Patents by Inventor Takayuki Hama
Takayuki Hama 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: 11288087Abstract: A service providing system includes a control server and a physical resource(s) controlled by the control server. The control server has a virtual device providing unit(s) that provides at least one virtual object for controlling a physical resource(s), and a virtual infrastructure providing unit(s) that can provide, as a virtual object(s), a virtual infrastructure(s) configured using at least one virtual object provided by the virtual device providing unit(s), wherein the virtual infrastructure providing unit(s) can configure a virtual infrastructure(s) using the virtual object(s) provided by the virtual infrastructure providing unit(s), and can provide the virtual infrastructure(s) as a virtual object(s).Type: GrantFiled: December 31, 2018Date of Patent: March 29, 2022Assignee: NEC CORPORATIONInventors: Hideyuki Shimonishi, Takayuki Hama, Takeharu Yasuda, Yuki Tanaka, Shuji Ishii, Masanori Takashima
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Publication number: 20190213031Abstract: A service providing system includes a control server and a physical resource(s) controlled by the control server. The control server has a virtual device providing unit(s) that provides at least one virtual object for controlling a physical resource(s), and a virtual infrastructure providing unit(s) that can provide, as a virtual object(s), a virtual infrastructure(s) configured using at least one virtual object provided by the virtual device providing unit(s), wherein the virtual infrastructure providing unit(s) can configure a virtual infrastructure(s) using the virtual object(s) provided by the virtual infrastructure providing unit(s), and can provide the virtual infrastructure(s) as a virtual object(s).Type: ApplicationFiled: December 31, 2018Publication date: July 11, 2019Applicant: NEC CORPORATIONInventors: Hideyuki Shimonishi, Takayuki Hama, Takeharu Yasuda, Yuki Tanaka, Shuji Ishii, Masanori Takashima
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Patent number: 10210008Abstract: A service providing system includes a control server and a physical resource(s) controlled by the control server. The control server has a virtual device providing unit(s) that provides at least one virtual object for controlling a physical resource(s), and a virtual infrastructure providing unit(s) that can provide, as a virtual object(s), a virtual infrastructure(s) configured using at least one virtual object provided by the virtual device providing unit(s), wherein the virtual infrastructure providing unit(s) can configure a virtual infrastructure(s) using the virtual object(s) provided by the virtual infrastructure providing unit(s), and can provide the virtual infrastructure(s) as a virtual object(s).Type: GrantFiled: July 30, 2010Date of Patent: February 19, 2019Assignee: NEC CORPORATIONInventors: Hideyuki Shimonishi, Takayuki Hama, Takeharu Yasuda, Yuki Tanaka, Shuji Ishii, Masanori Takashima
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Patent number: 10200307Abstract: A communication system comprises control devices, and forwarding nodes each includes packet processing unit that performs processing of a received packet based on a processing rule set in advance or received from control device associated with the node. First control device among the control devices, in response to a predetermined trigger, refers to correspondence between forwarding nodes and control devices, and transmits, among forwarding path information, at least forwarding path information that includes a forwarding node associated with the first control device, to second control device associated with a forwarding node that is not associated with first control device, among forwarding nodes on a forwarding path of the received packet. Second control device generates and sends the processing rule to a forwarding node on the forwarding path, among forwarding nodes associated with the second control device, based on the forwarding path information.Type: GrantFiled: September 15, 2016Date of Patent: February 5, 2019Assignee: NEC CorporationInventors: Junichi Yamato, Takayuki Hama, Satoshi Hieda, Satoshi Uchida
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Patent number: 10075338Abstract: Communication allowance determination means determines, using information of a packet received by a packet relay unit and based on a policy which is information associating a match condition with communicability information, whether to allow or not to allow communication to a destination unit for the packet that meets the match condition, the match condition being information identifying the packet, and the communicability information indicating whether to allow or not to allow the communication to the destination unit for the packet that meets the match condition. Rule setting means sets, at least in the packet relay unit receiving the packet, a rule of executing a process for suppressing forwarding of the packet to the destination unit, on condition that the communication allowance determination means determines not to allow the communication to the destination unit for the packet that meets the match condition.Type: GrantFiled: November 11, 2016Date of Patent: September 11, 2018Assignee: NEC CorporationInventors: Takayuki Hama, Junichi Yamato, Yasunobu Chiba
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Publication number: 20170063619Abstract: Communication allowance determination means determines, using information of a packet received by a packet relay unit and based on a policy which is information associating a match condition with communicability information, whether to allow or not to allow communication to a destination unit for the packet that meets the match condition, the match condition being information identifying the packet, and the communicability information indicating whether to allow or not to allow the communication to the destination unit for the packet that meets the match condition. Rule setting means sets, at least in the packet relay unit receiving the packet, a rule of executing a process for suppressing forwarding of the packet to the destination unit, on condition that the communication allowance determination means determines not to allow the communication to the destination unit for the packet that meets the match condition.Type: ApplicationFiled: November 11, 2016Publication date: March 2, 2017Inventors: Takayuki HAMA, Junichi YAMATO, Yasunobu CHIBA
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Patent number: 9577920Abstract: A communication system includes a plurality of nodes each including a packet processor that processes a packet in accordance with a packet handling operation(s) when the packet is received, the packet handling operation(s) correlating a processing to be applied to the packet with a matching rule that identifies the packet to which the processing is to be applied, and a control device that calculates a packet forwarding path in response to a request to set the packet handling operation from any one of the nodes; the control device setting a plurality of the packet handling operations that implement the packet forwarding path for the node(s) on the packet forwarding path and recording the packet handling operations in correlation with one another, the control device inquiring at the node(s) on the packet forwarding path about a setting state(s) of the packet handling operation(s).Type: GrantFiled: November 18, 2015Date of Patent: February 21, 2017Assignee: NEC CorporationInventors: Junichi Yamato, Takayuki Hama
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Publication number: 20170005950Abstract: A communication system comprises control devices, and forwarding nodes each includes packet processing unit that performs processing of a received packet based on a processing rule set in advance or received from control device associated with the node. First control device among the control devices, in response to a predetermined trigger, refers to correspondence between forwarding nodes and control devices, and transmits, among forwarding path information, at least forwarding path information that includes a forwarding node associated with the first control device, to second control device associated with a forwarding node that is not associated with first control device, among forwarding nodes on a forwarding path of the received packet. Second control device generates and sends the processing rule to a forwarding node on the forwarding path, among forwarding nodes associated with the second control device, based on the forwarding path information.Type: ApplicationFiled: September 15, 2016Publication date: January 5, 2017Inventors: Junichi YAMATO, Takayuki Hama, Satoshi Hieda, Satoshi Uchida
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Publication number: 20160072700Abstract: A communication system includes a plurality of nodes each including a packet processor that processes a packet in accordance with a packet handling operation(s) when the packet is received, the packet handling operation(s) correlating a processing to be applied to the packet with a matching rule that identifies the packet to which the processing is to be applied, and a control device that calculates a packet forwarding path in response to a request to set the packet handling operation from any one of the nodes; the control device setting a plurality of the packet handling operations that implement the packet forwarding path for the node(s) on the packet forwarding path and recording the packet handling operations in correlation with one another, the control device inquiring at the node(s) on the packet forwarding path about a setting state(s) of the packet handling operation(s).Type: ApplicationFiled: November 18, 2015Publication date: March 10, 2016Inventors: Junichi Yamato, Takayuki Hama
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Patent number: 9197494Abstract: A communication system includes a plurality of nodes and a control device. Each node includes a packet processor that processes a packet in accordance with a processing rule when the packet is received. The processing rule correlates the processing applied to the packet with a matching rule that identifies the packet the processing is to be applied to. The control device calculates a packet forwarding path in response to a request for setting processing rules from any node, sets processing rules that implement the packet forwarding path on the node on the packet forwarding path and records the processing rules in a manner coordinated with one another. The control device inquires at the node on the packet forwarding path about state of setting of processing rule and, upon detecting failure in the processing rule set in at least one node, executes rollback operation on the correlated processing rules set in other node.Type: GrantFiled: September 7, 2011Date of Patent: November 24, 2015Assignee: NEC CorporationInventors: Junichi Yamato, Takayuki Hama
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Patent number: 9083612Abstract: When calculating a forwarding path for a packet, a control apparatus determines a second node on the exit side of the packet forwarding path and an output port thereof. Next, the control apparatus sets in a second node located upstream of the first node on the packet forwarding path a packet handling operation for writing flow identification information associated with the output port in a packet header field not to be referred to when the first node forwards the packet and rewriting address information in the packet header such that the packet arrives at the second node on the exit side, and then causing the packet to be forwarded. A packet handling operation for causing the packet with the flow identification information given thereto to be transmitted from the port associated with the flow identification information is set in the second node on the exit side.Type: GrantFiled: August 19, 2011Date of Patent: July 14, 2015Assignee: NEC CORPORATIONInventors: Takayuki Hama, Masashi Numata
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Patent number: 9043477Abstract: A communication system includes a plurality of terminals and a server that relays packet data transmitted and received between a first terminal and a second terminal among the plurality of terminals. The server includes a connection establishment message processing unit configured to transmit a first SYN ACK message that is a response message to a first SYN message transmitted from the first terminal for establishing a TCP connection upon receiving the first SYN message from the first terminal, and an option information notifying unit configured to transmit a first TCP option information notifying message that includes first TCP option information included in the first SYN message from the first terminal and first communication destination information to indicate the second terminal as a destination of communication.Type: GrantFiled: January 5, 2009Date of Patent: May 26, 2015Assignee: NEC CORPORATIONInventors: Yuichi Ishikawa, Ichiro Yamaguchi, Takayuki Hama
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Patent number: 8929212Abstract: A communication quality monitoring device is provided which determines communication quality deterioration by variation of a transmission buffer length in session control irrespectively of generation/non-generation of a data loss. A packet transmission and quality monitoring device 11-1 which detects deterioration in communication quality based on a buffer length of a session control protocol includes a threshold value calculating unit 11-17 which calculates a threshold value for the determination of deterioration in communication quality according to a parameter related to congestion detection of the session control protocol, and a deterioration determining unit 11-18 which determines deterioration in communication quality by comparing the threshold value and the buffer length.Type: GrantFiled: December 18, 2009Date of Patent: January 6, 2015Assignee: NEC CorporationInventors: Takayuki Hama, Masahiro Jibiki
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Publication number: 20130201821Abstract: A communication system includes a plurality of nodes and a control device. Each node includes a packet processor that processes a packet in accordance with a processing rule when the packet is received. The processing rule correlates the processing applied to the packet with a matching rule that identifies the packet the processing is to be applied to. The control device calculates a packet forwarding path in response to a request for setting processing rules from any node, sets processing rules that implement the packet forwarding path on the node on the packet forwarding path and records the processing rules in a manner coordinated with one another. The control device inquires at the node on the packet forwarding path about state of setting of processing rule and, upon detecting failure in the processing rule set in at least one node, executes rollback operation on the correlated processing rules set in other node.Type: ApplicationFiled: September 7, 2011Publication date: August 8, 2013Applicant: NEC CorporationInventors: Junichi Yamato, Takayuki Hama
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Publication number: 20130148667Abstract: When calculating a forwarding path for a packet, a control apparatus determines a second node on the exit side of the packet forwarding path and an output port thereof. Next, the control apparatus sets in a second node located upstream of the first node on the packet forwarding path a packet handling operation for writing flow identification information associated with the output port in a packet header field not to be referred to when the first node forwards the packet and rewriting address information in the packet header such that the packet arrives at the second node on the exit side, and then causing the packet to be forwarded. A packet handling operation for causing the packet with the flow identification information given thereto to be transmitted from the port associated with the flow identification information is set in the second node on the exit side.Type: ApplicationFiled: August 19, 2011Publication date: June 13, 2013Inventors: Takayuki Hama, Masashi Numata
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Publication number: 20120158938Abstract: A service providing system includes a control server and a physical resource(s) controlled by the control server. The control server has a virtual device providing unit(s) that provides at least one virtual object for controlling a physical resource(s), and a virtual infrastructure providing unit(s) that can provide, as a virtual object(s), a virtual infrastructure(s) configured using at least one virtual object provided by the virtual device providing unit(s), wherein the virtual infrastructure providing unit(s) can configure a virtual infrastructure(s) using the virtual object(s) provided by the virtual infrastructure providing unit(s), and can provide the virtual infrastructure(s) as a virtual object(s).Type: ApplicationFiled: July 30, 2010Publication date: June 21, 2012Inventors: Hideyuki Shimonishi, Takayuki Hama, Takeharu Yasuda, Yuki Tanaka, Shuji Ishii, Masanori Takashima
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Publication number: 20120044935Abstract: Communication allowance determination means determines, using information of a packet received by a packet relay unit and based on a policy which is information associating a match condition with communicability information, whether to allow or not to allow communication to a destination unit for the packet that meets the match condition, the match condition being information identifying the packet, and the communicability information indicating whether to allow or not to allow the communication to the destination unit for the packet that meets the match condition. Rule setting means sets, at least in the packet relay unit receiving the packet, a rule of executing a process for suppressing forwarding of the packet to the destination unit, on condition that the communication allowance determination means determines not to allow the communication to the destination unit for the packet that meets the match condition.Type: ApplicationFiled: September 21, 2011Publication date: February 23, 2012Applicant: NEC CORPORATIONInventors: Takayuki Hama, Junichi Yamato, Yasunobu Chiba
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Publication number: 20110317701Abstract: A communication system comprises control devices, and forwarding nodes each includes packet processing unit that performs processing of a received packet based on a processing rule set in advance or received from control device associated with the node. First control device among the control devices, in response to a predetermined trigger, refers to correspondence between forwarding nodes and control devices, and transmits, among forwarding path information, at least forwarding path information that includes a forwarding node associated with the first control device, to second control device associated with a forwarding node that is not associated with first control device, among forwarding nodes on a forwarding path of the received packet. Second control device generates and sends the processing rule to a forwarding node on the forwarding path, among forwarding nodes associated with the second control device, based on the forwarding path information.Type: ApplicationFiled: July 25, 2011Publication date: December 29, 2011Applicant: NEC CorporationInventors: Junichi Yamato, Takayuki Hama, Satoshi Hieda, Satoshi Uchida
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Patent number: 8085669Abstract: A session relay device which can reliably send a data packet from a source to a destination without the need for reconfiguring and dividing a segment is supplied. Session relay device 110, adapted to be disposed between terminals for transmitting and receiving data as packets to which sequence numbers representative of the order of segments to be transmitted are assigned, includes session relay section 110-3 that relays data transmitted as packets between a first session opened between session relay device 110 and a terminal on a transmission side and a second session opened between session relay device 110 and a terminal on a reception side. Session relay section 110-3 receives the retransmitted segment from a terminal on the transmission side, updates a maximum segment size of the second session with the segment size of the retransmitted segment, and transmits the retransmitted segment to a terminal on the reception side.Type: GrantFiled: November 2, 2006Date of Patent: December 27, 2011Assignee: NEC CorporationInventor: Takayuki Hama
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Publication number: 20110255437Abstract: A communication quality monitoring device is provided which determines communication quality deterioration by variation of a transmission buffer length in session control irrespectively of generation/non-generation of a data loss. A packet transmission and quality monitoring device 11-1 which detects deterioration in communication quality based on a buffer length of a session control protocol includes a threshold value calculating unit 11-17 which calculates a threshold value for the determination of deterioration in communication quality according to a parameter related to congestion detection of the session control protocol, and a deterioration determining unit 11-18 which determines deterioration in communication quality by comparing the threshold value and the buffer length.Type: ApplicationFiled: December 18, 2009Publication date: October 20, 2011Inventors: Takayuki Hama, Masahiro Jibiki