发明名称 Gateway apparatus, method and system
摘要 When a location of a portable terminal connected to another network beyond a packet communication network side changes, the gateway apparatus that is arranged between a mobile circuit switching network and a packet communication network (IMS network) and that performs mutual conversion between a circuit switching protocol and a packet communication protocol to execute voice communication, exercises control such that at least one of a sequence number and a timestamp in a packet destined to a portable terminal and output to the packet communication network, is made to vary continuously before and after movement of the portable terminal, in case the portable terminal connected to a network beyond the packet communication network side, moves its location.
申请公布号 US8855123(B2) 申请公布日期 2014.10.07
申请号 US201013143140 申请日期 2010.01.06
申请人 NEC Corporation 发明人 Ozawa Kazunori
分类号 H04L12/66;H04M7/12;H04L12/64;H04W36/02;H04W88/16 主分类号 H04L12/66
代理机构 Sughrue Mion, PLLC 代理人 Sughrue Mion, PLLC
主权项 1. A gateway apparatus that is configured to be arranged between a mobile circuit switching network and a packet communication network, said apparatus comprising: a conversion unit configured to perform mutual conversion between a circuit switching protocol and a packet communication protocol to execute voice communication, wherein said conversion unit is configured to exercise control such that at least one of a sequence number and a timestamp in a packet destined to a first terminal and for output to said packet communication network, is configured to be made to vary continuously before and after movement of said first terminal, in case said first terminal connected to said packet communication network or another network beyond said packet communication network, moves the first terminal's location, and a call control unit configured to receive information regarding a location of said first terminal and deciding whether or not an IP address of a packet of a corresponding channel transmitted from said gateway apparatus to said packet communication network changes due to movement of said first terminal, wherein said call control unit is further configured to output an instruction to change a destination IP address to said packetizing unit and to output a movement completion notification to said sequence number/timestamp changing unit, when an IP address of said packet of said corresponding channel changes, and said call control unit is further configured to output information on a call control signal received from said mobile circuit switching network and said packet communication network to a control and analysis unit of said conversion unit.
地址 Tokyo JP