H - Electricity – 04 – W
Patent
H - Electricity
04
W
H04W 36/00 (2009.01) H04W 36/14 (2009.01)
Patent
CA 2551426
A handover processing system in mobile communication system, implemented in gateway connected to subscriber network including base station in the mobile communication system, public network and IP network and accompanied by movement of radio terminal in the mobile communication system, wherein the gateway comprises line exchanger performing line exchange processing, VoIP connection unit controlling communication function to transmit/receive IP-packetized data to make communication and call control function for the VoIP communication function, handover detector determining whether or not call originating request from the base station is handover call, communication call detector determining whether or not communication source call of handover is present, call information storage unit storing call information, handover source call retriever retrieving handover source call in IP network, and handover processor taking over communication call from communication partner to continue the communication, and performing handover processing of VoIP communication call.
Kishino Fuminori
Yamamoto Keiji
Gowling Lafleur Henderson Llp
Kabushiki Kaisha Toshiba
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