Analysis of TV White Space Availability in Japan

Shimomura, Tsuyoshi; Oyama, Teppei; Seki, Hiroyuki

doi:10.1109/vtcfall.2012.6399270

Cited by 26 publications

(5 citation statements)

References 3 publications

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“…Several papers have focused on TVWS availability in the USA, the UK, and some other European countries [1] [7][8] [9]. We have also estimated TVWS availability in Japan and found that more than 20 TVWS channels are available in central Tokyo [10] [11].…”

Section: Introductionmentioning

confidence: 94%

TV white space availability in Japan estimated using D/U-based and I/N-based protection rules

Oyama

Shimomura

Seki

2012

2012 IEEE Global Communications Conference (GLOBECOM)

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This paper reports estimates of TV white space (TVWS) availability in Japan that are based on the separation distances calculated using D/U-based and I/N-based rules. Calculating the TVWS availability with various TVWS-device parameters-antenna height, transmission power, protected area threshold, and adjacent channel leakage ratio (ACLR)-revealed the parameter dependence of the availability of TVWS channels. The effect of changing the protected area threshold is shown to differ between D/U-based and I/N-based rules: only in D/U-based rule do both separation distance and protected area decrease when the protected area threshold increases. We also show that the effect of the ACLR is smaller than that of the other parameters. Our estimates can be utilized as reference data showing how changes in TVWS availability depend on various TVWS device parameters.

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Section: Introductionmentioning

confidence: 94%

TV white space availability in Japan estimated using D/U-based and I/N-based protection rules

Oyama

Shimomura

Seki

2012

2012 IEEE Global Communications Conference (GLOBECOM)

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“…It can be argued that the availability of significant white space spectrum might pose a challenge in its implementation with 5G, however, recent surveys in technologically mature locations have yielded excessive amount of white spaces in the TV band. During a study in Japan, more than 100 MHz of TVWS has been observed in about 84.3% of the country's area [24]. In USA, about 79% of the spectrum is unused whereas this figure is 56% for the European region [25].…”

Section: Use Of Tvws With 5g Architecturementioning

confidence: 99%

Feasibility, architecture and cost considerations of using TVWS for rural Internet access in 5G

Khalil

Qadir

Onireti

et al. 2017

2017 20th Conference on Innovations in Clouds, Internet and Networks (ICIN)

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Abstract-The cellular technology is mostly an urban technology that has been unable to serve rural areas well. This is because the traditional cellular models are not economical for areas with low user density and lesser revenues. In 5G cellular networks, the coverage dilemma is likely to remain the same, thus widening the rural-urban digital divide further. It is about time to identify the root cause that has hindered the rural technology growth and analyse the possible options in 5G architecture to address this issue. We advocate that it can only be accomplished in two phases by sequentially addressing economic viability followed by performance progression. We deliberate how various works in literature focus on the later stage of this 'two-phase' problem and are not feasible to implement in the first place. We propose the concept of TV band white space (TVWS) dovetailed with 5G infrastructure for rural coverage and show that it can yield cost-effectiveness from a service provider's perspective.

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“…It is assumed that each broadband user needs a guarantee of R bits/second and α is the fraction of population active (on an average) at a given time. 4 So, αRN i is the amount of data generated for uplink at transmission node i ∈ T . The value of α is specified with demography information in the optimization tool in Fig.…”

Section: System Details and Modeling Assumptionsmentioning

confidence: 99%

“…The amount of TV white space available in countries such as US, UK, and Japan varies depending on the geographical locations and is fragmented in frequency. Quantitative assessments have shown that the amount of spectrum available as TV white spaces in these countries is limited [1], [2], [3], [4], [5].…”

Section: Introductionmentioning

confidence: 99%

How much TV UHF band spectrum is sufficient for rural broadband coverage?

Kumar

Rathod

et al. 2015

2015 13th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)

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Unlike in the developed countries, TV white spaces are abundant in India and rural broadband coverage is negligible. Government of India has an ambitious plan to connect 250,000 rural offices (Gram Panchayat) using optical fiber based point of presence (PoP); this will allay, but not solve the rural broadband coverage problem.In this work, a middle-mile multihop mesh network operating in the TV UHF band is presented as a solution to providing seamless connectivity between the Gram Panchayat and village users. This network can coexist with TV broadcasting via the License Shared Access mechanism. The main contribution of this paper is a throughput optimization tool. Given the demography information of rural areas, the desired broadband speed and contention ratio, available frequency, location of fiber PoP, and propagation path-loss models of the TV UHF band-our optimization tool computes optimal power and routing for the multihop mesh network. The analysis is performed at the physical layer. Time division multiple access and spatial reuse of frequency are used for interference management in this work. Simply put, given demography information, our optimization tool determines at what power will broadband coverage will be feasible in the rural areas. This tool's design is separable and it can be utilized in other areas of the world, where demography and path-loss models can be replaced. Our optimization tool will be exemplified using results from one demographic region in India.

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Analysis of TV White Space Availability in Japan

Cited by 26 publications

References 3 publications

TV white space availability in Japan estimated using D/U-based and I/N-based protection rules

TV white space availability in Japan estimated using D/U-based and I/N-based protection rules

Feasibility, architecture and cost considerations of using TVWS for rural Internet access in 5G

How much TV UHF band spectrum is sufficient for rural broadband coverage?

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