TV White Spaces exploitation utilizing a Cognitive Radio system based on DVB-H (original) (raw)
Related papers
A survey of cognitive radio access to TV White Spaces
2009 International Conference on Ultra Modern Telecommunications & Workshops, 2009
Cognitive radio is being intensively researched as the enabling technology for license-exempt access to the so-called TV White Spaces (TVWS), large portions of spectrum in the UHF/VHF bands which become available on a geographical basis after digital switchover. Both in the US, and more recently, in the UK the regulators have given conditional endorsement to this new mode of access. This paper reviews the state-of-the-art in technology, regulation, and standardisation of cognitive access to TVWS. It examines the spectrum opportunity and commercial use cases associated with this form of secondary access.
Cognitive radio for TVWS usage
TELKOMNIKA Telecommunication Computing Electronics and Control, 2019
Spectrum scarcity is an emerging issue in wireless communication systems due to the increasing demand of broadband services like mobile communications, wireless internet access, IoT applications, among others. The migration of analog TV to digital systems (a.k.a. digital TV switchover) has led to the release of a significant spectrum share that can be used to support said additional services. Likewise, TV white spaces emerge as spectral opportunities that can also be explored. Hence, cognitive radio (CR) presents itself as a feasible approach to efficiently use resources and exploit gaps within the spectrum. The goal of this paper is to unveil the state of the art revolving around the usage of TV white spaces, including some of the most important methods developed to exploit such spaces, upcoming opportunities, challenges for future research projects, and suggestions to improve current models.
Joint Radio Resource Management in Cognitive Networks: TV White Spaces Exploitation Paradigm
researchgate.net
In this book chapter, joint radio resource management (JRRM) issues in cognitive networks are discussed presenting the TV White Spaces (TVWS) spectrum exploitation use case. TVWS are portions of UHF spectrum, which will be released and interleaved according to the geographical region due to the gradual switch-off of analogue TV and the adoption of digital TV. With the availability of TVWS and their temporary lease, traditional network planning and RRM design rationale points need to be enhanced. This book chapter initially provides a state-of-the-art work for existing cognitive radio network architectures, while a reference architecture for commons and secondary TVWS trading is proposed. Subsequently, JRRM concepts for heterogeneous Radio Access Technologies' extension over TVWS aiming to continuously guarantee the QoS, the network key performance indicators and at the same time targeting the overall highest system capacity, are presented. Finally, a thorough classification of existing admission control and scheduling techniques is provided, outlining the need for including continuously more cognitive and context-aware features in JRRM algorithms being applicable in advanced heterogeneous networking (HetNet) environments.
A Survey of Resource Allocation in TV White Space Networks
Journal of Communications
Dynamic Spectrum Access (DSA), through the use of cognitive radio, is currently being embraced as a solution to address spectrum scarcity and spectrum underutilization. DSA allows the use of an unutilized spectrum as long the Secondary Users (SUs) do not cause harmful interference to the Primary Users (PUs). TV White Spaces (TVWS) are spectrum bands that have attracted a lot of research and development interest because of the good propagation characteristics attainable within such bands. The aim of resource allocation in cognitive access to TVWS is to efficiently assign the available spectrum and power to SUs such that the interference constraints to PUs and SUs are met. Radio resource allocation is a subset of the DSA that significantly addresses the spectrum scarcity and interference in TVWS networks. However, the existing literature does not adequately provide a comprehensive survey on the resource allocation in TVWS networks. Hence it is difficult to identify the specific focus and direction of the future research, development and application on this subject matter. In this paper, we provide a comparison of TVWS resource allocation proposals and also highlight open research issues on the same. This paper is useful to TVWS and cognitive radio researchers who are designing TVWS resource allocation algorithms and also those who want to know future research directions in this area.
European Journal of Electrical Engineering and Computer Science
The cognitive radio network (CRN) is considered as one of the most important technologies that can allow the different users work as the same spectrum by different priorities. This paper proposes new methods and solutions to implement and performance analysis of work the WiMAX system within the spectrum of digital television broadcasting terrestrial through the cognitive radio network under various conditioning and types of modulation. Also, this paper explains and analyze the mechanism in which the cognitive radio works. Finally will be designed a prototype device simulate work the WiMAX system as a secondary user in digital TV broadcasting through the cognitive radio techniques.
Can Cognitive Radio Access to TV White Spaces Support Future Home Networks?
2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN), 2010
There is a growing demand for high data-rate mobile and indoor services at a reasonable cost, and using an indoor wireless system at end of the ADSL+ or fibre line is one potential way of meeting this demand. Industry players such as fixed-line and cellular operators have adopted similar approaches but based around different wireless technologies such as WiFi or HSPA femtocells and potentially LTE/WiMAX in the future. However due to issues related to interference in the license-exempt band and limited spectrum availability in the licensed band there are some doubts as to whether or not the available wireless options will be able to effectively distribute the high bandwidths within a home environment. With use of cognitive radio technology, the digital TV switchover program, offers a potential opportunity to address this issue. The aim of this paper is to assess the feasibility of using the TV White Space(TVWS) spectrum for home networking services and compare the performance with that of other license-exempt spectral bands, namely 2.4 GHz and 5 GHz ISM band. It studies the limitations in presence of interference and identifies the operating conditions when the system performance would start to become unacceptable. Using analytical and simulation techniques, it is shown that the performance of TVWS spectral outperforms the 5 GHz and 2.4 GHz for low to medium traffic loadings (around 2 Mb/s per home) at significantly lower energy requirements. However, to achieve these gains (a) the use of spectrum aggregation techniques and (b) operation at low power levels, i.e, below 3 dBm per channel becomes essential. The work also shows that for heavy traffic loadings (6 Mb/s and above per home) in dense deployment densities, TVWS band should be used as complementary interface for congestion relief instead.