Interworking Strategy and Service Continuity between GSM-UMTS-WLAN Radio Technologies
S. Baudet, N. Drevon, Rolf Sigle, Johan De Vriendt · Alcatel telecommunications review · 2003
The introduction of new radio technologies can provide seamless new services using a variety of radio access technologies while ensuring the continuity of legacy services during the evolution from 2G to 3G.