Cognitive communication in TV white spaces: An overview of regulations, standards, and technology [Accepted From Open Call]

Sum, Chin-Sean; Villardi, Gabriel Porto; Rahman, M.A.; Baykaş, Tunçer; Tran, Ha Nguyen; Zhou, Lan; Sun, Chen; Alemseged, Yohannes D.; Wang, Junyi; Song, Chunyi; Pyo, Cheol Sig; Filin, Stanislav; Harada, Hiroshi

doi:10.1109/mcom.2013.6553690

Cited by 79 publications

(32 citation statements)

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“…A typical spectrum database is that utilized for spectrum sharing in TV white space [4]. TV white space is a shared spectrum system on a primary TV broadcasting system; secondary wireless devices are utilized on the spatially unused spectrum allocated to the TV broadcasting system.…”

Section: Spectrum Database For Smart Spectrummentioning

confidence: 99%

“…In 1999, a new spectrum allocation concept called "cognitive radio" was considered and dynamic spectrum allocation according to the radio environment recognition was proposed [3]. The spectrum sharing system on the TV broadcasting band, called TV white space, was regulated and some services were launched in the US, UK, and other countries [4]. In a TV white space system, in order to manage the spectrum such that interference to the TV broadcasting receiver is avoided, a geolocation database storing a list of the available channels of each location is used [5].…”

Section: Introductionmentioning

confidence: 99%

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Smart Spectrum for Future Wireless World

Fujii

Umebayashi

2017

IEICE Trans. Commun.

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SUMMARY As the role of wireless communication is becoming more important for realizing a future connected society for not only humans but also things, spectrum scarcity is becoming severe, because of the huge numbers of mobile terminals and many types of applications in use. In order to realize sustainable wireless connection under limited spectrum resources in a future wireless world, a new dynamic spectrum management scheme should be developed that considers the surrounding radio environment and user preferences. In this paper, we discuss a new spectrum utilization framework for a future wireless world called the "smart spectrum." There are four main issues related to realizing the smart spectrum. First, in order to recognize the spectrum environment accurately, spectrum measurement is an important technology. Second, spectrum modeling for estimating the spectrum usage and the spectrum environment by using measurement results is required for designing wireless parameters for dynamic spectrum use in a shared spectrum environment. Third, in order to effectively gather the measurement results and provide the spectrum information to users, a measurement-based spectrum database can be used. Finally, smart spectrum management that operates in combination with a spectrum database is required for realizing efficient and organized dynamic spectrum utilization. In this paper, we discuss the concept of the smart spectrum, fundamental research studies of the smart spectrum, and the direction of development of the smart spectrum for targeting the future wireless world. key words: smart spectrum, spectrum measurement, spectrum usage modeling, spectrum database, spectrum management

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Section: Spectrum Database For Smart Spectrummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Smart Spectrum for Future Wireless World

Fujii

Umebayashi

2017

IEICE Trans. Commun.

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“…By using a cooperative sensing system, it is possible to reduce the possibility of this happening because a greater number of receivers will be able to build up a much more accurate picture of the transmissions in the area by taking advantage of the spatial diversity of the different sensing nodes. Therefore, cooperative sensing can help improve the detection accuracy through cooperation among SUs on spectrum sensing (Sum et al, 2013;Sum et al, 2011).…”

Section: Cooperative Sensingmentioning

confidence: 99%

Coexistence and interference analysis in TV white spaces

Kimani

2017

Int. j. adv. appl. sci.

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The demand for wireless connectivity is increasing exponentially resulting in an unprecedented demand on the limited radio spectrum. Due to the current fixed spectrum licensing scheme, it is becoming increasingly arduous to find extra spectrum resulting in a paradigm shift towards efficient utilization of radio spectrum in order to address the spectrum scarcity. The transition from analogue to digital terrestrial television has freed-up some spectrum thereby creating unique opportunities for exploitation of locally underused portions of the TV bands referred to as TV white spaces (TVWS) and their exploitation offers an attractive way of making efficient use of radio spectrum as long as the secondary users do not interfere with the primary users. This is enabled by employing cognitive radio technology that allows for dynamic spectrum access. This paper investigates the aspect of interference in TV White spaces and the possibility of mutual coexistence between primary users and secondary users operating in TV White spaces. The impact of interfering signals is undertaken to show the probability of interference in both same channel and different adjacent channels scenarios. The interference analysis is carried out using the SEAMCAT simulation software. Simulation results show that in a power limited secondary network, vacation of cognitive users from active spectrum bands is crucial for ensuring coexistence. The various interference mitigation mechanisms employed by CR networks are also reviewed. In TV white spaces, mitigating interference is vital not only for primary user protection, but also for ensuring the quality of service of the secondary users.

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“…It has a wide range of application areas ranging from Television WhiteSpaces (TVWSs) [2] to satellite communications [3], [4] and several industry players are putting significant efforts towards the realisation of CR technology [5]. In CR terminology, Primary (licensed) Users (PUs), also called incumbent users, can be defined as the users who have higher priority or legacy rights on the use of a specific part of the spectrum.…”

Section: Introductionmentioning

confidence: 99%

Cognitive Radio Techniques Under Practical Imperfections: A Survey

Sharma

Bogale

Chatzinotas

et al. 2015

IEEE Commun. Surv. Tutorials

199

111

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Abstract-Cognitive Radio (CR) has been considered as a potential candidate for addressing the spectrum scarcity problem of future wireless networks. Since its conception, several researchers, academic institutions, industries, regulatory and standardization bodies have put their significant efforts towards the realization of CR technology. However, as this technology adapts its transmission based on the surrounding radio environment, several practical issues may need to be considered. In practice, several imperfections such as noise uncertainty, channel/interference uncertainty, transceiver hardware imperfections, signal uncertainty, synchronization issues, etc. may severely deteriorate the performance of a CR system. To this end, the investigation of realistic solutions towards combating various practical imperfections is very important for successful implementation of the cognitive technology. In this direction, first, this survey paper provides an overview of the enabling techniques for CR communications. Subsequently, it discusses the main imperfections that may occur in the most widely used CR paradigms and then reviews the existing approaches towards addressing these imperfections. Finally, it provides some interesting open research issues.

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Cognitive communication in TV white spaces: An overview of regulations, standards, and technology [Accepted From Open Call]

Cited by 79 publications

References 0 publications

Smart Spectrum for Future Wireless World

Smart Spectrum for Future Wireless World

Coexistence and interference analysis in TV white spaces

Cognitive Radio Techniques Under Practical Imperfections: A Survey

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