CN101291191A - Linear protecting system and method for optical transmitting network - Google Patents
Linear protecting system and method for optical transmitting network Download PDFInfo
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- CN101291191A CN101291191A CN 200810067644 CN200810067644A CN101291191A CN 101291191 A CN101291191 A CN 101291191A CN 200810067644 CN200810067644 CN 200810067644 CN 200810067644 A CN200810067644 A CN 200810067644A CN 101291191 A CN101291191 A CN 101291191A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000003287 optical effect Effects 0.000 title claims abstract description 18
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 31
- 230000011664 signaling Effects 0.000 claims description 29
- 230000005540 biological transmission Effects 0.000 claims description 19
- 239000013307 optical fiber Substances 0.000 claims description 11
- 238000011084 recovery Methods 0.000 claims description 4
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0057—Operations, administration and maintenance [OAM]
- H04J2203/006—Fault tolerance and recovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability
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Abstract
The invention discloses a system and a method of linear protection for an optical transport network. The system comprises an upstream terminal node, a downstream terminal node, a protective path between the upstream terminal node and the downstream terminal node, and one or more than one operating path, wherein, the protective path has an intermediate node. The technical proposal expands the application range of the linear protection.
Description
Technical field
The present invention relates to OTN (Optical Transmission Network, optical transfer network) field, relate in particular to linear protecting system and the method for a kind of OTN.
Background technology
At present, the linear protection of OTN is basis suggestion G.873.1, adopts ODU (OpticalData Unit, Optical Channel Data Unit-k) linear 1+1 and 1: n (n is a natural number) protection type, and these two kinds protection types mainly provide point-to-point protection mechanism.
Fig. 1 be G.873.1 in the linear 1+1 protection system schematic of definition, this protection system comprises the upstream extremity node---network element A, downstream node---network element B, 1 operating path and 1 protection path; Network just often, after Working service uploaded to network element A, network element A transmitted Working service by operating path and protection path to network element B simultaneously, and network element B receives Working service at operating path; After network failure causes operating path to lose efficacy; network element A sends APS (Automatic Protection Switching, APS) signaling to network element B, and network element B then switches switch according to this APS signaling switching; receive Working service in the protection path, thereby realize protection Working service.
Fig. 2 be G.873.1 in the linearity 1 of definition: n protection system schematic diagram, this protection system comprises the upstream extremity node---network element A, downstream node---network element B, n bar operating path and 1 protection path; Network just often, after each Working service uploaded to network element A respectively, network element A was sent to network element B by the corresponding work path with Working service, simultaneously, transmitted not shielded extra traffic by the protection path; After network failure causes certain bar operating path to lose efficacy; network element A unloads extra traffic; concurrent corresponding work business on this operating path and protection path; send the APS signaling that bridge joint is switched instruction to network element B simultaneously; network element B then switches switch according to this APS signaling switching; receive the corresponding work business in the protection path, thereby realize protection Working service.
From foregoing description as can be seen, G.873.1 effect and the function of end node in linear protecting system only stipulated in suggestion, the function of intermediate node do not set forth.Therefore, exist in the protection system of ADM (Add Drop Multiplexer, add-drop multiplexer) intermediate node in the protection path, intermediate node can't be cooperated with end node and be finished the defencive function of whole system, thereby has limited the scope of application of linear protection.
Summary of the invention
The technical problem to be solved in the present invention provides linear protecting system and the method for a kind of OTN, has expanded the scope of application of linear protection.
The technical solution adopted for the present invention to solve the technical problems is:
The linear protecting system of a kind of OTN comprises upstream extremity node, downstream node, described upstream extremity node and described downstream internodal protection path and one or more than one operating path, and there is intermediate node in described protection on the path.
In the such scheme; described operating path realizes that by described upstream extremity node and the internodal optical fiber of described downstream described protection path is realized by the optical fiber between described upstream extremity node and described intermediate node and described downstream node and the described intermediate node.
The linear protection method of the linear protecting system of a kind of OTN, when operating path broke down, described linear protecting system was realized the linear protection of described OTN by following steps:
A, described downstream node send the bridge joint switching request by described intermediate node to described upstream extremity node;
B, described upstream extremity node optionally carry out bridge operation after receiving described bridge joint switching request, and switch instruction to described intermediate node transmission bridge joint;
C, described intermediate node receive after described bridge joint switches instruction, optionally carry out the break-through operation, and described bridge joint is switched instruction are transmitted to described downstream node;
D, described downstream node receive after described bridge joint switches instruction, carry out switching operation to receive the Working service that needs by described operating path transmission by described protection path.
In the such scheme, among the described step b, described linear protecting system is 1: during n protection type, described upstream extremity node carries out following bridge operation after receiving described bridge joint switching request: unload the extra traffic of described protection path transmission, and with described Working service and be dealt into described protection path and described fail operation path; When described linear protecting system was the 1+1 protection type, described upstream extremity node need not to carry out bridge operation after receiving described bridge joint switching request.
In the such scheme, among the described step c, described linear protecting system is 1: during n protection type, described intermediate node receives and carries out following break-through operation after described bridge joint is switched instruction: cancel the transmission of described extra traffic in described protection path, transmit described Working service in described protection path; When described linear protecting system was the 1+1 protection type, described intermediate node received and need not to carry out the break-through operation after described bridge joint is switched instruction.
In the such scheme, described bridge joint switching request and bridge joint are switched instruction and are transmitted by the APS signaling.
In the such scheme, after the described steps d, after described operating path recovered normally, described linear protecting system was realized the recovery of described OTN linear protection by following steps:
E, described downstream node send Wait-to-Restore message by described intermediate node to described upstream extremity node;
After the stand-by period that f, process are preset, described downstream node sends idle message by described intermediate node to described upstream extremity node, after described upstream extremity node receives described idle message, optionally cancel the bridge operation that has carried out, and send idle message to described intermediate node;
After g, described intermediate node receive described idle message, optionally cancel the break-through operation of having carried out, and described idle message is transmitted to described downstream node;
After h, described downstream node receive described idle message, cancel the switching operation that has carried out and receive described Working service by recovering normal operating path again.
In the such scheme, among the described step f, described linear protecting system is 1: during n protection type, described upstream extremity node carries out the following bridge operation of cancelling after receiving described idle message: load described extra traffic in described protection path; When described linear protecting system was the 1+1 protection type, described upstream extremity node need not to cancel bridge operation after receiving described idle message.
In the such scheme, in the described step g, described linear protecting system is 1: during n protection type, described intermediate node carries out the following break-through operation of cancelling after receiving described idle message: cancel the transmission of described Working service in described protection path, transmit described extra traffic in described protection path; When described linear protecting system was the 1+1 protection type, described intermediate node need not to cancel the break-through operation after receiving described idle message.
In the such scheme, described Wait-to-Restore message and idle message are transmitted by the APS signaling.
Beneficial effect of the present invention mainly shows: linear protecting system provided by the invention has increased the intermediate node in protection path; when utilizing this linear protecting system to carry out linear protection; cooperate with intermediate node by end node and to finish the defencive function of whole system; thereby the perfect linear protecting system of OTN has been expanded the scope of application of linear protection.
Description of drawings
Fig. 1 be G.873.1 in the linear protecting system schematic diagram of 1+1 protection type of definition;
Fig. 2 is 1 of G.873.1 middle definition: the linear protecting system schematic diagram of n protection type;
Fig. 3 is the linear protecting system schematic diagram of the present invention's protection in 1: 1 type or 1+1 protection type;
Fig. 4 is the linear protection method flow diagram of OTN of the present invention.
Embodiment
Fig. 1, Fig. 2 are described in background technology, repeat no more herein.The invention will be further described below in conjunction with other accompanying drawing.
The structure of the linear protecting system of protecting type and 1+1 protection type at 1: 1 of OTN is identical, as shown in Figure 3, linear protecting system comprises between operating path between upstream extremity node network element A, downstream node network element B, intermediate node network element C, network element A and network element B and network element A and network element B the protection path by network element C; Wherein, network element A comprises source port PA01, PA02, working port PA1 and protection port PA2; Network element B comprises place port PB01, PB02, working port PB1 and protection port PB2; Network element C comprises that east orientation port PC1 and west are to port PC2; Operating path and protection path are passed through the working optical fibre between respective network elements respectively and are protected the connection of optical fiber 1, protection optical fiber 2 to realize.
In practice, can set up above-mentioned linear protecting system by the following steps configuration:
At first, the optical fiber of setting up between network element connects, and sets up the connection of the working optical fibre between network element A and the network element B that is:, set up the connection of the protection optical fiber 1 between network element A and the network element C and set up network element B and network element C between the connection of protection optical fiber 2;
Then, the configuration linear protecting system comprises following three: 1, network element A, the network element B and the network element C that comprise of configuration-system; 2, the protection type of configuration linear protecting system can also can be the 1+1 protection type for 1: 1 protection type; 3, the node type of configuration network element A, network element B is an end node, and the node type of network element C is an intermediate node;
At last, on corresponding path, dispose corresponding business, that is: if the protection type of system configuration is the 1+1 protection type, then dispose from network element A source port PA01 to network element B place port PB01 Working service, and transmit this Working service simultaneously on the protection path, but the obstructed port PB02 that passes the night of network element B receives this Working service; If the protection type of system configuration is 1: 1 protection type, then dispose from network element A source port PA01 to network element B place port PB01 Working service, and network element A source port PA02 protects the extra traffic in path to network element B place port PB02.
With reference to Fig. 4, the linear protection method of a kind of OTN realizes by above-mentioned linear protecting system, when operating path breaks down, specifically realizes the linear protection of OTN by following steps:
S401: network element B sends the APS signaling of bridge joint switching request to network element A by network element C;
S402: network element A optionally carries out bridge operation after receiving the APS signaling of bridge joint switching request, and sends the APS signaling that bridge joint is switched instruction to network element C;
Network element A optionally carries out bridge operation and is meant: when linear protecting system is 1: 1 protection type, network element A receives and carries out following bridge operation after the APS signaling of bridge joint switching request: the extra traffic of unloading protecting path transmission, and with Working service and be dealt into protection path and fail operation path; When linear protecting system was the 1+1 protection type, Working service was in protection path transmission, so network element A need not to carry out bridge operation after receiving the APS signaling of bridge joint switching request;
S403: network element C receives after bridge joint switches the APS signaling of instruction, optionally carries out the break-through operation, and the APS signaling that bridge joint is switched instruction is transmitted to network element B;
Network element C optionally carries out the break-through operation and is meant: when linear protecting system is 1: 1 protection type, network element C receives bridge joint and switches and carry out following break-through operation after the APS signaling of instruction: the cancellation extra traffic is in the transmission in, protection path, at protection path transmission Working service; When linear protecting system was the 1+1 protection type, Working service need not carry out break-through operation so network element C receives after bridge joint is switched the APS signaling of instruction in the transmission of protection path;
S404: network element B receives after bridge joint switches the APS signaling of instruction, carries out switching operation, receives Working service by place port PB02, thereby realized that by the protection path transmission of Working service receives when the operating path fault;
After operating path recovered normally, linear protecting system continued to realize by following steps the recovery of OTN linear protection:
S405: network element B sends the APS signaling of Wait-to-Restore by network element C to network element A, and picks up counting;
S406: after the default stand-by period, network element B sends idle APS signaling by network element C to network element A, and network element A optionally cancels the bridge operation that has carried out after receiving idle APS signaling, and sends idle APS signaling to network element C;
Network element A optionally cancels the bridge operation that has carried out and is meant: when linear protecting system was 1: 1 protection type, network element A carried out the following bridge operation of cancelling after receiving idle APS signaling: reload extra traffic in the protection path; When linear protecting system was the 1+1 protection type, network element A need not to cancel bridge operation after receiving idle APS signaling;
S407: after network element C receives idle APS signaling, optionally cancel the break-through operation of having carried out, and the APS signaling of free time is transmitted to network element B;
Network element C optionally cancels the break-through operation of having carried out and is meant: when linear protecting system is 1: 1 protection type, network element C carries out the following break-through operation of cancelling after receiving idle APS signaling: the cancellation Working service is in the transmission in protection path, at protection path transmission extra traffic; When linear protecting system was the 1+1 protection type, network element C need not to cancel the break-through operation after receiving idle APS signaling;
S408: network element B cancels the switching operation that has carried out after receiving idle APS signaling, again by receiving Working service by place port PB01.
So far, linear protecting system has been realized linear protection and the recovery of OTN.
The above is embodiments of the invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (10)
1, a kind of linear protecting system of optical transfer network; comprise upstream extremity node, downstream node, described upstream extremity node and described downstream internodal protection path and one or more than one operating path, it is characterized in that: there is intermediate node in described protection on the path.
2, the linear protecting system of optical transfer network as claimed in claim 1; it is characterized in that: described operating path realizes that by described upstream extremity node and the internodal optical fiber of described downstream described protection path is realized by the optical fiber between described upstream extremity node and described intermediate node and described downstream node and the described intermediate node.
3, the linear protection method of the linear protecting system of optical transfer network as claimed in claim 1 is characterized in that, when operating path broke down, described linear protecting system was realized the linear protection of described optical transfer network by following steps:
A, described downstream node send the bridge joint switching request by described intermediate node to described upstream extremity node;
B, described upstream extremity node optionally carry out bridge operation after receiving described bridge joint switching request, and switch instruction to described intermediate node transmission bridge joint;
C, described intermediate node receive after described bridge joint switches instruction, optionally carry out the break-through operation, and described bridge joint is switched instruction are transmitted to described downstream node;
D, described downstream node receive after described bridge joint switches instruction, carry out switching operation to receive the Working service that needs by described operating path transmission by described protection path.
4, the linear protection method of optical transfer network as claimed in claim 3, it is characterized in that, among the described step b, when described linear protecting system is 1:n protection type, described upstream extremity node carries out following bridge operation after receiving described bridge joint switching request: unload the extra traffic of described protection path transmission, and with described Working service and be dealt into described protection path and described fail operation path; When described linear protecting system was the 1+1 protection type, described upstream extremity node need not to carry out bridge operation after receiving described bridge joint switching request.
5, as the linear protection method of claim 3 or 4 described optical transfer networks, it is characterized in that, among the described step c, when described linear protecting system is 1:n protection type, described intermediate node receives and carries out following break-through operation after described bridge joint is switched instruction: cancel the transmission of described extra traffic in described protection path, transmit described Working service in described protection path; When described linear protecting system was the 1+1 protection type, described intermediate node received and need not to carry out the break-through operation after described bridge joint is switched instruction.
6, the linear protection method of optical transfer network as claimed in claim 3 is characterized in that: described bridge joint switching request and bridge joint are switched instruction and are transmitted by the APS signaling.
7, the linear protection method of optical transfer network as claimed in claim 3 is characterized in that, after the described steps d, after described operating path recovered normally, described linear protecting system was realized the recovery of described optical transfer network linear protection by following steps:
E, described downstream node send Wait-to-Restore message by described intermediate node to described upstream extremity node;
After the stand-by period that f, process are preset, described downstream node sends idle message by described intermediate node to described upstream extremity node, after described upstream extremity node receives described idle message, optionally cancel the bridge operation that has carried out, and send idle message to described intermediate node;
After g, described intermediate node receive described idle message, optionally cancel the break-through operation of having carried out, and described idle message is transmitted to described downstream node;
After h, described downstream node receive described idle message, cancel the switching operation that has carried out and receive described Working service by recovering normal operating path again.
8, the linear protection method of optical transfer network as claimed in claim 7, it is characterized in that: among the described step f, when described linear protecting system was 1:n protection type, described upstream extremity node carried out the following bridge operation of cancelling after receiving described idle message: load described extra traffic in described protection path; When described linear protecting system was the 1+1 protection type, described upstream extremity node need not to cancel bridge operation after receiving described idle message.
9, as the linear protection method of claim 7 or 8 described optical transfer networks, it is characterized in that: in the described step g, when described linear protecting system is 1:n protection type, described intermediate node carries out the following break-through operation of cancelling after receiving described idle message: cancel the transmission of described Working service in described protection path, transmit described extra traffic in described protection path; When described linear protecting system was the 1+1 protection type, described intermediate node need not to cancel the break-through operation after receiving described idle message.
10, the linear protection method of optical transfer network as claimed in claim 7 is characterized in that: described Wait-to-Restore message and idle message are transmitted by the APS signaling.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810067644 CN101291191A (en) | 2008-06-06 | 2008-06-06 | Linear protecting system and method for optical transmitting network |
| PCT/CN2009/071998 WO2009146632A1 (en) | 2008-06-06 | 2009-05-26 | Linear protection system, linear protection and restoration method for optical transmission network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810067644 CN101291191A (en) | 2008-06-06 | 2008-06-06 | Linear protecting system and method for optical transmitting network |
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| CN101291191A true CN101291191A (en) | 2008-10-22 |
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| WO (1) | WO2009146632A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009146632A1 (en) * | 2008-06-06 | 2009-12-10 | 中兴通讯股份有限公司 | Linear protection system, linear protection and restoration method for optical transmission network |
| CN101944950A (en) * | 2009-07-06 | 2011-01-12 | 中兴通讯股份有限公司 | Processing method and device for loading extra service in optical transport network (OTN) |
| CN101771610B (en) * | 2009-12-24 | 2012-05-09 | 中兴通讯股份有限公司 | Transport multiprotocol label switching network (T-MPLS) system and link protection method |
| CN101521554B (en) * | 2009-03-27 | 2012-08-22 | 华为技术有限公司 | Loop circuit switching method, communication system and related equipment |
| CN102694683A (en) * | 2012-05-22 | 2012-09-26 | 华为技术有限公司 | Service switching method, network management server and communication system |
| CN102611604B (en) * | 2011-01-19 | 2019-01-15 | 中兴通讯股份有限公司 | One kind sharing netted protection realization method and system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198423C (en) * | 1996-04-23 | 2005-04-20 | 株式会社日立制作所 | Self-healing network, method for transmission line switching thereof, and transmission equipment thereof |
| JP2005012306A (en) * | 2003-06-17 | 2005-01-13 | Mitsubishi Electric Corp | Node device |
| CN101291191A (en) * | 2008-06-06 | 2008-10-22 | 中兴通讯股份有限公司 | Linear protecting system and method for optical transmitting network |
-
2008
- 2008-06-06 CN CN 200810067644 patent/CN101291191A/en active Pending
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2009
- 2009-05-26 WO PCT/CN2009/071998 patent/WO2009146632A1/en active Application Filing
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009146632A1 (en) * | 2008-06-06 | 2009-12-10 | 中兴通讯股份有限公司 | Linear protection system, linear protection and restoration method for optical transmission network |
| CN101521554B (en) * | 2009-03-27 | 2012-08-22 | 华为技术有限公司 | Loop circuit switching method, communication system and related equipment |
| CN101944950A (en) * | 2009-07-06 | 2011-01-12 | 中兴通讯股份有限公司 | Processing method and device for loading extra service in optical transport network (OTN) |
| WO2011003245A1 (en) * | 2009-07-06 | 2011-01-13 | 中兴通讯股份有限公司 | Extra traffic load processing method and apparatus in optical transmission network |
| CN101944950B (en) * | 2009-07-06 | 2014-01-01 | 中兴通讯股份有限公司 | Processing method and device for loading extra service in optical transport network (OTN) |
| CN101771610B (en) * | 2009-12-24 | 2012-05-09 | 中兴通讯股份有限公司 | Transport multiprotocol label switching network (T-MPLS) system and link protection method |
| CN102611604B (en) * | 2011-01-19 | 2019-01-15 | 中兴通讯股份有限公司 | One kind sharing netted protection realization method and system |
| CN102694683A (en) * | 2012-05-22 | 2012-09-26 | 华为技术有限公司 | Service switching method, network management server and communication system |
| CN102694683B (en) * | 2012-05-22 | 2016-09-28 | 华为技术有限公司 | A kind of business reverse method, NM server and communication system |
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| Publication number | Publication date |
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| WO2009146632A1 (en) | 2009-12-10 |
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