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公开(公告)号：US20250142363A1
公开(公告)日：2025-05-01
申请号：US18865963
申请日：2022-05-17
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Karin UMEDA , Yoshihito SAKAI , Hiroko NOMURA , Hirotaka UJIKAWA , Tatsuya SHIMADA
Abstract: Provided is a communication system including: one or more wireless stations that perform wireless communication with one or more terminals; a plurality of distributed stations connected, directly or via another device, to the one or more wireless stations; a cooperation information collection unit that acquires, at a predetermined cycle, cooperation information indicating a state of communication between the plurality of distributed stations and the one or more terminals; an optical path switching control unit that controls switching of an optical path between the one or more wireless stations and the plurality of distributed stations when it is determined, on the basis of the cooperation information, that the switching of the optical path between the one or more wireless stations and the plurality of distributed stations is required; and a sleep control unit that causes each of the distributed stations that can sleep to transition to a sleep state after the switching of the optical path is performed.
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2.发明公开公开(公告)号：US20240348558A1
公开(公告)日：2024-10-17
申请号：US18701040
申请日：2021-10-21
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Hiroko NOMURA , Yoshihito SAKAI
IPC: H04L47/625 , H04L47/12
CPC classification number: H04L47/626 , H04L47/12
Abstract: A signal transfer system including a first signal transfer control device associated with a first network, and a second signal transfer control device associated with a second network connected to the first network via an intermediate node, in which the first signal transfer control device includes a first communication unit that transmits first schedule information at a predetermined notification cycle, and a second communication unit that transmits a trigger signal on the basis of a change amount of traffic of the first network, and the second signal transfer control device includes an acquisition unit that acquires the first schedule information at the predetermined notification cycle, a third communication unit that acquires the trigger signal, a change amount determination unit that, when the trigger signal is acquired, determines whether or not the change amount of traffic of the first network is equal to or greater than a threshold on the basis of the first schedule information, an information update unit that updates second schedule information when it is determined that the change amount is equal to or greater than the threshold, and a cycle instruction unit that instructs a predetermined notification cycle when it is determined that the change amount is equal to or greater than the threshold.
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3.发明申请公开(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
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.
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4.发明申请公开(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.
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公开(公告)号：US20240323575A1
公开(公告)日：2024-09-26
申请号：US18694813
申请日：2021-10-04
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Karin UMEDA , Kota ASAKA , Hiroko NOMURA , Hiroshi O , Yoshihito SAKAI , Hirotaka UJIKAWA , Kenji MIYAMOTO , Yuka OKAMOTO , Tatsuya SHIMADA
CPC classification number: H04Q11/0062 , H04B10/27 , H04Q2011/0086
Abstract: A control device including a collection unit that acquires, at a predetermined cycle, cooperation information, which is information indicating a communication state between a communication system that includes a wireless station including an antenna and an allocation device that allocates a wavelength, and a terminal to be communicated, an analysis unit that analyzes the communication state in the communication system on the basis of the cooperation information, and an allocation control unit that controls execution of wavelength allocation by the allocation device on the basis of an analysis result of the analysis unit.
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Patent Agency Ranking
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
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.
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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.
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公开(公告)号：US20200028605A1
公开(公告)日：2020-01-23
申请号：US16483715
申请日：2018-02-06
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Hiroyuki UZAWA , Tatsuya SHIMADA , Daisuke HISANO , Hiroko NOMURA
Abstract: 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.
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公开(公告)号：US20240406952A1
公开(公告)日：2024-12-05
申请号：US18700904
申请日：2021-10-22
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Hiroko NOMURA , Kenji MIYAMOTO , Kota ASAKA
IPC: H04W72/1263 , H04W72/566
Abstract: A control device includes: a scheme determination unit configured to determine whether a packet to which an identifier of a priority is assigned is transmitted in conformity with a grant-free scheme; a time estimation unit configured to estimate a time in which a traffic volume of the packet is equal to or more than a threshold; and a transfer control unit configured to generate a control signal of a signal transfer device so that the signal transfer device transfers a packet that has arrived at the signal transfer device in the estimated time in accordance with the identifier of the priority. The scheme determination unit determines whether the repeated transmission of the packet is performed. The time estimation unit estimates a time in which the plurality of packets arrive at the signal transfer device a predetermined number of times at predetermined time intervals when it is determined that the repeated transmission of the packets is performed.
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公开(公告)号：US20240405909A1
公开(公告)日：2024-12-05
申请号：US18694838
申请日：2021-10-04
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Hiroko NOMURA , Hirotaka UJIKAWA , Kenji MIYAMOTO , Kota ASAKA , Yoshihito SAKAI , Tatsuya SHIMADA
IPC: H04J14/02
Abstract: A control device includes an acquisition unit that acquires information from a distributed station that notifies the information related to one or more events occurred within a predetermined time period at a predetermined notification frequency, an information analysis unit that executes analysis processing on the information, a frequency derivation unit that derives an occurrence frequency of the information, a load derivation unit that derives a load of analysis processing of the information, and a frequency control unit that controls the predetermined notification frequency with a frequency lower than the occurrence frequency as an upper limit on the basis of at least one of an analysis result of the information, an occurrence frequency of the information, and a load of analysis processing of the information.
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