Space-time diversity-enhanced QoS provisioning for real-time service over MC-DS-CDMA based wireless networks

In order to support the quality of service (QoS) requirements for real-time traffic over broadband wireless networks, advanced techniques such as space-time diversity (STD) and multicarrier direct-sequence code division multiple access (MC-DS-CDMA) are implemented at the physical layer. However, the employment of such techniques evidently affects the QoS provisioning algorithms at the medium access control (MAC) layer. In this paper, we propose a space-time infrastructure and develop a set of cross-layer real-time QoS-provisioning algorithms for admission control, scheduling, and subchannel-allocations. We analytically map the parameters characterizing the space-time diversity onto the admission-control region guaranteeing the real-time QoS. Our analytical analyses show that the proposed algorithms can effectively support real-time QoS provisioning. Also presented are numerical solutions and simulation results showing that the space-time diversity can significantly improve the QoS provisioning for real-time services over wireless networks.

[1]  David Gesbert,et al.  From theory to practice: an overview of MIMO space-time coded wireless systems , 2003, IEEE J. Sel. Areas Commun..

[2]  Mohamed-Slim Alouini,et al.  Digital Communication Over Fading Channels: A Unified Approach to Performance Analysis , 2000 .

[3]  Kang G. Shin,et al.  A unified wireless LAN architecture for real-time and non-real-time communication services , 2000, TNET.

[4]  A. Robert Calderbank,et al.  Space-Time block codes from orthogonal designs , 1999, IEEE Trans. Inf. Theory.

[5]  Lie-Liang Yang,et al.  Performance of generalized multicarrier DS-CDMA over Nakagami-m fading channels , 2002, IEEE Trans. Commun..

[6]  Lie-Liang Yang,et al.  Space-time spreading assisted broadband MC DS-CDMA , 2002, Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367).

[7]  Jia Tang,et al.  Subchannel-allocation algorithms and performance analysis for space-time OFDM-CDMA based systems in wireless networks , 2004, 2004 IEEE Wireless Communications and Networking Conference (IEEE Cat. No.04TH8733).

[8]  Thomas L. Marzetta,et al.  A transmitter diversity scheme for wideband CDMA systems based on space-time spreading , 2001, IEEE J. Sel. Areas Commun..

[9]  R.M. Buehrer,et al.  Wireless communications: past events and a future perspective , 2002, IEEE Communications Magazine.

[10]  Milica Stojanovic,et al.  Performance of adaptive MC-CDMA detectors in rapidly fading Rayleigh channels , 2003, IEEE Trans. Wirel. Commun..

[11]  Kang G. Shin,et al.  An uplink CDMA system architecture with diverse QoS guarantees for heterogeneous traffic , 1999, TNET.