CN1753323A - Implementation method of protection exchanging in circular network - Google Patents
Implementation method of protection exchanging in circular network Download PDFInfo
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- CN1753323A CN1753323A CNA2004100782359A CN200410078235A CN1753323A CN 1753323 A CN1753323 A CN 1753323A CN A2004100782359 A CNA2004100782359 A CN A2004100782359A CN 200410078235 A CN200410078235 A CN 200410078235A CN 1753323 A CN1753323 A CN 1753323A
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Abstract
This invention relates to a method for realizing inversion protection in a ring network including setting up M protection channels for N working channels and M is greater than or equal to 1 and smaller than or equal to N and determining using the short or long path of a certain protection channel in the M protection channels among the nodes to protect the armed protection channels when an armed protection working channel appears among network nodes in the ring network, which can increase the efficiency for the protection of the protection channels since it can use the channels of long or short path in a same protection channel to protect different working channels in a same segment.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to the implementation method that protection is switched in a kind of looped network.
Background technology
But it is a kind of survivability technology in itself that protection is switched.But the survivability technology is to improve the technology of the reliability performance of network by the ability that the service that recovers from service disruption is provided.This technology should be applied to all places that service is provided, and certainly for communication network, provides protection to switch essential condition especially.
Protection is switched in communication network and is had a wide range of applications.For example SDH/SONET (Synchronous Digital Hierarchy /) provides 1+1,1:N, and two fine ring/four fibre loop multiplying segment protections, SNCP (SNCP) protection and DNI (dual node interconnection) protection, and the protection of OTN (optical transfer network) etc.
In communication network; the ability of the anti-inefficacy of protection passage and service aisle is identical generally speaking; therefore protecting passage also should be identical with the probability that service aisle lost efficacy; if adopt the 1:N protection; under the bigger situation of N, the probability of a protection of many service aisle contentions passage is still very big.At this moment, can not provide protection in the network for some service aisle; If certainly adopt 1+1 then can protect each service aisle all can be protected, but 1+1 protection be difficult to realize sometimes in network.Therefore, also carried out the scheme of M:N protection in some communication networks, described M:N protected mode is meant the protected mode of M bar protection service aisle protection N bar service aisle, and 1＜=M＜=N.
In US 2004/0022279 A1 patent application, provide corresponding M: the implementation method of N trail protection; in EP1014613 A2 patent application, described and carried out the 26S Proteasome Structure and Function that M:N protects the network node of switching; but all do not provide a complete M:N to protect the scheme of switching in two patent applications, and all exist corresponding deficiency.That is to say that two patent applications do not provide the implementation method of switching based on the M:N protection of APS (APS) agreement, and, do not provide each protected service aisle specifically how to select to use the corresponding protection passage.
Summary of the invention
In view of above-mentioned existing in prior technology problem; the purpose of this invention is to provide the implementation method that protection is switched in a kind of looped network; thereby make and in optical-fiber network, can effectively utilize the protection passage to realize reliable M:N protection switching operation, improve the reliability of optical-fiber network.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides the implementation method that protection is switched in a kind of looped network, comprising:
A, in looped network, be provided with two or more service aisle, and the protection passage that is less than or equal to the service aisle total quantity;
B, when occurring service aisle to be protected between the network node in the looped network; the operating position and the protocol signaling transmission of the protection passage of preserving by this locality determine to use the minor axis or the major diameter of a certain protection passage in the protection passage between the described network node that service aisle to be protected is protected.
Described steps A also comprises:
The state information of in store respectively each protection passage in each network node in looped network.
The state information of described protection passage comprises:
Each protection passage is at the channel number of the service aisle of each segment protection, the state of protection passage, and the switching request on the protected service aisle.
The state of described protection passage comprises:
K byte break-through attitude: represent that this protection passage only transmits overhead byte, does not have business transferring
The ring switching attitude: the East and West direction of representing this protection passage is used;
Idle state: represent that this protection passage had not both transmitted expense and do not had business transferring yet;
East orientation or western: represent that this protection passage east orientation or west are used to section to the span switching attitude.
The implementation method that protection is switched in the described looped network also comprises:
The state information of the protection passage of preserving according to each network node is protected the distribution of channel resource, and under the nervous situation of protection channel resource the seizing of control protection passage.
In the implementation method that protection is switched in the described looped network, the described service aisle to be protected of step B is:
Network node is switched order by state or the outside of detecting the service aisle between adjacent network node, determines the service aisle that needs protection.
Described step B also comprises:
The preferential minor axis of protection passage that utilizes is protected service aisle to be protected.
Described step B comprises:
B1, determine between the network node in the looped network service aisle to be protected to occur, whether the quantity of judging service aisle to be protected greater than the quantity of the protection passage minor axis that can be used to protect with section, if greater than, execution in step B3 then, otherwise, execution in step B2;
B2, directly service aisle bridge joint to be protected is switched in the protection passage minor axis;
B3, just determine corresponding protection passage minor axis or major diameter, and described service aisle bridge joint is switched on definite the protection passage minor axis or major diameter for it according to the priority of service aisle to be protected.
Described step B3 also comprises:
Whether B31, the major diameter of judging described protection passage can be used to protect the business on the service aisle, if, execution in step B32 then, otherwise, execution in step B33;
The major diameter of B32, the operable protection passage of use is protected described service aisle;
B33, described service aisle are seized the protection passage of already used minor axis, the current business of protecting on the lower service aisle of switching request priority ratio of the protection passage of described minor axis.
Described step B3 also comprises:
Determine priority height according to the priority of the switching request of setting at the switching request of each service aisle to be protected, and as the foundation of service aisle priority height.
Described step B also comprises:
When carrying the protection channel failure of service aisle transport service between network node, the service aisle of protecting on the protection passage for described inefficacy is determined new protection passage.
The protection implementation method of switching in the described looped network, step B is described to be determined the process of new protection passage for the protection passage of described inefficacy and comprises:
Between network node, redefine new protection passage for the service aisle of protecting on the protection passage of described inefficacy in the minor axis of adaptable protection passage and the major diameter.
Described looped network be physically looped network or looped network in logic, and the overhead byte of the message that transmits between the network node in the looped network or special-purpose message carrying turning protocol signaling, and between network node, transmit by protection passage or special-purpose control channel.
Described service aisle and protection passage respectively can for:
, an optical fiber independently, the virtual container set VcG among the multiprotocol label switching MPLS, tunnel tunnel, the light cross unit ODU rank passage among the dense wave division multipurpose DWDM/ optical transfer network OTN, the combination of perhaps wavelength, and wavelength.
The implementation method that protection is switched in the described looped network comprises:
Select the protection passage identical for service aisle to be protected and provide protection for it with its bandwidth.
As seen from the above technical solution provided by the invention; the present invention is owing to adopted the long and short footpath of protection passage passage that service aisle is protected; thereby make in the inefficacy that a plurality of service aisles take place, can satisfy protection to greatest extent at the business on the service aisle.Because the line of apsides of protection passage can be used to protect service aisle simultaneously, therefore, the service efficiency of protection passage is improved simultaneously.And, can support various outsides to switch order among the present invention.
Description of drawings
Fig. 1 is the adaptable ring network structure schematic diagram of the present invention;
Fig. 2 to Fig. 6 is the application example schematic diagram that utilizes the present invention to protect to switch.
Embodiment
Core of the present invention is to make full use of the minor axis of protection passage between network node in looped network and service aisles to be protected that two protections of major diameter direction channel path is respectively between described network node provide protection; thereby make when the protection passage in the network is less than service aisle, still can satisfy the protection of each service aisle well and switch demand.
Below in conjunction with accompanying drawing specific implementation of the present invention is described.
The specific implementation of method of the present invention mainly may further comprise the steps:
Step 1: in looped network, set up the protection passage that is used to protect service aisle, and the quantity of protection passage is less than the quantity of service aisle, supposes to be set to the M:N looped network protection, and M protects number of channels in the looped network, N is a service aisle quantity in the looped network, and 1＜=M＜=N;
The present invention is only applicable in the looped network, and the network topology structure of described looped network can be an annular physically, also can be annular in logic; The two-way service aisle of N bar is arranged between the adjacent node on the looped network; the two-way protection passage of M bar links to each other; described passage can be an independently optical fiber; also can be the VcG (virtual container set) among the MPLS; tunnel (tunnel) etc.; also can be ODU (light cross unit) the rank passage among the DWDM/OTN (wavelength division multiplexing/Optical Transmission Network OTN) or the combination of some wavelength or wavelength, so long as independently communication channel just can.Described M protection passage, the bandwidth of N service aisle can have nothing in common with each other, and still, described protection passage only can be protected the service aisle identical with its bandwidth;
As shown in Figure 1; described looped network comprises the looped network of A, B, C, D, E, six network nodes of F; looped network comprises many service aisles and many protection passages among the figure, and wherein three of the outer shroud in the looped network groups of four-headed arrow lines are expressed as service aisle, and two groups of four-headed arrow lines of interior ring represent to protect passage.
Step 2: the network node in looped network detects the service aisle of inefficacy, need protect switching operation to it; Perhaps switch command interface and receive FS (Forced Switch) by the outside, MS (Manual Switch), LP also needs the corresponding work passage is protected switching operation when switching order in outsides such as (protection lockings);
Step 3: detecting the network node that service aisle lost efficacy or receiving that the turning protocol that the network node of switching order in the outside is used in based on looped network generates the protection switching request, and in looped network, transmitting;
In the present invention, carry out the transmission of APS protocol signaling and can pass through overhead byte or special message, and use protection passage or special-purpose control channel to transmit turning protocol, promptly can utilize certain to be transmitted and extract the protection signaling by the protection passage of contention by the contention of protection channel resource; Perhaps, can also use independently control channel transmission and extraction protection signaling;
Step 4: the network node at the two ends of the service aisle of inefficacy is determined the corresponding protection passage for it after receiving described protection switching request, and protects switching operation, thus the feasible protection of passing through the mutual realization of signaling at service aisle;
Determining the protection passage for the corresponding protection switching request among the present invention is to select for use in the long and short footpath protection passage of protection passage, realize that promptly the long and short footpath protection passage of the protection passage in the looped network can be used simultaneously in the business of protection service aisle, thereby make and to have improved the reliability of Network Transmission effectively for the more work passage provides protection in the looped network;
In step 3 and step 4, determined the corresponding protection passage by the mutual of protocol signaling for service aisle to be protected between network node, and the professional bridge joint of service aisle transmission has been switched on the protection passage; But because among the present invention, the protection passage is less than the quantity of service aisle, so the possibility of protection passage may occur to provide for all working passage, for this reason, the mode that has adopted supportive protection passage priority to be provided with among the present invention, made when a plurality of service aisles of generation lost efficacy, can further optimize the use that realizes the protection passage, thereby provide perfect protection to switch;
When protecting passage and service aisle bandwidth inconsistent, also needing to select the protection passage identical with its bandwidth according to the bandwidth value of protection passage for service aisle to be protected provides protection for it among the present invention;
Simultaneously, for improving utilization rate of network resource, the protection passage among the present invention can also be used for the extra traffic of delivery network.
Protection from above-mentioned steps 1 to step 4 is switched processing procedure as can be seen, among the present invention, in the looped network arbitrarily a network node need it to have following function:
1, must have professional up and down ability, and the business on the service aisle of east orientation can by cross matrix and east orientation and west to any protection passage carry out bridge joint and switch, the west to service aisle on business also can by cross matrix and east orientation and west to any protection passage carry out bridge joint and switch, service aisle is connection all the time between the East and West direction port; Needing in the service protection process so just can to realize the bridge joint switch function realized;
2, the network node in the looped network need possess the ability that detects each service aisle or protection feeder connection failure conditions; So that network node can be known the failure conditions of passage, thereby provide corresponding protection for it
3, can transmit and extract the protection signaling to all protection passages, or use independently control channel transmission and extract the protection signaling, described control channel can arrive all-network node on the looped network; Because both may use the protection passage to transmit signaling in the present invention, and also may adopt control channel to transmit signaling;
4, the input interface of external command is provided, can receives outside protection switching request;
5, can realize protecting channel resource to consult to use, and can protect switching operation to handle based on the APS agreement.
As can be seen, core of the present invention is exactly how to determine the corresponding protection passage for service aisle to be protected, will further describe this key problem below.
On the node of looped network, at first need to be provided with the state information of the protection passage of each section in the looped network, the state information of described each protection passage comprises the channel number of each protection passage at the service aisle of each segment protection respectively, the state of protection passage, and the switching request on the protected service aisle; The state information of the protection passage that described each network node is preserved is used for the foundation as the distribution of protection channel resource, and the foundation of the protection channel occupation of conduct under the nervous situation of protection channel resource.
The state of the protection passage of all nodes all is at certain concrete protection passage; for example; the state that can be first protection passage of a node is a k byte break-through attitude; described part pass-through state is meant not punch-through service of a break-through overhead byte; promptly only transmit overhead byte; there is not business transferring; the state of second protection passage is the ring switching attitude; represent that the transmeridional second protection of this node passage is used; the state of the 3rd protection passage is an Idle state, and both not transmitted expense does not have business transferring yet.The state of the 4th protection passage is an east orientation or western to the span switching attitude, represents that this node and east orientation or west the 4th protection passage between adjacent node is used.
Secondly, in looped network, just need switch respectively and handle, specifically comprise following several situation according to different modes at the protection under the different situations:
(1) on ring, has only the inefficacy of a section generation service aisle, if the port number that lost efficacy is smaller or equal to the number m of protection passage, can protect with minor axis so with the protection passage of section, and, the state of the protection passage that is used of all these section one-port nodes all is provided with the span switching attitude, represents that this protection channel section is used; On other network nodes and the protection passage that is used between this one-port node state that is in the protection passage of other sections on the same passage ring part break-through attitude then is set, the protection passage that is in part break-through attitude can be used to span switching;
As shown in Figure 2, professional trend before the heavy line representative is switched, the trend after the dotted line representative is switched; Two service aisles of the outer ring among the figure between network node A, the B lost efficacy, and the business on two service aisles is then protected by two protection passage minor axis of the interior side ring between network node A, the B; Because the generation of two of side ring protection passages is segment protection between network node A, B; therefore with these two major diameters of protecting passages; two protection passages that are the interior side ring between network node AD, DC, CB are set to the part pass-through state, still can be used for protecting these sections because the protection that the span switching request causes.In Fig. 2; get on through a network node D and a business under network node C from network node A; its path is AD; service aisle of the outermost of the outer ring on the DC; when the outermost service aisle of DC section takes place to lose efficacy; then span switching will be taken place in this DC section, utilize the business on the outermost service aisle of inboard second protection path protection DC section of DC section.
When (2) number that the service aisle that lost efficacy takes place when section on the ring was greater than the quantity M of protection passage, the preferential protection passage of the minor axis direction between the network node corresponding with service aisle that uses of the M bar service aisle that its medium priority is high was protected; Service aisle to be protected for other then can use the major diameter passage of the protection passage in the looped network to protect, the situation of at this moment may initial ring switching the span switching of seizing other sections, in concrete processing procedure, can protect seizing of passage according to the priority of the protection switching request of each service aisle, if can not be successful, then the business on these service aisles will can not get protection; In preemption processes; the protection passage that the service aisle that protection switching request priority is low is used is seized the high service aisle of protected switching request priority; both can seize the minor axis protection passage in this section in the preemption processes, also can seize the minor axis protection passage in other sections.
M:N ring protection system for example, N bar service aisle all lost efficacy, but the degree difference that lost efficacy, therefore the priority of switching request is also different, the M bar that priority is high is protected by span switching earlier, if M bar protection passage does not all have to switch at other section, then other service aisles to be protected can be protected by the protection passage of major diameter;
As shown in Figure 3, there is the business of encircling down from C through network node A, B from network node D ring in the looped network, but the 3rd service aisle in the outside between A and the B lost efficacy, and at this moment two of the AB section protection passages have all entered the business on first and second service aisle of the outside that the span switching attitude is used to protect the AB section; Therefore, can adopt the business on the 3rd service aisle in the described outside of major diameter passage route protection of the inboard article one protection of AB section passage, be protected through bridge joint and the business of switching; As shown in Figure 3, if inboard article one protection passage AD, DC, CB section are used to protect the protection request of higher priority, and the inboard second protection passage between DC has been used to segment protection, and then this business will can not get protection.
(3) when a certain section of certain protection passage lost efficacy, if the protection passage of this section is not used as the protection service aisle, then should protect passage to be set to protect the span switching state of locking SF-P on the one-port node of this section, but can be used to the span switching of the service aisle of other sections with the protection passage that this protection passage is in other sections on the same ring; If the major diameter of this protection passage is used to protect business on certain service aisle, then the business of original service aisle will be protected the branch of passage to be equipped with according to the situation of the one-port node of the section of switching to attempt to realize protecting again on this protection passage; If span switching is taking place this protection passage, then the situation of switching of other sections of knowing according to all inefficacies of this section with by the signaling that the protection passage passes over of this protected service aisle is protected redistributing to attempt to realize protection of passage;
As shown in Figure 4, for protection situation shown in Figure 2, if inefficacy has also taken place the inboard article one protection passage at this moment between the AB section, then the business of Bao Hu outside article one service aisle will be released, and the span switching state that this protection passage is in SF-P is set; And use the major diameter of inboard article one protection passage to protect outside article one service aisle, promptly use the inboard article one protection passage between AD, DC, BC section to protect;
As shown in Figure 5; inboard article one protection channel failure on the BC section; at this moment; because the major diameter of this protection passage is used; so need be to the inboard second protection of BC section passage with the business reorganization on the inboard article one protection passage between the BC; condition is that the inboard second protection of this BC section passage is idle, perhaps has the lower switching request of priority ratio.
(4) all protection channel section lost efficacy when between two network nodes, then all M bars protect the business of the service aisle of the protection path protection that has been in the span switching state in passages will use the major diameter of corresponding protection passage to carry out ring switching, promptly seize the protection channel resource from other sections the corresponding work passage is protected;
As shown in Figure 6, the SD inefficacy has taken place in AB section outside second service aisle, article one, the SF inefficacy has taken place in service aisle, therefore, business outside inboard article one of AB section has been protected path protection on article one service aisle, the business outside inboard second has been protected path protection on the second service aisle; Afterwards; the SF inefficacy has all taken place in two protection passages on the AB section; at this moment; the outside first of its protection; article two, the business on the service aisle is released; and readjust and adopt the major diameter of inboard two the protection passages of AB section that described business is protected; promptly utilize AD; DC; two protections in inboard on the BC section path protection AB section outside first; business on two numbers service aisles; to be protected by the business on outside article one service aisle of seizing the AB section; but the business of the outside second service aisle of AB section then will can not get protection because the priority ratio of request hangs down than the protection switching request priority of DC outside article one service aisle; if priority is higher certainly; then can be protected, but the business of outside article one service aisle will can not get protection owing to priority is low between the DC section.
Among the present invention, when determining the protection passage, and when seizing the protection passage, only select to use the protection passage identical that service aisle is protected with the service aisle bandwidth for service aisle.
Among the present invention, also owing to OTN, MPLS, the SDH multiplexing section all has regulation for switching request, in order to support top all international standards, can adopt the switching request of their complete or collected works as the present invention's support.Simultaneously, for guaranteeing the reliability of the business that the network medium priority is not high, corresponding switching request has been carried out concrete regulation, it is the size that switching request has priority, as shown in table 1, priority has height from top to bottom to low, and the particular content in the table then can be adjusted as required, and following table is a concrete application example; Service aisle under the identical situation of switching request, is numbered the priority height of little request according to 1～N numbering, and the protection passage is numbered according to 1～M;
Table 1
| Local request (initiation order automatically just, state and outside the initiation are ordered) | Priority orders (having high from top to bottom) to low |
| Lockout of Protection/Signal Fail-Protection (LO/SF-P), Signal Fail protection locking | High |
| Forced Switch-Span (FS-S); force span switching Forced Switch-Ring (FS-R); force ring switching Signal Fail-Span (SF-S); section Signal Fail Signal Fail-Ring (SF-R); ring signal inefficacy Signal Degrade-Protection (SD-P), the signal protection deterioration | |
| Signal Degrade-Span (SD-S), section Signal Degrade Signal Degrade-Ring (SD-R), ring signal deterioration | |
| Manual Switch-Span (MS-S), artificial span switching Manual Switch-Ring (MS-R), artificial ring switching | |
| Wait to Restore (WTR), Wait-to-Restore | |
| Exercise-Span (EXER-S), section Exercise Switching Exercise-Ring (EXER-R), ring Exercise Switching | |
| Reverse Request-Span (RR-S), the section reverse request |
| Reverse Request-Ring (RR-R), the ring reverse request | |
| No Request (NR) does not have request | Low |
Above-mentioned regulation at switching request priority in the looped network has been arranged; just can be that service aisle to be protected distributes the corresponding protection passage according to the priority level of switching request in looped network; and under the situation of the requirement that can't satisfy all service aisles to be protected the service aisle of the higher switching request correspondence of priority protection priority level, thereby guaranteed that the higher business of network medium priority can preferentially obtain protection.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (15)
1, the implementation method that protection is switched in a kind of looped network is characterized in that, comprising:
A, in looped network, be provided with two or more service aisle, and the protection passage that is less than or equal to the service aisle total quantity;
B, when occurring service aisle to be protected between the network node in the looped network; the operating position and the protocol signaling transmission of the protection passage of preserving by this locality determine to use the minor axis or the major diameter of a certain protection passage in the protection passage between the described network node that service aisle to be protected is protected.
2, the implementation method that protection is switched in the looped network according to claim 1 is characterized in that described steps A also comprises:
The state information of in store respectively each protection passage in each network node in looped network.
3, the implementation method that protection is switched in the looped network according to claim 2 is characterized in that the state information of described protection passage comprises:
Each protection passage is at the channel number of the service aisle of each segment protection, the state of protection passage, and the switching request on the protected service aisle.
4, the implementation method that protection is switched in the looped network according to claim 3 is characterized in that the state of described protection passage comprises:
K byte break-through attitude: represent that this protection passage only transmits overhead byte, does not have business transferring
The ring switching attitude: the East and West direction of representing this protection passage is used;
Idle state: represent that this protection passage had not both transmitted expense and do not had business transferring yet;
East orientation or western: represent that this protection passage east orientation or west are used to section to the span switching attitude.
5, the implementation method of switching according to protection in claim 2, the 3 or 4 described looped networks is characterized in that this method also comprises:
The state information of the protection passage of preserving according to each network node is protected the distribution of channel resource, and under the nervous situation of protection channel resource the seizing of control protection passage.
6, the implementation method that protection is switched in the looped network according to claim 1 is characterized in that the described service aisle to be protected of step B is:
Network node is switched order by state or the outside of detecting the service aisle between adjacent network node, determines the service aisle that needs protection.
7, the implementation method that protection is switched in the looped network according to claim 1 is characterized in that described step B also comprises:
The preferential minor axis of protection passage that utilizes is protected service aisle to be protected.
8, the implementation method of switching according to protection in claim 1,2,3,4, the 6 or 7 described looped networks is characterized in that described step B comprises:
B1, determine between the network node in the looped network service aisle to be protected to occur, whether the quantity of judging service aisle to be protected greater than the quantity of the protection passage minor axis that can be used to protect with section, if greater than, execution in step B3 then, otherwise, execution in step B2;
B2, directly service aisle bridge joint to be protected is switched in the protection passage minor axis;
B3, just determine corresponding protection passage minor axis or major diameter, and described service aisle bridge joint is switched on definite the protection passage minor axis or major diameter for it according to the priority of service aisle to be protected.
9, the implementation method that protection is switched in the looped network according to claim 8 is characterized in that described step B3 also comprises:
Whether B31, the major diameter of judging described protection passage can be used to protect the business on the service aisle, if, execution in step B32 then, otherwise, execution in step B33;
The major diameter of B32, the operable protection passage of use is protected described service aisle;
B33, described service aisle are seized the protection passage of already used minor axis, the current business of protecting on the lower service aisle of switching request priority ratio of the protection passage of described minor axis.
10, the implementation method that protection is switched in the looped network according to claim 8 is characterized in that described step B3 also comprises:
Determine priority height according to the priority of the switching request of setting at the switching request of each service aisle to be protected, and as the foundation of service aisle priority height.
11, the implementation method of switching according to protection in claim 1,2,3,4, the 6 or 7 described looped networks is characterized in that described step B also comprises:
When carrying the protection channel failure of service aisle transport service between network node, the service aisle of protecting on the protection passage for described inefficacy is determined new protection passage.
12, the protection implementation method of switching in the looped network according to claim 11 is characterized in that, step B is described to be determined the process of new protection passage for the protection passage of described inefficacy and comprise:
Between network node, redefine new protection passage for the service aisle of protecting on the protection passage of described inefficacy in the minor axis of adaptable protection passage and the major diameter.
13, the implementation method that protection is switched in the looped network according to claim 1; it is characterized in that; described looped network be physically looped network or looped network in logic; and the overhead byte of the message that transmits between the network node in the looped network or special-purpose message carrying turning protocol signaling, and by protecting passage or special-purpose control channel between network node, to transmit.
14, the protection implementation method of switching in the looped network according to claim 1 is characterized in that, described service aisle and protection passage respectively can for:
, an optical fiber independently, the virtual container set VcG among the multiprotocol label switching MPLS, tunnel tunnel, the light cross unit ODU rank passage among the dense wave division multipurpose DWDM/ optical transfer network OTN, the combination of perhaps wavelength, and wavelength.
15, the implementation method that protection is switched in the looped network according to claim 1 is characterized in that this method comprises:
Select the protection passage identical for service aisle to be protected and provide protection for it with its bandwidth.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100782359A CN100438475C (en) | 2004-09-21 | 2004-09-21 | Implementation method of protection exchanging in circular network |
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| CNB2004100782359A CN100438475C (en) | 2004-09-21 | 2004-09-21 | Implementation method of protection exchanging in circular network |
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| CN1753323A true CN1753323A (en) | 2006-03-29 |
| CN100438475C CN100438475C (en) | 2008-11-26 |
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| CN100450029C (en) * | 2006-10-22 | 2009-01-07 | 华为技术有限公司 | Branch protection negater circuit |
| CN101453264A (en) * | 2007-12-04 | 2009-06-10 | 华为技术有限公司 | Self-healing protection method and apparatus for optical network |
| CN101453288B (en) * | 2007-12-06 | 2011-11-16 | 华为技术有限公司 | Loop network protection method and network appliance |
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| WO2015172493A1 (en) * | 2014-05-16 | 2015-11-19 | 中兴通讯股份有限公司 | Data processing method and apparatus and network device |
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| JPH0653980A (en) * | 1992-07-30 | 1994-02-25 | Nec Corp | Order wire signal transmission system |
| JP3976397B2 (en) * | 1998-04-28 | 2007-09-19 | 株式会社日立コミュニケーションテクノロジー | BLSR network system |
| JP3586586B2 (en) * | 1999-05-24 | 2004-11-10 | 日本電気株式会社 | Light wave ring system |
| JP2002141923A (en) * | 2000-11-01 | 2002-05-17 | Nec Corp | Signal transmission method in ring network system |
| JP4036652B2 (en) * | 2002-01-29 | 2008-01-23 | 富士通株式会社 | Ring control node |
| DE10207529B4 (en) * | 2002-02-22 | 2004-07-29 | Siemens Ag | Local network, in particular an Ethernet network with redundancy properties and a coupling device for such a network |
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