A dynamic code assignment algorithm for quality of service in 3G wireless networks

Emerging third generation (3G) wireless standards promise a "last-mile" solution capable of supporting mobile, wireless Internet service. The Third Generation Partnership Proposal (3GPP) wideband code division multiple access (WCDMA) standard will support data rates up to 2 Mbit/s with orthogonal variable spreading factor (OVSF) codes. This paper presents a dynamic OVSF code assignment algorithm that efficiently shares a WCDMA downlink between data traffic sources with different QoS requirements. Our simulation results verify that the algorithm functions as desired. The QoS guarantees for high QoS traffic are protected, and best effort traffic is able to utilize available bandwidth.