Spectrum Sensing Based Heed Routing Performance Enhancement Strategy for Cognitive Radio Sensor Networks

The paper formulates the cluster based (Hybrid Energy Efficient Distribution) HEED routing strategy for cognitive radio sensor networks (CRSN) using the principles of spectrum sensing. The theory of spectrum sensing enables the secondary users to effectively use the vacant channels and ensure a sense of protection for the primary users. Though heterogeneous co-operative spectrum sensing periodically increases the throughput of the network, still it necessitates measures for improving the other performance indices. The focus relates to reducing the spectrum sensing duration with a view of maximizing the time for data transmission. The attempts reiterate to extract an efficient solution through hybrid sequential and parallel channel sensing (CS) technique for routing the information. The efforts bring out the benefits in terms of the parameters that include throughput, energy, packet loss, delay and overhead through a comparative study with CS- LEACH and CS-AODV routing schemes. The results obtained in the NS2 platform allow it to claim a place for the use of CS-HEED in real world applications.