Coexistence of digital terrestrial television and next generation cellular networks in the 700 MHz band

Fuentes, Manuel; Garcia-Pardo, Concepción; Garro, Eduardo; Gómez-Barquero, David; Cardona, Narcís

doi:10.1109/mwc.2014.7000973

Cited by 41 publications

(37 citation statements)

References 3 publications

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“…Moreover, in our future work, we will consider a larger range of system parameters (code rate, IFFT length, guard interval, and higher M-QAM modulations and bandwidth) [40,41].…”

Section: Discussionmentioning

confidence: 99%

Study of coexistence between indoor LTE femtocell and outdoor-to-indoor DVB-T2-Lite reception in a shared frequency band

Polák

Klozar

Kaller

et al. 2015

J Wireless Com Network

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Nowadays, the demand for high-quality multimedia services (video, audio, image, and data) is rapidly increasing. The Digital Video Broadcasting -terrestrial (DVB-T) standard, its second-generation version (DVB-T2), and the Long-Term Evolution (LTE) standard are the most promising systems to fulfill the demand for advanced multimedia services (e.g., high-definition image and video quality), especially in Europe. However, LTE mobile services can operate in a part of the UHF band allocated to DVB-T/T2 TV services previously. The main purpose of this work is to explore the possible coexistences of DVB-T2-Lite and LTE systems in the same shared frequency band (co-channel coexistence) under outdoor-to-indoor and indoor reception conditions. Furthermore, an applicable method for evaluating coexistence scenarios between both systems is shown with a particular example. These coexistence scenarios can be noncritical and critical. In the first case, both systems can coexist without significant performance degradation. In the second one, a partial or full loss of DVB-T2-Lite and/or LTE signals can occur. We consider an indoor LTE femtocell and outdoor-to-indoor DVB-T2-Lite signal reception in a frequency band from 791 up to 821 MHz. Simulations of combined indoor and outdoor signal propagation are performed in MATLAB using 3rd Generation Partnership Project (3GPP) channel models, separately for both DVB-T2-Lite and LTE systems. Correctness of path loss simulation results is verified by measurements. Afterwards, an appropriate linear model is proposed which enables to evaluate the impact of coexistence on performance of both systems in outdoor-to-indoor and indoor-to-indoor reception scenarios. The results are related to an actual location in the building and are presented in floor plans. The floor plans include different coexistence conditions (different power imbalance and different amount of overlay of the radio channels). Service availability of both systems is verified again by measurements. The resulting maps help better understand the effect of coexistence on achievable system performance under different indoor/outdoor reception situations considering real transmission conditions.

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“…Moreover, in our future work, we will consider a larger range of system parameters (code rate, IFFT length, guard interval, and higher M-QAM modulations and bandwidth) [40,41].…”

Section: Discussionmentioning

confidence: 99%

Study of coexistence between indoor LTE femtocell and outdoor-to-indoor DVB-T2-Lite reception in a shared frequency band

Polák

Klozar

Kaller

et al. 2015

J Wireless Com Network

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“…Coexistence issues may arise between different services sharing adjacent portion of the spectrum, such as Digital Terrestrial Television (DTE) and cellular networks operating in the TVWS, as highlighted in [38]. In particular the potential interference caused by the LTE network to the DTT signal in the 700 MHz was studied in [39]. Both these papers conclude that the interference caused by the LTE network can be significant proposing the use of anti-LTE filters to improve the protection of DTT signals, and a case-by-case study of coexistence issues for DTT network planning.…”

Section: Coexistence Challenges For Cr Network In Tvwsmentioning

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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“…In [6] and [7] protection ratio measurements for LTE interfering to DVB-T and DVB-T2 were made. In [8] and [9], possible solutions are proposed to mitigate interference problems between DTT and LTE in adjacent channel, such as increasing the guard band or use low pass filters. After considering several coexistence scenarios and using the measured protection ratios, some planning studies were performed [10].…”

Section: Introductionmentioning

confidence: 99%

Spectrum Sharing for LTE-A and DTT: Field Trials of an Indoor LTE-A Femtocell in DVB-T2 Service Area

Martinez-Pinzon

Cardona

Garcia-Pardo

et al. 2016

IEEE Trans. on Broadcast.

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Abstract-In the near future, many applications such as environmental sensors, smart objects, health sensors and personal devices will be connected to mobile networks requiring additional spectrum. Studies have been made to demonstrate a low occupancy time and locations on the DTT band. This available or unused spectrum have been called "TV-WhiteSpaces". In the 2015 World Radiocommunication Conference, the ITU decided to re-allocate the 700 MHz band (694-790 MHz) for IMT services and also emplaced the discussion of the future use of the DTT band (470-694 MHz) to 2025, for which studies have been requested.In this paper we study a particular case which goes a step beyond the previous ones, as it aims at sharing the same frequency band in the same area between Long Term EvolutionAdvance (LTE-A) and Digital Video Broadcasting -Terrestrial Second generation (DVB-T2) technologies. Those geographical areas that are not covered because the useful DTT signal is obstructed by the environment or it has a limited coverage by the network design can be called "micro-TVWS" (µTVWS). We assume that a DVB-T2 transmitter provides coverage for fixed rooftop reception as a primary service, to a building in which a LTE-A femtocell is installed indoors for local coverage, as a secondary service. The results have been obtained by laboratory emulation and validated through field measurements using professional equipment. Our results provide the technical restrictions of the LTE-A Femtocell, mainly on the maximum allowable Effective Isotropic Radiated Power (EIRP) that could transmit on the DTT band in terms of carrier separation, from co-channel to adjacent band. These results meet the need of spectrum for IMT-Advanced technologies, so spectrum sharing is proposed in this paper as a new solution to make an efficient use of this resource.Index Terms-DVB-T2, LTE-A Femtocell, White Space, Spectrum Sharing, Digital Terrestrial Television, IMT-Advance Technologies. I. INTRODUCTIONhe increasing demand of applications and scenarios that converge on the massive use of mobile communications has led to a need for additional spectrum allocation. New applications such as environmental sensors, smart objects, Manuscript received December 22, 2015; reviewed May 6, 2016; accepted June 7, 2016. This work was supported by the Ministerio de Educación y Ciencia, Spain, ("DEFINE5G" TEC2014-60258-C2-1-R and "ARCO5G" TEC2014-56469-REDT), by the European FEDER funds. health sensors and personal devices will be connected through mobile devices, so an exponential increase in data traffic accessing mobile radio links is expected. The majority of reports published on actual mobile traffic profiles claim that about 50% of voice calls and 70% of the data traffic is generated in indoor scenarios [1]. Cisco Visual Networking Index (VNI) considered that global mobile data traffic will be multiplied by 10 in the next five years, reaching 30. Since radio spectrum is a natural, scarce and highly demanded resource for the use of wide range wireless technologies, governme...

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Coexistence of digital terrestrial television and next generation cellular networks in the 700 MHz band

Cited by 41 publications

References 3 publications

Study of coexistence between indoor LTE femtocell and outdoor-to-indoor DVB-T2-Lite reception in a shared frequency band

Study of coexistence between indoor LTE femtocell and outdoor-to-indoor DVB-T2-Lite reception in a shared frequency band

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

Spectrum Sharing for LTE-A and DTT: Field Trials of an Indoor LTE-A Femtocell in DVB-T2 Service Area

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