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1. 发明专利

JP2010273260A Optical access system 有权
标题翻译：光学访问系统
公开(公告)号：JP2010273260A
公开(公告)日：2010-12-02
申请号：JP2009125270
申请日：2009-05-25
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OHIRA MASATERU , KAZAWA TORU , YAJIMA YUSUKE , TSUCHIYA AKIHIKO
IPC分类号： H04L12/44
CPC分类号： H04Q11/0067 , H04L1/0009 , H04L1/0025 , H04L1/0057 , H04L1/0075 , H04Q11/0071 , H04Q2011/0079
摘要： PROBLEM TO BE SOLVED: To provide an optical access system in which hardware scale can be reduced when selecting an FEC code in accordance with a communication distance or communication quality with each ONT 2 and delay of a response to band allocation considering a degree of redundancy of FEC can be delayed and which is suitable for downlink multicast data and overhead communication for transmitting the same signal to a plurality of ONTs 2. SOLUTION: A plurality of candidates for an FEC code, that may be selected, are predetermined for each ONT 2 and an OLT 1 includes: a means for storing in a table a degree of redundancy for each FEC code and a code length; a means for selecting which FEC code is to be used; a means for performing encoding or decoding using the selected FEC code; a means for calculating a bandwidth while taking into account the degree of redundancy of FEC and the code length by referring to the table when calculating band allocation; and a means for notifying the opposite party ONT 2 of the selected FEC code. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种光接入系统，其中当根据与每个ONT 2的通信距离或通信质量选择FEC码并且考虑到对频带分配的响应的延迟来选择FEC码时，可以减少硬件比例 FEC的冗余可以被延迟，并且适用于下行多播数据和开销通信，用于将相同的信号发送到多个ONT2。解决方案：可以选择的用于FEC码的多个候选者是对于每个ONT 2和OLT 1预定的包括：用于在表中存储每个FEC码的冗余度和码长度的装置; 用于选择要使用哪个FEC码的装置; 用于使用所选择的FEC码进行编码或解码的装置; 用于在计算频带分配时参照表格考虑FEC的冗余度和码长度来计算带宽的装置; 以及用于通知对方ONT 2所选择的FEC码的装置。版权所有（C）2011，JPO＆INPIT

2. 发明专利

JP2003244090A DEMULTIPLEXING METHOD FOR TRANSMISSION APPARATUS 审中-公开
公开(公告)号：JP2003244090A
公开(公告)日：2003-08-29
申请号：JP2003074800
申请日：2003-03-19
申请人： HITACHI LTD
发明人： SUGAWARA TOSHIKI , OHIRA MASATERU , NAKANO YUKIO , MORI TAKASHI
IPC分类号： H04J3/00
摘要： PROBLEM TO BE SOLVED: To provide transmission apparatuses for passing an overhead on a midway transmission apparatus so as to attain transmission/reception of supervisory maintenance operation information employing the overhead between optional transmission apparatuses in a synchronous multiplex network. SOLUTION: The multiplex transmission apparatus for receiving a multiplex signal comprising a payload resulting from multiplexing a plurality of main signals and an overhead byte including a plurality of supervisory maintenance operation information items to execute termination processing of the supervisory maintenance operation information items and transmission processing of the payload, for converting the processed signal into a multiplex signal including the payload subjected to transmission processing and a plurality of the supervisory maintenance operation information items and for transmitting the resulting multiplex signal, includes an overhead passing means comprising: a means for extracting prescribed supervisory maintenance operation information items from the received multiplex signal; an edit means for editing the information extracted by the extract means; and an inserting means for inserting an output of the edit means to a prescribed bit location of the overhead byte of the transmitter side multiplex signal and passing the maintenance information. COPYRIGHT: (C)2003,JPO

3. 发明专利

JP2001358597A METHOD FOR CONSTITUTING ERROR-CORRECTING CODE, DECODING METHOD, TRANSMITTER, AND NETWORK 失效
公开(公告)号：JP2001358597A
公开(公告)日：2001-12-26
申请号：JP2000179377
申请日：2000-06-09
申请人： HITACHI LTD
发明人： OHIRA MASATERU , TAKATORI MASAHIRO , MORI TAKASHI
IPC分类号： G06F11/10 , H03M7/14 , H03M13/15 , H03M13/27 , H03M13/29 , H04L1/00 , H04L12/52
摘要： PROBLEM TO BE SOLVED: To provide a method for constituting error-correcting code by which the relaying interval of optical signals transmitted through one optical fiber can be quadrupled by maintaining the original transmitting distance when wavelength multiplexing is performed, even when the time-division multiplicity of the optical signals becomes about double and has a higher gain and a transmitter and a network using the method. SOLUTION: In the method of constituting error-correcting code, a code information block is obtained segmenting client signals having a fixed bit rate at every a-bytes, and a c-byte code block 3 is obtained by raising the bit rate so that the block 3 may have the code information block and a free b-byte area and the c/a ratio may become >=110%. Then the code information block in the block 3 is encoded into an error-correcting code so that the code may have an encoding gain of >=6 dB for the bit error rate of 10-12 and its check bit is arranged in the free area as a super FEC signal.

4. 发明专利

JPH1075222A MULTIPLEXED TRANSMITTER AND SIGNAL RECEIVER-TRANSMITTER 失效
公开(公告)号：JPH1075222A
公开(公告)日：1998-03-17
申请号：JP17352197
申请日：1997-06-30
申请人： HITACHI LTD
发明人： SUGAWARA TOSHIKI , NAKANO YUKIO , OHIRA MASATERU , MORI TAKASHI
IPC分类号： H04J3/00 , H04J3/12
摘要： PROBLEM TO BE SOLVED: To automatically deal with connected counter equipment through a multiplexed transmitter to which the counter equipment of synchronous optical network(SONET) or synchronous digital hierarchy(SDH) system is connected through a transmission line. SOLUTION: In this multiplexed transmitter consisting of a reception/ transmission part 1 for plural low-speed signals for housing the counter equipment of the SONET or SDH system, a multiplex/demultiplex converting part and a reception/transmission part 1 for the high-speed signals of SONET or SDH system, the reception/transmission part 1 for low-speed or high-speed signals comprises a reception side reception processing part 11 for receiving the SS bit of SONET/SDH signal received from the transmission line, an internal SS bit setting part 13 for defining the value of this received SS bit as an internal SS bit when this value is '10' or '00', a reception side transmission processing part 12 for turning the SS bit to '11' and transmitting it to the multiplex/demultiplex converting part at the transferring of alarm indication signal(AIS)-P, and a transmission side transmission processing part 22 for judging the SS bit equal with the internal SS bit concerning a signal from the multiplex/ demultiplex converting part and transmitting it to the transmission line.

5. 发明专利

JP2011254541A Optical terminating device and optical network unit 有权
标题翻译：光学终端设备和光网络单元
公开(公告)号：JP2011254541A
公开(公告)日：2011-12-15
申请号：JP2011192351
申请日：2011-09-05
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KAZAWA TORU , YAJIMA YUSUKE , OHIRA MASATERU
IPC分类号： H04B10/27 , H04B10/272 , H04J14/00 , H04J14/02
摘要： PROBLEM TO BE SOLVED: To prevent a decrease in utilization bands caused by a ranging procedure as far as possible in a WDM-PON system, in which a plurality of optical network units (ONUs) share a wavelength to perform transmission.SOLUTION: One wavelength dedicated to ranging is provided, ranging is performed only with the dedicated wavelength, and a reciprocation delay time is measured. Regarding other wavelengths, on the basis of the resultant reciprocation delay time, transmission signals from a plurality of optical network units (ONUs) are transmitted in time-division multiplexing. Furthermore, an optical line terminal (OLT) includes a burst receiving circuit only for the wavelength dedicated for the ranging, controls to adjust a transmission amplitude and a transmission phase for each ONU continuously to a ranging procedure, and aligns a reception amplitude and a reception phase to be equal for the OLT. Therefore, the OLT includes means for measuring an amplitude and a phase of a reception signal as the burst receiving circuit and has a table for managing the reception amplitude and the reception phase for each ONU.
摘要翻译：要解决的问题：为了防止在多个光网络单元（ONU）共享波长以进行传输的WDM-PON系统中尽可能地减少由测距过程引起的利用频带的降低。解决方案：提供专用于测距的一个波长，仅使用专用波长进行测距，并测量往复延迟时间。关于其他波长，基于所得的往复延迟时间，来自多个光网络单元（ONU）的传输信号以时分复用方式被发送。此外，光线路终端（OLT）仅包括专用于测距的波长的突发接收电路，控制将连续的每个ONU的发送振幅和发送相位调整到测距过程，并且对准接收振幅和接收相位相等于OLT。因此，OLT包括用于测量作为突发接收电路的接收信号的幅度和相位的装置，并具有用于管理每个ONU的接收振幅和接收相位的表。版权所有（C）2012，JPO＆INPIT

6. 发明专利

JPH11163820A MULTIPLEXING TRANSMITTER, POINTER PROCESSOR, MULTIPLEXED TRANSMISSION NETWORK AND CONFIGURATION METHOD OF MULTIPLEXING TRANSMITTER 失效
公开(公告)号：JPH11163820A
公开(公告)日：1999-06-18
申请号：JP32754197
申请日：1997-11-28
申请人： HITACHI LTD
发明人： OHIRA MASATERU , NOGUCHI MASAZUMI , KIMURA MITSUNOBU , MORI TAKASHI , OBAYASHI MASATAKE
IPC分类号： H04J3/00 , H04J3/14
摘要： PROBLEM TO BE SOLVED: To prevent the change of supervisory maintenance operationability which is accompanied with the configuration change of a transmission network by providing a means which selects prescribed maintenance information from plural maintenance information which are included in a received multiplexing signal and passes it by inserting it into an overhead byte of a sending side multiplexing signal. SOLUTION: This device consists of low speed signal transmitting/receiving units 10-1 to 10-M which input and output M sets of low speed multiplexing signals and process an overhead and a main signal, one set of a high speed signal transmitting/ receiving unit 11 which inputs and outputs a high speed multiplexing signal and processes the overhead and the main signal, a main signal multiple separation converting part 100 which performs multiple separation conversion of the main signal of the low speed multiplexing signal and the main signal of the high speed multiplexing signal and a controlling part 400 which controls the whole. Thus, it is possible to use the overhead between the desired transmitters by making the overhead that is preliminarily defined in a transmission system to be used pass and process.

7. 发明专利

JPH08162708A OPTICAL SEMICONDUCTOR AMPLIFIER 失效
公开(公告)号：JPH08162708A
公开(公告)日：1996-06-21
申请号：JP30184694
申请日：1994-12-06
申请人： HITACHI LTD
发明人： KANETAKE TATSURO , TAKANO HIDEAKI , OHIRA MASATERU , SUZUKI MAKOTO
IPC分类号： H01S5/00 , H01S5/042 , H01S3/18
摘要： PURPOSE: To obtain an optical semiconductor amplifier wherein a large saturated output value and a high gain are obtained satisfatorily and its optical coupling to such a transmission medium as an optical fiber is made easy. CONSTITUTION: An optical semiconductor amplifier which has an optical gain for the light of a wavelength to be used and has an optical waveguide including an active layer 15 having an identical structure over its whole region and varies the optical gain per unit length of the optical waveguide according to the traveling direction of the light.

8. 发明专利

JP2003273826A Multiplex transmitter and demultiplexer 有权
标题翻译：多路复用发射机和解复用器
公开(公告)号：JP2003273826A
公开(公告)日：2003-09-26
申请号：JP2003074797
申请日：2003-03-19
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SUGAWARA TOSHIKI , OHIRA MASATERU , NAKANO YUKIO , MORI TAKASHI
IPC分类号： H04J3/00
摘要： PROBLEM TO BE SOLVED: To provide a transmitter for allowing overhead to pass in a midway device so that monitoring and maintenance operation information can be transmitted and received, by using the overhead between arbitrary transmitters in a synchronous multiplex network.
SOLUTION: The multiplex transmitter receives a multiplexed signal, consisting of a payload having a plurality of multiplexed main signals and an overhead byte containing a plurality items of monitor and maintenance operating information, and converts the received signal into a multiplexed signal containing payload and information which are subjected to transmission processing, after executing the termination processing of the information and the transmission processing of the payload and the transmits the converted signal. The transmitter is provided with an overhead passing means for allowing maintenance information to pass, which consists of a means of extracting the prescribed monitor and maintenance operating information from the received multiplexed signal, an editing means for editing the information extracted by the extracting means and an inserting means for inserting the output of the editing means into a prescribed position of the overhead byte of the multiplexed signal of a transmitter side.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种用于允许开销在中途设备中通过的发射机，从而可以通过使用同步多路复用网络中的任意发射机之间的开销来发送和接收监视和维护操作信息。解决方案：多路复用发射机接收多路复用信号，由具有多个复用主信号的有效载荷和包含多个监视和维护操作信息的开销字节组成，并将接收信号转换为包含有效载荷的复用信号以及在执行信息的终止处理和有效载荷的发送处理之后进行发送处理的信息，并发送转换后的信号。发射机设置有用于允许维护信息通过的开销通过装置，其包括从接收的多路复用信号中提取规定的监视和维护操作信息的装置，用于编辑由提取装置提取的信息的编辑装置和插入装置，用于将编辑装置的输出插入到发射机侧的多路复用信号的开销字节的规定位置。版权所有（C）2003，JPO

9. 发明专利

JP2001024522A ERROR-CORRECTION CODE ENCODER, ERROR-CORRECTION CODE DECODER AND TRANSMITTER 失效
公开(公告)号：JP2001024522A
公开(公告)日：2001-01-26
申请号：JP19702399
申请日：1999-07-12
申请人： HITACHI LTD
发明人： OHIRA MASATERU , SHIBAZAKI MASATOSHI , YAJIMA YUSUKE , MORI TAKASHI
IPC分类号： H03M13/37 , H03M13/00 , H04L1/00
摘要： PROBLEM TO BE SOLVED: To obtain an encoder and a decoder capable of reducing manager's setting load concerning encoding and decoding even when the constitution of a transmission network is complicated and preventing data from causing phase jumps due to the ON/OFF switching of encoding and decoding. SOLUTION: Identifiers(Ids) different in encoding and non-encoding are imparted on a previously determined position of original signals and the decoder 1 reads out the set IDs, detects the encoding state and automatically judges the execution of decoding processing. Each of the encoder and the decoder 1 is provided with a delay output part 30 for simply applying a specific delay without encoding or decoding differently from the encoding or decoding processing parts and outputting the delayed result. It can be selected, by the setting of an external operation system 3, which of the signal from individual processing parts or the signal from the delay output part 30 is to be outputted.

10. 发明专利

JPH11220448A METHOD AND SYSTEM FOR MULTIPLEX TRANSMISSION 失效
公开(公告)号：JPH11220448A
公开(公告)日：1999-08-10
申请号：JP28066598
申请日：1998-10-02
申请人： HITACHI LTD
发明人： OHIRA MASATERU , NOGUCHI MASAZUMI , MORI TAKASHI , KIMURA MITSUNOBU , KATO KOJI
IPC分类号： H04J3/00 , H04J3/14 , H04L12/437
摘要： PROBLEM TO BE SOLVED: To surely conduct changeover of a redundancy system of transmission lines. SOLUTION: On the occurrence of a line interruption fault on OC 12 transmission lines from a multiplexer A to a multiplexer F, the multiplexer F detects that a transmission line is interrupted for a reception signal from the OC-12 transmission lines, and transfers automatic protection switching(APS) bytes from the multiplexer A to a multiplexer G. In this case, the APS bytes are inserted to an unspecified area of an OC-192 transmission overhead determined in advance for passing-transfer of the APS bytes. The multiplexer G inserts the received passing-transfer APS bytes to a specified position of the APS bytes on the OC-12 transmission overhead and sends resulting data to the multiplexer D. Thus, a redundancy changeover between the multiplexer A and D is realized in this way.

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