CN101453288B - Loop network protection method and network appliance - Google Patents
Loop network protection method and network appliance Download PDFInfo
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- CN101453288B CN101453288B CN 200710124933 CN200710124933A CN101453288B CN 101453288 B CN101453288 B CN 101453288B CN 200710124933 CN200710124933 CN 200710124933 CN 200710124933 A CN200710124933 A CN 200710124933A CN 101453288 B CN101453288 B CN 101453288B
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- bridge joint
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- request message
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/08—Intermediate station arrangements, e.g. for branching, for tapping-off
- H04J3/085—Intermediate station arrangements, e.g. for branching, for tapping-off for ring networks, e.g. SDH/SONET rings, self-healing rings, meashed SDH/SONET networks
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Abstract
The invention provides a ring network protection method and network equipment, which belong to the filed of optical communication. The method comprises the following steps: when a working channel of certain service is abnormal, after detecting an abnormal initiation end, sending a short path bridged request message and a long path bridged request message, and bridging service sent from the initiation end to a near-side protection channel of the service, and switching the service received by the initiation end from the working channel to the near-side protection channel of the service to receive; when a response end receives the short path bridged request message, after replying a short path bridged response message and a long path bridged response message to the initiation end and bridging the service sent from the response end to the near-side protection channel of the service to send, switching the service received by the response end from the working channel to the near-side protection channel of the service to receive. The invention also provides the corresponding network equipment. The ring network protection method and the network equipment reduce ring switching time and service interruption time.
Description
Technical field
The present invention relates to technical field of optical network communication, relate in particular to the implementation method that protection is switched in a kind of optical-fiber network.
Background technology
In optical-fiber network, it is the salvo of two kinds of business that protection is switched with business recovery.Wherein protection is switched owing to have reliably, and the advantage that switching time is short has consequence at optical-fiber network, especially in optical transmission system.In the protection of all optical network systems is switched; the multiplex section rearrangement of SDH equipment is that the most ripe a kind of protection is switched; this protected mode is the k1 that utilizes in the multiplex section, and two overhead bytes of k2 transmit APS APS protocol signaling, finish the protection of multiplex section.Wherein, the formal definition of K1 and K2 byte is as shown in table 1.
The definition of table 1SDH Multiplex Section Shared Protection Ring K byte format
| K1 is high 4 | Low 4 of K1 | K2 is high 4 | The 5th of K2 | Low 3 of K2 |
| Request type | Destination node | Source node | Length/minor axis | State is as idle, bridge joint etc. |
And at OTN (the Optical Transmit Network that uses the APS agreement; optical transfer network) in; adopt ODU (Optical Channel Data Unit; Optical Channel Data Unit-k) (the Automatic Protection Switch of the APS in; APS)/PCC (Protection Communication Channel; the protection communication port) overhead byte transmits APS APS protocol signaling; by all network element nodes in the looped network for the processing of protocol signaling; finish APS; about the concrete definition of PCC overhead byte, this paper does not give unnecessary details for literary composition at this.
In OTN guard ring and SDH multiplexing section protection rings agreement, when professional section has only service aisle when unusual (comprising SF/SD), can initiate span switching, span switching also claims near side (ns) to switch.Still be example with the OTN protection; professional 1 east orientation detects service aisle SF among Fig. 1; professional 1 will initiate section (near side (ns)) switching request; promptly switch to its near side (ns) protection passage; the request indication " professional 1SF section (near side (ns)) switching request " that sends, final service 1 discharges professional by section (near side (ns)) protection passage.
On the other hand; following failure combination all can be synthesized SF (Signal Failure, Signal Fail) ring switching request in OTN guard ring and SDH multiplexing section protection rings agreement, abbreviates SF_R (Signal Failure-Ring as; Signal Fail-ring), ring switching also claims distal edge to switch:
A) service aisle on the same sector and protection passage SF;
B) service aisle SF on the same sector and protection passage SD (Signal Degradation, Signal Degrade);
C) service aisle SD on the same sector and protection passage SF.
Therefore, in OTN guard ring and SDH multiplexing section protection rings,, then can initiate the ring switching request, promptly switch to its distal edge protection passage if inefficacy is all arranged with section service aisle and protection passage.With the OTN protection is example; professional 1 east orientation detects service aisle SF and protection passage SF among Fig. 2; professional 1 will initiate ring (distal edge) switches, the request indication " professional 1SF ring (distal edge) is switched " of transmission, and final Working service 1 discharges professional by ring (distal edge) protection passage.
In SDH multiplexing section protection rings and OTN looped network protection, in order to protect business as much as possible, improve the network self-healing ability, can as far as possible protecting with the span switching protection with span switching.For example, when having only service aisle SF, if SF span switching request, be called for short SF_S (Signal Failure-Section, Signal Fail-section) and SF ring switching request (SF R) when all existing, the request of SF span switching obtains carrying out, and a plurality of span switchings can coexist, but do not allow a plurality of ring switching coexistences, do not allow ring (distal edge) to switch and section (near side (ns)) is switched coexistence yet, have a business can carry out ring switching in the ring at most, when one professional when carrying out ring switching, can not carry out other ring (distal edge) on the ring or section (near side (ns)) is switched.
In the prior art, according to the preamble analysis, the service aisle SD of identical work section and protection passage SF when the service aisle of perhaps identical work section and protection passage while SF, carry out ring switching.
As shown in Figure 3, originating end detects service aisle and protection passage SF at east orientation, will initiate the request of SF ring switching.Detect SF from originating end and alarm protection and switch and finish, mainly contain following steps:
(1) in the T1 moment, originating end transmission minor axis does not have bridge joint SF request and major diameter does not have bridge joint SF request;
(2) constantly, responder receives when the minor axis of originating end does not have bridge joint SF request, replys to originating end that minor axis does not have bridge joint SF response message and major diameter does not have bridge joint SF response message at T2;
(3) constantly, responder receives when the major diameter of originating end does not have bridge joint SF request, replys minor axis bridge joint response message and major diameter bridge joint response message to originating end, and carries out bridge joint and switch at T3;
(4) constantly, originating end is received the major diameter bridge joint SF request of responder, sends minor axis bridge joint SF request and major diameter bridge joint SF request to responder, and carries out the bridge joint switching action, and so far dual-ended switching is finished at T4.
Wherein, it should be noted that intermediate node receive major diameter bridge joint SF request just carry out full break-through, the business that makes is able to this node of break-through.
By as can be known shown in Figure 3, originating end is finished bridge joint, is switched, business recovery in step (4).Produce the originating end bridge joint, switch in the t1 during this period of time that finishes from SF, 1 business of originating end east orientation is interrupted; And finish bridge joint, be switched to step (4) originating end is finished bridge joint, switch during this period of time in the t2 from step (3) responder, the responder west to 1 business also interrupt.
Accordingly, in the prior art, as shown in Figure 4, originating end detects service aisle SF at east orientation, will initiate SF section (near side (ns)) switching request.Detect SF from originating end and mainly contain following steps to switching to finish:
(1) at T1 constantly, originating end detects SF, and the transmission minor axis does not have bridge joint SF request message and major diameter does not have bridge joint SF request message;
(2) constantly, responder receives when the minor axis of originating end does not have bridge joint SF request message, and responder is replied minor axis bridge joint response message and major diameter bridge joint response message to originating end, and carries out bridge joint at T2;
(3) constantly, the minor axis that originating end is received responder is during bridge joint SF response message, and sending major diameter does not have bridge joint SF request message and minor axis bridge joint SF request message, and carries out bridge joint and switch at T3;
(4) constantly, the minor axis that responder is received originating end is during bridge joint SF request message, and responder is replied minor axis bridge joint response message and major diameter bridge joint response message, and carries out and switch at T4.So far, dual-ended switching is finished.
As shown in Figure 4, from T1 constantly originating end detect and finish bridge joint to step (3) unusually and switch, in the time t of east orientation business recovery, originating end east orientation business is interrupted.
The inventor finds that there is following shortcoming at least in the ring switching and the span switching of prior art in the using and analyze of prior art:
For ring switching, as shown in Figure 3, detect SF from originating end and finish to ring switching, finish repeatedly the mutual of bridge joint request message, thus cause from SF produce that ring switching finishes during this period of time in, the business of originating end east orientation is interrupted; Be switched in step (4) originating end finishes bridge joint, switches during this period of time and finish bridge joint from step (3) responder, the responder west to business also interrupt.
Equally,, as shown in Figure 4, switch, make that originating end east orientation business is in interrupt status before this always because originating end will wait the minor axis of receiving responder just to carry out bridge joint during the bridge joint request for span switching.
These shortcomings are owing in the prior art, when the originating end of ring switching and span switching will wait the response of bridge joint of receiving responder, just carry out the bridge joint of oneself and switch, and cause having prolonged switching time, cause the professional long period to interrupt.
Summary of the invention
The method and apparatus that provides a kind of looped network to switch is provided the purpose of the embodiment of the invention, in order to solving in the prior art, because the long period of the long business that causes of the switching time problem of interrupting.
Given this, the embodiment of the invention provides a kind of looped network protection switching method, and described method comprises:
When the service aisle of a certain business and near side (ns) protection passage all take place when unusual, detect described unusual originating end, send major diameter bridge joint request message and minor axis the bridge joint request message and will bridge to this professional distal edge protection passage transmission from the business that originating end sends after, the business that described originating end receives is switched to this professional distal edge protection passage reception from service aisle, wherein, described minor axis bridge joint request message and major diameter the bridge joint request message comprise the ring switching solicited message;
When responder is received described minor axis during the bridge joint request message, reply minor axis bridge joint response message and major diameter bridge joint response message and will bridge to this professional distal edge protection passage from the business that described responder sends and send to originating end;
When responder is received described major diameter during the bridge joint request message, the business that described responder is received is switched to this professional distal edge protection passage from service aisle and is received.
The another kind of looped network protection switching method that the embodiment of the invention provides comprises:
When the service aisle of a certain business and near side (ns) protection passage all take place when unusual, detect described unusual originating end, send major diameter bridge joint request message and minor axis bridge joint request message and will bridge to this professional distal edge protection passage transmission from the business that originating end sends, wherein, described minor axis bridge joint request message and major diameter the bridge joint request message comprise the ring switching solicited message;
When responder is received described minor axis during the bridge joint request message, reply minor axis bridge joint response message and major diameter bridge joint response message and will bridge to this professional distal edge protection passage from the business that described responder sends and send to originating end;
When described originating end is received described minor axis during the bridge joint response message, the business that described originating end is received is switched to this professional distal edge protection passage from service aisle and is received;
When described responder is received described major diameter during the bridge joint request message, the business that described responder is received is switched to this professional distal edge protection passage from service aisle and is received.
The another kind of looped network protection switching method that the embodiment of the invention provides comprises:
When the service aisle of a certain business and near side (ns) protection passage all take place when unusual, detect described unusual originating end, send major diameter bridge joint request message and minor axis the bridge joint request message and will bridge to this professional distal edge protection passage transmission from the business that originating end sends after, the business that described originating end receives is switched to this professional distal edge protection passage reception from service aisle, wherein, described minor axis bridge joint request message and major diameter the bridge joint request message comprise the ring switching solicited message;
When responder receives that minor axis is during the bridge joint request message; to originating end reply major diameter bridge joint response message and minor axis the bridge joint response message and will bridge to this professional distal edge protection passage from the business that described responder sends and send after, the business that described responder is received is switched to this professional distal edge protection passage from service aisle and is received.
The another kind of looped network protection switching method that the embodiment of the invention provides comprises:
When the service aisle of a certain business and near side (ns) protection passage all take place when unusual, detect described unusual originating end, send major diameter bridge joint request message and minor axis bridge joint request message and will bridge to this professional distal edge protection passage transmission from the business that originating end sends, wherein, described minor axis bridge joint request message and major diameter the bridge joint request message comprise the ring switching solicited message;
When responder receives that described minor axis is during the bridge joint request message, reply minor axis bridge joint response message and major diameter after bridge joint response message and the distal edge protection passage that will bridge to the business that described responder sends from the business that described responder sends have sent to originating end, the business that described responder is received is switched to this professional distal edge protection passage from service aisle and is received;
When described originating end is received described minor axis during the bridge joint response message, the business that described originating end is received is switched to this professional distal edge protection passage from service aisle and is received.
The another kind of looped network protection switching method that the embodiment of the invention provides comprises:
When the service aisle of a certain business takes place when unusual, detect described unusual originating end, send minor axis bridge joint request message and major diameter the bridge joint request message and will bridge to this professional near side (ns) from the business that originating end sends and protect passage after, the business that described originating end receives is switched to this professional near side (ns) protection passage reception from service aisle, wherein, described minor axis bridge joint request message and major diameter the bridge joint request message comprise the span switching solicited message;
Responder receives that described minor axis is during the bridge joint request message; to described originating end reply minor axis bridge joint response message and major diameter the bridge joint response message and will bridge to this professional near side (ns) protection passage from the business that described responder sends and send after, the business that described responder is received is switched to this professional near side (ns) protection passage from service aisle and is received.
The embodiment of the invention also provides a kind of network equipment, is used for originating end equipment, comprising:
The channel status detection module is used to detect the service aisle of a certain business and the state of protection passage;
Bridge module, be used for all taking place when unusual when described channel status detection module detects the service aisle of described business and near side (ns) protection passage, the distal edge protection passage that the business that sends is bridged to the business of described transmission sends, or take place when unusual when described channel status detection module only detects the service aisle of described business, the near side (ns) protection passage that the business that sends is bridged to the business of described transmission sends;
Message transmission module, be used for all taking place when unusual when described channel status detection module detects the service aisle of described business and near side (ns) protection passage, send major diameter bridge joint request message and minor axis bridge joint request message, wherein said minor axis bridge joint request message and major diameter the bridge joint request message comprise the ring switching request message, make the responder device responds described unusual; Perhaps
When only detecting the service aisle of described business, described channel status detection module takes place when unusual, send major diameter bridge joint request message and minor axis bridge joint request message, wherein said minor axis bridge joint request message and major diameter the bridge joint request message comprise the span switching solicited message, make the responder device responds described unusual;
The message sink module is used to receive from the major diameter of responder equipment bridge joint response message and minor axis bridge joint response message;
Switch module, be used for when distal edge protection passage that business that described bridge module will send bridges to the business of described transmission sends, the business that receives is switched to the distal edge protection passage reception of the business of described reception from service aisle, perhaps receive described minor axis during the bridge joint response message when described message sink module, when the bridge joint request message has comprised the ring switching solicited message as if described major diameter, the business that receives is switched to the distal edge protection passage reception of the business of described reception from service aisle;
When perhaps the business that will send when the described bridge module near side (ns) protection passage that bridges to the business of described transmission sends, the business that receives switched to the near side (ns) protection passage of the business of described reception from service aisle receive.
The embodiment of the invention also provides a kind of network equipment, is used for responder equipment, comprising:
Respond module, be used to receive major diameter bridge joint request message and minor axis bridge joint request message, when receiving described minor axis during the bridge joint request message, reply minor axis bridge joint response message and major diameter bridge joint response message to the transmit leg of described minor axis bridge joint request message;
Bridge module, be used for receiving that when described respond module described minor axis is during the bridge joint request message, and when described minor axis when the bridge joint request message has comprised the ring switching request message, the distal edge protection passage that the business that sends is bridged to the business of described transmission sends, perhaps receive that described minor axis is during the bridge joint request message when described respond module, and when described minor axis when the bridge joint request message has comprised the span switching request message, the near side (ns) protection passage that the business that sends is bridged to the business of described transmission sends;
Switch module, be used for receiving described major diameter bridge joint request message and described major diameter when the bridge joint request message has comprised the ring switching solicited message when described respond module, the business that receives is switched to the distal edge protection passage reception of the business of described reception from service aisle, perhaps receive described minor axis bridge joint request message and described minor axis when the bridge joint request message has comprised the ring switching solicited message when described respond module, the business that receives is switched to the distal edge protection passage of the business that receives from service aisle receive;
Perhaps receive described minor axis bridge joint request message and described minor axis when the bridge joint request message has comprised the span switching solicited message when described respond module, the business that receives is switched to the near side (ns) protection passage of the business that receives from service aisle receive.
The above embodiment of the present invention obviously reduces service outage duration by originating end and responder as far as possible early mode with bridge joint of switching, has solved in the prior art, because the long period of the long business that causes of the switching time problem of interrupting.
Description of drawings
Fig. 1 provides certain section service aisle schematic diagram that breaks down for prior art;
Fig. 2 provides same sector service aisle and the protection passage unusual schematic diagram that all breaks down for prior art;
The ring switching process schematic diagram that Fig. 3 provides for prior art;
The span switching process schematic diagram that Fig. 4 provides for prior art;
The ring switching process schematic diagram that Fig. 5 provides for the embodiment of the invention 1;
The ring switching process schematic diagram that Fig. 6 provides for the embodiment of the invention 2;
The ring switching process schematic diagram that Fig. 7 provides for the embodiment of the invention 3;
The ring switching process schematic diagram that Fig. 8 provides for the embodiment of the invention 4;
The span switching process schematic diagram that Fig. 9 provides for the embodiment of the invention 5;
A kind of network equipment schematic diagram that Figure 10 provides for the embodiment of the invention 6;
A kind of network equipment schematic diagram that Figure 11 provides for the embodiment of the invention 7.
Embodiment
In the implementation procedure of the embodiment of the invention, the inventor is by analyzing the process that the prior art protection is switched, and such as ring switching, service aisle SF lost efficacy down, make that the time of recovering two-way services is short as far as possible, should satisfy following condition:
(1) responder (service aisle do not have SF end) bridge joint as early as possible, can receive minor axis during bridge joint SF request with regard to bridge joint;
(2) originating end (detecting service aisle SF end) is switched as early as possible, can just switch when detecting SF;
(3) reduce the meaningless service outage duration of responder (service aisle does not have the SF end), responder should switched behind professional the stablizing on originating end bridge joint and the protection passage again.
Comprehensively (1), (2) and (3), in conjunction with prior art ring switching example among Fig. 3, the gap of prior art and ideal situation sees Table 2 again.
The shortcoming that the SF distal edge is switched under table 2 prior art
The inventor finds in the prior art that ring switching and span switching performance still have room for improvement, hereinafter will switch to switch with segment protection to ring protection and analyze respectively and corresponding the improvement, thereby realize the embodiment of the invention.
(1) ring switching
At ring switching, according to the preamble analysis, in the practical application, below three kinds of situations all can cause ring protection to be switched: a) on the same sector service aisle of a certain direction business and the protection passage all lost efficacy; B) the service aisle Signal Fail of a certain direction business and protection channel signal deterioration on the same sector; C) the service aisle Signal Degrade of a certain direction business and protection channel signal lost efficacy on the same sector.
At the failure conditions among Fig. 2, the embodiment of the invention 1 provides a kind of method that realizes ring switching.Because node 1 detects on a certain section, its service aisle and protection passage lost efficacy simultaneously, will initiate ring switching.
Step 101; when the service aisle of a certain business and near side (ns) protection passage all take place when unusual; detect described unusual originating end; send major diameter bridge joint request message and minor axis bridge joint request message and will bridge to this professional distal edge protection passage transmission, as major diameter bridge joint SF request message and minor axis bridge joint SF request message from the business that originating end sends.Wherein, described minor axis bridge joint request message and major diameter the bridge joint request message comprise the ring switching solicited message;
Step 102, originating end is switched the business that described originating end receives to this professional distal edge protection passage reception from service aisle;
Here, because bridge joint time of switching is very short, in the ms rank, we ignore bridge joint and needed time of switching action itself, finish and they are regarded as on a time point.As Fig. 5, at T1 constantly, node 1 (originating end) detects its service aisle and Signal Fail SF all takes place the protection passage, sends minor axis bridge joint SF request message and major diameter bridge joint SF request message to responder (node 2), and carries out bridge joint, switching action.
Step 103 when responder is received described minor axis during the bridge joint request message, is replied minor axis bridge joint response message and major diameter bridge joint response message and will bridge to this professional distal edge protection passage from the business that described responder sends and send to originating end;
As shown in Figure 5; at T2 constantly; the minor axis that responder (node 2) is received originating end (node 1) is during the bridge joint request message, and node 2 is replied minor axis bridge joint response message and major diameter bridge joint response message, and the Working service that sends is bridged to this professional distal edge protection passage sends.
Step 104, when responder is received described major diameter during the bridge joint request message, the business that described responder is received is switched to this professional distal edge protection passage from service aisle and is received.
As Fig. 5; at T3 constantly; the major diameter that responder (node 2) is received originating end (node 1) is during the bridge joint request message, and node 2 is replied minor axis bridge joint response message and major diameter bridge joint response message, and with the switching services that receives to this professional distal edge protection passage.
So far, the dual-ended switching action is finished.
And at T4 constantly, the major diameter that node 1 is received node 2 during the bridge joint response message, does not have the action of response to this message.In fact, in embodiments of the present invention, major diameter bridge joint request message (response message) can be through a plurality of intermediate nodes, and intermediate node is when receiving these message, carry out the full break-through of node, for example, when node 3 is finished break-through, the business that originating end (node 1) sends can be recovered, so business recovery time t1 obviously reduces.
At the failure conditions among Fig. 2, as shown in Figure 6, the embodiment of the invention 2 also provides a kind of method that realizes ring switching.
Step 201, when the service aisle of a certain business and near side (ns) protection passage all take place when unusual, it is the T1 moment, detect described unusual originating end, send major diameter bridge joint request message and minor axis bridge joint request message and will bridge to this professional distal edge protection passage transmission from the business that originating end sends, as major diameter bridge joint SF request message and minor axis bridge joint SF request message, wherein, described minor axis bridge joint request message and major diameter the bridge joint request message comprise the ring switching solicited message;
Step 202, when responder receives that described minor axis is during the bridge joint request message, be T2 constantly, reply minor axis bridge joint response message and major diameter bridge joint response message and will bridge to this professional distal edge protection passage from the business that described responder sends and send to originating end;
Step 203, when originating end is received described minor axis during the bridge joint response message, promptly T3 constantly, the business that described originating end is received is switched to this professional distal edge protection passage from service aisle and is received;
Step 204, when responder is received described major diameter during the bridge joint request message, promptly T4 constantly, the business that described responder is received is switched to this professional distal edge protection passage from service aisle and is received.
In fact, in embodiments of the present invention, major diameter bridge joint request message (response message) can be through a plurality of intermediate nodes, and intermediate node is when receiving these message, carry out the full break-through of node, for example, when node 3 is finished break-through, the business that originating end (node 1) sends can be recovered, so business recovery time t1 obviously reduces.
At the failure conditions among Fig. 2, as shown in Figure 7, the embodiment of the invention 3 provides a kind of method that realizes ring switching.
Step 301, when the service aisle of a certain business and near side (ns) protection passage all take place when unusual, it is the T1 moment, detect described unusual originating end, send major diameter bridge joint request message and minor axis the bridge joint request message and will bridge to this professional distal edge protection passage transmission from the business that originating end sends after, the business that described originating end receives is switched to this professional distal edge protection passage reception from service aisle, as major diameter bridge joint SF request message and minor axis bridge joint SF request message, wherein, described minor axis bridge joint request message and major diameter the bridge joint request message comprise the ring switching solicited message;
Step 302; when responder receives that minor axis is during the bridge joint request message; it is the T2 moment; to originating end reply major diameter bridge joint response message and minor axis the bridge joint response message and will bridge to this professional distal edge protection passage from the business that described responder sends and send after, the business that described responder is received is switched to this professional distal edge protection passage from service aisle and is received.
At T3 node 2 major diameter during bridge joint SF request message and T4 node 1 major diameter during the bridge joint response message of receiving node 2 constantly of receiving node 1 constantly, respectively the message of receiving there is not the action of response.Major diameter is a plurality of intermediate nodes of bridge joint request message (response message) meeting process, and intermediate node carries out the full break-through of node when receiving these message.For example, when node 3 was finished break-through, the business that originating end (node 1) sends can be recovered, so business recovery time t1 obviously reduces.
At the failure conditions among Fig. 2, as shown in Figure 8, the embodiment of the invention 4 provides a kind of method that realizes ring switching.
Step 401, when the service aisle of a certain business and near side (ns) protection passage all take place when unusual, it is the T1 moment, detect described unusual originating end, send major diameter bridge joint request message and minor axis bridge joint request message and will bridge to this professional distal edge protection passage transmission from the business that originating end sends, as major diameter bridge joint SF request message and minor axis bridge joint SF request message, wherein, described minor axis bridge joint request message and major diameter the bridge joint request message comprise the ring switching solicited message;
Step 402, when responder receives that described minor axis is during the bridge joint request message, it is the T2 moment, to originating end reply minor axis bridge joint response message and major diameter the bridge joint response message and will bridge to this professional distal edge protection passage from the business that described responder sends and send after, the business that described responder is received is switched to this professional distal edge protection passage from service aisle and is received;
Step 403, when described originating end is received described minor axis during the bridge joint response message, promptly T3 constantly, the business that described originating end is received is switched to this professional distal edge protection passage from service aisle and is received.
At T4 node 1 major diameter during the bridge joint response message of receiving node 2 constantly, the message of receiving there is not the action of response.Major diameter is a plurality of intermediate nodes of bridge joint request message (response message) meeting process, and intermediate node carries out the full break-through of node when receiving these message, for example, when node 3 was finished break-through, the business that originating end (node 1) sends can be recovered, so business recovery time t1 obviously reduces.
Among each above embodiment; practical application since originating end detect unusual after; early started the switching action of ring (distal edge) bridge joint; but some the time; scenes such as APS agreement APS signaling communication abnormality is arranged on unusual, the ring on other high priority requests, the ring have for example also been produced in the reversed process on the corresponding protection passage; may not produce mistake through abundant negotiation and switch, mistake is switched adverse consequencess such as can causing professional wrong company.
Switch for fear of mistake, each embodiment of the present invention can also start one at originating end and switch timer when originating end carry out the bridge joint action.This timing range of switching timer is 50ms to 200ms; when carrying out bridge joint, originating end picks up counting; if the time period when finishing to timing; originating end is not received major diameter during the bridge joint response message, then discharges business that business that originating end sends receives at the bridge joint and the originating end of this professional distal edge protection passage from service aisle switching to this professional distal edge protection passage.。
Based on same problem; the embodiment of the invention can also be when responder carries out the bridge joint action; switch timer in the responder setting; this timing range of switching timer is 50ms to 200ms; when carrying out bridge joint, responder picks up counting; if the time period when finishing to timing, responder is not received major diameter bridge joint request message, then discharges the bridge joint of the business of responder transmission at this professional distal edge protection passage.
(2) span switching
At span switching, this paper embodiment 5 provides a kind of method that realizes span switching.
In the practical application, when a certain section service aisle generation Signal Fail or Signal Degrade, will switch by the generating region segment protect.At the failure conditions among Fig. 1, because node 1 detects on a certain section, its service aisle produces Signal Fail, will initiate segment protection and switch.Node 1 is as originating end, to the other end (this moment, a unusual end did not take place service aisle) the sending area segment protect switching request of this section.As shown in Figure 9, its reversed process is as follows:
Step 501, when the service aisle of a certain business takes place when unusual, it is the T1 moment, detect described unusual originating end, send minor axis bridge joint request message and major diameter the bridge joint request message and will bridge to this professional near side (ns) protection passage transmission from the business that originating end sends after, the business that described originating end receives is switched to this professional near side (ns) protection passage reception from service aisle, as major diameter bridge joint SF request message and minor axis bridge joint SF request message, wherein, described minor axis bridge joint request message and major diameter the bridge joint request message comprise the span switching solicited message;
As shown in Figure 9, at T1 constantly, node 1 (originating end) detects its jointing service aisle Signal Fail SF, sends minor axis bridge joint SF request message and major diameter bridge joint SF request message to node 2, and carries out bridge joint, switching action.
Step 502; responder receives that described minor axis is during the bridge joint request message; it is the T2 moment; to described originating end reply minor axis bridge joint response message and major diameter the bridge joint response message and will bridge to this professional near side (ns) protection passage from the business that described responder sends and send after, the business that described responder is received is switched to this professional near side (ns) protection passage from service aisle and is received.
As Fig. 9, at T2 constantly, the minor axis that node 2 (responder) is received node 1 (originating end) is during bridge joint SF request message, and node 2 sends minor axis bridge joint response message and major diameter bridge joint response message to node 1, and carries out bridge joint, switching action.So far, dual-ended switching is finished, and as can be seen from the figure, detects fault (T1 constantly) in the time t of business recovery (T2 constantly) from originating end, and business is to interrupt, but there has been very big improvement this time.
At T3 constantly, the minor axis that node 1 is received node 2 during the bridge joint response message, does not have the action of response to this message.
But some the time; scenes such as APS agreement APS signaling communication abnormality is arranged on unusual, the ring on other high priority requests, the ring have for example also been produced in the reversed process on the corresponding protection passage; may not produce mistake through abundant negotiation and switch, mistake is switched adverse consequencess such as can causing professional wrong company.
Switch for fear of mistake, each embodiment of the present invention can also start one at originating end and switch timer when originating end carry out the bridge joint action.This timing range of switching timer is 50ms to 200ms; when carrying out bridge joint, originating end picks up counting; if the time period when finishing to timing; originating end is not received described minor axis during the bridge joint response message, then discharges business that business that originating end sends receives at the bridge joint and the originating end of this professional near side (ns) protection passage from service aisle switching to this professional near side (ns) protection passage.
Based on same problem; the embodiment of the invention can also be when responder carries out the bridge joint action; switch timer in the responder setting; this timing range of switching timer is 50ms to 200ms; when carrying out bridge joint, responder picks up counting; if the time period when finishing to timing; responder is no longer received minor axis bridge joint SF request message, and the business that then discharges the responder transmission is protected the switching of passage from service aisle to this professional near side (ns) at the bridge joint of this professional near side (ns) protection passage and the business of responder reception.
The embodiment of the invention 6 also provides a kind of network equipment, can be used as the equipment of protecting the originating end of switching.As shown in figure 10, this equipment comprises:
Channel status detection module 101 is used to detect the service aisle of a certain business and the state of protection passage;
Bridge module 102, be used for all taking place when unusual when channel status detection module 101 detects the service aisle of described business and near side (ns) protection passage, the distal edge protection passage that the business that sends is bridged to the business of described transmission sends, or the service aisle that detects described business when described channel status detection module takes place when unusual, and the near side (ns) protection passage that the business that sends is bridged to the business of described transmission sends;
The result that bridge module 102 detects according to channel status selects to bridge to distal edge protection passage or near side (ns) protection passage.Such as, when the service aisle that detects a certain business and near side (ns) protection passage all takes place when unusual, originating end will be initiated the ring switching request, and initial ring is switched, and the business that bridge module 102 will send this moment bridges to the distal edge of the business of transmission and protects the passage transmission; When the service aisle that detects a certain business takes place when unusual, originating end will be initiated the span switching request, and span switching takes place, the business that bridge module 102 will send this moment bridge to this professional near side (ns) protection passage transmission.
Message transmission module 103, be used for all taking place when unusual when channel status detection module 101 detects the service aisle of described business and near side (ns) protection passage, send major diameter bridge joint request message and minor axis bridge joint request message, wherein said minor axis bridge joint request message and major diameter the bridge joint request message comprise the ring switching request message, make the responder device responds described unusual; Perhaps
The service aisle that detects described business when channel status detection module 101 takes place when unusual, send major diameter bridge joint request message and minor axis bridge joint request message, wherein said minor axis bridge joint request message and major diameter the bridge joint request message comprise the span switching solicited message, make the responder device responds described unusual;
When needs carried out ring switching, the major diameter that message transmission module 103 sends bridge joint request message and minor axis comprised the ring switching solicited message in the bridge joint request message; When needs carried out span switching, the major diameter that message transmission module 103 sends bridge joint request message and minor axis comprised the span switching solicited message in the bridge joint request message.The other end of respective segments receives that bridge joint request message and minor axis will respond this message during the bridge joint request message major diameter.
Message sink module 104 is used to receive from the major diameter of responder equipment bridge joint response message and minor axis bridge joint response message;
Switch module 105, be used for when business that bridge module 102 will send bridges to the distal edge protection passage of business of described transmission, the business that receives is switched to the distal edge protection passage reception of the business of reception from service aisle, perhaps receive described minor axis during the bridge joint response message when message sink module 103, when the bridge joint request message has comprised the ring switching solicited message as if described major diameter, the business that receives is switched to the distal edge protection passage reception of the business of reception from service aisle;
When perhaps the business that will send when bridge module 102 bridges to the near side (ns) protection passage of business of described transmission, the business that receives switched to the near side (ns) protection passage of the business that receives from service aisle receive.
In the practical application; because after originating end detects unusually; early started the switching action of ring (distal edge) bridge joint; but some the time; scenes such as APS agreement APS signaling communication abnormality is arranged on unusual, the ring on other high priority requests, the ring have for example also been produced in the reversed process on the corresponding protection passage; because consulting may be abundant inadequately, switch thereby may produce mistake.Mistake is switched adverse consequencess such as can causing professional wrong company.
Switch for fear of mistake, the embodiment of the invention can also comprise at originating end equipment:
Timing module 106 is used for picking up counting when bridge module 102 carries out bridge joint;
Release module 107, be used for the time period when timing module 106 timing finish, if message sink module 104 is not also received major diameter bridge joint response message and described major diameter when the bridge joint response message has comprised the ring switching solicited message, discharge the business that sends bridge joint at the distal edge protection passage of the business of described transmission; Perhaps
Time period when timing module timing 106 finishes; if message sink module 104 is not also received described minor axis bridge joint response message and described minor axis when bridge joint message has comprised the span switching solicited message, discharge the business that sends switching at the near side (ns) protection passage of the business of business from service aisle to described reception of the bridge joint of the near side (ns) protection passage of the business of described transmission and reception.
The embodiment of the invention 7 provides a kind of network equipment again, can be used as the equipment of protecting the responder of switching.As shown in figure 11, this equipment comprises:
Respond module 201, be used to receive major diameter bridge joint request message and minor axis bridge joint request message, when receiving described minor axis during the bridge joint request message, reply minor axis bridge joint response message and major diameter bridge joint response message to the transmit leg of described minor axis bridge joint request message;
Bridge module 202, be used for receiving that when respond module 201 minor axis is during the bridge joint request message, and when described minor axis when the bridge joint request message has comprised the ring switching request message, the distal edge protection passage that the business that sends is bridged to the business of described transmission sends, perhaps receive that described minor axis is during the bridge joint request message when respond module 201, and when described minor axis when the bridge joint request message has comprised the span switching request message, the near side (ns) protection passage that the business that sends is bridged to the business of described transmission sends;
Switch module 203, be used for receiving described major diameter bridge joint request message and described major diameter when the bridge joint request message has comprised the ring switching solicited message when respond module 201, the business that receives is switched to the distal edge protection passage reception of the business of reception from service aisle, perhaps receive described minor axis bridge joint response message and described minor axis when the bridge joint request message has comprised the ring switching solicited message when respond module 201, the business that receives is switched to the distal edge protection passage of the business that receives from service aisle receive;
Perhaps receive described minor axis bridge joint request message and described minor axis when the bridge joint request message has comprised the span switching solicited message when respond module 201, the business that receives is switched to the near side (ns) protection passage of the business that receives from service aisle receive.
In the practical application; because after originating end detects unusually; early started the switching action of ring (distal edge) bridge joint; but some the time; scenes such as APS agreement APS signaling communication abnormality is arranged on unusual, the ring on other high priority requests, the ring have for example also been produced in the reversed process on the corresponding protection passage; because consulting may be abundant inadequately, switch thereby may produce mistake.Mistake is switched adverse consequencess such as can causing professional wrong company.
Switch for fear of mistake, the embodiment of the invention can also comprise at responder equipment:
Timing module 204 is used for carrying out bridge from bridge module 202 and picks up counting on time;
Release module 205, be used for the time period when timing module 204 timing finish, if respond module 201 is no longer received described minor axis bridge joint request message and described minor axis when the bridge joint request message has comprised the span switching request message, discharge the business that sends switching at the near side (ns) protection passage of the business of business from service aisle to described reception of the bridge joint of the near side (ns) protection passage of the business of described transmission and reception; Perhaps
Time period when timing module 204 timing finish; if respond module 201 is not received major diameter bridge joint request message and described minor axis when the bridge joint request message has comprised the ring switching request message, discharge the business that sends bridge joint at the distal edge protection passage of the business of described transmission.
Can obviously find out from above embodiment; because all switching and bridge joint as far as possible early of originating end and responder are switched in protection; service outage duration is obviously reduced; and some the time; have on, the ring unusual under the situation such as other high priority requests as also having produced on the corresponding protection passage in the reversed process; because consulting may be abundant inadequately, may produces mistake and switch.For fear of the generation of this situation, the embodiment of the invention adopts switches timer, avoids the situation of protecting passage also to break down and can not switch, makes the enhancing of protection protocol stabilizes.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium.The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
More than the method for looped network protection switching provided by the present invention and the device that is used for looped network protection switching are described in detail; for one of ordinary skill in the art; thought according to the embodiment of the invention; part in specific embodiments and applications all can change; in sum, this description should not be construed as limitation of the present invention.
Claims (19)
1. a looped network protection switching method is characterized in that, described method comprises:
When the service aisle of a certain business and near side (ns) protection passage all take place when unusual, detect described unusual originating end, send major diameter bridge joint request message and minor axis the bridge joint request message and will bridge to this professional distal edge protection passage transmission from the business that originating end sends after, the business that described originating end receives is switched to this professional distal edge protection passage reception from service aisle, wherein, described minor axis bridge joint request message and major diameter the bridge joint request message comprise the ring switching solicited message;
When responder is received described minor axis during the bridge joint request message, reply minor axis bridge joint response message and major diameter bridge joint response message and will bridge to this professional distal edge protection passage from the business that described responder sends and send to originating end;
When responder is received described major diameter during the bridge joint request message, the business that described responder is received is switched to this professional distal edge protection passage from service aisle and is received.
2. the method for claim 1 is characterized in that, described method also comprises:
Switch timer in described originating end setting; the described timer of switching picks up counting when originating end carries out bridge joint; if the time period when finishing to timing; originating end is not received described major diameter bridge joint response message, and the business that then discharges the originating end transmission is protected the switching of passage from service aisle to this professional distal edge at the bridge joint of this professional distal edge protection passage and the business of originating end reception.
3. method as claimed in claim 1 or 2 is characterized in that, described method also comprises:
Switch timer in described responder setting; the described timer of switching picks up counting when responder carries out bridge joint; if the time period when finishing to timing, responder is not received described major diameter bridge joint request message, then discharges the bridge joint of the business of responder transmission at this professional distal edge protection passage.
4. a looped network protection switching method is characterized in that, described method comprises:
When the service aisle of a certain business and near side (ns) protection passage all take place when unusual, detect described unusual originating end, send major diameter bridge joint request message and minor axis bridge joint request message and will bridge to this professional distal edge protection passage transmission from the business that originating end sends, wherein, described minor axis bridge joint request message and major diameter the bridge joint request message comprise the ring switching solicited message;
When responder is received described minor axis during the bridge joint request message, reply minor axis bridge joint response message and major diameter bridge joint response message and will bridge to this professional distal edge protection passage from the business that described responder sends and send to originating end;
When described originating end is received described minor axis during the bridge joint response message, the business that described originating end is received is switched to this professional distal edge protection passage from service aisle and is received;
When described responder is received described major diameter during the bridge joint request message, the business that described responder is received is switched to this professional distal edge protection passage from service aisle and is received.
5. method as claimed in claim 4 is characterized in that, described method also comprises:
Switch timer in described originating end setting; the described timer of switching picks up counting when originating end carries out bridge joint; if the time period when finishing to timing; originating end is not received described major diameter bridge joint response message, and the business that then discharges the originating end transmission protects the distal edge of the bridge joint of passage and the business of business from service aisle to described originating end reception that originating end receives to protect switching of passage at this professional distal edge.
6. as claim 4 or 5 described methods, it is characterized in that described method also comprises:
Switch timer in described responder setting; the described timer of switching picks up counting when responder carries out bridge joint; if the time period when finishing to timing, responder is not received described major diameter bridge joint request message, then discharges the bridge joint of the business of responder transmission at this professional distal edge protection passage.
7. a looped network protection switching method is characterized in that, described method comprises:
When the service aisle of a certain business and near side (ns) protection passage all take place when unusual, detect described unusual originating end, send major diameter bridge joint request message and minor axis the bridge joint request message and will bridge to this professional distal edge protection passage transmission from the business that originating end sends after, the business that described originating end receives is switched to this professional distal edge protection passage reception from service aisle, wherein, described minor axis bridge joint request message and major diameter the bridge joint request message comprise the ring switching solicited message;
When responder receives that minor axis is during the bridge joint request message; to originating end reply major diameter bridge joint response message and minor axis the bridge joint response message and will bridge to this professional distal edge protection passage from the business that described responder sends and send after, the business that described responder is received is switched to this professional distal edge protection passage from service aisle and is received.
8. method as claimed in claim 7 is characterized in that, described method also comprises:
Switch timer in described originating end setting; the described timer of switching picks up counting when originating end carries out bridge joint; if the time period when finishing to timing; originating end is not received described major diameter bridge joint response message, and the business that then discharges the originating end transmission is protected the switching of passage from service aisle to this professional distal edge at the bridge joint of this professional distal edge protection passage and the business of originating end reception.
9. as claim 7 or 8 described methods, it is characterized in that described method also comprises:
Switch timer in described responder setting; the described timer of switching picks up counting when responder carries out bridge joint; if the time period when finishing to timing, responder is not received described major diameter bridge joint request message, then discharges the bridge joint of the business of responder transmission at this professional distal edge protection passage.
10. a looped network protection switching method is characterized in that, described method comprises:
When the service aisle of a certain business and near side (ns) protection passage all take place when unusual, detect described unusual originating end, send major diameter bridge joint request message and minor axis bridge joint request message and will bridge to this professional distal edge protection passage transmission from the business that originating end sends, wherein, described minor axis bridge joint request message and major diameter the bridge joint request message comprise the ring switching solicited message;
When responder receives that described minor axis is during the bridge joint request message, reply minor axis bridge joint response message and major diameter after bridge joint response message and the distal edge protection passage that will bridge to the business that described responder sends from the business that described responder sends have sent to originating end, the business that described responder is received is switched to this professional distal edge protection passage from service aisle and is received;
When described originating end is received described minor axis during the bridge joint response message, the business that described originating end is received is switched to this professional distal edge protection passage from service aisle and is received.
11. method as claimed in claim 10 is characterized in that, described method also comprises:
Switch timer in described originating end setting; the described timer of switching picks up counting when originating end carries out bridge joint; if the time period when finishing to timing; originating end is not received described major diameter bridge joint response message, and the business that then discharges the originating end transmission is protected the switching of passage from service aisle to this professional distal edge at the bridge joint of this professional distal edge protection passage and the business of originating end reception.
12., it is characterized in that described method also comprises as claim 10 or 11 described methods:
Switch timer in described responder setting; the described timer of switching picks up counting when responder carries out bridge joint; if the time period when finishing to timing, responder is not received described major diameter bridge joint request message, then discharges the bridge joint of the business of responder transmission at this professional distal edge protection passage.
13. a looped network protection switching method is characterized in that, described method comprises:
When the service aisle of a certain business takes place when unusual, detect described unusual originating end, send minor axis bridge joint request message and major diameter the bridge joint request message and will bridge to this professional near side (ns) from the business that originating end sends and protect passage after, the business that described originating end receives is switched to this professional near side (ns) protection passage reception from service aisle, wherein, described minor axis bridge joint request message and major diameter the bridge joint request message comprise the span switching solicited message;
Responder receives that described minor axis is during the bridge joint request message; to described originating end reply minor axis bridge joint response message and major diameter the bridge joint response message and will bridge to this professional near side (ns) protection passage from the business that described responder sends and send after, the business that described responder is received is switched to this professional near side (ns) protection passage from service aisle and is received.
14. method as claimed in claim 13 is characterized in that, described method also comprises:
Switch timer in described originating end setting; the described timer of switching picks up counting when originating end carries out bridge joint; if the time period when finishing to timing; originating end is not received described minor axis bridge joint response message, and the business that then discharges the originating end transmission is protected the switching of passage from service aisle to this professional near side (ns) at the bridge joint of this professional near side (ns) protection passage and the business of originating end reception.
15., it is characterized in that described method also comprises as claim 13 or 14 described methods:
Switch timer in described responder setting; the described timer of switching picks up counting when responder carries out bridge joint; if the time period when finishing to timing; responder is no longer received described minor axis bridge joint request message, then discharges the bridge joint of the business of responder transmission at this professional near side (ns) protection passage.
16. a network equipment is characterized in that, described equipment comprises:
The channel status detection module is used to detect the service aisle of a certain business and the state of protection passage;
Bridge module, be used for all taking place when unusual when described channel status detection module detects the service aisle of described business and near side (ns) protection passage, the distal edge protection passage that the business that sends is bridged to the business of described transmission sends, or take place when unusual when described channel status detection module only detects the service aisle of described business, the near side (ns) protection passage that the business that sends is bridged to the business of described transmission sends;
Message transmission module, be used for all taking place when unusual when described channel status detection module detects the service aisle of described business and near side (ns) protection passage, send major diameter bridge joint request message and minor axis bridge joint request message, wherein said minor axis bridge joint request message and major diameter the bridge joint request message comprise the ring switching request message, make the responder device responds described unusual; Perhaps
When only detecting the service aisle of described business, described channel status detection module takes place when unusual, send major diameter bridge joint request message and minor axis bridge joint request message, wherein said minor axis bridge joint request message and major diameter the bridge joint request message comprise the span switching solicited message, make the responder device responds described unusual;
The message sink module is used to receive from the major diameter of responder equipment bridge joint response message and minor axis bridge joint response message;
Switch module, be used for when distal edge protection passage that business that described bridge module will send bridges to the business of described transmission sends, the business that receives is switched to the distal edge protection passage reception of the business of described reception from service aisle, perhaps receive described minor axis during the bridge joint response message when described message sink module, when the bridge joint request message has comprised the ring switching solicited message as if described major diameter, the business that receives is switched to the distal edge protection passage reception of the business of described reception from service aisle;
When perhaps the business that will send when the described bridge module near side (ns) protection passage that bridges to the business of described transmission sends, the business that receives switched to the near side (ns) protection passage of the business of described reception from service aisle receive.
17. equipment as claimed in claim 16 is characterized in that, described equipment also comprises:
Timing module is used for picking up counting when described bridge module carries out bridge joint;
Release module, be used for the time period when described timing module timing finishes, if described message sink module is not also received described major diameter bridge joint response message and described major diameter when the bridge joint response message has comprised the ring switching solicited message, discharge the business that sends bridge joint at the distal edge protection passage of the business of described transmission; Perhaps
Time period when described timing module timing finishes; if described message sink module is not also received described minor axis bridge joint response message and described minor axis when the bridge joint response message has comprised the span switching solicited message, discharge the business that sends switching at the near side (ns) protection passage of the business of business from service aisle to described reception of the bridge joint of the near side (ns) protection passage of the business of described transmission and reception.
18. a network equipment is characterized in that, described equipment comprises:
Respond module, be used to receive major diameter bridge joint request message and minor axis bridge joint request message, when receiving described minor axis during the bridge joint request message, reply minor axis bridge joint response message and major diameter bridge joint response message to the transmit leg of described minor axis bridge joint request message;
Bridge module, be used for receiving that when described respond module described minor axis is during the bridge joint request message, and when described minor axis when the bridge joint request message has comprised the ring switching request message, the distal edge protection passage that the business that sends is bridged to the business of described transmission sends, perhaps receive that described minor axis is during the bridge joint request message when described respond module, and when described minor axis when the bridge joint request message has comprised the span switching request message, the near side (ns) protection passage that the business that sends is bridged to the business of described transmission sends;
Switch module, be used for receiving described major diameter bridge joint request message and described major diameter when the bridge joint request message has comprised the ring switching solicited message when described respond module, the business that receives is switched to the distal edge protection passage reception of the business of described reception from service aisle, perhaps receive described minor axis bridge joint request message and described minor axis when the bridge joint request message has comprised the ring switching solicited message when described respond module, the business that receives is switched to the distal edge protection passage of the business that receives from service aisle receive;
Perhaps receive described minor axis bridge joint request message and described minor axis when the bridge joint request message has comprised the span switching solicited message when described respond module, the business that receives is switched to the near side (ns) protection passage of the business that receives from service aisle receive.
19. equipment as claimed in claim 18 is characterized in that, described equipment also comprises:
Timing module is used for picking up counting when described bridge module carries out bridge joint;
Release module, be used for the time period when described timing module timing finishes, if described respond module is no longer received described minor axis bridge joint request message and described minor axis when the bridge joint request message has comprised the span switching request message, discharge the business that sends switching at the near side (ns) protection passage of the business of business from service aisle to described reception of the bridge joint of the near side (ns) protection passage of the business of described transmission and reception; Perhaps
Time period when described timing module timing finishes; if described respond module is not received major diameter bridge joint request message and described minor axis when the bridge joint request message has comprised the ring switching request message, discharge the business that sends bridge joint at the distal edge protection passage of the business of described transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710124933 CN101453288B (en) | 2007-12-06 | 2007-12-06 | Loop network protection method and network appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710124933 CN101453288B (en) | 2007-12-06 | 2007-12-06 | Loop network protection method and network appliance |
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| Publication Number | Publication Date |
|---|---|
| CN101453288A CN101453288A (en) | 2009-06-10 |
| CN101453288B true CN101453288B (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200710124933 Expired - Fee Related CN101453288B (en) | 2007-12-06 | 2007-12-06 | Loop network protection method and network appliance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109639549B (en) * | 2017-10-09 | 2021-11-05 | 中兴通讯股份有限公司 | Method for realizing ring network protection and ring network protection system |
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| CN1281302A (en) * | 1999-07-15 | 2001-01-24 | 深圳市华为技术有限公司 | Protective reversing and detecting method of synchronously triggered multiplexing band under multiple securities mechanism |
| CN1753323A (en) * | 2004-09-21 | 2006-03-29 | 华为技术有限公司 | Implementation method of protection exchanging in circular network |
| CN1753342A (en) * | 2004-09-21 | 2006-03-29 | 华为技术有限公司 | Method of implementing protection switching in light network |
| CN1756223A (en) * | 2004-09-28 | 2006-04-05 | 中兴通讯股份有限公司 | Optical transmission looped network rapid protection method |
| CN1801768A (en) * | 2004-12-31 | 2006-07-12 | 华为技术有限公司 | Multiplex section shared loop protecting method |
| CN101001123A (en) * | 2006-12-31 | 2007-07-18 | 华为技术有限公司 | Inversion method and device for optical transmission |
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2007
- 2007-12-06 CN CN 200710124933 patent/CN101453288B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281302A (en) * | 1999-07-15 | 2001-01-24 | 深圳市华为技术有限公司 | Protective reversing and detecting method of synchronously triggered multiplexing band under multiple securities mechanism |
| CN1753323A (en) * | 2004-09-21 | 2006-03-29 | 华为技术有限公司 | Implementation method of protection exchanging in circular network |
| CN1753342A (en) * | 2004-09-21 | 2006-03-29 | 华为技术有限公司 | Method of implementing protection switching in light network |
| CN1756223A (en) * | 2004-09-28 | 2006-04-05 | 中兴通讯股份有限公司 | Optical transmission looped network rapid protection method |
| CN1801768A (en) * | 2004-12-31 | 2006-07-12 | 华为技术有限公司 | Multiplex section shared loop protecting method |
| CN101001123A (en) * | 2006-12-31 | 2007-07-18 | 华为技术有限公司 | Inversion method and device for optical transmission |
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| CN101453288A (en) | 2009-06-10 |
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