Co-existence of TV broadcast and wireless systems for public safety networks in the TV white space

L Kabiru ,Насир Фарук ,N T Surajudeen-Bakinde ,Adeseko A Ayeni

doi:10.4314/njtd.v13i2.3

L Kabiru , Насир Фарук + Show 2 more

Open Access

https://doi.org/10.4314/njtd.v13i2.3

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Abstract

The spectrum sharing between primary TV systems (Channels 9 and 35) and Public Safety Networks (PSNs) is presented in this article. The networks to be deployed within Television White Space (TVWS) in Ilorin metropolis of Kwara State operate on a secondary basis spatially, without causing harmful interference to incumbent TV users. In order to guarantee the protection of incumbent TV users both in VHF and UHF bands, minimum separation distances were suggested considering field strengths of 36 dBu and 41 dBu as the protected contours for the two bands respectively. The effects of varying the transmit power and the antenna height of the secondary system on the coverage area are emphasized in this work. Aggregate interference effect from the multiple secondary systems on the TV service coverage was also investigated. The performances of VHF and UHF bands were also verified when used for secondary transmission both at lower and higher transmit power scenarios. The results of this work show that the safety networks can co-exist with the TV systems without causing harmful interference with the suggested separation distances at the edge of the noise-limited service area, where the signal-to-noise ratio is 16 dB as recommended by the International Telecommunication Union-Radio sector (ITU-R). Keywords : PSN, TV systems, Signal-to-Noise Ratio, TV White Space, Service coverage.

Highlights

Public safety is a general term which encompasses law enforcement, response to fire, natural and artificial disasters, medical emergencies, threats to public order and a host of other life-threatening situations (Arthur, 2012)
The focus was on TV channels (NTA-channel 9 and KWTV-channel 35) in Ilorin City of Kwara State, Nigeria and the two TV channels serve as primary systems, while various TV channels in the Television White Space (TVWS) were considered as the secondary systems
With 4 W transmit power for channel 10, the service coverage of a TVBD network in the presence of primary TV signal is reduced by 52.3% under the influence of the minimum and maximum antenna height scenarios, while for the UHF channels it is reduced by average value of 44.4% as Figure 4 depicts

Summary

Introduction

Public safety is a general term which encompasses law enforcement, response to fire, natural and artificial disasters, medical emergencies, threats to public order and a host of other life-threatening situations (Arthur, 2012). The law enforcement agencies, volunteer efforts, medical responder cohorts are augmented with National Emergency Management Agency (NEMA) and non-governmental organizations with the intent to ensure safety. The prompt response to disasters depends on the effectiveness of communication systems and management of relevant information. For instance when a tragic disaster occurs, the emergency response strategy will be established at appropriate level depending on the nature of the disaster, while necessary resources and technical support are mobilized to take emergency response actions and to report relevant developments to the administrative body immediately (Heejoong, 2012). A means of GSMindependent communication is presented in this article

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