Patent ID: 8238311
Filing Date: 2012-08-07
Classification: H04W

Abstract:
1. A method for handover of a wireless transmit receive unit (WTRU) from a source system to a target system, the method comprising: establishing a tunnel between the WTRU and a core network (CN) of the target system via a first radio transceiver, wherein data communicated via the tunnel received on a physical (PHY) layer of the first radio transceiver is transferred to at least one of a radio resource control layer or a media access control layer of a second radio transceiver using a crossover connection between the first radio transceiver and the second radio transceiver, the first radio transceiver being configured to communicate on a radio access technology (RAT) of the source system and the second radio transceiver being configured to communicate on a RAT of the target system; performing an access procedure with the CN of the target system using the tunnel; and establishing communications with the target system via the second transceiver on the RAT of the target system upon successful completion of the access procedure with the CN of the target system performed via the tunnel.