Neighbour Discovery in Cognitive Radio Networks using Blockchain: Issues & Challenges

Cognitive radio networks (CRNs) is an advanced networking paradigm that solves the spectrum scarcity problem of traditional wireless networks. CRN is recognised as the natural extension of traditional wireless networks. The major components of CRNs include primary users (PU), secondary users (SU), and spectrum holes. In CRNs, the SU nodes are making connections among each other in order to form the networks topology. Therefore, the neighbour discovery is a fundamental problem of CRNs. The neighbour discovery protocol has several challenges that can impact network performance, security, and scalability. The present works conducts a study of blockchain based neighbour discovery for cognitive radio network. The neighbour discovery is deals with to allow devices to discover and communicate with nearby devices. There are various uses of neighbour discovery in cognitive radio networks such as network formation, sharing spectrum sensing information, resource allocation etc. The blockchain techniques can make the neighbour discovery protocol reliable and secure. The paper includes the issues and challenges while performing neighbour discovery. Also, we highlight key advantages of using blockchain technology.