scholarly journals Architecture design of ad-hoc cognitive radio network

2018 ◽  
Vol 11 (18) ◽  
pp. 1-7
Author(s):  
P. Surendar ◽  
A. Sridevi ◽  
R. Sona ◽  
◽  
◽  
...  
Keyword(s):  
Cognitive Radio ◽  
Ad Hoc ◽  
Cognitive Radio Network ◽  
Architecture Design ◽  
Radio Network

Modeling of Software Defined Radio Architecture and Cognitive Radio

2014 ◽  
pp. 127-158 ◽  
Author(s):  
Jyoti Sekhar Banerjee ◽  
Arpita Chakraborty
Keyword(s):  
Cognitive Radio ◽  
Software Defined Radio ◽  
Network Architecture ◽  
Ad Hoc ◽  
Cognitive Radio Network ◽  
Cognitive Radios ◽  
Radio Link ◽  
Radio Network ◽  
Hoc Networks ◽  
Wireless Node

Today's wireless networks are characterized by fixed spectrum assignment policy. The spectral scarcity and the inefficiency in the spectrum usage necessitate new communication paradigms to exploit the existing wireless spectrum, opportunistically. Software Defined Radio (SDR) and Cognitive Radio (CR) are the very paradigms for wireless communication, in which either a network or a wireless node reconfigures its transmission or reception parameters to communicate efficiently, avoiding interference with licensed or unlicensed users. CR adapts itself to the newer environment on the basis of its intelligent sensing and captures the best available spectrum to meet user communication requirements. When the radio link features are extended to the network layer, the cognitive radios form the cognitive radio network. This chapter is focused on software defined radio, its architecture, its limitations, evolution to cognitive radio network, architecture of the CR, and its relevance in wireless and mobile ad-hoc networks.

scholarly journals Cognitive radio network in vehicular ad hoc network (VANET): A survey

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Joanne Mun-Yee Lim ◽  
Yoong Choon Chang ◽  
Mohamad Yusoff Alias ◽  
Jonathan Loo
Keyword(s):  
Cognitive Radio ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Cognitive Radio Network ◽  
Vehicular Ad Hoc Network ◽  
Radio Network

Architecture of Cognitive Radio Networks

2013 ◽  
pp. 125-152 ◽  
Author(s):  
Jyoti Sekhar Banerjee ◽  
Arpita Chakraborty ◽  
Koushik Karmakar
Keyword(s):  
Cognitive Radio ◽  
Network Architecture ◽  
Ad Hoc ◽  
Cognitive Radio Network ◽  
Cognitive Radios ◽  
Radio Link ◽  
Radio Network ◽  
Communication Paradigm ◽  
Hoc Networks

Today’s wireless networks are characterized by fixed spectrum assignment policy. The spectral scarcity and the inefficiency in the spectrum usage necessitate a new communication paradigm to exploit the existing wireless spectrum, opportunistically. Cognitive Radio (CR) is that very paradigm for wireless communication, in which either a network or a wireless node reconfigures its transmission or reception parameters to communicate efficiently avoiding interference with licensed or unlicensed users. CR adapts itself to the newer environment on the basis of its intelligent sensing and captures the best available spectrum to meet user communication requirements. When the radio link features are extended to the network layer, the cognitive radios form the cognitive radio network. This book chapter is focused on cognitive radio network, architecture of the CR, and its relevance in the wireless and mobile Ad Hoc networks.

Secure Routing and Scheduling in Ad-Hoc Cognitive Radio Networks for Public Safety

2014 ◽  
Vol 5 (2) ◽  
pp. 44-60 ◽  
Author(s):  
Eric Chan-Tin ◽  
Qi Cheng
Keyword(s):  
Cognitive Radio ◽  
Public Safety ◽  
Ad Hoc ◽  
Cognitive Radio Network ◽  
Secure Routing ◽  
Social Aspect ◽  
Radio Network ◽  
Routing And Scheduling ◽  
Multiple Paths ◽  
Main Components

Public safety communication is a critical component of day-to-day life. The authors propose a flexible and resilient communication system using an ad-hoc cognitive radio network that fully utilizes the available spectrum resources. Two main components of the network are addressed: route discovery, i.e., identifying multiple paths from the source to the destination, and scheduling for these paths, i.e., efficiently allocating available resources to achieve an optimal transmission. Field-based routing is adopted. The authors also introduce a secure authentication and routing mechanism for this network. The authentication component leverages the social aspect of public safety communications and mitigates most basic wireless attacks. A hybrid novel reputation scheme is then proposed to allow for efficient routing in the presence of adversaries. The authors show through simulations that the proposed secure framework can efficiently reduce the transmission delay, be robust to the dynamics of channel availability, and mitigate routing attacks in a cognitive radio network.

scholarly journals The Design and the implementation of a robust scheme to combat the effect of malicious nodes in Cognitive Radio Ad Hoc networks

2019 ◽  
Vol 31 (2) ◽  
Author(s):  
Sekgoari Semaka Mapunya ◽  
Mthulisi Velempini
Keyword(s):  
Cognitive Radio ◽  
Data Fusion ◽  
Spectrum Sensing ◽  
Ad Hoc ◽  
Cognitive Radio Network ◽  
Signal Interference ◽  
Radio Network ◽  
Spectrum Access ◽  
Secondary Users ◽  
Comparative Results

Cognitive radio network, which enables dynamic spectrum access, addresses the scarcity of radio spectrum caused by ever-increasing demand for spectrum. Cognitive radio technology ensures the efficient utilisation of underutilised licenced spectrum by secondary users (SU). Secondary users, sense the radio environment before utilising the available spectrum to avoiding signal interference. The SU cooperatively sense the spectrum to ensure global view of the network. unfortunately, cooperative sensing is vulnerable to Byzantine attacks whereby SU falsify the spectrum reports for selfish reasons. Hence, this study proposes the implementation of a scheme to combat the effects of Byzantine attack in cognitive radio network. The proposed scheme, known as the extreme studentized cooperative consensus spectrum sensing (ESCCSS), was implemented in an ad hoc cognitive radio networks environment where the use of a data fusion centre (DFC) is not required. Cognitive radio nodes perform their own data fusion making spectrum access decisions. They fuse their own reports with reports from neighbouring nodes. To evaluate the performance of our scheme and its effectiveness in combating the effect of byzantine attack, comparative results are presented. The comparative results show that the ESCCSS outperformed the Attack-Proof Cooperative Spectrum Sensing scheme.

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