CN100461737C - Elastic packet link point internal connection fault processing method and apparatus - Google Patents

Elastic packet link point internal connection fault processing method and apparatus Download PDF

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Publication number
CN100461737C
CN100461737C CNB2007100867223A CN200710086722A CN100461737C CN 100461737 C CN100461737 C CN 100461737C CN B2007100867223 A CNB2007100867223 A CN B2007100867223A CN 200710086722 A CN200710086722 A CN 200710086722A CN 100461737 C CN100461737 C CN 100461737C
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span
node
fault
simulation
generate
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CN101022389A (en
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王越
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2008/070372 priority patent/WO2008106883A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0677—Localisation of faults
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/437—Ring fault isolation or reconfiguration

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

An internal connection fault processing method of elastic packet ring node includes obtaining link analysis result from link state information of current RPR ring when internal connection fault is detected out by the first node on RPR ring, selecting the first SPAN to simulation-generate signal failure and sending SF signal to the other nodes on ring as well as selecting relevant SF signal transmission node number according to link analysis result. The internal connection fault processing device of elastic packet ring node is also disclosed.

Description

Elastic packet link point internal connection fault processing method and device
Technical field
The present invention relates to the network communications technology, relate in particular to Resilient Packet Ring (RPR, Resilient PacketRing) intra-node and connect fault handling method and device.
Background technology
RPR is a kind of networking structure of reverse twin nuclei, can be on two rings Data transmission simultaneously, as a kind of new metropolitan area network standard, because it is in the advantage of all many-sides such as interface bandwidth, carrier-class disturbance switching ability, high efficient band width utilance, physical layer have nothing to do, RPR is subjected to the favor of more and more operators gradually.
RPR ring referring to shown in Figure 1 comprises 6 RPR nodes on the ring, the clockwise monocycle in the outside is called 0 ring, and inboard anticlockwise monocycle is called 1 ring; The link section of being called (SPAN) between two adjacent R PR nodes, a SPAN is made up of the opposite one way link of a pair of direction; For each node, two SPAN are arranged, be called the west to SPAN and east orientation SPAN, wherein, the west is used to receive 0 loop data and sends 1 loop data to SPAN, and east orientation SPAN is used to receive 1 loop data and sends 0 loop data.
The fault self-recovery ability of RPR is very strong, can realize that the error protection in the 50ms time is switched.Owing to fault disconnects the RPR ring of connection,, can make all data flow avoid hindering for some reason and the link that disconnects referring to shown in Figure 2, realize the normal transmission of data flow through quick troubleshooting.Among Fig. 2, the SPAN that can not be used to transmit data is called the limit.Link failure has multiple situation, comprises Signal Fail (SF, Signal Fail) and Signal Degrade (SD, Signal degrade) etc.Wherein, the SF fault is the most serious, is bound to generate the limit, as fibercuts; SD represents that line quality is relatively poor, but can transmit data, can generate the limit under the certain condition.
In order to realize quick protective switch, each node all detects the state of self SPAN in real time on the RPR ring, and obtains the state that ring is gone up other SPAN by other node information releasing.When detecting variation, carry out analyzing and processing according to all data of having collected, make reaction fast.
At a RPR intranodal, east orientation SPAN may be distributed on the different hardware with the transmitting-receiving processing capacity of west to SPAN, and it is inner by optical fiber or cable connection.It also is the part of RPR ring that this inside connects, if inner the connection breaks down, can cause the fracture of RPR ring equally.
But at present to pay close attention to maximum be fault on the SPAN to agreement, and the processing that connects fault for the RPR intra-node is then too simple.Such as, be modeled as the west simply and SF take place to SPAN, perhaps be modeled as east orientation SPAN SF takes place, perhaps be modeled as two SPAN SF has all taken place.According to such processing method, connect fault if occur the RPR intra-node in actual applications, then under a stable condition, may cause serious accident.Simple example is: there has been the SF fault in the west of supposing node A and has generated the limit to SPAN, inner connection fault takes place after, generate SF if just choose at random east orientation SPAN simulation, then the result who handles like this is, two SPAN of node A generate the limit, all can not send data, and node A has disconnected from encircling fully, thereby damaged the connectedness of looped network, caused looped network unavailable fully.
Summary of the invention
The main purpose of the embodiment of the invention is to provide a kind of RPR intra-node to connect fault handling method and device, occurs at the RPR node guaranteeing the connectedness and the availability of looped network to greatest extent under the situation of inner connection fault.
For achieving the above object, it is as follows that RPR intra-node provided by the invention connects fault handling method:
When the first node on the RPR ring detected inside connection fault, the link-state information of being encircled by current RPR obtained the link analysis result;
From two section SPAN of first node, select SPAN simulation to generate Signal Fail SF according to the link analysis result, and go up other node to ring and send the SF signal, and the node number of the node number of SF signal transmission when selecting SPAN simulation to generate SF SF signal transmission when selecting the 2nd SPAN simulation to generate SF.
Described link analysis result is: first node has SPAN to generate the limit;
Describedly select SPAN simulation to generate SF from two SPAN of first node according to the link analysis result to comprise: the SPAN simulation of selecting to have generated the limit from two SPAN of first node generates SF.
Described link analysis result is: boundless but node that ring is gone up except that first node has SPAN to generate the limit among two SPAN of first node, and perhaps both boundless also fault-free but node that ring is gone up except that first node has SPAN generation limit among two of first node SPAN; Describedly select SPAN simulation to generate SF from two SPAN of first node according to the link analysis result to comprise: the nearest SPAN simulation in the limit from two SPAN of first node on the chosen distance ring generates SF.
Described link analysis result is: boundless but have SPAN to have fault among two SPAN of first node, it is all boundless but first node has SPAN to have fault that perhaps ring is gone up the SPAN of all nodes; Describedly from two SPAN of first node, select SPAN simulation to generate SF according to the link analysis result to comprise: from two SPAN of first node, select to exist the SPAN simulation of fault to generate SF.
Described link analysis result is: all boundless and first node of the SPAN of all nodes does not have SPAN and has fault on the ring, but the node that ring is gone up except that first node has SPAN to have fault; Describedly select SPAN simulation to generate SF from two SPAN of first node according to the link analysis result to comprise: the chosen distance ring exists the nearest SPAN simulation of link of fault to generate SF from two SPAN of first node.
This method further comprises: do not have the SF fault when detecting selecteed SPAN, and another SPAN of non-selected first node is when existing the SF fault, simulates selecteed SPAN and go up SF and disappear, and select another SPAN simulation of first node to generate SF.
RPR intra-node provided by the invention connects fault treating apparatus and comprises: memory cell and processing unit, wherein,
Memory cell, the link-state information that is used to store the RPR ring;
Processing unit, be used for when connection fault in inside takes place node, obtain RPR loop chain line state information from memory cell, obtain the link analysis result by link-state information, from two section SPAN that inner connection malfunctioning node takes place, select SPAN simulation to generate Signal Fail SF according to the link analysis result, and go up other node to ring and send the SF signal, and the node number of the node number of SF signal transmission when selecting SPAN simulation to generate SF SF signal transmission when selecting the 2nd SPAN simulation to generate SF.
Described processing unit comprises: acquiring unit, selected cell and transmitting element, wherein, acquiring unit, be used for when connection fault in inside takes place node, obtain RPR loop chain line state information from memory cell, obtain the link analysis result by link-state information, and the link analysis result is sent to selected cell; Selected cell is used for selecting SPAN simulation to generate SF according to the link analysis result who receives from inner two SPAN that connect malfunctioning node take place, and the SF information that generates is sent to transmitting element; Transmitting element is used for going up other node according to the SF information of receiving to ring and sends the SF signal.
Described processing unit further comprises: updating block, be used for not having the SF fault detecting a selecteed SPAN, and non-selected the 2nd SPAN is when existing the SF fault, and simulate a SPAN and go up SF and disappear, and select the 2nd SPAN simulation to generate SF.
This shows, in an embodiment of the present invention, when detecting the inner connection of RPR node generation fault, not careless to select a SPAN simulation to generate SF, but need from two SPAN that the inner node that connects fault takes place, select a SPAN simulation to generate SF according to the Link State of RPR ring.Such as, from two SPAN that inner connection malfunctioning node takes place, the SPAN simulation of selecting to have generated the limit or existing fault may generate the limit generates SF, perhaps chosen distance has encircled the nearest SPAN simulation of link that generates the limit or exist fault may generate the limit and has generated SF, to guarantee that the inner node that connects fault occurring can connect together with node as much as possible.Like this, just can under the situation that intra-node connection fault occurs, guarantee the connectedness and the availability of looped network to greatest extent, make looped network that service more reliably is provided.
Description of drawings
Fig. 1 is a RPR ring schematic diagram of the prior art.
Fig. 2 breaks the RPR ring schematic diagram of connection for prior art.
Fig. 3 is the process flow figure that the RPR intra-node connects fault in the embodiment of the invention.
Fig. 4 changes the flow chart that the SPAN simulation generates SF in the embodiment of the invention.
Fig. 5 is that the RPR intra-node in the embodiment of the invention connects the fault treating apparatus structural representation.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, the embodiment that develops simultaneously with reference to the accompanying drawings is described in further detail the present invention.
The RPR intra-node that the embodiment of the invention provides connects fault handling method and mainly comprises: when the first node on the RPR ring detected inside connection fault, the link-state information of being encircled by current RPR obtained the link analysis result; And from two SPAN of first node, select SPAN simulation to generate SF according to the link analysis result, go up other node to ring then and send the SF signal, and, the node number of SF signal transmission when the node number of SF signal transmission generates SF greater than selection the 2nd SPAN simulation when selecting SPAN simulation to generate SF.
That is to say that when connection fault in inside takes place the node on the RPR ring, need select SPAN simulation generation SF in conjunction with the current link-state information of RPR ring, the inner node that connects fault occurring with assurance can connect together with node as much as possible.Like this, just can occur guaranteeing the connectedness and the availability of looped network to greatest extent under the situation of inner connection fault, make looped network that service more reliably is provided at node.
Wherein, the Link State of described RPR ring had both comprised the state of two SPAN of the node that inner connection fault takes place, comprised that also it is the state of other SPAN that ring is gone up other link.Each node on the RPR ring all detects the state of self SPAN in real time, and obtains the state that ring is gone up other SPAN by other node information releasing.Link State comprises specifically whether link has generated the limit, whether link exists information such as fault.
Wherein, link analysis is the result comprise: among two SPAN of first node whether limit or fault are arranged, whether other node on the ring except that first node has limit or fault etc.
Below in conjunction with Fig. 3 RPR intra-node provided by the invention is connected fault handling method and be elaborated, referring to shown in Figure 3, this method mainly may further comprise the steps:
Each node on the step 301:RPR ring detects the inside connection status of self in real time, when first node detect self take place inner connect fault after, then check the link-state information of RPR ring, and judge among two SPAN of this node whether the limit is arranged, if have, then execution in step 302; Otherwise, execution in step 303.
Step 302: the SPAN simulation of selecting to have generated the limit from two SPAN of first node generates SF, the processing of process ends then.
Because this SPAN has been the limit, therefore select this SPAN simulation to generate the change in topology that SF can not cause the RPR ring, can not exert an influence to the transmission that encircles data flow.
If two SPAN of first node are the limits, then can select any one SPAN simulation wherein to generate SF.
Step 303: first node is gone up other node information releasing according to ring can know the upward state of other link of ring, and judges in view of the above ring goes up in other the link whether the limit is arranged, if having, then execution in step 304; Otherwise, execution in step 305.
Step 304: the nearest SPAN simulation in the limit from two SPAN of first node on the chosen distance ring generates SF, the processing of process ends then.
Wherein, the nearest SPAN in limit on the described rang ring is meant the SPAN that can arrive that direction on limit through the shortest jumping figure.Such as in Fig. 1, if inner connection fault takes place node A, and does not all have the limit among two SPAN of known node, the west of Node B generates the limit to SPAN, then node A will select the west of self to generate SF to the SPAN simulation this moment, because the west of node A is nearest to SPAN from the west of Node B to SPAN.Such system of selection can make the node of the inner connection of generation fault and node as much as possible link together, and realizes the raising of looped network connectedness.
Step 305: first node judges whether two SPAN of this node exist fault, if exist, then execution in step 306; Otherwise, execution in step 307.
Step 306: first node selects to exist the SPAN simulation of fault to generate SF, the processing of process ends then from two SPAN of this node.
If there is fault in two SPAN of first node, then can select any one SPAN simulation wherein to generate SF, because exist the SPAN of fault all might generate the limit.
Step 307: first node judges whether exist fault, if exist, then execution in step 308 if encircling the link of going up other; Otherwise, execution in step 309.
Step 308: first node exists the link of fault recently, promptly can arrive this SPAN that has faulty link simulation generation SF, processing of process ends then through the shortest jumping figure from two SPAN of this node on the chosen distance ring.
Step 309: both boundless, also do not have any fault if in all links on ring, then first node can select a SPAN to simulate generation SF, the processing of process ends then from two SPAN of this node arbitrarily.
After simulation generated SF, first node can be given this information broadcast other node on the ring, made data flow no longer transmit by the SPAN of this simulation generation SF, to guarantee the availability of looped network.
Need to prove, in the step 301 when first node judge among self two SPAN boundless after, can first execution in step 305; Execution in step 303 again after step 305 draws negative judged result; Execution in step 307 again after step 303 draws negative judged result.That is to say whether first node is judged earlier among two SPAN of this node has the limit or whether have fault, whether under the both boundless also trouble-free situation of two SPAN of this node, judging on the ring has the limit or whether have fault in other link again.
And after step 301,303 or 305 drew negative judged result, first node also can directly select a SPAN simulation to generate SF from two SPAN of this node arbitrarily, and the processing of process ends.
As seen, in the present embodiment, taking place innerly when connecting fault when detecting the RPR node, is not at will to select a SPAN simulation to generate SF, but need select a SPAN simulation to generate SF from two SPAN that the inner node that connects fault takes place according to the Link State of RPR ring.Such as, from two SPAN that inner connection malfunctioning node takes place, the SPAN simulation of selecting to have generated the limit or existing fault may generate the limit generates SF, perhaps chosen distance has encircled the nearest SPAN simulation of link that generates the limit or exist fault may generate the limit and has generated SF, to guarantee that the inner node that connects fault occurring can connect together with node as much as possible.Like this, just can under the situation that intra-node connection fault occurs, guarantee the connectedness and the availability of looped network to greatest extent, make looped network that reliable service is provided.
In addition,, make looped network that more reliable service can be provided in order to guarantee to simulate the accuracy that generates SF, after certain SPAN of simulation generates SF, can also be in real time according to the variation of ring network topology information and Link State, the SPAN that simulation is generated SF changes.
Detecting the situation that the SPAN state of this node changes with first node below is example, is elaborated to changing the process that the SPAN simulation generates SF.Referring to shown in Figure 4, this process mainly may further comprise the steps:
Step 401: first node detects the state of two SPAN of this node in real time, and judges whether to detect variation, if then execution in step 402; Otherwise, the processing of process ends.
Step 402: first node judges self whether there is the inner fault that connects, if then execution in step 403; Otherwise, the processing of process ends.
Step 403: whether the SPAN of selected simulation generation SF really existed the SF fault at present when the first node judgement connected fault in processing inside before, if, the then processing of process ends; Otherwise, execution in step 404.
Step 404: first node judges whether another SPAN (for the SPAN that the simulation of selecting before generates SF) of this node exists the SF fault, if then execution in step 405; Otherwise, the processing of process ends.
Step 405: the SPAN that selects before the first node simulation goes up SF and disappears, and selects another SPAN simulation to generate SF.
In addition, corresponding RPR intra-node provided by the invention connects fault handling method, and the present invention also provides a kind of RPR intra-node to connect fault treating apparatus.Referring to shown in Figure 5, this device comprises: memory cell and processing unit.Wherein, memory cell, the link-state information that is used to store the RPR ring; Processing unit, be used for when connection fault in inside takes place the RPR node, obtain RPR loop chain line state information from memory cell, obtain the link analysis result by link-state information, from two SPAN that inner connection malfunctioning node takes place, select SPAN simulation to generate SF according to the link analysis result, and go up other node to ring and send the SF signal, and the node number of the node number of SF signal transmission when selecting SPAN simulation to generate SF SF signal transmission when selecting the 2nd SPAN simulation to generate SF.
Described processing unit specifically can comprise: acquiring unit, selected cell and transmitting element.Wherein, acquiring unit is used for obtaining RPR loop chain line state information from memory cell when connection fault in inside takes place node, obtains the link analysis result by link-state information, and the link analysis result is sent to selected cell; Selected cell is used for selecting SPAN simulation to generate SF according to the link analysis result who receives from inner two SPAN that connect malfunctioning node take place, and the SF information that generates is sent to transmitting element; Transmitting element is used for going up other node according to the SF information of receiving to ring and sends the SF signal.
In addition, described processing unit can further comprise: updating block be used for not having the SF fault detecting a described selecteed SPAN, and non-selected the 2nd SPAN is when existing the SF fault, simulate a SPAN and go up the SF disappearance, and select the 2nd SPAN simulation to generate SF.
The above has carried out further detailed description to purpose of the present invention, technical scheme and beneficial effect; institute is understood that; the above is not in order to restriction the present invention; within the spirit and principles in the present invention all; any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (11)

1. a RPR intra-node connects fault handling method, it is characterized in that this method comprises:
When the first node on the RPR ring detected inside connection fault, the link-state information of being encircled by current RPR obtained the link analysis result;
From two section SPAN of first node, select SPAN simulation to generate Signal Fail SF according to the link analysis result, and go up other node to ring and send the SF signal, and the node number of the node number of SF signal transmission when selecting SPAN simulation to generate SF SF signal transmission when selecting the 2nd SPAN simulation to generate SF.
2. method according to claim 1 is characterized in that, described link analysis result is: first node has SPAN to generate the limit;
Describedly select SPAN simulation to generate SF from two SPAN of first node according to the link analysis result to comprise: the SPAN simulation of selecting to have generated the limit from two SPAN of first node generates SF.
3. method according to claim 1 is characterized in that, described link analysis result is: boundless but node that ring is gone up except that first node has SPAN generation limit among two SPAN of first node;
Describedly select SPAN simulation to generate SF from two SPAN of first node according to the link analysis result to comprise: the nearest SPAN simulation in the limit from two SPAN of first node on the chosen distance ring generates SF.
4. method according to claim 1 is characterized in that, described link analysis result is: both boundless also fault-free among two SPAN of first node but node that ring is gone up except that first node has SPAN generation limit;
Describedly select SPAN simulation to generate SF from two SPAN of first node according to the link analysis result to comprise: the nearest SPAN simulation in the limit from two SPAN of first node on the chosen distance ring generates SF.
5. method according to claim 1 is characterized in that, described link analysis result is: boundless but have SPAN to have fault among two SPAN of first node;
Describedly from two SPAN of first node, select SPAN simulation to generate SF according to the link analysis result to comprise: from two SPAN of first node, select to exist the SPAN simulation of fault to generate SF.
6. method according to claim 1 is characterized in that, described link analysis result is: the SPAN of all nodes is boundless but first node has SPAN to have fault on the ring;
Describedly from two SPAN of first node, select SPAN simulation to generate SF according to the link analysis result to comprise: from two SPAN of first node, select to exist the SPAN simulation of fault to generate SF.
7. method according to claim 1 is characterized in that, described link analysis result is: all boundless and first node of the SPAN of all nodes does not have SPAN and has fault on the ring, but the node that ring is gone up except that first node has SPAN to have fault;
Describedly select SPAN simulation to generate SF from two SPAN of first node according to the link analysis result to comprise: the chosen distance ring exists the nearest SPAN simulation of link of fault to generate SF from two SPAN of first node.
8. according to each described method of claim 1 to 7, it is characterized in that this method further comprises:
Do not have the SF fault when detecting selecteed SPAN, and another SPAN of non-selected first node is when existing the SF fault, simulates selecteed SPAN and go up SF and disappear, and select another SPAN simulation of first node to generate SF.
9. a RPR intra-node connects fault treating apparatus, it is characterized in that, comprising: memory cell and processing unit, wherein,
Memory cell, the link-state information that is used to store the RPR ring;
Processing unit, be used for when connection fault in inside takes place node, obtain RPR loop chain line state information from memory cell, obtain the link analysis result by link-state information, from two section SPAN that inner connection malfunctioning node takes place, select SPAN simulation to generate Signal Fail SF according to the link analysis result, and go up other node to ring and send the SF signal, and the node number of the node number of SF signal transmission when selecting SPAN simulation to generate SF SF signal transmission when selecting the 2nd SPAN simulation to generate SF.
10. device according to claim 9 is characterized in that, described processing unit comprises: acquiring unit, selected cell and transmitting element, wherein,
Acquiring unit is used for obtaining RPR loop chain line state information from memory cell when connection fault in inside takes place node, obtains the link analysis result by link-state information, and the link analysis result is sent to selected cell;
Selected cell is used for selecting SPAN simulation to generate SF according to the link analysis result who receives from inner two SPAN that connect malfunctioning node take place, and the SF information that generates is sent to transmitting element;
Transmitting element is used for going up other node according to the SF information of receiving to ring and sends the SF signal.
11. device according to claim 10, it is characterized in that, described processing unit further comprises: updating block, be used for not having the SF fault detecting a selecteed SPAN, and when there is the SF fault in non-selected the 2nd SPAN, simulate a SPAN and go up the SF disappearance, and select the 2nd SPAN simulation to generate SF.
CNB2007100867223A 2007-03-06 2007-03-06 Elastic packet link point internal connection fault processing method and apparatus Expired - Fee Related CN100461737C (en)

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PCT/CN2008/070372 WO2008106883A1 (en) 2007-03-06 2008-02-28 Method and device for disposing inner connecting faults of resilient packet ring nodes

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CN101355502B (en) * 2008-09-02 2010-12-29 中兴通讯股份有限公司 Method for transferring link state from one point to multiple points based on elastic grouping ring

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