Study on Coexistence between WiBro and WLAN in DTV Bands

국문 초록 (Abstract)

본 논문은 DTV 주파수 대역(185 MHz, 481 MHz, 687 MHz)에 WiBro와 무선랜 서비스가 동일 채널 및 인 접 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 Station 과 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 잠 재적 간섭이 가장 큰 경우이고 697 MHz의 할당이 최적의 주파수 대역으로 분석되었다. 본 분석결과는 향후 DTV 주 파수 대역에 WiBro와 무선랜의 할당에 유용하게 활용될 것으로 기대된다.

다국어 초록 (Multilingual 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.

참고문헌 (Reference)

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