Implementation of Low Cost WiMAX Remote Radio Head with Ethernet

Ethernet을 이용한 저가형 WiMAX RRH 기지국 구현

  • Seo, Seong-Sam (Department of Electronics and Communications Engineering, Kwangwoon University) ;
  • Lee, Hyun-Seok (Department of Electronics and Communications Engineering, Kwangwoon University)
  • 서성삼 (광운대학교 전자통신공학과) ;
  • 이현석 (광운대학교 전자통신공학과)
  • Received : 2011.09.06
  • Accepted : 2012.01.05
  • Published : 2012.01.25

Abstract

This paper is about the implementation of low cost WiMAX remote radio head system with Ethernet instead of optical link. We deployed a simplified frame structure on the data frames transmitted between a basestation and remote radio heads in order to maximize Ethernet link utilization which shows relatively lower maximum throughput compared to that of optical links. In addition, a synchronization mechanism was applied on a basestation and remote radio heads placed on remote sites in order for simultaneous data transmission and reception in all remote radio heads which are essential for proper communication with terminals. These schemes are implemented with FPGA. The results of experiment with a WiMAX Femtocell show that our remote radio head systems efficiently deliver radio frames with proper timing.

본 논문은 광선로 대신 Ethernet을 이용하여 저가형 WiMAX remote radio head (RRH)를 구현한 내용을 담고 있다. 간략화된 프레임 형식을 적용하여 최대 전송률이 상대적으로 낮은 Ethernet 선로의 사용 효율을 극대화하면서 기지국과 RRH들 사이에 데이터 전송이 이루어지도록 하였다. 또한 원격지에 설치되는 기지국과 RRH들이 동시에 무선데이터 송수신할 수 있도록 장치 간 동기화기법을 적용하였다. 설계된 내용은 FPGA 상에 구현되었으며 WiMAX Femtocell과 연동하여 정상적으로 무선데이터를 송수신함을 보였다.

Keywords

References

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