A Dynamic Channel Allocation Based on Path Gain with Buffer for TDD-CDMA System

Li Pei; Wu Wei-ling

doi:10.3724/SP.J.1146.2005.01441

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Li Pei, Wu Wei-ling. A Dynamic Channel Allocation Based on Path Gain with Buffer for TDD-CDMA System[J]. Journal of Electronics & Information Technology, 2007, 29(7): 1564-1568. doi: 10.3724/SP.J.1146.2005.01441

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Li Pei, Wu Wei-ling. A Dynamic Channel Allocation Based on Path Gain with Buffer for TDD-CDMA System[J]. Journal of Electronics & Information Technology, 2007, 29(7): 1564-1568. doi: 10.3724/SP.J.1146.2005.01441

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A Dynamic Channel Allocation Based on Path Gain with Buffer for TDD-CDMA System

doi: 10.3724/SP.J.1146.2005.01441

Li Pei,
Wu Wei-ling

Received Date: 2005-11-09
Rev Recd Date: 2006-06-30
Publish Date: 2007-07-19

Abstract

Abstract

The TDD-CDMA system with unbalanced slot allocation between uplink (UL) and downlink (DL) will cause the cross-slot interference which may be inferior to system. In order to decrease the interference, a Dynamic Channel Allocation (DCA) based on path gain with buffer (PGBDCA) strategy is proposed. In PGBDCA, the cell is divided into three regions: besides inner and outer region, the PGBDCA introduce the buffer region to manage the slots in which path gain is near to threshold. With static system level simulation, the PGBDCA algorithm shows better performances than conventional algorithms in terms of the probability of the access users. The simulation result also shows the position and size of the buffer are the key factors that will influence on the performance of the system.

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References(1)

References

[1] Povey G J R and Nakagawa M. A review of time division duplex CDMA techniques, in Proc. ISSSTA98, Sun City, South Africa 1998: 630-633. [2] Shin S M, Cho Chepl-Hye, and Sung Dan Keun. Interference-based channel assignment for DS-CDMA cellular systems[J].IEEE Trans. on Vehicula Technology.1999, 48(1):233-239 [3] Nasreddine J and Lagrange X. Time slot allocation based on a path gain division scheme for TD-CDMA TDD systems[J].VTC 2003-Spring. The 57th IEEE Semiannual, Dallas, TX, U.S.A 22-25 April.2003, Vol.2:1410-1414 [4] Holma H.[J].Povey G J R, and Toskala A. Evaluation of interference between uplink and downlink in UTRA/TDD. Proceedings on VTC99 Fall, Amsterdam, Netherlands.1999,:- [5] Jeon W S and Jeong D G. Comparison of time slot allocation strategies for CDMA/TDD Systems[J].IEEE Journal on Selected Areas in Communications.2000, 18(7):1271-1278 [6] 3GPP. Selection procedures for the choice of radio transmission technologies of the UMTS. TR 101 112 V3.1.0 (1997-ll).

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