Fig. 2
From: Hybrid energy-efficient APTEEN protocol based on ant colony algorithm in wireless sensor network
ADCAPTEEN network model. The ADCAPTEEN network model consists of CM, MCH, VCH, and sink node in four parts. In each cluster, a MCH and a VCH are selected. The CM is responsible for collecting and transmitting data to the MCH. The MCH collects and merges the data, sends the converged data to the VCH of the cluster, and the VCH forwards the data to the sink node at a far distance