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PSHO-HF-PM: An Efficient Proactive Spectrum Handover Mechanism in Cognitive Radio Networks

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In the paper, we develop an efficient proactive spectrum handover mechanism by using packet scheduling algorithm, called PSHO-HF-PM, to reduce unusable channel. It effectively integrates several mechanisms (hole filling and packet migration) to reduce the bandwidth fragment and support QoS. Its basic idea is in that a new packet is scheduled by migrating some packets to other channels if none of holes in any channels can accommodate it; otherwise repeating the above processes after random waiting time. Meanwhile under an effective data structure, such as the balanced binary search tree, its computational complexity will be \(O(2n\log n)\) at most. In the proposed packet scheduling algorithm, packet migration plays a key role in the improvement of bandwidth efficiency and QoS. We also evaluate the performance of total service time for proactive spectrum handover mechanism based on a Preemptive Resume Priority M/G/1 queuing network model. The performance analysis and simulation results show that it performs much better than other proactive and reactive handover mechanism in collision rate, total service time, packet loss probability and bandwidth fragment ratio.

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Author information

Correspondence to Bin Ma.

Additional information

This work was supported in part by the National Natural Science Foundation of China under Grant Nos. 61271259, 61301123, the Science & Technology Research Program of the Municipal Education Commission of Chongqing of China under Grant No. KJ130536, and the Natural Science Foundation of Chongqing of China under Grant No. CSTC2014jcyjA1016, and the Foundation of Chongqing Key Laboratory of Computer Network and Communication Technology of China under Grant No. CY-CNCL-2010-02.

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Ma, B., Xie, X. & Liao, X. PSHO-HF-PM: An Efficient Proactive Spectrum Handover Mechanism in Cognitive Radio Networks. Wireless Pers Commun 79, 1679–1701 (2014). https://doi.org/10.1007/s11277-014-1952-3

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  • Cognitive radio networks
  • Spectrum handover
  • Packet scheduling