Dynamic layered-graph model for routing in cognitive radio network
Dong Yu-ning · Journal of PLA University of Science and Technology · 2008
To analyze routing protocol in cognitive radio(CR) networks effectively,a dynamic routing model is necessary.Dynamic layered graphic(DG) was proposed aiming at the characteristic of dynamic spectrum access in CR networks.In DG model,nodes were split into many sub-nodes,and each sub-node state could denote whether the related channel was available or not.In DG model,sub-node state was taken as a stochastic process and the model of cognitive radio network′s dynamic topology was set up by analyzing the dynamic characteristic of sub-node state.Simulation results show that in the aspect of the adaptability to CR network′s variable SOP and depiction of the topology,the DG model outperforms the layered graph(LG) model,and can adapt well to CR networks environment.