Description

In this process, we propose a novel spectrum-aware any path routing protocol (SAAR) for multi-hop CRNs. We use a recently proposed network architecture for CRNs, called Cognitive Capacity Harvesting networks (CCHs), as an example to illustrate our design. CCH consists of a secondary service provider (SSP), cognitive base stations (BSs), cognitive radio routers (CR routers), and secondary users (SUs). The SSP is the operator and manager of CCH, which harvests spectrum resource and allocates it to the network. The CR routers are equipped with cognitive radios, which perform spectrum sensing, collect demand from SUs, and transmit their data around over available licensed spectrum. The BSs are interconnected with high-speed wired links and serve as the gateways of CCH. SUs include wireless devices using traditional wireless access technologies, and also include wireless devices that are equipped with advanced cognitive radios for communication. CCH forms a spectrum cloud and facilitates the access of SUs with or without cognitive radio capability, which represents a design paradigm shift from individual benefit to collective welfare. Note that the any path routing protocol SAAR we proposed can be used in any multi-hop CRN with a central node that can perform channel and link information collection and routing table computation, which is not limited to CCHs.