公开(公告)号：US20150037035A1

公开(公告)日：2015-02-05

申请号：US14448097

申请日：2014-07-31

Applicant: HITACHI, LTD.

Inventor： Jun SUGAWA ,  Toshiyuki ODAKA

IPC: H04B10/27 ,  H04B10/25 ,  H04J14/08 ,  H04B10/40

CPC classification number: H04J14/08 ,  H04J14/0226 ,  H04J14/0238 ,  H04J14/025 ,  H04J14/0282

Abstract: Provided is a network system including a subscriber apparatus and a station-side apparatus connected with the subscriber apparatus via an optical line. The subscriber apparatus includes a transceiver for receiving an instruction to change wavelengths for signals to be sent and received, receiving a downstream signal sent from the station-side apparatus and having a wavelength designated by the instruction, and sending an upstream signal having a wavelength designated by the instruction to the station-side apparatus. The subscriber apparatus includes a controller for identifying at least one property of the received downstream signal and determining wavelengths for signals to be sent and received based on the identified at least one property.

Abstract translation: 提供了一种网络系统，包括经由光线路与用户装置连接的用户装置和站侧装置。 用户装置包括：收发器，用于接收改变要发送和接收的信号的波长的指令;接收从站侧装置发送的下行信号，并具有由指令指定的波长;以及发送具有指定波长的上行信号 通过指示到站侧设备。 订户装置包括控制器，用于基于所识别的至少一个属性来识别所接收的下行信号的至少一个属性并确定要发送和接收的信号的波长。

公开(公告)号：US20170237828A1

公开(公告)日：2017-08-17

申请号：US15346899

申请日：2016-11-09

Applicant: HITACHI, LTD.

Inventor： Taisuke UETA ,  Masayuki TAKASE ,  Jun SUGAWA ,  Yasunari SHINOHARA

IPC: H04L29/08 ,  H04L12/46 ,  H04L29/06

CPC classification number: H04L67/34 ,  H04L12/4641 ,  H04L67/10 ,  H04L67/327 ,  H04L67/42 ,  H04W88/02

Abstract: To enable a communication apparatus, which transmits and receives data with a partially reconfigurable logic circuit, to configure a module while continuing a communication process. A communication apparatus transmits and receives data and includes a partially reconfigurable logic circuit and a management unit for managing a circuit configuration of the logic circuit. The logic circuit includes a plurality of modules and a data distribution unit. The management unit fixedly arranges a plurality of coupling interfaces, which are used for sending data to a module determined as a distribution destination of data by the data distribution unit and which are respectively linkable to the plurality of modules, at prescribed positions on the logic circuit, and creates the module in the partially reconfigurable area of the logic circuit so as to be linked to any of the plurality of coupling interfaces.

公开(公告)号：US20150229431A1

公开(公告)日：2015-08-13

申请号：US14575017

申请日：2014-12-18

Applicant: HITACHI, LTD.

Inventor： Jun SUGAWA ,  Toshiyuki ODAKA

IPC: H04J14/02

CPC classification number: H04J14/0282 ,  H04J14/0257

Abstract: Provided is a station-side apparatus configured to conduct optical communication with a plurality of subscriber apparatuses via a plurality of wavelengths. The station-side apparatus includes a storage apparatus, management information stored in the storage apparatus and configured to indicate whether or not a subscriber apparatus is a first apparatus whose wavelength used for communication is changed to another wavelength, and a transmission unit configured to transmit downlink frames addressed to the plurality of subscriber apparatuses in an order of transmission determined based on the management information.

Abstract translation: 提供了一种被配置为经由多个波长与多个用户装置进行光通信的站侧装置。 站侧装置包括存储装置，存储在存储装置中的管理信息，用于指示用户装置是否是用于通信的波长变为另一波长的第一装置，以及发送单元，用于发送下行链路 以基于管理信息确定的传输顺序寻址到多个用户装置的帧。

公开(公告)号：US20140294388A1

公开(公告)日：2014-10-02

申请号：US14065750

申请日：2013-10-29

Applicant: Hitachi, Ltd.

Inventor： Toshiyuki ODAKA ,  Jun SUGAWA ,  Hidehiro TOYODA

IPC: H04B10/27

CPC classification number: H04B10/27 ,  H04J3/1694 ,  H04Q11/0067 ,  H04Q2011/0064 ,  H04Q2011/0086

Abstract: In a PON system in which plural kinds of modulation schemes coexist, when uplink burst signals from respective ONUs are received, the receiving efficiency degrades as the number of the times of switching of the modulation scheme increases. In an optical access (PON) system supporting plural kinds of modulation schemes, an OLT allocates bandwidths for uplink signals, i.e., transmission timings each including a transmission start time and a transmission duration, to ONUs, respectively, such that the bandwidths allocated to plural ONUs for the same modulation scheme are as successive as possible. Based on the transmission timings allocated to the respective ONUs, the OLT switches the modulation scheme of a modulation-scheme variable burst-mode optical transmitter/receiver by control of a modulation scheme controller.

Abstract translation: 在多种调制方案共存的PON系统中，当接收到来自各个ONU的上行链路突发信号时，接收效率随着调制方案的切换次数的增加而降低。 在支持多种调制方式的光接入（PON）系统中，OLT分别向ONU分配用于上行链路信号的带宽（即，包括发送开始时间和发送持续时间的发送定时），使得分配给多个 相同调制方案的ONU尽可能连续。 基于分配给各个ONU的传输定时，OLT通过调制方案控制器的控制来切换调制方案可变突发模式光发射机/接收机的调制方案。

公开(公告)号：US20140161456A1

公开(公告)日：2014-06-12

申请号：US13783646

申请日：2013-03-04

Applicant: HITACHI, LTD.

Inventor： Jun SUGAWA ,  Toshiyuki ODAKA ,  Hidehiro TOYODA

IPC: H04J14/02

CPC classification number: H04J14/0227 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/025 ,  H04J14/0252 ,  H04J14/0254 ,  H04J14/0257 ,  H04J14/026 ,  H04J14/0267 ,  H04J14/0282

Abstract: An aspect of this invention is a network system including subscriber apparatuses and a station-side apparatus for communicating with the subscriber apparatuses. The station-side apparatus communicates with the subscriber apparatuses using wavelengths. The station-side apparatus determines a wavelength to be used by each of at least one subscriber apparatus of the subscriber apparatuses based on effective transmission rates used by the subscriber apparatuses in communications with the station-side apparatus.

Abstract translation: 本发明的一个方面是一种网络系统，包括用户设备和用于与用户设备通信的站侧设备。 站侧装置使用波长与用户装置进行通信。 站侧装置基于用户装置在与站侧装置的通信中使用的有效传输速率来确定用户装置的至少一个用户装置中的每一个使用的波长。