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Next generation wireless and mobile cellular networks are expected to support multimedia applications with different quality of service (QoS). User mobility and time-varying multipath fading of wireless channels make QoS provisioning a challenging issue in wireless and mobile networks. In order to provide service differentiation and QoS guarantee in such networks, many new technologies have been proposed. Wideband code division multiple access (WCDMA) is the major multiple access technology for the third generation (3G) and beyond mobile communication systems. One major challenge in multimedia services over WCDMA-based networks is QoS provisioning with efficient resource utilization. The allocation and management of radio resources are crucial for such networks, where the scarce wireless spectrum resources are shared by multiple users. On the other hand, in the standard layered networking architecture, each layer is designed and operated independently. However, wireless channels suffer from both interference and inherent instability; moreover, the statistical channel characteristics of different users are different.