Patent ID: 8385262

Claim:
A method of transferring data in a dual transfer mode between a mobile communication equipment device and a mobile communication network, the process comprising: carrying out a packet-switched signalling procedure using a GPRS Tunnelling Transport Protocol (GTTP) procedure through a circuit-switched connection established between the mobile communication network and the mobile communication equipment device; establishing a packet-switched connection between the mobile communication network and the mobile communication equipment device; and determining, when a circuit-switched procedure corresponding to the circuit-switched connection is ended, whether the GTTP procedure is running for the packet-switched signalling procedure, and i) when it is determined that the GTTP procedure is ended, beginning a first timer and releasing the circuit-switched connection upon expiration of the first timer, and ii) when it is determined that the GTTP procedure is running, starting a second timer, of a duration longer than the first timer, maintaining the circuit-switched connection for no longer than the duration of the second timer, and releasing the circuit-switched connection at expiration of the second timer.