CN102130718B - A kind of network element device of protection switching of backbone optical path and method - Google Patents
A kind of network element device of protection switching of backbone optical path and method Download PDFInfo
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- CN102130718B CN102130718B CN201010002845.6A CN201010002845A CN102130718B CN 102130718 B CN102130718 B CN 102130718B CN 201010002845 A CN201010002845 A CN 201010002845A CN 102130718 B CN102130718 B CN 102130718B
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Abstract
The invention provides a kind of network element device and method of protection switching of backbone optical path, the method comprises: for network element device creates protection group, described protection group comprises protection EPON (PON) mouth and multiple work PON mouth; When carrying out pretection switch, protected to described the light path that PON mouth is corresponding with it by the work PON mouth optical path switching switched by described protection group.Adopt technical scheme of the present invention, can be the redundancy protecting that light path provides 1:N, dramatically saves on operation cost.
Description
Technical field
The present invention relates to the pretection switch technology of EPON (PON) system, particularly relate to a kind of network element device and method of protection switching of backbone optical path.
Background technology
Passive optical network PON (Passive Optical Network) technology is a kind of intelligent acess technology.It adopts the network topology structure of point-to-multipoint, and passive fiber transmits.PON system is a kind of extensively being had an optimistic view of and the current broadband access technology also having sizable application.PON system wants to substitute original access device completely, needs the economy providing more reliable business and Geng Gao.
Current PON system mainly contains four kinds of pretection switch modes at present for guaranteeing its reliability:
Type A protects, and trunk optical fibre protection, as shown in Figure 1a, can protect trunk optical fiber, by OLT (optical line terminal, optical fiber cable termination equipment) hardware complete independently.
Type B is protected, and trunk optical fiber and OLT side redundancy protecting, as shown in Figure 1 b, protect trunk optical fiber and OLT interface
Type C is protected, the whole redundancy protecting in OLT side and ONU side, as illustrated in figure 1 c,
Type D protects, the whole redundancy protecting in OLT side, as illustrated in figure 1 c, and ONU side part redundancy protecting.
All these protected modes are above all 1:1 redundancy protectings, i.e. a corresponding work PON mouth of protection PON mouth, and the price comparison of EPON OLT device is expensive, and operation cost is higher.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of network element device and method of protection switching of backbone optical path, can be the redundancy protecting that light path provides 1:N, dramatically saves on operation cost.
In order to solve the problem, the invention provides a kind of method of protection switching of backbone optical path, comprising: for network element device creates protection group, described protection group comprises protection EPON (PON) mouth and multiple work PON mouth; When carrying out pretection switch, protected to described the light path that PON mouth is corresponding with it by the work PON mouth optical path switching switched by described protection group.
Further, the master control borad of described network element device is that network element device creates protection group, comprise the index relative correspondence table and PON mouth state table of setting up protection group, this index relative correspondence table comprises protection group sequence number, protection group title, protection PON stomochord draws and the PON stomochord that works draws;
After described master control borad creates protection group, send to each work PON mouth place PON OLT line card and create protection group message, wherein carry the state information of the work PON mouth that protection group index relative correspondence is shown and this line card comprises, PON OLT line card transmission also to protection PON mouth place creates protection group message, wherein carries the data that protection group index relative correspondence is shown and protection PON mouth need be synchronous;
After described work PON mouth place PON OLT line card receives and creates protection group message, notice work PON mouth is in protection group, and opens the optical module switch of work PON mouth;
After described protection PON mouth place PON OLT line card receives and creates protection group message, close the optical module switch of protection PON mouth, and need synchronous data to be sent to protection PON mouth in protection PON mouth.
Further, when carrying out Forced Switch, the master control borad of described network element device, to protection PON mouth place PON OLT line card and the instruction being sent Forced Switch by the work PON mouth place PON OLT line card switched, carries the work PON stomochord that need switch and draws;
PON OLT line card draws according to described work PON stomochord and judges that whether protection PON mouth is at this line card, check the current state of protection PON mouth, if protection PON mouth is state for subsequent use, open the optical module of protection PON mouth, and light path is switched to by light path corresponding to the work PON mouth light path of switching, run by the data of the work PON mouth switched, and the current state of protection PON mouth is set to operating conditions, if protection PON mouth is operating conditions, close the optical module of protection PON mouth, and the current state of protection PON mouth is set to state for subsequent use;
Whether PON OLT line card also draws according to described work PON stomochord and judges by the work PON mouth switched at this line card, check the current state of this work PON mouth, if work PON mouth is operating conditions, close by the optical module of the work PON mouth switched, and be set to state for subsequent use by by the current state of switching work PON mouth, if work PON mouth is state for subsequent use, open by the optical module of the work PON mouth switched.
Further, after the PON OLT line card of described network element device detects that the work PON mouth of this line card breaks down, notice master control borad work PON mouth breaks down, carry described work PON stomochord to draw, master control borad draws according to described work PON stomochord and judges whether this work PON mouth is in protection group, judge whether the protection PON mouth of this protection group is state for subsequent use further, that send pretection switch message to protection PON mouth place PON OLT line card and by the work PON mouth place PON OLT line card switched, the work PON stomochord carried by switching draws;
PON OLT line card draws according to described work PON stomochord and judges that whether protection PON mouth is at this line card, indicate the optical module opening protection PON mouth, and light path is switched to by light path corresponding to the work PON mouth light path of switching, run by the data of the work PON mouth switched, and the current state of protection PON mouth is set to operating conditions;
PON OLT line card also draws to judge by the work PON mouth switched it whether at this line card, is close described by the optical module of work PON mouth switched, and be set to state for subsequent use by by the current state of switching work PON mouth according to described work PON stomochord.
Further, described protection PON stomochord draws and the PON stomochord that works draws and adopts slot number and PON port numbers common ID.
Further, described protection PON mouth needs synchronous data to comprise, and flag bit identifies whether this PON mouth is in protection group, the Backup Data table of protection group sequence number, PON mouth current state and all working PON mouth.
A network element device for protection switching of backbone optical path, described network element device comprises master control borad and one or more EPON optical fiber cable termination equipment (PON OLT) line card;
Described master control borad, for creating protection group for network element device; And when needing to indicate the protection PON mouth in described protection group to run by the data of the work PON mouth switched when carrying out pretection switch; The described protection group created comprises a protection PON mouth and multiple work PON mouth;
Described PON OLT line card, carries out pretection switch for the instruction according to described master control borad, is protected the light path that PON mouth is corresponding with it by described protection group by the work PON mouth optical path switching switched to described.
Further, described master control borad comprises master control conservation treatment module;
Described master control conservation treatment module, protection group is created for the instruction according to the establishment protection group received, comprise the index relative correspondence table creating protection group, the index relative correspondence of described protection group shows to comprise protection group sequence number, protection group title, protection PON stomochord draws and the PON stomochord that works draws;
Described master control conservation treatment module also creates protection group message for sending to protection PON mouth place line card, wherein carry the protection group information of establishment and protection PON mouth to need synchronous data to send to work PON mouth place line card to create protection group message, wherein carry the state information of the work PON mouth that the protection group information of establishment and this line card comprise;
Described PON OLT line card comprises line card conservation treatment module and optical switch control module;
Described line card conservation treatment module, for receiving the establishment protection group message that master control borad issues, when the protection PON mouth in the protection group created is the PON mouth of this line card, by data syn-chronization synchronous for the need wherein carried to protection PON mouth, and notify that optical switch control module closes the optical module of protection PON mouth, when the work PON mouth in the protection group created comprises the PON mouth of this line card, notice optical switch control module opens the optical module of work PON mouth, and this protection group sequence number, work PON mouth current state are sent to work PON mouth;
Described optical switch control module, for closing the optical module of protection PON mouth according to described notice, and opens the optical module of work PON mouth.
Further, described master control borad also comprises OAMAgent module, instruction for the Forced Switch by reception is forwarded to master control conservation treatment module, wherein carries the sequence number of the protection group that need switch and/or title, direction that the work PON stomochord that need switch draws and switches;
Described master control conservation treatment module also for receive Forced Switch instruction after to protection PON mouth place PON OLT line card and switched work PON mouth place PON OLT line card and send the instruction of Forced Switch, carry the work PON stomochord that need switch and draw;
Described line card conservation treatment module also for receive Forced Switch instruction after, draw according to work PON stomochord wherein and judge that whether the work PON mouth that need switch is at this line card, notify that line card Service Processing Module carries out pretection switch, wherein indicate the work PON stomochord that need switch to draw, line card conservation treatment module also checks the current state of the work PON mouth that need switch, if operating conditions then notifies the optical module of optical switch control module closedown work PON mouth, if state for subsequent use then notifies that optical switch control module opens the optical module of work PON mouth, the work PON stomochord wherein indicated by switching draws,
For drawing according to work PON stomochord, line card conservation treatment module also judges that whether its protection PON mouth is at this line card, notify that line card Service Processing Module carries out pretection switch, the work PON stomochord wherein indicated by switching draws, and notice optical switch control module opens the optical module of protection PON mouth when protecting PON mouth to be state for subsequent use, when protecting PON mouth to be operating conditions, notice optical switch control module closes the optical module of protection PON mouth;
Described line card Service Processing Module is for receiving the notice of carrying out pretection switch, when by the work PON mouth switched at this line card time, switch the current state of this work PON mouth, when protecting PON mouth at this line card, the current state of switch protecting PON mouth, and instruction protection PON mouth runs by the data of the work PON mouth switched when protecting PON mouth to be switched to operating conditions by state for subsequent use;
Described optical switch control module also for receive the optical module of opening/closing protection PON mouth notice after the optical module of opening/closing protection PON mouth, and receive opening/closing work PON mouth optical module notice after the optical module of opening/closing work PON mouth.
Further, described master control borad also comprises PON Service Processing Module;
Line card Service Processing Module also notifies that master control borad work PON mouth breaks down for detecting after work PON mouth breaks down, and wherein carries this work PON stomochord and draws;
Described PON Service Processing Module also for receive work PON mouth fault notice after send the fault warning of PON mouth to control conservation treatment module, wherein carry the work PON stomochord broken down and draw;
For drawing according to work PON stomochord, described master control conservation treatment module also judges whether this work PON mouth is in protection group, judge whether the protection PON mouth of this protection group is state for subsequent use further, send pretection switch message to protecting PON mouth place PON OLT line card and being switched work PON mouth place PON OLT line card, wherein carry the work PON stomochord broken down and draw;
Described line card conservation treatment module is also for after receiving pretection switch message, draw according to described work PON stomochord and judge that whether protection PON mouth is at this line card, be notify that line card Service Processing Module carries out pretection switch, wherein indicate and to be regarded it as by the work PON stomochord switched and notify that optical switch control module opens the optical module of described protection PON mouth; Also to judge by the work PON mouth switched it whether at this line card, is notify that optical switch control module is closed described by the optical module of work PON mouth switched for drawing according to described work PON stomochord;
Described line card Service Processing Module is also for receiving the notice of carrying out pretection switch, protect PON mouth to run by the data of the work PON mouth switched described in instruction when protecting PON mouth at this line card, and the current state of protection PON mouth is set to operating conditions, when by the work PON mouth switched at this line card time be set to state for subsequent use by by the current state of work PON mouth of switching;
Described optical switch control module is also described by the optical module of work PON mouth switched for closing according to described notice, opens the optical module of described protection PON mouth.
Further, described protection PON stomochord draws and the PON stomochord that works draws and adopts slot number and PON port numbers common ID.
The invention provides a kind of network element device and method of protection switching of backbone optical path, owing to have employed the protected mode of 1:N, save OLT PON mouth resource, saved the operation cost of operator, add the economic and practical that PON accesses resist technology.
Accompanying drawing explanation
Fig. 1 a to Fig. 1 d is the networking diagram of 1:1 redundancy protecting in prior art;
Fig. 2 is the networking diagram of 1:N pretection switch of the present invention;
Fig. 3 is present system structural representation;
Fig. 4 is the inventive method protection group visioning procedure figure;
Fig. 5 is the flow chart that the present invention realizes mandatory protection and switches;
Fig. 6 realizes the flow chart of pretection switch when being working hole fault of the present invention.
Embodiment
The present embodiment provides a kind of network element device of protection switching of backbone optical path, and as shown in Figure 3, network element device comprises a master control borad and one or more line card;
Master control borad comprises OAMAgent module, master control conservation treatment module and PON Service Processing Module;
OAMAgent module, the instruction for the establishment protection group sent by webmaster is forwarded to conservation treatment module; The instruction of this establishment protection group comprise need create protection group sequence number, protection group title, protection PON stomochord draws and the PON stomochord that works draws; The protection group created comprises a protection PON mouth and multiple work PON mouth, protection PON mouth has the Backup lightpath consistent with work PON mouth quantity, and every bar Backup lightpath and working light path one_to_one corresponding.
OAMAgent module is also forwarded to conservation treatment module for the instruction of the deletion protection group sent by webmaster; The instruction of this deletion protection group comprises sequence number and/or the title of the protection group that need delete;
OAMAgent module is also forwarded to conservation treatment module for the instruction of the Forced Switch sent by webmaster, the direction (working hole is switched to protection mouth or protects mouth to switch to working hole) that the instruction of this Forced Switch comprises the sequence number of the protection group that need switch and/or title, the work PON stomochord that need switch draws and switches.
Master control conservation treatment module, protection group is created for the instruction according to the establishment protection group received, comprise the index relative correspondence table and PON mouth state table of setting up protection group, the index relative correspondence of protection group shows to comprise protection group sequence number, protection group title, protection PON stomochord draws and the PON stomochord that works draws; Wherein, PON stomochord is protected to draw and the PON stomochord that works draws and can adopt slot number and PON port numbers common ID;
Master control conservation treatment module also needs synchronous data for obtaining protection PON mouth from PON Service Processing Module; And send establishment protection group message to protection PON mouth place line card; the protection group sequence number and the protection PON mouth that wherein carry establishment need synchronous data; also creating protection group message for sending to work PON mouth place line card, wherein carrying the protection group sequence number of establishment, the work PON stomochord of this line card protection draws and the PON mouth state that works.Protection PON mouth needs synchronous data to comprise: the ONU service data that the data that user configures at work PON mouth, the configuration data of ONU, work PON mouth are online, and ONU service data comprises the LLID of ONU, the state etc. of ONU MAC and ONU;
Master control conservation treatment module is also for receiving the PON mouth fault warning of PON Service Processing Module, and judge this PON mouth whether in protection group, and whether can carry out switching (if protection PON mouth current be state for subsequent use; could switch, if protection PON mouth is current is operating conditions, cannot switch), if can switch, send pretection switch message to protecting PON mouth place PON OLT line card and being switched work PON mouth place PON OLT line card, wherein carry the work PON stomochord broken down and draw;
Master control conservation treatment module can also be used for providing interface to PON Service Processing Module, for inquiring about PON mouth whether in protection group.
To protection PON mouth place PON OLT line card and switched work PON mouth place PON OLT line card and send the instruction of Forced Switch when master control conservation treatment module is also legal for the instruction of the Forced Switch received, the work PON stomochord wherein at least carried by switching draws.
PON Service Processing Module, for preserving the data of normal PON Business Processing;
PON Service Processing Module also for receive work PON mouth fault notice after, send the fault warning of PON mouth to master control conservation treatment module, wherein carry the work PON stomochord broken down and draw.
Line card comprises line card Service Processing Module, line card conservation treatment module and optical switch control module;
Line card conservation treatment module; for receiving the establishment protection group message that master control borad issues; when the protection PON mouth in the protection group created is the PON mouth of this line card; by data syn-chronization synchronous for the need wherein carried to protection PON mouth; and notify that optical switch control module closes the optical module of protection PON mouth; when the work PON mouth in the protection group created comprises the PON mouth of this line card; notice optical switch control module opens the optical module of work PON mouth, and this protection group sequence number, work PON mouth current state are sent to work PON mouth.
Line card conservation treatment module is also for after receiving pretection switch message, draw according to work PON stomochord and judge that whether protection PON mouth is at this line card, be notify that line card Service Processing Module carries out pretection switch, wherein indicate and to be regarded it as by the work PON stomochord switched and notify that optical switch control module opens the optical module of protection PON mouth; Also to judge by the work PON mouth switched it whether at this line card, is notify that the closedown of optical switch control module is by the optical module of work PON mouth switched for drawing according to work PON stomochord;
Line card conservation treatment module also for receive Forced Switch instruction after, draw according to work PON stomochord wherein and judge that whether the work PON mouth that need switch is at this line card, notify that line card Service Processing Module carries out pretection switch, wherein indicate the work PON stomochord that need switch to draw, line card conservation treatment module also checks the current state of the work PON mouth that need switch, if operating conditions then notifies the optical module of optical switch control module closedown work PON mouth, if state for subsequent use then notifies that optical switch control module opens the optical module of work PON mouth, the work PON stomochord wherein indicated by switching draws, for drawing according to work PON stomochord, line card conservation treatment module also judges that whether its protection PON mouth is at this line card, notify that line card Service Processing Module carries out pretection switch, the work PON stomochord wherein indicated by switching draws, and notice optical switch control module opens the optical module of protection PON mouth when protecting PON mouth to be state for subsequent use, when protecting PON mouth to be operating conditions, notice optical switch control module closes the optical module of protection PON mouth.
Line card Service Processing Module; for receiving the notice of carrying out pretection switch; when by the work PON mouth switched at this line card time; switch the current state of this work PON mouth; when protecting PON mouth at this line card; the current state of switch protecting PON mouth, and instruction protection PON mouth runs by the data of the work PON mouth switched when protecting PON mouth to be switched to operating conditions by state for subsequent use.
Line card Service Processing Module also notifies that master control borad work PON mouth breaks down for detecting after work PON mouth breaks down, and wherein carries this work PON stomochord and draws;
Optical switch control module, for the notice sent according to line card conservation treatment module, closes or opens the optical module of protection PON mouth, and open or close the optical module of work PON mouth.
Fig. 4 describes handling process when the inventive method protection group creates.As shown in the drawing, comprise the following steps:
Step 401: for network element device creates protection group, system carries out validity decision, just starts to create protection group if legal, sets up index relative correspondence table and the PON mouth state table of protection group.
The protection group index relative correspondence table set up generally comprises protection group sequence number, protection group title, protection PON stomochord draws and the PON stomochord that works draws; Wherein, the data type structure of PON mouth mark be slot number, PON port numbers (namely protect PON stomochord to draw and the PON stomochord that works draw can adopt slot number and PON port numbers common ID); As shown in table 1; protection group sequence number be protect PON mouth in the protection group of 1 be designated ponIndex1; the slot number of its correspondence is 2, PON port numbers is 1; the PON mouth that works in this protection group is ponIndex2 and ponIndex3; the slot number that ponIndex2 is corresponding is 2; PON port numbers is slot number that 2, ponIndex3 is corresponding be 1, PON port numbers is 1.
The protection group created comprises a protection PON mouth and multiple work PON mouth, protection PON mouth has the Backup lightpath consistent with work PON mouth quantity, and every bar Backup lightpath and working light path one_to_one corresponding.
The PON mouth state table set up have recorded the operating state of each PON mouth in the protection group of establishment, comprises operating conditions and state for subsequent use, and when just creating, the current state of protection PON mouth is state for subsequent use, and the current state of work PON mouth is operating conditions, as shown in table 2.
Table 1: protection group index relative correspondence table
| Protection group sequence number | Protection group title | Protection PON mouth | Work PON mouth |
| 1 | ProtA | ponIndex1 | ponIndex2、ponIndex3 |
| 2 | ProtB | ponIndex4 | ponIndex5、ponIndex6 |
Table 2: protection group PON mouth state table
| Protection group sequence number | Port | State |
| 1 | ponIndex1 | State for subsequent use | operating conditions |
| 1 | ponIndex2 | Operating conditions | state for subsequent use |
| 1 | ponIndex3 | Operating conditions | state for subsequent use |
Step 402: master control borad sends to the PON OLT line card at each work PON mouth place and the PON OLT line card at protection PON mouth place and creates protection group message;
Particularly; master control borad sends establishment protection group message to the PON OLT line card at protection PON mouth place; wherein carry the data that protection group index relative correspondence is shown and protection PON mouth need be synchronous, need synchronous data to comprise: the ONU service data that the data that user configures at work PON mouth, the configuration data of ONU, work PON mouth are online.ONU service data comprises the LLID of ONU, the state etc. of ONU MAC, ONU.
Master control borad sends to work PON mouth place PON OLT line card and creates protection group message, wherein carries the state information of the work PON mouth that protection group index relative correspondence is shown and this line card comprises.
Step 403:PON OLT line card creates protection group data in this locality after receiving and creating protection group message;
Particularly; when this line card comprises work PON mouth; open the optical module switch of work PON mouth; make work PON mouth optical module luminous; and protection group data are sent to work PON mouth, comprising: flag bit identifies whether this PON mouth is in protection group, PON mouth current state (being operating conditions during establishment).
When this line card comprises protection PON mouth; close the optical module switch of protection PON mouth; make optical module not luminous; and need synchronous data to be sent to protection PON mouth in protection PON mouth, need synchronous data to comprise: flag bit identifies whether this PON mouth is in protection group, the Backup Data table of protection group sequence number, PON mouth current state (being state for subsequent use during establishment) and all working PON mouth (setting up when receiving the notice creating protection group).Work PON mouth Backup Data table mainly comprises following information: the ONU service data that protection group sequence number, PON stomochord draw, PON mouth attribute (configuration data of work PON mouth), ONU index, ONU configuration data, work PON mouth are online.ONU configuration data comprises: the information of all ONU in the configuration of work PON mouth such as bandwidth, VLAN, encryption.The log-on message of ONU service data mainly ONU, when can realize switching, ONU need not go to register direct operation, comprises the state etc. of the LLID of ONU, ONU MAC, ONU.Backup Data table can be realized by chained list.
Protection PON mouth can run the normal operation of a default data keeping system.The optical module of protection PON mouth is closed, illogical business, and ONU can not register at protection PON mouth, therefore there will not be the situation of ONU data collision.
Be Forced Switch flow process as shown in Figure 5, comprise the following steps:
Step 501: when carrying out Forced Switch by hand, master control borad, to protection PON mouth place PON OLT line card and the instruction being sent Forced Switch by the work PON mouth place PON OLT line card switched, at least carries the work PON stomochord that need switch and draws;
Step 502:PON OLT line card receives the instruction of Forced Switch, draw according to work PON stomochord and judge that whether protection PON mouth is at this line card, check the current state of protection PON mouth, if protection PON mouth is state for subsequent use, open the optical module of protection PON mouth, and light path is switched to by light path corresponding to the work PON mouth light path of switching, the data finding and will run are drawn according to work PON stomochord, run by the data of the work PON mouth switched, and the current state of protection PON mouth is set to operating conditions; Protection PON mouth starts normal work; If protection PON mouth is operating conditions, close the optical module of protection PON mouth, and the current state of protection PON mouth is set to state for subsequent use;
Whether PON OLT line card also draws according to work PON stomochord and judges by the work PON mouth switched at this line card, check the current state of this work PON mouth, if work PON mouth is operating conditions, close by the optical module of the work PON mouth switched, and be set to state for subsequent use by by the current state of switching work PON mouth, if work PON mouth is state for subsequent use, open by the optical module of the work PON mouth switched.
Owing to having occurred that the deterioration of PON mouth light signal or the system when serious conditions work PON mouths such as light break down that can not receive start the flow process of switching as shown in Figure 6:
Step 601: due to fault carry out pretection switch time, line card detects that certain work PON mouth breaks down, and notice master control borad work PON mouth breaks down, and wherein carries this work PON stomochord and draws;
Step 602: master control borad draws according to this work PON stomochord and judges whether it is in certain protection group; judge whether can carry out switching (if protecting PON mouth current is state for subsequent use, can switch; if protection PON mouth is current is operating conditions, cannot switch); if can switch, send pretection switch message to the work PON mouth broken down and protection PON mouth place PON OLT line card, carry the work PON stomochord broken down and draw.
Step 603:PON OLT line card receives pretection switch message, draw according to work PON stomochord and judge that whether protection PON mouth is at this line card, indicate the optical module opening protection PON mouth, and light path is switched to by light path corresponding to the work PON mouth light path of switching, the data finding and will run are drawn according to work PON stomochord, run by the data of the work PON mouth switched, and the current state of protection PON mouth is set to operating conditions; Protection PON mouth starts normal work.
Whether PON OLT line card also draws according to work PON stomochord and judges by the work PON mouth switched at this line card, is close by the optical module of the work PON mouth switched, and be set to state for subsequent use by by the current state of switching work PON mouth.
After protection PON mouth switches to work PON mouth, be in operating conditions, other work PON mouth can not be switched to protection PON mouth again; only have when former work PON mouth is repaired; after switching back former work PON mouth, protection PON mouth reverts to state for subsequent use, and other work PON mouth can carry out pretection switch.
Application example
Fig. 2 describes the networking diagram of PON system when applying the inventive method.The protection group arranged for certain network element device comprises PON mouth 1 and the PON mouth 2 of OLT1, and the PON mouth 1 of OLTN and PON mouth 2; Wherein, the PON mouth 2 of OLT1 and PON1 and the PON mouth 2 of OLT N are as work PON mouth, and the PON mouth 1 of OLT1 is as protection PON mouth.
This pretection switch method both can realize inter-board protection also can realize protection in plate, is connected the trunk optical fiber of multiple light path, as Backup lightpath by 1 × N optical switch.Work PON mouth connects ONU by 2:N optical splitter, and a trunk optical fiber is connected to work PON mouth, and another root trunk optical fiber is linked into the N end of 1 × N optical switch, and 1 × N optical switch 1 end is connected to protection PON mouth.If 1a, 2a, 3a in figure are working light paths; 1b, 2b, 3b are the Backup lightpath of protection PON mouth correspondence, and wherein, 1b is the Backup lightpath of Backup lightpath working light path 1a; 2b is the Backup lightpath of Backup lightpath working light path 2a, and 3b is the Backup lightpath of Backup lightpath working light path 3a.Working light path is can just normal open business, and the OLT optical module of Backup lightpath is closed, and can not lead to business.Suppose that 2a light path disconnects, cause pretection switch to occur, the business of former 2a light path is switched to 2b light path.Optical switch is by 2b optical circuit, and the optical module of the PON mouth 1 of OLT1 is opened, can just normal open business in 2b light path.Other Backup lightpath are still disconnection.
Claims (9)
1. a method for protection switching of backbone optical path, comprising:
For network element device creates protection group, described protection group comprises protection EPON (PON) mouth and multiple work PON mouth;
When carrying out pretection switch, protected to described the light path that PON mouth is corresponding with it by the work PON mouth optical path switching switched by described protection group;
The master control borad of described network element device is that network element device creates protection group, comprises the index relative correspondence table and PON mouth state table of setting up protection group, and this index relative correspondence table comprises protection group sequence number, protection group title, protection PON stomochord draws and the PON stomochord that works draws;
After described master control borad creates protection group, send to each work PON mouth place PON OLT line card and create protection group message, wherein carry the state information of the work PON mouth that protection group index relative correspondence is shown and this line card comprises, PON OLT line card transmission also to protection PON mouth place creates protection group message, wherein carries the data that protection group index relative correspondence is shown and protection PON mouth need be synchronous;
After described work PON mouth place PON OLT line card receives and creates protection group message, notice work PON mouth is in protection group, and opens the optical module switch of work PON mouth;
After described protection PON mouth place PON OLT line card receives and creates protection group message, close the optical module switch of protection PON mouth, and need synchronous data to be sent to protection PON mouth in protection PON mouth.
2. the method for claim 1, is characterized in that:
When carrying out Forced Switch, the master control borad of described network element device, to protection PON mouth place PON OLT line card and the instruction being sent Forced Switch by the work PON mouth place PON OLT line card switched, carries the work PON stomochord that need switch and draws;
PON OLT line card draws according to described work PON stomochord and judges that whether protection PON mouth is at this line card, check the current state of protection PON mouth, if protection PON mouth is state for subsequent use, open the optical module of protection PON mouth, and light path is switched to by light path corresponding to the work PON mouth light path of switching, run by the data of the work PON mouth switched, and the current state of protection PON mouth is set to operating conditions, if protection PON mouth is operating conditions, close the optical module of protection PON mouth, and the current state of protection PON mouth is set to state for subsequent use;
Whether PON OLT line card also draws according to described work PON stomochord and judges by the work PON mouth switched at this line card, check the current state of this work PON mouth, if work PON mouth is operating conditions, close by the optical module of the work PON mouth switched, and be set to state for subsequent use by by the current state of switching work PON mouth, if work PON mouth is state for subsequent use, open by the optical module of the work PON mouth switched.
3. the method for claim 1, is characterized in that:
After the PON OLT line card of described network element device detects that the work PON mouth of this line card breaks down, notice master control borad work PON mouth breaks down, carry described work PON stomochord to draw, master control borad draws according to described work PON stomochord and judges whether this work PON mouth is in protection group, judge whether the protection PON mouth of this protection group is state for subsequent use further, that send pretection switch message to protection PON mouth place PONOLT line card and by the work PON mouth place PON OLT line card switched, the work PON stomochord carried by switching draws;
PON OLT line card draws according to described work PON stomochord and judges that whether protection PON mouth is at this line card, indicate the optical module opening protection PON mouth, and light path is switched to by light path corresponding to the work PON mouth light path of switching, run by the data of the work PON mouth switched, and the current state of protection PON mouth is set to operating conditions;
PON OLT line card also draws to judge by the work PON mouth switched it whether at this line card, is close described by the optical module of work PON mouth switched, and be set to state for subsequent use by by the current state of switching work PON mouth according to described work PON stomochord.
4. the method for claim 1, is characterized in that:
Described protection PON stomochord draws and the PON stomochord that works draws employing slot number and PON port numbers common ID.
5. the method for claim 1, is characterized in that:
Described protection PON mouth needs synchronous data to comprise, and flag bit identifies whether this PON mouth is in protection group, the Backup Data table of protection group sequence number, PON mouth current state and all working PON mouth.
6. a network element device for protection switching of backbone optical path, described network element device comprises master control borad and one or more EPON optical fiber cable termination equipment PON OLT line card; It is characterized in that:
Described master control borad, for creating protection group for network element device; And when needing to indicate the protection PON mouth in described protection group to run by the data of the work PON mouth switched when carrying out pretection switch; The described protection group created comprises a protection PON mouth and multiple work PON mouth;
Described PON OLT line card, carries out pretection switch for the instruction according to described master control borad, is protected the light path that PON mouth is corresponding with it by described protection group by the work PON mouth optical path switching switched to described;
Described master control borad comprises master control conservation treatment module;
Described master control conservation treatment module, protection group is created for the instruction according to the establishment protection group received, comprise the index relative correspondence table creating protection group, the index relative correspondence of described protection group shows to comprise protection group sequence number, protection group title, protection PON stomochord draws and the PON stomochord that works draws;
Described master control conservation treatment module also creates protection group message for sending to protection PON mouth place line card, the protection group information and the protection PON mouth that wherein carry establishment need synchronous data, send to work PON mouth place line card and create protection group message, wherein carry the state information of the work PON mouth that the protection group information of establishment and this line card comprise;
Described PON OLT line card comprises line card conservation treatment module and optical switch control module;
Described line card conservation treatment module, for receiving the establishment protection group message that master control borad issues, when the protection PON mouth in the protection group created is the PON mouth of this line card, by data syn-chronization synchronous for the need wherein carried to protection PON mouth, and notify that optical switch control module closes the optical module of protection PON mouth, when the work PON mouth in the protection group created comprises the PON mouth of this line card, notice optical switch control module opens the optical module of work PON mouth, and this protection group sequence number, work PON mouth current state are sent to work PON mouth;
Described optical switch control module, for closing the optical module of protection PON mouth according to described notice, and opens the optical module of work PON mouth.
7. equipment as claimed in claim 6, is characterized in that:
Described master control borad also comprises OAMAgent module, and the instruction for the Forced Switch by reception is forwarded to master control conservation treatment module, wherein carries the sequence number of the protection group that need switch and/or title, direction that the work PON stomochord that need switch draws and switches;
Described master control conservation treatment module also for receive Forced Switch instruction after to protection PON mouth place PON OLT line card and switched work PON mouth place PON OLT line card and send the instruction of Forced Switch, carry the work PON stomochord that need switch and draw;
Described line card conservation treatment module also for receive Forced Switch instruction after, draw according to work PON stomochord wherein and judge that whether the work PON mouth that need switch is at this line card, notify that line card Service Processing Module carries out pretection switch, wherein indicate the work PON stomochord that need switch to draw, line card conservation treatment module also checks the current state of the work PON mouth that need switch, if operating conditions then notifies the optical module of optical switch control module closedown work PON mouth, if state for subsequent use then notifies that optical switch control module opens the optical module of work PON mouth, the work PON stomochord wherein indicated by switching draws,
For drawing according to work PON stomochord, line card conservation treatment module also judges that whether its protection PON mouth is at this line card, notify that line card Service Processing Module carries out pretection switch, the work PON stomochord wherein indicated by switching draws, and notice optical switch control module opens the optical module of protection PON mouth when protecting PON mouth to be state for subsequent use, when protecting PON mouth to be operating conditions, notice optical switch control module closes the optical module of protection PON mouth;
Described line card Service Processing Module is for receiving the notice of carrying out pretection switch, when by the work PON mouth switched at this line card time, switch the current state of this work PON mouth, when protecting PON mouth at this line card, the current state of switch protecting PON mouth, and instruction protection PON mouth runs by the data of the work PON mouth switched when protecting PON mouth to be switched to operating conditions by state for subsequent use;
Described optical switch control module also for receive the optical module of opening/closing protection PON mouth notice after the optical module of opening/closing protection PON mouth, and receive opening/closing work PON mouth optical module notice after the optical module of opening/closing work PON mouth.
8. equipment as claimed in claim 6, is characterized in that:
Described master control borad also comprises PON Service Processing Module;
Line card Service Processing Module also notifies that master control borad work PON mouth breaks down for detecting after work PON mouth breaks down, and wherein carries this work PON stomochord and draws;
Described PON Service Processing Module also for receive work PON mouth fault notice after send the fault warning of PON mouth to master control conservation treatment module, wherein carry the work PON stomochord broken down and draw;
For drawing according to work PON stomochord, described master control conservation treatment module also judges whether this work PON mouth is in protection group, judge whether the protection PON mouth of this protection group is state for subsequent use further, send pretection switch message to protecting PON mouth place PON OLT line card and being switched work PON mouth place PON OLT line card, wherein carry the work PON stomochord broken down and draw;
Described line card conservation treatment module is also for after receiving pretection switch message, draw according to described work PON stomochord and judge that whether protection PON mouth is at this line card, be notify that line card Service Processing Module carries out pretection switch, wherein indicate and to be regarded it as by the work PON stomochord switched and notify that optical switch control module opens the optical module of described protection PON mouth; Also to judge by the work PON mouth switched it whether at this line card, is notify that optical switch control module is closed described by the optical module of work PON mouth switched for drawing according to described work PON stomochord;
Described line card Service Processing Module is also for receiving the notice of carrying out pretection switch, protect PON mouth to run by the data of the work PON mouth switched described in instruction when protecting PON mouth at this line card, and the current state of protection PON mouth is set to operating conditions, when by the work PON mouth switched at this line card time be set to state for subsequent use by by the current state of work PON mouth of switching;
Described optical switch control module is also described by the optical module of work PON mouth switched for closing according to described notice, opens the optical module of described protection PON mouth.
9. equipment as claimed in claim 6, is characterized in that:
Described protection PON stomochord draws and the PON stomochord that works draws employing slot number and PON port numbers common ID.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010002845.6A CN102130718B (en) | 2010-01-20 | 2010-01-20 | A kind of network element device of protection switching of backbone optical path and method |
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| CN201010002845.6A CN102130718B (en) | 2010-01-20 | 2010-01-20 | A kind of network element device of protection switching of backbone optical path and method |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102369737B (en) * | 2011-09-05 | 2014-03-12 | 华为技术有限公司 | Data communication method of optical network system, optical network units and system |
| CN102368836B (en) * | 2011-09-23 | 2015-02-25 | 烽火通信科技股份有限公司 | Method for realizing flexible configuration transference between passive optical network (PON) ports |
| CN103546833B (en) * | 2012-07-09 | 2018-04-06 | 上海斐讯数据通信技术有限公司 | Service restoration method and system in GPON |
| CN103139066B (en) * | 2013-01-29 | 2017-04-05 | 大唐移动通信设备有限公司 | A kind of changing method of resource, main control device and node device |
| CN104253735B (en) | 2013-06-27 | 2019-05-24 | 中兴通讯股份有限公司 | Optical network unit, communication system and method |
| CN105187497B (en) * | 2015-08-07 | 2018-02-13 | 上海斐讯数据通信技术有限公司 | A kind of line card management method based on distributed system OLT device |
| CN107465525A (en) * | 2016-06-02 | 2017-12-12 | 中兴通讯股份有限公司 | A kind of port protection method and device |
| CN107483103A (en) * | 2017-10-11 | 2017-12-15 | 深圳市新格林耐特通信技术有限公司 | OLT device and OLT device redundancy protected method |
| CN117353806A (en) * | 2022-06-29 | 2024-01-05 | 中兴通讯股份有限公司 | Trunk light path protection method and system, optical matrix device, electronic device and medium |
| CN117376742A (en) * | 2022-06-30 | 2024-01-09 | 中兴通讯股份有限公司 | Backbone light path protection method and system, electronic device and computer readable medium |
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| CN1703008A (en) * | 2005-06-29 | 2005-11-30 | 飞博创（成都）科技有限公司 | Passive optical network protecting method and system |
| CN101170837A (en) * | 2006-10-27 | 2008-04-30 | 中兴通讯股份有限公司 | A method for realizing cross-cable card protection on Gbit passive optical network device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1703008A (en) * | 2005-06-29 | 2005-11-30 | 飞博创（成都）科技有限公司 | Passive optical network protecting method and system |
| CN101170837A (en) * | 2006-10-27 | 2008-04-30 | 中兴通讯股份有限公司 | A method for realizing cross-cable card protection on Gbit passive optical network device |
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