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High Energy Efficiency and Spectral Efficiency Analysis in CRN Based Spectrum Aggregation




Data Transmission Delay, Priority Queue, End to End Delay, Multilevel Priority


Scheduling different types of packets, such as real time and non-real-time data packets, at sensor nodes with resource constraints in Cognitive radio sensor networks (CRN) is of vital importance to reduce sensors’ energy consumptions and end-to-end data transmission delays. Most of the existing packet-scheduling mechanisms of CRN use First Come First Served (FCFS), non-preemptive priority and preemptive priority scheduling algorithms. Propose a Dynamic Multilevel Priority (DMP) packet scheduling scheme. In the proposed scheme, each node, except those at the last level of the virtual hierarchy in the zone based topology of CRN, has three levels of priority queues. Real-time packets are placed into the highest-priority queue and can preempt data packets in other queues. Non-real-time packets are placed into two other queues based on a certain threshold of their estimated processing time. Leaf nodes have two queues for real-time and non-real-time data packets since they do not receive data from other nodes and thus, reduce end to end delay. We evaluate the performance of the proposed DMP packet scheduling scheme through simulations for real-time and non-real-time data. Simulation results illustrate that the DMP packet planning theme outperforms standard schemes in terms of average information waiting time and end-to-end delay.

Other Details

Paper ID: IJSRDV5I41229
Published in: Volume : 5, Issue : 4
Publication Date: 01/07/2017
Page(s): 1054-1058

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