| 摘要 |
To provide a method for suitably enabling the resources of a handover-source base station to be released and the post-handover processes of a handover-destination base station to be executed by securely determining a transfer of Last Packet without increasing a packet transmission delay in a handover process in a mobile communication system where a mobile station makes a communication with packets, a base station is provided with a Last Packet determination timer, and the handover source base station or the handover-destination base station activates the timer upon receipt of a handover completion acknowledgment transmitted from an upper node station or according to a resource release instruction after the reception of the handover completion acknowledgment, and determines that Last Packet has been received, upon expiration of the timer.
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