| 摘要 |
A mobile communication system including an SRNC, a TRNC, and an SGSN. The UE notifies cell movement to the TRNC, and receives, from the TRNC, whether a packet service available in a first cell is available in a second cell, and radio resource information for receiving the packet service in the second cell, and receives the packet service from the second cell. The TRNC requests an authentication for the UE from the SGSN, and receives, from the SGSN, information on whether the UE can receive the packet service, and packet service information for the packet service the UE is receiving in the first cell, if the UE can, and transmits, to the UE, whether the packet service is available, and radio resource information for providing the packet service. The SGSN transmits, to the TRNC, information on whether the UE can the packet service, and packet service information.
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