CN1333554C - Method for combining multi-section protection and mesh network recovery - Google Patents
Method for combining multi-section protection and mesh network recovery Download PDFInfo
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- CN1333554C CN1333554C CNB2005100692709A CN200510069270A CN1333554C CN 1333554 C CN1333554 C CN 1333554C CN B2005100692709 A CNB2005100692709 A CN B2005100692709A CN 200510069270 A CN200510069270 A CN 200510069270A CN 1333554 C CN1333554 C CN 1333554C
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Abstract
The present invention relates to service / circuit protection and a restoring method for the combination of multiplex section protection and grid mesh restoration in an automatically switched optical network, which is suitable for the combination of two multiplex section protection modes and grid mesh restoration, wherein the two multiplex section protection modes comprises linear multiplex section protection and two-fiber bidirectional multiplex-section shared protection ring protection. In the method of the present invention, service / circuit protection is generally carried out in the multiplex section protection mode at first, namely that the linear multiplex section protection or the two-fiber bidirectional multiplex-section shared protection ring protection are adopted; when the multiplex section protection can not continue, the grid mesh restoration is immediately started so as to restore service / circuit protection to guarantee the existence of service / circuit protection.
Description
Technical field
The technical field of the invention is in the ASON, and the protection of business/circuit and recovery associated methods are specifically related to business in a kind of ASON/circuit and adopt multiplex section protection and grid network (Mesh) to recover the method that combines.
Background technology
Along with the demand of service dispatching flexibility in the optical-fiber network, ASON (ASON, Automatically SwitchedOpticalNetwork) arises at the historic moment.ASON can be based on synchronous digital hierarchy (SDH, Synchronous DigitalHierarchy) or optical transfer network (OTN, Optical Transport Network) realizes, support connection forever, soft permanent connection and exchange to be connected three kinds of connected modes.
The another one advantage of ASON network is that the Mesh network recovery can be provided; and can in same network, support kinds of protect and the coexistence of Mesh network recovery; and the combination of protection and Mesh network recovery, thereby can provide the service of differentiation according to the different requirement of network client.
The protection type that the ASON network can provide is as follows: 1) two fibres/four-fiber bidirectional multiplex section is shared ring protection; 2) 1+1 linear multiplex section protection; 3) 1: N (N 〉=1) linear multiplex section protection; 4) M: N linear multiplex section protection; 5) 1+1 path protection/label switched path (LSP, Label Switched Path) protection; 6) 1: 1 path protection/label switched path (LSP, Label Switched Path) protection.Wherein two fibres/four-fiber bidirectional multiplex section is shared ring protection, 1+1 linear multiplex section protection; 1: N linear multiplex section protection and M: concrete APS agreement flow process, fault detect, alarm report and the protection of N linear multiplex section protection switched usually and finished at the transmission plane layer; or adopt control channel and control unit to finish, but professional configuration is generally to finish by the control plane signaling procedure.
Can realize in the ASON that protection and Mesh network recovery combine, thereby improve the survivability of business/circuit on the network greatly.At present; business/the circuit protection and the restoration methods of protection of 1+1 label switched path and the combination of Mesh network recovery have appearred adopting; when this method all breaks down with LSP and standby LSP as the master of the label switched path (LSP) of 1+1 backup; start grid network (Mesh) and recover, to recover business/circuit.But, the method for also not protecting (two fine and four fibres) to combine in the prior art with grid network recovery about linear multiplex section protection (1+1,1: N and M: N protects configuration) and loop multiplexing section.
As ITU-T suggestion G.808.1, G.873.1 and G.841 standard linear multiplex section protection, advise that as ITU-T G.841 two fibre two-way multi-section shared protection rings of standard are technical specification well known in the art, therefore comment no longer in detail.Under the linear multiplex section protection mode, if the simultaneous faults of active link and protection link takes place, then business can't be protected.Share under the ring protection mode at two fibre two-way multi-sections, if twice fault takes place on the looped network, then having partial service/circuit can't protect.Therefore need a kind of business/circuit protection and restoration methods that above-mentioned two kinds of multiplex section protections are combined with grid network recovery, when business/circuit can not be protected, startup Mesh network recovery.
Summary of the invention
The present invention proposes the protection and the restoration methods of the business/circuit of a kind of multiplex section protection and grid network (Mesh) recovery combination; can guarantee that in linear multiplex section protection business/circuit all breaks down under the situation about can't protect because of active link and protection link; perhaps twice fault causes under the situation that partial service that two fibre two-way multi-section shared protection rim bearings carry can't protect; start the Mesh network recovery, business/circuit that recovery and protection can't be protected.Method among the present invention is applicable to linear multiplex section protection and two kinds of multiplex section protection modes of two fibre two-way multi-section shared protection ring protections.Adopt method of the present invention; multiplex section protection and the combination of Mesh network recovery; generally business/circuit is at first by multiplex section protection; promptly adopt linear multiplex section protection or two fibre two-way multi-section shared protection ring protections; when the fault that multiplex section protection can't protect (twice or repeatedly fault) takes place when; start Mesh and recover, so that reconstruction business/circuit, the assurance business is not interrupted.
The following basic principle of explaining the inventive method earlier.In the ASON network, control plane is finished the link-local resource management by LMP Link Manager Protocol (LMP, Link Management Protocol).A major function of Link Resource Manager is the link attribute association, will protect link attributes such as attribute, coded format, bandwidth information to be associated with on the link corresponding.LMP Link Manager Protocol (LMP) is with the link attribute of link-local and link-local simultaneously; pass to Routing Protocol; Routing Protocol floods link and link attribute at the whole network; behind the final network topological convergence; the all nodes of whole network are all known the topological structure of the whole network, comprise the topological structure of multiplex section protection link and the link attribute of each link.
The advantage of multiplex section protection is that switching time is short, and business/circuit interruption time is short, after shortcoming is twice fault of generation, just might can't realize the protection to business/circuit.Though and Mesh recovers can tackle repeatedly the situation of fault in the carrier class requirement that can't reach on the switching time below the 50ms.Method of the present invention is exactly with multiplex section protection and grid network recovery combination in ASON; promptly for same business/circuit; when the multiplex section protection mode can't continue to protect this business/circuit when breaking down in the network; and then utilize the Mesh network recovery function of network, can recover to be subjected to above-mentioned fault effects and interrupted service/circuit by starting the Mesh network recovery.Therefore the inventive method combines multiplex section protection and grid network recovery, has greatly improved the survivability of network institute loaded service/circuit.
Method of the present invention adopts multiplex section protection and grid network recovery coordination mode; after twice fault of generation; control plane in the network can be according to the fault point of network topology structure, professional route and twice fault; analyze multiplex section protection and whether can continue protection this business/circuit; if multiplex section protection can continue protection and just not start the Mesh network recovery, if multiplex section can't continue protection then start the Mesh network recovery.
The method and technology principle of linear multiplex section protection of the present invention and the combination of Mesh network recovery is as follows.
Linear multiplex section protection generally is divided into three kinds of modes of 1+1,1: N and M: N, and method of the present invention can be applicable to the combination of above three kinds of protected modes and Mesh network recovery.In the ASON network; if have link to adopt 1+1,1: N and M: the N linear multiplex section protection; can will protect Attribute Association to this link by LMP Link Manager Protocol; the promptly concrete protected mode that adopts of protection attribute; then by Routing Protocol flood at the whole network (Flooding); after the full mesh topology convergence, routing algorithm can be selected route as constraints with the protection attribute of business, makes selected route obtain needed protection like this.
In linear multiplex section protection,, then this plurality of sections link is called a protection group if several sections links between some nodes adopt unified protected mode and unified implementation protection.For example in the plurality of sections link of unified employing 1+1 linear multiplex section protection, all nodes of all working link, protection link and work/protection link process all belong to same group of protection group.In order to realize the combination of linear multiplex section protection and Mesh network recovery; except protecting Attribute Association to the link that adopts such linear multiplex section protection; also need to be the unique sign of protection set of dispense the whole network; protect group id also as belonging to the link attribute of the link of protection group simultaneously, the protection group id can unique identification in the ASON network belongs to the Internet resources of a protection group.The protection group id sends Routing Protocol by LMP Link Manager Protocol (LMP) to as one of link attribute, is flooded at the whole network by Routing Protocol.After the full mesh topology convergence, the arbitrary node on the ASON network all can be known the link attribute of all links on the network, and which link belongs to same protection group, and the topological structure of linear multiplex section protection group.
When business/circuit is set up; if professional protection attribute specification is a kind of in the linear multiplex section protection; then the routing algorithm calculates route as constraints, and the route that calculates must be passed through the link of specific linear multiplex section protection, thereby satisfies the protection attribute specification of business/circuit.If through routing, the protection group id of all links of business/circuit process is same sign, just shows that also this business/circuit is that road construction is on the active link in the same protection group.If through routing; business/circuit can be realized the connection of business/circuit through the link of a plurality of protection groups; the protection group id of all links that then should business/circuit process is different and have a plurality ofly, just shows that also this business/circuit road construction is on the active link that adheres to different protection groups protections separately.
Under business/circuit is based upon situation on the same protection group active link; if active link generation single failure; then professional can being protected automatically by the linear multiplex section protection mode; promptly should switch on the protection link from the active link in this Linear multiplex section by business/circuit, make this business/circuit connect and do not interrupt.If link takes place twice or repeatedly during fault, need control plane to judge according to the topological structure that floods, link protection attribute and protection group id, divide following situation:
Twice or fault repeatedly, all on the active link of same protection group, then the Mesh network recovery does not start in the fault point;
Twice or fault repeatedly, all on the protection link of same protection group, then the Mesh network recovery does not start in the fault point;
On the active link and protection link of same protection group, then the Mesh network recovery starts immediately respectively for twice or fault repeatedly, fault point.
Be based upon at business/circuit under the situation on the active link that adheres to the protection of different protection groups separately, if take place twice or fault repeatedly, whether at first whether the protection group id by the fault point link is identical confirms to take place twice in same protection group or fault repeatedly; If in same protection group primary fault takes place, is still protected automatically by the multiplex section protection mode.If twice or repeatedly fault occur in the same protection group, then handled in the situation analysis of same protection group by road construction according to as above business/circuit.
This shows; the basic principle of the inventive method is it no matter is that business/circuit road construction is in same protection group or be based upon in a plurality of protection groups; the situation that active link and protection link all break down takes place in the employed some protection groups of every business/circuit, and then the Mesh network recovery starts.The know-why of the judgment principle of the method that above-mentioned 1+1 or 1: 1 linear multiplex section protection mode combine with grid network recovery also goes for 1: N and M: protection and restoration methods that N linear multiplex section protection mode combines with grid network recovery.
The protection of linear multiplex section protection of the present invention and grid network recovery combination and restoration methods comprise step:
In the ASON network, dispose linear multiplex section protection, and be that each protection group is specified the unique protection group id of the whole network;
For the link that has disposed linear multiplex section protection, its link attribute is a linear multiplex section protection.For the linear multiplex section protection group, distribute the sign that the whole network is unique simultaneously, this is identified at this linear multiplex section protection group in the unique identification network in the ASON network.By the LMP agreement linear multiplex section protection attribute and linear multiplex section protection group id are associated with on the corresponding linear multiplex section protection link as link attribute; LMP passes to Routing Protocol with link and link attribute information in the mode of flow engineering link (TE Link); Routing Protocol floods flow engineering link and flow engineering link attribute at the whole network, final full mesh topology convergence.
When business/circuit road construction, the protected mode of business/circuit requirement is as the constraints of routing.If business/circuit requirement adopts linear multiplex section protection and Mesh network recovery combination, then the routing algorithm is according to the Yuan Hesu of business/circuit, and network topology, and the protection attribute of link calculates the route and the road construction that meet business/circuit requirement.After road construction is finished, if the protection group id of the link of business/circuit process is identical, then represent this business/circuit by road construction on the active link that belongs to a protection group together, if business/circuit the protection group id difference of link of process, then represent this business/circuit by road construction on the active link of a plurality of protection groups;
Business/circuit by the situation of road construction in same protection group under; if link generation single failure; then business/circuit is protected automatically by the linear multiplex section protection mode, promptly should switch on the protection link from the active link in this Linear multiplex section by business/circuit.If link takes place twice or repeatedly during fault, need control plane to judge according to the topological structure that floods, link protection attribute and protection group id, divide following situation:
Twice or fault repeatedly all occur on the active link of same protection group, and then the Mesh network recovery does not start;
Twice or fault repeatedly all occur on the protection link of same protection group, and then the Mesh network recovery does not start;
Twice or fault repeatedly occur in respectively on the active link and protection link of same protection group, and then the Mesh network recovery starts immediately;
Business/circuit by road construction under the situation of a plurality of protection groups, if optical fiber link takes place twice or fault repeatedly, at first judge whether in same protection group, to have taken place twice or fault repeatedly; If in same protection group primary fault only takes place; then still protect automatically by the linear multiplex section protection mode; if in same protection group, take place twice or fault repeatedly, then handled in the situation analysis of same protection group by road construction according to aforementioned business/circuit.
Said method according to linear multiplex section protection of the present invention and grid network recovery combination is characterized in that: described linear multiplex section protection mode is 1+1 or 1: 1 mode.
Said method according to linear multiplex section protection of the present invention and grid network recovery combination is characterized in that: described linear multiplex section protection mode is 1: N or M: the N mode.
The method and technology principle of two fibre two-way multi-section shared protection rings of the present invention and the combination of Mesh network recovery is as follows.
Two fibre two-way multi-section shared protection rings are similarly a kind of of multiplex section protection mode, use more extensive at present.In the ASON network, if disposed two fibre two-way multi-section shared protection rings, then for the optical fiber link that belongs on the ring, its link protection attribute is two fibre two-way multi-section shared protection rings.For two fibre two-way multi-section shared protection rings in each ASON network, distribute a protection group id that the whole network is unique simultaneously, this is identified at this two fibre two-way multi-section shared protections ring of unique identification in the ASON network.By the LMP agreement two fibre two-way multi-section shared protection rings and protection group id are associated with on the two corresponding fibre two-way multi-section shared protection loop chain roads as link attribute; LMP passes to Routing Protocol with relevant link information in the mode of flow engineering link (TE Link); Routing Protocol floods flow engineering link and flow engineering link attribute at the whole network, final full mesh topology convergence.Arbitrary node on this moment ASON network is all known the link attribute of all links on the network, and knows that by the protection group id which link group builds up same looped network, and knows the topological structure of this guard ring.
By the unique protection group id of the whole network of each looped network in the ASON network; can be used as twice or repeatedly fault whether appear at basis for estimation in the same guard ring; as two or multilink breaking down; its protection group id is identical; illustrate that then twice fault occurs in the same looped network; if two or multilink breaking down, its protection group id difference illustrates that then twice fault occurs in the different looped networks.Whether also can be used as business/circuit is the basis for estimation of transannular road construction; protection group id as all links of business/circuit process is identical; illustrate that this business/circuit is that road construction is on same looped network; if the protection of the link of business/circuit process sign is different; illustrate that this business/circuit is that road construction is on different looped networks; and what different protection group ids are arranged, and what looped networks this business/circuit has passed through with regard to road construction.
By the unique protection group id of the whole network of each looped network in the ASON network; by Routing Protocol the whole network flood and topological convergence after; the optical fiber link that will have identical protection group id combines; control plane just can be known the ring topology of this looped network; when taking place in the network twice or repeatedly after the fault; according to the protection group id attribute of fault point optical fiber link, thus can judge twice or repeatedly fault whether occur on the same looped network.When twice or when repeatedly fault occurs on the same looped network, can also be according to the fault point, the topology of this looped network, business/circuit route can be judged which business/circuit looped network and can't protect.
Under the transannular service conditions; control plane has been known the topological structure of looped network by the protection group id, so when a plurality of ring is passed through in professional road construction, only take place under the single failure situation on each ring; then utilize the defencive function of looped network to realize protection, do not need to start the Mesh network recovery.When judging by the protection group id twice fault and control plane have taken place by network topology in same ring, ring-network topology, business/circuit route is judged when this business/circuit place guard ring can't be to business/circuit protection, is started the Mesh network recovery.
The method of two fibre two-way multi-section shared protection ring protections of the present invention and grid network recovery combination comprises step:
Configuration two fibre two-way multi-section shared protection rings in the ASON network, and decide the unique protection group id of the whole network for each fourth finger;
Disposed two fibre two-way multi-sections and shared ring protection and the link of protecting group id, by the LMP agreement two fibre two-way multi-sections have been shared ring protection and be associated with on the two fibre two-way multi-section shared protection loop chain roads as link attribute with the protection group id.LMP passes to Routing Protocol with relevant link and link attribute in the mode of flow engineering link (TE Link) simultaneously, and Routing Protocol floods flow engineering link and flow engineering link attribute at the whole network, final full mesh topology convergence.
When business/circuit road construction, the protected mode of business/circuit requirement is as the constraints of routing.If business/circuit requirement adopts two fibre two-way multi-section shared protection ring protections and Mesh network recovery combination; then the routing algorithm is according to the Yuan Hesu of business/circuit; and network topology, the protection attribute of link calculates the route and the road construction that meet business/circuit requirement.After road construction is finished, if the protection group id of the link of business/circuit process is identical, then represent this business/circuit by road construction on same looped network, if business/circuit the protection group id of link of process have a plurality ofly and different, represent that then this business/circuit is the transannular road construction;
Business/circuit by the situation of road construction in same ring under, if ring uplink generation single failure, then business/circuit is by two fibre two-way multi-section shared protection ring protections.If take place on the ring twice or fault repeatedly, when control plane judges that according to network topology, ring-network topology, business/circuit route this business/circuit place guard ring can't be to business/circuit protection, to this business/circuit start Mesh network recovery.Take place twice on ring or fault repeatedly, control plane is judged this business/when circuit place guard ring can also be protected, by looped network protection business/circuit, this business is not started the Mesh network recovery according to network topology, ring-network topology, business/circuit route.
Under the situation in service link is based upon a plurality of guard rings,, at first judge whether in same ring, to have taken place twice fault if business/circuit takes place twice or fault repeatedly; If in same guard ring primary fault takes place; still protect automatically by two fibre two-way multi-section shared protection rings; if in same ring, take place twice or fault repeatedly, then take as above business/circuit to be handled by the situation of road construction in same ring.
By the link protection method that multiplex section protection mode of the present invention combines with grid network recovery, can effectively improve survivability professional in the ASON, enlarge the application of ASON, thus and the bigger economic benefit of generation.
Description of drawings
Fig. 1 is 1+1 linear multiplex section protection mode and Mesh network recovery schematic diagram in conjunction with the embodiments;
Fig. 2 is 1: 2 linear multiplex section protection mode and Mesh network recovery schematic diagram in conjunction with the embodiments;
Fig. 3 is two fibre two-way multi-section shared protection ring protection modes and Mesh network recovery schematic diagram in conjunction with the embodiments.
Embodiment
Be elaborated below in conjunction with the specific implementation of accompanying drawing to method of the present invention.
In the ASON network, dispose the linear multiplex section protection group or disposed two fibre two-way multi-section shared protection rings; and behind unique protection group id; LMP will protect attribute and protection group id to be associated with on the link corresponding as link attribute; and send Routing Protocol in the mode of flow engineering link; Routing Protocol floods flow engineering link and flow engineering link attribute again at the whole network, final full mesh topology convergence.More than be the common step that the inventive method adopted, therefore in description, no longer be repeated in this description specific embodiment.
Figure 1 shows that a 1+1 linear multiplex section protection and Mesh network recovery in conjunction with the embodiments.Comprise 9 nodes among Fig. 1, be labeled as 1 to 9 respectively, these 9 nodes are set up into the Mesh net simultaneously.As shown in Figure 1, disposed the 1+1 linear multiplex section protection between node 5 and node 6, the dotted line that is formed by short-term among the figure is represented the two-way operation link, represents the bidirectional protective link by a dotted line that forms.In this embodiment; if between node 5 and node 6, set up a service link that needs 1+1 linear multiplex section protection mode; then should business/circuit at first be based upon on the active link between the node 5,6, and be configured to 1+1 linear multiplex section protection mode.If the fault first time of Fig. 1 institute mark takes place, i.e. active link fault, this business/circuit by APS to the protection link.If the 2nd fault as Fig. 1 institute mark takes place once more, promptly occupied protection link also breaks down, and this moment, business/circuit can't continue to obtain protection.At this moment; the ASON control plane is judged according to network topology structure, link protection attribute and protection group id; judge 1+1 linear multiplex section protection mode and can't continue to protect this business; then start the Mesh network recovery immediately, restoration path can be selected through node 6-1-2-5 or through node 6-7-8-5.
Figure 2 shows that 1: 2 linear multiplex section protection mode and Mesh network recovery in conjunction with the embodiments.Be the Mesh net that 9 nodes are set up among Fig. 2, vertex ticks still is 1 to 9.As shown in Figure 2, disposed 1: 2 linear multiplex section protection between node 5 and node 6, the dotted line that short-term forms is represented two active links, and the dotted line that point forms is represented a protection link.In this embodiment; between node 5 and node 6, set up a business/circuit that has required 1: 2 linear multiplex section protection mode if desired; then should business/circuit at first be based upon on one of active link between the node 5,6, and be configured to 1: 2 linear multiplex section protection.If as shown in Figure 2 first time takes place during fault, promptly as an active link fault of business/circuit, this business/circuit by APS to the protection link.If the 2nd fault as shown in the figure takes place once more, the fault point is at occupied protection link, and should can't protect by business/circuit this moment.At this moment; the ASON control plane is judged according to network topology structure, link protection attribute and protection group id; judge 1: 2 linear multiplex section protection mode and can't continue to protect this business/circuit; then start the Mesh network recovery immediately, restoration path may be selected to be through node 6-1-2-5 or through node 6-7-8-5.
Figure 3 shows that two fibre two-way multi-section shared protections that adopt the inventive method and Mesh network recovery in conjunction with the embodiments.Be the Mesh net that 9 nodes are set up among Fig. 3, vertex ticks is 1 to 9.As shown in Figure 3, form one two fibre two-way multi-section shared protection ring between node 5, node 6, node 7 and the node 8, this encircles a designated unique guard ring sign, and this guard ring is identified at and is flooded to whole network when link attribute floods.Set up a two-way services/circuit between node 6 and node 8, disposing this business/circuit is two fiber complex section share protect, and route is 6-5-8.When if the 1st fault as shown in Figure 3 takes place, two fibre two-way multi-sections are shared ring and are protected this business/circuit automatically.If the 2nd fault as shown in Figure 3 takes place once more, judge that this business/circuit can't continue to obtain protection this moment.At this moment; the ASON control plane is judged according to the ring sign of network topology structure, link protection attribute and link; judge two fibre two-way multi-section shared protection rings and can't continue to protect this business/circuit; then start the Mesh network recovery immediately, restoration path may be selected to be through node 6-1-2-3-4-9-8.
Claims (4)
1. one kind is used for the linear multiplex section protection of ASON and the method for grid network recovery combination, comprises step:
In ASON, dispose linear multiplex section protection, and be that each protection group is specified the unique protection group id of the whole network;
For the link that has disposed linear multiplex section protection, its link attribute is a linear multiplex section protection, simultaneously for the linear multiplex section protection group, distribute the sign that the whole network is unique, this is identified at this linear multiplex section protection group in the unique identification network in the ASON, by LMP Link Manager Protocol linear multiplex section protection attribute and linear multiplex section protection group id are associated with on the corresponding linear multiplex section protection link as link attribute, LMP Link Manager Protocol is passed to Routing Protocol with link and link attribute information in the mode of flow engineering link TE Link, Routing Protocol floods flow engineering link and flow engineering link attribute at the whole network, final full mesh topology convergence;
When business/circuit road construction, the protected mode of business/circuit requirement is as the constraints of routing, if business/circuit requirement adopts linear multiplex section protection and grid network recovery combination, then the routing algorithm is according to the Yuan Hesu of business/circuit, and network topology, the protection attribute of link, calculate the route and the road construction that meet business/circuit requirement, after road construction is finished, if the protection group id of the link of business/circuit process is identical, then represent this business/circuit by road construction on the active link that belongs to a protection group together, if business/circuit the protection group id difference of link of process, then represent this business/circuit by road construction on the active link of a plurality of protection groups;
Business/circuit by the situation of road construction in same protection group under; if active link generation single failure; then business/circuit is protected automatically by the linear multiplex section protection mode; promptly should switch on the protection link from the active link in this Linear multiplex section by business/circuit; if link takes place twice or repeatedly during fault; need control plane to judge, divide following situation according to the topological structure that floods, link protection attribute and protection group id:
Twice or fault repeatedly all occur on the active link of same protection group, and then grid network recovery does not start;
Twice or fault repeatedly all occur on the protection link of same protection group, and then grid network recovery does not start;
Twice or fault repeatedly occur in respectively on the active link and protection link of same protection group, and then grid network recovery starts immediately;
Business/circuit by road construction under the situation of a plurality of protection groups, if optical fiber link takes place twice or fault repeatedly, at first judge whether in same protection group, to have taken place twice or fault repeatedly; If in same protection group primary fault only takes place; then still protect automatically by the linear multiplex section protection mode; if in same protection group, take place twice or fault repeatedly, then handled in the situation analysis of same protection group by road construction according to aforementioned business/circuit.
2. according to the described linear multiplex section protection of claim 1 and the above-mentioned link protection method of grid network recovery combination, it is characterized in that: described linear multiplex section protection mode is 1+1 or 1: 1 mode.
3. according to the described linear multiplex section protection of claim 1 and the above-mentioned link protection method of grid network recovery combination, it is characterized in that: described linear multiplex section protection mode is 1: N or M: the N mode.
4. one kind is used for the two fibre two-way multi-section shared protection ring protections of ASON and the method for grid network recovery combination, comprises step:
Configuration two fibre two-way multi-section shared protection rings in ASON, and decide the unique protection group id of the whole network for each fourth finger;
Disposed the link of two fibre two-way multi-section shared protection ring protections and protection group id, by LMP Link Manager Protocol two fibre two-way multi-section shared protection ring protections and protection group id are associated with on the two fibre two-way multi-section shared protection loop chain roads as link attribute, LMP Link Manager Protocol is passed to Routing Protocol with relevant link and link attribute in the mode of flow engineering link TE Link simultaneously, Routing Protocol floods flow engineering link and flow engineering link attribute at the whole network, final full mesh topology convergence;
When business/circuit road construction, the protected mode of business/circuit requirement is as the constraints of routing, if business/circuit requirement adopts two fibre two-way multi-section shared protection ring protections and grid network recovery combination, then the routing algorithm is according to the Yuan Hesu of business/circuit, and network topology, the protection attribute of link, calculate the route and the road construction that meet business/circuit requirement, after road construction is finished, if the protection group id of the link of business/circuit process is identical, then represent this business/circuit by road construction on same looped network, if business/circuit the protection group id of link of process have a plurality ofly and different, represent that then this business/circuit is the transannular road construction;
Business/circuit by the situation of road construction in same ring under, if ring uplink generation single failure, then business/circuit is by two fibre two-way multi-section shared protection ring protections, if take place on the ring twice or fault repeatedly, control plane is according to network topology, ring-network topology, business/circuit route is judged when this business/circuit place guard ring can't be to business/circuit protection, to this business/circuit start grid network recovery, on ring, take place twice or fault repeatedly, control plane is according to network topology, ring-network topology, business/circuit route is judged this business/when circuit place guard ring can also be protected, by looped network protection business/circuit, this business is not started grid network recovery;
Under the situation in service link is based upon a plurality of guard rings,, at first judge whether in same ring, to have taken place twice fault if business/circuit takes place twice or fault repeatedly; If in same guard ring primary fault takes place; still protect automatically by two fibre two-way multi-section shared protection rings; if in same ring, take place twice or fault repeatedly, then take as above business/circuit to be handled by the situation of road construction in same ring.
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