专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2004254339A Communication network and communication network node device 审中-公开
公开(公告)号：JP2004254339A
公开(公告)日：2004-09-09
申请号：JP2004116621
申请日：2004-04-12
申请人： Nec Corp , 日本電気株式会社
发明人： SHIRAGAKI TATSUYA , NISHIO MAKOTO , HENMI NAOYA , TAKESHITA HITOSHI , SHIMOMURA HIROSHI
IPC分类号： H04L12/437 , H04B10/03 , H04B10/032 , H04B10/077 , H04B10/27 , H04B10/275 , H04B10/291 , H04J14/00 , H04J14/02 , H04B10/02 , H04B10/20
摘要： PROBLEM TO BE SOLVED: To compose a ring system in which using efficiency of ET path is high during trouble or maintenance time, composition of an alternative route with a little delay difference is possible, high speed trouble recovery is possible even for an ultra long distance ring according to the trouble condition, and reliability at trouble time is high. SOLUTION: In a condition that an ET (Extra Traffic, Stand-by Access) path of wave length λ1 is composed between a node 109 to a node 107 on a stand-by ring 104, if a disconnection trouble occurs in an optical fiber of an active ring 101 between a node 106 and the node 109, a supervisory control device in the node 107 detects the trouble in the optical path 601, carries out messaging to relating nodes, and separates the ET path from the node 109 to the node 107 in order to carry out separation of a short path (stand-by path 602) on the standby ring 104. If the node 107 confirms separation of the ET path, it requests sending of a main signal light to the node 106 via the stand-by ring 104. The node 106 changes over an optical switch to send the light also to the stand-by ring 104 in accordance with the request. In this method, stand-by resources which are used in trouble or maintenance time, can be used effectively used, and a system in which the delay difference of active path and the stand-by path during maintenance time can be composed. COPYRIGHT: (C)2004,JPO&NCIPI

2. 发明专利

JPH11275614A Photo switching device 失效
标题翻译：照片切换装置
公开(公告)号：JPH11275614A
公开(公告)日：1999-10-08
申请号：JP7950098
申请日：1998-03-26
申请人： Nec Corp , 日本電気株式会社
发明人： SUEMURA TAKEHIKO , HENMI NAOYA
IPC分类号： H04B10/27 , H04B10/291 , H04J14/00 , H04J14/02 , H04Q3/52 , H04Q11/00 , H04B10/02
CPC分类号： H04Q11/0005 , H04Q2011/0009 , H04Q2011/0011 , H04Q2011/0013 , H04Q2011/0016 , H04Q2011/0058 , H04Q2011/0075
摘要： PROBLEM TO BE SOLVED: To provide a means which increases or decreases the multiplexing number of waveforms for a space division photo switching device or wavelength/ space division photo switching device, using wavelength multiplexing. SOLUTION: Optical signals, inputted from an optical transmission line 10 for input and having wavelength λ0-λ7, are multiplexed by means of an optical multiplexer 31 and inputted to an optical wavelength router 6. The wavelength- multiplexed optical signals having the wavelengths λ0, λ2, λ4, and λ6 and those having the wavelengths λ1, λ3, λ5, and λ7 are respectively outputted from the output ports o0, o2 and o1, o3 of the router 6. A space division optical switch 32 is composed of a 4×16 optical cross-bar switch which can make multicasting up to 1:16. An optical wavelength selector 33 selects an optical signal having a desired wavelength from the wavelength-multiplexed optical signals, outputted from the switch 32 and having four wavelengths and sends the selected optical signal to an optical transmission line 11 for output.
摘要翻译：要解决的问题：提供一种使用波分复用技术来增加或减少空分光开关器件或波长/空分光切换器件的波形复用数的方法。解决方案：从用于输入并具有波长λ0-λ7的光传输线10输入的光信号通过光复用器31复用并输入到光波长路由器6.具有波长λ0，λ0的波分复用光信号，分别从路由器6的输出端口o0，o2，o1，o3输出波长λ1，λ3，λ5，λ7的λ2，λ4，λ6。空分光开关32由4× 16个光交叉开关，可以使组播达到1:16。光波长选择器33从开关32输出并具有四个波长的波分复用光信号中选择具有期望波长的光信号，并将所选择的光信号发送到光传输线11进行输出。

3. 发明专利

JP2003009195A Crossconnect switch 审中-公开
标题翻译：检测开关
公开(公告)号：JP2003009195A
公开(公告)日：2003-01-10
申请号：JP2001193870
申请日：2001-06-27
申请人： Nec Corp , 日本電気株式会社
发明人： TAKAHASHI SEIGO , HENMI NAOYA
IPC分类号： H04B10/27 , H04B10/00 , H04J3/00 , H04J14/02 , H04Q3/52 , H04Q3/68 , H04Q11/00 , H04B10/02
CPC分类号： H04Q11/0005 , H04J14/02 , H04Q3/68 , H04Q2011/0016 , H04Q2011/0024 , H04Q2011/0049 , H04Q2011/0056
摘要： PROBLEM TO BE SOLVED: To provide a crossconnect switch in which the number of unit switches can be decreased as compared with a conventional one.
SOLUTION: In the combination of a large scale switch S0 employing a Clos network and a wavelength multiplexed transmission line, only a route (more specifically, a fiber) is specified as the output of switch S2 and a specific designation of switch output port or wavelength may be omitted. Since the unit switch at the third stage of a three stage Clos switch is eliminated, size of the switch can be reduced.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供与常规开关相比可以减少单元开关数量的交叉连接开关。解决方案：在采用Clos网络和波长复用传输线路的大规模开关S0的组合中，仅将路由（更具体地，光纤）指定为开关S2的输出，并且指定开关输出端口或波长可以省略。由于消除了三级Clos开关的第三级的单元开关，因此可以减小开关的尺寸。

4. 发明专利

JP2000078176A Communication network and communication network node device 审中-公开
标题翻译：通信网络和通信网络节点设备
公开(公告)号：JP2000078176A
公开(公告)日：2000-03-14
申请号：JP14335899
申请日：1999-05-24
申请人： Nec Corp , 日本電気株式会社
发明人： SHIRAGAKI TATSUYA , NISHIO MAKOTO , HENMI NAOYA , TAKESHITA HITOSHI , SHIMOMURA HIROSHI
IPC分类号： H04B10/03 , H04B10/032 , H04B10/077 , H04B10/079 , H04B10/275 , H04B10/29 , H04L12/24 , H04L12/26 , H04L12/28 , H04L12/42 , H04L12/43 , H04L12/437 , H04M3/00 , H04Q3/52 , H04B10/02
摘要： PROBLEM TO BE SOLVED: To provide a ring system, which can effectively utilize auxiliary resources to be used in the case of fault or maintenance and reduces a delay difference between active and detour paths at the time of maintenance. SOLUTION: When a disconnection fault occurs on the optical fiber of an active ring 101 between nodes 106 and 109 in the state of constituting the ET path of wavelength λ1 from the node 109 to a node 107 on a reserve ring 104, a supervisory controller in the node 107 detects the fault on an optical path 601, performs messaging to related nodes in order to disconnect a short path (reserve path 602) on the reserve ring 104 and disconnects the ET path of wavelength λ1 from the node 109 to the node 107. When the disconnection of the ET path is confirmed, the node 107 requests the transmission of main signal light through the reserve ring 104 to the node 106. According to that request, at the node 106, an optical switch is changed over for sending light to the reserve ring 104 as well.
摘要翻译：要解决的问题：提供一种环形系统，其可以在故障或维护的情况下有效地利用辅助资源，并且在维护时减少主动和迂回路径之间的延迟差异。解决方案：在构成从节点109到储备环104上的节点107的波长λ1的ET路径的状态下，在节点106和109之间的活动环101的光纤上发生断线故障时，节点107检测光路601上的故障，对相关节点执行消息传递，以便断开保留环104上的短路径（预留路径602），并将波长λ1的ET路径从节点109断开到节点107 当确定了ET路径的断开时，节点107请求通过保留环104将主信号光发送到节点106.根据该请求，在节点106处，切换光开关以发送光还到储备环104。

5. 发明专利

JP2004007802A COMMUNICATION NETWORK AND FAULT RECOVERY SYSTEM 审中-公开
公开(公告)号：JP2004007802A
公开(公告)日：2004-01-08
申请号：JP2003280930
申请日：2003-07-28
申请人： NEC CORP
发明人： SHIRAGAKI TATSUYA , HENMI NAOYA
IPC分类号： H04L12/707 , H04L12/437 , H04L12/711 , H04L12/56
摘要： PROBLEM TO BE SOLVED: To build up a low-cost ring system wherein the total length of a ring is long, optical paths are efficiently contained, and an optical signal is subjected to insertion, demultiplexing, multiplexing. SOLUTION: Active optical paths are assigned to active rings 101, 103 without fail and standby rings 102, 104 are used for the respective shared resources. On the occurrence of a fault in an active optical path 401, for example, occurrence of a broken fault of an optical fiber between nodes 105 and 106, a termination node 108 transmits a switching request to a source node 106 without loopback changeover so as to recover the fault by operating a switch of the source node 106 to take a bypass to a standby optical path 402. COPYRIGHT: (C)2004,JPO

6. 发明专利

JP2000278222A OPTICAL RECEPTION CIRCUIT 失效
公开(公告)号：JP2000278222A
公开(公告)日：2000-10-06
申请号：JP8533399
申请日：1999-03-29
申请人： NEC CORP
发明人： TAJIMA AKIO , TAKAHASHI HIROAKI , ARAKI SOICHIRO , HENMI NAOYA , SUEMURA TAKEHIKO , MAENO YOSHIHARU , TAKAHASHI SEIGO
IPC分类号： H03F3/08 , H04B10/07 , H04B10/2507 , H04B10/293 , H04B10/40 , H04B10/50 , H04B10/564 , H04B10/572 , H04B10/60 , H04B10/69 , H04B10/28 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/26
摘要： PROBLEM TO BE SOLVED: To realize an optical receiver that is in operation at a high speed region of Gb/s or over and follows up level fluctuation in an input signal in several time slots and to provide an optical reception circuit that can realize an optical network with a large scale, a large capacity, a small size and a low latency. SOLUTION: The optical reception circuit 1 receiving photocurrent of a photodetector 5 comprises a preamplifier circuit 2, a mean value hold circuit 4 that holds a time-wise mean value of output voltages from the preamplifier circuit 2, and an output differential amplifier 3 placed to a post-stage of the preamplifier circuit 2. In the case of receiving a packet/a cell, the hold circuit 4 holds an output voltage from the preamplifier circuit 2 by using a sampling pulse, an output from the latch circuit 4 is given to an inverting terminal of the output differential amplifier 3 as reference voltage Vref for data identification and the amplifier 3 identifies and outputs data at an optimum identification level.

7. 发明专利

JP2000165425A COMMUNICATION NETWORK, COMMUNICATION NETWORK NODE DEVICE AND FAULT RECOVERY SYSTEM 失效
公开(公告)号：JP2000165425A
公开(公告)日：2000-06-16
申请号：JP33619498
申请日：1998-11-26
申请人： NEC CORP
发明人： SHIRAGAKI TATSUYA , HENMI NAOYA
IPC分类号： H04B10/27 , H04B10/03 , H04B10/032 , H04B10/077 , H04B10/275 , H04L12/42 , H04L12/437 , H04B10/02 , H04B10/20
摘要： PROBLEM TO BE SOLVED: To build up a ring system where a total length of a ring is long and that contains optical paths efficiently and applies insertion/demultiplexing-/ multiplexing to an optical signal at a low cost. SOLUTION: The system assigns active optical paths as many as possible to active rings 101, 103 and uses spare rings 102, 104 as shared resources for them. On the occurrence of a fault in an active optical path 401, that is, when an optical fiber is broken between nodes 105 and 106, no loopback is switched and a switching request from a termination node 108 to a source node 106 is sent to select a switch of the source node 106 to take a detour to a spare optical path 402 and then the fault can be recovered.

8. 发明专利

JPH1198141A LIGHT WAVE NETWORK SYSTEM 失效
公开(公告)号：JPH1198141A
公开(公告)日：1999-04-09
申请号：JP26825497
申请日：1997-09-16
申请人： NEC CORP
发明人： TAKESHITA HITOSHI , HENMI NAOYA
IPC分类号： H04L12/70 , H04Q11/04 , H04L12/28
摘要： PROBLEM TO BE SOLVED: To provide a light wave network system high in reliability, large in communication capacity for each service and capable of economically and flexibly dealing with a multimedia service having diversified formats and signal speeds. SOLUTION: This system consists of four layers; a multimedia service layer 101, an asynchronous transfer mode layer 102, an optical layer 103 and an optical fiber network layer 104. The optical layer 103 has a function of converting an electric signal into an optical signal with a proper carrier wavelength and of multiplexing an optical signal with a plurality of carrier wavelength bands to assign a wavelength to each inter-point connection and to transmit a signal to each wavelength path. This layer has no limitation on a format of a processed signal and is independent of signal transmission rate. Furthermore, this layer conducts fault/quality monitor of a wavelength path to conduct fault countermeasure of a physical network and executes high speed protection on the occurrence of a fault in wavelength path connection or deterioration in a wavelength path so as to recover the fault of the network physically at a high speed.

9. 发明专利

JPH06194697A WAVELENGTH MULTIPLEX REFERENCE LIGHT SOURCE 失效
公开(公告)号：JPH06194697A
公开(公告)日：1994-07-15
申请号：JP33263892
申请日：1992-12-14
申请人： NEC CORP
发明人： TAJIMA AKIO , HENMI NAOYA
IPC分类号： G02B27/10 , G02F1/35 , H01S3/06 , H01S3/07 , H01S3/094 , H01S3/10 , H01S3/131 , H04J14/00 , H04J14/02
摘要： PURPOSE:To provide the wavelength multiplex reference light source by which light rays of respective modes are stable oscillated at arbitrary wavelength intervals. CONSTITUTION:This wavelength multiplex reference light source consists of a light source 1 of a wavelength lambda1, a light source 2 of a wavelength lambda2, a one-to-one optical multiplexer 3 and an optical ring resonator 4. The optical ring resonator 4 is provided of an optical demultiplexer 5, an optical demultiplexer 6, a dispersion shift fiber 7 and an erbium doped fiber optical amplifier 8 and mixedly inputs the light of the wavelength K 1 and the light of the wavelength lambda2 to the optical ring resonator 4. The light of the frequency fm=f1+ or -nDELTAf (m, n are integers) regulated by a differential frequency DELTAf: ¦f1-f2¦ between f1=c/lambda1, f2=c/lambda2 (c is a light velocity) is generated within the optical fiber 7 within the optical ring resonator. This wavelength multiplex light is the light stable at the respective modes at equal frequency intervals within the band of the optical amplifier 8 within the optical ring resonator 4. The wavelength multiplex reference light source which can drastically decrease the number of the light sources as compared with the degrees of multiplexing and can arbitrarily set the wavelength intervals of the resulted light is realized.

10. 发明专利

JPH053456A OPTICAL COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH053456A
公开(公告)日：1993-01-08
申请号：JP19851091
申请日：1991-07-12
申请人： NEC CORP
发明人： HENMI NAOYA
IPC分类号： H04B10/61 , H04B10/2507 , H04B10/2513 , H04B10/516 , H04B10/54 , H04B10/548 , H04B10/564 , H04B10/588
摘要： PURPOSE:To realize the optical communication equipment in which dispersion distortion caused in a transmission line is easily equalized from an optical intensity modulation light sent through the transmission line with large dispersion. CONSTITUTION:A transmission unit 100 is provided with a semiconductor laser 101 being a carrier light exciting source, a bias source 102 giving a DC bias to the semiconductor laser 101, an external modulator 105 applying intensity modulation to an output light of the semiconductor laser and an optical filter 107 as a means outputting only a carrier light and a one-side band light as an external modulation light output. A reception unit 150 is provided with a receiver 151 applying square detection to the carrier light and the one-side band light supplied from the transmission unit 100 to obtain an electric signal and a linear filter 152 equalizing the electric signal.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式