公开(公告)号：US20220360332A1

公开(公告)日：2022-11-10

申请号：US17620969

申请日：2020-06-10

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Satoshi NARIKAWA ,  Tatsuya FUKUI ,  Takahito KIRIHARA ,  Katsuya MINAMI ,  Satoshi IKEDA ,  Shunsuke SARUWATARI ,  Takashi WATANABE ,  Kazuhiko KINOSHITA

IPC: H04B10/2575

Abstract: The present disclosure aims to make it possible to simultaneously establish communication between many freely-selected radio terminals without using a complex relay network or a plurality of radio relays. The present disclosure is a communication network system including: a plurality of optical-radio converters 521-1 to 521-n that convert a radio signal and an optical fiber radio signal into each other; and a path controller that is connected to the plurality of optical-radio converters 521-1 to 521-n through optical fiber transmission lines 531-1 to 531-n, receives input of an optical fiber radio signal transmitted from any optical-radio converter of the plurality of optical-radio converters 521-1 to 521-n from the optical fiber transmission line connected to the optical-radio converter, and outputs the optical fiber radio signal to the optical fiber transmission line connected to a set optical-radio converter of the plurality of optical-radio converters 521-1 to 521-n.

公开(公告)号：US20220299620A1

公开(公告)日：2022-09-22

申请号：US17636558

申请日：2020-08-19

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tomoki MURAKAMI ,  Hirantha ABEYSEKERA ,  Shunsuke SARUWATARI ,  Takeru FUKUSHIMA ,  Yusuke IWASAKI ,  Takashi WATANABE

IPC: G01S13/06 ,  G01S5/02 ,  G02B30/56

Abstract: A spatial image generation apparatus includes: a propagation channel information measurer that measures propagation channel information of a target area from radio signals delivered between transmitting and receiving stations; a learned model generator that generates a learned model for generating a spatial image of the target area from the newly input propagation channel information using the propagation channel information and image information obtained by imaging the target area with a camera; and an image generator that generates the spatial image of the target area by inputting the propagation channel information newly input from the propagation channel information measurer to the learned model. The object detection apparatus includes: the spatial image generation apparatus; and an object detector that detects an object in the target area from the spatial image generated by the image generator using an image analysis method.

公开(公告)号：US20240121780A1

公开(公告)日：2024-04-11

申请号：US17768456

申请日：2020-10-13

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Ryota SHIINA ,  Tatsuya FUKUI ,  Satoshi NARIKAWA ,  Katsuya MINAMI ,  Satoshi IKEDA ,  Shunsuke SARUWATARI ,  Takashi WATANABE ,  Kazuhiko KINOSHITA

IPC: H04W72/20 ,  H04B10/2575 ,  H04B10/27 ,  H04W88/10

CPC classification number: H04W72/20 ,  H04B10/2575 ,  H04B10/27 ,  H04W88/10

Abstract: An object is to provide a communication system in which there are no restrictions on a communicable area and it is not necessary to install communication software on a wireless device. A communication system according to the present invention is configured so that the functions of a wireless access point are separated into a front-end unit on a wireless terminal side and a back-end side on the Internet side, radio signal processing functions supporting a wireless scheme of the wireless terminal are deployed only on the back end, and only relatively simple processing functions such as E/O conversion are deployed on the front end near the wireless terminal 311.