METHOD FOR THE USE OF A GSM/UMTS MOBILE COMMUNICATION NETWORK BY A USER EQUIPMENT ATTACHED TO A CORE NETWORK OF AN EVOLVED PACKET SYSTEM (EPS) MOBILE COMMUNICATION NETWORK

摘要

A method for use of a Global System of Mobile Communication (GSM) and Universal Mobile Telecommunication System (UMTS) (GSM/UMTS) mobile communication network by a user equipment attached to a core network of an Evolved Packet System (EPS) mobile communication network, the use of the GSM/UMTS mobile communication network being the result of a fallback operation, includes, prior to an invocation of a service that triggers the fallback operation: performing an updating operation regarding assignment of a Location Area Code (LAC) and/or a serving Mobile Switching Center (MSC) to the user equipment; and/or performing, autonomously by the user equipment, a measurement operation regarding a current General Packet Radio System (GPRS)/EDGE Radio Access Network (GERAN) or UMTS Terrestrial Radio Access Network (UTRAN) (GERAN/UTRAN) radio environment in order to identify potential CSFB target cells of the user equipment.