CN101159494A - Service protecting method for automatic exchange optical network - Google Patents
Service protecting method for automatic exchange optical network Download PDFInfo
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- CN101159494A CN101159494A CNA2007101655161A CN200710165516A CN101159494A CN 101159494 A CN101159494 A CN 101159494A CN A2007101655161 A CNA2007101655161 A CN A2007101655161A CN 200710165516 A CN200710165516 A CN 200710165516A CN 101159494 A CN101159494 A CN 101159494A
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Abstract
The invention discloses a method for service protection in an automatic exchange optical network, which comprises: searching the idle protection connections other than the above partial connection in the protection group when needing to switch a work service on a partial connection in the connection of the protection group; switching the work service on the partial connection onto the idle protection connection if the idle protection connection is found; otherwise, switching based on the priority of the work service on the partial connection and the priority of work services on other protection connections except for the partial connection mentioned above. The invention can completely protect the services with high priority in the automatic exchange optical network rapidly and efficiently in limited network resources, thereby complying with the service level agreement (SLA).
Description
Technical field
The present invention relates to the communications field, and especially, relate to a kind of ASON service protecting method of (Automatically Switching Optical Network is called for short ASON) that is used for.
Background technology
ASON is meant the automatic switched transport network of SDH (Synchronous Digital Hierarchy) (SDH) transmission net that is applied to G.803 define and the optical transfer network that G.872 defines.This network comprises three planes: transmit plane, control plane and management plane.
Self-healing ability is an important feature of optical-fiber network; protection in the conventional optical network can be divided into 1+1 trail protection (trail protection) protection, 1:N trail protection, M:N trail protection, SNCP) subnetwork connection protection, be called for short SNCP), 1+1 linear multiplex section protection, 1:N linear multiplex section protection, M:N linear multiplex section protection, two fibre two-way multi-section shared protection ring and Four-fiber MS shared protection rings.More than the detailed description of all kinds of protections see International Telecommunications Union's (InternationalTelecommunication Union is called for short ITU) relevant criterion G.841, G.842, G.808.1, G.873.1, G.808.2 and G.873.2, do not repeat them here.
Traditional optical-fiber network is compared, and ASON has introduced control plane, and this execution mode of switching for protection has brought variation.The enforcement different with conventional optical network, that the control plane that increases newly in the ASON network can the participation protective switch function.For example, in ASON, can adopt by the control plane configuration, and realize various trail protections or SNCP (SNCP) by transmitting the mode of carrying out on the plane.
At present; though the optical communication industry has progressively been found the necessity of control plane participation protective and specific implementation both at home and abroad; but corresponding research only tentatively begins; prior art is at the method for the protection of the protection group in the ASON; only there is following solution; in the service protecting method of the CN200510036205 that application number is; business is adopted service aisle and the protected mode of protecting channel protection group, also proposed the protection group of configuration 1:1 and the method for business being protected in conjunction with the fast quick-recovery in the ASON network dynamics.
Yet, there is defective above the utilization that is configured in resource of 1:1 protection group, await improving and development.At present, do not propose as yet to save the technical scheme that Limited resources can effectively be protected high-priority service among the ASON again.
Summary of the invention
Consider the problems referred to above and make the present invention that for this reason, main purpose of the present invention is to provide a kind of service protection scheme that is used for ASON.
According to embodiments of the invention, provide a kind of service protecting method that is used for ASON.
This method comprises: step S102, and when the Working service that need connect the part in the middle of the connection of protection group was switched, the free time protection of searching in the protection group except above-mentioned part connects connected; And step S104, connect if find idle protection, then the Working service in the above-mentioned part connection is switched to idle protection and connects; Otherwise connect according to above-mentioned part and remove other protection connecting of above-mentioned part in the connection of the priority that goes up Working service and protection group and connect upward priority of Working service and switch.
Wherein, the connection in the protection group comprises: protection connects with work and is connected.In step S104, connecting in above-mentioned part is that protection connects, and professional type is under the professional situation of protection on it, does not switch.
In addition, in step S104, further comprise: steps A, under the situation that does not find idle protection connection, the priority of Working service is lower than the low priority connection that above-mentioned part connects the priority that goes up Working service if deposit thereon during other protection connects, and then the switching services that above-mentioned part is connected connects to low priority; And step B, if connecting the priority that goes up Working service, other protection is higher than the upward professional priority of above-mentioned part connection, then wait for idle protection connection.
Wherein, in steps A, preferentially the Working service that above-mentioned part is connected is switched in the shared protection connection of the minimum Working service of low priority connection medium priority.
In addition, before step S102, can further comprise: change information by every in the connection of protection group alarm that connects the network element monitoring connection of source end.And, after switching,, then cancel and switch if alarm disappears.
In addition, in the method, the protection group is a M:N protection group, and the connection in the protection group has identical source end and destination.And it is different that the work of protection group connects the priority that goes up Working service.
By technique scheme of the present invention, can be in limited Internet resources the high business of ASON medium priority is protected fully rapidly and efficiently, thereby realize SLA preferably (SLA).
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's an above-mentioned part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the service protecting method that is used for ASON of the embodiment of the invention;
Fig. 2 is the schematic flow sheet according to the processing example 1 of the method for the embodiment of the invention;
Fig. 3 is the schematic flow sheet according to the processing example 2 of the method for the embodiment of the invention;
Fig. 4 is the schematic flow sheet according to the processing example 3 of the method for the embodiment of the invention;
Fig. 5 is the schematic flow sheet according to the processing example 4 of the method for the embodiment of the invention;
Fig. 6 is an ASON network control flat topology schematic diagram; And
Fig. 7 is that ASON network control in-plane shown in Figure 5 is divided the logical relation schematic diagram that connects.
Embodiment
The service protecting method of a kind of ASON of being used for is provided in the present embodiment.This method can be under the Internet resources condition of limited, is configured to the M:N protection by the connection with the professional place of different priorities and organizes and make full use of Internet resources, for the high business of priority provides in real time, protection efficiently.Describe present embodiment below with reference to accompanying drawings in detail.
As shown in Figure 1, the service protecting method that is used for ASON according to the embodiment of the invention comprises: step S102, when the Working service that need connect the part in the middle of the connection of protection group was switched, the free time protection of searching in the protection group except above-mentioned part connects connected; And step S104, connect if find idle protection, then the Working service in the above-mentioned part connection is switched to idle protection and connects; Otherwise connect the priority of removing the Working service that may carry in other protection connection connecting of above-mentioned part in the connection of the priority that goes up Working service and protection group switches according to above-mentioned part.
Wherein, above-mentioned protection group is a M:N protection group, and the connection in the protection group has identical source end and destination.And it is different that the work of protection group connects the priority that goes up Working service.Connection in the protection group comprises: protection connects with work and is connected.And professional type comprises: protection business and Working service.
In step S104, connecting in above-mentioned part is that protection connects, and professional type is under the professional situation of protection on it, does not switch.
In addition, in step S104, further comprise: steps A, under the situation that does not find idle protection connection, the priority of Working service is lower than the low priority connection that above-mentioned part connects the priority that goes up Working service if deposit thereon during other protection connects, and then the switching services that above-mentioned part is connected connects to low priority; And step B, if connecting the priority that goes up Working service, other protection is higher than the upward professional priority of above-mentioned part connection, then wait for idle protection connection.
Wherein, in steps A, preferentially the Working service that above-mentioned part is connected is switched in the shared protection connection of the minimum Working service of low priority connection medium priority.
In addition; before step S102; can further comprise: the warning information of every connection by every in the connection of protection group network element device monitoring and protecting group that connects the source end; and the connection of the warning information correspondence of judgement change is alarmed when warning information changes, and the connection that alarm takes place is switched.And, after switching,, then cancel and switch if alarm disappears.
That is to say, before realizing the present invention, at first, need to set up successful M+N bar connection and be configured to M:N protection group with identical A/Z end (A represents the source end, and Z represents destination).M+N bar in the protection group connects can belong to identical or different business.The last loaded service of N bar work connection has different priority in the protection group.
The trigger condition that protection is switched comprises: webmaster issues to switch order and detect and connects alarm, is example with detected connection alarm as the incentive condition of switching below, is illustrated switching to handle.
When realizing protection reverse method according to the embodiment of the invention, reality can specifically comprise following processing:
(1) the A end network element that connects is responsible for detecting alarm, if monitor the information that alarm changes, forwards (2) to; Otherwise A end network element continues the monitoring warning information;
(2) take out this and alarm pairing connection, connect, then handle forwarding 3 to if this connection is work; Connect if this connection is protection, then handle forwarding (7) to;
(3) produce alarm if work connects to go up, break down, forward (4) to; If the alarm on work connects disappears, forward (5) to;
(4) protection of searching in this M:N protection group connects, if should not be used to protect connecting of Working service in addition in the protection group with nowhere to turn to alert protection, then will produce Working service that the work of warning information connects and be switched to nowhere to turn to alert free time protection and connect, and forward (10) to; If connecting, all protections in should the protection group all have been used to protect Working service, the connection that perhaps is not used to protect all has been in malfunction (promptly, there be not available connecting) with nowhere to turn to alert idle protection, the priority of the Working service that the priority of the Working service on then relatively fail operation connects is connected with the protection in the protection group, if the priority height of the Working service that the priority of the Working service that all protections connect all connects than fail operation, then write down the fault message (from alarm information, can obtain fault message) that this work connects, and wait for that idle protection connects, and forwards (10) to; Otherwise the protection of cancelling the protection connection work connection that upward priority is minimum is switched, and the switching services that fail operation is connected forwards (10) to this protection connection;
(5) whether the Working service that connects of inspection work has been switched to protection and has connected, and connects if be switched to protection, then cancels this and switches, and forward (6) to; If the Working service on it is not switched, then upgrade the fault message that this work connects, forward (10) to;
(6) whether there is work to connect in the check protection group and has fault, exist fault and the Working service on it all not to be switched in the protection connection if there are many work to connect, then that priority is the highest switching services connects to the protection that frees out, and forwards (10) to; If do not have the Working service that to switch, then directly forward (10) to;
(7) produce alarm if protection connects to go up, forward (8) to; Go up the alarm disappearance if protection connects, forward (9) to;
(8) if protecting to connect is used for the protection Working service, whether idle connecting with nowhere to turn to alert protection is arranged in the then check protection group, connect if having then the Working service in this error protection connection is switched to trouble-free protection; Otherwise cancel switching in this error protection connection, write down original work and connect fault message, forward (10) to; Go up no Working service if protection connects, then write down this warning information; And forward (10) to;
(9) upgrade the warning information that this protection connects, whether there is work to connect in the check protection group and has fault, exist fault and the Working service on it all not to be switched in the protection connection if there are many work to connect, the protection that then that priority is the highest switching services disappears to alarm connects, and forwards (10) to; If do not have the Working service that to switch, then directly forward (10) to;
(10) switch end.
Below in conjunction with concrete scene the embodiment of the invention is described.
Fig. 2 is that the flow chart of implementation method was switched in the protection of M:N protection group after network element A detected work and connect to go up produces alarm.Fig. 3 is that the flow chart of implementation method was switched in the protection of M:N protection group after network element A detected the alarm information that work connects.Fig. 4 is that the flow chart of implementation method was switched in the protection of M:N protection group after network element A detected protection and connect to go up produces alarm.Fig. 5 is that network element A detects protection and connect to go up after alarm disappears, and the flow chart of implementation method is switched in the protection of M:N protection group.Fig. 6 is the mesh network schematic diagram that comprises 7 network elements.Fig. 7 is that the protection linking number M value in the M:N protection group is 2, and it is the logical schematic of the connection in the protection group in 4 o'clock that work connects the N value, and wherein the path represented of W1 is: A-Z; The path that W2 represents is: A-B-Z; The path that W3 represents is: A-B-C-Z; The path that W4 represents is: A-B-C-D-Z; The path that P1 represents is: A-E-F-Z; The path that P2 represents is: A-F-Z; Article four, the priority relationship of the entrained business on the operating path is: W1＞W2＞W3＞W4.
Example 1: network element detects the warning information that work connects
In conjunction with Fig. 2, Fig. 6 and Fig. 7, making works in the protection group connects business on the W2 and has been switched to protection and connects on the P1, work connect on the W4 switching services to protection connect on the P2; This moment, A end network element detected work connection W1 fault.To describe in detail when A end network element detects the warning information that work connects with this scene below, M:N protection group is implemented the concrete steps that protection is switched:
Step 21: whether search out of order work and connect W1, searching in the protection group has idle protection to connect;
Step 22: do not have idle protection to connect in the protection group, relatively the priority height of the Working service on W1 and W2, the W4;
Step 23: protection connects goes up the existence Working service lower than the priority of the business on the W1, finds out protection and connects the minimum Working service of medium priority, is the Working service on the W4;
Step 24: the Working service on the P2 cancelled switch, this switching services returns on the W4;
Step 25: the Working service on the W1 is switched on the P2.
Example 2: the fault on work connects disappears
In conjunction with Fig. 3, Fig. 6 and Fig. 7, in this example, making works in the protection group connect on the W1 switching services to protection connect on the P2, work connect on the W2 switching services to protection connect on the P1, work connects and all has alarm on W3, the W4; The fault that this moment, A end network element detected on the work connection W2 disappears.To describe in detail when A end network element detects alarm that work connects and disappears with this scene below, M:N protection group is implemented the concrete steps that protection is switched:
Step 31: find out the work connection W2 that fault disappears, check whether the business on the W2 has been switched in the protection connection;
Switching services on the step 32:W2 is cancelled it and is switched on the protection connection P1;
Step 33: whether exist the fail operation that carries Working service to connect in the check protection group;
Step 34: find out fail operation and connect W3 and W4, the priority of the business that is connected of two work of W3 and W4 relatively, the switching services on the W3 that priority is higher is to protection connection P1.
Example 3: protection connects to go up and occurs alarming
In conjunction with Fig. 4, Fig. 6 and Fig. 7, in this example, making works in the protection group connect on the W1 switching services to protection connect on the P2 P1 free time; A end network element detected and protected connection P2 alarm upward to occur this moment.To describe in detail when A end network element detects the warning information of protecting on connecting with this scene below, M:N protection group is implemented the concrete steps that protection is switched:
Step 41: find out the protection that produces fault and connect P2, check on the P2 whether have just protected Working service;
Step 42: find out protection idle in the protection group and connect P1;
Step 43: will protect the Working service that connects on the P2 to be switched to protection and connect on the P1.
Example 4: the alarm on protection connects disappears
In conjunction with Fig. 5, Fig. 6 and Fig. 7, in this example, making works in the protection group connect on the W1 switching services to protection connect on the P2, work connects W3, W4 and protection connect and all have alarm on the P1; The alarm that this moment, A end network element detected on the protection connection P1 disappears.To describe in detail when A end network element detects the alarm disappearance of protecting on connecting with this scene below, M:N protection group is implemented the concrete steps that protection is switched:
Step 51: find out the protection connection P1 that fault disappears; The work that whether has Working service to be in fault in the check protection group connects, and the work of finding out connects W3 and W4;
Step 52: relatively working connects the priority of the Working service on W3 and the W4; Working service on the W3 that service priority is higher is switched to protection and connects on the P1.In sum; than prior art; the present invention can be in limited Internet resources the high business of ASON network medium priority is protected fully rapidly and efficiently, thereby realize SLA preferably (Service Level Agreement, SLA).
The above is the preferred embodiments of the present 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 protection scope of the present invention.
Claims (9)
1. service protecting method that is used for ASON, it is characterized in that, comprise: step S102, when the Working service that need connect the part in the middle of the connection of protection group was switched, the free time protection of searching in described protection group except described part connects connected; And
Step S104 connects if find described idle protection, then the Working service in the described part connection is switched to described idle protection and connects; Otherwise connect according to described part and to remove other protection connecting of described part in the connection of going up professional priority and described protection group and connect upward priority of Working service and switch.
2. service protecting method according to claim 1 is characterized in that, the connection in the described protection group comprises: protection connects with work and is connected.
3. service protecting method according to claim 1 and 2 is characterized in that, in described step S104, connecting in described part is that protection connects, and professional type is under the professional situation of protection on it, does not switch.
4. according to each described service protecting method in claim 1 or 2, it is characterized in that, in described step S104, further comprise:
Steps A, under the situation that does not find described idle protection connection, the priority of Working service is lower than the low priority connection that described part connects the priority that goes up Working service if deposit thereon during described other protection connects, and then the switching services that described part is connected connects to described low priority; And
Step B if the priority of the Working service that described other protection connects is higher than the priority that described part connects the business of going up, waits for that then idle protection connects.
5. service protecting method according to claim 4 is characterized in that, in described steps A, preferentially the Working service that described part is connected is switched in the shared protection connection of the minimum Working service of described low priority connection medium priority.
6. service protecting method according to claim 1 and 2 is characterized in that, before described step S102, further comprises:
Change information by every in the connection of described protection group alarm that connects the network element monitoring connection of source end.
7. service protecting method according to claim 6 is characterized in that, further comprises: after switching, if alarm disappears, then cancel described switching.
8. service protecting method according to claim 1 and 2 is characterized in that, described protection group is a M:N protection group, and the connection in the described protection group has identical source end and destination.
9. service protecting method according to claim 1 and 2 is characterized in that, it is different that the work of described protection group connects the priority that goes up Working service.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101655161A CN101159494A (en) | 2007-10-26 | 2007-10-26 | Service protecting method for automatic exchange optical network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101655161A CN101159494A (en) | 2007-10-26 | 2007-10-26 | Service protecting method for automatic exchange optical network |
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| CN101159494A true CN101159494A (en) | 2008-04-09 |
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| CNA2007101655161A Pending CN101159494A (en) | 2007-10-26 | 2007-10-26 | Service protecting method for automatic exchange optical network |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834710A (en) * | 2010-04-30 | 2010-09-15 | 中兴通讯股份有限公司 | Method and system for controlling protection switching in plane protection group of automatic switch optical network (ASON) |
| WO2010121459A1 (en) * | 2009-04-22 | 2010-10-28 | 中兴通讯股份有限公司 | Method and system for implementing protection and recovery in automatically switching optical network |
| CN102468885A (en) * | 2010-11-17 | 2012-05-23 | 中兴通讯股份有限公司 | Method and device for handling link failure |
| WO2012155789A1 (en) * | 2011-05-17 | 2012-11-22 | 中兴通讯股份有限公司 | Method and apparatus for protecting services when protection switching fails |
| CN106992873A (en) * | 2016-01-21 | 2017-07-28 | 中兴通讯股份有限公司 | Protection group treating method and apparatus |
| CN108462904A (en) * | 2017-11-22 | 2018-08-28 | 上海欣诺通信技术股份有限公司 | Hardware based protection group reverse method and optical communication equipment |
| CN109788373A (en) * | 2019-03-29 | 2019-05-21 | 烽火通信科技股份有限公司 | A kind of method and system of lossless adjustment OTN protection business |
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2007
- 2007-10-26 CN CNA2007101655161A patent/CN101159494A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010121459A1 (en) * | 2009-04-22 | 2010-10-28 | 中兴通讯股份有限公司 | Method and system for implementing protection and recovery in automatically switching optical network |
| CN101534459B (en) * | 2009-04-22 | 2011-12-28 | 中兴通讯股份有限公司 | Method and system for realizing protection and recovery in automatic switched optical network |
| CN101834710A (en) * | 2010-04-30 | 2010-09-15 | 中兴通讯股份有限公司 | Method and system for controlling protection switching in plane protection group of automatic switch optical network (ASON) |
| CN101834710B (en) * | 2010-04-30 | 2014-02-05 | 中兴通讯股份有限公司 | Method and system for controlling protection switching in plane protection group of automatic switch optical network (ASON) |
| CN102468885A (en) * | 2010-11-17 | 2012-05-23 | 中兴通讯股份有限公司 | Method and device for handling link failure |
| WO2012155789A1 (en) * | 2011-05-17 | 2012-11-22 | 中兴通讯股份有限公司 | Method and apparatus for protecting services when protection switching fails |
| CN106992873A (en) * | 2016-01-21 | 2017-07-28 | 中兴通讯股份有限公司 | Protection group treating method and apparatus |
| CN106992873B (en) * | 2016-01-21 | 2020-03-17 | 中兴通讯股份有限公司 | Protection group processing method and device |
| CN108462904A (en) * | 2017-11-22 | 2018-08-28 | 上海欣诺通信技术股份有限公司 | Hardware based protection group reverse method and optical communication equipment |
| CN109788373A (en) * | 2019-03-29 | 2019-05-21 | 烽火通信科技股份有限公司 | A kind of method and system of lossless adjustment OTN protection business |
| WO2020199420A1 (en) * | 2019-03-29 | 2020-10-08 | 烽火通信科技股份有限公司 | Method and system for non-destructive adjustment of otn protection services |
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Application publication date: 20080409 |