cluster method. The master node is a single point of failure and if a master node fails then the entire sub network fails. To make a WSN successfully operate mater failures or malicious attacks are to be avoided.