Research on time prediction based multi-hop spectrum handoff algorithm
Ning Guoqi · Computer Engineering and Applications Journal · 2013
In order to guarantee the quality of service for spectrum handoff, a multi-hop spectrum handoff algorithm is presented for the centralized cognitive radio networks, in which spectrum heterogeneity has been taken into account. A user mobile model is developed to predict the usage time of allocated channel, the different processing approaches are designed for different types of nodes in the routing path, and the cognitive radio base station selects the optimal path according to the predicted shortest path time and time stamp. Simulation results reveal that the proposed multi-hop routing algorithm can considerably decrease the handoff blocking probability, and the channel utilization is also enhanced. Moreover, further simulation results show that cognitive radio node's mobility plays an important role in the channel available usage time.