Method to improve the circuit switched services availability to the user

摘要

METHOD OF IMPROVING CIRCUIT SWITCHED SERVICE AVAILABILITY TO USER EQUIPMENT The present invention describes a method of improving circuit switched (CS) services availability to user equipment. In one embodiment, the method includes sending, by a user equipment (UE), at least one location area update (LAU) message to initiate a location update procedure to a CS core network (CN); determining a CS signaling connection which is released due to a failure in the location update procedure; identifying an ongoing packet switched (PS) signaling connection when the CS signaling connection is released; releasing the identified ongoing PS signaling connection; and performing a public landline mobile network (PLMN) selection for obtaining CS services from the network in response to releasing the identified ongoing PS signaling connection. Thus, the present invention provides continuous CS services to the UE even in case of abnormal scenarios. Upon successfully updating the location area with the selected PLMN, the UE can avail both PS and CS services from the core network. Figure 3