Patents by Inventor Kazuyuki Ohtsu
Kazuyuki Ohtsu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8606243Abstract: A mobile network system includes a guidance message control server, a call control server and a plurality of access gateways. The call control server includes a gateway management section that determines an access gateway as a subject of call restriction, a first instructing section that transmits a message transmission instruction to the guidance message control server and a second instructing section that transmits a call restriction instruction to the access gateway. The guidance message control server includes a receiving section that receives the message transmission instruction, an acquisition section that acquires a guidance message data and a transmission section that transmits the guidance message data to a specified multicast group. Each of the access gateways includes a processing section that performs multicast group participation processing for participating in the specified multicast group and a guidance transmission section that transmits the guidance message data to a mobile terminal.Type: GrantFiled: December 15, 2009Date of Patent: December 10, 2013Assignee: Fujitsu LimitedInventors: Kazuyuki Ohtsu, Yuji Tajima, Takashi Mitsuhashi, Kohji Inokawa, Yumi Eguchi
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Patent number: 8346269Abstract: A mobile network system includes a guidance message control server, a call control server and access gateways. The call control server receives a call request notification from a first access gateway, determines whether a second access gateway is connected to a second mobile terminal, transmits a message transmission instruction to the guidance message control server and transmits a response message including a same group specifying information. The guidance message control server receives the message transmission instruction from the call control server, acquires guidance message data specified by a message specifying information and multicast transmits the guidance message data to a multicast group specified by the group specifying information.Type: GrantFiled: December 15, 2009Date of Patent: January 1, 2013Assignee: Fujitsu LimitedInventors: Kazuyuki Ohtsu, Yuji Tajima, Takashi Mitsuhashi, Kohji Inokawa, Yumi Eguchi
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Publication number: 20100167706Abstract: A mobile network system includes a guidance message control server, a call control server and access gateways. The call control server receives a call request notification from a first access gateway, determines whether a second access gateway is connected to a second mobile terminal, transmits a message transmission instruction to the guidance message control server and transmits a response message including a same group specifying information. The guidance message control server receives the message transmission instruction from the call control server, acquires guidance message data specified by a message specifying information and multicast transmits the guidance message data to a multicast group specified by the group specifying information.Type: ApplicationFiled: December 15, 2009Publication date: July 1, 2010Applicant: FUJITSU LIMITEDInventors: Kazuyuki OHTSU, Yuji Tajima, Takashi Mitsuhashi, Kohji Inokawa, Yumi Eguchi
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Publication number: 20100149974Abstract: A mobile network system includes a guidance message control server, a call control server and a plurality of access gateways. The call control server includes a gateway management section that determines an access gateway as a subject of call restriction, a first instructing section that transmits a message transmission instruction to the guidance message control server and a second instructing section that transmits a call restriction instruction to the access gateway. The guidance message control server includes a receiving section that receives the message transmission instruction, an acquisition section that acquires a guidance message data and a transmission section that transmits the guidance message data to a specified multicast group. Each of the access gateways includes a processing section that performs multicast group participation processing for participating in the specified multicast group and a guidance transmission section that transmits the guidance message data to a mobile terminal.Type: ApplicationFiled: December 15, 2009Publication date: June 17, 2010Applicant: FUJITSU LIMITEDInventors: KAZUYUKI OHTSU, YUJI TAJIMA, TAKASHI MITSUHASHI, KOHJI INOKAWA, YUMI EGUCHI
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Publication number: 20100098100Abstract: A media gateway device includes a first specific call control unit performing line connection control of one of plural interconnection units and plural second call control units requesting the first specific call control unit to perform the line connection control of one of the plural interconnection units. The first specific call control unit has a management data storage unit storing management data for determining which one of the plural interconnection units controls which line of the public network. Each of the plural second call control units has a control request unit requesting the first specific call control unit to perform line connection control of one of the plural interconnection units.Type: ApplicationFiled: December 15, 2009Publication date: April 22, 2010Applicant: FUJITSU LIMITEDInventors: Kiyoto Takahashi, Kazuyuki Ohtsu, Yasunari Awagakubo, Masayoshi Mizutani, Haruki Matsuoka, Seiichiro Uchiyama
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Patent number: 7272135Abstract: A gateway apparatus according to the present invention, arranged between each of a plurality of circuit switched networks and the Internet, for transmitting data received from each of the circuit switched network to the Internet.Type: GrantFiled: November 2, 1999Date of Patent: September 18, 2007Assignee: Fujitsu LimitedInventors: Kazuyuki Ohtsu, Hiroko Suzuki, Masayuki Tashiro
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Patent number: 6987757Abstract: When a call is set between a first line switching network of a call-out side and a second line switching network of a call-in side, a first gateway, if receives a call setting message from the first line switching network, transmits a inquiry message to at least one of second gateway. Each of second gateway from which received the inquiry message transmits a response message to the first gateway when a second gateway itself can communicate a call setting message to the second line switching network. Thereafter, the first gateway selects a second gateway for transmitting the call setting message within the second gateways to which transmitted the response message, and transmits the call setting message to the selected second gateway.Type: GrantFiled: November 28, 2000Date of Patent: January 17, 2006Assignee: Fujitsu LimitedInventors: Masanori Akiyama, Kazuyuki Ohtsu
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Patent number: 6788677Abstract: A gateway apparatus connects a packet-switched network to a PSTN, the packet-switched network having a plurality of information terminals connected thereto. The gateway apparatus includes a recognition operation, an incoming call notification operation and a connection operation. The gateway operates (or is configured) to recognize information terminals on the packet-switched network. The incoming call notification operation notifies all the recognized information terminals of an incoming call upon reception of an incoming call from the PSTN. The connection operation connects the PSTN to an information terminal that has responded to the incoming call notification first. An incoming call notification may be sent to all or a plurality of the information terminals on the packet-switched network in a point-to-multipoint communication using a broadcast address or a multi-cast address.Type: GrantFiled: December 31, 1998Date of Patent: September 7, 2004Assignee: Fujitsu LimitedInventors: Noriyuki Fukuyama, Masanobu Morinaga, Masahiro Matsuda, Kazuyuki Ohtsu
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Patent number: 6771637Abstract: This invention is a gateway apparatus arranged between a circuit switched network and the Internet. The gateway apparatus comprises a prior connection section setting a channel on the Internet according to the call setting request received from the circuit switched network before the call setting request is received from the circuit switched network, and a call setting section setting a connection corresponding to the call setting request on the Internet by using the channel set by the prior connection section when the call setting request is received from the circuit switched network.Type: GrantFiled: November 12, 1999Date of Patent: August 3, 2004Assignee: Fujitsu LimitedInventors: Hiroko Suzuki, Kazuyuki Ohtsu
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Patent number: 6724749Abstract: An internet telephony system includes a plurality of switching equipment which accommodate a plurality of terminals which can perform at least one of voice communication and data communication, an internet network including a gate keeper, and a plurality of gateways which connect the plurality of switching equipment to the internet network and make it possible to perform communication through the switching equipment and the internet network by communication protocol conversion.Type: GrantFiled: October 27, 1999Date of Patent: April 20, 2004Assignee: Fujitsu LimitedInventors: Masayuki Tashiro, Kazuyuki Ohtsu, Noriyuki Fukuyama, Masanobu Morinaga, Takahiro Shirakawa, Kenichi Tonomura
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Patent number: 6657995Abstract: In order for a telephone (a public transmission circuit terminal) carrying out voice communication with a terminal with an IT function to simultaneously enjoy an application service function on an LAN, a speech data interface for interfacing speech data between the telephone and a speech unit of a LAN terminal is provided, and a correlation table for correlating the telephone with the data terminal is provided. Further, a non-speech data interface for interfacing non-speech data between the data terminal and the LAN terminal. In case data from the LAN terminal is speech data, the speech data is transmitted via the speech data interface to the telephone. In case data from the LAN terminal is non-speech data, the non-speech data is transmitted via the non-speech data interface to the data terminal.Type: GrantFiled: July 29, 1998Date of Patent: December 2, 2003Assignee: Fujitsu LimitedInventor: Kazuyuki Ohtsu
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Patent number: 6577638Abstract: A gateway is connected to the Internet and a telephone exchange which carries out routing optimization based on a first message and accommodates a plurality of terminals.Type: GrantFiled: November 30, 1999Date of Patent: June 10, 2003Assignee: Fujitsu LimitedInventors: Masayuki Tashiro, Kazuyuki Ohtsu, Hiroko Suzuki