公开(公告)号：US11201898B2

公开(公告)日：2021-12-14

申请号：US17045859

申请日：2019-04-09

申请人： Nippon Telegraph and Telephone Corporation

发明人： Kenjiro Arai ,  Muneaki Ogawa

IPC分类号： G06F15/16 ,  H04L29/06 ,  H04L29/08

摘要： An SIP proxy server 1 includes a forking termination unit 21. The forking termination unit 21 is configured to: in response to receiving an Initial INVITE request message from a originating-side network 6, transmit the Initial INVITE request message to an incoming-side network 7, and in response to receiving an 18X response message at the first time from the incoming-side network, transmit the 18X response message received at the first time to the originating-side network 6. The forking termination unit 21 establishes Early dialog #0 between the SIP proxy server and the originating-side network 6 and establishes Early Dialog #1 that is compatible with an incoming-side terminal 3 that is a transmission source of an 18X response message received at the first time. In response to receiving 18X response message at the second time from the incoming-side network 7, the forking termination unit 21 establishes Early Dialog #2 that is compatible with the incoming-side terminal 3 that is a transmission source of the 18X response message received at the second time.

公开(公告)号：US20230319117A1

公开(公告)日：2023-10-05

申请号：US18204613

申请日：2023-06-01

申请人： Nippon Telegraph and Telephone Corporation

发明人： Muneaki Ogawa ,  Kenjiro Arai ,  Kenichi Hiragi

IPC分类号： H04L65/1016 ,  H04M11/00 ,  H04L65/75 ,  H04L65/1104 ,  H04L65/1046 ,  H04L65/1069

CPC分类号： H04L65/1016 ,  H04M11/00 ,  H04L65/765 ,  H04L65/1104 ,  H04L65/1046 ,  H04L65/1069 ,  H04M11/066

摘要： A network that is to execute transcoding is fixed. IMS networks (SBC 1a and SBC 1b) set an information element that requests either of the IMS networks to execute transcoding into the SDP, and use that information element to select the IMS network (SBC 1a or SBC 1b) that is to execute transcoding between the IMS networks (between SBC 1a and SBC 1b). Then, the selected IMS network executes transcoding of media data.

公开(公告)号：US11444858B2

公开(公告)日：2022-09-13

申请号：US16979979

申请日：2019-03-07

申请人： Nippon Telegraph and Telephone Corporation

发明人： Muneaki Ogawa ,  Kenjiro Arai

IPC分类号： H04L43/08 ,  H04L65/1069 ,  H04L65/65

摘要： It is possible to appropriately avoid erroneous call disconnection between interconnected networks at a low cost without modifying an apparatus in the network. A disconnection monitoring termination apparatus 1 is connected between a first network 100 for monitoring for inability to communicate RTP packets in a second network 200 by using a disconnection monitoring timer and the second network for accommodating terminals that do not send a hold signal, monitors for the inability to communicate the RTP packets in the second network 200 by using the disconnection monitoring timer for second network monitoring having a value smaller than a value of the disconnection monitoring timer of the first network 100, and when detecting the inability to communicate the RTP packets in the second network 200, the disconnection monitoring termination apparatus 1 sends an UPDATE request or a re-INVITE request including an SDP offer in which a direction attribute of “a=recvonly” is set, to the first network 100.

公开(公告)号：US20190166165A1

公开(公告)日：2019-05-30

申请号：US16309612

申请日：2017-07-14

申请人： Nippon Telegraph and Telephone Corporation

发明人： Muneaki Ogawa ,  Kenjiro Arai ,  Kenichi Hiragi

IPC分类号： H04L29/06

摘要： A network that is to execute transcoding is fixed. IMS networks (SBC 1a and SBC 1b) set an information element that requests either of the IMS networks to execute transcoding into the SDP, and use that information element to select the IMS network (SBC 1a or SBC 1b) that is to execute transcoding between the IMS networks (between SBC 1a and SBC 1b). Then, the selected IMS network executes transcoding of media data.

公开(公告)号：US20230269279A1

公开(公告)日：2023-08-24

申请号：US18142143

申请日：2023-05-02

申请人： Nippon Telegraph and Telephone Corporation

发明人： Muneaki Ogawa ,  Kenjiro Arai ,  Kenichi Hiragi

IPC分类号： H04L65/1016 ,  H04M11/00 ,  H04L65/75 ,  H04L65/1104 ,  H04L65/1046 ,  H04L65/1069

CPC分类号： H04L65/1016 ,  H04M11/00 ,  H04L65/765 ,  H04L65/1104 ,  H04L65/1046 ,  H04L65/1069 ,  H04M11/066

摘要： A network that is to execute transcoding is fixed. IMS networks (SBC 1a and SBC 1b) set an information element that requests either of the IMS networks to execute transcoding into the SDP, and use that information element to select the IMS network (SBC 1a or SBC 1b) that is to execute transcoding between the IMS networks (between SBC 1a and SBC 1b). Then, the selected IMS network executes transcoding of media data.

公开(公告)号：US11012478B2

公开(公告)日：2021-05-18

申请号：US16309612

申请日：2017-07-14

申请人： Nippon Telegraph and Telephone Corporation

发明人： Muneaki Ogawa ,  Kenjiro Arai ,  Kenichi Hiragi

IPC分类号： H04L29/06 ,  H04M11/06 ,  H04M11/00

摘要： A network that is to execute transcoding is fixed. IMS networks (SBC 1a and SBC 1b) set an information element that requests either of the IMS networks to execute transcoding into the SDP, and use that information element to select the IMS network (SBC 1a or SBC 1b) that is to execute transcoding between the IMS networks (between SBC 1a and SBC 1b). Then, the selected IMS network executes transcoding of media data.

公开(公告)号：US20230269280A1

公开(公告)日：2023-08-24

申请号：US18142183

申请日：2023-05-02

申请人： Nippon Telegraph and Telephone Corporation

发明人： Muneaki Ogawa ,  KenJiro Arai ,  Kenichi Hiragi

IPC分类号： H04L65/1016 ,  H04M11/00 ,  H04L65/75 ,  H04L65/1104 ,  H04L65/1046 ,  H04L65/1069

CPC分类号： H04L65/1016 ,  H04M11/00 ,  H04L65/765 ,  H04L65/1104 ,  H04L65/1046 ,  H04L65/1069 ,  H04M11/066

摘要： A network that is to execute transcoding is fixed. IMS networks (SBC 1a and SBC 1b) set an information element that requests either of the IMS networks to execute transcoding into the SDP, and use that information element to select the IMS network (SBC 1a or SBC 1b) that is to execute transcoding between the IMS networks (between SBC 1a and SBC 1b). Then, the selected IMS network executes transcoding of media data.

公开(公告)号：US20200344276A1

公开(公告)日：2020-10-29

申请号：US16923358

申请日：2020-07-08

申请人： Nippon Telegraph and Telephone Corporation

发明人： Muneaki Ogawa ,  Kenjiro Arai ,  Kenichi Hiragi

IPC分类号： H04L29/06 ,  H04M11/00

摘要： A network that is to execute transcoding is fixed. IMS networks (SBC 1a and SBC 1b) set an information element that requests either of the IMS networks to execute transcoding into the SDP, and use that information element to select the IMS network (SBC 1a or SBC 1b) that is to execute transcoding between the IMS networks (between SBC 1a and SBC 1b). Then, the selected IMS network executes transcoding of media data.