Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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A Suitable Cell Search Algorithm Using Separated I/Q Channel Cell Specific Scrambling Codes for Systems with Coexisting Cellular and Hot-Spot Cells in Broadband OFCDM Systems

광대역 OFCDM 시스템에서 셀룰러와 핫-스팟 셀들이 공존할 때 분리 I/Q채널 CSSC를 이용한 셀 탐색 알고리즘

  • 김대용 (영남대학교 정보통신공학과) ;
  • 권혁숭 (밀양대학교 정보통신공학과)
  • Published : 2005.12.01
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Abstract

For systems with coexisting cellular and hot-spot cells in broadband orhogonal frequency and code division multiplexing (OFCDM) systems, a suitable cell search algorithm is proposed fur the common pilot channel (CPICH) in the forward link using separated I/Q channel cell specific codes(CSSC), in which the cellular cell specific scrambling code (CCSSC) is assigned to the in-phase (Q) pilot channel of all cellular cells, and the exclusive hot-spot cell specific scrambling code (HSCSSC) group is assigned to the quadrature (Q) pilot channel of all hot-spot cells. Therefore, the proposed algorithm enables a mobile station (MS) to search quickly for the most desirable hot-spot cell due to reducing the effect of CCSSC, when a MS wants to use a mobile internet. The computer simulation results show that the proposed cell search algorithm can achieve faster cell search time performance, compared to conventional cell search methods.

동위상(I) 파일럿 채널에 할당된 셀룰러 셀 CCSSC와 직교위상(Q) 파일럿 채널에 할당된 핫 스팟 셀 HSCSSC가 공존하는 광대역 OFCDM 시스템에 환경하에서 분리된 I/Q채널 CCSC를 이용한 탐색 알고리즘을 제안하였다. 제안된 알고리즘은 이동 기지국에서 무선 인터넷을 사용하고자 할 때 셀룰러 셀 CCSSC의 영향으로 감소하는 최상의 핫 스팟 셀 HSCSSC을 빠르게 추적하는데 적합하다. 시뮬레이션 결과 제안된 셀 추적 알고리즘이 기존의 셀 추적 알고리즘과 비교하여 훨씬 빠른 결과를 수행할 수 있음을 보였다.

Keywords

References

  1. Dong In Kim and Yu Ro Lee, 'I/Q multiplexed code assignment for fast cell search in asynchronous DS/CDMA cellular systems', IEEE Communications Letters, vol. 2,159 - 161, Jun. 1998 https://doi.org/10.1109/4234.681358
  2. H. Atarashi, S. Abeta, M. Sawahashi, 'Variable spreading factor-orthogonal frequency and code division multiplexing (VSF-OFCDM) for broadband packet wireless access', IEICE trans. commu., vol. e86-b, no. 1, Jan. 2003
  3. Y. Ishii, K. Higuchi, M. Sawahashi, 'Three-step cell search algorithm employing synchronization and common pilot channels for OFCDM broadband wireless access', IEICE trans. vol. e85-b, no. 12, dec. 2002
  4. M. Tanno, H. Atarashi, K. Higuchi, and M. Sawahashi, 'Three-step fast cell search algorithm utilizing common pilot channel for OFCDM broadband packet wireless access', IEEE VTC2002-Fall, vol. 3,1575 - 1579, Sept. 2002
  5. M. Tanno, H. Atarashi, K. Higuchi, and M. Sawahashi, 'Fast cell search algorithm for system with coexisting cellular and hot-spot cells suitable for OFCDM forward link broadband wireless access' IEEE VTC 2003-Spring, vol. 1,pp. 133-138, April 2003