A channel assignment algorithm for Cognitive Radio wireless sensor networks

Cognitive Radio (CR) is a promising technology for improving spectrum utilization in wireless computer networks. Cognitive radio has the ability to sense the spectrum, decide the vacant bands and use of these available bands in an opportunistic approach. Cognitive Radios can be used in both licensed and unlicensed bands. In this case, the licensed wireless users (Primary Users) are a priority for using allocated band. Cognitive radio users (Secondary Users) are allowed to access the channel, if they do not cause interference in the performance of PU. So, Channel management is an important factor on system performance. In cognitive radio sensor network (CRSN), a wireless sensor network (SU) has been merged with a primary system such as mobile network as a cognitive scheme. Because of power constraints in wireless sensor network (WSN), channel management algorithms should be designed for decreasing power consumption. In this paper, a novel channel assignment algorithm for cognitive radio sensor network is proposed and its performance on two power consuming functions include spectrum handoff and users collision is explored.