公开(公告)号：US20210336706A1

公开(公告)日：2021-10-28

申请号：US17273282

申请日：2019-08-27

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Noriko IIYAMA ,  Masamichi FUJIWARA ,  Junichi KANI

IPC: H04B10/69 ,  H04B10/61

Abstract: An ADC (12) in an optical receiver (1) generates a sample signal composed of time series samples by oversampling a received signal that is an electrical signal converted from an optical signal by a light receiving unit (11). A symbol timing detection unit (132) of a DSP unit (13) detects a symbol timing in the sample signal. When it is determined that a symbol timing is appearing at a longer interval than a predetermined interval based on this detection result, a symbol timing adjusting unit (133) skips one or more samples included in the sample signal to read out samples at the predetermined interval, while when it is determined that the symbol timing is appearing at a shorter interval than the predetermined interval, the symbol timing adjusting unit inserts the same samples as one or more samples included in the sample signal immediately after the one or more samples to read out the samples at the predetermined interval.

公开(公告)号：US20210258075A1

公开(公告)日：2021-08-19

申请号：US17252435

申请日：2019-06-05

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Noriko IIYAMA ,  Masamichi FUJIWARA ,  Junichi KANI

IPC: H04B10/2507 ,  H04B10/60

Abstract: A signal processing device included in an optical reception device configured to receive a burst optical signal transmitted by one of a plurality of optical transmission devices, includes a symbol timing detecting unit configured to detect a symbol timing based on sample signals obtained by oversampling the burst optical signal converted into an electric signal with a sampling rate higher than a symbol rate, an adaptive equalization filter unit configured to perform an equalization process on the sample signals, and a timing matching unit configured to match timing such that, when the adaptive equalization filter unit takes in the sample signals, one of the taken-in sample signals corresponding to the symbol timing is given to a tap of which a tap coefficient has a maximum value among taps included in the adaptive equalization filter unit.

公开(公告)号：US20230246876A1

公开(公告)日：2023-08-03

申请号：US18007645

申请日：2020-06-08

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Noriko IIYAMA ,  Masamichi FUJIWARA ,  Hiroo SUZUKI ,  Junichi KANI

IPC: H04L12/44 ,  H04L5/00

CPC classification number: H04L12/44 ,  H04L5/0048

Abstract: A communication device includes: a MAC unit that processes a main signal including a payload, and determines a communication timing of the main signal; a communication unit that performs, based on the communication timing, at least one of transmission processing for E/O converting the main signal acquired from the MAC unit, and transmitting the main signal to a communication counterpart device, and reception processing for O/E converting the main signal received from the communication counterpart device; a main signal transmission line through which the main signal is transmitted between the MAC unit and the communication unit; and a control information transmission line that is provided separately from the main signal transmission line, and through which communication timing data that is data indicating the communication timing is transmitted from the MAC unit to the communication unit.

公开(公告)号：US20150373640A1

公开(公告)日：2015-12-24

申请号：US14654783

申请日：2013-12-17

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Noriko IIYAMA ,  Jun-ichi KANI ,  Naotaka SHIBATA

IPC: H04W52/02 ,  H04B10/2575 ,  H04W72/12 ,  H04Q11/00

CPC classification number: H04W52/0203 ,  H04B10/25753 ,  H04B10/272 ,  H04Q11/0067 ,  H04Q2011/0064 ,  H04Q2011/0086 ,  H04W72/1289 ,  H04W88/085 ,  Y02D70/1262 ,  Y02D70/146 ,  Y02D70/24 ,  Y02D70/46

Abstract: A method of operating an optical-wireless access system, wherein an ONU obtains information on dynamic scheduling control of the optical-wireless access system, information on discontinuous reception control of the optical-wireless access system, or both of them, and such information is used in the ONU or transferred to an OLT and used as parameters of scheduling in the PON and sleep control.

Abstract translation: 一种操作光无线接入系统的方法，其中ONU获取关于光无线接入系统的动态调度控制的信息，关于光无线接入系统的不连续接收控制的信息，或者它们两者，这些信息是 在ONU中使用或传输到OLT并用作PON中的调度参数和睡眠控制。

公开(公告)号：US20150311980A1

公开(公告)日：2015-10-29

申请号：US14441423

申请日：2013-11-06

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Shigeru KUWANO ,  Jun TERADA ,  Noriko IIYAMA ,  Takeshi SAKAMOTO ,  Nobuyuki TANAKA ,  Satoshi SHIGEMATSU

IPC: H04B10/27 ,  H04J14/08 ,  H04B10/2575

CPC classification number: H04B10/27 ,  H04B10/25752 ,  H04J14/08 ,  H04L12/2861 ,  H04Q11/0067 ,  H04Q2011/0064

Abstract: This invention provides a communication system constituted of a higher-network apparatus and a lower-network apparatus connected through a PON system, and an object of the invention is to transfer uplink data from the lower-network apparatus to the higher-network apparatus at high speed so as to meet severe conditions required for a delay time between the higher-network apparatus and the lower-network apparatus.This invention further provides an optical communication method including in order a scheduling execution process in which a higher-network apparatus 1 performs, with respect to one or a plurality of lower-network apparatus 5 communicating with the device 1 itself, scheduling for uplink communication from each of the lower-network apparatus 5 to the device 1 itself and an uplink data transmission permission process in which the higher-network apparatus 1 calculates a transmission time and a transmission permission amount of uplink data transmitted from an ONU 4 to OLT 2 based on the scheduling for uplink communication and notifies the OLT 2, which is the OLT 2 connected to the lower network of the apparatus 1 itself and is connected to one or a plurality of the ONUs 4, connected to the higher network of each of the lower-network apparatus 5, through an optical fiber section 3, of the transmission time and the transmission permission amount of the uplink data.

Abstract translation: 本发明提供一种由通过PON系统连接的较高网络装置和下位网络装置构成的通信系统，其目的在于将上行数据从较低网络装置高速传输到较高网络装置 以便满足在较高网络设备与较低网络设备之间的延迟时间所需的苛刻条件。 本发明还提供了一种光通信方法，其包括以下步骤：对于与上述设备1本身进行通信的一个或多个下位网络装置5，上位机装置1执行的调度执行处理，进行上行链路通信的调度 下位网络设备5到设备1本身以及上行数据传输许可处理，其中上位机设备1基于从ONU4发送到OLT 2的上行链路数据的传输时间和发送允许量，基于 上行链路通信的调度，通知连接到设备1本身的下层网络的OLT2的OLT2，并连接到与各个下位机的每个的较高网络连接的一个或多个ONU 4， 网络装置5通过光纤部分3发送上行数据的发送时间和发送允许量。