Browse > Article

Efficient Usage of Secondary Scramble Code via Optical Repeater in W-CDMA System  

Jeon, Eun-Sung (연세대학교 전기전자공학과 이동통신 연구실)
Park, Jun-Hyo (연세대학교 전기전자공학과 이동통신 연구실)
Yang, Jang-Hoon (연세대학교 전기전자공학과 이동통신 연구실)
Kim, Dong-Ku (연세대학교 전기전자공학과 이동통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.8C, 2009 , pp. 731-741 More about this Journal
Abstract
Optical repeater is often installed at the isolated area. Spatial separation makes it possible to reduce the inter-code interference when secondary scrambling codes are used for traffic connected through repeater. In this paper, we propose five secondary scrambling code usage scenarios with the aids of optical repeater to maximize the user capacity. In order to evaluate the performance, dynamic system level simulation is performed. We also propose a base station-repeater switching where each active users can change access points by comparing the channel condition from base station and repeater thorough secondary common pilot channel (S-CPICH) signal to noise-interference ratio (SINR). Moreover, primary-secondary scramble code replacing scheme is proposed which replaces secondary scramble code with primary scramble code when a call using primary scramble code is ended and its corresponding OVSF code is available to users using the secondary scramble code
Keywords
W-CDMA; Secondary Scramble Code; Primary Scramble Code; OVSF; Repeater;
Citations & Related Records
연도 인용수 순위
  • Reference
1 (2005) Spreading and Modulation (FDD). 3GPP TS 25.213. [Online]. Available: http://www.3gpp.org
2 Mehta. N.B., Greenstein L.J., Willis. T.M. and Kostic. Z 'Analysis and Results for the Orthogonality Factor in WCDMA Downlinks,' IEEE Trans. Commun. Vol2. No. 6, Nov 2003   DOI   ScienceOn
3 B. Goransson, B. Hagerman, S. Pertersson, 'Advanced antenna systems for WCDMA: Link and system level results',IEEE PIMRC 2000, vol. 1, pp.A.26-A.30, Sep. 2000
4 Y.Li and Y.L.Guan, 'Modified Jake's Model for Simulating Multiple Uncorrelated Fading Waveforms,' IEEE International Conference on Communication, vol.1, pp46-49, 2000.   DOI
5 K. Jeong, J. Cheong, T. Park, T. Kim and S. Park, 'Performance analysis of DS-CDMA reverse link with fiber-optic repeaters', in Proc. IEEE VTC-spring, May 2000
6 K. Hiltunen, 'Using RF Repeaters to Improve WCDMA HSDPA Coverage and Capacity Inside Buildings,' IEEE Int. Symp. Personal Indoor and Mobile Radio Communication, 2006
7 R.Patachaianand and K. Sandrasegaran, 'System-Level Modeling and Simulation of Uplink WCDMA,' Proc. 5th Int. Conf. on Information Technology, pp.1071-1076, 2008
8 Recommendation ITU-R M.1225, Guideline for Evaluation of Radio Transmission Technologies for IMT-2000, 1997
9 Y.Tseng, C.Cha and S.Wu, "Code Placement and Replacement Strategy for Wideband CDMA OVSF Code Tree Management," IEEE Trans. on Mobile Computing, Vol.1, No.4, Oct.-Dec. 2002, pp.293-302   DOI   ScienceOn
10 S.A.Ghorashi, E. Homayounvala, F. Said and A.H. Aghvami, 'Dynamic Simulator for Studying WCDMA Based Hierarchical Cell Structures,' IEEE Int. Symp. Personal Indoor and Mobile Radio Communication, Sep. 2001.
11 Hu Rong and Kimmo Hiltunen, "Performance Investigation of Secondary Scrambling Codes in WCDMA Systems," IEEE VTC-spring, vol 2, pp. 698-702, May 2006
12 D.Staehle, 'On the Code and Soft Capacity of the UMTS FDD Downlink and the Capacity Increase by using a Secondary Scrambling Code,' IEEE Int. Symp. Personal Indoor and Mobile Radio Communication, 2005
13 Maclej J. Nawrocki, M. Dohler and A. H. Aghvami 'Understanding UMTS Radio Network : Modeling, Planning and Automated Optimisation,' John Wiley & Sons, 2006
14 M. Gudmundson, 'Correlation Model for Shadow Fading in Mobile Radio Systems,' Electronics Letters, vol. 27, pp. 2145–2146, 1991   DOI   ScienceOn
15 W. Lee and D. Lee, 'The impact of repeaters on CDMA system performance,' in Proc. IEEE VTC-spring, May, 2000
16 (2005) Physical Channels and Mapping of Transport Channels onto Physical Channels (FDD). 3GPP TS 25.211. [Online]. Available: http://www.3gpp.org
17 Frank Brouwer, "Performance Analysis and Allocation Strategy for the WCDMA Second Scrambling Code," LNCS 3260, pp. 389-398, 2004
18 "IxEV-DV Evaluation Methodology-Addendum (V6)", 3GPP2 WG5 Evaluation Ad Hoc, July 25, 2001
19 Ramiro-Moreno. J, Pedersen K. I. and Morgensen P.E. 'Capacity Gain of Beamforming Techniquesin a WCDMA System Under Channelization Code Constraints,' IEEE Trans. Commun., Vol 3, pp.1199-1208, July 2006
20 H. Holma and A. Toskala, WCDMA for UMTS, 2nd ed., West Syssex: John Wiley & Sons, 2002