Patent ID: 7382750
Filing Date: 2008-06-03
Classification: H04W

Abstract:
1. A method for performing an inter system handover to Universal Terrestrial Radio Access Network (UTRAN) procedure, the method comprising: a wireless device establishing simultaneous circuit switched (CS) and packet switched (PS) services with a first radio access technology (RAT) system; with the CS and PS services ongoing, the first RAT system transmitting a HANDOVER TO UTRAN COMMAND message to the wireless device to perform a handover to UTRAN procedure, the HANDOVER TO UTRAN COMMAND message excluding information used for handing over PS connections to the UTRAN so that the handover to UTRAN procedure hands over only CS connections; the wireless device receiving the HANDOVER TO UTRAN COMMAND message; the wireless device parsing the HANDOVER TO UTRAN COMMAND to determine what connections are handed over during the handover to UTRAN procedure, wherein parsing the HANDOVER TO UTRAN COMMAND to determine what connections are handed over during the handover to UTRAN procedure comprises: in response to the wireless device parsing the HANDOVER TO UTRAN COMMAND message and determining that only CS connections are handed over during the handover to UTRAN procedure, a radio resource control (RRC) layer within the wireless device informing an upper layer within the wireless device that no PS radio access bearers or no PS signaling connections are present.