CN101202603A - Passive optical network system based on wavelength-division multiplex technique - Google Patents
Passive optical network system based on wavelength-division multiplex technique Download PDFInfo
- Publication number
- CN101202603A CN101202603A CNA2006101195820A CN200610119582A CN101202603A CN 101202603 A CN101202603 A CN 101202603A CN A2006101195820 A CNA2006101195820 A CN A2006101195820A CN 200610119582 A CN200610119582 A CN 200610119582A CN 101202603 A CN101202603 A CN 101202603A
- Authority
- CN
- China
- Prior art keywords
- optical
- wavelength
- multiplexer
- division
- branching device
- 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.)
- Pending
Links
Images
Landscapes
- Optical Communication System (AREA)
Abstract
A network system of light without light source based on the wavelength division multiplexing technique includes a plurality of optical line terminals which adopt uplink wavelength and downlink wavelength that are mutually independent, a wavelength division multiplexing/demultiplexer connected with the plurality of optical line terminals, a wavelength division multiplexing multiplexer connected with the wavelength division multiplexing/demultiplexer by optical fiber, and a plurality of optical splitters which adopt the same uplink wavelength and the same downlink wavelength corresponding to the optical line terminals and are connected with the wavelength division multiplexing multiplexer. A plurality of optical network units optically connected with the optical splitters. The invention realizes optical fibre communication among a plurality of optical line terminals and a plurality of optical network units through a single optical fibre, thus saving the optical fibre resources for the connecting section between an MAN and a district and reducing the cost of optical fibre access. When the network bandwidth is updating, alteration on the updating of the network bandwidth can be realized only by increasing the qualities of the accessed optical network line terminals and corresponding optical splitters, thus greatly reducing the alteration cost.
Description
Technical field
The invention belongs to the passive optical network technique field, particularly based on the passive optical network of wavelength-division multiplex technique.
Background technology
EPON (PON) provides being connected of optical line terminal (OLT) and a plurality of optical network units (ONU), share OLT to the optical fiber medium between the distant-end node (RN), have cost low, be convenient to safeguard, to advantages such as miscellaneous service are transparent, while PON transition to optical fiber smoothly arrives family (FTTH), thereby has fine development prospect.
EPON is a power Splittable EPON, adopts star coupler along separate routes, on/descending transmission adopts the TDMA/TDM mode to realize the shared channel bandwidth, because the luminous power distribution, thereby limited ONU quantity, influence the further network capacity extension.
1 OLT can be installed on the every optical fiber of traditional EPON carry 32 tunnel user, although saving that can be more a large amount of than traditional transmission means fiber resource, but in the big city of the density of population, when doing access network construction, still need to lay a large amount of optical fiber as transmission medium, cause initial stage whole networking expense costliness.
Summary of the invention
The object of the present invention is to provide a kind of passive optical network,, reduce network construction cost to solve the problem of the fiber resource deficiency in the existing EPON network based on wavelength-division multiplex technique.
For reaching above-mentioned purpose, the present invention adopts following technical scheme:
A kind of passive optical network based on wavelength-division multiplex technique comprises:
A plurality of optical line terminals, described optical line terminal adopt separate up wavelength and downstream wavelength;
The Wavelength division multiplexer/demultiplexer that is connected with described a plurality of optical line terminal light, when downlink optical signal passed through described Wavelength division multiplexer/demultiplexer, it was used for that the downlink optical signal that a plurality of optical line terminals are exported is converged to optical fiber and transmits as multiplexer; When uplink optical signal when the described Wavelength division multiplexer/demultiplexer, it is as demodulation multiplexer, is used for uplink optical signal demultiplexing and export the described optical line terminal of corresponding wavelength to respectively;
Wavelength-division demultiplexing/the multiplexer that is connected with described Wavelength division multiplexer/demultiplexer optical fiber, when uplink optical signal passes through described Wavelength division multiplexer/demultiplexer, it is as multiplexer, being used for that the uplink optical signal that described a plurality of optical branching devices are exported is converged to optical fiber transmits, when downlink optical signal passes through this Wavelength division multiplexer/demultiplexer, it is as demodulation multiplexer, is used for downlink optical signal demultiplexing and export the optical branching device of corresponding wavelength to respectively;
With a plurality of optical branching devices that described wavelength-division demultiplexing/multiplexer light is connected, described optical branching device adopts up wavelength and the downstream wavelength identical with corresponding described optical line terminal; When downlink optical signal passes through described optical branching device, described optical branching device is used for energy distribution with the downlink optical signal of same wavelength to the described a plurality of optical network units that are connected with this optical branching device, when uplink optical signal passes through described optical branching device, it is used for receiving and converging this uplink optical signal, and sends it to described wavelength-division demultiplexing/multiplexer;
Be connected a plurality of optical network units with described optical branching device light, each optical network unit adopts two identical optical wavelength transmission uplink and downlink data of coupled optical branching device, described optical network unit receives the downlink optical signal of the described optical branching device transmission that is connected with its light, and sends uplink optical signal in turn to the described optical branching device that is connected with its light according to time-multiplexed mode.
As a kind of improvement of the present invention, also comprise and be located at the image intensifer that connects on Wavelength division multiplexer/demultiplexer and the wavelength-division demultiplexing/multiplexer optical fiber.
As another improvement of the present invention, also comprise two pump light sources that are used to image intensifer that bi-directional gain is provided.
As a kind of optimal way of the present invention, described pump light source is ASE self-excitation radiating light source or super-radiance light emitting diode light source.
One improve as of the present invention, described a plurality of optical line terminals, described Wavelength division multiplexer/demultiplexer and image intensifer are positioned at same core machine room again.
As another optimal way of the present invention, described optical branching device is assigned to the optical network unit that is connected with this optical branching device with the energy of the downlink optical signal of same wavelength in average mode.
As an optimal way more of the present invention, described optical branching device is fused biconical taper formula optical fiber splitter or planar optical waveguide splitter.
As an optimal way more of the present invention, described Wavelength division multiplexer/demultiplexer and wavelength-division demultiplexing/multiplexer are film filter plate type device or array waveguide grating.
As an optimal way more of the present invention, described optical line terminal is provided with the optical fiber interface that is used for being connected to metropolitan area network.
As an optimal way more of the present invention, described optical line terminal be provided with 100,000,000 or gigabit Ethernet on connect mouth.
As an optimal way more of the present invention, described optical branching device is the wavelength of same wave band with up wavelength and downstream wavelength that corresponding described optical line terminal adopts.
Of the present invention having the following advantages:
1, utilizes wavelength-division multiplex technique, realize a plurality of optical line terminals and numerous optical network unit optical fiber communications, saved the fiber resource of the linkage section of metropolitan area network and sub-district, reduced the optical fiber cost of access of metropolitan area network by simple optical fiber.
2, the passive optical network based on wavelength-division multiplex technique provided by the invention, when the network bandwidth is upgraded, only need to increase the optical network line terminal quantity and the corresponding optical branching device of the use different wave length that inserts, just can realize transformation, greatly reduce the cost of transformation network bandwidth upgrading.
3, by wavelength-division multiplex technique, can be implemented in increases tens of times transmission bandwidth (relevant with multiplexing number of wavelengths) on the existing basis, and the user that can increase tens of times inserts quantity.
4, adopt two pump light sources to provide bi-directional gain for image intensifer 50, the two directional pump light source amplifies the up-downgoing light signal simultaneously, provides cost savings.
5, a plurality of optical line terminals, image intensifer unification can be positioned in the good core machine room of temperature conditions, increase the useful life of circuit, and reduce the Network Management cost.
Further specify the present invention below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the existing passive optical network structure;
Fig. 2 is the passive optical network example structure schematic diagram that the present invention is based on wavelength-division multiplex technique.
Embodiment
As shown in Figure 2, a kind of passive optical network based on wavelength-division multiplex technique comprises;
A plurality of optical line terminals 10, each optical line terminal all adopt separate up wavelength and downstream wavelength.Be optical line terminal 1,2 ..., n adopt respectively wavelength be λ 1, λ 2 ..., λ n light signal as uplink optical signal, and light network optical line terminal 1,2 ..., n adopt respectively wavelength be λ 1 ', λ 2 ' ..., λ n ' light signal as downlink optical signal.Described each optical line terminal both can be by being connected to metropolitan area network on the optical fiber interface, also can be by 100,000,000 or connected mode such as gigabit Ethernet mouth connect equipment such as core switch;
The Wavelength division multiplexer/demultiplexer 20 that is connected with described a plurality of optical line terminal light, when the downlink optical signal of a plurality of optical line terminal 10 outputs passes through this Wavelength division multiplexer/demultiplexer 20, it is as multiplexer, be used for optical line terminal 1,2 ..., n output wavelength be λ 1, λ 2 ..., λ n downlink optical signal converge in the optical fiber and transmit.When the uplink optical signal of wavelength-division demultiplexing/multiplexer 60 outputs passes through this Wavelength division multiplexer/demultiplexer 20, it is as demodulation multiplexer, be used for wavelength be λ 1 ', λ 2 ' ..., λ n ' uplink optical signal respectively demultiplexing and export to corresponding wavelength optical line terminal 1,2 ..., among the n;
Wavelength-division demultiplexing/the multiplexer 60 that is connected with described Wavelength division multiplexer/demultiplexer optical fiber, the effect of wavelength-division demultiplexing/multiplexer 60 is opposite with described Wavelength division multiplexer/demultiplexer 20, promptly when uplink optical signal passes through this Wavelength division multiplexer/demultiplexer 60, it is as multiplexer, be used for wavelength with n optical branching device output and be λ 1 ', λ 2 ' ..., λ n ' uplink optical signal converge in the optical fiber and transmit.When downlink optical signal when this Wavelength division multiplexer/demultiplexer 60, it is as demodulation multiplexer, be used for wavelength be λ 1, λ 2 ..., λ n downlink optical signal demultiplexing and exporting in n the optical branching device of corresponding wavelength respectively;
With a plurality of optical branching devices 70 that described wavelength-division demultiplexing/multiplexer light is connected, each optical branching device all adopts up wavelength and the downstream wavelength identical with corresponding optical line terminal.When the downlink optical signal of wavelength-division demultiplexing/multiplexer 60 outputs passes through this optical branching device 70, it is used for energy distribution with the downlink optical signal of same wavelength to the optical network unit that is connected with this optical branching device, to increase the quantity of the optical network unit (ONU) that can insert.The energy that preferably distributes the light signal of same wavelength in the present embodiment in average mode.When a plurality of optical network units 80 according to the uplink optical signal of time-division multiplex technology output during by this optical branching device 70, it is used for receiving and converging this uplink optical signal, and exports it to described wavelength-division demultiplexing/multiplexer 60.Described optical branching device 70 can be deposited in the user area, for example place such as building, user area.
Be connected a plurality of optical network units 80 with described optical branching device 70 light, described optical network unit 80 receives the downlink optical signal of described optical branching device 70 transmissions that are connected with its light, and sends uplink optical signal in turn to the described optical branching device 70 that is connected with its light according to time-multiplexed mode.Described optical network unit 80 adopts coupled optical branching device 70 two identical optical wavelength to transmit the uplink and downlink data.The transmission of wherein said uplink and downlink data can adopt time-multiplexed mode to carry out.Because this part can adopt time-multiplexed existing techniques in realizing in the optical-fiber network, therefore omit detailed description to this part;
And be located at and be used to strengthen the energy of up-downgoing light signal and the image intensifer 50 of increase transmission range on the optical fiber that connects Wavelength division multiplexer/demultiplexer and wavelength-division demultiplexing/multiplexer;
And be used to image intensifer 50 that two pump light sources 40,50 of bi-directional gain are provided, described pump light source 30,40 can adopt ASE (amplified spont-aneous emission, Amplification of Spontaneous Emission) self-excitation radiating light source also can use SLD (Super Luminescent Diode) super-radiance light emitting diode light source.
Wherein, described Wavelength division multiplexer/demultiplexer 20 and wavelength-division demultiplexing/multiplexer 60, can be film filter plate type (ThinFilm Filter Type WDM) device, also can be array waveguide grating (Array Waveguide Grating Type WDM, AGW).
Wherein, described optical branching device 70 can use fused biconical taper formula optical fiber splitter (Fused Fiber Splitter), also can use planar optical waveguide splitter (PLC Splitter).Each described optical branching device can connect 2～64 optical network units.
Described optical branching device 70 is the wavelength of same wave band with up wavelength and downstream wavelength that corresponding described optical line terminal 10 adopts.This wave band can be C-band wavelength (1530nm～1565nm), E+ wave band wavelength (1360nm～1460nm), also can use L-band (1570-1603nm) etc.
Claims (11)
1. passive optical network based on wavelength-division multiplex technique is characterized in that comprising:
A plurality of optical line terminals, described optical line terminal adopt separate up wavelength and downstream wavelength;
The Wavelength division multiplexer/demultiplexer that is connected with described a plurality of optical line terminal light, when downlink optical signal passed through described Wavelength division multiplexer/demultiplexer, it was used for that the downlink optical signal that a plurality of optical line terminals are exported is converged to optical fiber and transmits as multiplexer;
When uplink optical signal when the described Wavelength division multiplexer/demultiplexer, it is as demodulation multiplexer, is used for uplink optical signal demultiplexing and export the described optical line terminal of corresponding wavelength to respectively;
Wavelength-division demultiplexing/the multiplexer that is connected with described Wavelength division multiplexer/demultiplexer optical fiber, when uplink optical signal passes through described Wavelength division multiplexer/demultiplexer, it is as multiplexer, being used for that the uplink optical signal that described a plurality of optical branching devices are exported is converged to optical fiber transmits, when downlink optical signal passes through this Wavelength division multiplexer/demultiplexer, it is as demodulation multiplexer, is used for downlink optical signal demultiplexing and export the optical branching device of corresponding wavelength to respectively;
With a plurality of optical branching devices that described wavelength-division demultiplexing/multiplexer light is connected, described optical branching device adopts up wavelength and the downstream wavelength identical with corresponding described optical line terminal; When downlink optical signal passes through described optical branching device, described optical branching device is used for energy distribution with the downlink optical signal of same wavelength to the described a plurality of optical network units that are connected with this optical branching device, when uplink optical signal passes through described optical branching device, it is used for receiving and converging this uplink optical signal, and sends it to described wavelength-division demultiplexing/multiplexer;
Be connected a plurality of optical network units with described optical branching device light, each optical network unit adopts two identical optical wavelength transmission uplink and downlink data of coupled optical branching device, described optical network unit receives the downlink optical signal of the described optical branching device transmission that is connected with its light, and sends uplink optical signal in turn to the described optical branching device that is connected with its light according to time-multiplexed mode.
2. the passive optical network based on wavelength-division multiplex technique according to claim 1 is characterized in that also comprising: be located at the image intensifer that connects on Wavelength division multiplexer/demultiplexer and the wavelength-division demultiplexing/multiplexer optical fiber.
3. the passive optical network based on wavelength-division multiplex technique according to claim 2 is characterized in that: also comprise two pump light sources that are used to image intensifer that bi-directional gain is provided.
4. the passive optical network based on wavelength-division multiplex technique according to claim 3 is characterized in that: described pump light source is ASE self-excitation radiating light source or super-radiance light emitting diode light source.
5. the passive optical network based on wavelength-division multiplex technique according to claim 2 is characterized in that: described a plurality of optical line terminals, described Wavelength division multiplexer/demultiplexer and image intensifer are positioned at same core machine room.
6. the passive optical network based on wavelength-division multiplex technique according to claim 1 is characterized in that: described optical branching device is assigned to the optical network unit that is connected with this optical branching device with the energy of the downlink optical signal of same wavelength in average mode.
7. the passive optical network based on wavelength-division multiplex technique according to claim 1 is characterized in that: described optical branching device is fused biconical taper formula optical fiber splitter or planar optical waveguide splitter.
8. the passive optical network based on wavelength-division multiplex technique according to claim 1 is characterized in that: described Wavelength division multiplexer/demultiplexer and wavelength-division demultiplexing/multiplexer are film filter plate type device or array waveguide grating.
9. the passive optical network based on wavelength-division multiplex technique according to claim 1 is characterized in that: described optical line terminal is provided with the optical fiber interface that is used for being connected to metropolitan area network.
10. the passive optical network based on wavelength-division multiplex technique according to claim 1 is characterized in that: described optical line terminal be provided with 100,000,000 or gigabit Ethernet on connect mouth.
11. the passive optical network based on wavelength-division multiplex technique according to claim 1 is characterized in that: described optical branching device is the wavelength of same wave band with up wavelength and downstream wavelength that corresponding described optical line terminal adopts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101195820A CN101202603A (en) | 2006-12-13 | 2006-12-13 | Passive optical network system based on wavelength-division multiplex technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101195820A CN101202603A (en) | 2006-12-13 | 2006-12-13 | Passive optical network system based on wavelength-division multiplex technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101202603A true CN101202603A (en) | 2008-06-18 |
Family
ID=39517589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101195820A Pending CN101202603A (en) | 2006-12-13 | 2006-12-13 | Passive optical network system based on wavelength-division multiplex technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101202603A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826919A (en) * | 2010-05-11 | 2010-09-08 | 东南大学 | Mixed type passive optical network structure and method for positioning and restoring faults thereof |
| CN102143408A (en) * | 2010-06-10 | 2011-08-03 | 华为技术有限公司 | Method, device and system for communicating passive optical network |
| CN102695101A (en) * | 2011-03-21 | 2012-09-26 | 苏州海光芯创光电科技有限公司 | Passive optical network over wavelength division multiplexing |
| CN102927522A (en) * | 2012-11-23 | 2013-02-13 | 深圳市华星光电技术有限公司 | Backlight module and LCD adopting same |
| CN103338088A (en) * | 2013-06-17 | 2013-10-02 | 太仓市同维电子有限公司 | Optical fiber communication multiplexing device |
| CN103580749A (en) * | 2013-11-27 | 2014-02-12 | 东南大学 | Passive optical network chain monitoring system with address mark shunt and monitoring method |
| CN105792027A (en) * | 2014-12-22 | 2016-07-20 | 中兴通讯股份有限公司 | Passive optical network system, controller and communication method |
| CN109412741A (en) * | 2018-09-17 | 2019-03-01 | 中国科学院电工研究所 | The method of large scale array formula system status monitoring based on fiber optic communication and software upgrading |
| CN109982171A (en) * | 2019-03-20 | 2019-07-05 | 东南大学 | One kind can zoom out multi-hop optical access network and intelligent management system |
| CN110113240A (en) * | 2019-04-24 | 2019-08-09 | 西安电子科技大学 | Bus paradigmatic system based on 100 m ethernet mouth |
-
2006
- 2006-12-13 CN CNA2006101195820A patent/CN101202603A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826919B (en) * | 2010-05-11 | 2013-07-31 | 东南大学 | Mixed type passive optical network structure and method for positioning and restoring faults thereof |
| CN101826919A (en) * | 2010-05-11 | 2010-09-08 | 东南大学 | Mixed type passive optical network structure and method for positioning and restoring faults thereof |
| CN102143408A (en) * | 2010-06-10 | 2011-08-03 | 华为技术有限公司 | Method, device and system for communicating passive optical network |
| WO2011153878A1 (en) * | 2010-06-10 | 2011-12-15 | 华为技术有限公司 | Method, apparatus and system for passive optical network communication |
| CN102143408B (en) * | 2010-06-10 | 2013-12-04 | 华为技术有限公司 | Method, device and system for communicating passive optical network |
| CN102695101B (en) * | 2011-03-21 | 2015-11-18 | 苏州海光芯创光电科技有限公司 | EPON on a kind of wavelength division multiplexing |
| CN102695101A (en) * | 2011-03-21 | 2012-09-26 | 苏州海光芯创光电科技有限公司 | Passive optical network over wavelength division multiplexing |
| CN102927522A (en) * | 2012-11-23 | 2013-02-13 | 深圳市华星光电技术有限公司 | Backlight module and LCD adopting same |
| CN102927522B (en) * | 2012-11-23 | 2015-07-01 | 深圳市华星光电技术有限公司 | Backlight module and LCD adopting same |
| CN103338088A (en) * | 2013-06-17 | 2013-10-02 | 太仓市同维电子有限公司 | Optical fiber communication multiplexing device |
| CN103580749A (en) * | 2013-11-27 | 2014-02-12 | 东南大学 | Passive optical network chain monitoring system with address mark shunt and monitoring method |
| CN103580749B (en) * | 2013-11-27 | 2016-03-30 | 东南大学 | Containing EPON link monitoring system and the method for supervising of address mark splitter |
| CN105792027A (en) * | 2014-12-22 | 2016-07-20 | 中兴通讯股份有限公司 | Passive optical network system, controller and communication method |
| CN105792027B (en) * | 2014-12-22 | 2019-11-29 | 南京中兴新软件有限责任公司 | Passive optical network, controller and the method for communication |
| CN109412741A (en) * | 2018-09-17 | 2019-03-01 | 中国科学院电工研究所 | The method of large scale array formula system status monitoring based on fiber optic communication and software upgrading |
| CN109412741B (en) * | 2018-09-17 | 2020-08-04 | 中国科学院电工研究所 | Large-scale array system state monitoring and software upgrading method based on optical fiber communication |
| CN109982171A (en) * | 2019-03-20 | 2019-07-05 | 东南大学 | One kind can zoom out multi-hop optical access network and intelligent management system |
| CN109982171B (en) * | 2019-03-20 | 2021-11-02 | 东南大学 | Remote multi-hop optical access network and intelligent management system |
| CN110113240A (en) * | 2019-04-24 | 2019-08-09 | 西安电子科技大学 | Bus paradigmatic system based on 100 m ethernet mouth |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101202603A (en) | Passive optical network system based on wavelength-division multiplex technique | |
| US8554079B2 (en) | Wavelength division and time division multiplex mixing passive optical network system, terminal and signal transmission method | |
| KR100921797B1 (en) | Wavelength Division Multiplexing - Passive Optical Network system | |
| CN101729949B (en) | WDM PON device with dynamically allocable wavelengths | |
| CN101197638B (en) | hybrid passive optical network system | |
| CN102710361B (en) | A kind of distributed base station signal transmission system and communication system | |
| CN101444017A (en) | Passive optical network based on reflective semiconductor optical amplifier | |
| CN103370888A (en) | Optical network communication system with optical line terminal transceiver and method of operation thereof | |
| CN102656832A (en) | Split/smart channel allocated WDM-PON architecture | |
| CN101141346B (en) | Wavelength division multiplexing passive optical network device | |
| CN101662707B (en) | Method and device for sharing broadband light source in a plurality of WDM-PON systems | |
| CN102695101A (en) | Passive optical network over wavelength division multiplexing | |
| CN104579536A (en) | Uplink and downlink channel reusing wavelength division multiplexing passive optical network system | |
| CN101056155B (en) | Optical source concentrated wave division multiplexing passive optical network for simultaneously generating the DPSK and OOK signals | |
| CN101471730A (en) | Optical fiber wideband access system and optical network unit based on WDM structure | |
| CN200983593Y (en) | Passive optical network system based on wave division multiplexing technology | |
| CN202004922U (en) | Passive optical network system on wavelength division multiplexing | |
| CN105025401B (en) | A kind of TWDM-PON system based on subnet extension | |
| CN103475955B (en) | Descending DPSK modulation and the mixing TWDM-PON system of up directly modulation | |
| Cao et al. | A novel architecture of reconfigurable WDM/TDM-PON | |
| CN102104814A (en) | Passive optical network | |
| CN201150067Y (en) | New-style mixed type passive optical network system | |
| CN103281603A (en) | Multi-wavelength passive optical network system | |
| CN201957194U (en) | Passive optical network | |
| Almalaq | Study of bidirectional broadband passive optical network (BPON) using EDFA |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20080618 |