公开(公告)号：US20240275725A1

公开(公告)日：2024-08-15

申请号：US18569167

申请日：2021-07-01

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshihito FUJIWARA ,  Satoshi NARIKAWA ,  Hiroya ONO

IPC: H04L47/122 ,  H04L47/193

CPC classification number: H04L47/122 ,  H04L47/193

Abstract: An object of the present disclosure is to provide a communication path switching method for improving a throughput of TCP communication at the time of switching a communication path between a first communication path that is at least one of a low latency or high speed and a second communication path that is at least one of a high latency or low speed.
The communication path switching method according to the present disclosure is a communication path switching method for switching a communication path to a first communication path or a second communication path by using operation of a TCP accelerator in a communication path switching system including a terminal that performs TCP communication by switching a communication path between the first communication path that is at least one of a low latency or high speed and the second communication path that is at least one of a high latency or low speed, the communication path switching method including: receiving data from the terminal; and when the data is first received after the communication path is switched from the first communication path to the second communication path, transmitting again to the terminal, an acknowledgement signal transmitted last before the communication path is switched.

公开(公告)号：US20240121505A1

公开(公告)日：2024-04-11

申请号：US18276225

申请日：2021-02-18

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hiroya ONO ,  Toshihito FUJIWARA ,  Tatsuya FUKUI

IPC: H04N23/66 ,  H04N5/262

CPC classification number: H04N23/66 ,  H04N5/2624

Abstract: An object of the present disclosure is to reduce a delay time from input of a plurality of videos to output of combined videos.
The present disclosure is a video combining device detecting a time deviation between a timing of a frame of each video and a predetermined timing when videos from a plurality of cameras are combined into one screen, giving an instruction for an imaging frame rate to the cameras such that the time deviation is reduced, and combining the videos from the plurality of cameras into one screen and outputting the combined videos.

公开(公告)号：US20230179531A1

公开(公告)日：2023-06-08

申请号：US17921078

申请日：2020-04-27

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshihito FUJIWARA ,  Hiroya ONO ,  Tomohiro TANIGUCHI

IPC: H04L47/263 ,  H04L67/10 ,  H04L1/00 ,  H04L43/0829 ,  H04L47/10 ,  H04N21/6405 ,  H04N21/24 ,  H04N21/238

CPC classification number: H04L47/263 ,  H04L67/10 ,  H04L1/004 ,  H04L43/0835 ,  H04L47/15 ,  H04N21/6405 ,  H04N21/2404 ,  H04N21/238

Abstract: The present disclosure aims to make it possible to transfer multicast packets at as high a rate as possible according to a state of a network, to perform high-quality and low-latency content distribution, and to perform stable multicast distribution on a network that is less likely to ensure a fixed available band such as a best-effort or wireless network.
The present disclosure is a content distribution system for converting part of communication for distribution into multicast communication, in which
a transmission-side edge server (UC/MC) applies Forward Error Correction to a multicast packet and transmits the multicast packet, a reception-side edge server (MC/UC) notifies the transmission-side edge server of information of packet loss of the received multicast packet, and
the transmission-side edge server (UC/MC) changes a transfer rate of a multicast packet to be transmitted based on the notified information of packet loss.

公开(公告)号：US20220263673A1

公开(公告)日：2022-08-18

申请号：US17627845

申请日：2019-07-23

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshihito FUJIWARA ,  Yasunobu KASAHARA ,  Satoshi IKEDA

IPC: H04L12/18 ,  H04L67/02

Abstract: An object of the present disclosure is to enable content to be efficiently transferred in an HTTP-based web delivery system while maintaining a unicast HTTP and further avoiding the limitations associated with the multicast.
In the present disclosure, a unicast-multicast converting apparatus 105, a multicast-unicast/multicast-multicast converting apparatus 113, and a multicast-unicast converting apparatus 114 are connected to a network between a content server 106 performing web delivery and a terminal 117 using a multicast communication networks 102 and 112. Through the multicast-unicast/multicast-multicast converting apparatus 113, a content group each including a plurality of contents grouped is transferred both in multicast and unicast.

公开(公告)号：US20240163245A1

公开(公告)日：2024-05-16

申请号：US18282405

申请日：2021-04-08

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tatsuya FUKUI ,  Toshihito FUJIWARA ,  Ryota SHIINA ,  Tomohiko IKEDA ,  Hiroya ONO

IPC: H04L61/00 ,  G06F3/14 ,  H04L9/40 ,  H04L49/35

CPC classification number: H04L61/35 ,  G06F3/14 ,  H04L49/35 ,  H04L63/08

Abstract: In order to solve the above problem, an object of the present invention is to provide a network system, a control method, a database, a controller, and a program capable of path construction in a device IF direct access network without disclosing connection information.
A network system according to the present invention (1) specifies and records a location on a network of a user and a device used by the user by using exchange of authentication data using a media signal of the device, and (2) when the user makes a connection request to content by using a user name, a controller solves location information on the network by using the user name, controls the network, and realizes connection between the content and the device.

公开(公告)号：US20240129033A1

公开(公告)日：2024-04-18

申请号：US18276563

申请日：2021-02-26

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Satoshi NARIKAWA ,  Toshihito FUJIWARA ,  Hiroya ONO

IPC: H04B10/29 ,  G01S5/18 ,  H04B10/40

CPC classification number: H04B10/29 ,  G01S5/18 ,  H04B10/40

Abstract: An object of the present invention is to provide a communication method, a transceiver, a relay, a communication system, and a program capable of performing high-speed communication even in a case where there is an obstacle between two separated points in water.
In this communication method, two points each confirm the other's position by using sound wave communication which is likely to be diffracted as a wave due to a relatively small frequency and a large wavelength. Since the communication method uses optical wireless communication in which straightness is high but high-speed communication is possible, a relay capable of forming a path for communication while avoiding an obstacle is selected from a plurality of relays. In this communication method, signals are transmitted and received by using optical wireless communication using a relay on the path.

公开(公告)号：US20240121005A1

公开(公告)日：2024-04-11

申请号：US18276249

申请日：2021-02-26

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Satoshi NARIKAWA ,  Toshihito FUJIWARA ,  Hiroya ONO

IPC: H04B10/29 ,  H04B10/40

CPC classification number: H04B10/29 ,  H04B10/40

Abstract: An object of the present invention is to provide a communication method, a transceiver, a relay, a communication system, and a program capable of performing high-speed communication even in a case where there is an obstacle between two separated points in water.
In this communication method, two points each confirm the other's position by using sound wave communication which is likely to be diffracted as a wave due to a relatively small frequency and a large wavelength. Since the communication method uses optical wireless communication in which straightness is high but high-speed communication is possible, a path for communication while avoiding an obstacle via a relay is calculated. In the communication method, the relay is guided and moved to an appropriate place according to the calculated path, and a signal is transmitted and received by using optical wireless communication using the relay that has moved to an appropriate place.

公开(公告)号：US20240063906A1

公开(公告)日：2024-02-22

申请号：US18270394

申请日：2021-01-04

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Ryota SHIINA ,  Toshihito FUJIWARA ,  Shinya TAMAKI ,  Tomohiro TANIGUCHI

IPC: H04B10/112 ,  H04W28/02

CPC classification number: H04B10/1129 ,  H04W28/0231

Abstract: An object of the present disclosure is to reduce a system load imbalance between APs and unfairness in communication quality between users subordinate to each AP.
The present disclosure includes: a plurality of radio base stations that perform wireless communication with terminals; a plurality of optical base stations that are arranged in a communication area of at least one of the plurality of radio base stations and transmit, to a terminal by using an optical signal, an optical ID indicating connection information and authentication information for communicating with an available radio base station among the plurality of radio base stations; and a base station control device that collects, from individual radio base stations, communication quality information of the terminals, determines a deviation in the communication quality of the terminals between the plurality of radio base stations, and when the deviation occurs in the communication quality of the terminals between the plurality of radio base stations, causes fewer optical base stations to transmit the optical ID for communicating with the radio base station having the deviation.

公开(公告)号：US20230396605A1

公开(公告)日：2023-12-07

申请号：US18032770

申请日：2020-10-28

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshihito FUJIWARA ,  Tatsuya FUKUI ,  Tomohiro TANIGUCHI ,  Tomohiko IKEDA ,  Hiroya ONO ,  Ryota SHIINA

IPC: H04L9/40

CPC classification number: H04L63/083

Abstract: An object of the present invention is to provide a network authentication system and a network authentication method capable of highly securely authenticating connection or a use place of a device without depending on a connection interface system in a mode in which a device such as audio/video equipment is directly connected to a public network. A network authentication system according to the present invention generates authentication information by a device other than a device such as audio/video equipment, and transmits the authentication information to the device as a media signal.

公开(公告)号：US20230140859A1

公开(公告)日：2023-05-11

申请号：US17920505

申请日：2020-04-27

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshihito FUJIWARA ,  Tomohiro TANIGUCHI ,  Hiroya ONO

IPC: H04N21/266 ,  H04N21/6405 ,  H04N21/222

CPC classification number: H04N21/26616 ,  H04N21/6405 ,  H04N21/222

Abstract: An object of the present disclosure is to distribute content with a high quality and low latency without being limited by a low-rate and unstable network and a low-capacity reception-side edge servers while maintaining sufficient traffic reduction effects.
A content distribution system according to the present disclosure converts part of communication for distribution into multicast communication. In the content distribution system, a transmission-side edge server (UC/MC) generates and transmits a plurality of multicast streams having different transfer rates for the same input content, and a reception-side edge server (MC/UC) selects and receives a multicast stream having a desired transfer rate among the plurality of transmitted multicast streams.