PDN GATEWAY DEVICE AND MOBILE COMMUNICATION METHOD

摘要

When a handover of a UE (20) occurs, a P-GW (60) sets a downlink data forwarding path that passes via a Target S-GW and a Target eNB, and when the serving gateway device switches from a Source S-GW to a Target S-GW that manages a Target eNB because of a transition of the UE (20), the P-GW (60) transmits an end marker, which indicates end of forwarding of the downlink data via a Source eNB, to the Source S-GW in accordance with the setting of the downlink data forwarding path.

主权项

1. A PDN gateway device capable of forwarding downlink data addressed to a mobile station toward any one of a source serving gateway device and a target serving gateway device, the PDN gateway device comprising:
a path setting unit that sets, when a transition of the mobile station occurs from a source radio base station to a target radio base station, a downlink data forwarding path, which passes via the target serving gateway device and the target radio base station, to the target serving gateway device; and an end-marker transmitting unit that, when switching of a serving gateway device occurs from the source serving gateway device that manages the source radio base station to the target serving gateway device that manages the target radio base station because of the transition, transmits an end marker, which indicates end of forwarding of the downlink data via the source radio base station, to the source serving gateway device when the downlink data forwarding path is set by the path setting unit.