CN1674469A - Multi-optical port optical wavelength converting unit - Google Patents
Multi-optical port optical wavelength converting unit Download PDFInfo
- Publication number
- CN1674469A CN1674469A CNA2004100398833A CN200410039883A CN1674469A CN 1674469 A CN1674469 A CN 1674469A CN A2004100398833 A CNA2004100398833 A CN A2004100398833A CN 200410039883 A CN200410039883 A CN 200410039883A CN 1674469 A CN1674469 A CN 1674469A
- Authority
- CN
- China
- Prior art keywords
- module
- signal
- optical wavelength
- wavelength conversion
- conversion element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 61
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- 238000004891 communication Methods 0.000 claims abstract description 12
- 238000003780 insertion Methods 0.000 claims abstract description 7
- 230000037431 insertion Effects 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims description 24
- 230000010354 integration Effects 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 16
- 239000013307 optical fiber Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Images
Landscapes
- Optical Communication System (AREA)
Abstract
The present invention relates to an optical communication equipment, and discloses a multi-interface optical wavelength conversion unit, so that it cam simply and economically implement shared optical channel protection. Said multi-interface optical wavelength conversion unit can utilize at least 4X4 electrically-crossed modules to connect two wavelength division multiplexing side transmitting/receiving units and two customer side transmitting/receiving units, and can utilize the insertion and fetch protection reverse protocol in said optical wavelength conversion unit interior and control the connection of crossed modules so as to implement optical channel shared protection.
Description
Technical field
The present invention relates to optical communication apparatus, particularly share many light mouth optical wavelength conversion element of Optical Channel Protection function.
Background technology
Along with developing rapidly of multimedia services such as interactive service, broadcasting service, the broadband, at a high speed, the characteristic of multimedia integration is more and more higher to the communication network requirement, be mainly reflected in big capacity, at a high speed, aspect such as protocol transparent, high reliability and operational administrative be simple.Because popularizing of the influence of these factors and telecommunication service, the particularly fast development of technique of internet impels optical communication technique to become the focus that current research is used.All-Optical Communication Network is considered to solve the unique channel of bandwidth and capacity problem.Because current techniques and economic aspect will realize that All-Optical Communication Network is temporary transient also infeasible completely.Synchronous digital hierarchy (Synchronous Digital Hierarchy, abbreviation " SDH "), PDH (Pseudo-synchronous Digital Hierarchy) (pseudosynchronous Digital Hierarchy, be called for short " PDH ") though adopt optical fiber as delivering path, the actual bandwidth utilance of optical fiber is very low.Time division multiplexing (Time DivisionMultiplexer, be called for short " TDM ") be though technology can improve the bandwidth of an optical fiber utilance to a certain extent, problem such as chromatic dispersion can occur when frequency is higher, crosstalk and can not using in broad frequency range.In order in broad frequency range, to make full use of the fiber bandwidth resource, increase the transmission capacity, according to the frequency division multiplexing principle of the signal of telecommunication wavelength-division multiplex technique (Wavelength Division Multiplexer is called for short " WDM ") has been proposed.
WDM technology is to transmit a technology of a plurality of different wave length light signals in an optical fiber simultaneously.Its basic principle is at transmitting terminal that wavelength optical signals is multiplexing, and be coupled in the same optical fiber on the lightguide cable link and transmit, to make up the multiplexed optical signals demultiplexing again at receiving terminal, after further handling, recover the signal that light carried of each wavelength and send into different terminals.
Wdm system is mainly by the optical sender of making a start, the optical wavelength multiplexing device, and the Er-doped fiber power amplifier, optical fiber, light preamplifier, optical wavelength demodulation multiplexer six parts are formed.Wherein optical sender is used to send the light signal that difference and precision and stability meet certain requirements, the optical wavelength multiplexing device is multiplexing with wavelength optical signals, the Er-doped fiber power amplifier is used to remedy the power loss that multiplexer causes and improves the power that light signal enters optical fiber, light preamplifier is used to improve receiving sensitivity, prolongs the optical signal transmission distance, and optical wavelength demodulation multiplexer demultiplexing goes out each original road light signal.
Actual wdm system need carry certain business, the reference model of its service node comprises image intensifer (Optical Amplifier, abbreviation " OA "), optical wavelength conversion element (Optical TransformUnit, be called for short " OTU "), optical add/drop multiplexer (Optical Add/Drop Multiplexer is called for short " OADM ").Wherein OA is mainly used to the loss of compensated wave division multiplexing device.Except straight-through optical wavelength is amplified, ripple passage is up and down amplified equally.OTU is converted into the standard wave length with off-gauge wavelength, so that exchange and transmission in whole net, when signal degradation, carry out regeneration function, can also from signal, extract simultaneously digital expense and processing, and can multiplexing multiple business, as SDH, asynchronous transfer mode (Asynchronous Transfer Mode is called for short " ATM "), Fast Ethernet (Fast Ethernet, abbreviation " FE "), gigabit Ethernet data services such as (Gigabytes Ethernet are called for short " GE ").In the WDM looped network, usually adopt OTU to realize interconnection and interflow with client device.OADM is a programmable equipment, its function is to download selectively to lead to local light signal from transmission equipment, upload the light signal that the local user is mail to another node users simultaneously, and do not influence the transmission of other wavelength channels, that is to say that OADM has realized the electric add-drop multiplexer function in traditional SDH equipment in the light territory.
Except the transmission capacity and transmission speed of signal, a very important standard is the reliability of network in communication network.For internet security and the traffic restoration capability that improves wdm system, need protect optical channel.Optical Channel Protection mainly can be divided into two types, and a kind of is the specialized type Optical Channel Protection, and a kind of is to share the formula Optical Channel Protection.The specialized type Optical Channel Protection; as unidirectional Optical Channel Protection; O-SNCP etc.; usually adopt the 1+1 protection pattern of concurrent choosing receipts; for two optical fiber of making a start send same light signal; which root optical fiber received signal receiving terminal is selected from by judgement, and this mode implements fairly simple, is mainly used in the business of convergent type.Share the formula Optical Channel Protection, as the protection of bi-directional light Line sharing, two-way light-channel shared protection etc., what adopt usually is 1: 1 protected mode, and an optical fiber is as the main channel, and an optical fiber is as alternate channel.The signal that transmits in two passages just often can be different, for example: can the higher service signal of transmission priority in the main channel, can transmit the service signal of low priority in the alternate channel.When break down in the main channel, then automatically switch to alternate channel, stop to transmit the original business of alternate channel then the business of transmission main channel.This protected mode is mainly used in the service distribution pattern of even type.In metropolitan area network,, adopt usually and share the formula Optical Channel Protection because terminal use's agreement is various and professional multi-level.Along with the expansion of the scope of business, share the trend that the formula Optical Channel Protection becomes the Optical Channel Protection development.
Realizing sharing the formula Optical Channel Protection at present mainly is that the special-purpose electric cross board that adds optical cross-matrix or separation in wdm system is realized defencive function.
In actual applications, there is following problem in such scheme: if adopt optical cross-matrix, it costs an arm and a leg and protects switching performance relatively poor; If adopt the special-purpose electric cross board that separates, though its cost is lower, speed is restricted, and can't realize Optical Channel Protection in broadband.
Cause the main cause of this situation to be, the Automatic Protection Switching of optical cross-matrix (AutomaticProtection Switch, be called for short " APS) agreement is complicated, handles slower, the design costliness.Special-purpose electric cross board is because high-speed electrical signals need transmit on backboard, and this moment, backboard speed often became the bottleneck of restricting signal speed.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of many light mouth optical wavelength conversion element, makes to realize sharing Optical Channel Protection in simple economy ground, improves the protection switching performance.
For achieving the above object, the invention provides a kind of many light mouth optical wavelength conversion element, comprise
First, second transceiver module is used to receive from the light signal of Wave division multiplexing side and is converted to the signal of telecommunication, and is light signal with the electrical signal conversion that needs send to the Wave division multiplexing side;
Three, the 4th transceiver module is used to receive from the light signal of client's side and is converted to the signal of telecommunication, and is light signal with the electrical signal conversion that needs send to client's side;
First monitors processing module, is used for the signal from described first, second transceiver module is carried out that service feature detects and the extraction and the insertion of alarm signal processing, Automatic Protection Switching information;
Second monitors processing module, is used for the signal from described the 3rd, the 4th transceiver module is carried out extraction and the insertion that service feature detects and alarm transmits processing, Automatic Protection Switching information;
Cross module is used for realizing that according to monitoring the Automatic Protection Switching information of processing module from described first, second intersection of each service channel between described four transceiver modules is switched.
Wherein, also comprise the 3R control module, be used for to the signal of described four transceiver modules regenerate, when resetting and reformation shape.
Also comprise service integration/demultiplexing module, being connected described Cross module and described second monitors between the processing module, be used to realize the multiplexing and demultiplexing of a plurality of service bearer wavelength, described service integration/demultiplexing module can be statistic multiplexing/demultiplexing module or transparent multiplexing/demultiplexing module.
Described first, second transceiver module can use wavelength identical or inequality.
Described first and second monitor that processing module can realize with integrated or discrete mode.
Described Cross module is electric Cross module.
Described electric Cross module is 4 * 4 or more electric Cross module.
Described third and fourth transceiver module can be unequal in the number of services of client's side.
Described Automatic Protection Switching signal inserts on the Wave division multiplexing frame, transmits, reads.
Also comprise communication control module, be used to control the action of described Cross module.
By relatively finding; technical scheme difference with the prior art of the present invention is; electric Cross module with at least 4 * 4 in an OTU connects two WDM side Transmit-Receive Units and two client's side Transmit-Receive Units; by innerly insert at this OTU, the fetch protection turning protocol; the connection of control Cross module realizes light-channel shared protection.
Difference on this technical scheme has brought comparatively significantly beneficial effect, promptly because electric Cross module rather than optical cross-matrix have been used in OUT inside, and the cost of electric Cross module is lower, and therefore can economic realization Optical Channel Protection; And, protection switching performance and reliability have been improved owing to being transmitted in OTU itself and just can realizing need not therefore can not being subjected to the restriction of backboard of changeover signal to speed through special supervision passage or backboard; Owing in the OTU that is distributing is changed the mechanism in protection, realize, need not the control of the whole network agreement, therefore can effectively avoid can't realizing that because of main frame is busy the situation of changing takes place.
Description of drawings
Fig. 1 has transparent multiplexing function many light mouth OTU functional block diagram of (TransparentMultiplexer is called for short " TMUX ") according to an embodiment of the invention;
Fig. 2 is the many light mouth OTU functional block diagram that does not have the TMUX function according to an embodiment of the invention;
Fig. 3 is a network application schematic diagram according to an embodiment of the invention;
Fig. 4 is a network application schematic diagram in accordance with another embodiment of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Shown in Figure 1 is the many light mouth OTU functional block diagram that has TMUX according to an embodiment of the invention, as shown in the figure.This functional module mainly is made up of following several sections: communication control module 10, WDM side transceiver module 11,12,3R control module 13, the WDM side monitors processing module 14, Cross module 15, service integration/demultiplexing module 16, client's side monitors processing module 17, client's side transceiver module 18,19.
Wherein, the function of communication control module 10 is to guarantee to control the protection switch function normally to realize.
WDM side transceiver module 11,12 is mainly finished the photosignal conversion (Electrical/Optical Transform is called for short " E/O ") and the electro-optical signal conversion (Optical/ElectricalTransform is called for short " O/E ") of WDM side.Those of ordinary skill in the art should be understood that WDM side transceiver module generally be taken as 2 and do not get a plurality of, if will cause too much system reliability can reduction; If not paired, when all main channels disconnect simultaneously, alternate channel can't be selected claimed main channel.In addition, the wavelength of WDM side transceiver module 11 and WDM side transceiver module 12 can be the same or different, and each wavelength all has corresponding transmitting-receiving port.
3R control module 13 is a series of measures of taking for the output signal that guarantees every connection can arrive next node, elimination pulse distortion and clock distortion.3R is regeneration (Regenerate), (Retiming) and reformation shape (Reshaping) when resetting.This module can not used.3R control module 13 and WDM side transceiver module 11,12, client's side transceiver module 18,19 connects, and the service of 3R is provided for these modules.
The WDM side monitors that processing module 14 can be integrated, also can be discrete.Main responsible performance of services detects and the alarm transmission is handled, the extraction of APS information and insertion etc., and can finish protection by the auxiliary Cross module 15 of the information of WDM side acquisition and switch.Wherein APS information can be placed on the WDM side and transmits and need not special supervision passage, so the frame of WDM side should have APS and inserts and abstraction function.The concrete load mode of APS information is relevant with frame format, can be DCC byte, APS byte, the self-defined byte of WDM side, or even sub-carrier modulation etc.
Cross module 15 is mainly used in the intersection switch function of realizing service channel.The electricity consumption Cross module is realized.Because the connectivity capabilities of client's side transceiver module 18 with client's side transceiver module 19, WDM side transceiver module 11 and WDM side transceiver module 12, client's side transceiver module 18 and WDM side transceiver module 11, client's side transceiver module 19 and WDM side transceiver module 12 need be provided, in the present embodiment, adopt 4 * 4 electric Cross module and the electric Cross module that can not use 22 * 2 realizes intersecting switch function.
Service integration/demultiplexing module 16 main multiplexing and demultiplexings of realizing a plurality of service bearer wavelength in order to improve the utilance of fiber bandwidth, increase the transmission capacity.When sending, use multiplexing function, when receiving, use the demultiplexing function.If express traffic can not used this module, if client's side business is short grained, multiplex/demultiplex herein.Those of ordinary skill in the art should be understood that this module can be statistic multiplexing/demultiplexing module, transparent multiplexing/demultiplexing module etc.Also can not use this module, the OTU functional block diagram that does not have the TMUX function according to an embodiment of the invention that Fig. 2 shows.
Client's side monitors that processing module 17 can be integrated or discrete equally.Mainly finish client's side business Performance Detection and alarm transmission processing, functions such as the extraction of APS information and insertion.Those of ordinary skill in the art should be understood that client's side line road generally do not go wrong, and do not use in order to save cost auxiliaryly to finish the protection switch function, can add in principle certainly.
Client's side transceiver module 18,19 is mainly finished the E/O and the O/E conversion of client's side.For the purpose of practicality, be taken as 2 usually.The number of services of client's side transceiver module 18 and client's side transceiver module 19 can be not reciprocity.For example: client's side transceiver module 18 can have 1～N business, and client's side transceiver module 19 can have 1～M business, and each business also all has corresponding transmitting-receiving port.When not having service integration/demultiplexing module 16, two client's sides can have only a business, and this moment, this OTU was exactly a direct transparent wavelength modular converter.
The composition of the many light mouth OTU module that has the TMUX function according to an embodiment of the invention and the function of various piece have above been described; below in conjunction with network application schematic diagram according to an embodiment of the invention the detailed process of using this OTU module to realize the protection conversion is described briefly, as shown in Figure 3.This application schematic diagram is the network of one 2 fine 4 service nodes, and 30,31,32,33 of service nodes are connected by optical fiber.Operating path 1 is for connecting the path of service node 30,32 through service node 31; Operating path 2 is for connecting the path of service node 30,32 through service node 33.
Client's side transceiver module 18 of supposing service node 30 has two GE business, and client's side transceiver module 19 also has two GE business.That the WDM side is multiplexing is the SDH of 2.5GHz.
Under the normal condition, the business of client's side transceiver module 18 is through after service integration/demultiplexing module 16, directly, monitor that in the WDM side processing module 14 places stamp the normal condition sign to frame, send to operating path 1 through WDM side transceiver module 11 by Cross module 15; The business of same client's side transceiver module 19 sends to operating path 2 through identical processing through WDM side transceiver module 12; The signal that WDM side transceiver module 11 only receives from operating path 1 during reception, signal extracts switch messages through monitoring processing module 14, owing to be normal condition, signal directly need not to switch by Cross module 15, finally arrives to be divided into two-way GE signal after the multiplex/demultiplex module 16 and to send to client's side transceiver module 18.The signal of operating path 2 is also given client's side transceiver module 19 through similarity haircut.Since use same wavelength can be between two websites transparent transmission 4 road GE signals, compare with traditional dedicated optical path protection, the transmission capacity can improve 1 times at least.
Might as well suppose on the operating path 1 that what transmit is the business of high priority, as banking etc., and what transmit on the operating path 2 is the business of low priority, as the individual Internet Access business.When the fiber break of operating path 1 or the Signal Degrade of transmission (Signal Degrade, abbreviation " SD "), need to start protection and change the mechanism.
At first the WDM side by service node 30,32 monitors that the signal of 14 pairs of receptions of processing module detects, and switches mark if find SD signal or protection, triggers local communication control module 10, and the action of Switching Module 15 is controlled, and realizes the protection conversion.Can cut off the business of client's side transceiver module 19 this moment fully, allow the professional occupied bandwidth fully of client's side transceiver module 18, meanwhile WDM side transceiver module 12 transmission APS agreements or the mark by service node 30,32 makes the receiving end of the WDM side transceiver module 12 of service node 30,32 receive switch messages, finish affirmation, thereby business is transformed into continuation transmission on the operating path 2.Business that also can incomplete cut-off client side transceiver module 19 when protection is switched, and the compound again follow-up supervention of the business of client's side transceiver module 18,19 is given, bandwidth is decreased, but can guarantee that all business can both continue to transmit.
In another preferred embodiment of the present invention, in order further to improve the wavelength utilance, service node 33 at Fig. 3 also can be placed an OTU of the present invention, as shown in Figure 4, because the interruption or the SD information of operating path 1 can't directly obtain, so the state of the Switching Module 15 of service node 33 need be determined according to APS agreement or mark that service node 30,32 sends over.The WDM side transceiver module 11 and the WDM side transceiver module 12 of service node 33 are communicated with, thereby APS agreement or mark are transmitted along the path of A-C-B.Certainly also can between A-C-B, can open the service node that more has OTU of the present invention, realize the protection conversion in the whole network.
More than explanation all is that the protection of WDM side is changed the mechanism, and the conversion if client's side also needs protection can be by identical method realization, and the interface that just requires client's side is consistent.Because this protection translation function is independently to be realized by the OTU module that is distributed in everywhere, need not the control of the whole network agreement in addition, therefore can connect two different networks, form subnet.
Though by reference some preferred embodiment of the present invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that, can do various changes to it in the form and details, and the spirit and scope of the present invention that do not depart from appended claims and limited.
Claims (10)
1. the optical wavelength conversion element of light mouth more than a kind is characterized in that, comprises
First, second transceiver module is used to receive from the light signal of Wave division multiplexing side and is converted to the signal of telecommunication, and is light signal with the electrical signal conversion that needs send to the Wave division multiplexing side;
Three, the 4th transceiver module is used to receive from the light signal of client's side and is converted to the signal of telecommunication, and is light signal with the electrical signal conversion that needs send to client's side;
First monitors processing module, is used for the signal from described first, second transceiver module is carried out that service feature detects and the extraction and the insertion of alarm signal processing, Automatic Protection Switching information;
Second monitors processing module, is used for the signal from described the 3rd, the 4th transceiver module is carried out extraction and the insertion that service feature detects and alarm transmits processing, Automatic Protection Switching information;
Cross module is used for realizing that according to monitoring the Automatic Protection Switching information of processing module from described first, second intersection of each service channel between described four transceiver modules is switched.
2. many light mouth optical wavelength conversion element according to claim 1 is characterized in that, also comprises the 3R control module, be used for to the signal of described four transceiver modules regenerate, when resetting and reformation shape.
3. many light mouth optical wavelength conversion element according to claim 1, it is characterized in that, also comprise service integration/demultiplexing module, being connected described Cross module and described second monitors between the processing module, be used to realize the multiplexing and demultiplexing of a plurality of service bearer wavelength, described service integration/demultiplexing module can be statistic multiplexing/demultiplexing module or transparent multiplexing/demultiplexing module.
4. many light mouth optical wavelength conversion element according to claim 1 is characterized in that described first, second transceiver module can use wavelength identical or inequality.
5. many light mouth optical wavelength conversion element according to claim 1 is characterized in that, described first and second monitor that processing module can realize with integrated or discrete mode.
6. many light mouth optical wavelength conversion element according to claim 1 is characterized in that described Cross module is electric Cross module.
7. many light mouth optical wavelength conversion element according to claim 6 is characterized in that, described electric Cross module is 4 * 4 or more electric Cross module.
8. many light mouth optical wavelength conversion element according to claim 1 is characterized in that described third and fourth transceiver module can be unequal in the number of services of client's side.
9. many light mouth optical wavelength conversion element according to claim 1 is characterized in that described Automatic Protection Switching signal inserts, transmits, reads on the Wave division multiplexing frame.
10. according to any described many light mouth optical wavelength conversion element in the claim 1 to 9, it is characterized in that, also comprise communication control module, be used to control the action of described Cross module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100398833A CN100502258C (en) | 2004-03-23 | 2004-03-23 | Multi-optical port optical wavelength converting unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100398833A CN100502258C (en) | 2004-03-23 | 2004-03-23 | Multi-optical port optical wavelength converting unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1674469A true CN1674469A (en) | 2005-09-28 |
| CN100502258C CN100502258C (en) | 2009-06-17 |
Family
ID=35046770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100398833A Expired - Lifetime CN100502258C (en) | 2004-03-23 | 2004-03-23 | Multi-optical port optical wavelength converting unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100502258C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010020174A1 (en) * | 2008-08-21 | 2010-02-25 | 中兴通讯股份有限公司 | Protection method and system with shared sub-wavelength path implemented by electric-cross mode |
| CN101826917A (en) * | 2010-04-21 | 2010-09-08 | 瑞斯康达科技发展股份有限公司 | Optical line protection device and system |
| WO2011026324A1 (en) * | 2009-09-02 | 2011-03-10 | 中兴通讯股份有限公司 | Distributed electrical cross device, and system and method thereof for implementing sub-network connection (snc) cascade protection |
| CN101741703B (en) * | 2008-11-25 | 2012-01-25 | 华为技术有限公司 | Method and system for realizing multi-service transmitting network transmission channel |
-
2004
- 2004-03-23 CN CNB2004100398833A patent/CN100502258C/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010020174A1 (en) * | 2008-08-21 | 2010-02-25 | 中兴通讯股份有限公司 | Protection method and system with shared sub-wavelength path implemented by electric-cross mode |
| CN101741703B (en) * | 2008-11-25 | 2012-01-25 | 华为技术有限公司 | Method and system for realizing multi-service transmitting network transmission channel |
| WO2011026324A1 (en) * | 2009-09-02 | 2011-03-10 | 中兴通讯股份有限公司 | Distributed electrical cross device, and system and method thereof for implementing sub-network connection (snc) cascade protection |
| US9276690B2 (en) | 2009-09-02 | 2016-03-01 | Zte Corporation | Distributed electrical cross device, and system and method thereof for implementing sub-network connection (SNC) cascade protection |
| CN101826917A (en) * | 2010-04-21 | 2010-09-08 | 瑞斯康达科技发展股份有限公司 | Optical line protection device and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100502258C (en) | 2009-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6452945B1 (en) | Electrical add-drop multiplexing for optical communications networks utilizing frequency division multiplexing | |
| US8639116B2 (en) | Digital subcarrier optical network utilizing digital subcarrier cross-connects with increased energy efficiency | |
| US9031406B2 (en) | Digital subcarrier cross-connect switching | |
| EP0491495A1 (en) | Optical packet field coding | |
| EP1241913A1 (en) | Optical packet node and optical packet add drop multiplexer | |
| CN1245604A (en) | Inter-ring cross-connect for survivable multi-wavelength optical communication networks | |
| CN100420309C (en) | Large volume optical route device utilizing electrical buffer | |
| CN1352841A (en) | Optical communications network | |
| US7280758B2 (en) | Optical multi-ring network for burst data communication | |
| CN109560891A (en) | Realize the method and device of wavelength-division-multiplexed optical signal branch | |
| CN1435070A (en) | Four-fiber ring optical cross-connect system using 4*4 switch matrices | |
| CN102550042B (en) | Optical packet switching device | |
| US20060062246A1 (en) | Multi-service transport apparatus for integrated transport networks | |
| EP1237309B1 (en) | Fiber optic communication system | |
| CN100502258C (en) | Multi-optical port optical wavelength converting unit | |
| US20020089715A1 (en) | Fiber optic communication method | |
| US6643042B1 (en) | Optical communication network node | |
| US20020186430A1 (en) | Communications network | |
| US20020080442A1 (en) | Optical cross-connect for optional interconnection of communication signals of different multiplex levels | |
| CN102907025A (en) | Method, system, and apparatus for transmitting data information by using optical signals | |
| CN201846454U (en) | Multi-granularity optical cross connection device for optical burst switching network core node | |
| CN1203638C (en) | Dynamic multiple wavelength grouping ring transmission system | |
| US20020080441A1 (en) | Optical cross-connect for optional interconnection of communication signals of different multiplex levels | |
| CN104365114A (en) | Apparatus and method for switching information transported using a hierarchical data structure | |
| Mukherjee | Optical‐Electrical‐Optical (O‐E‐O) Switches |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090617 |
|
| CX01 | Expiry of patent term |