A Novel Homogeneous Mesh Grouping Scheme for Broadcast Cognitive Pilot Channel in Cognitive Wireless Networks

With the irreversible trend of the convergence and cooperation among heterogeneous wireless networks, the need for network information awareness of user equipments (UEs) becomes increasingly imperative in the Cognitive Wireless Networks (CWN). As one of the candidate solutions for network information delivery for UEs, the Cognitive Pilot Channel (CPC) concept has been brought forward recently, providing UEs with the necessary network information for network selection by using the public signaling channel. Besides, both broadcast and on-demand CPC modes have been proposed for the network information delivery under the assumption that the geographical region is divided into meshes. In this paper, a novel homogeneous mesh grouping (HoMGP) scheme based broadcast CPC mode is designed to improve the efficiency of broadcast CPC mode in the CWN. The homogeneous meshes are selected and grouped based on the frequency occupancy graph, which is obtained by using the image processing techniques. By grouping the homogeneous meshes together, both the frame format and flow of the HoMGP broadcast CPC mode are designed to deliver heterogeneous network information to the UEs efficiently, which is verified by numerous simulation results.