Definition of 4 G scenarios , traffic and mobility characteristics for interoperating UMTS and WLAN networks

in this paper we present system level scenarios and service related traffic analysis for 4 G networks, focusing on UMTS and W-LANs, the two strong candidates for the 4G coexistence scenarios. We first address the mobile and semimobile market growth in the following years for UMTS and WLANs respectively. We then address the services that will be supported by the two radio networks along with their penetration rates. The characteristics of 4G terminals and their impact on services and user mobility are discussed. We also define hotspot areas (such as airports and city center) and examine two interoperability scenarios between UMTS and WLAN radio networks. Traffic and mobility parameters used in the analysis are based on market forecasts and extrapolations from an existing GSM/GPRS network.