CN101610166A - A kind of intermediate node, cascade protection system and cascade protection method - Google Patents
A kind of intermediate node, cascade protection system and cascade protection method Download PDFInfo
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- CN101610166A CN101610166A CNA2008100679619A CN200810067961A CN101610166A CN 101610166 A CN101610166 A CN 101610166A CN A2008100679619 A CNA2008100679619 A CN A2008100679619A CN 200810067961 A CN200810067961 A CN 200810067961A CN 101610166 A CN101610166 A CN 101610166A
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Abstract
The embodiment of the invention belongs to communication technical field, discloses a kind of intermediate node, cascade protection system and cascade protection method.This intermediate node links to each other with first node with the first protection passage by first service aisle, link to each other with described Section Point with the second protection passage by second service aisle, comprise: receiving element, export after being used to receive the secondary signal of first signal of first service aisle and the first protection passage, export after receiving second monitor message of first monitor message of the first signal correspondence and described secondary signal correspondence; Processing unit is used for judging according to first monitor message of receiving element output and second monitor message whether first signal and secondary signal be normal; If it is all normal to judge described first signal and described secondary signal, described first signal is outputed to second service aisle, described secondary signal is outputed to the second protection passage.The time of switching services when utilizing the embodiment of the invention to shorten Single Point of Faliure.
Description
Technical field
The present invention relates to field of network management, particularly a kind of intermediate node, cascade protection system and cascade protection method.
Background technology
Communications optical cable is because artificial or nature, the time regular meeting blocking-up phenomenon takes place, the Communications Market of keen competition at present requires common carrier must guarantee the unblocked of client communication, communication service requires more and more higher recovery time after to service disconnection.SNCP (Sub-network Connection Protection, SNCP) grows up under this background just.SNCP is a kind of protection mechanism of special use, is used in one or more carrier networks, protects the protection class in a part of path, can support the protection subnet of cascade, is to transmit important a kind of protection type in the network.
According to SF (Signal Failure; Signal Fail)/SD (Signal Degrade; Signal Degrade) the implementation difference of defect state supervision; SNCP can further be divided into three subclass: SNC/S (SNCPwith Sublayer Monitoring; the SNCP that uses the sublayer to monitor); SNC/N (Non-intrusivelyMonitored Sub-Network Connection Protection; the SNCP that uses non-intervention type to monitor); SNC/I (Inherently Monitored Sub-Network Connection Protection, the SNCP of use Inherent monitoring).
SNC/S detects the error code degradation in continuity in service layer's defect condition, the layer network/connective defect condition and the layer network, by using sublayer expense/OAM (Operations, Administrationand Maintenance, Operations, Administration and Maintenance) realize monitoring.The method that SNC/N monitors is to survey by expense or OAM information to end-to-end or sublayer in signal.SNCP/I only supports the detection of service layer's defect condition, utilizes the inefficacy of service layer, can derive service layer's inefficacy or deterioration alarm on the adaption function of subnet connection SNC signal that needs protection and service layer.
1+1 SNC/N protection structural arrangements among Fig. 1; can be on the path any point as the source node of protection; also can be on the path any point as the destination node of protection; wherein there are two independently subnet connections; show as work and protection transmission entity, be used for the transmission of protected normal traffic signal.Non-intervention function for monitoring monitors that the end-to-end expense of SNC/N/OAM information transmits the state of entity to determine work and protection.
Among Fig. 1, the signal that an ODUk (ODUk Optical Channel Data Unit, Optical Channel Data Unit-k) SNC/N monitors from the two B choosing receipts that are dealt into of A, is dealt into the C choosing from B pair and receives.
In research and practice process to prior art, the inventor finds that there is following problem in the node switches of prior art cascade protection system among Fig. 1: for the SNC/N of the 1st ODUk, its monitoring range is from A to B.For the SNC/N of the 2nd ODUk, its monitoring range is from A to C, so a phenomenon that fault causes repeatedly switching shown in following Fig. 2 might occur.
As Fig. 2; under the situation that a plurality of protections connect; Fig. 2 (a) is all nodes business process maps just often; service aisle among Fig. 2 (b) between first node and second node breaks down; when second node detection after fault; when switching, execution can insert AIS (Alarm Indicator Signal, alarm indication signal) respectively down to service aisle between second node and the 3rd node and protection passage.Before second node switches success, the AIS that inserts has been delivered to the 3rd node down.Because the difference of fiber lengths; the difference of each node software and hardware state; each passage of each node detects fault and might be different during the sequencing handled; before may having precedence over the protection passage, the 3rd service aisle receive AIS; the 3rd node can't failure judgement any two nodes in front between; can directly trigger and switch, business is switched to the protection passage from service aisle.Because the influence of factors such as fiber lengths, node processing mode, shown in Fig. 2 (c), switching of the 3rd node may be switched successfully before second node switches success.Then shown in Fig. 2 (d), second node switches is successful.The 3rd node detection disappears to service aisle fault and AIS afterwards, but protects passage because time-delay is long, may still be in the AIS state, then can trigger once more and switch, and shown in Fig. 2 (e), business switched back service aisle again.Thereby place's fault has caused switching operation 3 times, makes switching time longer, can not meet customer need.
Summary of the invention
In order to increase the stability of protection system, improve and switch efficient, shorten switching time, the embodiment of the invention provides a kind of intermediate node, cascade protection system and cascade protection method.
On the one hand, the embodiment of the invention provides a kind of intermediate node, links to each other with first node with the first protection passage by first service aisle, links to each other with Section Point with the second protection passage by second service aisle, and described intermediate node comprises:
Receiving element is exported after being used to receive the secondary signal of first signal of described first service aisle and the described first protection passage, exports after receiving second monitor message of first monitor message of the described first signal correspondence and described secondary signal correspondence;
Processing unit is used for judging according to described first monitor message of described receiving element output and described second monitor message whether described first signal and described secondary signal be normal;
If it is all normal to judge described first signal and described secondary signal, described first signal is outputed to described second service aisle, described secondary signal is outputed to the described second protection passage.
On the one hand; the embodiment of the invention provides a kind of cascade protection system; comprise first node, intermediate node and Section Point; described intermediate node links to each other with described first node with the first protection passage by first service aisle; link to each other with described Section Point with the second protection passage by second service aisle, described intermediate node comprises:
Receiving element is exported after being used to receive the secondary signal of first signal of first service aisle and the first protection passage, exports after receiving second monitor message of first monitor message of the described first signal correspondence and described secondary signal correspondence;
Processing unit is used for judging according to described first monitor message of described receiving element output and described second monitor message whether described first signal and described secondary signal be normal;
If it is all normal to judge described first signal and described secondary signal, described first signal is outputed to described second service aisle, described secondary signal is outputed to the described second protection passage.
On the other hand; the embodiment of the invention also provides a kind of cascade protection method; be used for the cascade protection system; described cascade protection system comprises first node, intermediate node and Section Point; described intermediate node links to each other with first node with the first protection passage by first service aisle; link to each other with Section Point with the second protection passage by second service aisle, this method comprises:
Intermediate node receives described first signal and the described first described secondary signal of protecting on the passage on described first service aisle, and receives first monitor message of the described first signal correspondence and second monitor message of described secondary signal correspondence;
Judge by described first monitor message and described second monitor message whether described first signal and the secondary signal of input be normal,
If all normal, described first signal is outputed to described second service aisle, described secondary signal is outputed to the described second protection passage.
Adopt technique scheme; because under first service aisle and all normal situation of the first protection passage; first signal of first service aisle is transferred to the service aisle of Section Point; the secondary signal of the first protection passage is transferred to the protection passage of Section Point; guarantee a node detection after fault; when switching, execution only can issue ais signal to one of the service aisle between this node and the next node and protection passage; thereby avoided service aisle and protection passage to receive ais signal and service aisle and protection passage ais signal asynchronous disappearance simultaneously and repeating of may causing switched the time of switching services when shortening Single Point of Faliure.
Description of drawings
Figure 1 shows that the 1+1 SNC/N protection structural arrangements of prior art;
The 1+1 SNC/N that Figure 2 shows that prior art protects fault of structure to cause the node switches schematic diagram of repeatedly switching;
Figure 3 shows that the structure chart of the cascade protection system of one embodiment of the invention;
Figure 4 shows that the structure chart of the cascade protection system of another embodiment of the present invention;
Fig. 5 is a kind of cascade protection method flow diagram that an alternative embodiment of the invention provides;
Embodiment
Describe in detail according to embodiments of the invention below in conjunction with accompanying drawing.
As shown in Figure 3; one embodiment of the present of invention provide the cascade protection system of the intermediate node that comprises that the embodiment of the invention provides; this cascade protection system also comprises first node and Section Point; described intermediate node links to each other with described first node with the first protection passage by first service aisle; link to each other with described Section Point with the second protection passage by second service aisle; this intermediate node comprises receiving element and processing unit, wherein:
Receiving element is exported after receiving the secondary signal of first signal of first service aisle and the first protection passage, exports after receiving second monitor message of first monitor message of the first signal correspondence and secondary signal correspondence;
Processing unit judges according to first monitor message of receiving element output and second monitor message whether first signal and secondary signal be normal; If it is all normal to judge first signal and secondary signal, first signal is outputed to described second service aisle, secondary signal is outputed to the second protection passage.
Because under first service aisle and all normal situation of the first protection passage; first signal of first service aisle is transferred to the service aisle of Section Point; the secondary signal of the first protection passage is transferred to the protection passage of Section Point; guarantee a node detection after fault; when switching, execution only can issue ais signal to one of the service aisle between this node and the next node and protection passage; thereby avoided service aisle and protection passage to receive ais signal and service aisle and protection passage ais signal asynchronous disappearance simultaneously and repeating of may causing switched, when shortening Single Point of Faliure from time of switching services.
In another embodiment of the present invention, be that processing unit is used for the foregoing description difference shown in Figure 3: judge according to first monitor message of receiving element output and second monitor message whether first signal and secondary signal be normal; If it is all normal to judge first signal and secondary signal, first signal is outputed to described second service aisle, secondary signal is outputed to the second protection passage.If it is normal and the secondary signal fault outputs to second service aisle and the second protection passage with first signal to judge first signal; If it is normal and first signal fault outputs to second service aisle and the second protection passage with secondary signal to judge secondary signal.
Because under first service aisle and all normal situation of the first protection passage; first signal of first service aisle is transferred to the service aisle of Section Point; the secondary signal of the first protection passage is transferred to the protection passage of Section Point; guaranteed at first service aisle and the first protection passage wherein during a channel failure; intermediate node also fails to judge before which bar passage breaks down in first service aisle and the first protection passage, always has a passage can receive normal signal in second service aisle and the second protection passage.Simultaneously, after intermediate node was judged the situation of the normal and first protection channel failure of first service aisle, intermediate node sent to second service aisle and second to the signal of first service aisle and protects passage; Intermediate node is judged the first service aisle fault and after the first protection passage normal situation, intermediate node sends to second service aisle and second to the signal of the first protection passage and protects passage; Guaranteed fault in first service aisle and the first protection passage; and after intermediate node is judged concrete faulty channel; signal by the intermediate node selected cell is selected; the signal that transmits on second service aisle and the second protection passage all is normal; thereby increased the stability of protection system; and under the situation of a channel failure between two nodes, shortened switching time.
Can adopt the SNC/S surveillance style of standard code between first node and intermediate node, in the connection between first node and the intermediate node, insert one and monitor the sublayer, the connection quality of signals between first node and the intermediate node is monitored.Particularly, first monitor message is the sublayer monitor message corresponding to first signal that adopts the SNC/S surveillance style to obtain by between the first node and first service aisle; Second monitor message is by the sublayer monitor message corresponding to secondary signal in the first node and the first protection interchannel employing SNC/S surveillance style acquisition.
Similarly, can adopt SNC/N to monitor between first node and intermediate node with reference to ITU-T 11.2.1.2 joint regulation G.808.1, by before processing unit each quality of signals being monitored, the method for supervision is by the Overhead of end-to-end or sublayer is surveyed realization in signal.First monitor message is the Overhead corresponding to the end-to-end or sublayer of first signal by adopting between the first node and first service aisle that the SNC/N surveillance style obtains; Second monitor message is the Overhead corresponding to the end-to-end or sublayer of secondary signal by adopting at first node and the first protection interchannel that the SNC/N surveillance style obtains.
Similarly, also can adopt the SNC/I of ITU-T 11.2.1.3 joint regulation G.808.1 to monitor that this method for monitoring method is used to protect single link to connect, and that is to say the pipeline of only having striden one section service layer between first node and intermediate node.So just can utilize the inefficacy of service layer, can derive service layer's inefficacy or deterioration alarm on the adaption function of subnet connection SNC signal that needs protection and service layer, based on this alarm, processing unit can judge whether signal is normal.First monitor message is the service layer's monitoring information corresponding to first signal that adopts the SNC/I surveillance style to obtain by between the first node and first service aisle; Second monitor message is by the service layer's monitoring information corresponding to secondary signal in the first node and the first protection interchannel employing SNC/I surveillance style acquisition.
Be the cascade protection system of another embodiment of the present invention as shown in Figure 4, middle switching node among the figure links to each other with first node with the first protection passage by first service aisle, link to each other with Section Point with the second protection passage by second service aisle, the receiving element of intermediate node comprises first subelement, second subelement, intermediate interdigitated unit; The processing unit of intermediate node comprises the 3rd subelement and the 4th subelement.Wherein:
First subelement is used to receive first signal of described first service aisle also with described first signal output;
Second subelement is used to receive the described secondary signal of the described first protection passage and with described secondary signal output;
The intermediate interdigitated unit is used to receive described first signal of described first subelement output and the described secondary signal and the output of described second subelement output;
The 3rd subelement, be used to receive described first signal and the described secondary signal of the output of described intermediate interdigitated unit, and receive described first monitor message of the described first signal correspondence and described second monitor message of described secondary signal correspondence, judge by described first monitor message and described second monitor message whether described first signal and described secondary signal be normal; When described first signal and described secondary signal all just often, described first signal is exported to described second service aisle; When the normal and described secondary signal fault of described first signal, described first signal is exported to described second service aisle; When described first signal fault and described secondary signal just often, described secondary signal is exported to described second service aisle;
The 4th subelement, be used to receive described first signal and the described secondary signal of the output of described intermediate interdigitated unit, and receive described first monitor message of the described first signal correspondence and described second monitor message of described secondary signal correspondence, judge by described first monitor message and described second monitor message whether described first signal and described secondary signal be normal; When described first signal and described secondary signal all just often, described secondary signal is exported to the described second protection passage; When the normal and described secondary signal fault of described first signal, described first signal is exported to the described second protection passage; When described first signal fault and described secondary signal just often, described secondary signal export to described second the protection passage.
In the embodiment of Fig. 4, be to receive first monitor message of the first signal correspondence and second monitor message of secondary signal correspondence respectively, judge by first monitor message and second monitor message whether first signal and secondary signal be normal by the 3rd subelement and the 4th subelement.Understand easily, also can receive first monitor message of the first signal correspondence and second monitor message of secondary signal correspondence by the 3rd subelement, judge that by first monitor message and second monitor message whether first signal and secondary signal be normal, is defeated by the 4th subelement to the result.Understand easily, also can receive first monitor message of the first signal correspondence and second monitor message of secondary signal correspondence by the 4th subelement, judge that by first monitor message and second monitor message whether first signal and secondary signal be normal, is defeated by the 3rd subelement to the result.
Embodiments of the invention also provide the intermediate node that is used for above-mentioned cascade protection system, and its 26S Proteasome Structure and Function is identical with intermediate node in the cascade protection system that provides in the embodiment of the invention.In one embodiment of the invention; a kind of intermediate node is provided; this intermediate node links to each other with first node with the first protection passage by first service aisle; link to each other with Section Point with the second protection passage by second service aisle; this intermediate node comprises receiving element and processing unit, wherein:
Receiving element is exported after receiving the secondary signal of first signal of first service aisle and the first protection passage, exports after receiving second monitor message of first monitor message of the first signal correspondence and secondary signal correspondence;
Processing unit judges according to first monitor message of receiving element output and second monitor message whether first signal and secondary signal be normal; If it is all normal to judge first signal and secondary signal, first signal is outputed to described second service aisle, secondary signal is outputed to the second protection passage.
Because under first service aisle and all normal situation of the first protection passage; first signal of first service aisle is transferred to the service aisle of Section Point; the secondary signal of the first protection passage is transferred to the protection passage of Section Point; guarantee a node detection after fault; when switching, execution only can issue ais signal to one of the service aisle between this node and the next node and protection passage; thereby avoided service aisle and protection passage to receive ais signal and service aisle and protection passage ais signal asynchronous disappearance simultaneously and repeating of may causing switched, when shortening Single Point of Faliure from time of switching services.
In another embodiment of the present invention; a kind of intermediate node is provided; this intermediate node links to each other with first node with the first protection passage by first service aisle; link to each other with Section Point with the second protection passage by second service aisle; this intermediate node comprises receiving element and processing unit, wherein:
Receiving element is exported after being used to receive the secondary signal of first signal of first service aisle and the first protection passage, exports after receiving second monitor message of first monitor message of the first signal correspondence and secondary signal correspondence;
Processing unit is used for judging according to first monitor message of receiving element output and second monitor message whether first signal and secondary signal be normal; If it is all normal to judge first signal and secondary signal, first signal is outputed to described second service aisle, secondary signal is outputed to the second protection passage.If it is normal and the secondary signal fault outputs to second service aisle and the second protection passage with first signal to judge first signal; If it is normal and first signal fault outputs to second service aisle and the second protection passage with secondary signal to judge secondary signal.
Fig. 5 is a kind of cascade protection method flow diagram that an alternative embodiment of the invention provides; be used for the cascade protection system; described cascade protection system comprises first node, Section Point and intermediate node; described intermediate node links to each other with first node with the first protection passage by first service aisle; link to each other with Section Point with the second protection passage by second service aisle, concrete steps are:
S501, intermediate node receive first signal and first secondary signal of protecting on the passage on first service aisle, and receive first monitor message of the first signal correspondence and second monitor message of secondary signal correspondence.
Wherein, first monitor message that receives of intermediate node is the expense corresponding to the end-to-end or sublayer of first signal by adopting between the first node and first service aisle that the SNC/N surveillance style obtains; Second monitor message that intermediate node receives is the expense corresponding to the end-to-end or sublayer of secondary signal by adopting at first node and the first protection interchannel that the SNC/N surveillance style obtains.
Perhaps, first monitor message of intermediate node reception is the sublayer monitor message corresponding to first signal that adopts the SNC/S surveillance style to obtain by between the first node and first service aisle; Second monitor message that intermediate node receives is by the sublayer monitor message corresponding to secondary signal in the first node and the first protection interchannel employing SNC/S surveillance style acquisition.
Perhaps, first monitor message of intermediate node reception is the service layer's monitoring information corresponding to first signal that adopts the SNC/I surveillance style to obtain by between the first node and first service aisle; Second monitor message that intermediate node receives is by the service layer's monitoring information corresponding to secondary signal in the first node and the first protection interchannel employing SNC/I surveillance style acquisition.
S502, whether normal by described first signal and the secondary signal of first monitor message and second monitor message judgement input.
If S503 is normal, described first signal is outputed to described second service aisle, described secondary signal is outputed to the described second protection passage.
Because under first service aisle and all normal situation of the first protection passage; first signal of first service aisle is transferred to the service aisle of Section Point; the secondary signal of the first protection passage is transferred to the protection passage of Section Point; guarantee a node detection after fault; when switching, execution only can issue ais signal to one of the service aisle between this node and the next node and protection passage; thereby avoided service aisle and protection passage to receive ais signal and service aisle and protection passage ais signal asynchronous disappearance simultaneously and repeating of may causing switched, when shortening Single Point of Faliure from time of switching services.
The cascade protection method that the embodiment of the invention provides can also comprise except comprising S501, S502, S503:
The secondary signal fault outputs to second service aisle and the second protection passage with first signal if S504 first signal is normal.
If S505 first signal fault and secondary signal is normal outputs to second service aisle and the second protection passage with secondary signal.
Because under first service aisle and all normal situation of the first protection passage; first signal of first service aisle is transferred to the service aisle of Section Point; the secondary signal of the first protection passage is transferred to the protection passage of Section Point; guaranteed at first service aisle and the first protection passage wherein during a channel failure; intermediate node also fails to judge before which bar passage breaks down in first service aisle and the first protection passage, always has a passage can receive normal signal in second service aisle and the second protection passage.Simultaneously, after intermediate node was judged the situation of the normal and first protection channel failure of first service aisle, intermediate node sent to second service aisle and second to the signal of first service aisle and protects passage; Intermediate node is judged the first service aisle fault and after the first protection passage normal situation, intermediate node sends to second service aisle and second to the signal of the first protection passage and protects passage; Guaranteed fault in first service aisle and the first protection passage; and after intermediate node is judged concrete faulty channel; signal by the intermediate node selected cell is selected; the signal that transmits on second service aisle and the second protection passage all is normal; thereby increased the stability of protection system; and under the situation of a channel failure between two nodes, shortened switching time.
For one of ordinary skill in the art, the thought of the embodiment of the invention is applicable to the SDH that adopts similar technique, ATM, and protections such as ETH, part can change on embodiment.In sum, this description should not be construed as limitation of the present invention.
Claims (10)
1, a kind of intermediate node links to each other with first node with the first protection passage by first service aisle, links to each other with Section Point with the second protection passage by second service aisle, it is characterized in that described intermediate node comprises:
Receiving element is exported after being used to receive the secondary signal of first signal of described first service aisle and the described first protection passage, exports after receiving second monitor message of first monitor message of the described first signal correspondence and described secondary signal correspondence;
Processing unit is used for judging according to described first monitor message of described receiving element output and described second monitor message whether described first signal and described secondary signal be normal;
If it is all normal to judge described first signal and described secondary signal, described first signal is outputed to described second service aisle, described secondary signal is outputed to the described second protection passage.
2, intermediate node as claimed in claim 1 is characterized in that, described processing unit also is used for:
If judge the normal and described secondary signal fault of described first signal, described first signal is outputed to described second service aisle and the described second protection passage;
If judge normal and described first signal fault of described secondary signal, described secondary signal is outputed to described second service aisle and the described second protection passage.
3, intermediate node as claimed in claim 2 is characterized in that, described receiving element comprises:
First subelement is used to receive described first signal of described first service aisle also with described first signal output;
Second subelement is used to receive the described secondary signal of the described first protection passage and with described secondary signal output;
The intermediate interdigitated unit is used to receive described first signal of described first subelement output and the described secondary signal and the output of described second subelement output;
Described processing unit comprises:
The 3rd subelement, be used to receive described first signal and the described secondary signal of the output of described intermediate interdigitated unit, and receive described first monitor message of the described first signal correspondence and described second monitor message of described secondary signal correspondence, judge by described first monitor message and described second monitor message whether described first signal and described secondary signal be normal; When described first signal and described secondary signal all just often, described first signal is exported to described second service aisle; When the normal and described secondary signal fault of described first signal, described first signal is exported to described second service aisle; When described first signal fault and described secondary signal just often, described secondary signal is exported to described second service aisle;
The 4th subelement, be used to receive described first signal and the described secondary signal of the output of described intermediate interdigitated unit, and receive described first monitor message of the described first signal correspondence and described second monitor message of described secondary signal correspondence, judge by described first monitor message and described second monitor message whether described first signal and described secondary signal be normal; When described first signal and described secondary signal all just often, described secondary signal is exported to the described second protection passage; When the normal and described secondary signal fault of described first signal, described first signal is exported to the described second protection passage; When described first signal fault and described secondary signal just often, described secondary signal export to described second the protection passage.
4, a kind of cascade protection system; comprise first node, intermediate node and Section Point; described intermediate node links to each other with described first node with the first protection passage by first service aisle; link to each other with described Section Point with the second protection passage by second service aisle; it is characterized in that described intermediate node comprises:
Receiving element is exported after being used to receive the secondary signal of first signal of described first service aisle and the described first protection passage, exports after receiving second monitor message of first monitor message of the described first signal correspondence and described secondary signal correspondence;
Processing unit is used for judging according to described first monitor message and described second monitor message of described receiving element output whether described first signal and the described secondary signal of described receiving element output be normal;
If it is all normal to judge described first signal and described secondary signal, described first signal is outputed to described second service aisle, described secondary signal is outputed to the described second protection passage.
5, cascade protection as claimed in claim 4 system is characterized in that the processing unit of described intermediate node also is used for:
If judge the normal and described secondary signal fault of described first signal of described receiving element output, described first signal is outputed to described second service aisle and the described second protection passage;
If judge normal and described first signal fault of described secondary signal of described receiving element output, described secondary signal is outputed to described second service aisle and the described second protection passage.
6, a kind of cascade protection method; be used for the cascade protection system; described cascade protection system comprises first node, intermediate node and Section Point; described intermediate node links to each other with first node with the first protection passage by first service aisle; link to each other with Section Point with the second protection passage by second service aisle; it is characterized in that, comprising:
Intermediate node receives described first signal and the described first described secondary signal of protecting on the passage on described first service aisle, and receives first monitor message of the described first signal correspondence and second monitor message of described secondary signal correspondence;
Judge by described first monitor message and described second monitor message whether described first signal and the secondary signal of input be normal,
If all normal, described first signal is outputed to described second service aisle, described secondary signal is outputed to the described second protection passage.
7, cascade protection method as claimed in claim 6 is characterized in that, judges that by described first monitor message and described second monitor message whether normal described first signal of input and secondary signal also comprise after:
If the normal and described secondary signal fault of described first signal outputs to described second service aisle and the described second protection passage with described first signal;
If described first signal fault and described secondary signal is normal outputs to described second service aisle and the described second protection passage with described secondary signal.
8, as claim 6 or 7 described cascade protection methods, it is characterized in that:
Described first monitor message that described intermediate node receives is the expense corresponding to the end-to-end or sublayer of described first signal by adopting between described first node and described intermediate node service aisle that the SNC/N surveillance style obtains;
Described second monitor message that described intermediate node receives be by described first node and described in the middle of protection interchannel the expense that adopts that the SNC/N surveillance style obtains corresponding to the end-to-end or sublayer of described secondary signal.
9, as claim 6 or 7 described cascade protection methods, it is characterized in that:
Described first monitor message that described intermediate node receives is the sublayer monitor message corresponding to described first signal that adopts the SNC/S surveillance style to obtain by between described first node and described middle service aisle;
Described second monitor message that described intermediate node receives is by the sublayer monitor message corresponding to described secondary signal in described first node and the acquisition of described middle protection interchannel employing SNC/S surveillance style.
10, as claim 6 or 7 described cascade protection methods, it is characterized in that:
Described first monitor message that described intermediate node receives is the service layer's monitoring information corresponding to described first signal that adopts the SNC/I surveillance style to obtain by between described first node and described middle service aisle;
Described second monitor message that described intermediate node receives is by the service layer's monitoring information corresponding to described secondary signal in described first node and the acquisition of described middle protection interchannel employing SNC/I surveillance style.
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| CN110085163A (en) * | 2019-04-25 | 2019-08-02 | 深圳市洲明科技股份有限公司 | LED shows cascade Mach-Zehnder interferometer circuit and LED display |
| WO2024001228A1 (en) * | 2022-06-30 | 2024-01-04 | 中兴通讯股份有限公司 | Network protection method and apparatus, and node, system and storage medium |
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| CN100385891C (en) * | 2005-11-17 | 2008-04-30 | 华为技术有限公司 | Method and apparatus for realizing group protection in MPLS network |
| CN101145839A (en) * | 2006-09-11 | 2008-03-19 | 华为技术有限公司 | Method and device for monitoring sub-network connection protection of k-rank optical channel data unit sub-layer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110085163A (en) * | 2019-04-25 | 2019-08-02 | 深圳市洲明科技股份有限公司 | LED shows cascade Mach-Zehnder interferometer circuit and LED display |
| WO2024001228A1 (en) * | 2022-06-30 | 2024-01-04 | 中兴通讯股份有限公司 | Network protection method and apparatus, and node, system and storage medium |
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