GERAN Evolution for Increased Speech Capacity

In order to accommodate the growing traffic demand in GSM cellular networks, several features are continuously being developed to improve the voice capacity of GSM/EDGE radio access network (GERAN). In this paper we investigate the capacity of a GSM network considering the use of some of these features, namely, interference rejection combining (IRC), single-antenna interference cancellation (SAIC), source-adaptive AMR (SA-AMR), dynamic frequency and channel allocation (DFCA), and 8-PSK voice channels. These techniques have been previously investigated individually in the literature, but here we focus on the system-level impact of the interactions among them. We show that the proper combination of these features increases the spectral efficiency of speech channels in GERAN.