Testbed for combination of local sensing with geolocation database in real environments

Ribeiro, José Carlos; Ribeiro, Jorge; Rodriguez, Jonathan; Dionísio, Rogério; Esteves, H; Duarte, Pedro Arthur Pinheiro Rosa; Marques, Paulo

doi:10.1109/mwc.2012.6272424

Cited by 20 publications

(12 citation statements)

References 3 publications

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“…Additionally, the work in [12] describes an experimental testbed that combines the Digital Video Broadcasting -Terrestrial (DVB-T) GLDB with blind sensing techniques in a way 2 Incumbent users are also known as the primary spectrum users, since they own the spectrum due to regulatory decisions. Secondary users are only able to use the spectrum when no primary users are using it, employing opportunistic methods [11].…”

Section: A Opportunistic Spectrum Access Methods For Tvws Exploitationmentioning

confidence: 99%

TV White Spaces for Digital Inclusion in Brazil

Nascimento¹,

Evangelista²,

Silva³

et al. 2016

RTIC

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This work presents a technological opportunity to improve the spectral efficiency and at the same time shows its importance to provide digital inclusion in Brazil. The methodology is applied in a case study investigating the area of Ceará, a Brazilian state, where a significant amount of spectrum that can be unleashed via TV White Spaces (TVWS) exploitation is relevant to be considered, due to its geographic and economical conditions. These white spaces can fill up some holes in the state that do not present any mobile coverage and improve the telecommunication services in other areas. The technology concept, world regulation situation and possible applications using the resource are described throughout this work. The main purpose is to use TVWS as a way to soften part of the poor coverage services of 3G, 4G and provide Internet access around the rural regions in Ceará.

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Section: A Opportunistic Spectrum Access Methods For Tvws Exploitationmentioning

confidence: 99%

TV White Spaces for Digital Inclusion in Brazil

Nascimento¹,

Evangelista²,

Silva³

et al. 2016

RTIC

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“…Techniques involving both spectrum sensing and information coming from geolocation databases have also been proposed and tested [16]. Ofcom, has performed a series of trials, as part of the TVWS pilot project, to test a number of aspects of white space technology, including the white space device and geolocation database interactions, the validity of the channel availability/powers calculations by the database and associated interference aspects on primary services [17].…”

Section: Wireless Communications and Mobile Computingmentioning

confidence: 99%

A Survey on Coexistence in Heterogeneous Wireless Networks in TV White Spaces

Maloku

Fazliu

Ibrani

2018

Wireless Communications and Mobile Computing

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With the advent of analog to digital transition in TV broadcasting, a substantial amount of spectrum has become available in TV bands. To take advantage of this, the idea for cognitive radios was introduced for two major reasons: better utilization of spectrum in urban areas and facilitation of wireless connectivity in rural areas. To achieve these two goals, however, many challenges have to be addressed first. Considering that these frequencies are commonly licensed, besides primary user detection, a serious challenge remains the detection and identification of other secondary devices and networks. The problems arising from this issue concern the coexistence problems happening from having several primary and secondary networks of different technologies cohabiting the same licensed spectrum simultaneously and from many secondary systems/users coexisting at the same place while using identical or different technologies. In this survey we provide a review of existing works and outline new challenges regarding coexistence and self-coexistence in heterogeneous wireless networks in TV White Spaces including a comparative analysis between selected coexistence mechanisms.

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“…However, until now there has been no single initiative to conduct white space trials experimenting with this hybrid solution. Other approaches combine a geolocation database with sensing carried on the portable WSD [7,8]; however, the hidden node problem may occur and reduce the reliability of the system. The objective of this work is to showcase the implementation of such an approach from the FP7-CREW (CREW-TV) project [9].…”

Section: Portugalmentioning

confidence: 99%

“…For each power iteration, each sensor simultaneously scans channel 60 with 1 MHz steps, during 60 s. In total, each sensor took 88 power measurements. Afterwards, the SNR for each measurement is estimated according to the process described in [8]. The results of the sensing campaign are presented in Figure 6, for a probability of false alarm P fa = 10%.…”

Section: Sensing Performancementioning

confidence: 99%

Combination of a geolocation database access with infrastructure sensing in TV bands

Dionísio

Ribeiro

Marques

et al. 2014

J Wireless Com Network

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This paper describes the implementation and the technical specifications of a geolocation database assisted by a spectrum-monitoring outdoor network. The geolocation database is populated according to Electronic Communications Committee (ECC) report 186 methodology. The application programming interface (API) between the sensor network and the geolocation database implements an effective and secure connection to successfully gather sensing data and sends it to the geolocation database for post-processing. On the other hand, the testbed allows authorized TV white space devices to gain access to the services of the geolocation database, according to a draft implementation of Internet Engineering Task Force (IETF) Protocol to Access White Space (PAWS) Two experimental methodologies are available with the testbed: one focused on coexistence studies with commercial wireless microphones, when the testbed is used for sensing only, and another for demonstration purposes, when the testbed is also used to emulate wireless microphone signals. Overall, this hybrid approach is a promising solution for the effective use of TV white spaces and for the coexistence with digital TV broadcast signals, or dynamic incumbent systems, such as unregistered wireless microphones.

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Testbed for combination of local sensing with geolocation database in real environments

Cited by 20 publications

References 3 publications

TV White Spaces for Digital Inclusion in Brazil

TV White Spaces for Digital Inclusion in Brazil

A Survey on Coexistence in Heterogeneous Wireless Networks in TV White Spaces

Combination of a geolocation database access with infrastructure sensing in TV bands

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