公开(公告)号：US20230120832A1

公开(公告)日：2023-04-20

申请号：US17907426

申请日：2020-03-30

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Naotaka SHIBATA ,  Hirotaka UJIKAWA

IPC分类号： H04W24/08 ,  H04W76/10 ,  H04W28/02

摘要： A monitoring device that monitors a network to which a plurality of terminal devices establishing a connection based on TCP are connected, includes: a request detection unit that detects a connection establishment request that a terminal device becoming a client sends to another terminal device becoming a server; an available bandwidth calculation unit that calculates an available bandwidth by subtracting a current amount of traffic from an allowable communication capacity, for each communication path identified by the connection establishment request detected by the request detection unit; and a setting command unit that, when the available bandwidth calculated by the available bandwidth calculation unit is larger than a preset value, transmits a command that sets the client to enlarge a congestion window to a predetermined value, regardless of presence or absence of an acknowledgement sent by the server.

公开(公告)号：US20220030500A1

公开(公告)日：2022-01-27

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 ,  H04L12/707 ,  H04L12/751

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：US20220007151A1

公开(公告)日：2022-01-06

申请号：US17291259

申请日：2019-10-25

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Naotaka SHIBATA ,  Hirofumi YAMAMOTO ,  Keita TAKAHASHI ,  Noriyuki OTA ,  Jun TERADA

IPC分类号： H04W4/06 ,  H04B7/155

摘要： A relay device including: an information storage unit that stores conversion-target header information; a downlink signal dividing unit that divides a downlink signal received from the radio control device into a header and a payload; a signal replicating unit that makes the same number of copies of the payload of the downlink signal as the number of the plurality of destination radio devices; a downlink signal header information conversion unit that performs conversion on the header of the downlink signal for each destination radio device based on the header information stored in the information storage unit; and a signal addition assignment unit that adds the header converted by the downlink signal header information conversion unit to each of the payloads of the downlink signal replicated by the signal replicating unit, and transfers the payloads to the radio devices respectively corresponding thereto.

公开(公告)号：US20230084976A1

公开(公告)日：2023-03-16

申请号：US17802126

申请日：2020-03-06

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Tomoya HATANO ,  Keita TAKAHASHI ,  Naotaka SHIBATA ,  Hiroko NOMURA

IPC分类号： H04B10/275 ,  H04B10/03

摘要： A communication system of a passive optical communication network includes an optical line terminal (OLT) system including a first OLT, a second OLT, and an OLT control device that controls the first OLT and the second OLT, a plurality of splitters that connects between the first OLT and the second OLT with an optical communication path, and an optical network unit (ONU) that is connected to each of the plurality of splitters with an optical communication path.

公开(公告)号：US20220201536A1

公开(公告)日：2022-06-23

申请号：US17603464

申请日：2020-04-02

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Tatsuya FUKUI ,  Naotaka SHIBATA ,  Keita TAKAHASHI ,  Hideaki KIMURA ,  Noriyuki OTA ,  Hirofumi YAMAMOTO ,  Jun TERADA

IPC分类号： H04W28/02

摘要： An object is to provide a communication system, a communication apparatus, and a terminal apparatus capable of integrating communication paths of both of mobile access and fixed access while addition of a new function to a mobile network is reduced.
In a communication system 100 according to the present invention, a communication path of one mobile bearer between a base station master station apparatus 300 and a user gateway 600 includes a split bearer configuration including a mobile access communication path being connected from the base station master station apparatus 300 to the user gateway 600 via a mobile access slave station apparatus 400 and a non-mobile access communication path being connected from the base station master station apparatus 300 to the user gateway 600 via a non-mobile access slave station apparatus 500.

公开(公告)号：US20220116825A1

公开(公告)日：2022-04-14

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 ,  H04W72/12

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：US20150373640A1

公开(公告)日：2015-12-24

申请号：US14654783

申请日：2013-12-17

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Noriko IIYAMA ,  Jun-ichi KANI ,  Naotaka SHIBATA

IPC分类号： H04W52/02 ,  H04B10/2575 ,  H04W72/12 ,  H04Q11/00

CPC分类号： H04W52/0203 ,  H04B10/25753 ,  H04B10/272 ,  H04Q11/0067 ,  H04Q2011/0064 ,  H04Q2011/0086 ,  H04W72/1289 ,  H04W88/085 ,  Y02D70/1262 ,  Y02D70/146 ,  Y02D70/24 ,  Y02D70/46

摘要： A method of operating an optical-wireless access system, wherein an ONU obtains information on dynamic scheduling control of the optical-wireless access system, information on discontinuous reception control of the optical-wireless access system, or both of them, and such information is used in the ONU or transferred to an OLT and used as parameters of scheduling in the PON and sleep control.

摘要翻译： 一种操作光无线接入系统的方法，其中ONU获取关于光无线接入系统的动态调度控制的信息，关于光无线接入系统的不连续接收控制的信息，或者它们两者，这些信息是 在ONU中使用或传输到OLT并用作PON中的调度参数和睡眠控制。

公开(公告)号：US20220294742A1

公开(公告)日：2022-09-15

申请号：US17634197

申请日：2019-08-19

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Naotaka SHIBATA ,  Hiroyuki UZAWA ,  Jun TERADA

IPC分类号： H04L47/283 ,  H04L47/24 ,  H04L47/62 ,  H04L49/20 ,  H04L45/24

摘要： A path control device controls a plurality of paths for transmitting signals through a network including a plurality of signal transfer devices that transfer signals while switching a first transmission period during which high-priority traffic can be transmitted and a second transmission period during which low-priority traffic can be transmitted. The path control device includes: a calculation unit that calculates a plurality of paths through which signals are transferred, based on network configuration information indicating a configuration of the network; an estimation unit that estimates paths for low-priority traffic so as to increase the number of low-priority traffic flows to be transferred during a predetermined period through the plurality of paths calculated by the calculation unit, in a case in which the plurality of signal transfer devices detect an end of high priority traffic in the first transmission period, in accordance with statistical values in the second transmission period based on a transmission schedule made to change the first transmission period after the end of high-priority traffic to the second transmission period; and a determination unit that determines, for each of the plurality of signal transfer devices, output destination setting information such that the paths estimated by the estimation unit are set to an output destination of low-priority traffic.

公开(公告)号：US20220263762A1

公开(公告)日：2022-08-18

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 ,  H04L49/90 ,  H04L43/0888

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：US20220200911A1

公开(公告)日：2022-06-23

申请号：US17595063

申请日：2020-04-27

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Hiroyuki UZAWA ,  Naotaka SHIBATA ,  Yoichi FUKADA ,  Jun TERADA

IPC分类号： H04L47/22 ,  H04L49/351 ,  H04L47/32

摘要： A communication control system includes a plurality of layer 2 switches (SWs); and a communication control device that controls communication of the SWs. Each SW includes one or more queues that each have a variable queue length for accumulating input frames, and a transmission unit that has a shaping function of transmitting the frames accumulated in the queues to a desired destination at a desired rate. The communication control device includes a correction processing unit that acquires an amount of discarded data generated in each queue of the SW, and multiplies the acquired amount of discarded data by a correction coefficient weighted by the cumulative number of times of discarding occurrences for which the amount of discarded data is not 0 to obtain a corrected amount of discarded data; and an adjustment processing unit that determines adjustment values for the queue length of each queue and shaping rate of the SW based on the corrected amount of discarded data, and notifies each SW of the adjustment values.