Routing in Mobile Ad-hoc Cognitive Radio Networks
Recent research activities about Cognitive Radio (CR) are mainly focusing on opportunistic spectrum access and spectrum utilization. However, CR technology will have significant impacts on upper layer performance in wireless networks, especially in Mobile Ad-hoc NETworks (MANETs). In this paper, the authors study topology control and routing issues in CR-MANETs and propose a distributed Prediction-based Cognitive Topology Control (PCTC) scheme to provision cognition capability to routing in CR-MANETs. PCTC is a middleware-like cross-layer module residing between CR modules and routing. It uses cognitive link availability prediction, which is aware of the interference to primary users and user mobility, to predict the available duration of links.