CN101867411A - Method, system and device for realizing passive optical network optical fiber protection - Google Patents
Method, system and device for realizing passive optical network optical fiber protection Download PDFInfo
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Abstract
The invention discloses a method, a system and a device for realizing passive optical network optical fiber protection, wherein the method comprises the steps that two upper connection ports of each optical network unit in a pair of optical network units are respectively connected with the lower connection ports of a first optical circuit terminal and a second optical circuit terminal; each edge router connected with the first optical circuit terminal and the second optical circuit terminal bears one business, and different lower connection ports are respectively connected with the upper connection ports of the first optical circuit terminal and the second optical circuit terminal; and two links of each optical network unit, which reach the same edge router via the first optical circuit terminal and the second optical circuit terminal, are configured into two links protecting each other. The invention focuses on realizing the protection of all optical fiber links of XPON and the protection based on the business.
Description
Technical field
The present invention relates to the optical fiber access technology, relate in particular to the method, system and device of EPON (PON, Passive OpticalNetwork) fiber optic protection.
Background technology
Ethernet passive optical network is a kind of novel Optical Access Network technology, and it adopts point to multipoint configuration and passive fiber transmission, and multiple business is provided on Ethernet.It adopts the PON technology in physical layer, uses Ethernet protocol at link layer, utilizes the topological structure of PON to realize the access of Ethernet.Therefore, it combines the advantage of PON technology and ethernet technology: low cost, and high bandwidth, autgmentability is strong, and the service reorganization is quick flexibly, with existing Ethernet compatibility, convenient management or the like.
In the last few years, the userbase of Access Network constantly enlarged, and was also growing to the requirement of network broadband, and PON has satisfied the objective requirement of network development and fusion as the broadband access technology of a new generation, and is increasingly extensive in Application in Access Network.But in access network construction, the PON system is nearer far from user distance, because of various application and environment for use complexity, is easy to be subjected to the influence of ignorance factors such as urban construction, causes optical fiber link interruption accident.Therefore, an urgent demand PON system can provide optical fiber link protection scheme efficiently, when optical fiber link generation significant trouble, can switch by the professional reliably protecting of realization in the short as far as possible time.
China Telecom has proposed the model (type A, type B, Type C, type D) of several fiber optic protections in EPON V2.1 standard (agreement), the above two belong to trunk optical fibre protection, and both then belong to all-fiber protection the back.This agreement has only been done simply physical model and has been described; provide the extended operation management maintenance (OAM that simply switches; Operation Administration Maintenance) frame format definition; and do not provide concrete implementation method; and only provided on the agreement and simply switched order, the robustness and the practicality of whole protecting system have not all been done discussion further.
Simultaneously; the application of XPON (all kinds of EPON) system in power industry is also more and more; and electric power system requires higher to stability of network; electric power Ethernet PON (EPON; EthernetPON) in the standard networking mode of handing in hand has been done simple defining; each optical network unit (ONU; Optical Network Unit) hangs line feed terminals unit (FTU below; Feeder Terminal Unit) monitoring device; main website or substation connect two optical line terminal (OLT by router; Optical LineTerminal); require the EPON system to guarantee that link is unimpeded between main website or substation and the FTU; situation in the OLT fiber break can realize link protection automatically, and traffic affecting does not continue.
Can find from the applicable cases of above XPON system; what great majority protection was at present mainly paid close attention to is that OLT is to the fiber optic protection between the ONU; and OLT first line of a couplet port and link are broken down less than considering; because the upper united mouth of OLT is the interface channel of XPON system and upper layer network; it also is the part of XPON system, so also should belong to the part of XPON system protection.And present protection mostly is based on optical link, also promptly destroys when optical link, and all business on it all will pour on another protection link, and can not distinguish business, just can not carry out corresponding protection at business.
Summary of the invention
Technical problem to be solved by this invention provides the method, system and device of realizing passive optical network optical fiber protection, can carry out reliably protecting to the full optical fiber link of XPON.
In order to solve the problems of the technologies described above, the invention provides a kind of method that realizes passive optical network optical fiber protection, comprising:
Two upper united mouths of each optical network unit in a pair of optical network unit are connected with the second line of a couplet mouth of first optical line terminal and second optical line terminal respectively;
Carry a business with each edge router that first optical line terminal links to each other with second optical line terminal, and use different second line of a couplet ports to link to each other with the upper united mouth of first optical line terminal respectively with second optical line terminal;
Each optical network unit is arrived two links of two link configuration for protecting each other of same edge router through first optical line terminal and second optical line terminal.
Further,
First optical line terminal links to each other with a plurality of edge routers with second optical line terminal, and first optical line terminal is different with the upper united mouth that different edge routers are connected with second optical line terminal.
Further, this method also comprises:
Two second line of a couplet port arrangement of edge router are isolation; and two gigabit ethernet ports that two upper united mouths of each optical network unit are corresponding with exchange chip in the optical network unit are configured to isolate, subsequently with business configuration to two links of protection each other.
Further, this method also comprises:
Send the Business Stream of a plurality of business from optical network unit, each Business Stream arrives the respective edges router respectively select the stable Business Stream of the winning link establishment of competition in the link of corresponding protection each other after.
Further, this method also comprises:
When each other the protection link in a link occurs fault time, the Business Stream of corresponding service by auto switching to the protection link corresponding with the link that breaks down.
Further, if fault occurs on the link between optical line terminal and the edge router, then the Business Stream of corresponding service, is specifically comprised to the protection link corresponding with the link that breaks down by auto switching:
Edge router detects the link interruption of its second line of a couplet port, then inner exchanging chip corresponding port is set to off-state, then the address information of this port is removed automatically, Business Stream another second line of a couplet port by this edge router is descending, and the optical line terminal by respective link arrives corresponding optical network unit;
This optical network unit carries out the address learning and the migration of upper united mouth according to descending Business Stream, up Business Stream is also moved on this upper united mouth, thereby the protection of finishing Business Stream is switched.
Further, if fault occurs on the optical link between optical line terminal and the optical network unit, then the Business Stream of corresponding service, is specifically comprised to the protection link corresponding with the link that breaks down by auto switching:
Optical network unit detects the link interruption of its upper united mouth, and then the gigabit ethernet port of correspondence is set to off-state; The address information of this gigabit ethernet port is removed automatically, and Business Stream is up by another upper united mouth of this optical network unit, and arrives the respective edges router by the optical line terminal of respective link;
This edge router carries out the address learning and the migration of second line of a couplet mouth according to up Business Stream, make descending service flow transfer to this second line of a couplet mouth, thereby the protection of finishing Business Stream is switched.
In order to solve the problems of the technologies described above, the invention provides a kind of network system of realizing passive optical network optical fiber protection, comprising: a pair of optical network unit, first optical line terminal and second optical line terminal and at least one edge router, wherein:
Two upper united mouths of each optical network unit in a pair of optical network unit are connected through optical splitter with second optical line terminal second line of a couplet mouth separately with first optical line terminal respectively;
First optical line terminal is connected same edge router with second optical line terminal;
Business of each edge router carrying, and use different second line of a couplet ports to link to each other with the upper united mouth of first optical line terminal respectively with second optical line terminal;
Each optical network unit arrives the link of two link configuration for protecting each other of same edge router through first optical line terminal and second optical line terminal.
Further,
First optical line terminal links to each other with a plurality of edge routers with second optical line terminal, and first optical line terminal is different with the upper united mouth that different edge routers are connected with second optical line terminal.
Further, optical network unit also comprises two optical modules, two PON MAC modules and exchange chip except comprising two upper united mouths, wherein:
Each optical module correspondingly links to each other with a PON MAC module, the second line of a couplet mouth of each PON MAC module links to each other with two gigabit ethernet ports of described exchange chip respectively, and two gigabit ethernet ports correspondingly are connected to two upper united mouths of described optical network unit respectively; Two fast ethernet ports of exchange chip carry different business respectively.
Further,
Described two second line of a couplet port arrangement of edge router are for isolating;
Two upper united mouths of optical network unit are configured to isolate with interior two the corresponding gigabit ethernet ports of optical network unit.
Further,
When each other the protection link in a link occurs fault time, the Business Stream of corresponding service by auto switching to the protection link corresponding with the link that breaks down.
Further,
Edge router detects the link interruption of its second line of a couplet port, then inner exchanging chip corresponding port is set to off-state, then the address information of this port is removed automatically, Business Stream another second line of a couplet port by this edge router is descending, and the optical line terminal by respective link arrives corresponding optical network unit;
This optical network unit carries out the address learning and the migration of upper united mouth according to descending Business Stream, up Business Stream is also moved on this upper united mouth, thereby the protection of finishing Business Stream is switched.
Further,
Optical network unit detects the link interruption of its upper united mouth, and then the gigabit ethernet port of correspondence is set to off-state; The address information of this gigabit ethernet port is removed automatically, and Business Stream is up by another upper united mouth of this optical network unit, and arrives the respective edges router by the optical line terminal of respective link;
This edge router carries out the address learning and the migration of second line of a couplet mouth according to up Business Stream, make descending service flow transfer to this second line of a couplet mouth, thereby the protection of finishing Business Stream is switched.
In order to solve the problems of the technologies described above, the invention provides a kind of optical network unit of realizing passive optical network optical fiber protection, comprise two upper united mouths, two optical modules, two PON MAC modules and exchange chip, wherein:
Each optical module correspondingly links to each other with a PON MAC module, the second line of a couplet mouth of each PON MAC module links to each other with two gigabit ethernet ports of exchange chip respectively, and two gigabit ethernet ports correspondingly are connected to two upper united mouths of optical network unit respectively; Two fast ethernet ports of exchange chip carry different business respectively.
Further, two of exchange chip gigabit ethernet ports are configured to isolate.
Adopt method, system and device provided by the invention, compare with existing method, its starting point is in the protection of the full optical fiber link of XPON and based on the protection of business.The present invention has been owing to provide effective protection to OLT upper united mouth optical fiber link, thereby provides the effective protection model to the full optical fiber link of XPON.When working optical fibre breaks down at any link section; all can automatically business datum be transmitted from the protection light path of correspondence; because different business can be carried in a plurality of different upper united mouths of same OLT configuration; thereby use the upper united mouth of two OLT to protect each other in pairs, can realize reliably protecting based on concrete business.
Description of drawings
Fig. 1 is the structured flowchart of one embodiment of system of realization passive optical network optical fiber protection of the present invention;
Fig. 2 is the structured flowchart of another embodiment of system of realization passive optical network optical fiber protection of the present invention;
Fig. 3 is the ONU structured flowchart of realization passive optical network optical fiber protection of the present invention;
Fig. 4 is the flow chart of the method embodiment of realization passive optical network optical fiber protection of the present invention;
Fig. 5 occurs in the implementing procedure figure of OLT upper united mouth to the Business Stream auto switching of link failure between the SR among the method embodiment shown in Figure 4;
Fig. 6 occurs in the implementing procedure figure of OLT second line of a couplet mouth to the Business Stream auto switching of optical link fault between the ONU among the method embodiment shown in Figure 4.
Embodiment
Being described in detail below in conjunction with accompanying drawing and preferred embodiment to technical scheme of the present invention.The embodiment that below exemplifies only is used for description and interpretation the present invention, and does not constitute the restriction to technical solution of the present invention.
As shown in Figure 1, be the networking structure of one embodiment of system of realization passive optical network optical fiber protection provided by the invention, this embodiment describes technical scheme of the present invention at the model of two business of each link bearer.
System embodiment shown in Figure 1 comprises: two optical links that two ONU (ONU1 and ONU2) and two OLT (OLT1 and OLT2) constitute and the edge router (SR1 and SR2) that carries two different business (professional 1 and professional 2), wherein:
OLT1 by its second line of a couplet mouth PON1-D through corresponding optical splitter (i.e. the blockage at PON1-D place among the figure, its splitting ratio is 1: N) tell two-way optical fiber, link to each other with the upper united mouth PONC1-U of ONU1 and the upper united mouth PONC2-U of ONU2 respectively; (blockage at PON2-D place among the figure, its splitting ratio are 1 to OLT2: N) tell two-way optical fiber, link to each other with the upper united mouth POND1-U of ONU1 and the upper united mouth POND2-U of ONU2 respectively through corresponding optical splitter by its second line of a couplet mouth PON2-D; Connect professional main website 1 and carry professional 1 the SR1 port A1 by two second line of a couplet and link to each other with the upper united mouth PONA1-U of OLT1 and the upper united mouth PONA2-U of OLT2 respectively with port B1; Connect professional main website 2 and carry professional 2 the SR2 port A2 by two second line of a couplet and link to each other with another upper united mouth PONB1-U of OLT1 and another upper united mouth PONB2-U of OLT2 respectively with port B3.
In said system embodiment; between SR1 and the ONU1 respectively two links by OLT1 and OLT2 form the links of protection each other; between SR2 and the ONU2 respectively two links by OLT2 and OLT1 form the links of protection each other; both realized effective protection, also realized effective protection the optical fiber link below the OLT second line of a couplet mouth to the link more than the OLT upper united mouth.
On OLT1 and OLT2, respectively each ONU (ONU1 and ONU2) is registered and disposes as independent O NU.
SR must isolate with the port of two second lines of a couplet that two OLT link to each other, and makes not allow to be forwarded to another one OLT by SR from a up traffic data of OLT.
Subsequently with business configuration to the link of protection each other, make professional 1 can arrive professional main website 1 from the upper united mouth of OLT1 and OLT2 by ONU1 or ONU2, professional 2 can arrive professional main website 2 from the upper united mouth of OLT1 and OLT2 by ONU1 or ONU2.
The link of two protections each other that form by two OLT between each ONU and each SR is in all conductings just often, and Business Stream is in race condition in the above, and can select to compete a winning link as service aisle.
Because two upper united mouths on an OLT are by the different different business of SR carrying, port is protected in two pairs of upper united mouths formation on two OLT each other, can realize the protection based on concrete business (being carried on different upper united mouths on the OLT by SR).When breaking down in the link in the link of protection each other, professional 1 or professional 2 Business Stream auto switching is to the protection link of correspondence.
System embodiment shown in Figure 1 is to describe at the model of two business of a link bearer, in fact, article one, link can carry a plurality of different business, only needs the SR that increases the upper united mouth of respective number and dispose respective number on corresponding OLT to get final product, as shown in Figure 2.
In the system embodiment of Fig. 1 or realization passive optical network optical fiber protection shown in Figure 2; the internal structure of ONU as shown in Figure 3; adopt the two optical modules and the mode of two PON MAC chips (also can be described as the PONMAC module) that Business Stream is protected; be that optical module 1 links to each other with PON MAC chip 2 with corresponding PON MAC chip 1 respectively with optical module 2; the second line of a couplet mouth of each PON MAC chip is connected respectively to two gigabit Ethernet (GE of exchange chip; Gigabit Ethernet) port (is called for short the GE mouth; be GE1 mouth and GE2 mouth) on; two Fast Ethernet (FE of exchange chip; FastEthernet) port (is called for short the FE mouth; be FE1 mouth and FE2 mouth) carry two different business (i.e. business 1 and professional 2) respectively, can realize of the protection of ONU inside like this to different business stream.
The GE1 mouth (linking to each other with the upper united mouth of ONU) of the exchange chip in the ONU will be isolated with GE2 mouth (linking to each other with another upper united mouth of ONU), and the feasible traffic data that goes downwards to a upper united mouth of corresponding ONU from an OLT can not be up to another one OLT by another upper united mouth of this ONU.
Exchange chip is finished the protection of Business Stream as the upper united mouth by one (GE1 mouth or GE2 mouth) in two GE mouths of selection.When a link occurs fault, Business Stream can be finished the forwarding of business datum from another GE mouth.
Fault may occur in OLT to the optical link between the ONU, also may occur in the OLT upper united mouth to the link between the SR.
When fault occurs in the OLT upper united mouth to the link between the SR:
For example, professional 1 Business Stream under normal circumstances is to arrive SR1 from OUN1 by OLT1.Detect the link interruption of its second line of a couplet port A1 as SR1, then its inner exchanging chip corresponding port (not shown) is set to disconnect (down) state, then the mac address information of this port is removed automatically, professional 1 Business Stream is descending by another second line of a couplet port B1 of SR1, and arrives OUN1 by OLT2;
The exchange chip of ONU1 carries out MAC address learning and the migration of upper united mouth POND1-U according to professional 1 descending Business Stream, up Business Stream is also moved on the POND1-U of this upper united mouth, thereby the protection of finishing Business Stream is switched.
When fault occurs in OLT to the optical link between the ONU:
For example, professional 1 Business Stream under normal circumstances is to arrive SR1 from OUN1 by OLT1.When ONU1 detects the link interruption of its upper united mouth PONC1-U, then corresponding GE1 mouth is set to the down state on its inner exchanging chip; The mac address information of this GE1 mouth is removed automatically, and then professional 1 Business Stream is just up by another upper united mouth POND1-U of ONU1, and arrives SR1 by OLT2;
The exchange chip of SR1 (not showing among Fig. 1) carries out MAC address learning and the migration of second line of a couplet port B1 according to up Business Stream, and its descending Business Stream is also moved on this second line of a couplet port B1, and arrives ONU1 by OLT2, thereby the protection of finishing Business Stream is switched.
The present invention is directed to said system embodiment, the method embodiment that realizes passive optical network optical fiber protection also correspondingly is provided, its flow process comprises the steps: as shown in Figure 4
110: set up protecting network, two upper united mouths that are each ONU configuration among the pair of O NU are connected through optical splitter with OLT2 second line of a couplet mouth separately with OLT1 respectively, and OLT1 links to each other with two second line of a couplet ports of the SR that carries a business respectively with an OLT2 upper united mouth separately; Each ONU forms the link of protection each other through link and this ONU that OLT1 arrives SR through the link that OLT2 arrives SR;
OLT1 links to each other with two second line of a couplet ports of another professional SR of carrying respectively with OLT2 another upper united mouth separately, as shown in Figure 1.
Certainly, OLT1 and OLT2 a plurality of upper united mouths separately can be respectively link to each other with two second line of a couplet ports of each SR of a plurality of SR of carrying different business, as shown in Figure 2.
On two OLT (OLT1 and OLT2), respectively each ONU (ONU1 and ONU2) is registered and disposes as independent O NU.
120: the second line of a couplet port arrangement that each SR is linked to each other with each OLT is for isolating, and two GE mouths of exchange chip in each ONU are configured to isolate, subsequently with business configuration to two links of protection each other;
The second line of a couplet port arrangement that SR is linked to each other with OLT is isolation, is not allow to be forwarded to another one OLT by SR from a up traffic data of OLT in order to make.
The GE1 mouth of exchange chip in the ONU and GE2 mouth are configured to isolate, and are in order to make the traffic data that goes downwards to the upper united mouth of corresponding ONU from an OLT not to be up to another one OLT by another upper united mouth of this ONU.
To two links of protection each other, for example make professional 1 can arrive professional main website 1 from the upper united mouth of OLT1 and OLT2 by ONU1 or ONU2 business configuration, professional 2 can arrive professional main website 2 from the upper united mouth of OLT1 and OLT2 by ONU1 or ONU2.
130: send the Business Stream of different business from ONU, each Business Stream arrives the corresponding business main website respectively after selecting winning one of competition to set up stable Business Stream on two links of protection each other;
For example from sending professional 1 and professional 2 Business Stream, each Business Stream arrives corresponding SR respectively, thereby has arrived the corresponding business main website after selecting winning one of competition to set up stable Business Stream on the links of two protections each other.
140: in a link in the link of protection each other when breaking down, the Business Stream of corresponding service by auto switching to the protection link of correspondence.
The implementing procedure that carries out the Business Stream auto switching when the fault shown in Fig. 4 occurs on the link of OLT upper united mouth between SR comprises the steps: as shown in Figure 5
1401a: the link interruption that detects one second line of a couplet port as SR, then its inner exchanging chip corresponding port is set to off-state, then the mac address information of this port is removed automatically, the Business Stream of corresponding service is descending by another second line of a couplet port of this SR, by the OLT arrival ONU of respective link;
1402a:ONU carries out the MAC address learning and the migration of upper united mouth according to descending Business Stream, up Business Stream is also moved on this upper united mouth, thereby the protection of finishing Business Stream is switched.
The implementing procedure that carries out the Business Stream auto switching when the fault shown in Fig. 4 occurs on the optical link of OLT between ONU comprises the steps: as shown in Figure 6
1401b:ONU detects the link interruption of one upper united mouth, and then the GE mouth of its inner exchanging chip correspondence is set to off-state; The mac address information of this GE mouth is removed automatically, and Business Stream is up by another upper united mouth of this ONU, and arrives SR by the OLT of respective link;
1402b:SR carries out the MAC address learning and the migration of second line of a couplet mouth according to up Business Stream, make descending service flow transfer to this second line of a couplet mouth, thereby the protection of finishing Business Stream is switched.
Above method embodiment, owing to provide simultaneously occurring in the OLT upper united mouth to link failure between the SR with occur in OLT second line of a couplet mouth and switch to the protection of optical link fault between the ONU, thereby the reliably protecting to the full optical fiber link of XPON is provided.And; no matter be for occurring in the fault of OLT upper united mouth to link between the SR; still for occurring in the fault of OLT to optical link between the ONU; because the different business of upper united mouth carrying that same OLT is different; so link switchover is just at a business but not at all business, thereby realization is based on the fiber optic protection of business.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to finish by program, described program can be stored in the computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each module in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (16)
1. method that realizes passive optical network optical fiber protection comprises:
Two upper united mouths of each optical network unit in a pair of optical network unit are connected with the second line of a couplet mouth of first optical line terminal and second optical line terminal respectively;
Carry a business with each edge router that first optical line terminal links to each other with second optical line terminal, and use different second line of a couplet ports to link to each other with the upper united mouth of first optical line terminal respectively with second optical line terminal;
Each optical network unit is arrived two links of two link configuration for protecting each other of same edge router through first optical line terminal and second optical line terminal.
2. in accordance with the method for claim 1, it is characterized in that,
First optical line terminal links to each other with a plurality of edge routers with second optical line terminal, and first optical line terminal is different with the upper united mouth that different edge routers are connected with second optical line terminal.
3. according to claim 1 or 2 described methods, it is characterized in that, also comprise:
Described two second line of a couplet port arrangement of described edge router are isolation; and two gigabit ethernet ports that two upper united mouths of each optical network unit are corresponding with exchange chip in the described optical network unit are configured to isolate, subsequently with business configuration to two links of protection each other.
4. in accordance with the method for claim 3, it is characterized in that, also comprise:
Send the Business Stream of a plurality of business from described optical network unit, each Business Stream arrives the respective edges router respectively select the stable Business Stream of the winning link establishment of competition in the link of corresponding protection each other after.
5. in accordance with the method for claim 4, it is characterized in that, also comprise:
When described each other the protection link in a link occurs fault time, the Business Stream of corresponding service by auto switching to the protection link corresponding with the link that breaks down.
6. in accordance with the method for claim 5; it is characterized in that; if described fault occurs on the link between described optical line terminal and the described edge router, then the Business Stream of described corresponding service, is specifically comprised to the protection link corresponding with the link that breaks down by auto switching:
Described edge router detects the link interruption of its second line of a couplet port, then inner exchanging chip corresponding port is set to off-state, then the address information of this port is removed automatically, described Business Stream another second line of a couplet port by this edge router is descending, and the optical line terminal by respective link arrives corresponding optical network unit;
This optical network unit carries out the address learning and the migration of upper united mouth according to descending Business Stream, up Business Stream is also moved on this upper united mouth, thereby the protection of finishing Business Stream is switched.
7. in accordance with the method for claim 3; it is characterized in that; if described fault occurs on the optical link between described optical line terminal and the described optical network unit, then the Business Stream of described corresponding service, is specifically comprised to the protection link corresponding with the link that breaks down by auto switching:
Described optical network unit detects the link interruption of its upper united mouth, and then the described gigabit ethernet port of correspondence is set to off-state; The address information of this gigabit ethernet port is removed automatically, and described Business Stream is up by another upper united mouth of this optical network unit, and arrives the respective edges router by the optical line terminal of respective link;
This edge router carries out the address learning and the migration of second line of a couplet mouth according to up Business Stream, make descending service flow transfer to this second line of a couplet mouth, thereby the protection of finishing Business Stream is switched.
8. network system of realizing passive optical network optical fiber protection comprises: a pair of optical network unit, first optical line terminal and second optical line terminal and at least one edge router, wherein:
Two upper united mouths of each optical network unit in the described a pair of optical network unit are connected through optical splitter with second optical line terminal second line of a couplet mouth separately with first optical line terminal respectively;
Described first optical line terminal is connected same edge router with second optical line terminal;
Business of each edge router carrying, and use different second line of a couplet ports to link to each other with the upper united mouth of first optical line terminal respectively with second optical line terminal;
Each optical network unit arrives the link of two link configuration for protecting each other of same edge router through first optical line terminal and second optical line terminal.
9. according to the described network system of claim 8, it is characterized in that,
First optical line terminal links to each other with a plurality of edge routers with second optical line terminal, and first optical line terminal is different with the upper united mouth that different edge routers are connected with second optical line terminal.
10. according to claim 8 or 9 described network systems, it is characterized in that described optical network unit also comprises two optical modules, two PON MAC modules and exchange chip except comprising two upper united mouths, wherein:
Each optical module correspondingly links to each other with a PON MAC module, the second line of a couplet mouth of each PON MAC module links to each other with two gigabit ethernet ports of described exchange chip respectively, and described two gigabit ethernet ports correspondingly are connected to two upper united mouths of described optical network unit respectively; Two fast ethernet ports of described exchange chip carry different business respectively.
11. according to the described network system of claim 10, it is characterized in that,
Described two second line of a couplet port arrangement of described edge router are for isolating;
Two upper united mouths of described optical network unit are configured to isolate with interior corresponding described two gigabit ethernet ports of described optical network unit.
12. according to the described network system of claim 11, it is characterized in that,
When described each other the protection link in a link occurs fault time, the Business Stream of corresponding service by auto switching to the protection link corresponding with the link that breaks down.
13. according to the described network system of claim 12, it is characterized in that,
Described edge router detects the link interruption of its second line of a couplet port, then inner exchanging chip corresponding port is set to off-state, then the address information of this port is removed automatically, described Business Stream another second line of a couplet port by this edge router is descending, and the optical line terminal by respective link arrives corresponding optical network unit;
This optical network unit carries out the address learning and the migration of upper united mouth according to descending Business Stream, up Business Stream is also moved on this upper united mouth, thereby the protection of finishing Business Stream is switched.
14. according to the described network system of claim 12, it is characterized in that,
Described optical network unit detects the link interruption of its upper united mouth, and then the described gigabit ethernet port of correspondence is set to off-state; The address information of this gigabit ethernet port is removed automatically, and described Business Stream is up by another upper united mouth of this optical network unit, and arrives the respective edges router by the optical line terminal of respective link;
This edge router carries out the address learning and the migration of second line of a couplet mouth according to up Business Stream, make descending service flow transfer to this second line of a couplet mouth, thereby the protection of finishing Business Stream is switched.
15. an optical network unit of realizing passive optical network optical fiber protection comprises two upper united mouths, two optical modules, two PON MAC modules and exchange chip, wherein:
Each optical module correspondingly links to each other with a PON MAC module, the second line of a couplet mouth of each PON MAC module links to each other with two gigabit ethernet ports of described exchange chip respectively, and described two gigabit ethernet ports correspondingly are connected to two upper united mouths of described optical network unit respectively; Two fast ethernet ports of described exchange chip carry different business respectively.
16., it is characterized in that two gigabit ethernet ports of described exchange chip are configured to isolate according to the described optical network unit of claim 15.
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| CN201010203701.7A CN101867411B (en) | 2010-06-17 | 2010-06-17 | Realize the method, system and device of passive optical network optical fiber protection |
| PCT/CN2010/077924 WO2011157021A1 (en) | 2010-06-17 | 2010-10-20 | Method, system and device for implementing passive optical network fiber protection |
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| CN101867411B (en) | 2016-04-13 |
| WO2011157021A1 (en) | 2011-12-22 |
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