Control Channel Based MAC-Layer Configuration, Routing and Situation Awareness for Cognitive Radio Networks

Abstract

Abstract-In a Cognitive Radio (CR) network, MAClayer configuration involves determining a common set of channels to facilitate communication among participating nodes. Further, the availability of multiple channels and frequent channel switches add to the complexity of route selection. Knowledge of the global network topology can be used to solve the above-described problems. In this paper, we propose a distributed algorithm for gathering global network topology information for a CR network. We outline approaches that utilize the gathered topology information for MAC-layer configuration and efficient routing of packets. In addition, situation awareness is achieved by sharing the physical location information among the nodes in the network. The proposed algorithm determines the global network topology in

A survey on spectrum management in cognitive radio networks

“…To describe the dynamic nature of CR networks, a new metric -primary user activity -is proposed [10], which is defined as the probability of a primary user appearance during CR user transmission. Because there is no guarantee that a spectrum band will be available during the entire communication of a CR user, it is important to consider how often the primary user appears on the spectrum band.…”

Issues in Realization of Cognitive Radio Sensor Networks

“…Existing ad hoc cognitive radio routing schemes [27,28,29] aim to provide joint spectrum and routing decisions, however, do not consider the inherent resource constraints of CRSN. At the same time, routing schemes developed for WSN mainly aim to minimize energy consumption [30] and do not handle dynamic spectrum access.…”

Cognitive Radio: A New Standard in Wireless Communication Technology

“…An opportunistic frequency channel hopping protocol is proposed for the search of channel for better QoS, here the channel decision is based on SNR. In order to consider the PUs activity, the number of spectrum handoff either Hard Handoff (HH) or Soft Handoff (SH), which happens in a certain spectrum bands, is used for spectrum decision [15].…”