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Energy Efficient Reliable Routing through Dynamic Spectrum Management in Cognitive Radio Sensor Networks

Cognitive Radio (CR) offers promising solution for spectrum scarcity problem by means of Dynamic Spectrum Management. Routing in Wireless Sensor Networks (WSNs) was a very big issue because of opportunistic access of spectrum band as well as dynamic variable change in environment. Previous research on routing in WSNs are centralized or distributed, but these techniques do not provide high reliability in routing Highly Delay Sensitive Data (HDSD). Instead, it increases the packet delay, interference, spectrum handoffs, as well as increase in energy consumption. In this paper, we developed an Energy Efficient Reliable Routing (EERR) protocol for Cognitive Radio Sensor Networks (CRSN) that routes the HDSD in a highly reliable manner through cognitive radio sensor nodes using licensed bands to meet the delay bound of an application, and also it sets up a quality routes by using the proper channel allocation technique in a dynamic variable environment. This routing protocol balances the energy consumption problem, eliminates conflicts between the nodes, reduces the routing overhead and channel interference, divides the traffics over different channels and time slots.