CN101834667A - Service protection method in optical network and source station device - Google Patents
Service protection method in optical network and source station device Download PDFInfo
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- CN101834667A CN101834667A CN201010173607A CN201010173607A CN101834667A CN 101834667 A CN101834667 A CN 101834667A CN 201010173607 A CN201010173607 A CN 201010173607A CN 201010173607 A CN201010173607 A CN 201010173607A CN 101834667 A CN101834667 A CN 101834667A
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Abstract
The invention discloses a service protection method in an optical network and a source station device, wherein the method comprises the following steps: dispatching service of a first service veneer to a second service veneer of a source station when a fault occurs in an optical fiber path from the first service veneer of the source station to a target station; and transmitting the service through the optical fiber path from the second service veneer to the target station. The method and the device do not need to additionally increase an optical fiber and an optical switch, and can realize large-capacity, flexible and high-efficient service protection.
Description
Technical field
The present invention relates to the communications field, service protecting method and source station device in a kind of optical-fiber network.
Background technology
In recent years, the data service development is very fast, and particularly the development of broadband, IPTV (InternetProtocol Television, Web TV), video traffic has proposed new requirement to the Backbone Transport Network network.On the one hand; require the Backbone Transport Network network can provide the magnanimity bandwidth to adapt to traffic growth; on the other hand, require the oarse-grained Backbone Transport Network network of big capacity must possess high survivability and high reliability, therefore provide a kind of flexible and efficient optical network protecting method to be very important.
The optical network protecting method of correlation technique is optical switch, main fiber to be set on each service board and to be equipped with optical fiber.When main fiber breaks down, can use optical switch that the business of main fiber is switched to optical fiber fully, perhaps, when optical fiber broke down fully, the business that can use optical switch will be equipped with optical fiber switched to main fiber.
The inventor finds that this scheme causes having only a transport service in the active and standby optical fiber of synchronization, and another is idle, has caused certain line resource waste; And more each service board need be provided with optical switch and be equipped with optical fiber in order to protect switching, cause the quantity of optical fiber and optical switch more, makes that the volume of wave-division device is bigger, and has increased cost.
Summary of the invention
Main purpose of the present invention is to provide service protecting method and the source station device in a kind of optical-fiber network, to address the above problem at least.
According to an aspect of the present invention, provide the service protecting method in a kind of optical-fiber network, having comprised: first service board of Source Site breaks down to the fiber path of targeted sites; The service dispatching of first service board is arrived second service board of this Source Site; And transmit this business to the fiber path of targeted sites by second service board.
According to a further aspect in the invention, provide the source station device in a kind of optical-fiber network, having comprised: first service board is used for by its fiber path transport service to targeted sites; Whether detection module is used to detect first service board and breaks down to the fiber path of targeted sites; Scheduler module is used for when detection module detects fault, with the service dispatching of first service board to second service board; Second service board is used for by its business to the fiber path transmitting and scheduling of targeted sites.
By the present invention; when the service transmission path of a certain service board A breaks down; with its service dispatching to other service boards (can be one or more service boards); be transferred to targeted sites by other service boards; thereby need not other oil (gas) filling device optical fiber and optical switch, realized big capacity, flexibly, service protection efficiently.In addition, other service boards that are dispatched to (as second service board) still can transmit the business of oneself, have made full use of existing line resource, have avoided using active/standby mode to carry out the waste of the line resource that service protection causes.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to service protecting method in the optical-fiber network of the embodiment of the invention;
Fig. 2 is the networking schematic diagram according to the optical-fiber network of the embodiment of the invention;
Fig. 3 is the schematic diagram according to the source station device in the optical-fiber network of the embodiment of the invention;
Fig. 4 is the schematic diagram of the source station device in the optical-fiber network according to the preferred embodiment of the invention;
Fig. 5 is that Frame shines upon/separates mapping and intersects schematic diagram according to the preferred embodiment of the invention; And
Fig. 6 is the schematic diagram of the source station device in the optical-fiber network according to the preferred embodiment of the invention.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
In optical-fiber network, mutual transport service between a plurality of websites of wave-division device (website of a wave-division device also is a network element, and a website generally is made up of one or more frames), the present invention realizes in above-mentioned optical-fiber network.
Fig. 1 is according to the flow chart of service protecting method in the optical-fiber network of the embodiment of the invention, may further comprise the steps:
Step S102, first service board of Source Site breaks down to the fiber path of targeted sites;
For example, as shown in Figure 2, with DWDM (Dense Wavelength DivisionMultiplexing, dense wave division multipurpose) system is an example, website A is as the Source Site, its certain professional targeted sites is website B, and website A transmits this business by its service board A (i.e. first service board) to the fiber path 1 (being the path of website A-website C-website B) of website B.Fault has appearred in this fiber path 1, such as: disconnected fine.
Step S104 is with the service dispatching of first service board second service board to this Source Site;
For example, the business with service board A is dispatched to an other service board B (i.e. second service board) in website A.
Step S106 is by the fiber path transport service of second service board to targeted sites.
For example, service board B has realized the service protection of optical-fiber network by its fiber path 2 (website A-website D-website B) to website B.
Correlation technique is optical switch, main fiber to be set on each service board and to be equipped with optical fiber, when breaking down, active and standby optical fiber uses optical switch directly to switch, and causes having only a transport service in the active and standby optical fiber of synchronization, has caused certain line resource waste; And more each service board need be provided with optical switch and be equipped with optical fiber in order to protect switching, cause the quantity of optical fiber and optical switch more, makes that the volume of wave-division device is bigger, and has increased cost.When present embodiment breaks down at the service transmission path of a certain service board A; with its service dispatching to other service boards (can be one or more service boards); be transferred to targeted sites by other service boards; thereby need not other oil (gas) filling device optical fiber and optical switch; realized big capacity, flexibly, service protection efficiently, solved the problems referred to above of correlation technique.In addition, other service boards that are dispatched to (as second service board) still can transmit the business of oneself, have made full use of existing line resource, have avoided using active/standby mode to carry out the waste of the line resource that service protection causes.
Preferably, before step S104, also comprise: in the routing information of Source Site, find the fiber path of second service board to targeted sites.As shown in Figure 2, to as after breaking down for the fiber path 1 of website B, at first need to find a new fiber path, for example find fiber path 2, the business of service board A is transferred to website B to use this new fiber path at service board A.Above-mentioned routing information can be for setting up and be kept at the routing table of Source Site in advance.Like this, by finding another piece service board B at the fiber path place that this new fiber path can know that this is new, the service dispatching of service board A to this service board B, is transferred to website B by service board B.
Preferably, business is ODU
n(Optical Channel Data Unit, optical channel data cell, n are that subscript is represented speed grade) Frame, step S104 comprises: with the ODU of first service board
nFrame is mapped as the intermediate data frame; The intermediate data frame scheduling that mapping is obtained is to second service board.Business datum in the dwdm system is ODU
n(OpticalChannel Data Unit, optical channel data cell) frame format is because business datum can be the ODU of different rates grade
nFrame is as ODU
0, ODU
1, ODU
2Deng, different ODU
nFrame has different frame formats, will have the ODU of different frame formats
0, ODU
1, ODU
2Be unified into a kind of intermediate data frame format Deng Frame, service dispatching arrived service board B, adopt the convenient professional cross scheduling of unified frame format thereby middle Frame is intersected.
Preferably, with the ODU of first service board
nThe mode that Frame is mapped as the intermediate data frame comprises: with per 4 ODU
0Frame or per 2 ODU
1Frame or each ODU
2Frame is mapped as an intermediate data frame; Perhaps, with per 8 ODU
0Frame or per 4 ODU
1Frame or per 2 ODU
2Frame is mapped as an intermediate data frame.
The preferred embodiment provides the ODU that will have different frame formats
0Frame, ODU
1Frame and ODU
2Frame is mapped to the specific embodiments of intermediate data frame.The form of intermediate data frame has particular requirement, for convenience ODU
nMapping, preferably and ODU
nSpeed become ratio.Such as: the intermediate data frame can be designed as about 4 ODU
0Speed, like this, 4 ODU
0Can be mapped to 1 intermediate data frame, 2 ODU
1Be mapped to 1 intermediate data frame, 1 ODU
2Be mapped to 2 intermediate data frames.By above-mentioned mapping relations as can be seen, ODU
nCan fully be mapped to the intermediate data frame, incomplete phenomenon can not occur using.Particularly, an intermediate data frame is divided into 4 time slots, with ODU
0When being mapped to the intermediate data frame, can be with first ODU
0Put into first time slot of an intermediate data frame, second, third and the 4th ODU
0Put into second, the 3rd and the 4th time slot of this intermediate data frame successively.Circulation according to this.Obviously, with ODU
nFrame is mapped as the mode of intermediate data frame can carry out flexibly.
Preferably, the intermediate data frame scheduling that mapping is obtained comprises to second service board: the intermediate data frame that mapping is obtained splits; The time slot that needs in the time slot that fractionation is obtained to be dispatched to same service board is reformulated the intermediate data frame; The intermediate data frame that needs to be dispatched to second service board in the intermediate data frame that combination is obtained is transferred to second service board.As shown in Figure 2, because the business of service board A may be transferred to website B by many new fiber paths that find, perhaps the business of service board A may comprise the multiple business that is transferred to the different target website, at this moment, the service board that service needed is dispatched to may be a plurality of (as service board B and service board C), like this, may comprise the ODU that need be dispatched to the different business veneer in the intermediate data frame that the business of service board A is mapped to
nFrame (each ODU in mapping process
nFrame has been mapped to the one or more time slots in the intermediate data frame), therefore, the intermediate data frame that needs elder generation that service board A mapping is obtained splits and obtains all time slots, and be remapped to the intermediate data frame, and transmit according to the time slot that the difference of the service board that will be dispatched to will be dispatched to same service board.Said process also can be called the intersection process.
For example, service board A ODU
1With two ODU
0To be crossed to service board B and service board C respectively.The ODU of service board A
1With two ODU
0Be mapped as an intermediate data frame, then, this intermediate data frame is taken apart according to the destination, ODU wherein
1Need be crossed to the ODU of service board B with other
nReassemble into a new intermediate data frame and be transferred to service board B, two ODU
0Also need be crossed to the ODU of service board C with other
nReassemble into a new intermediate data frame and be transferred to service board C.Service board B and service board C separate the business that mapping can obtain needs to the intermediate data frame that receives again.
Preferably, before step S106, also comprise: the intermediate data frame is separated mapping obtain ODU
nFrame; Then, step S106 comprises: with ODU
nFrame is transferred to targeted sites by second service board to the fiber path of targeted sites.As shown in Figure 2, owing to adopted unified intermediate data frame format, service board B the intermediate data frame that receives need be separated the ODU that mapping obtains needs
nFrame, thus by fiber path 2 business of service board A is sent to website B, thus realized protection to the business in the optical-fiber network.
Fig. 2 is the networking schematic diagram according to the optical-fiber network of the embodiment of the invention, and Fig. 3 is the schematic diagram according to the source station device in the optical-fiber network of the embodiment of the invention.
As shown in Figures 2 and 3, this source station device (being arranged in the website A of Fig. 2) comprising: first service board 10 (being the service board A of Fig. 2) is used for by its fiber path transport service to targeted sites B;
Whether detection module 20 is used to detect first service board 10 and breaks down to the fiber path 1 of targeted sites B;
Scheduler module 30 is used for when detection module 20 detects fault, with the service dispatching of first service board 10 to second service board 40;
Second service board 40 (being the service board B among Fig. 2) is used for by its business to fiber path 2 transmitting and schedulings of targeted sites B.
Fig. 4 is the schematic diagram of the source station device in the optical-fiber network according to the preferred embodiment of the invention.
Preferably, as shown in Figure 4, in above-mentioned device, also comprise: search module 50, be used for when detection module 20 detects fault, in the routing information of source station device, find the fiber path 2 of second service board 40 to targeted sites B.Like this, can know second service board 40 at these fiber path 2 places.
Preferably, as shown in Figure 4, when business is optical channel data module ODU
nDuring Frame, first service board 10 comprises: mapping block 102 is separated in first mapping, is used for the ODU with first service board 10
nFrame is mapped as the intermediate data frame;
Scheduler module 30 comprises: split module 302, be used for that the intermediate data frame that mapping block 102 mappings obtain is separated in first mapping and split; Recombination module 304 is used for splitting the time slot reformulation intermediate data frame that the time slot that obtains needs to be dispatched to same service board with splitting module 302; Transport module 306 is used for the intermediate data frame that the intermediate data frame that recombination module 304 combinations obtain needs to be dispatched to second service board 40 is transferred to second service board 40.
Fig. 5 is that Frame shines upon/separate mapping and intersection schematic diagram according to the preferred embodiment of the invention, is example with the dwdm system, supposes the ODU of service board A
1With two ODU
0Will be crossed to service board B and service board C respectively, the data handling procedure of the source station device of above preferred embodiment comprises: service board A separates map unit with an ODU by the mapping on it
1With two ODU
0Be mapped as an intermediate data frame, take ODU wherein apart according to the destination after this intermediate data frame has arrived scheduler module
1Need be crossed to the ODU of service board B with other
nReassemble into a new intermediate data frame and be transferred to service board B, two ODU
0Also need be crossed to the ODU of service board C with other
nReassemble into a new intermediate data frame and be transferred to service board C.Service board B and service board C separate the business that mapping can obtain needs to the intermediate data frame that receives again.
Preferably, second service board 40 comprises: mapping block 402 is separated in second mapping, is used for that the intermediate data frame that scheduler module 30 transmission come is separated mapping and obtains ODU
nFrame, and with this ODU
nFrame is transferred to targeted sites B by second service board 40 to the fiber path of targeted sites B.
Preferably, detection module 20, scheduler module 30 and search module 50 by FPGA (Field Programmable Gate Array, field programmable gate array) chip or ASIC (Application Specific Integrated Circuit, application-specific integrated circuit (ASIC)) chip is realized.Like this, in actual implementation process, can utilize fpga chip or asic chip to realize the function of above-mentioned module.
Because present most advanced and sophisticated FPGA has possessed transceiver (high speed serialization transmitting-receiving interface) interface at a high speed, the speed of supporting is up to 10G, can realize the transmitting-receiving of the intermediate data frame data of two-forty, and FPGA having jumbo logical block, is the effective tool of data processing.For the source station device of optical-fiber network, the cross-over configuration that changes protection at any time, flexibly, reliably is very important, and the dynamic recognition function of FPGA can realize this demand.
In addition, with high costs because the high speed transceiver interface of the most advanced FPGA of industry has only 40 if jumbo source station device then needs to use multiple FPGA, increase the complexity of PCB (printed circuit board (PCB)) making sheet.If the use asic chip, then can be on monolithic a large amount of integrated transceiver interfaces, that is to say that an asic chip can substitute several FPGA, significantly reduces the number of chips of use.
Obviously, above-mentioned source station device can be arranged on any one or a plurality of website of wave-division device, to realize the protection of the business in the optical-fiber network.
As shown in Figure 6, in the process that reality is implemented, above-mentioned detection module 20, scheduler module 30 and search module 50 can be by protection control ﹠amp; Scheduling unit realizes, first mapping separate mapping block 102 and second mapping separate mapping block 402 can be by intermediate data frame mapping ﹠amp; Separate map unit and realize, and connect protection control ﹠amp by backboard; Scheduling unit and intermediate data frame mapping ﹠amp; Separate map unit, wherein:
Protection control ﹠amp; Scheduling unit breaks down in case be used for detecting certain bar fiber path 1, then can find out new fiber path 2 and come transport service, and service dispatching to new fiber path 2;
Intermediate data frame mapping ﹠amp; Separate map unit, be positioned on the service board, each protected business all needs to be mapped to the intermediate data frame format, separates the ODU that mapping is reduced into standard again after being dispatched to target service veneer (being the service board at new fibre circuit 2 places)
nFrame;
Backboard, protection control ﹠amp; Scheduling unit and intermediate data frame mapping ﹠amp; Separate the connection tie of map unit, the intermediate data frame transmits between these two unit by backboard.
When the fibre circuit of the device of above preferred embodiment at certain professional place breaks down, protection control ﹠amp; Scheduling unit can calculate the fibre circuit that makes new advances at once, and the target service veneer that business will be dispatched to new fibre circuit place from the service board at faulty line place transmits again.Particularly, the business that is scheduled at first is mapped as a kind of intermediate data frame, is transferred to protection control ﹠amp by backboard; Scheduling unit, protection control ﹠amp; Scheduling unit is crossed to the interface of target service veneer correspondence to it, is transferred to the target service veneer by backboard, and the ODU of the standard of being mapped as separated the intermediate data frame by the target service veneer
nBe transferred to targeted sites by new fibre circuit again behind the Frame.
As can be seen from the above description, the present invention has realized following technique effect: disobey outer plant equipment and the optics of adding, just can realize big capacity, flexibly, service protection efficiently, reduced cost, avoided the utilance of line resource.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the service protecting method in the optical-fiber network is characterized in that, comprising:
First service board of Source Site breaks down to the fiber path of targeted sites;
The service dispatching of described first service board is arrived second service board of described Source Site; And
Transmit described business by described second service board to the fiber path of described targeted sites.
2. method according to claim 1 is characterized in that, before the service dispatching with described first service board arrives second service board of described Source Site, also comprises:
In the routing information of described Source Site, find the fiber path of described second service board to described targeted sites.
3. method according to claim 1 is characterized in that, described business is optical channel data cell ODU
nFrame comprises the service dispatching of described first service board second service board to described Source Site:
ODU with described first service board
nFrame is mapped as the intermediate data frame;
The described intermediate data frame scheduling that mapping is obtained arrives described second service board.
4. method according to claim 3 is characterized in that, with the ODU of described first service board
nThe mode that Frame is mapped as the intermediate data frame comprises:
With per 4 ODU
0Frame or per 2 ODU
1Frame or each ODU
2Frame is mapped as a described intermediate data frame; Perhaps,
With per 8 ODU
0Frame or per 4 ODU
1Frame or per 2 ODU
2Frame is mapped as a described intermediate data frame.
5. method according to claim 3 is characterized in that, the described intermediate data frame scheduling that mapping is obtained comprises to described second service board:
The described intermediate data frame that mapping is obtained splits;
The time slot that needs in the time slot that fractionation is obtained to be dispatched to same service board is reformulated the intermediate data frame;
The intermediate data frame that needs to be dispatched to described second service board in the intermediate data frame that combination is obtained is transferred to described second service board.
6. according to each described method in the claim 3 to 5, it is characterized in that,
Before transmitting described business to the fiber path of described targeted sites, also comprise: described intermediate data frame is separated mapping obtain described ODU by described second service board
nFrame;
Transmitting described business by described second service board to the fiber path of described targeted sites comprises: with described ODU
nFrame is transferred to described targeted sites by described second service board to the fiber path of described targeted sites.
7. the source station device in the optical-fiber network is characterized in that, comprising:
First service board is used for by its fiber path transport service to targeted sites;
Whether detection module is used to detect described first service board and breaks down to the fiber path of described targeted sites;
Scheduler module is used for when described detection module detects fault, with the service dispatching of described first service board to second service board;
Described second service board is used for transmitting by its fiber path to described targeted sites the business of described scheduling.
8. device according to claim 7, it is characterized in that, also comprise: search module, be used for when described detection module detects fault, in the routing information of described source station device, find the fiber path of described second service board to described targeted sites.
9. device according to claim 7 is characterized in that, described business is optical channel data module ODU
nFrame,
Described first service board comprises: mapping block is separated in first mapping, is used for the ODU with described first service board
nFrame is mapped as the intermediate data frame;
Described scheduler module comprises: split module, be used for that the described intermediate data frame that the mapping block mapping obtains is separated in described first mapping and split; Recombination module is used for described fractionation module is split the time slot reformulation intermediate data frame that the time slot that obtains needs to be dispatched to same service board; Transport module is used for the intermediate data frame that the intermediate data frame that described recombination module combination obtains needs to be dispatched to described second service board is transferred to described second service board.
10. device according to claim 9 is characterized in that, described second service board comprises: mapping block is separated in second mapping, is used for that the described intermediate data frame that described scheduler module transmission comes is separated mapping and obtains described ODU
nFrame, and with described ODU
nFrame is transferred to described targeted sites by described second service board to the fiber path of described targeted sites.
11. device according to claim 8 is characterized in that, described detection module, described scheduler module and the described module of searching are realized by on-site programmable gate array FPGA chip or application-specific integrated circuit ASIC chip.
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| CN201010173607.1A CN101834667B (en) | 2010-05-07 | 2010-05-07 | Service protection method in optical network and source station device |
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|---|---|---|---|
| CN201010173607.1A CN101834667B (en) | 2010-05-07 | 2010-05-07 | Service protection method in optical network and source station device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104601216A (en) * | 2014-12-04 | 2015-05-06 | 大唐移动通信设备有限公司 | Communication device protection device |
| CN110708254A (en) * | 2018-07-09 | 2020-01-17 | 华为技术有限公司 | Service processing method, control equipment and storage medium |
| WO2023273393A1 (en) * | 2021-06-28 | 2023-01-05 | 华为技术有限公司 | Optical cross-connect device and wavelength selective switch |
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| CN1633119A (en) * | 2003-12-24 | 2005-06-29 | 华为技术有限公司 | Packet service scheduling unit and packet service scheduling method |
| CN1972213A (en) * | 2006-11-27 | 2007-05-30 | 华为技术有限公司 | An Ethernet protection method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1633119A (en) * | 2003-12-24 | 2005-06-29 | 华为技术有限公司 | Packet service scheduling unit and packet service scheduling method |
| CN1972213A (en) * | 2006-11-27 | 2007-05-30 | 华为技术有限公司 | An Ethernet protection method and apparatus |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104601216A (en) * | 2014-12-04 | 2015-05-06 | 大唐移动通信设备有限公司 | Communication device protection device |
| CN104601216B (en) * | 2014-12-04 | 2017-06-16 | 大唐移动通信设备有限公司 | A kind of communication equipment protection device |
| CN110708254A (en) * | 2018-07-09 | 2020-01-17 | 华为技术有限公司 | Service processing method, control equipment and storage medium |
| US11664890B2 (en) | 2018-07-09 | 2023-05-30 | Huawei Technologies Co., Ltd. | Service processing method, control device, and storage medium |
| WO2023273393A1 (en) * | 2021-06-28 | 2023-01-05 | 华为技术有限公司 | Optical cross-connect device and wavelength selective switch |
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| Publication number | Publication date |
|---|---|
| CN101834667B (en) | 2014-12-10 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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