CN101729350A - Realizing method of PTN forward compatible MSTP ring network service channel protection - Google Patents
Realizing method of PTN forward compatible MSTP ring network service channel protection Download PDFInfo
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- CN101729350A CN101729350A CN200910250253A CN200910250253A CN101729350A CN 101729350 A CN101729350 A CN 101729350A CN 200910250253 A CN200910250253 A CN 200910250253A CN 200910250253 A CN200910250253 A CN 200910250253A CN 101729350 A CN101729350 A CN 101729350A
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Abstract
The invention relates to a channel protection method of a ring network, particularly to a channel protection method of a PTN forward compatible MSTP ring network system. When a ring network link goes wrong, facilities at both ends of a fault point respectively transmit AIS alarm indication signals to downstream facilities, the facilities receiving the AIS alarm indication signals then sequentially transparently transmit the signals to the downstream facilities, the AIS alarm indication signals are transmitted in the direction from an MSTP facility to a PTN facility at the joint of the PTN facility and the MSTP facility, the AIS channel alarm indication signals are inserted into a TMC layer of an NNI interface of the PTN facility, the AIS alarm indication signals are transmitted in the direction from the PTN facility to the MSTP facility, the AIS alarm indication signals of the TMC layer are inserted into a service channel of the MSTP facility, and a service initiating facility and a service finishing facility carry out concurrent selective receiving according to the received AIS alarm indication signals. The method provided by the invention effectively ensures the realization of channel protection when the PTN facility carries out forward compatibility for the MSTP facility.
Description
Technical field
The present invention relates to a kind of channel protection method of looped network, particularly relate to the looped network service channel protection implementation method of a kind of PTN forward compatibility MSTP.
Background technology
Fast development along with data service, the continuous appearance that wide band multi-business transmits, bandwidth such as provides at new model end to end, traditional SDH (Synchronous Digital Hierarchy) (SDH) technology, IP technology and ethernet technology all can not adapt to the comprehensive demand that the next generation network logarithm reportedly send and carries, at present, solution is Packet Transport Network PTN preferably.
Yet the introducing of any advanced technology is not accomplished in one move.Through years of development, aspect the carrying of 2G business, the structure maturation of SDH/MSTP network, stable, network size is also huger, consider that SDH/MSTP also possesses suitable IP operation bearing capacity, and the 2G business still can sustainable development in a short time.Therefore, before the PTN large scale deployment, traditional granule 2G professional and fragmentary, small-scale private line service still can be carried by the SDH/MSTP network, to make full use of the Internet resources that disposed early stage.In present practical application, the looped network of PTN forward compatibility MSTP remains a kind of comparatively general design.
As everyone knows, the important step that the path protection of looped network can not be ignored when being network design, the MSTP technology is based on the multi-service transport platform of SDH, and SDH Self-healing Rings structure can be divided into two big class, i.e. channel protection ring and multiplex section protective rings.For channel protection ring; professional protection is based on passage; just that protection is certain VC (a certain road PDH signal) of STM-N signal; whether switch by the transmission quality of a certain indivedual channel signals on the ring and decide, utilize receiving end whether to receive that simple passage ais signal decides this passage whether to switch usually.For example: receiving end receives that the 48th TU-12 of 4VC4 has LP-AIS, so just switches to alternate channel with passage and gets on.Multiplex section rearrangement is based on multiplex section, and whether switching is the multiplex section quality of signals decision of going up transmission according to ring.Switch by K1, the entrained APS agreement of K2 byte and start, when multiplex section broke down, the business of whole STM-N or 1/2STM-N all switched on the alternate channel on the ring.The protective condition of multiplex section is LOF, LOS, MS-AIS, MS-EXC (the multiplex section error code is excessive) alarm signal.The mainstream technology scheme of PTN can be divided into Ethernet enhancement techniques and transmission technology in conjunction with MPLS two big classes, and the former is representative with PBB-TE, and the latter is representative with T-MPLS/MPLS-TP.PTN adopts is OAM protection mechanism end to end, mainly comprises fault management (fault detect, location and announcement) and performance management function.The OAM of PPB-TE is based on the connection fault management (CFM) of IEEE802.1ag or Ethernet OAM mechanism Y.1731, the OAM of T-MPLS is based on G.8114, closely similar with OAM message function Y.1731, difference is that the OAM of T-MPLS supports layering: TMP/TMC/TMS (optional).
Based on above analysis as seen; the looped network of present PTN forward compatibility MSTP; has a plurality of PTN equipment and a plurality of MSTP equipment in this looped network simultaneously; MSTP equipment and PTN equipment in the looped network have business relations; because PTN equipment is different with the protection mechanism of MSTP equipment; therefore professional path protection be can't realize, thereby the robustness and the fail safe of network influenced.
Summary of the invention
Technical problem to be solved by this invention is the problem that the loop network system of solution PTN forward compatibility MSTP can't be realized path protection.
In order to solve the problems of the technologies described above; the technical solution adopted in the present invention provides the looped network service channel protection implementation method of a kind of PTN forward compatibility MSTP; this looped network comprises the PTN net and the MSTP net of mutual butt joint; the PTN net is made up of the PTN equipment of some mutual series connection; the MSTP net is made up of the MSTP equipment of some mutual series connection, and described service channel protection implementation method is:
If fault occurs in the PTN net, the PTN equipment at two ends, fault point inserts TMC layer AIS to the PTN in its downstream equipment respectively, the PTN equipment of receiving AIS more successively downstream equipment transparent transmission TMC layer AIS until the joint of PTN net and MSTP net, at joint, the PTN equipment of compatible MSTP business converts TMC layer AIS the passage AIS of MSTP to, and the concurrent choosing that MSTP equipment carries out passage according to passage AIS is received protection and switched;
If fault occurs in the MSTP net; the MSTP equipment at two ends, fault point inserts passage AIS to the MSTP in its downstream equipment respectively; the MSTP equipment of receiving AIS more successively downstream equipment pass-through channel AIS until the joint of MSTP net and PTN net; at joint; the professional PTN equipment of compatible MSTP converts MSTP passage AIS the AIS of TMC layer to, and the concurrent choosing that PTN equipment carries out passage according to the AIS of TMC layer is received protection and switched.
In the such scheme, the professional PTN equipment of compatible MSTP is realized the AIS that MSTP passage AIS converts the TMC layer to by the following method, MSTP passage AIS is inserted in the TMC layer of PTN equipment NNI interface.
The present invention; by TMC layer AIS and passage AIS being changed of PTN net and MSTP net joint with the professional compatible PTN equipment of MSTP; make the ais alarm index signal to be inserted in the other side's the network through joint; thereby realized professional path protection, guaranteed the path protection when PTN equipment is to MSTP equipment forward compatibility effectively.
Description of drawings
Schematic diagram when Fig. 1 is the loop network system operate as normal of PTN forward compatibility MSTP;
The path protection schematic diagram of Fig. 2 when breaking down on the path between the PTN equipment in the looped network;
The path protection schematic diagram of Fig. 3 when breaking down on the path between the MSTP equipment in the looped network;
Fig. 4 is a flow chart of the present invention.
Embodiment
The invention provides the looped network service channel protection implementation method of a kind of PTN forward compatibility MSTP, guaranteed the path protection when PTN equipment is to MSTP equipment forward compatibility.Below in conjunction with accompanying drawing the present invention is made detailed explanation.
Schematic diagram when Fig. 1 is the looped network operate as normal of PTN forward compatibility MSTP, as shown in Figure 1, this looped network comprises the PTN net and the MSTP net of mutual butt joint, the PTN net is made up of the PTN equipment of some mutual series connection, the MSTP net is made up of the MSTP equipment of some mutual series connection, A wherein, B, C, G, H, I is a PTN equipment, D, E, F is a MSTP equipment, PTN equipment C, G fits within PTN with the MSTP business with VPWS or VPLS mode, MSTP equipment E and PTN device A have business relations, A and E are professional initiating equipment and termination equipment, this looped network is provided with two service paths, and the professional of A-E and E-A transmits on two paths simultaneously, and the business that receives E with A is an example, east orientation operate as normal path is E-F-G-H-I-A, and the west is E-D-C-B-A to standby operating path; E receives the A direction, and east orientation operate as normal path is A-I-H-G-F-E, and the west is A-B-C-D-E to standby operating path.The mode that A and E adopt concurrent choosing to receive is respectively carried out the up-downgoing business; other equipment are to this vocational work passage and the straight-through transparent transmission of protection passage; therefore; the business from path E-F-G-H-I-A is received in A choosing when normal reception work, and the business from A-I-H-G-F-E is received in E choosing when normal reception work.
When in the above-mentioned looped network link failure taking place, realize professional path protection by the following method:
If fault occurs in the PTN net, the PTN equipment at two ends, fault point inserts TMC layer AIS to the PTN in its downstream equipment respectively, the PTN equipment of receiving AIS more successively downstream equipment transparent transmission TMC layer AIS until the joint of PTN net and MSTP net, at joint, the PTN equipment of compatible MSTP business converts TMC layer AIS the passage AIS of MSTP to, and the concurrent choosing that MSTP equipment carries out passage according to passage AIS is received protection and switched;
If fault occurs in the MSTP net; the MSTP equipment at two ends, fault point inserts passage AIS to the MSTP in its downstream equipment respectively; the MSTP equipment of receiving AIS more successively downstream equipment pass-through channel AIS until the joint of MSTP net and PTN net; at joint; the professional PTN equipment of compatible MSTP converts MSTP passage AIS the AIS of TMC layer to, and the concurrent choosing that PTN equipment carries out passage according to the AIS of TMC layer is received protection and switched.
With two specific embodiments said method is carried out specific description below.
The path protection schematic diagram of Fig. 2 when breaking down on the path between the PTN equipment in the looped network; as shown in Figure 2; when the PTN equipment I; during link occurs fault between the H; equipment I; H inserts the ais alarm index signal respectively and transmits downstream respectively in the TMC layer; be that equipment I transmits the ais alarm index signal to device A; equipment H transmits the ais alarm index signal to equipment G; equipment G receives at the station and extracts the ais alarm index signal after the ais alarm index signal of TMC layer and be inserted in the service channel of corresponding MSTP equipment F; equipment F passes through equipment E with this AIS again; so equipment E switches according to the ais alarm trigger protection; this business is received east orientation; the business that sends through path A-B-C-D-E is received in the i.e. choosing of E reception this moment A, and the choosing receipts path of A reception E is E-D-C-B-A.
The path protection schematic diagram of Fig. 3 when breaking down on the path between the MSTP equipment in the looped network; as shown in Figure 3; as MSTP equipment E; when breaking down between the F; equipment E; F inserts AIS channel alarm index signal and equipment transmission downstream respectively respectively; be that equipment E inserts AIS channel alarm index signal; equipment F inserts the ais alarm index signal and transmits to equipment G; because equipment G is the joint of PTN equipment and MSTP equipment; it adopts VPWS or VPLS mode with the professional adaptive access of MSTP; therefore; equipment G receives in the TMC layer of the NNI interface that it is joined behind this ais alarm signal corresponding PTN equipment H; equipment H; I passes through device A with this ais alarm; device A is received east orientation according to ais alarm to this passage; be the business that device A selects receiving unit E to send through path E-D-C-B-A, and the business that equipment E selects receiving unit A to send through path A-B-C-D-E.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (2)
1.PTN the looped network service channel of forward compatibility MSTP protection implementation method; this looped network comprises the PTN net and the MSTP net of mutual butt joint; the PTN net is made up of the PTN equipment of some mutual series connection; the MSTP net is made up of the MSTP equipment of some mutual series connection, it is characterized in that described service channel protection implementation method is:
If fault occurs in the PTN net, the PTN equipment at two ends, fault point inserts TMC layer AIS to the PTN in its downstream equipment respectively, the PTN equipment of receiving AIS more successively downstream equipment transparent transmission TMC layer AIS until the joint of PTN net and MSTP net, at joint, the PTN equipment of compatible MSTP business converts TMC layer AIS the passage AIS of MSTP to, and the concurrent choosing that MSTP equipment carries out passage according to passage AIS is received protection and switched;
If fault occurs in the MSTP net; the MSTP equipment at two ends, fault point inserts passage AIS to the MSTP in its downstream equipment respectively; the MSTP equipment of receiving AIS more successively downstream equipment pass-through channel AIS until the joint of MSTP net and PTN net; at joint; the professional PTN equipment of compatible MSTP converts MSTP passage AIS the AIS of TMC layer to, and the concurrent choosing that PTN equipment carries out passage according to the AIS of TMC layer is received protection and switched.
2. the looped network service channel protection implementation method of PTN forward compatibility MSTP as claimed in claim 1; it is characterized in that the professional PTN equipment of compatible MSTP realizes the AIS that MSTP passage AIS converts the TMC layer to by the following method, MSTP passage AIS is inserted in the TMC layer of PTN equipment NNI interface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102502533A CN101729350B (en) | 2009-12-11 | 2009-12-11 | Realizing method of PTN forward compatible MSTP ring network service channel protection |
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| CN2009102502533A CN101729350B (en) | 2009-12-11 | 2009-12-11 | Realizing method of PTN forward compatible MSTP ring network service channel protection |
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| CN101729350A true CN101729350A (en) | 2010-06-09 |
| CN101729350B CN101729350B (en) | 2011-08-31 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102843260A (en) * | 2012-09-05 | 2012-12-26 | 烽火通信科技股份有限公司 | Channel protection method of looped network system with IP RAN (Internet Protocol-Radio Access Network) forward compatible with MSTP (Multi-Service Transport Platform) |
| CN102916843A (en) * | 2012-11-19 | 2013-02-06 | 烽火通信科技股份有限公司 | Link protection implementation method for bearing point-to-point private line service by PTN (Packet Transport Network) network |
| CN102916842A (en) * | 2012-11-06 | 2013-02-06 | 烽火通信科技股份有限公司 | Method for implementing PTN (Packet Transport Network) equipment double-returning protection by overlaying various protection modes |
| WO2013026380A1 (en) * | 2011-08-25 | 2013-02-28 | 中兴通讯股份有限公司 | Method and device for realizing collaborative protection of ptn device and mstp device |
| CN103248508A (en) * | 2012-02-09 | 2013-08-14 | 中兴通讯股份有限公司 | Port protecting method, device and system |
| CN105634647A (en) * | 2016-01-07 | 2016-06-01 | 烽火通信科技股份有限公司 | Method and system for realizing forward compatibility of MSTP (Multi-Service Transfer Platform) equipment to PTN (Packet Transport Network) equipment platform |
| CN105871613A (en) * | 2016-03-31 | 2016-08-17 | 国网山西省电力公司信息通信分公司 | E1 service protection method and system |
| US11003361B2 (en) | 2017-08-04 | 2021-05-11 | Micron Technology, Inc. | Wear leveling |
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2009
- 2009-12-11 CN CN2009102502533A patent/CN101729350B/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102957554A (en) * | 2011-08-25 | 2013-03-06 | 中兴通讯股份有限公司 | Method and device for achieving coordinative protection of PTN (packet transport network) equipment and MSTP (multi-service transport platform) equipment |
| CN102957554B (en) * | 2011-08-25 | 2017-09-29 | 中兴通讯股份有限公司 | Implementation method and device that PTN device is protected with MSTP equipment collaborations |
| WO2013026380A1 (en) * | 2011-08-25 | 2013-02-28 | 中兴通讯股份有限公司 | Method and device for realizing collaborative protection of ptn device and mstp device |
| CN103248508A (en) * | 2012-02-09 | 2013-08-14 | 中兴通讯股份有限公司 | Port protecting method, device and system |
| CN102843260B (en) * | 2012-09-05 | 2015-04-08 | 烽火通信科技股份有限公司 | Channel protection method of looped network system with IP RAN (Internet Protocol-Radio Access Network) forward compatible with MSTP (Multi-Service Transport Platform) |
| CN102843260A (en) * | 2012-09-05 | 2012-12-26 | 烽火通信科技股份有限公司 | Channel protection method of looped network system with IP RAN (Internet Protocol-Radio Access Network) forward compatible with MSTP (Multi-Service Transport Platform) |
| CN102916842A (en) * | 2012-11-06 | 2013-02-06 | 烽火通信科技股份有限公司 | Method for implementing PTN (Packet Transport Network) equipment double-returning protection by overlaying various protection modes |
| CN102916843B (en) * | 2012-11-19 | 2015-09-30 | 烽火通信科技股份有限公司 | PTN network is utilized to carry the link protection implementation method of point-to-point private line service |
| CN102916843A (en) * | 2012-11-19 | 2013-02-06 | 烽火通信科技股份有限公司 | Link protection implementation method for bearing point-to-point private line service by PTN (Packet Transport Network) network |
| CN105634647A (en) * | 2016-01-07 | 2016-06-01 | 烽火通信科技股份有限公司 | Method and system for realizing forward compatibility of MSTP (Multi-Service Transfer Platform) equipment to PTN (Packet Transport Network) equipment platform |
| WO2017118151A1 (en) * | 2016-01-07 | 2017-07-13 | 烽火通信科技股份有限公司 | Method and system for implementing forward compatibility of ptn device platform to mstp device |
| CN105634647B (en) * | 2016-01-07 | 2018-01-02 | 烽火通信科技股份有限公司 | Realize the method and system of PTN device platform forward compatibility MSTP equipment |
| CN105871613A (en) * | 2016-03-31 | 2016-08-17 | 国网山西省电力公司信息通信分公司 | E1 service protection method and system |
| US11003361B2 (en) | 2017-08-04 | 2021-05-11 | Micron Technology, Inc. | Wear leveling |
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Granted publication date: 20110831 Termination date: 20201211 |