CN1567805A - Channel sharing ring protection supported protection switching protocol implementing method - Google Patents
Channel sharing ring protection supported protection switching protocol implementing method Download PDFInfo
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Abstract
The invention is a method of realizing switching protection protocol for supporting channel shared ring protection, including the steps: (1) on the basis of ITU-T, introducing channel switching state, channel directly-connecting state and channel idle state; (2) making APS protective networking configuration by network manager and downloading protective group information; (3) directly determining multiplex-segment shared ring protection, etc, according to node state; for channel sharing protection, according to node state, service information and network structure, judging if the protected service is influenced and determining channel protecting state and switching protecting action, directly making double-end switching to form a new ring at the top and bottom nodes of the service, and do not adopt the adjacent nodes at two ends of the failure region to make double-end switch any more. It can effectively realize original 1+1, 1 : 1 and multiplex segment sharing ring protection and also effectively realize the protection of channel shared ring.
Description
Technical field:
The present invention relates to the realization technology of channels share ring protection among a kind of Optical Transmission Network OTN OTN (Optical Transport Network), particularly adopt the service protection technology of the optical ring network of wave division multiplexing WDM (Wave DivisionMultiplexing) technology.
Background technology:
In present optical fiber transmission network, the loop network structure has obtained using widely with its good self-healing survival ability.Along with light communication system from of upgrading and the transformation of SDH network to all-optical network; APS is APS (Automatic Protection Switching); as the important means of network self-healing system, its implementation and technology also are in the continuous development perfecting process.G.841 number suggestion " type and the characteristic of SDH network protection architecture " of the branch of the relevant telecommunication standard of the ITU-T of International Telecommunications Union aspect (InternationalTelecommunication Union Telecommunication Standardization Sector) is primarily aimed at the APS function of SDH optical-fiber network and has made concrete suggestion; only contain multiplex section about the protection of loop network in the suggestion and shared the principle of ring protection, and do not comprised the principle of the normal channels share ring protection of adopting in the current optical-fiber network.Though wavelength-division multiplex technique has obtained using more and more widely in optical-fiber network, corresponding protection turning protocol and standard are not also formulated in the world so far, and a lot of communication manufacturers all adopt and continue to use the G.841 implementation of the principle of agreement.
Protection for channels share ring optical-fiber network, if directly apply mechanically the principle that multiplex section in the agreement is G.841 shared ring protection, can not realize the channels share ring protection effectively, main cause is: the principle that multiplex section is shared the ring protection protocol processes is that the adjacent node in fault section two ends is carried out dual-ended switching to form a new loop; And protect for channels share; owing on the protection granularity, can directly correspond to business; thereby can be on business circuit node and following circuit node directly carry out dual-ended switching and form new loop, avoided equally forming an overlapping circuitous loop of growing with MSP-ring.For example shown in Figure 1, when the section between node D and the E broke down, the interior ring Working service T1 from node C to node F shown in the dotted line should be switched on the outer shroud path shown in chain-dotted line, rather than the redundant path shown in solid line.Obviously, professional circuit node up and down might not be the node with the fault section direct neighbor, thus determined the channels share ring protection need a kind of new more flexibly and the method for saving realize.
Summary of the invention:
The present invention overcomes the above-mentioned weak point of prior art to propose a kind of implementation method of supporting channels share ring protection agreement in the Optical Transmission Network OTN; can either effectively realize original 1+1 protection, protection in 1: 1, the shared ring protection of multiplex section, also can effectively realize the protection of channels share ring.
Since the present invention at the Idle state of ITU-T agreement regulation, switch on the basis of attitude, straight-through three kinds of node states of attitude; channel switching attitude, the straight-through attitude of passage and passage Idle state have been introduced; make the APS agreement after improving to continue to support multiplex section to share normally carrying out of ring protection, 1+1 protection and protection in 1: 1, can also carry out the protection of channels share ring expeditiously and switch.
Purpose of the present invention can be achieved like this:
Design, a kind of protection turning protocol implementation method of supporting the channels share ring protection of application, may further comprise the steps: the Idle state IDLE that stipulate in the ITU-T agreement (1), straight-through attitude PASS, switch on the basis of three kinds of node states of attitude SWITCH, introduce three kinds of path protection states again: channel switching attitude CSWITCH, the straight-through attitude CPASS of passage and passage Idle state CIDLE;
(2) carry out the networking configuration of APS protection group by webmaster, protection is organized the relevant information downloaded stored in the database of APS control veneer; The implication of described protection group is meant that self attributes, the address that relates to veneer and port, network topology structure information, the protected business information of a certain setting protection of an intranodal comprise the logical collection of business operation type operation, last circuit node AddNode and following circuit node DropNode;
(3) situation of sharing ring protection, 1+1 protection and protecting at 1: 1 for multiplex section, each node just can directly be determined the action that protection is switched according to node state; Situation for the channels share protection, each node needs further according to node state, protected business information and network topology structure, judge whether protected business can be subjected to the influence of fault, thereby further determine the path protection state, state value is determined the corresponding protection switching action in view of the above; Angle from whole network; the realization of channels share ring protection circuit node on business directly carries out dual-ended switching with following circuit node and forms new loop, no longer equally adopts fault section two ends adjacent node to carry out the mode of dual-ended switching with MSP-ring.
Description of drawings:
Fig. 1 is in the prior art, and two fiber complex sections between D, E node during fiber failure are shared ring protection and switched the schematic diagram that has redundant transmission;
Fig. 2 is two fine channels share ring protection transmission system schematic diagrames;
Fig. 3 is a node APS control system input/output information model;
Fig. 4 is a node APS process chart;
Fig. 5 a is the business operation schematic diagram of setting out on a journey;
Fig. 5 b is following road business operation schematic diagram;
Fig. 5 c is a road business operation schematic diagram up and down;
Fig. 5 d is the express traffic operation chart;
Fig. 6 is the path protection process chart of PASS for node state;
Fig. 7 a-7g is respectively the schematic diagram of the different protection of channels share ring situation;
Fig. 8 is the path protection process chart of SWITCH for node state.
Embodiment:
Below in conjunction with accompanying drawing, concrete technology implementation scheme of the present invention is explained in detail.All accompanying drawings are added up and are convenient to understand the content of whole technique, comprise the figure that the technology of the present invention or prior art can be described.
A kind of protection turning protocol implementation method of supporting the channels share ring protection may further comprise the steps:
(1) the Idle state IDLE that stipulates in the ITU-T agreement, straight-through attitude PASS, switch on the basis of three kinds of node states of attitude SWITCH, introduce three kinds of path protection states again: the channel switching attitude is that the straight-through attitude of CSWITCH, passage is that CPASS and passage Idle state are CIDLE;
(2) carry out the networking configuration of APS protection group by webmaster, protection is organized the relevant information downloaded stored in the database of APS control veneer; The implication of described protection group is meant that self attributes, the address that relates to veneer and port, network topology structure information, the protected business information of a certain setting protection of an intranodal comprise the logical collection of business operation type operation, last circuit node AddNode and following circuit node DropNode;
(3) situation of sharing ring protection, 1+1 protection and protecting at 1: 1 for multiplex section, each node just can directly be determined the action that protection is switched according to node state; Situation for the channels share protection, each node needs further according to node state, protected business information and network topology structure, judge whether protected business can be subjected to the influence of fault, thereby further determine the path protection state, state value is determined the corresponding protection switching action in view of the above; Angle from whole network; the realization of channels share ring protection circuit node on business directly carries out dual-ended switching with following circuit node and forms new loop, no longer equally adopts fault section two ends adjacent node to carry out the mode of dual-ended switching with MSP-ring.
When described node state is " setting out on a journey " for the business operation type that leads directly to attitude and this node; following circuit node according to this business is distal to or is not distal to the source node that shows in the current APS signaling of receiving from the outer shroud direction along interior ring direction, and the path protection state of this node is made as channel switching attitude (the right channel switch is switched) or the straight-through attitude of passage.
When described node state is " following road " for the business operation type that leads directly to attitude and this node; last circuit node according to this business is bordering on or is not bordering on the source node that shows in the current APS signaling of receiving from interior ring direction along interior ring direction, and the path protection state of this node is made as channel switching attitude (the left channel switch is switched) or the straight-through attitude of passage.
When described node state is " road up and down " for the business operation type that leads directly to attitude and this node, be divided into two step process earlier:
(1) the following circuit node according to this business is distal to or is not distal to the source node that shows in the current APS signaling of receiving from the outer shroud direction along interior ring direction, and the path protection state of this node is made as channel switching attitude (the right channel switch is switched) or the straight-through attitude of passage;
(2) the last circuit node according to this business is bordering on or is not bordering on the source node that shows in the current APS signaling of receiving from interior ring direction along interior ring direction, and the path protection state of this node is made as channel switching attitude (the left channel switch is switched) or the straight-through attitude of passage;
The conclusion of comprehensive then top two steps, if the node path protection state that exists a step to draw should be the channel switching attitude, the path protection state of this node is made as the channel switching attitude so; Otherwise the path protection state of this node is made as the straight-through attitude of passage.
When described node state is " setting out on a journey " for the business operation type of switching attitude (switching direction is the left side) and this node, following circuit node according to this business is distal to or is not distal to the source node that shows in the current APS signaling of receiving from the outer shroud direction along interior ring direction, and the path protection state of this node is made as channel switching attitude (the left channel switch is switched) or passage Idle state;
When described node state is " setting out on a journey " for the business operation type of switching attitude (switching direction is the right side) and this node; following circuit node according to this business is distal to or is not distal to present node along interior ring direction, and the path protection state of this node is made as channel switching attitude (the right channel switch is switched) or passage Idle state.
When described node state is " following road " for the business operation type of switching attitude (switching direction is the left side) and this node, be bordering on or be not bordering on (next node is counted on the ring direction in present node) present node according to the last circuit node of this business along interior ring direction, the path protection state of this node is made as channel switching attitude (the left channel switch is switched) or passage Idle state;
When described node state is " following road " for the business operation type of switching attitude (switching direction is the right side) and this node; last circuit node according to this business is bordering on or is not bordering on the source node that shows in the current APS signaling of receiving from interior ring direction along interior ring direction, and the path protection state of this node is made as channel switching attitude (the right channel switch is switched) or passage Idle state.
Described node state is the business operation type during for " leading directly to " of switching attitude and this node, and its path protection state is the passage Idle state.
When described node state was Idle state, its path protection state was the passage Idle state, no matter professional action type how, its path protection state is the passage Idle state.
In the practicality, the process of the protection reverse method that the present invention adopts is:
The APS software download that at first will support the channels share ring protection to switch is arrived in the APS control veneer of transmission system.In the design of this software; the Idle state IDLE that in the ITU-T agreement, stipulates, straight-through attitude PASS, switch on the basis of three kinds of node states of attitude SWITCH, introduce three kinds of path protection states again: channel switching attitude CSWITCH, the straight-through attitude CPASS of passage and passage Idle state CIDLE.
Secondly, carry out the networking configuration of APS protection group by webmaster.Information is organized in protection to be downloaded and stores in the database of APS control veneer as the protection configuration information.The implication of described protection group is meant that self attributes, the address that relates to veneer and port, network topology structure information, the protected business information of a certain setting protection of an intranodal comprise the logical collection of action type operation, last circuit node AddNode and following circuit node DropNode.
Then, under the normal condition in the looped network state of each node all be Idle state.When optical fiber broke down, according to the handling principle of APS agreement, the APS signaling was by replying mutually between the link point after stablizing, and node obtains new state value: adjacent two side gussets of fault section are for switching attitude, and other looped network node is straight-through attitude.
The implementation procedure of APS agreement mainly is that the answering by the APS signaling realizes, the form of APS signaling can be multiple, industry is mainly used at present comprise K byte and IP wrap dual mode, are that the K byte mode is that example is illustrated (the IP packet mode is similar) with the APS signaling mainly below.After an APS signaling answering reaches a stable state, the K byte that each node is received just no longer changes, at this moment the K byte of receiving must be to send according to the nearest fault section adjacent node of present node, (form of IP bag signaling can be more flexible than the K byte to the definition of K byte according to the ITU-T standard shown in table 1, the table 2, but should comprise the information in the K byte), the K byte comes the sign of source node to extract in the K byte to obtain, so just can obtain the position of the fault section of striding in looped network according to the K byte.For example, the section of striding 4 breaks down, and after signaling reached stable state, the source node of the interior ring direction K byte that node A receives was E, and the source node of the outer shroud direction K byte of receiving is D.
| APS request command sign indicating number (1-4 position) | Destination address ID (5-8 position) |
The definition of table 1 K1 byte structure
| Source address ID (1-4 position) | Signaling length/minor axis (6) | APS state (6-8 position) |
The definition of table 2 K2 byte structure
At last, determine that next switching operation need be divided into two and handle branch:
For the situation of multi-section shared protection, 1+1 protection and protection in 1: 1, just can directly determine the action that protection is switched according to node state;
Situation for the channels share protection; need further according to node state and looped network service configuration information (professional circuit node, loop network topology structure etc. up and down); judge whether protected business can be subjected to the influence of fault; thereby further determine the path protection state, state value is determined the corresponding protection switching action in view of the above.
The present invention is a kind of protection turning protocol implementation method of supporting the channels share ring protection; the judgement and the manner of execution of APS are set in the optical fiber ring network transmission system; comprise that node state is set to Idle state; lead directly to attitude and switch the constructive method of attitude and APS signaling; its key character is: described node state also comprises and concrete professional relevant channel switching attitude; straight-through attitude of passage and passage Idle state; on the protection granularity, directly correspond to business; circuit node and following circuit node directly carry out dual-ended switching and form new loop on business; no longer equally adopt fault section two ends adjacent node to carry out the mode of dual-ended switching with MSP-ring; avoided forming long overlapping circuitous loop, the flexible more and saving of the realization of channels share ring protection.
Fig. 2 has described the network configuration example of a simple Optical Transmission Network OTN, has the optical fiber more than two or two to connect between per two network nodes; The corresponding machine of node station.Under the situation of two optical fiber, the optical signal transmission direction is just in time opposite.For the optical-fiber network of Fig. 2 example, can support a multiplex section to share ring protection, also can support the protection configuration of a plurality of channels share types simultaneously.
Fig. 3 has described the input/output information model of APS system, and the webmaster order is meant that the protection of artificial setting switches order, is the outside Starting mode of APS process.Fault detect information is sent by APS detection veneer and is striden the segment fault alarm, is the inside Starting mode of APS process.The APS configuration information is the static information relevant with APS by the webmaster decision; mainly comprise: the attribute of protection group self, ring institute comprise the order information of node, the operation of the business relevant with present node (on/following road or lead directly to), circuit node, active channel, transannular situation etc. up and down.Input APS signaling is the APS signaling of being sent by the both sides adjacent node.Output APS signaling is meant through this node APS controller handles the APS signaling that is sent to two side gussets that draws.Switching order is by should being moved by the APS that this node is carried out that the APS controller draws.
Fig. 4 has described the basic procedure that APS of the present invention handles.At first the APS control board is arrived in the APS software download, issue APS configuration data information by webmaster earlier behind the electrifying startup, main contents are as above described in the face of the explanation of Fig. 3.When the optical fiber of a certain section of striding broke down, the APS of the downstream neighbor of this section of striding detects veneer will detect this fault, and fault message can start a new APS process after being dealt into APS control veneer; APS control veneer receives that the webmaster order that manually issues also can start a new APS process; Node receives that new APS signaling indicates and currently initiated a new APS process by other node in the ring, simultaneously as the beginning of this node APS process.After node APS process was opened, APS control veneer was handled according to agreement, generates new APS signaling, is sent to peer node by major diameter and the minor axis that encircles respectively subsequently, and the node in the whole like this ring carries out repeatedly the APS signaling and replys until settling out.Node all can be checked current node state after handling APS signaling variation each time, if changing, the state of this node will produce switching action, general processing is exactly directly to send to the execution veneer, but the present invention is in order to make the APS that new APS system can compatible processing channels share ring handle, be divided into two branch process:, directly will switch order and be sent to and carry out veneer and get final product for the situation of non-channels share ring protection; For the situation of channels share ring protection, need do further processing according to node state and the professional information of protection, determine the path protection state, then could determine switching action and send to APS to carry out veneer.So far, a complete APS process has just been finished, and system returns and begins to wait for next APS process.
Following content is just to core procedure of the present invention---and the implementation procedure of channels share ring protection switching action is described for example.
Because for the section of striding; article one, business takies a passage; so the channels share ring protection can directly correspond to professional protection in fact exactly; the main means that the effective treatment channel of the present invention is shared the APS of ring are exactly by means of protection professional information and network topology structure information, and business information comprises that mainly action type is operation, upward circuit node is AddNode, circuit node is DropNode down.For a node; the professional difference setting of protection has caused the different operating type of node; for the business operation type that makes node is unified; should with the service aisle of a certain direction benchmark; generally be as the criterion with interior ring, the distance of two relative present nodes of node that the back will be used is a benchmark with interior ring direction more also.Here said go up circuit node refer under present node road business on circuit node; Following circuit node refers to the following circuit node in the present node business of setting out on a journey.Below in conjunction with Fig. 5 a, 5b, 5c, 5d an explanation is done in the definition of protection business operation type.
Shown in Fig. 5 a, do not descend the road business at the interior ring service aisle of B node, and there is the business of setting out on a journey in this service aisle at this node, then the action type of B node is defined as " Add sets out on a journey "; Following circuit node is C, supreme circuit node.Shown in Fig. 5 b, on the interior ring service aisle business from the A node set out on a journey, road under the B node, can there be intermediate node in the centre, and the B node is in this service aisle business of not setting out on a journey, then the action type of B node is defined as " following road Drop "; Last circuit node is A, does not have circuit node down.Shown in Fig. 5 c, the existing following road business of the interior ring service aisle of B node has the business of setting out on a journey again, and then the action type of B node is defined as " road AddDrop up and down "; Last circuit node is A, and following circuit node is C.Shown in Fig. 5 d, there is not the local business of road up and down in the service aisle of Node B, has only a straight-through business, promptly node A set out on a journey, road under the node C, then the action type of B node be " leading directly to Pass "; Upper and lower circuit node is sky.Also having a kind of situation, is exactly that B node service aisle does not have business, does not switch processing owing to this situation does not influence, so just do not define.By top narration as can be seen, said here business information is not specifically at a business, but at the integrated information of the business of the service aisle of ring.
The APS signaling of ring reply stable after, the node state of each node is also just decided on the ring: the situation that breaks down, the state of the node that the fault section of striding is adjacent is SWITCH, be PASS with the state of the non-conterminous node of the fault section of striding, but node isolates when being node both sides section simultaneous faults, and this node state is IDLE; Node state when system is replied after the fault restoration is IDLE.At this moment node state, service aisle business information, the APS signaling source node information by present node, add the node sequence information of looped network; just can finally determine the path protection state of this node; come this process is done further statement below by example; wherein, node state is divided into three kinds of situations.
(1) node state is the processing procedure of PASS
As shown in Figure 6, handling process when node state is PASS has been described.
For this node business operation type is the situation of Add, in conjunction with Fig. 7 a and Fig. 7 b, with node C present node.
(11) as Fig. 7 a, business is set out on a journey road under the node F from present node C; What node C received comes
Source node from the APS of outer shroud direction signaling is node D.By being distal to node D along interior ring direction comparison node F, this means that Working service through the fault section of striding, has been subjected to fault effects, need protection, so the path protection state is set to channel switching attitude (CSWITCH); Because the fault section of striding is positioned at present node right side (along traffic direction), the right channel switch is switched.
(12) as Fig. 7 b, business is set out on a journey road under the node D from present node C; The source node from the APS signaling of outer shroud direction that node C receives is node D.By not being distal to the fault section of striding adjacent node along the following circuit node of interior ring direction ratio, this means Working service without the fault section of striding, be not subjected to fault effects, do not need protection, so the path protection state is set to the straight-through attitude (CPASS) of passage; Do not need switch to switch.
For this node business operation type is the situation of Drop, in conjunction with Fig. 7 a and Fig. 7 c, with node F present node.
(13) as Fig. 7 a, business is set out on a journey road under the present node F from node C; The source node from the APS signaling of interior ring direction that node F receives is node E.By relatively being bordering on node E along interior ring direction node C, this means that Working service through the fault section of striding, has been subjected to fault effects, need protection, so the path protection state is set to channel switching attitude (CSWITCH); Because the fault section of striding is positioned at present node left side (along traffic direction), the left channel switch is switched.
(14) as Fig. 7 c, business is set out on a journey road under the present node F from node E; The source node from the APS signaling of interior ring direction that node F receives is node E.By relatively not being bordering on the fault section of striding adjacent node along circuit node on the interior ring direction node, this means that Working service is not subjected to fault effects without the fault section of striding, do not need protection, so the path protection state is set to the straight-through attitude (CPASS) of passage; Do not need switch to switch.
For this node business operation type is the situation of AddDrop; corresponding processing procedure can be decomposed into two subprocess that the business operation type is respectively Add and Drop; after successively handling two subprocess according to top method; twice result is carried out merger, just can obtain path protection state and switch motion.
For this node business operation type is the situation of Pass and since the present invention to channels share ring share protect only business up and down circuit node switch, can directly draw the path protection state is CPASS, does not need switch to switch.
(2) node state is the processing procedure of SWITCH
As shown in Figure 8, handling process when node state is SWITCH has been described.
Handle branch and be described further for eight kinds when in conjunction with Fig. 7 a, 7b, 7c, 7d, 7e, 7f, 7g node state being SWITCH respectively below.
(21) as Fig. 7 c, the node state of the right side adjacent node E of the fault section of striding 4 should be SWITCH, and the node switches direction is the left side.The business operation type of E node is Add, owing to there not being the professional process fault section of striding to be affected, so the path protection state should be CIDLE, and no switch motion.
(22) as Fig. 7 d, the node state of the right side adjacent node E of the fault section of striding 4 should be SWITCH, and the node switches direction is the left side.The business operation type of E node is Drop, owing to this moment business will inevitably be affected through the fault section of striding, so the path protection state should be CSWITCH, because the fault section of striding is positioned at (along traffic direction) on the left of the present node, the left channel switch is switched.
(23) as Fig. 7 e; action type to node E is the situation of AddDrop; analysis in conjunction with top (21), (22); the professional influence that can not be subjected to fault of setting out on a journey of this node; and the business on road will inevitably be subjected to the influence of fault under this node; so it is identical with (22) to handle conclusion: the path protection state should be CSWITCH, because the fault section of striding is positioned at present node left side (along traffic direction), the left channel switch is switched.
(24) as Fig. 7 a, the node state of the right side adjacent node E of the fault section of striding 4 should be SWITCH, and the node switches direction is the left side.The business operation type of E node is Pass and since the present invention to channels share ring share protect only business up and down circuit node switch, so the path protection state is CIDLE, do not need channel switch to switch.Same owing to also do not pass through the protection passage of D node behind the switching services, the passage that do not need protection is straight-through.So the D node does not need channel switch to switch yet.
(25) as Fig. 7 f, the node state of the left side adjacent node D of the fault section of striding 4 should be SWITCH, and the node switches direction is the right side.The business operation type of D node is Add; because this business is road under what node no matter, all will inevitably be affected, so the path protection state should be CSWITCH through the fault section of striding; because the fault section of striding is positioned at present node right side (along traffic direction), the right channel switch is switched.
(26) as Fig. 7 b, the node state of the left side adjacent node D of the fault section of striding 4 should be SWITCH, and the node switches direction is the right side.The business operation type of D node is Drop, owing to there not being the professional process fault section of striding to be affected, so the path protection state should be CIDLE, and no switch motion.
(27) as Fig. 7 g, be the situation of AddDrop to the action type of node D, in conjunction with top (25),
(26) analysis; the following road business of this node can not be subjected to the influence of fault; and will inevitably be subjected to the influence of fault in the business that this node is set out on a journey; so it is identical with (25) to handle conclusion: the path protection state should be CSWITCH; because the fault section of striding is positioned at present node right side (along traffic direction), the right channel switch is switched.
(28) as Fig. 7 a, the node state of the left side adjacent node D of the fault section of striding 4 should be SWITCH, and the node switches direction is the right side.The business operation type of D node is Pass and since the present invention to channels share ring share protect only business up and down circuit node switch, so the path protection state is CIDLE, do not need channel switch to switch.Same owing to do not pass through the protection passage of E node behind the switching services, the E node does not need PASS yet yet.
(3) node state is the processing procedure of IDLE
For node state is the processing procedure of PASS or SWITCH, is at the protection process of network measuring after the fault.To the answer of the active channel required content as APS, network measuring disappears to fault business after the fault restoration by the protection path, and whole immediately APS system is replied by signaling, and the node state after stable will be got back to the IDLE attitude by original PASS or SWITCH.Phasing is to simply really for the path protection state that node state is got back to IDLE, and do not need to judge through special: the path protection state is CIDLE, and the passage state of opening the light is no switch status.
After having determined path protection state and channel switch switch status, the switching action of channels share protection also just can determine, the APS control board just will be switched after order sends to the execution of APS execution plate, and the APS process has just been finished.
Claims (8)
1, a kind of protection turning protocol implementation method of supporting the channels share ring protection may further comprise the steps:
(1) the Idle state IDLE that in the ITU-T agreement, stipulates, straight-through attitude PASS, switches on the basis of three kinds of node states of attitude SWITCH, introduce three kinds of path protection states again: channel switching attitude CSWITCH, the straight-through attitude CPASS of passage and passage Idle state CIDLE;
(2) carry out the networking configuration of APS protection group by webmaster, protection is organized the relevant information downloaded stored in the database of APS control veneer; The implication of described protection group is meant that self attributes, the address that relates to veneer and port, network topology structure information, the protected business information of a certain setting protection of an intranodal comprise the logical collection of business operation type operation, last circuit node AddNode and following circuit node DropNode;
(3) situation of sharing ring protection, 1+1 protection and protecting at 1: 1 for multiplex section, each node just can directly be determined the action that protection is switched according to node state; Situation for the channels share protection, each node needs further according to node state, protected business information and network topology structure, judge whether protected business can be subjected to the influence of fault, thereby further determine the path protection state, state value is determined the corresponding protection switching action in view of the above; Angle from whole network; the realization of channels share ring protection circuit node on business directly carries out dual-ended switching with following circuit node and forms new loop, no longer equally adopts fault section two ends adjacent node to carry out the mode of dual-ended switching with MSP-ring.
2, protection turning protocol implementation method according to claim 1 is characterized in that:
When described node state is " setting out on a journey " for the business operation type that leads directly to attitude and this node; following circuit node according to this business is distal to or is not distal to the source node that shows in the current APS signaling of receiving from the outer shroud direction along interior ring direction, and the path protection state of this node is made as channel switching attitude (the right channel switch is switched) or the straight-through attitude of passage.
3, protection turning protocol implementation method according to claim 1 is characterized in that:
When described node state is " following road " for the business operation type that leads directly to attitude and this node; last circuit node according to this business is bordering on or is not bordering on the source node that shows in the current APS signaling of receiving from interior ring direction along interior ring direction, and the path protection state of this node is made as channel switching attitude (the left channel switch is switched) or the straight-through attitude of passage.
4, protection turning protocol implementation method according to claim 1 is characterized in that:
When described node state is " road up and down " for the business operation type that leads directly to attitude and this node, be divided into two step process earlier:
(1) the following circuit node according to this business is distal to or is not distal to the source node that shows in the current APS signaling of receiving from the outer shroud direction along interior ring direction, and the path protection state of this node is made as channel switching attitude (the right channel switch is switched) or the straight-through attitude of passage;
(2) the last circuit node according to this business is bordering on or is not bordering on the source node that shows in the current APS signaling of receiving from interior ring direction along interior ring direction, and the path protection state of this node is made as channel switching attitude (the left channel switch is switched) or the straight-through attitude of passage;
The conclusion of comprehensive then top two steps, if the node path protection state that exists a step to draw should be the channel switching attitude, the path protection state of this node is made as the channel switching attitude so; Otherwise the path protection state of this node is made as the straight-through attitude of passage.
5, protection turning protocol implementation method according to claim 1 is characterized in that:
When described node state is " setting out on a journey " for the business operation type of switching attitude (switching direction is the left side) and this node, following circuit node according to this business is distal to or is not distal to the source node that shows in the current APS signaling of receiving from the outer shroud direction along interior ring direction, and the path protection state of this node is made as channel switching attitude (the left channel switch is switched) or passage Idle state;
When described node state is " setting out on a journey " for the business operation type of switching attitude (switching direction is the right side) and this node; following circuit node according to this business is distal to or is not distal to present node along interior ring direction, and the path protection state of this node is made as channel switching attitude (the right channel switch is switched) or passage Idle state.
6, protection turning protocol implementation method according to claim 1 is characterized in that:
When described node state is " following road " for the business operation type of switching attitude (switching direction is the left side) and this node, be bordering on or be not bordering on (next node is counted on the ring direction in present node) present node according to the last circuit node of this business along interior ring direction, the path protection state of this node is made as channel switching attitude (the left channel switch is switched) or passage Idle state;
When described node state is " following road " for the business operation type of switching attitude (switching direction is the right side) and this node; last circuit node according to this business is bordering on or is not bordering on the source node that shows in the current APS signaling of receiving from interior ring direction along interior ring direction, and the path protection state of this node is made as channel switching attitude (the right channel switch is switched) or passage Idle state.
7, protection turning protocol implementation method according to claim 1 is characterized in that:
Described node state is the business operation type during for " leading directly to " of switching attitude and this node, and its path protection state is the passage Idle state.
8, protection turning protocol implementation method according to claim 1 is characterized in that:
When described node state was Idle state, its path protection state was the passage Idle state, no matter professional action type how, its path protection state is the passage Idle state.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB031319556A CN1299459C (en) | 2003-06-17 | 2003-06-17 | Channel sharing ring protection supported protection switching protocol implementing method |
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| CNB031319556A CN1299459C (en) | 2003-06-17 | 2003-06-17 | Channel sharing ring protection supported protection switching protocol implementing method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2007006175A1 (en) * | 2005-07-11 | 2007-01-18 | Zte Corporation | Method for implementing channel shared ring protection supported easy failure prevention |
| CN1333554C (en) * | 2005-05-16 | 2007-08-22 | 烽火通信科技股份有限公司 | Method for combining multi-section protection and mesh network recovery |
| CN100375461C (en) * | 2005-09-30 | 2008-03-12 | 烽火通信科技股份有限公司 | Method for carrying out VPR protection inversion in network |
| WO2010012190A1 (en) * | 2008-07-22 | 2010-02-04 | 中兴通讯股份有限公司 | Protection protocol device for network node and method for processing protection switching thereof |
| CN101465762B (en) * | 2008-12-02 | 2011-05-04 | 华为技术有限公司 | Method, equipment and system for detecting error connection between protection set ports |
| CN101640604B (en) * | 2008-07-28 | 2011-08-31 | 中国移动通信集团吉林有限公司 | Method and device for protecting packet transport network |
| CN101774391B (en) * | 2009-12-31 | 2012-02-08 | 华南理工大学 | Topology control method for wireless sensing network of railway traffic |
| CN102638733A (en) * | 2011-02-15 | 2012-08-15 | 中兴通讯股份有限公司 | Method and system for configuration protection group |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6349092B1 (en) * | 1998-11-16 | 2002-02-19 | Cisco Systems, Inc. | BLSR node extension |
| CN1126331C (en) * | 1999-11-04 | 2003-10-29 | 深圳市中兴通讯股份有限公司 | Automatically protected switching method and device in high rate SDH loop |
| CN1149761C (en) * | 2002-03-19 | 2004-05-12 | 北京邮电大学 | Protection method based on business in optical network |
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2003
- 2003-06-17 CN CNB031319556A patent/CN1299459C/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1333554C (en) * | 2005-05-16 | 2007-08-22 | 烽火通信科技股份有限公司 | Method for combining multi-section protection and mesh network recovery |
| WO2007006175A1 (en) * | 2005-07-11 | 2007-01-18 | Zte Corporation | Method for implementing channel shared ring protection supported easy failure prevention |
| CN100375461C (en) * | 2005-09-30 | 2008-03-12 | 烽火通信科技股份有限公司 | Method for carrying out VPR protection inversion in network |
| WO2010012190A1 (en) * | 2008-07-22 | 2010-02-04 | 中兴通讯股份有限公司 | Protection protocol device for network node and method for processing protection switching thereof |
| CN101325599B (en) * | 2008-07-22 | 2012-05-23 | 中兴通讯股份有限公司 | Protection protocol apparatus for network node and method for processing protection rearrange |
| CN101640604B (en) * | 2008-07-28 | 2011-08-31 | 中国移动通信集团吉林有限公司 | Method and device for protecting packet transport network |
| CN101465762B (en) * | 2008-12-02 | 2011-05-04 | 华为技术有限公司 | Method, equipment and system for detecting error connection between protection set ports |
| CN101774391B (en) * | 2009-12-31 | 2012-02-08 | 华南理工大学 | Topology control method for wireless sensing network of railway traffic |
| CN102638733A (en) * | 2011-02-15 | 2012-08-15 | 中兴通讯股份有限公司 | Method and system for configuration protection group |
| CN102638733B (en) * | 2011-02-15 | 2017-03-15 | 中兴通讯股份有限公司 | The method and system of configuration protection group |
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| Publication number | Publication date |
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| CN1299459C (en) | 2007-02-07 |
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