公开(公告)号：US20240414646A1

公开(公告)日：2024-12-12

申请号：US18699762

申请日：2021-10-11

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hirotaka UJIKAWA ,  Tatsuya SHIMADA ,  Yoshihito SAKAI ,  Kenji MIYAMOTO ,  Yuka OKAMOTO

IPC: H04W52/02

Abstract: A first transmission apparatus receives a data signal transmitted by a communication apparatus from a lower transmission apparatus sets the received data signal in a data unit, and transmits the data unit. A second transmission apparatus receives the data unit transmitted by the first transmission apparatus. An electric power controller calculates an arrival start timing that is a timing at which the data unit including a data signal transmitted from a communication apparatus starts to arrive at the second transmission apparatus on a basis of a code rate and a size of a data transmission block used when the communication apparatus transmits the data signal, and performs control such that a sleep state of a signal processor that performs processing on the data unit in the second transmission apparatus is ended before the arrival start timing.

公开(公告)号：US20250097161A1

公开(公告)日：2025-03-20

申请号：US18727916

申请日：2022-02-25

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Kenji MIYAMOTO ,  Yoshihito SAKAI ,  Tatsuya SHIMADA

IPC: H04L47/283 ,  H04W28/06

Abstract: According to an aspect of the present invention, there is provided a signal transfer system that transfers a signal from one communication device to another communication device, the signal transfer system including an information acquisition unit that acquires network transfer information that is information regarding a traffic flow for each traffic flow from the one communication device to the other communication device; and a communication control unit that executes an adjustment process that is a process of reducing a waiting time for a frame on the basis of the network transfer information acquired by the information acquisition unit.

公开(公告)号：US20250081270A1

公开(公告)日：2025-03-06

申请号：US18697561

申请日：2021-10-04

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yuka OKAMOTO ,  Tatsuya SHIMADA ,  Yoshihito SAKAI ,  Hirotaka UJIKAWA ,  Kenji MIYAMOTO ,  Hiroko NOMURA

IPC: H04W76/20 ,  H04W28/02 ,  H04W28/08 ,  H04W72/52

Abstract: A switching control apparatus calculates a traffic amount in a predetermined period of each first transmission apparatus that is a transmission apparatus of a predetermined layer on the basis of allocation of radio resources to a terminal that wirelessly transmits a signal to a lowermost transmission apparatus among a plurality of transfer apparatuses that constitute a communication network hierarchized into a plurality of layers and transfer a received signal to a layer next above. The switching control apparatus calculates a processing capability predicted to be required for each second transmission apparatus which is a transmission apparatus of a layer next above the first transmission apparatus on the basis of the traffic amount of the first transmission apparatus. The switching control apparatus instructs a transfer apparatus for transferring a signal transmitted from the first transmission apparatus to the second transmission apparatus to switch a connection destination of the first transmission apparatus under the control of the second transmission apparatus in which congestion is determined to occur on the basis of the processing capability.

公开(公告)号：US20250007844A1

公开(公告)日：2025-01-02

申请号：US18691690

申请日：2021-10-12

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Kenji MIYAMOTO ,  Yoshihito SAKAI ,  Tatsuya SHIMADA

IPC: H04L47/22 ,  H04W28/02 ,  H04W28/22

Abstract: Provided is a communication system comprising: at least one base station accommodating a wireless terminal; at least one transfer device which transfers, to a higher level, an uplink communication of the wireless terminal received via the base station; and a transfer device controller which controls the at least one transfer device, and the communication system further includes: an information acquisition unit for acquiring information regarding a wireless communication for each quality-of-service class between the base station and the wireless terminal; a rate determination unit for determining, for each of the quality-of-service classes, a shaping rate for traffic shaping such that a packet loss caused by congestion does not occur, on the basis of the information regarding the wireless communication for each quality-of-service class; and a communication control unit for executing, for each quality-of-service class, the traffic shaping at the higher level to the base station on the basis of the shaping rate determined by the rate determination unit.

公开(公告)号：US20220263594A1

公开(公告)日：2022-08-18

申请号：US17725148

申请日：2022-04-20

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hiroyuki UZAWA ,  Tatsuya SHIMADA ,  Daisuke HISANO ,  Hiroko NOMURA

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

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.

公开(公告)号：US20210288723A1

公开(公告)日：2021-09-16

申请号：US16330605

申请日：2017-09-08

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Daisuke HISANO ,  Tatsuya SHIMADA ,  Hiroshi OU ,  Hiroko NOMURA

IPC: H04B10/69 ,  H04L27/26 ,  H04L5/00 ,  H04B10/079

Abstract: An optical transmission system includes ground stations; optical-terminating devices; a traffic-monitoring unit that detects a traffic amount of the uplink signal transmitted in a time-division multiplexing manner for each of the optical-terminating devices; and a bandwidth allocation calculation unit that estimates one optical-terminating device of the optical-terminating devices connected to one ground station of the ground stations having a cell where the moving object is positioned on the basis of the traffic amount, and calculates a first allocation amount of a bandwidth allocated to the uplink signal of the one optical-terminating device connected to the one ground station having the cell where the moving object is positioned and a second allocation amount of a bandwidth allocated to the uplink signal of another optical-terminating device of the optical-terminating devices connected to another ground station of the ground stations having a cell adjacent to the cell where the moving object is positioned.

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

IPC: H04W24/02 ,  H04W36/22 ,  H04W52/02

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.

公开(公告)号：US20240323800A1

公开(公告)日：2024-09-26

申请号：US18578863

申请日：2021-08-06

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Kenji MIYAMOTO ,  Yoshihito SAKAI ,  Tatsuya SHIMADA

IPC: H04W40/12

CPC classification number: H04W40/12

Abstract: According to an aspect of the present invention, there is a wireless communication system including: a plurality of end wireless devices that include an antenna and transmit and receive signals to and from a wireless terminal which is a communication target; a plurality of transfer devices that transfer signals which are transmitted and received by the wireless terminal which is a communication target and the end wireless device; and a transfer management device that, in a case where communication status information indicating a status of communication between the wireless terminal and the end wireless devices is received, executes a transfer route control process of controlling paths between the plurality of transfer devices on the basis of the received communication status information, wherein the end wireless devices execute a switching process of controlling operations of the end wireless devices relating to communication between the end wireless devices and the wireless terminal on the basis of the communication status information, and the transfer management device receives the communication status information before the switching process is completed.

公开(公告)号：US20190182836A1

公开(公告)日：2019-06-13

申请号：US16310050

申请日：2017-06-19

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tatsuya SHIMADA ,  Takayuki KOBAYASHI ,  Hiroshi OU ,  Daisuke HISANO

IPC: H04W72/04

Abstract: An optical transmission device includes a bandwidth allocator that periodically reads bandwidth request information indicating a bandwidth required for a termination device to transmit an uplink signal from a storage and allocates a bandwidth to the termination device on the basis of the read bandwidth request information, and a timing adjuster that adjusts a period at intervals of which the bandwidth allocator reads the bandwidth request information from the storage on the basis of the timing at which resource information used to generate the bandwidth request information is received from an upper device.

公开(公告)号：US20240323746A1

公开(公告)日：2024-09-26

申请号：US18578805

申请日：2021-10-12

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Kenji Miyamoto ,  Yoshihito SAKAI ,  Tatsuya SHIMADA ,  Keita Takahashi

IPC: H04W28/02 ,  H04L47/22

CPC classification number: H04W28/0236 ,  H04L47/225

Abstract: A communication system including one or more base stations that accommodates wireless terminals, one or more transfer apparatuses that transfer uplink communication of the wireless terminal received via the base station to an upper side, and a transfer apparatus controller that controls the one or more transfer apparatuses includes an information acquisition unit that acquires information on wireless communication between the base station and the wireless terminal for each traffic flow, a rate determination unit that determines a shaping rate of the traffic shaping for each traffic flow, so that delay jitter in the base station is mitigated on an upper side with respect to the base station, on the basis of the information on the wireless communication for each traffic flow, and a communication control unit that executes traffic shaping on the upper side with respect to the base station on the basis of the shaping rate determined by the rate determination unit.