公开(公告)号：US12126509B2

公开(公告)日：2024-10-22

申请号：US18256411

申请日：2020-12-09

申请人： Nippon Telegraph and Telephone Corporation

发明人： Hiroyuki Uzawa ,  Saki Hatta ,  Shuhei Yoshida ,  Koyo Nitta

IPC分类号： H04L43/106 ,  H04L43/067 ,  H04L69/28

CPC分类号： H04L43/067 ,  H04L43/106 ,  H04L69/28

摘要： An embodiment is a packet capture device including a first local timer synchronized with an external global timer, a second local timer, a time stamp assign unit for assigning a time stamp to a inputted packet signal based on the second local timer, a filter unit for selecting the packet signal to which the time stamp is assigned, a capture file generation unit for receiving the selected packet signal, and a storage unit for storing a capture file generated in the capture file generation unit, wherein the capture file generation unit calculate a difference between a timer value of the first local timer and a timer value of the second local timer to correct the time stamp value on the basis of the difference.

公开(公告)号：US11924111B2

公开(公告)日：2024-03-05

申请号：US17595918

申请日：2019-06-03

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Naotaka Shibata ,  Hiroyuki Uzawa ,  Noriyuki Ota ,  Jun Terada

IPC分类号： H04L47/22 ,  H04L43/0888 ,  H04L49/90 ,  H04Q11/00

CPC分类号： H04L47/225 ,  H04L43/0888 ,  H04L49/90 ,  H04Q2011/0083

摘要： A buffer unit including a plurality of buffers, a sorting unit configured to sort an input signal to any of the plurality of buffers based on header information, a rate calculation unit configured to calculate a rate at which the input signal is read from each of the plurality of buffers based on burst information of the input signal, an adjustment unit configured to adjust a rate at which the input signal is read from each of the plurality of buffers based on the rate calculated by the rate calculation unit, and a transfer unit configured to transfer the signal read from each of the plurality of buffers are provided.

公开(公告)号：US11825395B2

公开(公告)日：2023-11-21

申请号：US17298294

申请日：2019-11-28

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Naotaka Shibata ,  Hiroyuki Uzawa ,  Yoichi Fukada ,  Jun Terada

IPC分类号： H04W40/02 ,  H04L45/02 ,  H04L45/24

CPC分类号： H04W40/02 ,  H04L45/02 ,  H04L45/24

摘要： A path control method of controlling a communication path in a network including a plurality of wireless devices communicating with a terminal in a wireless manner and a plurality of wireless control devices communicating with any one of the plurality of wireless devices through a plurality of signal transfer devices includes searching for available communication paths and listing the available communication paths for individual combinations of a wireless device of the plurality of wireless devices and a wireless control device of the plurality of wireless control devices, and selecting a combination of communication paths in which a maximum value of the number of communications passing through the same output port of a signal transfer device of the plurality of signal transfer devices is minimized from among the listed available communication paths.

公开(公告)号：US11706664B2

公开(公告)日：2023-07-18

申请号：US17298336

申请日：2019-11-28

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Naotaka Shibata ,  Hiroyuki Uzawa ,  Yoichi Fukada ,  Jun Terada

IPC分类号： H04W28/08 ,  H04W40/02 ,  H04W72/566

CPC分类号： H04W28/0967 ,  H04W40/02 ,  H04W72/569

摘要： Provided is a path control method of controlling a path of communication in a network including a high priority device dealing with high priority traffic, a high priority control device communicating with the high priority device through a plurality of signal transfer devices transferring signals by periodically repeating a high priority signal transmissible period in which high priority traffic is transmissible and a low priority signal transmissible period in which low priority traffic is transmissible, a low priority device dealing with the low priority traffic, and a low priority control device communicating with the low priority device through the plurality of signal transfer devices, the path control method including calculating a low priority signal transmissible period in each of paths between the low priority device and the low priority control device, and performing setting for switching the path between the low priority device and the low priority control device so that the low priority traffic is transmitted in any one of the calculated low priority signal transmissible periods.

公开(公告)号：US11329749B2

公开(公告)日：2022-05-10

申请号：US16483715

申请日：2018-02-06

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Hiroyuki Uzawa ,  Tatsuya Shimada ,  Daisuke Hisano ,  Hiroko Nomura

IPC分类号： H04J3/16 ,  H04W72/04 ,  H04W72/12

摘要： A bandwidth allocation device is included in a communication system having a terminal station device and a terminal device and relaying upstream data, which is received from a communication terminal by a lower device connected to the terminal device, to an upper device connected to the terminal station device. The bandwidth allocation device includes a transmission-permitted period start position determining unit configured to estimate a start position of an arrival period in which the upstream data arrives at the terminal device from the lower device; a transmission-permitted period length determining unit configured to estimate a length of the arrival period based on an amount of upstream data to be transmitted from the lower device to the terminal device; and a bandwidth allocation unit configured to allocate a bandwidth to the terminal device based on the estimated start position and the estimated length of the arrival period.

公开(公告)号：US10602407B2

公开(公告)日：2020-03-24

申请号：US15739677

申请日：2016-06-22

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Hiroyuki Uzawa ,  Yuki Arikawa ,  Kenji Kawai ,  Satoshi Shigematsu

IPC分类号： H04W28/14 ,  H04L12/44 ,  H04W88/08 ,  H04J14/02 ,  H04W72/04 ,  H04J14/08 ,  H04Q11/00 ,  H04W72/12

摘要： A CU (Central Unit) executes scheduling for allocating radio resources of RRUs (Remote Radio Units) to radio transmission of downlink data while broadcasting, to DMs (Data Managers) via MFH, downlink data from MBH. Each DM selects, based on an allocation result obtained by scheduling, the downlink data of an RRU (Remote Radio Unit) corresponding to the self DM from the accumulated downlink data from the CU, and transfers the selected downlink data to the corresponding RRU while discarding the downlink data of other RRUs. Based on the allocation result, each RRU performs radio transmission of the downlink data from the DM to a corresponding UE (User Equipment) using the designated radio resource. This makes it possible to efficiently transfer the downlink data from the CU to each RRU via the MFH constructed by a TDM system represented by TDM-PON.

公开(公告)号：US20240283721A1

公开(公告)日：2024-08-22

申请号：US18570022

申请日：2021-06-23

申请人： Nippon Telegraph and Telephone Corporation

发明人： Shuhei Yoshida ,  Hiroyuki Uzawa ,  Namiko Ikeda ,  Saki Hatta ,  Yusuke Sekihara ,  Shoko Oteru

IPC分类号： H04L43/0823 ,  H04L41/06

CPC分类号： H04L43/0823 ,  H04L41/06

摘要： An embodiment packet capture method includes steps of imparting a flag for each data of a received and divided packet, a step of writing the data in a ring buffer, steps of issuing a failure detection trigger when a cumulative value of the number of bytes of the packet within a period of failure detection exceeds a failure detection threshold value, steps of stopping writing to the ring buffer when writing to the ring buffer reaches or exceeds a writing stop address determined on the basis of the failure detection trigger, a step of reading data sequentially from the writing stop address, and steps of outputting a packet capture depending on the result determined based on the flags of the read data.

公开(公告)号：US20240235974A1

公开(公告)日：2024-07-11

申请号：US18573730

申请日：2021-06-30

申请人： Nippon Telegraph and Telephone Corporation

发明人： Hiroyuki Uzawa ,  Yusuke Sekihara ,  Saki Hatta ,  Shuhei Yoshida ,  Namiko Ikeda

IPC分类号： H04L43/0876 ,  H04L43/022 ,  H04L43/026

CPC分类号： H04L43/0876 ,  H04L43/026 ,  H04L43/022

摘要： A traffic monitoring device includes an identification unit that identifies a flow of a packet received from a monitoring target network into a flow of a first flow group and a second flow group other than the first flow group on the basis of a rule table in which a predetermined rule is registered, a traffic aggregation unit that aggregates a traffic amount of the first flow group for each flow, an occurrence probability calculation unit that calculates an occurrence probability of each flow on the basis of a result of sampling at least some of the flow of the packet received, and a traffic estimation unit that estimates a traffic amount of each flow of the second flow group by multiplying the occurrence probability of each flow by the total value of the traffic amount of the second flow group.

公开(公告)号：US20230421463A1

公开(公告)日：2023-12-28

申请号：US18254101

申请日：2020-12-09

申请人： Nippon Telegraph and Telephone Corporation

发明人： Saki Hatta ,  Hiroyuki Uzawa ,  Shuhei Yoshida ,  Koyo Nitta

IPC分类号： H04L43/028 ,  H04L43/026 ,  H04L47/32

CPC分类号： H04L43/028 ,  H04L43/026 ,  H04L47/32

摘要： A packet capture system for capturing packets flowing in a capture target network, and a plurality of stages of packet distribution devices for capturing packet of a specific flow are cascade-connected, packet distribution devices identify a capture target flow by analyzing inputted packets, packet distribution devices other than a last-stage packet distribution device are configured to distribute packets to capture packets of a flow to be captured and output packets of a flow not to be captured to a next-stage packet distribution device, and the last-stage packet distribution device is configured to filter the packets of the flow to be captured and to discard the packets of the flow not to be captured.

公开(公告)号：US11849432B2

公开(公告)日：2023-12-19

申请号：US17269211

申请日：2019-08-16

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Hiroyuki Uzawa ,  Hirotaka Ujikawa ,  Hirotaka Nakamura

IPC分类号： H04W72/04 ,  H04W72/12 ,  H04W72/044 ,  H04W28/20

CPC分类号： H04W72/044 ,  H04W28/20 ,  H04W72/12

摘要： A bandwidth allocation apparatus includes an acquisition unit acquiring scheduling information related to transmission of uplink data from a first subscriber line termination apparatus corresponding to a subscriber line termination apparatus needing to transfer uplink data with low latency, a requested amount reception unit receiving, from second subscriber line termination apparatus corresponding to a subscriber line termination apparatus not needing to transfer uplink data with low latency, information representing a requested amount related to transmission of uplink data from the second subscriber line termination apparatus, in a requested amount reception cycle corresponding to a cycle equal to or longer than a predetermined maximum round-trip time, and an allocation unit allocating, in an allocation amount determination cycle shorter than the requested amount reception cycle, a bandwidth to the uplink data from the first subscriber line termination apparatus on a basis of the scheduling information, and allocating, in the allocation amount determination cycle, a bandwidth to the uplink data from the second subscriber line termination apparatus on a basis of the information representing the requested amount.