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


  • 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. 2004 IEEE.

published proceedings


author list (cited authors)

  • Zhang, X., & Tang, J.

complete list of authors

  • Zhang, X||Tang, J

publication date

  • January 1, 2004 11:11 AM