A framework for analysis of VBR traffic over CDMA

With emerging multi-media wireless applications, there is a need for next-generation W-CDMA to be designed to support variable rate traffic. Several schemes have previously been proposed to support variable rate transmission, namely, variable spreading gain (VSG), multicode transmissions and fixed spreading gain (FSG). In this paper, a universal framework to evaluate and compare the various variable rate transmission schemes in terms of bit error rate (BER), power and required bandwidth is proposed. The framework also provides for the synthesis of the power assignment that delivers a specified BER to heterogeneous variable rate sources under each scheme.

[1]  Henry L. Owen,et al.  Dynamic resource scheduling strategies for QoS in W-CDMA , 1999, Seamless Interconnection for Universal Services. Global Telecommunications Conference. GLOBECOM'99. (Cat. No.99CH37042).

[2]  I Chih-Lin,et al.  Variable spreading gain CDMA with adaptive control for true packet switching wireless network , 1995, Proceedings IEEE International Conference on Communications ICC '95.

[3]  David G. Messerschmitt,et al.  Variable quality of service in CDMA systems by statistical power control , 1995, Proceedings IEEE International Conference on Communications ICC '95.

[4]  I Chih-Lin,et al.  Multi-code CDMA wireless personal communications networks , 1995, Proceedings IEEE International Conference on Communications ICC '95.

[5]  Erik Dahlman,et al.  UMTS/IMT-2000 based on wideband CDMA , 1998, IEEE Commun. Mag..

[6]  Evaggelos Geraniotis,et al.  Optimal power control law for multimedia multirate CDMA systems , 1996, Proceedings of Vehicular Technology Conference - VTC.

[7]  Theodore S. Rappaport,et al.  Wireless communications - principles and practice , 1996 .

[8]  Fumiyuki Adachi,et al.  Wideband DS-CDMA for next-generation mobile communications systems , 1998, IEEE Commun. Mag..

[9]  S. Ramakrishna,et al.  A comparison between single code and multiple code transmission schemes in a CDMA system , 1998, VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151).

[10]  Andrew J. Viterbi,et al.  Erlang Capacity of a Power Controlled CDMA System , 1993, IEEE J. Sel. Areas Commun..