MA Bin, LIAO Xiao-feng, XIE Xian-zhong. Proactive Spectrum Handover Based on Packet Scheduling Algorithm in Cognitive Radio Networks[J]. Acta Electronica Sinica, 2013, 41(8): 1628-1633.
spectrum handover occurs when a secondary user changes frequency due to the appearance of a primary user.Proactive spectrum handover may result in aggraded bandwidth utilization performance and degraded packet loss probability.Here
we develop a proactive spectrum handover mechanism by using an efficient packet scheduling algorithm
to reduce unusable channel.It effectively integrates two algorithms:spectrum hole filling algorithm and packet migration algorithm
to minimize packet loss probability and reduce the bandwidth fragment.The efficiency of the mechanism is validated by simulation results.