公开(公告)号：US20240406089A1

公开(公告)日：2024-12-05

申请号：US18696905

申请日：2021-11-09

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Saki Hatta ,  Hiroyuki Uzawa ,  Shuhei Yoshida ,  Yusuke Sekihara ,  Shoko Oteru ,  Yuko Iinuma ,  Namiko Ikeda

IPC: H04L43/0894 ,  H04L43/0823

Abstract: An embodiment is a traffic monitoring device configured to acquire traffic statistical information of a flow in the monitoring target network, determine whether the acquired traffic statistical information satisfies a predetermined reference for failure detection, capture packets of the flow determined to satisfy the predetermined reference as packets at the time of failure occurrence in the flow, and dynamically update the predetermined reference while the device is still acquiring traffic statistical information of the flow in the monitoring target network.

公开(公告)号：US12010045B2

公开(公告)日：2024-06-11

申请号：US17440241

申请日：2020-04-08

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Tomoaki Kawamura ,  Shoko Oteru ,  Yuta Ukon ,  Shuhei Yoshida

IPC: H04L49/9057 ,  H04L49/9047

CPC classification number: H04L49/9057 ,  H04L49/9047

Abstract: The packet processing apparatus includes a packet memory, a transmission processing unit that writes a plurality of packets to be transmitted to the packet memory to generate a combination packet into which the plurality of packets have been concatenated, a line handling unit that sends packets to a communication line, and a combination packet transfer unit that DMA-transfers the combination packet from the packet memory to the line handling unit. The transmission processing unit writes information on an address in the packet memory of beginning data of an individual packet in the combination packet to a descriptor. The line handling unit separates the DMA-transferred combination packet into a plurality of packets and sends the plurality of packets to the communication line.

公开(公告)号：US11882061B2

公开(公告)日：2024-01-23

申请号：US17619189

申请日：2019-06-24

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Shoko Oteru ,  Shuhei Yoshida ,  Yuta Ukon ,  Namiko Ikeda ,  Koyo Nitta

IPC: H04L49/9057 ,  H04L1/1607 ,  H04L47/28 ,  H04L47/34 ,  H04L49/55

CPC classification number: H04L49/9057 ,  H04L1/1621 ,  H04L47/28 ,  H04L47/34 ,  H04L49/557

Abstract: A data sequence correction method for temporarily saving data with sequence information in a ring buffer and performing sequence correction is provided. The ring buffer includes a number of storage regions, a monitoring section having one or more continuous sequence numbers, and an acceptance section having a first or second sequence number of the monitoring section as a start sequence number and a sequence number immediately preceding the start sequence number of the monitoring section as an end sequence number. The method includes, when a value determined based on a remainder obtained by dividing a sequence number of received data by the number of storage regions is inside the acceptance section, writing the received data in a position of the storage region corresponding to the determined value, and when data are written in the entire monitoring section, reading out all the data in the monitoring section.

公开(公告)号：US11546276B2

公开(公告)日：2023-01-03

申请号：US17057055

申请日：2019-05-09

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Shoko Oteru ,  Tomoaki Kawamura

IPC: H04L49/901 ,  G06F12/02

Abstract: In a recording device, a data memory including a DRAM having a write pointer for each of banks, and a queue control memory that stores an active flag is provided. When frame data is written into a write-target queue, a bank for which an active flag indicates an activated state is selected as a write-target bank among the banks to write the frame data, and if there is no bank for which an active flag indicates an activated state, a bank for which an active flag indicates a deactivated state is selected as a write-target bank, a row address of a write pointer of the bank is activated, and thereafter the frame data is written.

公开(公告)号：US11916763B2

公开(公告)日：2024-02-27

申请号：US17620815

申请日：2019-07-01

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Yuta Ukon ,  Shuhei Yoshida ,  Shoko Oteru ,  Namiko Ikeda ,  Koyo Nitta

IPC: H04L43/026 ,  H04L45/7453

CPC classification number: H04L43/026 ,  H04L45/7453

Abstract: A traffic monitoring apparatus includes: a header analysis circuit configured to acquire one or more identifiers from a header of a received packet; a rule registration circuit configured to convert a rule table including rules in which one or more rule elements are registered for each of the rules into a predetermined format and register the rule table in a rule matching circuit; and the rule matching circuit configured to search for rules to be matched with the acquired identifiers.

公开(公告)号：US11683255B2

公开(公告)日：2023-06-20

申请号：US17604943

申请日：2019-05-14

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Shuhei Yoshida ,  Yuta Ukon ,  Shoko Oteru ,  Namiko Ikeda ,  Koyo Nitta

IPC: H04L43/12 ,  H04L43/0811 ,  H04L43/0829 ,  H04L43/0823 ,  H04L43/0882

CPC classification number: H04L43/12 ,  H04L43/0811 ,  H04L43/0829 ,  H04L43/0847 ,  H04L43/0882

Abstract: An embodiment packet capture device comprises: a packet receiver configured to receive a packet from a network; a packet retainer configured to store the received packet in a memory to temporarily retain the received packet; a failure detector configured to determine a communication failure is present in the network; a capture controller configured to determine an operation stop address such that retention of packets from the network in time periods before and after a detection time point of the communication failure is ensured when the communication failure is detected by the failure detector; and a capture data generator configured to output the packet stored in the memory as capture data when a storage destination address of the packet stored in the memory has reached the operation stop address or when at least a predetermined waiting time period has elapsed from the detection time point of the communication failure.

公开(公告)号：US20220263733A1

公开(公告)日：2022-08-18

申请号：US17628954

申请日：2019-07-23

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Shuhei Yoshida ,  Yuta Ukon ,  Shoko Oteru ,  Namiko Ikeda ,  Koyo Nitta

IPC: H04L43/026 ,  H04L69/22 ,  H04L43/18 ,  H04L43/16 ,  H04L43/04

Abstract: A burst traffic detection device includes a packet receiver configured to receive packets from a network, a flow specification device configured to specify, in accordance with header information of the packets, flow rules, a flow information storage device configured to store flow information of the specified flow rules, a statistical information storage device configured to store statistical information including the total number of packets for each flow rule and/or the total number of bytes for each flow rule, a burst detection device configured to detect the occurrence of burst traffic in accordance with the statistical information, and a detection count storage device configured to store the number of times of the occurrence of burst traffic.

公开(公告)号：US20210141751A1

公开(公告)日：2021-05-13

申请号：US17057067

申请日：2019-05-13

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Tomoaki Kawamura ,  Saki Hatta ,  Shoko Oteru ,  Koji Yamazaki ,  Takahiro Hatano

IPC: G06F13/28 ,  G06F13/16 ,  G06F13/364 ,  G06F13/12

Abstract: A packet processing apparatus includes a line adapter configured to receive packets from a communication line, a packet combining unit configured to generate a combined packet by combining a plurality of packets received from the communication line, a packet memory configured to store packets received from the communication line, and a combined packet transferring unit configured to DMA transfer the combined packet generated by the packet combining unit to the packet memory. The combined packet transferring unit determines an address of start data of each packet inside the combined packet on the packet memory, writes information on the address into the descriptor that is a predetermined data area on a memory, and DMA transfers the combined packet to the packet memory.

公开(公告)号：US20210034559A1

公开(公告)日：2021-02-04

申请号：US17046142

申请日：2019-03-28

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Tomoaki Kawamura ,  Saki Hatta ,  Shoko Oteru ,  Koji Yamazaki ,  Takahiro Hatano

IPC: G06F13/28 ,  G06F13/16 ,  G06F12/1081 ,  H04L12/861

Abstract: A packet processing device includes: a line adapter configured to receive packets from a communication line; a packet combining unit configured to generate a combined packet by combining a plurality of packets received from the communication line; a packet memory configured to store packets received from the communication line; and a combined packet transferring unit configured to DMA transfer the combined packet generated by the packet combining unit to the packet memory. The combined packet transferring unit writes information of an address of first data of each packet inside the combined packet on the packet memory into a descriptor that is a data area on a memory set in advance.

公开(公告)号：US12199844B2

公开(公告)日：2025-01-14

申请号：US17628954

申请日：2019-07-23

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Shuhei Yoshida ,  Yuta Ukon ,  Shoko Oteru ,  Namiko Ikeda ,  Koyo Nitta

IPC: H04L43/026 ,  H04L43/04 ,  H04L43/16 ,  H04L43/18 ,  H04L69/22

Abstract: A burst traffic detection device includes a packet receiver configured to receive packets from a network, a flow specification device configured to specify, in accordance with header information of the packets, flow rules, a flow information storage device configured to store flow information of the specified flow rules, a statistical information storage device configured to store statistical information including the total number of packets for each flow rule and/or the total number of bytes for each flow rule, a burst detection device configured to detect the occurrence of burst traffic in accordance with the statistical information, and a detection count storage device configured to store the number of times of the occurrence of burst traffic.