CN101917225B - Method for realizing inter-disc STM-1 interface automatic protection switching in gigabit-capable passive optical network (GPON) system - Google Patents
Method for realizing inter-disc STM-1 interface automatic protection switching in gigabit-capable passive optical network (GPON) system Download PDFInfo
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Abstract
The invention relates to a method for realizing inter-disc STM-1 interface automatic protection switching in a gigabit-capable passive optical network (GPON) system. The method comprises the following steps that: 1, an inter-disc optical line automatic protection switching function is initiated, and two STM-1 interface discs are appointed as master and backup discs respectively; 2, E1 service links are set up in the two STM-1 interface discs, wherein only the master disc carries corresponding E1 services; 3, the master and backup discs directly send Ethernet double-layered packets to each other to intercommunicate about respective states; 4, when the master disc fails, a switching operation instruction is sent in the form of the Ethernet double-layered packets to the backup disc, and the backup disc is switched into the master disc to carry the corresponding E1 services; and 5, the master and backup discs report the changed states to a network manager. According to the method of the invention, the master and backup states of the STM-1 interface discs are switched by directly sending the double-layered packets, so that the operation efficiency of the system is improved, the time delay in switching is reduced, furthermore, the high real-time requirement on time division multiplex (TDM) services is met, and the reliability of equipment and the degree of satisfaction of telecommunication operators and users are improved.
Description
Technical field
The present invention relates to the service protection switching technique of the inside of GPON system in the communications field, is the implementation method of STM-1 interface automatic protection switching between the mid-game of a kind of GPON system specifically.The STM-1 interface is used for transmitting the E1 business between the mid-game of described GPON system.
Background technology
GPON (Gigabit-Capable Passive Optical Networks) technology is the broadband access technology of a new generation, and the GPON system connects a plurality of optical network unit ONU (Optical Networks Unit) by optical line terminal OLT (optical line terminal) by optical distribution network ODN (Optical Distribution Network).The GPON system not only can provide Ethernet data business, voice, IPTV (Internet Protocol Television, Web TV) business at a high speed, and traditional E1 business can be provided, accomplish can with the fusion of old narrowband access network.
The general access that is used for the big customer of described E1 business has large-scale application in bank returns with mobile base station, just the reliability requirement to the E1 business is very high for this, has higher requirement to transmitting reliable E1 business in the novel GPON system simultaneously.After great fault had occured the E1 business, it was the current significant problem that solves of needing that the reliable protection that how can realize the E1 business within the shortest time is switched.
" inter-board protection switching method of TDM service channel in a kind of EPON system " (application number 200910136300.1) proposed a kind of in the EPON system TDM (Time Division Multiplex; time division multiplexing) method that protection is switched between professional coiling; its operation principle is: two TDM dishes of configuration in system; and to configure them be a protection group; one in running order, and it is accepted the E1 business configuration that main control unit issues and creates the E1 service link.Another piece is in stand-by state, and it only accepts the E1 business configuration, and does not create the operation of E1 service link.Main control unit goes the state information of the active and standby TDM dish of poll, thereby determines whether switching of master and backup discs carries out.The thinking that this invention provides a good E1 service protection to switch for us, but still there is following problem in this invention:
The state information that main control unit coils by poll TDM in this invention of the one,, thus determine whether switching of master and backup discs carries out.Switching operation is just carried out the possibility that this has not only increased switching time but also has increased faulty operation under main control unit is intervened.
Although standby dish is accepted the E1 business configuration in this invention of the 2nd,, does not create the E1 service link, after becoming master, switching operation just creates the E1 service link, the same like this increase that can cause switching time when carrying out.
Summary of the invention
For the defective that exists in the prior art; the object of the present invention is to provide the implementation method of STM-1 interface automatic protection switching between the mid-game of a kind of GPON system; the direct activestandby state that sends conversion STM-1 interface disc by two layers of bag; improved running efficiency of system; reduced the time delay of switching; more satisfy the high real-time requirement of TDM business, improved the reliability of equipment, improved telecom operators and user's satisfaction.
For reaching above purpose, the technical scheme that the present invention takes is:
The implementation method of STM-1 interface automatic protection switching is characterized in that between the mid-game of a kind of GPON system, may further comprise the steps:
Step 2, webmaster issue the order of identical E1 business configuration simultaneously to two STM-1 interface discs by main control unit, two STM-1 interface discs all create the E1 service link;
Step 2.1 after master CPU module receives the order of E1 business configuration, is opened the Ethernet GE mouth of master Switch module, creates the E1 link, and it is professional that master carries corresponding E1;
Step 2.2 after standby dish CPU module receives the order of E1 business configuration, creates the E1 link, disconnects the Ethernet GE mouth of standby dish Switch module, and it is professional that standby dish does not carry corresponding E1;
Step 3, master and backup discs be by directly mutually sending out Ethernet two layers of bag intercommunication state separately, and simultaneously with this state information report to webmaster; Can wherein, standby dish be announced the operating state of master oneself with the form that sends two layers of bag, carry out switching operation so that master is known standby dish; Master is accepted the two layers of bag that comprise its state information sent for dish, and master determines whether to switch order to sending for hair updo according to the state of standby dish when needs are switched;
Step 4, when to such an extent as to the STM-1 interface disc optical link that is in primary attitude goes wrong when having influence on the E1 business, this STM-1 interface disc initiatively sends the switching operation order to standby dish with the form of two layers of bag of Ethernet, the STM-1 interface disc that will be in attitude for subsequent use switches to primary attitude, accept the Ethernet bag that far-end ONU puts forward, carry corresponding E1 professional;
Step 5, the state reporting after master and backup discs will change is to webmaster.
On the basis of technique scheme, standby dish to the message format of two layers of bag that comprise its state information that master sends is:
Destinate MAC, 6 bytes, the MAC Address of the master that send to;
Source MAC, 6 bytes are sent the MAC Address of the standby dish of two layers of bag;
Ether Type, 2 bytes, network type;
Slot number, 1 byte, the backboard slot number of standby dish;
State information, 1 byte, state information byte represent when being 0XFF that standby dish is working properly, can carry out switching operation; The state information byte represents when being 0X00 that standby dish work is undesired, can not carry out switching operation;
Reserve bytes, 48 bytes are not used temporarily.
On the basis of technique scheme, master to the message format of two layers of bag that comprise the switching operation order that standby hair updo is sent is:
Destinate MAC, 6 bytes, the MAC Address of the standby dish that send to;
Source MAC, 6 bytes are sent the MAC Address of the master of two layers of bag;
Ether Type, 2 bytes, network type;
Slot number, 1 byte, the backboard slot number of standby dish;
Switching operation, 1 byte, switching operation byte are that the standby dish of 0x55 indication carries out switching operation;
Reserve bytes, 48 bytes are not used temporarily.
On the basis of technique scheme, two light crossings that operate in two STM-1 interface discs in the GPON system are arranged to concurrent, simultaneously transmitted signal;
Described STM-1 interface disc comprises: SDH module, CES module, Switch module, CPU module; Wherein:
The SDH module is finished minute multiple connection of 155.52Mbit/s to 63 E1 business, and finishes STM-1 optical interface alarm detection, and described optical interface alarm is as the trigger condition of masterslave switchover;
The CES module is finished the Circuit Emulation Service of E1 business, finishes the mutual conversion between PCM data and Ethernet data;
The Switch module is finished the exchange of Ethernet data;
The CPU module is the control module of whole single-deck, finishes transmitting-receiving and the parsing of switching order.
On the basis of technique scheme, if the SDH module detects optical link the optical interface alarm is arranged, then produce to the CPU module by interrupt line INT and interrupt, the CPU module is immediately by Ethernet FE mouth and Switch module communication, and order is switched to sending for hair updo, while linkdown Ethernet GE mouth in the upper united mouth of process Switch module;
Standby dish is received and is switched after the order the immediately Ethernet GE mouth of linkupSwitch module, will oneself become master and change information to the webmaster advertised states, informs main control unit generation masterslave switchover event.
The implementation method of STM-1 interface automatic protection switching between the mid-game of GPON of the present invention system has the following advantages:
1, improves the reliability of equipment, improved telecom operators and user's satisfaction.
2, directly by the activestandby state that sends conversion STM-1 interface disc of two layers of bag, improve running efficiency of system, reduced the time delay of switching, more satisfied the high real-time requirement of TDM business.
3, the operation of equipment, the ability of maintenance and management have been strengthened.
Description of drawings
The present invention has following accompanying drawing:
Fig. 1 system model block diagram,
Fig. 2 STM-1 interface disc theory diagram,
Flow chart is switched in protection between Fig. 3 STM-1 interface disc,
Two layers of packet voice form of Fig. 4 state information,
Fig. 5 switches two layers of packet voice form.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Fig. 1 is the Optical Line Protection exchanging system model framework chart of STM-1 interface between the GPON system mid-game that provides of the present invention, and as shown in Figure 1, described GPON system adopts point-to-multipoint access module, and local side accesses a plurality of far-end ONU.For the transmission of E1 business, can be with the professional tandem of E1 of the single E1 interface of the dispersion of the different ONU of far-end two STM-1 interfaces to the active and standby STM-1 interface disc of local side, two STM-1 interfaces on the active and standby STM-1 interface disc of local side can be protected each other.
Described E1 business all is to transmit by the form of Ethernet bag in the GPON internal system.Below illustrate respectively the E1 business up, descending process:
E1 business up, ONU converts the E1 business to Ethernet data to the GPON OLT of local side by the function of circuit simulation, GPON OLT by backboard through being transferred to the upper united mouth of STM-1 interface disc among Fig. 2 after the exchange of main control unit, by Switch module (Switching Module) Ethernet GE (gigabit Ethernet mouth) mouthful arrives CES (circuit simulation) module again, the CES module is reduced into tdm data with Ethernet data again, becomes the light mouth Packet Generation of a STM-1 to go out the data multiplexing of 63 (STM-1 can only carry 63 E1) E1 by SDH (Synchronous Digital Hierarchy) module again.
E1 business descending with up opposite, no longer described in detail.
Principle according to Ethernet exchanging; if directly adopting the shutoff of control STM-1 interface is Optical Line Protection switch function between can not the realization dish; even because turn-offed the STM-1 interface of primary STM-1 interface disc; the Ethernet data of coming from GPON OLT still can exchange to primary STM-1 interface disc by main control unit; thereby cause the E1 service disconnection; can not reach the purpose of protection; in order to realize the Optical Line Protection switch function of two dishes in the GPON system, can realize by opening or closing Ethernet GE mouth.
The present invention has provided the implementation method of STM-1 interface automatic protection switching between the mid-game of GPON system, and its flow chart as shown in Figure 3.Webmaster issues the order of optical link APS function between open disk and the configuration order of E1 business, and an appointment wherein STM-1 interface disc is master (scratch diskette), and other one is standby dish (dish for subsequent use).They receive the E1 business configuration from main control unit simultaneously, set up relevant E1 link, the Ethernet GE mouth on the master is by linkup (connection), and the Ethernet GE mouth on the standby dish is by linkdown (disconnection), so, only have that active and standby can to carry corresponding E1 in work professional this moment.After the master optical link breaks down, transmission includes two layers of bag switching order and coils and linkdown Ethernet GE mouth to standby, standby dish is resolved corresponding two layers of bag, the Ethernet GE mouth of this dish of linkup immediately after the coupling, because the link of standby dish is successfully established, so it is professional to have carried E1 within the shortest time, finishes the work of switching.Its step can be summarized as: step 1, and optical link APS function between open disk specifies two STM-1 interface discs respectively as master and backup discs; Step 2, two STM-1 interface discs all create the E1 service link; Only master carries corresponding E1 business; Step 3, master and backup discs are directly sent out Ethernet two layers of bag intercommunication state separately mutually; Go wrong Shi Xiangbei dish of step 4, master sends the switching operation order with the form of two layers of bag of Ethernet, and standby dish will be switched to master, carries corresponding E1 business; Step 5, the state reporting after master and backup discs will change is to webmaster.
The below's minute several parts are illustrated the whole course of work of switching shown in Figure 3:
Step 2, webmaster issue the order of identical E1 business configuration simultaneously to two STM-1 interface discs by main control unit, two STM-1 interface discs all create the E1 service link;
Step 2.1 after master CPU module receives the order of E1 business configuration, is opened the Ethernet GE mouth (the Ethernet GE mouth on the master is by linkup) of master Switch module, creates the E1 link, and it is professional that master carries corresponding E1;
Step 2.2 after standby dish CPU module receives the order of E1 business configuration, creates the E1 link, disconnects the Ethernet GE mouth (the Ethernet GE mouth on the standby dish is by linkdown) of standby dish Switch module, and it is professional that standby dish does not carry corresponding E1;
Step 3, master and backup discs be by directly mutually sending out Ethernet two layers of bag intercommunication state separately, and simultaneously with this state information report to webmaster; Can wherein, standby dish be announced the operating state of master oneself with the form that sends two layers of bag, carry out switching operation so that master is known standby dish; Master is accepted the two layers of bag that comprise its state information sent for dish, and master determines whether to switch order to sending for hair updo according to the state of standby dish when needs are switched;
As shown in Figure 4, standby dish to the message format of two layers of bag that comprise its state information of master transmission is:
Destinate MAC, 6 bytes, the MAC Address of the master that send to;
Source MAC, 6 bytes are sent the MAC Address of the standby dish of two layers of bag;
Ether Type, 2 bytes, network type;
Slot number, 1 byte, the backboard slot number of standby dish;
State information, 1 byte, state information byte represent when being 0XFF that standby dish is working properly, can carry out switching operation; The state information byte represents when being 0X00 that standby dish work is undesired, can not carry out switching operation;
Reserve bytes, 48 bytes are not used temporarily.
Step 4, when to such an extent as to the STM-1 interface disc optical link that is in primary attitude goes wrong when having influence on the E1 business, this STM-1 interface disc initiatively sends the switching operation order to standby dish with the form of two layers of bag of Ethernet, the STM-1 interface disc that will be in attitude for subsequent use switches to primary attitude, accept the Ethernet bag that far-end ONU puts forward, carry corresponding E1 professional;
As shown in Figure 5, master to the message format of the two layers of bag that comprise the switching operation order that send for hair updo is:
Destinate MAC, 6 bytes, the MAC Address of the standby dish that send to;
Source MAC, 6 bytes are sent the MAC Address of the master of two layers of bag;
Ether Type, 2 bytes, network type;
Slot number, 1 byte, the backboard slot number of standby dish;
Switching operation, 1 byte, switching operation byte are that the standby dish of 0x55 indication carries out switching operation;
Reserve bytes, 48 bytes are not used temporarily.
Step 5, the state reporting after master and backup discs will change is to webmaster.
The implementation method of STM-1 interface automatic protection switching operates in two STM-1 interface discs in the GPON system between the mid-game of GPON of the present invention system, and two light crossings of two STM-1 interface discs are arranged to concurrent, simultaneously transmitted signal.Described STM-1 interface disc comprises: SDH module, CES module, Switch module, CPU module.Wherein:
The SDH module is finished minute multiple connection of 155.52Mbit/s to 63 E1 business, and finish STM-1 light and connect alarm detection, wherein, the optical interface alarm comprises: LOS (receiving unglazed), LOF (LOF), OOF (OOF), AIS (complete " 1 ") etc., these optical interface alarms are as the trigger condition of masterslave switchover.If the SDH module detects optical link the optical interface alarm is arranged, then produce to the CPU module by the interrupt line INT shown in Fig. 2 and interrupt, the CPU module is immediately by Ethernet FE mouth and Switch module communication, and order is switched to sending for hair updo, while linkdown Ethernet GE mouth in the upper united mouth of process Switch module.Standby dish is received and is switched after the order the immediately Ethernet GE mouth of linkupSwitch module, will oneself become master and change information to the webmaster advertised states, informs main control unit generation masterslave switchover event.
The CES module is finished the Circuit Emulation Service of E1 business, finishes the mutual conversion between PCM data and Ethernet data.
The Switch module is finished the exchange of Ethernet data.
The CPU module is the control module of whole single-deck, finishes transmitting-receiving and the parsing of switching order.
Standby dish is only monitored two layers of bag all the time.When two layers of bag that have target to switch mated, standby dish was made as the linkup state with the Ethernet GE mouth of oneself immediately.Do not need other operation namely can smoothly finish switch work because the E1 service link is set up already this moment.The state that standby dish changes oneself is master, and sends the notice message of a masterslave switchover to webmaster, informs activestandby state generation conversion and the corresponding slot number of master and backup discs this moment of this moment.This dish enters the workflow of master afterwards.
In sum, the flow process of switching that auto switching is concrete between the STM-1 interface disc is: webmaster issues the function of opening two STM-1 interface disc APSs, and one is master, and another piece is standby dish.Webmaster issues identical E1 business configuration for simultaneously two dishes.Active and standby Ethernet GE mouth is made as the linkup state, sets up corresponding E1 link.Standby dish is made as the linkdown state with Ethernet GE mouth, sets up corresponding E1 link.When event that need to switch appears in master, can initiatively send two layers of bag to corresponding slave board, simultaneously Ethernet GE mouth is made as the linkdown state.Standby dish is made as the linkup state with Ethernet GE mouth after receiving and switching order, sends the notice message of a masterslave switchover to main control unit, informs activestandby state generation conversion and the corresponding slot number of master and backup discs this moment of this moment.The invention provides the implementation method of the STM-1 optical interface APS between the mid-game of a kind of more fast GPON system.Switch under the control that not be used in main control unit and carry out, directly implement switching operation by the standby dish of master notice in the time of need to switching, and do not have main control unit to participate in this intermediate link, master and backup discs had been set up the link of E1 business before switching simultaneously, these have all shortened switching time greatly, so that business is recovered faster.
Claims (5)
1. the implementation method of STM-1 interface automatic protection switching between GPON system mid-game is characterized in that, may further comprise the steps:
Step 1, when system powered on operation, webmaster issued the order that enables the APS function by main control unit, optical link APS function between open disk, an appointment wherein STM-1 interface disc is in primary attitude as master, and another piece STM-1 interface disc is in attitude for subsequent use as standby dish;
Step 2, webmaster issue the order of identical E1 business configuration simultaneously to two STM-1 interface discs by main control unit, two STM-1 interface discs all create the E1 service link;
Step 2.1 after master CPU module receives the order of E1 business configuration, is opened the Ethernet GE mouth of master Switch module, creates the E1 link, and it is professional that master carries corresponding E1;
Step 2.2 after standby dish CPU module receives the order of E1 business configuration, creates the E1 link, disconnects the Ethernet GE mouth of standby dish Switch module, and it is professional that standby dish does not carry corresponding E1;
Step 3, master and backup discs be by directly mutually sending out Ethernet two layers of bag intercommunication state separately, and simultaneously with this state information report to webmaster; Can wherein, standby dish be announced the operating state of master oneself with the form that sends two layers of bag, carry out switching operation so that master is known standby dish; Master receives for the next two layers of bag that comprise its state information of hair updo, and master determines whether to switch order to sending for hair updo according to the state of standby dish when needs are switched;
Step 4, when to such an extent as to the STM-1 interface disc optical link that is in primary attitude goes wrong when having influence on the E1 business, this STM-1 interface disc initiatively sends the switching operation order to standby dish with the form of two layers of bag of Ethernet, the STM-1 interface disc that will be in attitude for subsequent use switches to primary attitude, receive the Ethernet bag that far-end ONU puts forward, carry corresponding E1 professional;
Step 5, the state reporting after master and backup discs will change is to webmaster.
2. the implementation method of STM-1 interface automatic protection switching between the mid-game of GPON as claimed in claim 1 system, it is characterized in that: standby dish to the message format of two layers of bag that comprise its state information that master sends is:
Destinate MAC, 6 bytes, the MAC Address of the master that send to;
Source MAC, 6 bytes are sent the MAC Address of the standby dish of two layers of bag;
Ether Type, 2 bytes, network type;
Slot number, 1 byte, the backboard slot number of standby dish;
State information, 1 byte, state information byte represent when being 0XFF that standby dish is working properly, can carry out switching operation; The state information byte represents when being 0X00 that standby dish work is undesired, can not carry out switching operation;
Reserve bytes, 48 bytes are not used temporarily.
3. the implementation method of STM-1 interface automatic protection switching between the mid-game of GPON as claimed in claim 1 system, it is characterized in that: master to the message format of two layers of bag that comprise the switching operation order that standby hair updo is sent is:
Destinate MAC, 6 bytes, the MAC Address of the standby dish that send to;
Source MAC, 6 bytes are sent the MAC Address of the master of two layers of bag;
Ether Type, 2 bytes, network type;
Slot number, 1 byte, the backboard slot number of standby dish;
Switching operation, 1 byte, switching operation byte are that the standby dish of 0x55 indication carries out switching operation;
Reserve bytes, 48 bytes are not used temporarily.
4. such as the implementation method of STM-1 interface automatic protection switching between claim 1 or the mid-game of 2 or 3 described GPON systems, it is characterized in that: two light crossings that operate in two STM-1 interface discs in the GPON system are arranged to concurrent, simultaneously transmitted signal;
Described STM-1 interface disc comprises: SDH module, CES module, Switch module, CPU module; Wherein:
The SDH module is finished minute multiple connection of 155.52Mbit/s to 63 E1 business, and finishes STM-1 optical interface alarm detection, and described optical interface alarm is as the trigger condition of masterslave switchover;
The CES module is finished the Circuit Emulation Service of E1 business, finishes the mutual conversion between PCM data and Ethernet data;
The Switch module is finished the exchange of Ethernet data;
The CPU module is the control module of whole single-deck, finishes transmitting-receiving and the parsing of switching order.
5. the implementation method of STM-1 interface automatic protection switching between the mid-game of GPON as claimed in claim 4 system, it is characterized in that: if the SDH module detects optical link the optical interface alarm is arranged, then produce to the CPU module by interrupt line INT and interrupt, the CPU module is immediately by Ethernet FE mouth and Switch module communication, and give to standby hair updo through the upper united mouth of Switch module and to switch order, disconnect simultaneously linkdown Ethernet GE mouth;
Standby dish is received and is switched the Ethernet GE mouth that connects immediately linkup Switch module after the order, will oneself become master and change information to the webmaster advertised states, informs main control unit generation masterslave switchover event.
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| CN102098198B (en) * | 2010-12-31 | 2013-07-31 | 北京华环电子股份有限公司 | Ethernet protection method and device |
| CN104270264B (en) * | 2014-09-22 | 2017-12-29 | 烽火通信科技股份有限公司 | The protection system and method for the access link of STM 1 in PTN device |
| CN108075971B (en) * | 2017-12-25 | 2021-01-26 | 新华三技术有限公司 | Main/standby switching method and device |
| CN112019370B (en) * | 2019-05-31 | 2022-07-15 | 烽火通信科技股份有限公司 | Equipment fault processing method and system |
| CN111586505B (en) * | 2020-04-26 | 2022-04-08 | 烽火通信科技股份有限公司 | Method and device for realizing rapid recovery of main/standby switching service in PON access system |
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| CN101340315A (en) * | 2008-08-26 | 2009-01-07 | 中兴通讯股份有限公司 | End-to-end Ethernet protection method and communication apparatus adopting the same |
| CN101540638A (en) * | 2009-05-06 | 2009-09-23 | 烽火通信科技股份有限公司 | Inter-board protection switching method of TDM service channel in EPON system |
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| CN101340315A (en) * | 2008-08-26 | 2009-01-07 | 中兴通讯股份有限公司 | End-to-end Ethernet protection method and communication apparatus adopting the same |
| CN101540638A (en) * | 2009-05-06 | 2009-09-23 | 烽火通信科技股份有限公司 | Inter-board protection switching method of TDM service channel in EPON system |
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