公开(公告)号：US20240372812A1

公开(公告)日：2024-11-07

申请号：US18576112

申请日：2021-07-19

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hiroko NOMURA ,  Keita TAKAHASHI ,  Tatsuya SHIMADA

IPC: H04L47/24 ,  H04L47/28

Abstract: A signal transfer control device acquires first schedule information in which a signal transfer device that finally transfers a signal to an intermediate node in a first network transfers a signal, and acquires, for each signal transferred from the first network, processing time information required for the intermediate node to transfer the signal to a second network. Further, the signal transfer control device calculates a correlation between a traffic volume in the intermediate node and a time required for signal transfer processing on the basis of the first schedule information and a plurality of pieces of the acquired processing time information, predicts a time required for signal transfer according to the traffic volume in the intermediate node on the basis of the correlation and the processing time information acquired for each signal, and determines second schedule information.

公开(公告)号：US20230319595A1

公开(公告)日：2023-10-05

申请号：US18022637

申请日：2020-08-27

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hirofumi YAMAMOTO ,  Keita TAKAHASHI ,  Hiroko NOMURA

IPC: H04W24/02

CPC classification number: H04W24/02 ,  H04W92/04

Abstract: A slave station system 2 includes: a first shared slave station device 10 connected to a plurality of master station devices including at least a first master station device 3a and a second master station device 3b different from the first master station device 3a, and a second shared slave station device 20 connected to the first shared slave station device 10. The first shared slave station device 10 is equipped with a first individual function unit 11a corresponding to the first master station device 3a and a second individual function unit 11b corresponding to the second master station device 3b. The second shared slave station device 20 is equipped with a common function unit 21 connected to the first individual function unit 11a and the second individual function unit 11b and functioning regardless of the types of the plurality of master station devices.

公开(公告)号：US20230156382A1

公开(公告)日：2023-05-18

申请号：US17911758

申请日：2020-03-19

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tomoya HATANO ,  Keita TAKAHASHI

IPC: H04Q11/00

CPC classification number: H04Q11/0067 ,  H04Q2011/0096

Abstract: One aspect of the present invention is a communication system for a passive optical network that includes: an OLT (optical line terminal); a first splitter configured to output an optical signal that is output from the OLT, to optical communication channels from a first port and a second port; a plurality of second splitters that are connected between the first port and second port of the first splitter using optical communication channels; and ONUs (optical network units) that are connected to the respective second splitters using optical communication channels.

公开(公告)号：US20230084976A1

公开(公告)日：2023-03-16

申请号：US17802126

申请日：2020-03-06

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tomoya HATANO ,  Keita TAKAHASHI ,  Naotaka SHIBATA ,  Hiroko NOMURA

IPC: H04B10/275 ,  H04B10/03

Abstract: 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

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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

IPC: H04W28/02

Abstract: 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：US20240031018A1

公开(公告)日：2024-01-25

申请号：US18028807

申请日：2020-10-07

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hiroko NOMURA ,  Keita TAKAHASHI

IPC: H04B10/032

CPC classification number: H04B10/032

Abstract: Provided is a multiplex transmission system capable of realizing a redundant configuration for coping with a failure while reducing useless resources. A multiplex transmission system includes: a resource pool 130 which is provided in a first multiplex transmission apparatus 100 and which has a resource that enables a function to be rewritten; and a management control unit 140 which controls the resource pool 130. The first multiplex transmission apparatus 100 includes: at least one client port to which a client apparatus can be connected; a transmission/reception unit corresponding to the client port; a standby system client port; and a standby system transmission/reception unit corresponding to the standby system client port. During normal time, an electrical processing function associated with each of the transmission/reception units is constructed in the resource pool 130. When a failure occurs in the transmission/reception unit, the management control unit 140 controls the resource pool 130 so as to release a resource in which is constructed an electrical processing function associated with the transmission/reception unit and to construct an electrical processing function associated with the standby system transmission/reception unit in the resource.

公开(公告)号：US20230261779A1

公开(公告)日：2023-08-17

申请号：US18012441

申请日：2020-06-29

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Keita TAKAHASHI ,  Hiroko NOMURA ,  Naotaka SHIBATA ,  Tomoya HATANO

IPC: H04J14/02 ,  H04Q11/04

CPC classification number: H04J14/0289 ,  H04Q11/04 ,  H04Q2213/13292

Abstract: Provided is a multiplex transmission system capable of preventing occurrence of a mistake on connection of a client device to a multiplex transmission device. The multiplex transmission system includes: a detection means configured to detect new client connection that is new connection of a client device to a client port of each of a first multiplex transmission device 100 and a second multiplex transmission device 200; and a switch control unit 340 configured to control a switch unit 330 to connect a client port where new client connection is detected at a first time point in the first multiplex transmission device 100 with a client port where new client connection is detected at a second time point in the second multiplex transmission device, when a time interval between the first time point at which new client connection is detected in the first multiplex transmission device 100 and the second time point at which new client connection is detected in the second multiplex transmission device 200 is within a preset reference time, in a case where new client connection is detected in both the first multiplex transmission device 100 and the second multiplex transmission device 200.

公开(公告)号：US20220007151A1

公开(公告)日：2022-01-06

申请号：US17291259

申请日：2019-10-25

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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

IPC: H04W4/06 ,  H04B7/155

Abstract: 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：US20230135477A1

公开(公告)日：2023-05-04

申请号：US17910291

申请日：2020-03-09

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Naotaka SHIBATA ,  Hiroko NOMURA ,  Keita TAKAHASHI ,  Tomoya HATANO

IPC: H04W72/23 ,  H04W88/08

Abstract: In a signal transfer system including a signal transfer management apparatus and a plurality of signal transfer apparatuses connected in multiple stages and forming a network between a distribution station apparatus and a central station apparatus, a signal transfer apparatus on an upper side among the plurality of signal transfer apparatuses transmits a timing adjustment request to at least one of a plurality of signal transfer apparatuses on a lower side when discard of a signal received from the plurality of signal transfer apparatuses on the lower side has been detected or when an amount of traffic of a plurality of signals received from the plurality of signal transfer apparatuses on the lower side exceeds a predetermined threshold value, and the signal transfer apparatus on the lower side that has received the timing adjustment request from the signal transfer apparatus on the upper side adjusts opening and closing timings of a gate based on the timing adjustment request. This can prevent the occurrence of a microburst.

公开(公告)号：US20230120429A1

公开(公告)日：2023-04-20

申请号：US17910277

申请日：2020-03-09

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hiroko NOMURA ,  Naotaka SHIBATA ,  Keita TAKAHASHI ,  Tomoya HATANO

IPC: H04L47/62 ,  H04L47/6275

Abstract: In a signal transfer system including a signal transfer management apparatus and a plurality of signal transfer apparatuses connected in multiple stages and forming a network between a distribution station apparatus and a central station apparatus, a signal transfer apparatus on an upper side among the plurality of signal transfer apparatuses transmits a timing adjustment request to at least one of a plurality of signal transfer apparatuses on a lower side among the plurality of signal transfer apparatuses upon determining that there is a possibility that a microburst occurs according to mobile scheduling information received from the plurality of signal transfer apparatuses on the lower side, and the signal transfer apparatus on the lower side that has received the timing adjustment request from the signal transfer apparatus on the upper side adjusts opening and closing timings of a gate based on the timing adjustment request. This can prevent the occurrence of a microburst.