Queue-aided BLRU scheme for orthogonal variable spreading-factor code assignment in 3G WCDMA

被引：0

作者：

Chen, JC ^{[1
]}

Chen, WSE ^{[1
]}

机构：

[1] Natl Chung Hsing Univ, Inst Comp Sci, Taichung 40227, Taiwan

来源：

PIMRC 2003: 14TH IEEE 2003 INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS PROCEEDINGS, VOLS 1-3 2003 | 2003年

关键词：

WCDMA; multicode; OVSF code; code assignment; channelization; BLRU;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In 3G WCDMA, orthogonal variable-spreading-factor (OVSF) codes are valuable and scarce resources. Some single-code and multicode assignment algorithms have been proposed to support as many users as possible. Most of the algorithms suffer from a "code-set fragmentation" problem, which definitely increases the call blocking probability (CBP) of a system. In order to resolve this issue, code-exchange and reassignment policies can be applied, but system complexity will also be increased. In this paper, we propose a Queue-aided Best-fit LRU (QBLRU) code assignment scheme to improve system utilization and to obtain lower CBP than that of dynamic optimal reassignment schemes. Simulation results show that the QBLRU scheme has the lowest CBP and the highest utilization and it is an efficient OVSF code assignment scheme.

引用

页码：74 / 78

页数：5

共 12 条

[1] *3GPP, 2002, 25213 3GPP FDD
[2] Wideband DS-CDMA for next-generation mobile communications systems
Adachi, F
Sawahashi, M
Suda, H
[J]. IEEE COMMUNICATIONS MAGAZINE, 1998, 36 (09) : 56 - 69
[3] Cheng RG, 2000, 2000 IEEE 51ST VEHICULAR TECHNOLOGY CONFERENCE, PROCEEDINGS, VOLS 1-3, P2188, DOI 10.1109/VETECS.2000.851660
[4] CHIHLIN I, 1995, P ICC 95, P1060
[5] Dahlman E, 1996, 1996 IEEE 46TH VEHICULAR TECHNOLOGY CONFERENCE, PROCEEDINGS, VOLS 1-3, P1656, DOI 10.1109/VETEC.1996.504039
[6] Spreading codes for direct sequence CDMA and wideband CDMA cellular networks
Dinan, EH
Jabbari, B
[J]. IEEE COMMUNICATIONS MAGAZINE, 1998, 36 (09) : 48 - 54
[7] Dohi T, 1996, IEICE T COMMUN, VE79B, P1326
[8] Lee SJ, 1999, IEEE T VEH TECHNOL, V48, P376, DOI 10.1109/25.752561
[9] Dynamic assignment of orthogonal variable-spreading-factor codes in W-CDMA
Minn, T
Siu, KY
[J]. IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, 2000, 18 (08) : 1429 - 1440
[10] OTTOSSON T, 1999, P IEEE VTC 99 MAY, V2, P1550

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