A Study on a Class of Improved Methods on Spectrum Handoff Based on Spectrum Reservation
Yifei Wei · Journal of Beijing Union University · 2012
In cognitive radio networks,secondary users can utilize the idle spectrum of primary users,and these secondary users have to vacate current channel while primary user appears in the occupied spectrum.In this paper,the spectrum handoff theory and the two kinds of existing spectrum handoff mechanism are examined;after that some improvements and comparisons to the above mechanism are made,and then the handoff flow diagram is designed.Simulation result shows that the improved mechanism can keep a better handoff delays and can effectively reduce the handoff probability.