Topic
Cognitive network
About: Cognitive network is a research topic. Over the lifetime, 4213 publications have been published within this topic receiving 107093 citations.
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Papers
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01 Jan 2013
TL;DR: The need of careful engineering with security checks while designing the cognitive radio networks is illustrated and the current security and privacy solutions available are discussed.
Abstract: Cognitive radio technology is the vision of pervasive wireless communications that improves the spectrum utilization and offers many social and individual benefits. The objective of the cognitive radio network technology is to utilize the unutilized spectrum by primary users and fulfill the secondary users' demands irrespective of time and location (any time and any place). Due to their flexibility, the cognitive radio networks are vulnerable for numerous threats and security problems that will affect the performance of the network. Little attention was given to security aspects in cognitive radio networks that include spectrum sensing (sensing primary user), attacks that threaten the network at various layers and adversary effects on performance due to the security threats. In this survey, we discuss the cognitive radio networks, problems involved in sensing and management, attacks on cognitive radio networks, attacks on various network layers, threats on cognitive radio networks, and the current security and privacy solutions available. Further, we illustrate the need of careful engineering with security checks while designing the cognitive radio networks.
17 citations
01 Nov 2012
TL;DR: This work considers the true definition of a primary user emulation attacker (PUEA) in which fake signals are sent when the primary user signal is not present in the radio environment and formulate and derive cooperative spectrum sensing (CSS) rules for a cognitive network in the presence of a PUEA.
Abstract: Cognitive radio as a solution of spectrum scarcity, proposes a dynamic spectrum access which imposes some threats to the network. One of these common threats is primary user emulation attack, where some malicious users try to mimic the primary signal and deceive secondary users to prevent them from accessing vacant frequency bands. In this work, we consider the true definition of a primary user emulation attacker (PUEA) in which fake signals are sent when the primary user signal is not present in the radio environment. We formulate and derive cooperative spectrum sensing (CSS) rules for a cognitive network in the presence of a PUEA and propose a new spectrum sensing based on energy detection with fusion centers employing OR/AND logic rules. Simulation results show that our proposed method can mitigate the destructive effect of PUEA in spectrum sensing, compared to conventional energy detection spectrum sensing.
17 citations
24 Oct 2008
TL;DR: The vision of the building blocks needed to create an open platform for cognitive network experimentation and prototyping are described, including mechanisms for distributed spectrum sensing, a MAC protocol tailored to dynamic spectrum access, and interface languages for cognitive networks.
Abstract: Experimental research on networks of cognitive radios has been hindered by the lack of open, affordable cognitive radios and associated software that are capable of operating with the full network protocol stack. In this paper, we describe our vision of the building blocks needed to create an open platform for cognitive network experimentation and prototyping. These include mechanisms for distributed spectrum sensing, a MAC protocol tailored to dynamic spectrum access, and interface languages for cognitive networks.
17 citations
28 Jun 2009
TL;DR: For the case of a class of “very strong” interference channels, this paper shows that all users can simultaneously communicate as if all cross-channels in the interference network were absent.
Abstract: This paper studies the K ≫ 2 user cognitive radio network. In this paper, there are one licensed transmit-receive pair and K – 1 cognitive transmit-receive pairs wishing to communicate simultaneously. For the case of a class of “very strong” interference channels, this paper shows that all users can simultaneously communicate as if all cross-channels in the interference network were absent.
17 citations
01 Oct 2006
TL;DR: The functional evolution of cognitive radio is studied, followed by the discussion of the development of several spectrum policies and standardizations, and the recent research issues of key techniques, such as spectrum sensing, primary user detection, dynamic spectrum allocation, power control, as well as the typical applications of Cognitive radio in wireless region area network, ad hoc network and UWB system are focused on.
Abstract: Cognitive Radio has received a lot of interests as a novel approach for improving the utilization of spectrum resource in recent years. In this paper, we first study the functional evolution of Cognitive Radio. Then following the discussion of the development of several spectrum policies and standardizations, we focus on the recent research issues of key techniques, such as spectrum sensing, Primary User detection, dynamic spectrum allocation, power control, as well as the typical applications of Cognitive Radio in Wireless Region Area Network, Ad Hoc network and UWB system. Finally, we finish by discussion on our work and briefly investigating several possible future research directions of Cognitive Radio.
17 citations