Description:

Abstract—Circuit-Switched (CS) Voice Services over HSPA (CSoHS) was recently introduced for 3GPP WCDMA Release 7/8 systems. The goals of this feature include improving voice and data system capacity by utilizing the improvements offered by the shared packet transport of HSPA air interface, while retaining the already widely deployed core networks. In this paper, we discuss the implementation of CSoHS and analyze its performance via simulations. We show that the system capacity of CSoHS is significantly higher than the Release 99 CS voice under similar system conditions and voice quality. We also discuss and analyze the performance of best effort traffic in the presence of voice users.