公开(公告)号：US20210176177A1

公开(公告)日：2021-06-10

申请号：US17257720

申请日：2019-07-19

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takahiro KUBO ,  Yu NAKAYAMA ,  Hiroyuki UZAWA ,  Daisuke HISANO ,  Yoichi FUKADA

IPC: H04L12/815 ,  H04W28/02

Abstract: A data collection unit of an NW controller (6) collects, from an L2SW (5) constituting an L2NW (4), uplink observation data indicating traffic volume of a session request packet addressed to an application server 2 and downlink observation data indicating traffic volume of a session response packet transmitted from the application server 2, which are acquired by observing packets input to the L2SW (5). A control unit changes shaping rate of the packets addressed to the application server (2) through the L2SW (5) included in the L2NW (4) based on a ratio between the traffic volume indicated by the uplink observation data and the traffic volume indicated by the downlink observation data, or a ratio between an increment of the traffic volume acquired from the uplink observation data and an increment of the traffic volume acquired from the downlink observation data.

公开(公告)号：US20210306362A1

公开(公告)日：2021-09-30

申请号：US17265928

申请日：2019-08-15

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takahiro KUBO ,  Hiroyuki UZAWA ,  Yu NAKAYAMA ,  Daisuke HISANO ,  Yoichi FUKADA

IPC: H04L29/06 ,  H04L12/851 ,  H04L12/721

Abstract: In a communication control system having a plurality of layer 2 switches and a network controller, the network controller includes a determination unit and an instruction unit, the determination unit being configured to determine whether or not a transfer communication flow feature indicating a feature of a communication flow transferred by a layer 2 switch of the plurality of layer 2 switches is similar to an abnormal communication flow feature indicating a feature of a communication flow when an abnormality occurs; and the instruction unit being configured to: output to the layer 2 switch, when the determination unit determines that the transfer communication flow feature is similar to the abnormal communication flow feature, a first instruction to lower priority of transfer processing for the communication flow and a second instruction to duplicate the communication flow to the layer 2 switch; or output the first instruction to the layer 2 switch, and output, to a server detecting a malicious attack, identification information identifying the communication flow having the transfer communication flow feature.

公开(公告)号：US20210266263A1

公开(公告)日：2021-08-26

申请号：US17252346

申请日：2019-06-07

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Takahiro KUBO ,  Yu NAKAYAMA ,  Daisuke HISANO ,  Yoichi FUKADA

IPC: H04L12/815 ,  H04L12/863

Abstract: A communication control apparatus includes an observed data rate acquiring unit configured to acquire observed data rates indicating input data rates of queues, the observed data rates being observed in a layer 2 switch, a threshold value storage unit configured to store predetermined threshold values of the queues, a shaping rate determination unit configured to determine a shaping rate of each queue based on both observed data based on an observed data rate of the observed data rates acquired by the observed data rate acquiring unit and a threshold value of the predetermined threshold values stored in the threshold value storage unit, and a shaping rate setting unit configured to set, in the layer 2 switch, the shaping rate of each queue determined by the shaping rate determination unit.

公开(公告)号：US20210083982A1

公开(公告)日：2021-03-18

申请号：US16965925

申请日：2019-02-01

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Daisuke HISANO ,  Yu NAKAYAMA ,  Takahiro KUBO ,  Youichi FUKADA

IPC: H04L12/851 ,  H04L12/825 ,  H04L12/801

Abstract: A transfer device for coupling a priority signal and a standard signal includes a reception unit configured to receive a plurality of signals transmitted from a device connected to a path different from a forwarding path, a separation unit configured to separate the signals into the priority signal and the standard signal, an identifier reference unit configured to reference an identifier added to the standard signal, an identifier sort unit configured to sort the standard signal by the identifier, a signal coupling unit configured to couple the plurality of standard signals, a multiplexing unit configured to multiplex the priority signal and the standard signal, a priority control unit configured to determine a transfer order of the signals, a transmission unit configured to transmit the signals to a device connected to the forwarding path, an interrupt transfer processing unit configured to perform interrupt processing in a case where the priority signal arrives during transfer of the standard signal, a signal division unit configured to divide the standard signal, an identifier addition unit configured to add the identifier to the standard signal divided, and a transmission suspending unit configured to suspend transfer of the standard signal until transfer of the priority signal is completed.

公开(公告)号：US20210036885A1

公开(公告)日：2021-02-04

申请号：US16965678

申请日：2019-02-01

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Daisuke HISANO ,  Yu NAKAYAMA ,  Takahiro KUBO ,  Youichi FUKADA

IPC: H04L12/40 ,  H04L29/06 ,  H04Q11/00

Abstract: A transfer device for coupling a priority signal and a standard signal and transferring the signal includes a reception unit that receives a plurality of signals transmitted from a device connected to an opposite side of a transfer route, a separation unit that separates the signal into the priority signal and the standard signal, a signal defragmentation unit that defragments the plurality of standard signals, a multiplexing unit that multiplexes each of the priority signal and the standard signal, a priority control unit that determines a transfer order of the signals, a header information copy unit that copy header information of the standard signal, a transmission unit that transmits the signal to a device connected to the transfer route, an interrupt transfer processing unit that perform an interruption process when the priority signal arrives during the transfer of the standard signal, a signal fragmentation unit that fragments the standard signal, a header information assignment unit that assigns the header information to the standard signal, and a transmission delaying unit that delays the transfer of the standard signal until the priority signal has been transferred.