Fig. 1From: Analyzing the impacts of node density and speed on routing protocol performance in firefighting applicationsClustering in MANETs consists of four basic elements, i.e., cluster, cluster head, ordinary node, and gateway nodes. Typically, a large network is grouped into smaller subgroups, referred to as clusters. A cluster head is chosen from among all available nodes in a cluster. It manages cluster-related activities and has access to all ordinary nodesBack to article page