OVSF code tree management for UMTS with dynamic resource allocation and class-based QoS provision
Huei-Wen Ferng, Jin-Hui Lin, Yuan‐Cheng Lai, Yung-Ching Chen · 2006
Rather than simply keeping the code tree as com- pact as possible merely depending on the request rate, we design a scheme on the orthogonal variable spreading factor (OVSF) code tree management for the universal mobile telecommunication system (UMTS) by further considering characteristics of traffic and dynamic resource allocation (DRA) to make the management efficient and satisfy different quality-of-service (QoS) require- ments requested by diverse multimedia applications. Through simulations, we demonstrate that the proposed scheme can not only adequately take care of QoS requirements but also significantly reduce the number of code reassignment, making it charming and more suitable for the real and complicated system.