A wireless device initially has simultaneous circuit switched (CS) and
packet switched (PS) services with a non-UMTS network. With the CS and PS
services ongoing, the non-UMTS network transmits a HANDOVER TO UTRAN
COMMAND message to the wireless device to perform a handover to UTRAN
procedure. The HANDOVER TO UTRAN COMMAND message excludes information
used for handing over the PS signaling connections to the UTRAN so that
only CS signaling connections are handed over. The wireless device
receives and parses the HANDOVER TO UTRAN COMMAND message to determine
what signaling connections are being handed over. Upon determining that
only CS signaling connections are being handed over, a radio resource
control (RRC) layer within the wireless device informs an upper layer
within the wireless device that no PS radio access bearers or no PS
signaling connections are present.