WO2010057425A1 - 一种光交换的方法和装置 - Google Patents
一种光交换的方法和装置 Download PDFInfo
- Publication number
- WO2010057425A1 WO2010057425A1 PCT/CN2009/074979 CN2009074979W WO2010057425A1 WO 2010057425 A1 WO2010057425 A1 WO 2010057425A1 CN 2009074979 W CN2009074979 W CN 2009074979W WO 2010057425 A1 WO2010057425 A1 WO 2010057425A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical
- unit
- input
- switching unit
- switching
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 267
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000000835 fiber Substances 0.000 claims description 67
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000013307 optical fiber Substances 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 108010001267 Protein Subunits Proteins 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 235000019580 granularity Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 208000010119 wrinkly skin syndrome Diseases 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
- H04J14/0213—Groups of channels or wave bands arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0215—Architecture aspects
- H04J14/0217—Multi-degree architectures, e.g. having a connection degree greater than two
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
- H04Q2011/0007—Construction
- H04Q2011/0016—Construction using wavelength multiplexing or demultiplexing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
- H04Q2011/0007—Construction
- H04Q2011/0024—Construction using space switching
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
- H04Q2011/0052—Interconnection of switches
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0075—Wavelength grouping or hierarchical aspects
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for optical switching.
- the existing Dense wavelength division multiplexing (DWDM) technology can accommodate hundreds of wavelengths in one fiber, and each wavelength can reach a transmission rate of 40 Gbit/s or even 100 Gbit/s.
- the capacity can reach the Tbit/s level and above, and can meet the network bandwidth requirements.
- dense wavelength division multiplexing technology has brought about a significant increase in network cost and control complexity. Since the number of wavelengths accommodated in the optical fiber is hundreds, the number of optical switching and wavelength switching ports in the optical cross-connect (OXC) is greatly increased, and the cost of optical switching is also greatly increased; meanwhile, OXC The larger the scale, the more difficult and complicated the control of OXC.
- Multi-granular optical switching technology refers to the simultaneous optical fiber in the same optical node. Switching, band switching and wavelength switching.
- the band exchange refers to a plurality of wavelengths forming a band, which can be exchanged as a unit, which can reduce the number of ports required for switching, thereby reducing the cost; at the same time, providing three types of switching granularity of optical fiber, band, and wavelength, which can be flexibly Adjusted according to business needs, reducing control complexity.
- a technical problem to be solved by embodiments of the present invention is to provide a method and apparatus for optical switching, which saves a switching port.
- the input light waves When the input light waves need to be grouped, the input light waves are exchanged to the optical grouping unit; and then the grouped light waves are received;
- the grouped light waves are switched to the corresponding output port outputs.
- Another embodiment of the present invention provides a method for optical switching, including:
- the grouped light waves are transmitted to the optical switching device.
- the embodiment of the invention further provides an optical switching device, including:
- An optical switching unit and an optical grouping unit wherein a part of the output port of the optical switching unit is connected to an input port of the optical grouping unit, and an output port of the optical grouping unit is connected to an input port of the optical switching unit;
- the optical switching unit is configured to control a transmission path of the optical wave;
- the optical grouping unit is configured to use the optical packet.
- the above technical solution has the following beneficial effects: in the scheme of optical switching by optical packet unit and optical switching unit switching, the combination of light according to requirements can reduce the requirement of the switch matrix, thereby saving the optical switching unit port.
- FIG. 1 is a schematic structural view of a device according to an embodiment of the present invention.
- FIG. 2a is a schematic structural diagram of an optical switching unit according to an embodiment of the present invention.
- FIG. 2b is a schematic structural diagram of an optical switching unit according to an embodiment of the present invention.
- 2c is a schematic structural diagram of an optical grouping unit according to an embodiment of the present invention.
- FIG. 3a is a schematic structural view of a device according to Embodiment 2 of the present invention.
- FIG. 3b is a schematic structural diagram of another apparatus according to Embodiment 2 of the present invention.
- 3c is a schematic structural view of another device according to Embodiment 2 of the present invention.
- FIG. 4a is a schematic structural view of a device according to a third embodiment of the present invention.
- FIG. 4b is a schematic structural diagram of another apparatus according to Embodiment 3 of the present invention.
- FIG. 5 is a schematic structural diagram of a device according to Embodiment 4 of the present invention.
- a technical problem to be solved by embodiments of the present invention is to provide a method and apparatus for optical switching, which saves a switching port.
- the input light wave is exchanged to the optical packet unit, and then the grouped light wave is received; and the grouped light wave is exchanged to the corresponding output port output.
- the method further includes: when the optical wave exchanged by the optical switching unit needs to exchange services, transmitting the input optical wave to the service switching unit, and then receiving the optical wave after the service switching; and exchanging the optical wave after the service switching to the corresponding output port. Output.
- the executor of the above solution may be a strict non-blocking optical switch.
- the above method of exchange may include:
- the light waves exchanged to the optical switching device include: the grouped light waves.
- the execution body of the above solution may be a wavelength selective switch.
- the above method embodiments will be further described in conjunction with subsequent device embodiments.
- the need for the switch matrix can be reduced, and the optical switching unit port is saved.
- an apparatus for optical switching may include: an optical switching unit 102, an optical grouping unit 103, and a service switching unit 101.
- the embodiment of the present invention exchanges multiple granularities.
- the optical switching unit 102 has an optical input port and a light output port, wherein a part of the optical output port is connected to the input port of the optical grouping unit 103;
- the optical grouping unit 103 has an optical input port and an optical output port, wherein the optical input port of the optical grouping unit 103 is connected to the optical output port of the optical switching unit 102, and the optical output port of the optical grouping unit 103 is connected to the optical input port of the optical switching unit 102;
- the optical switching unit 102 is for controlling the transmission path of the optical wave, for example, as shown in Figs. 2a and 2b, the optical switching unit 102a, any port input, arbitrary port output, the optical switching unit 102b, the multi-port input, and the function of one port output.
- the optical grouping unit 103 is used for optical wave grouping, for example, as shown in Fig. 2c, the optical grouping unit 103a functions to output the input fiber wavelengths arbitrarily. It can be understood that the function of the multi-port input of FIG.
- FIG. 2b and the output of one port can also be realized by the optical grouping unit 103a; the specific implementation is a multi-port input, and the light wave is output from the same output port when grouping (light wave)
- the path is the reverse of the path shown in Figure 2c).
- the arrows without arrows in Figures 2a and 2b can be represented as ports for input or output, and the lines with arrows are indicated as trajectories for light transmission.
- the input fiber can be directly output from any port through the optical switching unit 102, as shown in Figure 1: Track of fiber B:
- Optical fiber switching process Input fiber B -> optical switching unit 102 -> output fiber B Group, as shown in Figure 1, the wavelength of the input fiber C is divided into two groups of CI C2, which are respectively output from port 03 04; that is, output from the output fiber Cl and the output fiber C2 respectively;
- the wavelength group and wavelength switching process are as follows:
- I ⁇ Packet C2 Optical Switching Unit Output Port 04 Sub-wavelength switching: After the wavelength of the input fiber is exchanged by Electrical Cross Connect (EXC), it is loaded into any other fiber; as shown in Figure 1, the wavelength of the input fiber A
- the service switching unit can be composed of wavelength division multiplexing (WDM) - EXC - WDM, and the wavelength of the input fiber A is exchanged from the WDM - EXC - WDM service, and is output from 01, of course. It can be loaded into other packets for output; the subwavelength switching process is as follows:
- the above device may include only the optical grouping unit 103 and the optical switching unit 102.
- the optical switching unit 102 may be a strictly non-blocking optical switch, and may be a single-stage structure or a cascade structure, such as a three-dimensional drum electro-mechanical system (Three dimensional Micro Electromechanical System, 3D MEMS) Single stage structure.
- the optical grouping unit 103 implements any wavelength combination, and may be composed of a Wavelength Selective Switch (WSS).
- the number of WSSs may be determined by the maximum switching dimension of the network node composed of the optical switching fabric in the network, and the required optical switching.
- the size of the unit 102 may be the sum of the number of input fibers and the number of exchanged dimensions at the peak time.
- the specific form of the optical switching unit 102 and the optical grouping unit 103 in the embodiment of the present invention does not affect the implementation of the embodiment of the present invention.
- the optical fiber switching can be directly performed by the optical switching unit 102; the wavelength group and the wavelength switching are performed by the optical grouping unit 103; after the wavelengths are combined according to requirements, the requirement for the switch matrix can be reduced.
- 9 input fibers F1, F2...F9
- input fiber F1 needs to be divided into 8 groups at time T1, F2
- F3 - F9 must be directly collused; at time T2, F1 needs to be divided into 5 groups, and F2 is in the enjoyment.
- 49 49 exchange units are needed. .
- the output of the WSS can be fed back to the next level of WSS, enabling flexible combination of WSS to achieve different dimensions of exchange.
- Embodiment 2 The embodiment of the present invention further provides another apparatus for optical switching. This embodiment will be described in the context of sharing of optical grouping units.
- the optical switching unit 302 and the optical grouping unit 303 can be used to implement the expansion of the dimension by using the sharing of the optical grouping subunits. It is assumed that: at time T1, the optical fiber A requires output of 9 dimensions, and the optical fiber B requires output of 17 dimensions; As shown in Figure 3b, at time T2, fiber A requires output of 17 dimensions, and fiber B requires output of 9 dimensions. As shown in Figure 3c, at time T3, fiber A needs to output 7 dimensions, fiber B needs to output 6 dimensions, and fiber A needs to output 6 dimensions. A7, and fiber B6 need to be synthesized in 1 dimension.
- the optical switching unit may be composed of a three dimensional micro electromechanical system (3D MEMS) large optical switch
- the optical grouping unit may be composed of optical grouping subunits.
- the optical packet subunit has a 1-port input and a 9-dimensional output function, it can be understood that the input port and the output port may also be other numbers. The number of input ports and output ports should not be construed as limiting the embodiment of the present invention. .
- the input fiber A is input to the optical packet subunit 3 in the optical packet unit through the optical switching unit to form a 9-dimensional output; similarly, the input fiber B forms a 17-dimensional output through the optical packet subunits 1 and 2.
- connection relationship at time T1 is:
- the output dimension of the input fiber A becomes 17 dimensions, and the output dimension of the input fiber B becomes 9;
- the connection between the optical fibers A and B and the optical packet unit can be replaced by the optical switching unit.
- connection relationship at time T2 is:
- the input fiber A output dimension becomes 7 dimensions
- the input fiber B output dimension becomes 6 dimensions, where A7 and B6 are combined into one dimension.
- the total output dimensions of fiber A and B are 12 dimensions.
- the implementation may be: the optical packet unit is composed of an optical packet sub-unit, including a first optical packet sub-unit and a second optical packet sub-unit. And a third optical grouping subunit;
- An input port of the first optical grouping subunit is connected to an output port of the optical switching unit, a part of the output port of the first optical grouping subunit is connected to an input port of the third optical grouping subunit, and a part of the output interface is connected.
- An input port of the third optical packet subunit is connected to an output port of the first optical packet subunit, a part of the output port of the third optical packet subunit is connected to an input port of the second optical packet subunit, and a part of the output interface is connected An input port of the optical switching unit;
- An input port of the second optical packet subunit is connected to an output port of the third optical packet subunit, and an output port of the second optical packet subunit is connected to an input port of the optical switching unit.
- the light is combined according to requirements, which reduces the need for the switch matrix and saves the optical switching unit port. Further, the optical packet unit can be saved by sharing the optical packet unit.
- Embodiment 3 is an apparatus for optical switching according to an embodiment of the present invention. This embodiment will be described with a dimension expansion as a background.
- the optical switching unit 402 and the optical grouping unit 403 may be included;
- the input fiber B wavelength initial group is two groups B1 and B2, and it is determined that the input fiber B wavelengths are grouped into n groups, and the input fiber B can be input to the optical grouping unit 403 at the optical switching unit 402.
- the optical grouping unit 403 groups the wavelengths into n, and feeds them back to the optical switching unit 402, and the optical grouping unit 403 can output the n packets to an arbitrary output port. Thereby an output packet extension is achieved.
- the extension of the optical packet unit 403 can be achieved by the extension of the optical packet subunit.
- the optical packet subunit can also be used to extend the switching dimension; assuming that at time T1, input fiber B requires output of 9 dimensions; at time T2, input fiber B requires output of 17 dimensions;
- the output fiber is 9-dimensional and not n-dimensional, and the input fiber B is required to output 9-dimensional.
- the packet sub-unit 1 realizes the requirement, that is, the input fiber is input to the packet sub-unit 1 through the optical switching unit 402.
- the grouping subunit 1 divides the input light into 9 groups and feeds back to the output of the optical switching unit 402.
- the optical grouping unit 403 is composed of optical grouping subunits.
- the output dimension of the input fiber B becomes 17 dimensions, which can be achieved by adding the primary optical packet subunit 2.
- the first-level optical packet sub-unit 1 is re-grouped, wherein a set of outputs is fed back to the optical switching unit 402 and input to the second-level optical packet sub-unit 2, and the optical packet sub-unit 2 groups the wavelengths and feeds them back to the optical switching unit 402. 17-dimensional loss Out
- the light can be combined according to requirements, which can reduce the need for the switch matrix and save the optical switch unit port.
- Embodiment 4 of the present invention further provides an apparatus for optical switching. This embodiment will be described with a wavelength scheduling as a background.
- it may include: an optical switching unit 502, an optical grouping unit 503, and a service switching unit 501; assuming that the wavelengths ⁇ 1, ⁇ 2, ⁇ 3, and ⁇ 4 in the input fiber B are required to be switched into the fiber ⁇ .
- the scheduling process may be:
- the input fiber B is switched to the optical packet unit 503 via the optical switching unit 502, and the optical packet unit 503 divides the wavelength in the optical fiber B into B1 ( ⁇ 1, ⁇ 2, ⁇ 3, ⁇ 4) and ⁇ 2 ( ⁇ 5.. ⁇ . ⁇ 80) two groups, and fed back to the optical switching unit 502; the optical switching unit 502 simultaneously switches the B1 ( ⁇ 1, ⁇ 2, ⁇ 3, ⁇ 4) group and the input fiber ⁇ to the output port 01, that is, completes the wavelength ( ⁇ 1, ⁇ 2, ⁇ 3) , ⁇ 4) is switched to the fiber ⁇ .
- Another group ⁇ 2 ( ⁇ 5.. ⁇ . ⁇ 80) is output from other ports as required.
- the light can be combined according to requirements, which can reduce the need for the switch matrix and save the optical switch unit port.
- the medium can be a read only memory, a magnetic disk or a compact disk or the like.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
- Optical Communication System (AREA)
- Time-Division Multiplex Systems (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011536732A JP2012509627A (ja) | 2008-11-20 | 2009-11-17 | 光スイッチング方法及び装置 |
BRPI0922058A BRPI0922058A2 (pt) | 2008-11-20 | 2009-11-17 | método e dispositivo para comutação óptica. |
EP09827174A EP2357739A4 (en) | 2008-11-20 | 2009-11-17 | OPTICAL SWITCHING DEVICE AND METHOD |
CA2744111A CA2744111A1 (en) | 2008-11-20 | 2009-11-17 | Method and device for optical switching |
US13/111,172 US20110217038A1 (en) | 2008-11-20 | 2011-05-19 | Method and device for optical switching |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200810177646A CN101742363A (zh) | 2008-11-20 | 2008-11-20 | 一种光交换的方法和装置 |
CN200810177646.1 | 2008-11-20 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/111,172 Continuation US20110217038A1 (en) | 2008-11-20 | 2011-05-19 | Method and device for optical switching |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010057425A1 true WO2010057425A1 (zh) | 2010-05-27 |
Family
ID=42197841
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/CN2009/074979 WO2010057425A1 (zh) | 2008-11-20 | 2009-11-17 | 一种光交换的方法和装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20110217038A1 (zh) |
EP (1) | EP2357739A4 (zh) |
JP (1) | JP2012509627A (zh) |
CN (1) | CN101742363A (zh) |
BR (1) | BRPI0922058A2 (zh) |
CA (1) | CA2744111A1 (zh) |
WO (1) | WO2010057425A1 (zh) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102361467B (zh) * | 2011-07-22 | 2014-06-18 | 西安电子科技大学 | 无阻塞的光片上网络结构及其通信方法 |
EP2834990A1 (en) * | 2012-04-04 | 2015-02-11 | Telefonaktiebolaget L M Ericsson (Publ) | Apparatus and method for switching information transported using a hierarchical data structure |
GB201305801D0 (en) * | 2013-03-28 | 2013-05-15 | British Telecomm | Optical switch |
GB201305985D0 (en) * | 2013-04-03 | 2013-05-15 | British Telecomm | Optical switch |
CN104734799B (zh) * | 2013-12-19 | 2017-12-15 | 华为技术有限公司 | 光交换架构 |
CN106063169B (zh) * | 2014-03-06 | 2019-05-07 | 华为技术有限公司 | 一种数据处理方法及装置 |
CN103888857B (zh) * | 2014-03-11 | 2018-06-19 | 北京邮电大学 | 软定义弹性光交换网络中有共享调制复用能力的节点装置 |
US9749723B2 (en) * | 2015-03-05 | 2017-08-29 | Huawei Technologies Co., Ltd. | System and method for optical network |
WO2016165053A1 (zh) | 2015-04-13 | 2016-10-20 | 华为技术有限公司 | 光交叉互连节点和光信号交换的方法 |
US11316593B2 (en) | 2018-01-09 | 2022-04-26 | British Telecommunications Public Limited Company | Optical DWDM data and QKD transmission system |
EP4436075A3 (en) * | 2021-08-30 | 2024-12-11 | Ciena Corporation | Crosspoint switch with ýled io ports and imaging fiber cables |
Citations (3)
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CN1529191A (zh) * | 2003-10-16 | 2004-09-15 | 上海交通大学 | 基于双面镜光开关的动态可重构光分插复用模块 |
CN1819706A (zh) * | 2006-03-15 | 2006-08-16 | 重庆邮电学院 | 基于可调滤波器的光波带交换网络节点结构 |
CN101093264A (zh) * | 2006-06-23 | 2007-12-26 | 北京大学 | 用平行光纤解决obs中竞争的链路结构及波长分配方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3744343B2 (ja) * | 2000-11-08 | 2006-02-08 | 日本電気株式会社 | 光クロスコネクト装置 |
US6574386B1 (en) * | 2001-04-20 | 2003-06-03 | Transparent Networks, Inc. | Dynamically reconfigurable optical switching system |
US7340175B2 (en) * | 2002-01-18 | 2008-03-04 | Nec Corporation | Non-uniform optical waveband aggregator and deaggregator and hierarchical hybrid optical cross-connect system |
JP4530821B2 (ja) * | 2004-08-16 | 2010-08-25 | 富士通株式会社 | 光分岐挿入装置 |
-
2008
- 2008-11-20 CN CN200810177646A patent/CN101742363A/zh active Pending
-
2009
- 2009-11-17 EP EP09827174A patent/EP2357739A4/en not_active Withdrawn
- 2009-11-17 BR BRPI0922058A patent/BRPI0922058A2/pt not_active IP Right Cessation
- 2009-11-17 CA CA2744111A patent/CA2744111A1/en not_active Abandoned
- 2009-11-17 JP JP2011536732A patent/JP2012509627A/ja active Pending
- 2009-11-17 WO PCT/CN2009/074979 patent/WO2010057425A1/zh active Application Filing
-
2011
- 2011-05-19 US US13/111,172 patent/US20110217038A1/en not_active Abandoned
Patent Citations (3)
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CN1529191A (zh) * | 2003-10-16 | 2004-09-15 | 上海交通大学 | 基于双面镜光开关的动态可重构光分插复用模块 |
CN1819706A (zh) * | 2006-03-15 | 2006-08-16 | 重庆邮电学院 | 基于可调滤波器的光波带交换网络节点结构 |
CN101093264A (zh) * | 2006-06-23 | 2007-12-26 | 北京大学 | 用平行光纤解决obs中竞争的链路结构及波长分配方法 |
Non-Patent Citations (1)
Title |
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Also Published As
Publication number | Publication date |
---|---|
JP2012509627A (ja) | 2012-04-19 |
CN101742363A (zh) | 2010-06-16 |
CA2744111A1 (en) | 2010-05-27 |
US20110217038A1 (en) | 2011-09-08 |
EP2357739A1 (en) | 2011-08-17 |
EP2357739A4 (en) | 2012-04-04 |
BRPI0922058A2 (pt) | 2015-12-15 |
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