Information Rate, Service Quality and System Capacity of Wideband Code Division Multiple Access Systems
Zhang Yan,Yan Hongsen,Zhu Shihua
(School of Electronics and Information Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

Abstract: Starting from the sufficient and necessary condition of existence of solution for power assignment in a single cell wideband code division multiple access (WCDMA) system, the quantity relations among the information rate, the capacity and the quality of service(QoS) are acquired. The capacities of constant bit rate(CBR) traffics and variable bit rate(VBR) traffics can be improved through the change of the information rate of VBR traffics. The information rate of VBR traffics can be increased through the change of QoS of the unspecified bit rate(UBR) traffics. The numerical results show that the information rate, QoS, and system capacity are exchangeable. These make the setting of these crucial parameters very flexible and, in turn, result in higher resource utlization and better system performance.
Keywords: WCDMA;power control;CBR traffic;VBR traffic;UBR traffic