Present State-of-the-Art of Continuous Neighbor Discovery in Asynchronous Wireless Sensor Networks

In this paper, we reviewed the literature on various techniques found in WSN for neighbor discovery. Neighbor discovery is a fundamental phenomenon in the network in the deployment phase. However, due to the dynamic nature of WSN, and there are possibilities of adding new nodes and removing nodes from the network, continuous neighbour discovery is needed. It does mean that neighbour discovery is not a one-time task. With neighbour discovery, there are many advantages to WSN. The efficiency of the network is improved besides saving the energy of nodes and increasing the lifetime of nodes. The review of the literature made in this paper provides useful insights on the present state of the art of continuous neighbour discovery in WSN. It also provides research gaps found in the literature.