DOI QR코드

DOI QR Code

Study on Coexistence between WiBro and WLAN in DTV Bands

DTV 대역에서 WiBro와 무선랜의 상호공존성에 관한 연구

  • Cheng, Yan-Ming (Department of Electronic Information, College of Electrical & Information Engineering, Beihua University) ;
  • Cho, In-Kyoung (Department of Information & Communication Engineering, Kongju National University) ;
  • Shim, Yong-Sup (Department of Information & Communication Engineering, Kongju National University) ;
  • Lee, Il-Kyoo (Department of Electrical, Electronic & Control Engineering, Kongju National University)
  • 정연명 (중국 북화대학교 전기및정보공학대학 전자정보공학부) ;
  • 조인경 (공주대학교 정보통신공학과) ;
  • 심용섭 (공주대학교 정보통신공학과) ;
  • 이일규 (공주대학교 전기전자제어공학부)
  • Received : 2011.03.08
  • Accepted : 2011.06.09
  • Published : 2011.06.30

Abstract

Mutual Interference scenarios between Wireless Broadband (WiBro) and Wireless LAN (WLAN) in DTV bands are assumed. Co-channel interference and adjacent channel interference are respectively evaluated in terms of carrier to interference ratio (C/I) by using Spectrum Engineering Advanced Monte Carlo Analysis Tool (SEAMCAT) based on the Monte-Carlo simulation method. For the simulation, three frequencies such as 185 MHz, 481 MHz and 687 MHz are chosen. Analysis results indicate that interference situation of using frequency of 185 MHz is the worst case, which requires longer protection distance between WiBro MS and WLAN User Equipment (UE), lower transmit power of WiBro Mobile Station (MS) and WiBro Base Station (BS) and WLAN UE and larger guard band. Comparing to cases of using frequency of 185 MHz and 481 MHz, interference situation of using frequency of 687 MHz is slighter. Therefore, using frequency of 687 MHz is easier for coexistence between WiBro and WLAN. Analysis results can be used as reference and guideline when planning the deployment of WiBro and WLAN in DTV bands.

본 논문은 DTV 주파수 대역(185 MHz, 481 MHz, 687 MHz)에 WiBro와 무선랜 서비스가 동일 채널 및 인접 채널에 할당되는 시나리오를 가정한 후, Monte-Carlo 기반의 Spectrum Engineering Advanced Monte Carlo Analysis Tool(SEAMCAT)을 이용한 간섭 분석을 통해 최적의 주파수 대역을 제시하였다. 분석 내용으로 WiBro Mobile Station과 무선랜 User Equipment 사이의 요구되는 보호거리 및 보호 대역, WiBro Mobile Station/Base Station 및 무선랜 User Equipment 의 허용 송신 파워를 분석하였다. 분석 결과, 주파수 대역 185 MHz에 할당할 경우가 상대적으로 잠재적 간섭이 가장 큰 경우이고 697 MHz의 할당이 최적의 주파수 대역으로 분석되었다. 본 분석결과는 향후 DTV 주파수 대역에 WiBro와 무선랜의 할당에 유용하게 활용될 것으로 기대된다.

Keywords

References

  1. "Frequency policy & using technology workshop", Korea Information & Communications Society, pp.8,15, 5th Jun. 2009.
  2. http://www.dtv.gov/whatisdtv.html
  3. White Spaces Report 2Q 2010: "United States TV White paces: Usage & Availability Analysis", Spectrum Bridge, Inc, pp.1-5.
  4. Yan-Ming Cheng,"A Study on Compatibility between DTV and CDMA system",The Institute of Webcasting, Internet and Telecommunication, pp75-82, June, 2010.
  5. Hyun-Jin Hong,"The Impact of Radio Microphone on DTV in Korea",Proceeding of International Conference on Information and Communication Technology (ICICT 2009), pp75-79, August, 2009.
  6. Gordon L. Stuber,"Interference Analysis of TV-Band Whitespace", Proceedings of the IEEE, pp741-754, April, 2009.
  7. Arturas Medeisis, "Spectrum Engineering Advanced Monte Carlo Analysis Tool For Optimisation of Radio Spectrum Usage", European Radio- communications Office, October, 2006.
  8. Seong-kweon Kim, "Interference Analysis based on the Monte-Carlo Method", The Kroea Institue of Electronic Communication Science, pp.61, 8th April, 2008.
  9. Mobile WiMAX - Part I: A Technical Overview and Performance Evaluation, pp31-pp34, WiMAX Forum, August, 2006.
  10. Wonil Roh,"WiMAX Forum TWG Contribution to development of Candidate IMT-Advanced RIT based on IEEE 802.16", IEEE L802.16-09/0085r1, pp9,16, August, 2009
  11. SEAMCAT Handbook, January 2010, ECO.
  12. ERC REPORT 68,"Monte-carlo simulation methodology for the use in sharing and Compatibility studies between different radio services or systems", European Radiocommunications Committee (ERC), February, 2000.