*3.2.4 Duty cycling*

For energy conservation, duty cycling is one of the important techniques in WSNs. In duty cycling, the radio transceiver mode of sensor node is changing between active and sleep. This technique requires cooperative coordination between nodes for communication. Nodes want to communicate with each other and the nodes will shift from sleep mode to wake-up mode. A node must wait for its neighbor nodes to awake for communication. Sleep latency is increased due to this. Multi-hop broadcasting is complex in this technique because all the neighboring nodes are not active at the same time.
