Cognitive Radio Network Crn System For Vehicle Safety Applications
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Cognitive Radio Network Crn System For Vehicle Safety Applications
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Author : Jae Han Lim
language : en
Publisher:
Release Date : 2014
Cognitive Radio Network Crn System For Vehicle Safety Applications written by Jae Han Lim and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
As the number of vehicle accidents increases, car manufacturers and academic researchers have developed a vehicular safety system. The key component of the safety system is vehicular communications, by which vehicles exchange their local status information with neighbor vehicles and disseminate a warning message within a specified area. The challenge lies in satisfying stringent communication requirements of the safety system, extremely reliable packet delivery and low communication latency. Unfortunately, the current de-facto standard for vehicular communications, Dedicated Short-Range Communication (DSRC) cannot meet the requirements especially in high vehicle density. Specifically, high operation frequency of the DSRC causes serious signal attenuation in Non Line-Of-Sight (NLOS) conditions and the frequent exchanges of vehicle status information make the network easily congested. To overcome this challenge, we exploit extra TV White Space (TVWS), which Federal Communications Commission (FCC) allowed unlicensed users to access in the absence of license user's activities. The use of extra TVWS helps to improve the safety system because 1) adoption of extra frequency resource can mitigate the network congestion and 2) the excellent TVWS signal propagation improves the reachability of the safety message dissemination. Thus, in this doctoral dissertation, we design and evaluate TVWS-based Cognitive Radio Network (CRN) systems as a solution for realizing the vehicular safety system. First, we evaluate various vehicular MAC protocols using network simulator (NS-2) and investigate whether the MAC protocols are feasible to the vehicular safety system when only using a frequency band allocated to the DSRC (i.e., DSRC band). Next, we propose a TVWS-based CRN system that is specialized for the safety message dissemination in the safety system. More specifically, we utilize an extra TVWS band for emergency safety message dissemination, and exploit a DSRC band for 1) the exchange of control data and 2) the compensation of the reception errors. Finally, we propose a TVWS-based CRN system that supports reliable safety message dissemination in a NLOS corner. Specifically, for reliable dissemination in the NLOS corner, the proposed system leverages the excellent propagation characteristics of a TVWS signal and further improves the reliability by adopting a novel retransmission mechanism. Through in-depth simulation studies, we show that the proposed system outperforms previous system designs and supports the safety systems well.
Distributed Cooperative Spectrum Sensing For Overlay Self Organizing Dynamic Cognitive Radios Network Systems
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Author : Chih-Kai Chen
language : en
Publisher:
Release Date : 2012
Distributed Cooperative Spectrum Sensing For Overlay Self Organizing Dynamic Cognitive Radios Network Systems written by Chih-Kai Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Cognitive Radio Network (CRN) is an emerging technology to increase usages of the underutilized spectrum. Since cognitive radios (CR) join and leave CRN at will, as a dynamic secondary overlay network operating in the dynamic scenarios, CRN faces many new practical challenges. Spectrum sensing is a key functionality enabling dynamic spectrum management. Distributed cooperative spectrum sensing can effectively overcome the hidden primary user issue. The performance of the distributed sensing scheme is affected by the number of collaborative CRs. In this dissertation, we analyze the performance of cooperative spectrum sensing for the dynamic CRN systems, which is a more realistic application scenario. Closed form exact expressions for the dynamic performance of distributed energy-based cooperative spectrum sensing over different fading channels are derived. These expressions enable the calculation of probability of detection and probability of false alarm efficiently tractable, and also provide a feasible approach for optimization of sensing performance. Quick performance evaluation is essential for CRN to achieve real-time adaptation to guarantee optimal system operations. We also study two promising applications for cognitive radio networks technologies: wireless cellular networks and public safety emergency networks. We analyze the performance of cooperative spectrum sensing in these two scenarios and the closed form expressions provide the framework to apply the cognitive radio networks technologies to perform online learning for self-organizing dynamic ad hoc cellular wireless system and public safety emergency networks system.
Cognitive Radio Based Internet Of Vehicles
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Author : Syed Hashim Raza Bukhari
language : en
Publisher: CRC Press
Release Date : 2024-08
Cognitive Radio Based Internet Of Vehicles written by Syed Hashim Raza Bukhari and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-08 with Computers categories.
The incorporation of Cognitive Radio (CR) into the Internet of Vehicles (IoV) has emerged as the Intelligent Transportation System (ITS). In CR-IoV, ML and Data Science can be collaboratively used to further enhance road safety through inter-vehicle, intra-vehicle, and beyond-vehicle networks.
Introduction To Cognitive Radio Networks And Applications
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Author : Geetam Tomar
language : en
Publisher: CRC Press
Release Date : 2016-10-03
Introduction To Cognitive Radio Networks And Applications written by Geetam Tomar and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-10-03 with Computers categories.
Cognitive radio is 5-G technology, comes under IEEE 802.22 WRAN (Wireless Regional Area Network) standards. It is currently experiencing rapid growth due to its potential to solve many of the problems affecting present-day wireless systems. The foremost objective of "Introduction to Cognitive Radio Networks and Applications" is to educate wireless communication generalists about cognitive radio communication networks. Written by international leading experts in the field, this book caters to the needs of researchers in the field who require a basis in the principles and the challenges of cognitive radio networks.
Multimedia Over Cognitive Radio Networks
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Author : Fei Hu
language : en
Publisher: CRC Press
Release Date : 2014-12-04
Multimedia Over Cognitive Radio Networks written by Fei Hu and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-12-04 with Technology & Engineering categories.
With nearly 7 billion mobile phone subscriptions worldwide, mobility and computing have become pervasive in our society and business. Moreover, new mobile multimedia communication services are challenging telecommunication operators. To support the significant increase in multimedia traffic—especially video—over wireless networks, new technological infrastructure must be created. Cognitive Radio Networks (CRNs) are widely regarded as one of the most promising technologies for future wireless communications. This book explains how to efficiently deliver video, audio, and other data over CRNs. Covering advanced algorithms, protocols, and hardware-/software-based experiments, this book describes how to encode video in a prioritized way to send to dynamic radio links. It discusses different FEC codes for video reliability and explains how different machine learning algorithms can be used for video quality control. It also explains how to use readily available software tools to build a CRN simulation model. This book explains both theoretical and experimental designs. It describes how universal software radio peripheral (USRP) boards can be used for real-time, high-resolution video transmission. It also discusses how a USRP board can sense the spectrum dynamics and how it can be controlled by GNU Radio software. A separate chapter discusses how the network simulator ns-2 can be used to build a simulated CRN platform.
Cognitive Vehicular Networks
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Author : Anna Maria Vegni
language : en
Publisher: CRC Press
Release Date : 2018-12-20
Cognitive Vehicular Networks written by Anna Maria Vegni and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-12-20 with Computers categories.
A comprehensive text on both current and emerging areas of cognitive vehicular networks, this book focuses on a new class of mobile ad hoc networks. It uses a pedagogical approach utilizing cognitive aspects applied to vehicular environments and comprises contributions from well-known and high profile researchers in their respective specialties. The book provides significant technical and practical insights on different perspectives, starting from a basic background on cognitive radio, interrelated technologies, application to vehicular networks, technical challenges, and future trends.
Cognitive Radio Technology Applications For Wireless And Mobile Ad Hoc Networks
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Author : Meghanathan, Natarajan
language : en
Publisher: IGI Global
Release Date : 2013-06-30
Cognitive Radio Technology Applications For Wireless And Mobile Ad Hoc Networks written by Meghanathan, Natarajan and has been published by IGI Global this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-30 with Technology & Engineering categories.
Radio interference is a problem that has plagued air communication since its inception. Advances in cognitive radio science help to mitigate these concerns. Cognitive Radio Technology Applications for Wireless and Mobile Ad Hoc Networks provides an in-depth exploration of cognitive radio and its applications in mobile and/or wireless network settings. The book combines a discussion of existing literature with current and future research to create an integrated approach that is useful both as a textbook for students of computer science and as a reference book for researchers and practitioners engaged in solving the complex problems and future challenges of cognitive radio technologies.
Cognitive Networks
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Author : Jaime Lloret Mauri
language : en
Publisher: CRC Press
Release Date : 2014-12-09
Cognitive Networks written by Jaime Lloret Mauri and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-12-09 with Technology & Engineering categories.
A cognitive network makes use of the information gathered from the network in order to sense the environment, plan actions according to the input, and make appropriate decisions using a reasoning engine. The ability of cognitive networks to learn from the past and use that knowledge to improve future decisions makes them a key area of interest for anyone whose work involves wireless networks and communications. Cognitive Networks: Applications and Deployments examines recent developments in cognitive networks from the perspective of cutting-edge applications and deployments. Presenting the contributions of internationally renowned experts, it supplies complete and balanced treatment of the fundamentals of both cognitive radio communications and cognitive networks—together with implementation details. The book includes case studies and detailed descriptions of cognitive radio platforms and testbeds that demonstrate how to build real-world cognitive radio systems and network architectures. It begins with an introduction to efficient spectrum management and presents a survey on joint routing and dynamic spectrum access in cognitive radio networks. Next, it examines radio spectrum sensing and network coding and design. It explores intelligent routing in graded cognitive networks and presents an energy-efficient routing protocol for cognitive radio ad hoc networks. The book concludes by considering dynamic radio spectrum access and examining vehicular cognitive networks and applications. Presenting the latest standards and spectrum policy developments, the book’s strong practical orientation provides you with the understanding you will need to participate in the development of compliant cognitive systems.
Advances In Cognitive Radio Systems
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Author : Cheng-Xiang Wang
language : en
Publisher: BoD – Books on Demand
Release Date : 2012-07-05
Advances In Cognitive Radio Systems written by Cheng-Xiang Wang and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-07-05 with Technology & Engineering categories.
Cognitive radio technologies are forms of wireless communication with many and varied applications. The contributions in this book will benefit researchers and engineers as they offer cutting-edge knowledge in the field. Subjects include uses of wideband voltage controlled oscillators, control planes for spectrum access and mobility in networks with heterogeneous frequency devices. Other chapters cover cognitive media access control and measurement methods for spectrum occupancy. In addition, there are contributions on delay analysis and channel selection in single-hop networks for delay-sensitive applications, the application of transmission security (TRANSEC) protocols to cognitive radio communication and the use of blind detection, parameters, estimation and the despreading of DS-CDMA signals in multirate, multiuser cognitive radio systems.
Cognitive Radio Networks
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Author : Yan Zhang
language : en
Publisher: CRC Press
Release Date : 2016-04-19
Cognitive Radio Networks written by Yan Zhang and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-04-19 with Computers categories.
While still in the early stages of research and development, cognitive radio is a highly promising communications paradigm with the ability to effectively address the spectrum insufficiency problem. Written by those pioneering the field, Cognitive Radio Networks: Architectures, Protocols, and Standards offers a complete view of cognitive radio-incl