A Two-Layered Clustering-Based Multihop Routing Protocol

This paper studies clustering load balance and routing protocol in Wireless Sensor Networks (WSNs). After improve RDCA clustering algorithm, we present a Two-Layered Clustering-Based MultiHop Routing Protocol (TLCBMH). Unlike RDCA, TLCBMH uses two different communication radiuses, low radius and high radius. Low radius is the cluster radius. High radius is the transmission power radius which cluster heads use to search for spare cluster heads. High radius is double of low radius. That fits more application environment of WSNs. After the clustering, cluster heads in RDCA communicate direct with the base station. The cluster heads in TLCBMH access to the base station through multihop. It deals with failed nodes at the initialization period of every work round, which makes WSNs more robust. Compared with RDCA, network simulation proves TLCBMH does not loss any clustering ability. However, it promotes WSNs average lifetime.