Transmission protocols in Cognitive Radio Mesh Networks

On Multipath Transmission Scheduling in Cognitive Radio Mesh Networks

Nodes in a cognitive radio mesh network comprised of secondary users may select from a set of available channels provided they do not interfere with primary users. This ability can improve overall network performance but introduces the question of how best to use these channels. Given a routing multipath M , we would like to choose which channels each link in M should use and a corresponding tr...

Cooperative Spectrum Sensing Protocols for Cognitive Radio Mesh Networks

In this paper, we consider the cooperative spectrum sensing problem in a cognitive radio (CR) mesh network, where secondary users (SUs) are self-organized into a IEEE 802.16 mesh network sharing the spectrum band allocated to a primary users’ (PUs) network. We propose two new cooperative spectrum sensing strategies, called amplify-and-relay (AR) and detect-andrelay (DR), aiming at improving the...

Overlay Cognitive Radio in Wireless Mesh Networks

In this paper we apply the concept of overlay cognitive radio to the communication between nodes in a wireless mesh network. Based on the overlay cognitive radio model, it is possible to have two concurrent transmissions in a given interference region, where usually only one communication takes place at a given time. We analyze the cases of wireless mesh networks with regular and random topolog...

Routing Protocols in Cognitive Radio Networks

Spectrum Aware Routing in Cognitive Radio Mesh Networks

Cognitive radio technology holds great promises in enabling unlicensed operation in licensed bands, to meet the increasing demand for radio spectrum. The new open spectrum operation necessitates novel routing protocols to exploit the available spectrum opportunistically. In this paper we present SAMER, a routing solution for cognitive radio mesh networks. SAMER opportunistically routes traffic ...