Cognitive Radio generates a big interest as a key cost-effective solution for the underutilization of frequency spectrum in legacy communication networks. The objective of this work lies in conducting a performance evaluation of the end-to-end message delivery under both Markovian and Poissonian primary traffics in lossy Cognitive Radio networks. We aim at inferring the most appropriate conditi...

The constantly growing number of wireless devices and applications makes efficient spectrum utilization critical. Cognitive radio technology offers a solution by employing opportunistic and adaptive selection of transmission parameters and communication strategies. Due to the lack of general simulation tools available for analyzing cognitive radio networks, we propose an agent-based framework f...

Cognitive radio (CR) technology is introduced to solve the problem of spectrum underutilization in wireless networks by opportunistically exploiting portions of the spectrum temporarily vacated by licensed primary users. In this paper, we present a survey of recent routing protocols in Cognitive Radio Networks (CRNs). We start by listing routing challenges that should be considered for differen...

Application of cognitive radios as the wireless terminals in ad hoc networks in emergency situations has distinct advantages. Better bandwidth, interoperability, avoidance of interference, and ant-jamming capabilities are a few such advanta This paper deals with ad hoc networks incorporated with cognitive radios, which acts as wireless terminals, that can be used in emergency situations and can...

Cognitive radio based networks can resolve the spectrum scarcity issues present in the current emergency communication networks. Establishing quick and secure communication between rescue team members in the disaster field is a significant task and cognitive radio MANETs are the best choice for disaster management and other emergency situations. This paper presents a scalable group key agreemen...

In the scope of the Adaptive Ad-hoc Freeband (AAF) project, an emergency network built on top of Cognitive Radio is proposed to alleviate the spectrum shortage problem which is the major limitation for emergency networks. Cognitive Radio has been proposed as a promising technology to solve today’s spectrum scarcity problem by allowing a secondary user in the non-used parts of the spectrum that ...

Cognitive radio is a promising approach to make efficient use of spectrum by rapidly adapting the changes in wireless environment. In such networks, nodes are expected to be aware of their environment and must be able to learn from the outcomes of past decisions. Game theory which comprise of analytical tools designed to study interactive decision-making processes can be applied effectively to ...

Due to scarcity of spectrum Cognitive Radio (CR) is one of the most challenging recently emerged fields of Wireless Networks. Spectrum decision is the capability of a cognitive radio (CR) to select the best accessible spectrum band to satisfy secondary users' (SUs'), quality of service (QoS) requirements, without causing harmful interference to licensed or primary users (PUs). It’s solved the p...

Cognitive radio is one of the most promising wireless technologies and has been recognized as a new way to improve the spectral efficiency of wireless networks. In a cognitive radio network, secondary users exchange control information for network coordination such as transmitter-receiver handshakes, for sharing spectrum sensing results, for neighbor discovery, to maintain connectivity, and so ...

The emerging network virtualization technique is considered as a promising technology that enables the deployment of multiple virtual networks over a single physical network. These virtual networks are allowed to share the set of available resources in order to provide different services to their intended users. While several previous studies have focused on wired network virtualization, the fi...