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：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：US11374874B2

公开(公告)日：2022-06-28

申请号：US17290342

申请日：2019-10-23

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Yuta Ukon ,  Shuhei Yoshida ,  Koyo Nitta

IPC: H04L47/80 ,  H04L47/6275

Abstract: An access control unit includes packet buffers provided for each of users, a packet identification unit that stores received packets in a corresponding packet buffer, a scheduling unit that decides a packet buffer to be the object of transfer, a transfer control unit that, in a case that updating of reference data can be performed at an application processing circuit, and also the packet buffer decided by the scheduling unit is different from the current packet buffer that is the object of transfer, updates to reference data corresponding to the packet buffer decided by the scheduling unit, and a buffer selection unit that connects the packet buffers decided to be the object of transfer to the packet transfer unit when updating of reference data is completed.

公开(公告)号：US20210409344A1

公开(公告)日：2021-12-30

申请号：US17290342

申请日：2019-10-23

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Yuta Ukon ,  Shuhei Yoshida ,  Koyo Nitta

IPC: H04L12/927 ,  H04L12/865

Abstract: An access control unit includes packet buffers provided for each of users, a packet identification unit that stores received packets in a corresponding packet buffer, a scheduling unit that decides a packet buffer to be the object of transfer, a transfer control unit that, in a case that updating of reference data can be performed at an application processing circuit, and also the packet buffer decided by the scheduling unit is different from the current packet buffer that is the object of transfer, updates to reference data corresponding to the packet buffer decided by the scheduling unit, and a buffer selection unit that connects the packet buffers decided to be the object of transfer to the packet transfer unit when updating of reference data is completed.

公开(公告)号：US20210051117A1

公开(公告)日：2021-02-18

申请号：US16963544

申请日：2019-02-08

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Syuhei Yoshida ,  Yuta Ukon ,  Koji Yamazaki ,  Koyo Nitta

IPC: H04L12/861 ,  H04L12/851 ,  H04L12/883

Abstract: A flow control device includes an analysis unit identifying a flow of a received packet, a plurality of queues temporarily storing packets sorted according to each flow, an allocation information storage unit storing allocation information regarding a queue allocated for each flow, a sorting unit deciding a queue to be a storage destination of the received packet and sorts the packet based on a result identified by the analysis unit and the allocation information, a saved packet holding unit saving a packet belonging to a flow determined to have no allocation information regarding the queue to be allocated by the sorting unit, and a transmission unit transmitting the packet temporarily stored in the plurality of queues and the packet saved in the saved packet holding unit to a processing unit that processes a packet.

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.

公开(公告)号：US20240430131A1

公开(公告)日：2024-12-26

申请号：US18703996

申请日：2022-11-08

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Naoki Miura ,  Takeshi Sakamoto ,  Yuki Arikawa ,  Tsuyoshi Ito ,  Kenji Tanaka ,  Masaru Katayama ,  Yuta Ukon

IPC: H04L12/413 ,  H04L45/021 ,  H04L45/302 ,  H04L49/9057

Abstract: A data transfer device transfers a received packet. If the transfer destination of the received packet is a data processing device under control, the data transfer device (confirms the state of a shared bus, and if the shared bus is usable, transfers the packet to the data processing device of the transfer destination via the shared bus, gives the use right of the shared bus to one of the data processing devices in response to communication requirements from the data processing devices, and receives, via the shared bus, a packet from the data processing device given the use right.