CN104426599B - A kind of communication system for being used for time-division and wavelength division multiplexed optical network - Google Patents
A kind of communication system for being used for time-division and wavelength division multiplexed optical network Download PDFInfo
- Publication number
- CN104426599B CN104426599B CN201310405216.1A CN201310405216A CN104426599B CN 104426599 B CN104426599 B CN 104426599B CN 201310405216 A CN201310405216 A CN 201310405216A CN 104426599 B CN104426599 B CN 104426599B
- Authority
- CN
- China
- Prior art keywords
- fiber
- optical
- profile
- coupled
- trunk
- 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.)
- Active
Links
Landscapes
- Optical Communication System (AREA)
Abstract
The present invention relates to a kind of optical line terminal for Optical Access Network, including one or more receivers, for receiving uplink signal；One or more transmitters, for sending downlink signal；Two array waveguide gratings, each array waveguide grating are coupled to remote node by corresponding different trunk optical fibers respectively；One or more 1 × 2 photoswitches, for the connection situation according to the trunk optical fiber and the profile fiber being coupled between the remote node and optical-fiber network user equipment, one be selectively coupled to the output terminal of each transmitter in described two array waveguide gratings.The invention further relates to corresponding remote node, optical-fiber network user equipment and its operating methods.
Description
Technical field
The invention mainly relates to optical communication techniques, have in particular in the case of trunk and/or profile fiber disconnection
There are the time-division of defencive function and wavelength division multiplexed optical network communication system.
Background technology
As such as multimedia application such as 3D TVs, Telemedicine, game on line, interactive remote video education are fast
Exhibition is hailed, it is also higher and higher to the bandwidth demand of broadband access network.In fiber to the home (fiber-to-the-home, abbreviation
FTTH in configuration), and next-generation passive optical network (next generation passive optical network, referred to as
NG-PON2) message transmission rate for terminal user's enjoyment high speed provides the solution for the prospect of having much.Most of operator
All expect that NG-PON2 is capable of providing the access of the bandwidth of bigger, higher splitting ratio, longer transmission range and bigger and holds
Amount.At present, the bandwidth expection of NG-PON2 will increase to the level of 40Gb/s.
In numerous technical solutions, time-division and wavelength division multiplexed optical network (time and wavelength division
Multiplexed passive optical network, abbreviation TWDM-PON) it is chosen as the primary solution of NG-PON2.
TWDM-PON is stacked by four 10G passive networks (10G-passive optical network, abbreviation XG-PON), tool
Standby four pairs of operation wavelengths, typical splitting ratio are 1: 64, obtain the downstream rate of 40Gbps and the upstream rate of 10Gbps.
On each wavelength, TWDM-PON is still held using the multiplexing of the downlink of XG-PON and multi-upstream access technology, time slot granularity, multicast
Amount and Bandwidth sharing mechanism.
Due in some cases, connection optical line terminal (optical line terminal, abbreviation OLT) with it is long-range
Trunk optical fiber and/or connection remote node and optical-fiber network user (optical between node (remote node, abbreviation RN)
Network user, abbreviation ONU) between profile fiber it is possible that being disconnected, it is therefore necessary to establish corresponding network protection machine
It makes to cope with such case, so as to improve the reliability of TWDM-PON networks.
Used by existing TDM/WDM-PON hybrid systems in protection mechanism, need to set array in remote node
Waveguide optical grating (array wavelength gating, abbreviation AWG), this in ITU-T and FSAN standards to TWDM-PON systems
Remote node using the requirement of optical branching device be inconsistent.In addition, in the above-mentioned existing mixed stocker with protection mechanism
In system, adjacent ONU is interconnected amongst one another in pairs, forms the protection structure of one kind 1: 1, that is to say, that in the distribution of a corresponding ONU
When optical fiber disconnects, piggybacking is communicated in the profile fiber corresponding to another ONU matched with it.
Invention content
Protection mechanism has a series of problem used by aforementioned existing TDM/WDM-PON hybrid systems.First,
It is paired with each other it is possible that the problem of configuration information is safe between ONU.In addition, the pairing interconnection of two neighboring ONU needs to configure
A large amount of optical fiber considerably increases the complexity and cost of system structure.
In order to overcome the above problem, have this application provides one kind in the case where trunk and/or profile fiber disconnect
The TWDM-PON systems of defencive function, including optical line terminal, remote node and optical-fiber network user equipment.
A kind of optical line terminal for Optical Access Network is provided according to one embodiment of the application, including one or
Multiple receivers, for receiving uplink signal；One or more transmitters, for sending downlink signal；Two Waveguide array light
Grid, each array waveguide grating are coupled to remote node by corresponding different trunk optical fibers respectively；One or more 1 ×
2 photoswitches, for according to the trunk optical fiber and the distribution being coupled between the remote node and optical-fiber network user equipment
The output terminal of each transmitter is selectively coupled in described two array waveguide gratings by the connection situation of optical fiber
One.
Particularly, the optical line terminal includes two array waveguide gratings, respectively the first and second Waveguide array light
Grid；The difference trunk optical fiber includes the first and second trunk optical fibers；The optical line terminal further includes monitoring module, for pair
The working condition of one or more of receivers is monitored, and according to monitoring result judge first trunk optical fiber and
The connection situation of the profile fiber；And when the judging result for first trunk optical fiber and the profile fiber all
When connection, the monitoring module is for controlling one or more of 1x2 photoswitches, so that one
Or the output terminal of multiple transmitters is couple to first array waveguide grating；When the judging result is the first trunk light
When fibre disconnects, the monitoring module is for controlling all 1x2 photoswitches, so that all transmittings
The output terminal of machine is couple to the second array waveguide optical grating；It is described when one or more in the profile fiber disconnects
Monitoring module is for controlling one or more of 1 × 2 photoswitches, so that the profile fiber phase with the disconnection
The output terminal of the corresponding transmitter is couple to the second array waveguide optical grating.
Particularly, the optical line terminal further includes Wave decomposing multiplexer, defeated with one or more of receivers
Enter end coupling, for being demultiplexed to uplink signal；Wavelength division multiplexer, one end and first array waveguide grating and institute
Wave decomposing multiplexer coupling is stated, the other end is coupled with first trunk optical fiber, for detaching uplink and downlink signals；Circulator, coupling
It is connected between the second array waveguide optical grating and second trunk optical fiber and is coupled in second trunk optical fiber and institute
Between stating wavelength division multiplexer, the downlink signal for the second array waveguide optical grating to be received is transferred to second trunk
Optical fiber and by the uplink signal transmissions received from second optical fiber give the wavelength division multiplexer.
Particularly, the optical line terminal further includes high power laser light generator, in the control of the monitoring module
The lower transmitting high power laser light of system for the remote node so as to power.
Remote node in a kind of optical-fiber network provided according to another embodiment of the present invention, including two optical branching devices,
It is respectively coupled to corresponding different trunk optical fibers；One or more 2x2 photoswitches, for passing through one in two profile fibers
It is coupled to corresponding optical-fiber network user equipment；Control module, for controlling one or more of 2x2 photoswitches, base
In the connection situation of the trunk optical fiber and the profile fiber, the optical-fiber network user equipment is selectively made to pass through described two
One be coupled in described two optical branching devices in profile fiber.
Particularly, the remote node equipment includes two optical branching devices, respectively the first and second optical branching devices；It is described
Trunk optical fiber includes the first trunk optical fiber for being coupled with first optical branching device and coupled with second optical branching device the
Two trunk optical fibers；Corresponding two profile fibers of each 2x2 photoswitches include the first and second two profile fibers；
The control module be used for when first trunk optical fiber with first profile fiber all connects every described when, to the 2x2 light
Switch is controlled, so that each optical-fiber network user equipment is coupled to institute by corresponding first profile fiber
State the first optical branching device；When first trunk optical fiber disconnects, the 2x2 photoswitches are controlled, so that
Each optical-fiber network user equipment is coupled to second optical branching device by corresponding second profile fiber；When one
Or a plurality of first profile fiber is controlled the 2x2 photoswitches, so that described first with disconnection when disconnecting
The optical-fiber network user equipment is coupled to second light point to profile fiber by corresponding second profile fiber accordingly
Road device and then it is coupled to second trunk optical fiber.
Particularly, the remote node further includes wavelength division multiplexer, is coupled in first trunk optical fiber and described the
Between one optical branching device, for the laser signal for power supply emitted from optical line terminal to be isolated from downlink signal
Come；Photovoltage modular converter, for the laser signal injected from optical line terminal to be converted into electric signal, for for institute
State remote node power supply.
Particularly, the control module is used for when one or more first profile fiber disconnects, to the 2x2 light
Switch is controlled, so that the optical-fiber network user equipment corresponding with first profile fiber of disconnection is with identical
Other described optical-fiber network user equipmenies of wavelength are coupled to second light point by respective first profile fiber
Road device and then it is coupled to second trunk optical fiber.
Receiving module is included according to a kind of optical-fiber network user equipment that the another embodiment of the application is provided, is come for receiving
From in the downlink signal of remote node；Transmitting module, for sending uplink signal to the remote node；1x2 photoswitches, are used for
Connection situation based on the profile fiber and the trunk optical fiber that is coupled between the remote node and optical line terminal
The user equipment is selectively coupled to the remote node by connection situation by one in two profile fibers.
Particularly, two profile fibers include the first and second profile fibers；The remote node passes through the first He
Second trunk optical fiber is coupled to the optical line terminal；The user equipment further includes monitoring module, for the receiver
Working condition be monitored, and the connection situation of first profile fiber is judged according to monitoring result；And when described the
When one trunk optical fiber is all connected with first profile fiber, the 1x2 photoswitches are controlled, so that the light
Network user device is coupled to the remote node by first profile fiber；When first trunk optical fiber disconnects
It waits, the 1x2 photoswitches is controlled, so that the optical-fiber network user equipment is coupled by second profile fiber
To the remote node；When first profile fiber disconnects, the 1x2 photoswitches are controlled, so as to make the light
Network user device is coupled to the remote node by second profile fiber.
The one kind provided according to the application one embodiment carries out signal biography in optical transport network by optical line terminal
Defeated method, the connection situation information including obtaining the first trunk optical fiber between the optical line terminal and remote node；It obtains
Take the connection situation information of the profile fiber between the remote node and one or more optical-fiber network user equipmenies；According to above-mentioned
The information that two steps obtain determines to use first trunk optical fiber or the second trunk optical fiber on partly or completely wavelength
It communicates with the remote node.
A kind of method for carrying out signal transmission in optical-fiber network user equipment provided according to the application another embodiment,
Including：Obtain the connection situation information of the first profile fiber between the smooth user equipment and remote node；It obtains described remote
Trunk optical fiber connection situation information between Cheng Jiedian and optical line terminal；It determines to use according to the information that above-mentioned two step obtains
First profile fiber or the second profile fiber communicate.
The one kind provided according to the application another embodiment carries out signal biography in optical transport network by remote node
Defeated method, including：Obtain the first trunk optical fiber connection situation information between the remote node and optical line terminal and
The first profile fiber connection situation information between the remote node and optical-fiber network user equipment；The remote node is configured,
So that in the case where first trunk optical fiber and/or first profile fiber disconnect, assist the optical line terminal with
And the optical-fiber network user is communicated using the second trunk optical fiber and the second profile fiber.
TWDM-PON systems provided in the embodiment of the present invention are to comply fully with the TWDM-PON of ITU-T and FSAN standards
System structure.In addition, compared with existing protection mechanism, system provided herein does not need to be interconnected between ONU,
The problem of so as to avoid information security, also reduces the complexity of system, so as to improve the degree of reliability of system, reduces
Overall cost.
Description of the drawings
Fig. 1 shown showing for the TWDM-PON systems according to the application one embodiment under all optical fiber all connection situations
It is intended to；
Signal shown in Fig. 2 under trunk optical fiber disconnection for the TWDM-PON systems according to the application one embodiment
Figure；
Meaning shown in Fig. 3 in the case where profile fiber is disconnected for the TWDM-PON systems according to the application one embodiment
Figure；
Fig. 4 show the communication means flow chart of optical line terminal according to an embodiment of the invention；
Fig. 5 show the communication means flow chart of optical-fiber network remote node according to an embodiment of the invention；And
Fig. 6 show the communication means flow chart of optic network user terminal according to an embodiment of the invention.
Specific embodiment
The manufacture and use of embodiments herein is discussed further below.However, it should be understood that the present invention provides
Many feasible inventive concepts that can implement under various specific backgrounds.The specific embodiment discussed is only to illustrate to manufacture
Concrete mode with the present invention is used, does not limit the scope of the invention.
Fig. 1 show the TWDM-PON systems provided in the case where all optical fiber are all connected according to the application one embodiment
The schematic diagram of system.As shown in Figure 1, the system includes OLT100, RN200 and the ONU301- by optical fibre coupling and communication
30N.It is coupled between OLT100 and RN200 by trunk optical fiber 120 or 130 phase of spare trunk optical fiber.OLT100 can include connecing
Receipts machine 1042-1048 can also include transmitter 1012-1018.In addition, each receiver can be coupled to a monitoring mould
Block, such as monitoring modular 106 are responsible for the working condition of monitoring receiver 1042, and other receivers can also be coupled to accordingly
Monitoring modular (not shown).
In addition, OLT100 can also include a control module 107, two AWG1022 and 1024 and and transmitter
1 × 2 photoswitch 1092-1098 that 1012-1018 is coupled accordingly.Control module 107 is according to the monitoring knot of monitoring modular 106
Fruit judges the connection situation of trunk optical fiber 120 and profile fiber 210-2N0, and based on the judging result to photoswitch
1092-1098 is configured, so as to which transmitter 1012-1018 be made to be respectively coupled to AWG1022 or 1024, so as to pass through trunk light
Fibre 120 or 130 communicates with RN200.
According to one embodiment of the application, OLT100 can also include Wave decomposing multiplexer (de-multiplexer)
103 are coupled to the input terminal of receiver 1042-1048, for being demultiplexed to uplink signal.OLT100 can also include wave
Division multiplexer (wavelength division multiplexer, abbreviation WDM) 105, one end is coupled to Wave decomposing multiplexer
103 and AWG1022, the other end are coupled to trunk optical fiber 120, for detaching uplink and downlink signals.
According to one embodiment of the application, OLT100 can also include circulator 110, in trunk optical fiber 120 or
When any profile fiber disconnects, downlink signal by AWG1024 with the 1-2 of circulator 110 is connected and is coupled to spare master
Dry optical fiber 130；It is additionally operable to that when trunk optical fiber 120 or the disconnection of any profile fiber, uplink signal is passed through spare trunk
The 1-3 of optical fiber 130 and circulator connections are coupled to WDM105.
According to one embodiment of the application, OLT100 can also include high power laser light generator 108, for controlling
Emit the high power laser light of such as 15dBm under the control of module 107 so as to power for remote node.According to one embodiment, swash
Optical generator 108 can be coupled between control module 107 and wavelength division multiplexer 105.
Remote node 200 is further included in the TWDM-PON systems provided according to one embodiment of present invention.Long-range section
Point 200 can include optical branching device 2022 and 2024, be respectively coupled to trunk optical fiber 120 and spare trunk optical fiber 130.RN200
Control module 203 and N number of 2 × 2 photoswitch are further included, for inciting somebody to action corresponding N number of ONU couplings under the control of control module 203
It is connected to optical branching device 2022 or 2024.
According to one embodiment of the application, RN200 can also include WDM204, be coupled in trunk optical fiber 120 and light
Between splitter 2022, for by from OLT100 receive for the laser signal powered to RN200 from downlink signal point
It separates out and.RN200 can also include photovoltage converter 206, for the laser signal injected from OLT100 to be converted into electricity
Signal, so as to power for RN200.According to one embodiment, photovoltage converter 206 can be coupled in WDM204 and control mould
Between block 203.
The TWDM-PON systems provided according to one embodiment of the application can also include one or more ONU301-
30N.By taking ONU301 as an example, including receiving module 3011 and transmitting module 3012, monitoring modular 3014 is used for receiving module
The situation of 3011 reception downlink signals is monitored, the photoswitch 3016 of control module 3015 and 1 × 2.Control module 3015
The connection situation of profile fiber 210 or trunk optical fiber 120 is judged for the monitoring result based on monitoring modular 3014, and
Photoswitch 3016 is controlled according to judging result, it is made to be coupled with profile fiber 210 or spare profile fiber 212.
According to one embodiment of the application, ONU301 further includes WDM3013 for being detached to uplink and downlink signals.
Introduced respectively below in conjunction with Fig. 4-6 under different optical fiber connection situations, with OLT100 RN200 and ONU301
For equipment operating process.Fig. 4 is shown carries out signal transmission according to the OLT100 described in the application one embodiment
Method；Fig. 5 show the method that signal transmission is carried out according to the ONU301 described in the application one embodiment；Fig. 6 is according to this
Apply for the method that the RN200 described in one embodiment carries out signal transmission.
For OLT100, master shown in Fig. 1 in the case that optical fiber 120 is all connected with profile fiber 210-2N0,
Step 401 shown in Fig. 4, the monitoring modular in OLT100 is (including monitoring modular 106 and other unshowned monitoring moulds
Block) working condition of all receiver 1042-1048 is monitored.In step 402,107 base of control module of OLT100
The monitoring result that signal is received in receiver 1042-1048 is judged.If all receivers have received signal, control
Molding block 107 judges that trunk optical fiber 102 connects, and all profile fibers connect.Therefore, in step 403, control module
107 can be configured all photoswitch 1092-1097, place it in the position of 1-2, that is to say, that transmitter 1012-
1018 downlink signals sent out will all pass through AWG1022, and and then RN200 is transferred to by trunk optical fiber 120, and come from
The uplink signal of RN200 also all will be transferred to WDM105 by trunk optical fiber 120.
Trunk optical fiber 120 shown in Fig. 2 disconnects, in the case that profile fiber 210-2N0 is connected, Fig. 4 the step of
402, control module 107 has received the situation of signal based on not every receiver 1042-1048, step 404 after
It is continuous to judge whether that all receiver 1042-1048 are not received by signal.If it is, in step 405, the control of OLT100
Molding block 107 will be considered that trunk optical fiber 120 disconnects, and so as to judge to be configured photoswitch 1092-1098 based on this, make institute
Some photoswitches are placed in the position of 1-3, that is to say, that institute transmitter 1012-1018 will be coupled to AWG1024, and then by standby
Downlink signal is transferred to RN200 with trunk optical fiber 130, and the uplink signal for coming from RN200 also will all pass through trunk optical fiber
130 are transferred to WDM105.
In the case that trunk optical fiber 120 shown in Fig. 3 connects the disconnection of profile fiber 210, in the step 404 of Fig. 4, control
Module 107 is not received by signal based on the receiver 1042 corresponding to profile fiber 210 and other receivers all receive letter
Number situation judge that profile fiber 210 is disconnected, so as to which in step 406 control module 107 profile fiber 210 will be corresponded to
Photoswitch 1092 be placed in 1-3 positions, and other photoswitch 1094-1098 are placed in 1-2 positions.Therefore, transmitter 1012
The downlink signal sent out can be transferred to RN200 by AWG1024 and spare trunk optical fiber 130, and RN200 is received from ONU301
Uplink signal will also pass through spare trunk optical fiber 130 and be transferred to WDM105.And downlink signal that other transmitters are sent out and
Come from the uplink signal of other ONU still can be transmitted by trunk optical fiber 120.
For ONU301, in the case that trunk optical fiber 120 shown in Fig. 1 is all connected with profile fiber 210-2N0,
Step 501 shown in Fig. 5, the monitoring modular 3014 in ONU301 are monitored the working condition of receiving module 3011.Such as
Fruit judges 120 He of trunk optical fiber in step 502, the situation that control module 3015 has received signal based on receiving module 3011
Profile fiber 210 is all connection, then in step 503, control module 3015 is configured photoswitch 3016 and places it in
The position of 1-2 communicates so as to which ONU301 be made to pass through profile fiber 210.In step 505, ONU301 is to OLT100 and RN200
Report the working condition of receiving module 3011.
Trunk optical fiber 120 shown in Fig. 2 disconnects, in the case that profile fiber 210-2N0 is connected and shown in Fig. 3
Trunk optical fiber 120 connect, in the case that profile fiber 210 disconnects, the monitoring modular 3014 of ONU301 can all find to receive mould
Block 3011 is not received by signal.Therefore in step 504, control module 3015 can judge trunk optical fiber 120 based on the situation
Or profile fiber 210 disconnects, so as to which photoswitch 3016 to be arranged on to the position of 1-3, so as to which ONU301 be made to pass through spare distribution light
Fibre 212 communicates.That is, either disconnected or in trunk optical fiber 120 in the case where profile fiber 210 disconnects,
ONU301 is communicated by spare fibre 212.In step 505, ONU301 still can be received to OLT100 and RN200 reports
The working condition of module 3011.
For RN200, in the case that trunk optical fiber 120 shown in Fig. 1 is all connected with profile fiber 210-2N0,
Step 601 shown in Fig. 6, RN200 from OLT100 and ONU301 receive the working condition about receiver 1042-1048 with
And the working condition information of receiving module 3011.In step 602, the control module 203 of RN200 is based on receptions all OLT100
Machine 1042-1048 has received the situation of signal, judges that trunk optical fiber 120 is all connected with profile fiber 210-2N0.
Therefore, in step 603, control module 203 the photoswitch 2011-201N in RN200 can be arranged on 1-3 as shown in Figure 1 and
The position of 2-4, that is to say, that uplink and downlink signals can pass through such as trunk optical fiber 120, profile fiber 210 and photoswitch 2011
1-3 connections are transmitted.
Trunk optical fiber 120 shown in Fig. 2 disconnects, in the case that profile fiber 210-2N0 is connected, step shown in Fig. 6
Rapid 604, the situation that control module 203 is all not received by signal based on all receiver 1042-1048 of OLT100 is judged
Trunk optical fiber 120 is disconnected, and therefore, is set all photoswitch 2011-201N in RN200 in step 605 control module 203
In the position of 1-3 and 2-4 as shown in Figure 2, that is to say, that uplink and downlink signals can pass through for example spare trunk optical fiber 130, spare
The 2-4 of profile fiber 212 and photoswitch 2011 connections are transmitted.
Trunk optical fiber 120 shown in Fig. 3 connects, and profile fiber 210 disconnects and then the situation of other profile fibers connection
Under, the control module 203 of RN200 can be judged in step 606, the receiver 1042 of OLT100 and the receiving module of ONU301
3011 are all not received by signal, illustrate that profile fiber 210 disconnects.Also, control module 203 has also determined whether others
ONU uses identical wavelength with ONU301.If it is not, in step 607, the control module 203 of RN200 can be by all light
Switch 2011-201N is arranged on the position of 1-3 and 2-4, that is to say, that can pass through spare master for the uplink and downlink signals of ONU301
Dry optical fiber 130, the 2-4 connections of photoswitch 2011 and spare profile fiber 212 are transmitted, and for other ONU302-
The uplink and downlink signals of 30N can pass through trunk optical fiber 120, the 1-3 connections of photoswitch 2012-201N and profile fiber 220-2N0
It is transmitted.
And if in step 606 judgement the result is that such as ONU302 employs the wavelength identical with ONU301, then
Step 608, photoswitch 2012 can be arranged on the position of 1-4 and 2-3 by the control module 203 of RN200, and by other photoswitches
It is arranged on the position of 1-3 and 2-4.That is it can pass through spare trunk optical fiber 130 for the uplink and downlink signals of ONU301, light is opened
The 2-4 connections and spare profile fiber 212 for closing 2011 are transmitted；For user 302 uplink and downlink signals can pass through it is spare
Trunk optical fiber 130, the connection of the 2-3 of photoswitch 2011 and profile fiber 220 (rather than spare profile fiber 222) are passed
It is defeated；And trunk optical fiber 120, the 1- of photoswitch 2013-201N can be passed through for the uplink and downlink signals of other users equipment 303-30N
3 connections and profile fiber 230-2N0 are transmitted.
Such arrangement allows for the profile fiber 220 coupled in ONU302 and is not turned off, and should not use corresponding
Spare profile fiber 222 carries out signal transmission.But due to identical wavelength X1The profile fiber 210 of ONU301 disconnect,
Therefore the downlink signal that transmitter 1012 is sent out can only use spare trunk optical fiber 130 and spare profile fiber 210 that could pass
Transport to ONU301.And ONU301 and ONU302 is due to identical wavelength, so to share by with wavelength X1Transmitter
1012 downlink signals sent out.Therefore, there is still a need for using spare trunk optical fiber 130 to ONU302 phases for ONU302
The uplink and downlink signals answered are transmitted.In embodiments herein, RN200 employs 2 × 2 photoswitch to realize above-mentioned mesh
's.
According to one embodiment of the application, between WDM105 and circulator 110, in receiver and its phase of OLT100
Between the monitoring modular answered, it can be coupled between the WDM and its monitoring module of each ONU by coupler.
Recorded situation is only exemplary in above-described embodiment, and those skilled in the art are without departing from the application's
Under the premise of protection domain, it can deduce under different optical fiber connection situations and system structure to carrying in the application
The different settings of the TWDM-PON systems of defencive function.
Those skilled in the art are easy for learning, can change material and method within the scope of the invention.Should also
Understand, other than being used to illustrate the specific linguistic context of embodiment, the present invention provides many applicable inventive concepts.
Correspondingly, appended claims are intended to include such process, machine, manufacture, substance synthesis, device, method or step
In the range of them.
Claims (13)
1. a kind of optical line terminal for Optical Access Network, including
One or more receivers, for receiving uplink signal；
One or more transmitters, for sending downlink signal；
Two array waveguide gratings, each array waveguide grating are coupled to remotely respectively by corresponding different trunk optical fibers
Node；
One or more 1 × 2 photoswitches, for according to the trunk optical fiber and being coupled in the remote node and being used with optical-fiber network
The output terminal of each transmitter is selectively coupled to described two by the connection situation of the profile fiber between the equipment of family
One in array waveguide grating；
Wherein described optical line terminal includes two array waveguide gratings, respectively the first and second array waveguide gratings；It is described
Different trunk optical fibers include the first and second trunk optical fibers；The optical line terminal further includes monitoring module, for described one
The working condition of a or multiple receivers is monitored, and judges first trunk optical fiber and the distribution according to monitoring result
The connection situation of optical fiber, and one or more of 1 × 2 photoswitches are controlled according to judging result, so that institute
The output terminal for stating one or more transmitters is coupled to first array waveguide grating or the second array Waveguide
Grid.
2. optical line terminal as described in claim 1, wherein
When the judging result is all connected for first trunk optical fiber with the profile fiber, the monitoring module is used
It is controlled in one or more of 1x2 photoswitches, so that the output terminal coupling of one or more of transmitters
To first array waveguide grating；
When the judging result is disconnected for first trunk optical fiber, the monitoring module is used to open the 1x2 light
Row control is put into, so that the output terminal of all transmitters is couple to the second array waveguide optical grating；
When one or more in the profile fiber disconnects, the monitoring module is used for one or more of 1x2 light
Switch is controlled, so that being couple to the output terminal of the corresponding transmitter of the profile fiber of the disconnection described
The second array waveguide optical grating.
3. optical line terminal as claimed in claim 2, further includes
Wave decomposing multiplexer is coupled with the input terminal of one or more of receivers, for being demultiplexed to uplink signal；
Wavelength division multiplexer, one end are coupled with first array waveguide grating and the Wave decomposing multiplexer, the other end and institute
The coupling of the first trunk optical fiber is stated, for detaching uplink and downlink signals；
Circulator is coupled between the second array waveguide optical grating and second trunk optical fiber and is coupled in described
Between two trunk optical fibers and the wavelength division multiplexer, for the downlink signal transmission for receiving the second array waveguide optical grating
The wavelength division multiplexer is given to second trunk optical fiber and by the uplink signal transmissions received from second optical fiber.
4. optical line terminal as claimed in claim 3 further includes high power laser light generator, in the monitoring module
The lower transmitting high power laser light of control for the remote node so as to power.
5. the remote node in a kind of optical-fiber network, including
Two optical branching devices are respectively coupled to corresponding different trunk optical fibers；
One or more 2x2 photoswitches are coupled to corresponding optical-fiber network user for passing through one in two profile fibers and set
It is standby；
Control module, for controlling one or more of 2x2 photoswitches, based on the trunk optical fiber and the distribution
The connection situation of optical fiber selectively makes one that the optical-fiber network user equipment passes through in two profile fibers to be coupled to
One in described two optical branching devices.
6. remote node as claimed in claim 5, wherein the remote node equipment includes two optical branching devices, respectively the
One and second optical branching device；The trunk optical fiber include the first trunk optical fiber coupled with first optical branching device and with it is described
Second trunk optical fiber of the second optical branching device coupling；Each 2x2 photoswitches include first by two profile fibers
Or second profile fiber coupled with corresponding optical-fiber network user equipment；
The control module is used for：
When first trunk optical fiber with first profile fiber all connects every described when, the 2x2 photoswitches are controlled,
So that each optical-fiber network user equipment is coupled to first optical branching by corresponding first profile fiber
Device；
When first trunk optical fiber disconnects, the 2x2 photoswitches are controlled, so that each light net
Network user equipment is coupled to second optical branching device by corresponding second profile fiber；
When one or more first profile fiber disconnects, the 2x2 photoswitches are controlled, so that with disconnection
First profile fiber optical-fiber network user equipment is coupled to institute by corresponding second profile fiber accordingly
It states the second optical branching device and then is coupled to second trunk optical fiber.
7. remote node as claimed in claim 6, further includes
Wavelength division multiplexer is coupled between first trunk optical fiber and first optical branching device, for will from optical link end
The laser signal for power supply of end transmitting is separated from downlink signal；
Photovoltage modular converter, for by it is described from optical line terminal inject laser signal be converted into electric signal, for for
The remote node power supply.
8. remote node as claimed in claim 6, wherein controlling the 2x2 photoswitches, so that with disconnection
First profile fiber accordingly the optical-fiber network user equipment have phase co-wavelength other described optical-fiber network user equipmenies
Second optical branching device is coupled to by respective first profile fiber and then is coupled to the second trunk light
It is fine.
9. a kind of optical-fiber network user equipment, including
Receiving module, for receiving the downlink signal for coming from remote node；
Transmitting module, for sending uplink signal to the remote node；
1x2 photoswitches, for the connection situation based on profile fiber and be coupled in the remote node and optical line terminal it
Between trunk optical fiber connection situation, the user equipment is selectively coupled to by institute by one in two profile fibers
State remote node.
10. optical-fiber network user equipment as claimed in claim 9, two profile fibers include the first and second distribution light
It is fine；The remote node is coupled to the optical line terminal by the first and second trunk optical fibers；
The user equipment further includes monitoring module, is monitored for the working condition to the receiving module, and according to prison
Survey the connection situation that result judges first profile fiber；And
When first trunk optical fiber is all connected with first profile fiber, the 1x2 photoswitches are controlled, so as to
So that the optical-fiber network user equipment is coupled to the remote node by first profile fiber；
When first trunk optical fiber disconnects, the 1x2 photoswitches are controlled, so that the optical-fiber network is used
Family equipment is coupled to the remote node by second profile fiber；
When first profile fiber disconnects, the 1x2 photoswitches are controlled, so as to make the optical-fiber network user equipment
The remote node is coupled to by second profile fiber.
11. a kind of method for carrying out signal transmission by optical line terminal in optical transport network, including
Obtain the connection situation information of the first trunk optical fiber between the optical line terminal and remote node；
Obtain the connection situation information of the profile fiber between the remote node and one or more optical-fiber network user equipmenies；
The information obtained according to above-mentioned two step determine on partly or completely wavelength using first trunk optical fiber or
Second trunk optical fiber communicates with the remote node.
12. a kind of method for carrying out signal transmission in optical-fiber network user equipment, including：
Obtain the connection situation information of the first profile fiber between the optical-fiber network user equipment and remote node；
Obtain the trunk optical fiber connection situation information between the remote node and optical line terminal；
It determines to adopt according to the connection situation information of first profile fiber of acquisition and the trunk optical fiber connection situation information
It is communicated with first profile fiber or the second profile fiber.
13. a kind of method for carrying out signal transmission by remote node in optical transport network, including：
Obtain the first trunk optical fiber connection situation information between the remote node and optical line terminal and the long-range section
The first profile fiber connection situation information between point and optical-fiber network user equipment；
The remote node is configured so that in the case where first trunk optical fiber and/or first profile fiber disconnect,
The optical line terminal and the optical-fiber network user is assisted to communicate using the second trunk optical fiber and the second profile fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310405216.1A CN104426599B (en) | 2013-09-06 | 2013-09-06 | A kind of communication system for being used for time-division and wavelength division multiplexed optical network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310405216.1A CN104426599B (en) | 2013-09-06 | 2013-09-06 | A kind of communication system for being used for time-division and wavelength division multiplexed optical network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104426599A CN104426599A (en) | 2015-03-18 |
| CN104426599B true CN104426599B (en) | 2018-07-06 |
Family
ID=52974648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310405216.1A Active CN104426599B (en) | 2013-09-06 | 2013-09-06 | A kind of communication system for being used for time-division and wavelength division multiplexed optical network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104426599B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106301577B (en) * | 2015-05-15 | 2019-07-16 | 上海诺基亚贝尔股份有限公司 | Transmitter and receiver, transceiver and system for TWDM-PON |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651495A (en) * | 2009-09-25 | 2010-02-17 | 中兴通讯股份有限公司 | Method and device for protecting trunk fibers of wavelength division multiplex (WDM) passive optical network (PON) |
| CN201674613U (en) * | 2010-05-11 | 2010-12-15 | 东南大学 | Hybrid passive optical network structure with protection function |
| CN102523044A (en) * | 2011-12-22 | 2012-06-27 | 上海大学 | System for realizing network extension and protection functions with wave-division multiplexing annular optical access networks and method for realizing network extension and protection functions with wave-division multiplexing annular optical access networks |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100689503B1 (en) * | 2004-12-30 | 2007-03-02 | 삼성전자주식회사 | Wavelength division multiplexing passive optical network |
-
2013
- 2013-09-06 CN CN201310405216.1A patent/CN104426599B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651495A (en) * | 2009-09-25 | 2010-02-17 | 中兴通讯股份有限公司 | Method and device for protecting trunk fibers of wavelength division multiplex (WDM) passive optical network (PON) |
| CN201674613U (en) * | 2010-05-11 | 2010-12-15 | 东南大学 | Hybrid passive optical network structure with protection function |
| CN102523044A (en) * | 2011-12-22 | 2012-06-27 | 上海大学 | System for realizing network extension and protection functions with wave-division multiplexing annular optical access networks and method for realizing network extension and protection functions with wave-division multiplexing annular optical access networks |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104426599A (en) | 2015-03-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8275268B2 (en) | Optical transmission system and optical repeater | |
| CN102710361B (en) | A kind of distributed base station signal transmission system and communication system | |
| US9124368B2 (en) | Transceiver for use in fibre network | |
| US8861968B2 (en) | Reconfigurable optical add/drop multiplexing device for enabling totally inresistant colorless | |
| CN101848054B (en) | System and method for leading wavelength division multiplexing passive optical network to realize broadcast function with self-healing function | |
| KR20100040206A (en) | A fault localization method and a fault localization apparatus in a passive optical network and a passive optical network having the same | |
| CN102811094B (en) | Protective changeover device of wave division-time division multiplexing passive optical network system and method | |
| CN102523039B (en) | System and method for realizing same-wavelength uplink and downlink isolation and grading protection functions of colorless wavelength division multiplexing optical access network | |
| CN103199918A (en) | System and method using wavelength division multiplexing passive optical network to realize wavelength reuse and protection function | |
| CN103516431B (en) | Photoelectricity optical repeater, the long processing method away from box and its to upper and lower traveling optical signal | |
| CN110248263A (en) | Realize the three-dimensional passive optical access network system of direct communication and protection between any ONU | |
| CN107646175A (en) | A kind of optical monitoring signal device of Wave division multiplexing passive optical network | |
| CN106160840B (en) | Wave division multiplexing passive optical network optical fiber link distributed protection device and its guard method | |
| CN104836624A (en) | Centralized protection passive optical network system based on optical carrier suppression technology | |
| CN101902665A (en) | Optical line terminal, optical add-drop multiplexer and optical access system | |
| CN104426599B (en) | A kind of communication system for being used for time-division and wavelength division multiplexed optical network | |
| CN103516433B (en) | A kind of photoelectricity optical repeater, length are away from box and the processing method to upper and lower traveling optical signal | |
| CN113556183B (en) | Quantum communication system | |
| CN103916206B (en) | Double-WDM-PON network system with mutual protection mechanism and method thereof | |
| Prat et al. | Demonstration and field trial of a scalable resilient hybrid ngPON | |
| Kodama et al. | Wavelength collision-free and low-loss full-duplex transmission over switchable full-coupling or half-split coherent WDM-PON system with shared protection | |
| CN103281603B (en) | Multi-wavelength passive optical network system | |
| CN203416267U (en) | TWDM passive optical network and optical line terminal thereof | |
| CN110708118B (en) | Optical module device and optical fiber capacity expansion system | |
| CN104935377B (en) | The optical line terminal and corresponding remote node being monitored to optical network link |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 201206 Shanghai, Pudong Jinqiao Ning Bridge Road, No. 388, No. Applicant after: Shanghai NOKIA Baer Limited by Share Ltd Address before: 201206 Shanghai, Pudong Jinqiao Ning Bridge Road, No. 388, No. Applicant before: Shanghai Alcatel-Lucent Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |