CN104270264A - Protection system and method for connecting STM-1 in PTN device to link - Google Patents
Protection system and method for connecting STM-1 in PTN device to link Download PDFInfo
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- CN104270264A CN104270264A CN201410487110.5A CN201410487110A CN104270264A CN 104270264 A CN104270264 A CN 104270264A CN 201410487110 A CN201410487110 A CN 201410487110A CN 104270264 A CN104270264 A CN 104270264A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
Abstract
The invention discloses a protection system and method for connecting an STM-1 in a PTN device to a link and relates to the field of STMs in the PTN device. The system comprises an Ethernet OAM monitoring subunit, a cross protection subunit, a synchronous transmission Ethernet interface and a synchronous transmission OAM monitoring subunit. The Ethernet OAM monitoring subunit is used for triggering the cross protection subunit to start an MSP protection mechanism when monitoring an Ethernet connection signal loss LINK_los warning or a check and error out-of-limit FCS_EXC warning in a medium intervention control layer MAC frame. The synchronous transmission OAM monitoring subunit is used for monitoring an Ethernet warning and inserting a multiplex section fault indication signal MS_AIS warning in an STM-1 frame. By means of the protection system and method, the MSP protection mechanism can be started automatically when the link of the Ethernet interface breaks down, so manpower can be saved, the working efficiency can be improved, the response speed is high, and interruption of a large amount of service can not be easily caused.
Description
Technical field
The present invention relates to the STM field in PTN device, be specifically related to protection system and the method for STM-1 access link in a kind of PTN device.
Background technology
PTN (Packet Transport Network, Packet Transport Network) technology be based on grouping kernel multi-service transportation technology of new generation, PTN network can provide multiple UNI (User Network Interface), such as based on SDH (Synchronous Digital Hierarchy, SDH (Synchronous Digital Hierarchy)) STM-1 (STM-Synchronous Transfer Module, the synchronous transfer mode of the speed 155.520Mbps) interface of technology.STM-1 interface passes through emulation technology, by traditional TDM (time division multiplexing) service access in PTN network.For increasing the stability of STM-1 access link, China Mobile's company standard requires that STM-1 interface should provide support the protective capability of MSP (multiplex section protection).
PTN, with reference to the linear MSP switchover mode of SDH of GB/T 15941-2008 the 11.1st article of institute's specification, protects STM-N (Synchronous Transport Module level n, n level synchronous transfer mode) access link; The trigger condition that MSP starts criterion defined is automatically: LOS (dropout), LOF (LOF), MS-AIS (multiplex section fault indication signal), dEXC (multiplex section Signal Fail) and dDEG (multiplex section Signal Degrade).
Shown in Figure 1; the PTN device of PTN network comprises STM-1 interface unit and cross protection unit; because STM-1 interface business is by CES (Circuit Emulation Service; circuit simulation) technology accesses to PTN network; so there are 2 kinds of interfaces in STM-1 interface unit in PTN device: 1, user oriented STM-1 interface, 2, access to the Ethernet interface of PTN network (cross protection unit).Before PTN business transfers to another a kind of interface circuit from a kind of interface circuit, OAM (Operation Administration and Maintenance, runs, the administers and maintains) information of PTN business can terminate.
Automatically start in criterion at MSP; the multiplex section alarm monitored in STM-1 frame due to STM-1 access link just can be switched by starting protection; therefore, when the fault outside the trigger condition that MSP starts criterion defined automatically appears in ethernet link layer (cross protection unit), all business in STM-1 interface all break down.But when ethernet link layer breaks down, the OAM information of Ethernet cannot be passed to STM-1 multiplex section, so multiplex section in STM-1 frame cannot alarm, and then MSP protection mechanism cannot be started.
When MSP protection mechanism, existing solution is for manually to switch from outside starting protection.But manually starting pretection switch needs operating personnel to carry out direct surveillance to ethernet link layer in real time, not only wastes a large amount of human resources; operating efficiency is lower; and the response speed of direct surveillance is comparatively slow, and then cause a large number of services to interrupt, be not easy to people and use.
Summary of the invention
For the defect existed in prior art, the object of the present invention is to provide protection system and the method for STM-1 access link in a kind of PTN device.The present invention can start MSP protection mechanism automatically when the link failure of Ethernet interface, can not only save a large amount of human resources, increase work efficiency, and response speed is very fast, not easily causes a large number of services to interrupt, and is convenient to people and uses.
For reaching above object, the invention provides the protection system of STM-1 access link in a kind of PTN device, comprising cross protection unit, the synchronous transfer mode STM-1 interface unit of speed 155.520Mbps and remote equipment; Described cross protection unit comprises cross protection Ethernet interface connected in turn, Ethernet operation management safeguards that OAM monitors subelement and cross protection subelement; Described STM-1 interface unit comprises end to end synchronous transmission Ethernet interface, STM-1 interface and synchronous transmission OAM in turn and monitors subelement; Synchronous transmission Ethernet interface is connected with cross protection Ethernet interface, and STM-1 interface is connected with remote equipment;
Described cross protection Ethernet interface is used for: the STM-1 business receiving the transmission of synchronous transmission Ethernet interface.
Described Ethernet OAM monitoring subelement is used for: monitor Ethernet connection signal and lose LINK_LOS alarm or media when getting involved the out-of-limit FCS_EXC alarm of bad checksum in key-course mac frame, trigger cross protection subelement by APS APS;
Described cross protection subelement is used for: start multiplex section protection MSP protection mechanism;
Described STM-1 interface is used for: distally equipment provides STM-1 interface;
Described synchronous transmission Ethernet interface is used for: by STM-1 service access to cross protection Ethernet interface;
Described synchronous transmission OAM monitors subelement and is used for: monitoring Ethernet alarm also inserts multiplex section fault indication signal MS-AIS alarm in STM-1 frame.
On the basis of technique scheme, described protection system, to when STM-1 access link is protected in PTN device, determines that the signal of current business flows to:
If the signal of current business flows to as up direction, STM-1 business accesses to PTN network by synchronous transmission Ethernet interface, cross protection Ethernet interface successively; When the Ethernet OAM monitoring subelement in cross protection unit monitors School Affairs FCS_EXC alarm in LINK_LOS alarm or AC frame, trigger cross protection subelement by APS and start MSP protection mechanism;
If the signal of current business flows to as down direction, when the synchronous transmission OAM monitoring subelement of STM-1 interface unit monitors Ethernet alarm, synchronous transmission OAM monitors subelement and insert MS-AIS alarm in STM-1 frame.When remote equipment monitors MS-AIS alarm, automatically start MSP protection mechanism; Or when the synchronous transmission OAM of STM-1 interface unit monitor subelement monitor Ethernet alarm time, synchronous transmission OAM monitor subelement by the 6th of the APS path K2 byte in STM-1 frame the, 7,8 bits are all set to 1; Remote equipment receive K2 the 6th, 7,8 bits are when being 1, automatically start MSP protection mechanism.
The present invention also provides a kind of guard method based on STM-1 access link in the PTN device of above-mentioned protection system, comprises the following steps:
A, determine that the signal of current business flows to, if the signal of current business flows to as up direction, forward step B to, if the signal of current business flows to as down direction, forward step C to;
B, STM-1 business accesses to PTN network by synchronous transmission Ethernet interface, cross protection Ethernet interface successively; When the Ethernet OAM monitoring subelement in cross protection unit monitors School Affairs FCS_EXC alarm in LINK_LOS alarm or AC frame, trigger cross protection subelement by APS and start MSP protection mechanism;
C, when STM-1 interface unit synchronous transmission OAM monitor subelement monitor Ethernet alarm time, synchronous transmission OAM monitor subelement in STM-1 frame, insert MS-AIS alarm.When remote equipment monitors MS-AIS alarm, automatically start MSP protection mechanism;
Or when the synchronous transmission OAM of STM-1 interface unit monitor subelement monitor Ethernet alarm time, synchronous transmission OAM monitor subelement by the 6th of the APS path K2 byte in STM-1 frame the, 7,8 bits are all set to 1; Remote equipment receive K2 the 6th, 7,8 bits are when being 1, automatically start MSP protection mechanism.
On the basis of technique scheme, automatically start MSP protection mechanism described in step C and comprise the following steps: automatically start criterion according to the linear MSP switchover mode of SDH of GB/T 15941-2008 the 11.1st article of institute's specification and MSP, automatically start MSP protection mechanism.
On the basis of technique scheme, the alarm of Ethernet described in step C comprises School Affairs FCS_EXC alarm in LINK_LOS alarm or mac frame.
Compared with prior art, the invention has the advantages that:
(1) when ethernet link layer (the synchronous transmission Ethernet interface of STM-1 interface unit) monitors dropout or when correctly cannot receive the negotiation code stream mated with local terminal (STM-1 interface unit), local terminal can produce LINK_LOS alarm.When LINK_LOS alarm occurs, the business of all STM-1 interfaces with PTN device interface generation alarm, consistent with LOS, LOF and MS-AIS alarm result in the generation STM-1 frame that the SDH of specification linear MSP switchover mode specifies.
Therefore, the present invention is when signal flows to as up direction, and Ethernet OAM monitoring subelement can monitor LINK_LOS alarm, or School Affairs FCS_EXC alarm trigger cross protection subelement by APS and start MSP protection mechanism in AC frame.Need during the fault occurring outside the trigger condition that MSP starts criterion defined automatically with ethernet link layer in prior art to manually start compared with pretection switch; the present invention is when the signal of business flows to as up direction; MSP protection mechanism can be automatically started when the link failure of Ethernet interface; a large amount of human resources can not only be saved; increase work efficiency; and response speed is very fast, not easily causes a large number of services to interrupt, is convenient to people and uses.
(2) the present invention is when the signal of business flows to as down direction, and synchronous transmission OAM monitors subelement and can monitor Ethernet alarm and in STM-1 frame, insert MS-AIS alarm; When remote equipment monitors MS-AIS alarm, automatically start criterion according to the linear MSP switchover mode of SDH of GB/T 15941-2008 the 11.1st article of institute's specification and MSP, automatically start MSP protection mechanism.
Synchronous transmission OAM monitors subelement when monitoring Ethernet alarm, can also by the 6th of the K2 byte in STM-1 frame, 7,8 bits are all set to " 1 "; Remote equipment receive K2 the 6th, 7,8 bits are when being " 1 ", automatically start criterion according to the linear MSP switchover mode of SDH of GB/T 15941-2008 the 11.1st article of institute's specification and MSP, automatically start MSP protection mechanism.
Therefore, the present invention, when signal flows to as down direction, can start MSP protection mechanism automatically when the link failure of Ethernet interface; can not only save a large amount of human resources, increase work efficiency, and response speed is very fast; not easily cause a large number of services to interrupt, be convenient to people and use.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the protection system of STM-1 access link in PTN device in the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Shown in Figure 1, the protection system of STM-1 access link in the PTN device in the embodiment of the present invention, comprises cross protection unit, STM-1 interface unit and remote equipment.
Cross protection unit comprises the cross protection Ethernet interface, Ethernet OAM monitoring subelement and the cross protection subelement that are connected in turn; STM-1 interface unit comprises end to end synchronous transmission Ethernet interface, STM-1 interface and synchronous transmission OAM in turn and monitors subelement; Synchronous transmission Ethernet interface is connected with cross protection Ethernet interface, and STM-1 interface is connected with remote equipment.
Cross protection Ethernet interface is used for: the STM-1 business receiving the transmission of synchronous transmission Ethernet interface.
Ethernet OAM monitoring subelement is used for: monitoring LINK_LOS (Ethernet connection signal loss) alarm or MAC (Media Access Control; media get involved key-course) in frame during School Affairs FCS_EXC (makeing mistakes out-of-limit) alarm; cross protection subelement is triggered by APS (Automatic Protection Switched, APS).
Cross protection subelement is used for: start MSP (multiplex section protection) protection mechanism.
STM-1 interface is used for: distally equipment provides STM-1 interface.
Synchronous transmission Ethernet interface is used for: by STM-1 service access to cross protection Ethernet interface.
Synchronous transmission OAM monitors subelement and is used for: monitoring Ethernet alarm also inserts MS-AIS (multiplex section fault indication signal) alarm in STM-1 frame.
The guard method based on STM-1 access link in the PTN device of said system in the embodiment of the present invention, comprises the following steps:
S1: determine that the signal of current business flows to, if the signal of current business flows to as up direction, forward step S2 to, if the signal of current business flows to as down direction, forward step S3 to.
S2:STM-1 business accesses to PTN network by synchronous transmission Ethernet interface, cross protection Ethernet interface successively.When the Ethernet OAM monitoring subelement in cross protection unit monitors School Affairs FCS_EXC alarm in LINK_LOS alarm or AC frame, trigger cross protection subelement by APS and start MSP protection mechanism.
S3: when the synchronous transmission OAM monitoring subelement of STM-1 interface unit monitors Ethernet alarm, synchronous transmission OAM monitors subelement and insert MS-AIS alarm in STM-1 frame.When remote equipment monitors MS-AIS alarm, automatically start criterion according to the linear MSP switchover mode of SDH of GB/T 15941-2008 the 11.1st article of institute's specification and MSP, automatically start MSP protection mechanism.
Step S3 can also be: when the synchronous transmission OAM of STM-1 interface unit monitor subelement monitor Ethernet alarm time, synchronous transmission OAM monitor subelement by the 6th of the K2 byte (APS path byte) in STM-1 frame the, 7,8 bits are all set to " 1 ".Remote equipment receive K2 the 6th, 7,8 bits are when being " 1 ", automatically start criterion according to the linear MSP switchover mode of SDH of GB/T15941-2008 the 11.1st article of institute's specification and MSP, automatically start MSP protection mechanism.
Ethernet alarm in step S3 comprises School Affairs FCS_EXC alarm in LINK_LOS alarm or mac frame.
Operation principle of the present invention is as follows:
When ethernet link layer (the synchronous transmission Ethernet interface of STM-1 interface unit) monitors dropout or when correctly cannot receive the negotiation code stream mated with local terminal (STM-1 interface unit), local terminal can produce LINK_LOS alarm.When LINK_LOS alarm occurs, the business of all STM-1 interfaces with PTN device interface generation alarm, consistent with LOS, LOF and MS-AIS alarm result in the generation STM-1 frame that the SDH of specification linear MSP switchover mode specifies.
In the mac frame of Ethernet, the error amount of verification sequence (FCS) reaches user when setting thresholding, and local terminal can produce FCS_EXC alarm.FCS is for monitoring mac frame error condition in transmitting procedure, and the synchronous transmission Ethernet interface of STM-1 interface unit monitors FCS when makeing mistakes, and shows that this frame damages in transmitting procedure; FCS makes mistakes similar with the error performance of multiplex section, and business all can be caused to damage.
The present invention is not limited to above-mentioned execution mode, and for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as within protection scope of the present invention.The content be not described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (5)
1. the protection system of STM-1 access link in PTN device, comprises cross protection unit, the synchronous transfer mode STM-1 interface unit of speed 155.520Mbps and remote equipment; Described cross protection unit comprises cross protection Ethernet interface connected in turn, Ethernet operation management safeguards that OAM monitors subelement and cross protection subelement; Described STM-1 interface unit comprises end to end synchronous transmission Ethernet interface, STM-1 interface and synchronous transmission OAM in turn and monitors subelement; Synchronous transmission Ethernet interface is connected with cross protection Ethernet interface, and STM-1 interface is connected with remote equipment; It is characterized in that:
Described cross protection Ethernet interface is used for: the STM-1 business receiving the transmission of synchronous transmission Ethernet interface;
Described Ethernet OAM monitoring subelement is used for: monitor Ethernet connection signal and lose LINK_LOS alarm or media when getting involved the out-of-limit FCS_EXC alarm of bad checksum in key-course mac frame, trigger cross protection subelement by APS APS;
Described cross protection subelement is used for: start multiplex section protection MSP protection mechanism;
Described STM-1 interface is used for: distally equipment provides STM-1 interface;
Described synchronous transmission Ethernet interface is used for: by STM-1 service access to cross protection Ethernet interface;
Described synchronous transmission OAM monitors subelement and is used for: monitoring Ethernet alarm also inserts multiplex section fault indication signal MS-AIS alarm in STM-1 frame.
2. the protection system of STM-1 access link in PTN device as claimed in claim 1, is characterized in that: described protection system, to when STM-1 access link is protected in PTN device, determines that the signal of current business flows to:
If the signal of current business flows to as up direction, STM-1 business accesses to PTN network by synchronous transmission Ethernet interface, cross protection Ethernet interface successively; When the Ethernet OAM monitoring subelement in cross protection unit monitors School Affairs FCS_EXC alarm in LINK_LOS alarm or AC frame, trigger cross protection subelement by APS and start MSP protection mechanism;
If the signal of current business flows to as down direction, when the synchronous transmission OAM monitoring subelement of STM-1 interface unit monitors Ethernet alarm, synchronous transmission OAM monitors subelement in STM-1 frame, inserts MS-AIS alarm; When remote equipment monitors MS-AIS alarm, automatically start MSP protection mechanism; Or when the synchronous transmission OAM of STM-1 interface unit monitor subelement monitor Ethernet alarm time, synchronous transmission OAM monitor subelement by the 6th of the APS path K2 byte in STM-1 frame the, 7,8 bits are all set to 1; Remote equipment receive K2 the 6th, 7,8 bits are when being 1, automatically start MSP protection mechanism.
3., based on a guard method for STM-1 access link in the PTN device of protection system described in claim 1 or 2, it is characterized in that, comprise the following steps:
A, determine that the signal of current business flows to, if the signal of current business flows to as up direction, forward step B to, if the signal of current business flows to as down direction, forward step C to;
B, STM-1 business accesses to PTN network by synchronous transmission Ethernet interface, cross protection Ethernet interface successively; When the Ethernet OAM monitoring subelement in cross protection unit monitors School Affairs FCS_EXC alarm in LINK_LOS alarm or AC frame, trigger cross protection subelement by APS and start MSP protection mechanism;
C, when STM-1 interface unit synchronous transmission OAM monitor subelement monitor Ethernet alarm time, synchronous transmission OAM monitor subelement in STM-1 frame, insert MS-AIS alarm; When remote equipment monitors MS-AIS alarm, automatically start MSP protection mechanism;
Or when the synchronous transmission OAM of STM-1 interface unit monitor subelement monitor Ethernet alarm time, synchronous transmission OAM monitor subelement by the 6th of the APS path K2 byte in STM-1 frame the, 7,8 bits are all set to 1; Remote equipment receive K2 the 6th, 7,8 bits are when being 1, automatically start MSP protection mechanism.
4. the guard method of STM-1 access link in the PTN device of protection system as claimed in claim 3; it is characterized in that: automatically start MSP protection mechanism described in step C and comprise the following steps: automatically start criterion according to the linear MSP switchover mode of SDH of GB/T 15941-2008 the 11.1st article of institute's specification and MSP, automatically start MSP protection mechanism.
5. as described in claim 3 or 4 protection system PTN device in the guard method of STM-1 access link, it is characterized in that: the alarm of Ethernet described in step C comprises School Affairs FCS_EXC alarm in LINK_LOS alarm or mac frame.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410487110.5A CN104270264B (en) | 2014-09-22 | 2014-09-22 | The protection system and method for the access link of STM 1 in PTN device |
| PCT/CN2015/089934 WO2016045538A1 (en) | 2014-09-22 | 2015-09-18 | Stm-1 access link protection system and method in ptn device |
| RU2016146785A RU2660608C1 (en) | 2014-09-22 | 2015-09-18 | System and method for protecting stm-1 access channel in ptn equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410487110.5A CN104270264B (en) | 2014-09-22 | 2014-09-22 | The protection system and method for the access link of STM 1 in PTN device |
Publications (2)
| Publication Number | Publication Date |
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| CN104270264A true CN104270264A (en) | 2015-01-07 |
| CN104270264B CN104270264B (en) | 2017-12-29 |
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| CN201410487110.5A Active CN104270264B (en) | 2014-09-22 | 2014-09-22 | The protection system and method for the access link of STM 1 in PTN device |
Country Status (3)
| Country | Link |
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| CN (1) | CN104270264B (en) |
| RU (1) | RU2660608C1 (en) |
| WO (1) | WO2016045538A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016045538A1 (en) * | 2014-09-22 | 2016-03-31 | 烽火通信科技股份有限公司 | Stm-1 access link protection system and method in ptn device |
| CN106034043A (en) * | 2015-03-18 | 2016-10-19 | 中兴通讯股份有限公司 | Method and apparatus for improving switching efficiency of multiplexing segments in packet transmit network |
| CN109104647A (en) * | 2018-06-14 | 2018-12-28 | 烽火通信科技股份有限公司 | A kind of Ethernet service interruption processing method, system and networking |
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| 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 |
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2014
- 2014-09-22 CN CN201410487110.5A patent/CN104270264B/en active Active
-
2015
- 2015-09-18 RU RU2016146785A patent/RU2660608C1/en active
- 2015-09-18 WO PCT/CN2015/089934 patent/WO2016045538A1/en active Application Filing
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016045538A1 (en) * | 2014-09-22 | 2016-03-31 | 烽火通信科技股份有限公司 | Stm-1 access link protection system and method in ptn device |
| CN106034043A (en) * | 2015-03-18 | 2016-10-19 | 中兴通讯股份有限公司 | Method and apparatus for improving switching efficiency of multiplexing segments in packet transmit network |
| CN106034043B (en) * | 2015-03-18 | 2020-01-07 | 中兴通讯股份有限公司 | Method and device for improving multiplex section switching frequency in packet transport network |
| CN109104647A (en) * | 2018-06-14 | 2018-12-28 | 烽火通信科技股份有限公司 | A kind of Ethernet service interruption processing method, system and networking |
| CN109104647B (en) * | 2018-06-14 | 2021-06-15 | 烽火通信科技股份有限公司 | Ethernet service interrupt processing method, system and networking system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104270264B (en) | 2017-12-29 |
| RU2660608C1 (en) | 2018-07-06 |
| WO2016045538A1 (en) | 2016-03-31 |
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