The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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A Transmission Technique for Paging Indicator in OFDM-based Cellular Systems

OFDM 이동통신 시스템의 Paging Indicator 전송 방식

  • 김영준 (중앙대학교 전자전기공학부 디지털통신연구실) ;
  • 유현일 (중앙대학교 전자전기공학부 디지털통신연구실) ;
  • 우경수 (중앙대학교 전자전기공학부 디지털통신연구실) ;
  • 이희수 (한국전자통신연구원) ;
  • 조용수 (중앙대학교 전자전기공학부 디지털통신연구실)
  • Published : 2008.07.30
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Abstract

In this paper, a transmission technique of paging indicator (PI) on the existing preamble is proposed to reduce power consumption of the user equipment in idle mode for OFDM-based cellular systems. Compared with the PI transmission technique using the L1/L2 control channel, the PI transmission technique using preamble has advantages of not requiring additional overhead for PI transmission as well as reducing computational complexity for PI detection. Synchronization and PI detection techniques are descried for OFDM-based cellular systems, especially for mobile WiMAX systems. It is shown by computer simulation that the PI can be transmitted using the preamble (or common synch symbol) without affecting performances of synchronization and cell searching in mobile WiMAX systems.

본 논문에서는 OFDM 기반 이동통신시스템에서 idle mode 단말의 전력 소모를 감소시키기 위하여 기존의 프리앰블에 PI(Paging Indicator) 정보를 추가하여 전송하는 기법을 제안한다. L1/L2 제어채널을 사용하여 PI를 전송하는 기법과 비교하여, 프리앰블을 이용하여 PI를 전송하는 기법은 PI 전송을 위한 추가의 overhead가 필요하지 않을 뿐만 아니라 PI 검출을 위한 복잡도도 감소시킬 수 있다. 본 논문에서는 OFDM 기반 이동통신시스템, 특히 mobile WiMAX 시스템에 적합한 동기화 기법과 PI 검출기법에 대하여 기술한다. 모의실험을 통하여 mobile WiMAX 시스템에서 동기화 성능과 셀 탐색 성능을 크게 열화시키지 않으면서 프리앰블(또는 common synch symbol)을 사용하여 PI를 전송할 수 있음을 확인한다.

Keywords

References

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