The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Study on Wave Propagation Characteristics Modeling in Tunnel

터널 환경에서의 전파전파 특성 모델링 연구

  • Jeong, Won-Jeong (Department of Radio Science and Engineering, Chungnam National University) ;
  • Kim, Tae-Hong (Department of Radio Science and Engineering, Chungnam National University) ;
  • Han, Il-Tak (Agency for Defence Development) ;
  • Choi, Moon-Young (Korea Radio Promotion Agency) ;
  • Ryu, Joon-Gyu (Electronics and Telecommunications Research Institute) ;
  • Lee, Ho-Jin (Electronics and Telecommunications Research Institute) ;
  • Pack, Jeong-Ki (Department of Radio Science and Engineering, Chungnam National University)
  • Published : 2009.09.30
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Abstract

In the domestic environments, there are many tunnels since most of terrains have mountains. To ensure the quality of wireless network service in NLOS environment like tunnels which differ from indoor or outdoor wireless channels, researches on wave-propagation characteristics. through such channel are necessary. Especially, in such environment the ground repeater called Gap-Fillers are usually used for satellite mobile services. To make sure that mobile service using satellites in tunnels is available, the research about Gap Filling method is essential. This research is focus on the characterising the wave-propagation through tunnels, to find the appropriate frequency, HPBW of the Gap-Filler antennas, the number of Gap-Fillers, etc. In this paper, we present the effective Gap Filling method in tunnels for ISM band, based on analysis of ray tracing and measurement results.

국내 환경의 경우, 산악 지형이 많은 지형적 특성상 수많은 터널이 존재한다. 터널은 무선 채널 환경 중 대표적인 음영지역으로서 실외 및 실내 환경의 무선 채널과는 다른 특성을 갖기 때문에 터널 환경에서의 안정된 서비스 품질을 확보하기 위해서는 전파 채널의 특성 연구가 필요하다. 특히 위성을 이용한 이동 서비스를 위해서는 터널에 의한 음영지역에서의 정상적인 위성 신호 수신이 필요하며, 이를 위해 Gap-Filler라고 하는 지상 중계기를 운영하게 되는데 이를 이용하기 위해서는 터널 환경에서의 전파전파 특성 분석을 바탕으로 한 Gap Filling 방법 연구가 필수적이다. 따라서 본 논문에서는 음영 지역에서의 정상적인 위성 신호 수신을 위하여 터널 환경에서의 ISM 대역의 전파전파 특성을 분석하고, 이를 바탕으로 효율적인 Gap Filling 방법에 대한 연구를 수행하였다.

Keywords

References

  1. 최명선, 김도윤, 조한신, 문철, 육종관, 박한규, "지하철 터널 환경에서 2.65 GHz 대역 신호의 전파전파 특성", 한국전자파학회논문지, 16(5), pp. 541- 548, 2005년 5월
  2. Y. Kasashima, J. Hirai, "Analysis of propagation characteristics of radio waves in tunnels", IEEE International Symposium on EMC '03, vol. 1, pp. 664-667, May 2003
  3. Y. P. Zhang, Y. Hwang, "Theory of the radio - wave propagation in railway tunnels", IEEE Trans. On Vehicular Technology, vol. 47, no. 3, pp. 1027- 1036, Aug. 1998 https://doi.org/10.1109/25.704857
  4. Joon-Gyu Ryu, Min-su Shin, S. M. Han, D. J. Jang, and Ho-Jin Lee, "The gap filler technology for mobile satellite system", Antennas and Propagation International Symposium, pp. 3033-3036, 2007
  5. D. J. Cichon, T. Zwick, "Ray optical modeling of wireless communications in high-speed railway Tunnels", IEEE VTC 46th Vehicular Technology Conference, vol. 1, pp. 546-550, Apr. 1996
  6. D. Didascalou, M. Dottling, R. Zwick, and W. Wiesbeck, "A novel ray-optical approach to model wave propagation in cerved tunnels", IEEE VTC 50th Vehicular Technology Conference, vol. 4, pp. 2314-2317, Sep. 1999
  7. D. Didascalou, "Ray-density normalization for ray- optical wave propagation modeling in arbitrarily shaped tunnels", IEEE Trans. on AP., vol. 48, no. 9, pp. 1316-1325, Sep. 2000 https://doi.org/10.1109/8.898764
  8. Shin-hon Chen, Shyh-Kang Jeng, "SBR image approach for radio wave propagation in tunnels with and without traffic", IEEE Trans. on Vehicular Technology, vol. 45, no. 3, pp. 570-578, Aug. 1996 https://doi.org/10.1109/25.533772
  9. D. J. Cichon, T. Zwick, and W. Wiesbeck, "Radio link simulations in high-speed railway tunnels", ICAPi - 95. Ninth International Conference on Antenna and Propagation, vol. 2, no. 407, pp. 216- 219, Apr. 1995 https://doi.org/10.1049/cp:19950418
  10. T. Hattori, T. Kato, "The 3-dimensional modeling technique for calculating radio propagation characteristics along railway", Wireless Personal Multimedia Communications, vol. 1. pp. 291-295, Oct. 2002 https://doi.org/10.1109/WPMC.2002.1088179
  11. Y. P. Zhang, Y. Hwang, and R. G. Kouyoumjian, "Ray-optical prediction of radio-wave propagation characteristics in tunnel environments-Part 2: Analysis and measurements", IEEE Trans. Antennas Propagat., vol. 46, pp. 1337-1345, Sep. 1998 https://doi.org/10.1109/8.719977