Characteristic of sensor node:
– limited computational ability
– memory constraint
– lack of power resource

– consist of 10 -1000 of sensor nodes
– communicate through wireless channel for data gathering and processing

using AA batteries must consume less than 200µA to last for a year
– form network by communicate with each other either directly or through mean of other neighboring nodes (multihop)

Environment monitored:
– targeted to be allocated in rural area (which may not be subject to tempering)
– no existing infrastructure for either energy or communication(backbone)
– SN will be expected to be battery equipped


– large no. of distributed nodes

– unpredictable nature (hard to change or recharge the batteries during operational time)

– communication is the main power consumption
– once deployed show strong dependency on battery lifetime (can only operate while battery power is adequate)

– routing algorithm: task of finding the optimal path based on certain criteria –> the energy

– aim at creating a routing protocols that can efficiently send data without wasting the energy resource

– How well the WSN can collect data depend on the energy resource and network routing
– It proves that lifetime of SN will affect data routing in WSN which also have a direct relation with the efficient performance of the network