@article{R. Vale_Grivet_Célio B. Brandão_2015, title={Performance of Voice Calls with Rate Matching Optimization in UMTS Networks}, volume={20}, url={https://jcis.sbrt.org.br/jcis/article/view/346}, DOI={10.14209/jcis.2005.19}, abstractNote={<span>Two transmission modes were standardized in UMTS: a Circuit Switched (CS) and a Packet Switched (PS) mode. In both cases, an efficient transmission framework </span><span>was defined to allow the transmission of multimedia information with the required reliability, in spite of the medium characteristics. Multimedia calls are delivered in several transport channels - one for each media related to the call - properly multiplexed in one or more physical channels. These transport channels are designed to attain the required levels of QoS using two main techniques: Channel </span><span>Coding and Rate Matching. In this paper we discuss the creation of transport channels for voice calls in both CS and PS modes and present a new methodology to optimize the Rate Matching parameters for a given channel coder and a set of QoS objectives. With the proposed methodology the maximum Eb/N0 assigned to the transport channels is minimized, thus reducing the transmitted power.</span>}, number={3}, journal={Journal of Communication and Information Systems}, author={R. Vale, Eduardo and Grivet, Marco and Célio B. Brandão, João}, year={2015}, month={Jun.} }