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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Protection of Incumbent Services and Its Impact on Coverage of TV Band Device Networks in TV White Space

  • Kang, Kyu-Min (Broadcasting & Telecommunications Media Research Laboratory, ETRI) ;
  • Park, Jae Cheol (Broadcasting & Telecommunications Media Research Laboratory, ETRI) ;
  • Cho, Sang-In (Broadcasting & Telecommunications Media Research Laboratory, ETRI) ;
  • Park, Seungkeun (Broadcasting & Telecommunications Media Research Laboratory, ETRI)
  • Received : 2014.11.11
  • Accepted : 2015.11.11
  • Published : 2016.02.01
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Abstract

This paper presents a set of candidate regulatory requirements for TV band devices (TVBDs) in the Rep. of Korea. To guarantee the protection of incumbent services, especially digital TV (DTV) and wireless microphones, in TV frequency bands, we suggest minimum separation distances of TVBDs from the noise-limited contour according to incumbent users and TVBD types. This paper also deals with multiple sets of separation distances of a co-channel TVBD network from a DTV protected contour on the basis of the radio propagation characteristics of different geographic areas to make good use of TV white space (TVWS) and safely protect the DTV service. We present a low-power transmission mode of TVBDs and the relevant separation distances for small-cell deployment. The service coverage reduction ratio of a TVBD network is investigated in the presence of DTV interference in four geographic areas. The TVWS field verification results, conducted on the island of Jeju (Rep. of Korea), show that incumbent services operate well without harmful interference from neighboring TVBDs with the proposed separation distances.

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