CN102104534A - Method and system for protecting multicast service - Google Patents
Method and system for protecting multicast service Download PDFInfo
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- CN102104534A CN102104534A CN200910261317XA CN200910261317A CN102104534A CN 102104534 A CN102104534 A CN 102104534A CN 200910261317X A CN200910261317X A CN 200910261317XA CN 200910261317 A CN200910261317 A CN 200910261317A CN 102104534 A CN102104534 A CN 102104534A
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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
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
Abstract
The invention discloses a method and a system for protecting a multicast service. The method comprises the following steps of: determining that one or more multicast paths of multicast paths protected by a protection path are failed; and switching a multicast service transmitted on a predetermined multicast path to the protection path for transmission, wherein the predetermined multicast path is the multicast path which has the highest priority level and is transmitted in the one or more multicast paths. By the method and the system, the expenses of the protection resources are saved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of multicasting service protecting method and system.
Background technology
Along with constantly carrying out of multicast services such as IPTV, will become the main business of Virtual network operator at following multicast service.Therefore, for multicast service provides protection very big meaning is arranged.
In the correlation technique, generally be that root node by multicast path sends connectivity testing message to its leaf node and detects the multicast individual path and whether have fault.Leaf node does not also receive the connectivity testing message that root node sends in the set time on some individual paths, then to failure of connectivity notification packet of root node feedback, so that root node triggers the switching and the protection of end-to-end path.In the prior art, multicast path and protection path thereof are one to one, that is, realization be the protection of 1:1, but this mode is to protection being in great demand of path, and the utilization rate in protection path is not high.
Summary of the invention
The object of the present invention is to provide a kind of multicasting service protecting method and system, big to solve the multicast path guard method that exists in the correlation technique to the demand in protection path, and the not high problem of protection path utilization rate.
One aspect of the present invention provides a kind of multicasting service protecting method, and this method comprises: the one or more multicast paths in the multicast path of definite protection trail protection break down; The multicast service that transmits on the predetermined multicast path switched on the protection path transmit, wherein, predetermined multicast path is the highest multicast path of priority of the multicast service that transmits in one or more multicast paths.
Another aspect of the present invention provides a kind of multi-cast service protection system, and this system comprises: determination module is used for determining that one or more multicast paths of the multicast path of protection trail protection break down; Handover module, the multicast service that is used for transmitting on will predetermined multicast path switches on the protection path and transmits, and wherein, predetermined multicast path is the highest multicast path of priority of the multicast service that transmits in one or more multicast paths.
By the present invention; adopt the corresponding a plurality of multicast paths in protection path; under the situation that one or more multicast paths of being responsible for protecting in the protection path break down; the business of the multicast path that selection is the highest with the multicast service priority of transmission switches on this protection path to be transmitted; it is big to the demand in protection path to have solved the multicast path guard method that exists in the correlation technique; and protect the not high problem of path utilization rate, saved the expense of resource conservation.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the multicasting service protecting method of the embodiment of the invention;
Fig. 2 is an exemplary advertised information message structure schematic diagram according to the embodiment of the invention;
Fig. 3 is the path ID TLV message structure schematic diagram according to the embodiment of the invention;
Fig. 4 is the detail flowchart according to the multicasting service protecting method of the embodiment of the invention;
Fig. 5 is the application scenarios schematic diagram of the multicasting service protecting method of the example 1 according to the present invention;
Fig. 6 is the structured flowchart according to the multi-cast service protection system of the embodiment of the invention;
Fig. 7 is the detailed block diagram according to the multi-cast service protection system of the embodiment of the invention;
Fig. 8 is the another detailed block diagram according to the multi-cast service protection system of the embodiment of the invention;
Fig. 9 is the detailed block diagram of the multi-cast service protection system of the example 2 according to the present invention.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
The embodiment of the invention provides a kind of multicasting service protecting method, and Fig. 1 is the flow chart according to the multicasting service protecting method of the embodiment of the invention, and as shown in Figure 1, this method comprises:
Step S102, the one or more multicast paths in the multicast path of definite protection trail protection break down;
Step S104 switches to the multicast service that transmits on the predetermined multicast path on the protection path and to transmit, and wherein, predetermined multicast path is the highest multicast path of priority of the multicast service that transmits in one or more multicast paths.
By this method; can realize protecting sharing of path; under the situation that one or more multicast paths break down; the priority of the business by multicast path transmission determines to protect the multicast path of trail protection; this method can reduce the expense in protection path, improves the utilance in protection path.
Preferably, the multicast service that transmits on the predetermined multicast path is switched on the protection path transmit and to comprise: determine predetermined multicast path, and send professional switching notice to the root node of predetermined multicast path; After the root node of predetermined multicast path receives professional switching notice, stop on the predetermined multicast path and send multicast service, and multicast service switched on the protection path send.
By this process, after having determined predetermined multicast path, send professional switching notice, and by the switching of root node (also the claiming transmitting terminal) realizing route of predetermined multicast path, switching mode is fairly simple directly to the root node of multicast path.
Preferably, determine after the predetermined multicast path sign of being scheduled to multicast path to be notified to the leaf node of protecting the path, wherein, the leaf node in protection path comprises the leaf node of all multicast paths of protecting trail protection; The root node of predetermined multicast path with multicast service switch to send on the protection path after, the leaf node in protection path is according to the sign receiving multicast business.
The leaf node of protection under the path can be all nodes under the multicast path of its protection; in order to make correct leaf node receive corresponding multicast service; can be by send the sign of predetermined multicast path to leaf node; and identify the mode of receiving multicast business to realize according to this by leaf node; preferably, this sign can be notified to the root node of predetermined multicast path simultaneously.This sign can be the sign that has comprised the root node and the leaf node of predetermined multicast path, can also be other form, for example, stores at leaf node under the situation of sign of its root node, can only send the sign of predetermined multicast path root node.In reality was implemented, the sign of predetermined multicast path can be carried in the advertised information message and send, and showed the form of an exemplary advertised information message as Fig. 2, and wherein Path IDTLV message structure as shown in Figure 3.In order to describe the method that the embodiment of the invention provides better, provided concrete message format by Fig. 2 and Fig. 3, it should not constitute improper qualification of the present invention.
Preferably; the leaf node in protection path comprises according to the sign receiving multicast business: the leaf node in protection path is judged sign, and the sign with the corresponding multicast path of the leaf node in protection path is identical, if then receive corresponding multicast service; otherwise, abandon corresponding multicast service.By this process, the leaf node under the predetermined multicast path can correctly receive corresponding multicast service, and the leaf node under the non-predetermined multicast path can misconnection not received wrong multicast service.
Preferably, the one or more multicast paths in the multicast path of definite protection trail protection break down and comprise: the root node of each multicast path in one or more multicast paths sends faulty indication to the root node in protection path; The root node in protection path breaks down according to the one or more multicast paths in the multicast path of the definite protection of faulty indication trail protection.In this method, determine that according to the faulty indication that receives one or more multicast paths break down by the root node in protection path, this method is more direct.In actual applications, can also be that the multicast path that breaks down sends to pre-configured third-party server or network element with faulty indication, define one or more multicast paths by this third-party server or network element and break down.
Preferably, the root node of each multicast path in one or more multicast paths is before the root node in protection path sends faulty indication, and the root node of each multicast path sends connectivity testing message to leaf node separately; Leaf node do not receive under the situation of connectivity testing message in the given time, sends the signalling trouble message to the root node of the multicast path of leaf node correspondence.
Need to prove; determine that more than the process that one or more multicast paths broke down, determined that predetermined multicast path and notice multicast service switch all can be by third-party server and network element execution; can be carried out by the root node in protection path, the embodiment of the invention does not limit this yet.
Describe the processing procedure of the multicasting service protecting method that the embodiment of the invention provides in detail below in conjunction with Fig. 4, may further comprise the steps:
Step 401, by the root node (that is, the root node of multicast path) of multicast service periodically (also can be other triggering mode, for example, manual activation or the like) send connectivity testing message along multicast path to each leaf node;
Step 402 receives connectivity testing message by leaf node;
Step 403 if leaf node does not also receive the connectivity testing message that root node sends within a certain period of time, then generates a fault notification message, turns back to root node, has had fault with this multicast path of notice root node;
Step 404, the root node of multicast service are after recognizing that there is fault in multicast path, and then the root node to its protection path sends an advertised information (that is, faulty indication), have fault with this multicast path of root node in advertisement protection path;
Step 405, protection path root node receives its each operating path of being responsible for protecting (promptly, multicast path) goes up the fault notification information that root node sends over,, select wherein the multicast service of limit priority to protect according to the priority of the multicast service of each multicast path transmission;
Step 406, (that is, the multicast path of the business that transmission priority is the highest) sequence number (that is, a form of expression of sign) sends to each leaf node on the protection path along the protection path direction to the protection path root node multicast path that this is selected;
Step 407, the root node (that is, the root node of the multicast path of the business that transmission priority is the highest) of chosen that multicast service of protection path root node announcement carries out business and switches, and promptly business will send from the protection path;
Step 408, when the multicast path of the highest business of transmission priority (promptly, predetermined multicast path) root node that root node receives the protection path send over professional switch notification packet after, then the multicast service that will be scheduled to transmit on the multicast path all is transformed into and protects the path to send; Whether and these business are after the path is sent to each leaf node by protection, be receiving node on this multicast service by each leaf node according to this node, handle accordingly: if then receive and handle this service message; If not, directly abandon after then receiving.Above-mentioned leaf node judge this node whether be sequence number that receiving node on this multicast service can be by judging multicast path whether with identical realization of sequence number of the corresponding multicast path of this leaf node, if it is identical, then this leaf node is the recipient node on this multicast service, otherwise this leaf node is not the receiving node on this multicast service.
Example 1
Processing procedure below in conjunction with Fig. 5 comes to describe by instantiation the multicasting service protecting method that the embodiment of the invention provides may further comprise the steps:
Step 501, existing two multicast paths are respectively multicast path 1 (100-multicast path 1-101; 102; 103) and multicast path 2 (120-multicast path 2-104,105,106); and be that (110-protects path-101 in this share protect path of two multicast path configurations; 102,103,104; 105,106).
Step 502 on each multicast path, periodically sends connectivity testing messages along multicast path to separately leaf node 101,102,103 and 104,105,106 by root node 100 and 120.When arbitrary leaf node is wherein also confiscated the connectivity testing message that root node sends within a certain period of time, then generate a fault notification message (that is, the signalling trouble message), send to its root node 100 or 120.
Step 503, if multicast path 1 breaks down, then its root node 100 receives leaf node feedback and comes after the fault notification information root node 110 announcement fault messages on its protection path.
Step 504 after root node 110 is received the fault message that the root node feedback is come on other multicast paths on the protection path, is carried out service priority relatively, selects the higher multicast path of priority to protect.If select multicast path 1, then this multicast path sequence number got up with TLV message form (also can be other message forms) encapsulation, by the notification packet of correspondence, (110-protects path-101,102,103 along the protection path, 104,105,106) direction sends to each leaf node 101,102,103,104,105,106; Simultaneously, the root node 100 to protected multicast service 1 feeds back handoff request messages (that is professional switching notice).
Step 505, each leaf node 101 on the protection path, 102,103,104,105,106 after receiving its multicast path sequence number notification packet, judge that according to multicast path sequence number in the message whether this leaf node is the receiving node on this protected multicast path, if not, then the follow-up service message that sends over is directly lost processing; If then the follow-up service message that sends over is received and handles this message.
Step 506 when the root node 100 of protected multicast service 1 receives handoff request information, then switches to this node transmission multicast service message on the protection path and transmits.
Step 507, (110-protects path-101,102 from the protection path when this multicast path 1; 103,104,105; 106) transmitting multicast service to each leaf node, after the judgement of each leaf node according to step 505, is not the leaf node 104 of this multicast path 1; 105,106 direct discarding traffic messages are opposite; it is the leaf node 101 of this multicast path 1; behind 102, the 103 reception service messages, handle and analyze.Deterministic process in the step 505 also can be carried out in step 507.
As can be seen from the above description, the multicasting service protecting method that the embodiment of the invention provides has been realized the 1:n share protect to multicast service, has saved the expense of resource conservation.
According to embodiments of the invention, a kind of multi-cast service protection system also is provided, Fig. 6 is the structured flowchart according to the multi-cast service protection system of the embodiment of the invention, as shown in Figure 6, this system comprises: determination module 62, and the one or more multicast paths that are used for the multicast path of definite protection trail protection break down; Handover module 64; be connected in determination module 62; the multicast service that is used for being scheduled to transmit on the multicast path switches on the protection path and transmits, and wherein, predetermined multicast path is the highest multicast path of priority of the multicast service that transmits in one or more multicast paths.
Fig. 7 is the detailed block diagram according to the multi-cast service protection system of the embodiment of the invention, and as shown in Figure 7, on the basis of Fig. 6, handover module 64 can comprise: first determining unit 71 is used for determining predetermined multicast path; Transmitting element 72; be connected in first determining unit 71; be used for sending professional switching notice to the root node of predetermined multicast path; so that after the root node of predetermined multicast path receives professional switching notice; stop on the predetermined multicast path and send multicast service, and multicast service switched on the protection path send.
Fig. 8 is the another detailed block diagram according to the multi-cast service protection system of the embodiment of the invention; as shown in Figure 8; on the basis of Fig. 7; handover module 64 can also comprise: notification unit 82; be connected in first determining unit 71 and transmitting element 72; the sign that is used for being scheduled to multicast path is notified to the leaf node in protection path; so that it is professional that the leaf node in protection path receives according to sign; wherein, the leaf node in protection path comprises the leaf node of all multicast paths of protecting trail protection.Determination module 62 comprises: receiving element 84 is used for receiving the faulty indication from the root node of each multicast path of one or more multicast paths; Second determining unit 86 is connected in receiving element 84, is used for determining that according to faulty indication one or more multicast paths of the multicast path of protection trail protection break down.
Example 2
Fig. 9 is the detailed block diagram of the multi-cast service protection system of the example 2 according to the present invention, and as shown in Figure 9, this system comprises:
Detection of connectivity module: comprise connective packet sending unit, can be positioned at the multicast path root node, be used for sending connectivity testing message to leaf node along multicast path, also comprise the leaf node judging unit, can be positioned at leaf node, be used in the set time, not receiving under the situation of connectivity testing message to multicast path root node feedback failure of connectivity notification packet.
Protection service selection and announcement module: comprise protection service selection unit, can be positioned at the root node in protection path, be used for the priority that is subjected to the multicast service of fault effects according to a plurality of, select the pairing multicast path of the highest multicast service of one of them priority to protect; Also comprise the service announcement unit, be used to generate a multicast path sequence number advertised information message, the sequence number of multicast path is announced to each leaf node on the protection path.
The handover module of service path: can be positioned at protection path root node; be used for behind the selected good multicast path and announcement leaf node that needs to protect; the transmitting terminal of notifying this multicast path (promptly; root node); stop at the business that sends on the former operating path, switch to the protection path and carry out the transmission of multicast service.
In sum, the multi-cast service protection scheme that the embodiment of the invention provides can realize the shared protection path of a plurality of multicast paths, has reduced the expense in protection path.
Need to prove, can in computer system, carry out in the step shown in the flow chart of accompanying drawing such as a set of computer-executable instructions, and, though there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a multicasting service protecting method is characterized in that, comprising:
One or more multicast paths in the multicast path of definite protection trail protection break down;
The multicast service that transmits on the predetermined multicast path switched on the described protection path transmit, wherein, described predetermined multicast path is the highest multicast path of priority of the multicast service that transmits in described one or more multicast path.
2. method according to claim 1 is characterized in that, the multicast service that transmits on the described predetermined multicast path is switched to carry out transmission package on the described protection path and draw together:
Determine described predetermined multicast path, and send professional switching notice to the root node of described predetermined multicast path;
After the root node of described predetermined multicast path receives described professional switching notice, stop on the described predetermined multicast path and send multicast service, and described multicast service switched on the described protection path send.
3. method according to claim 2 is characterized in that,
Determine after the described predetermined multicast path, described method also comprises: the leaf node that the sign of described predetermined multicast path is notified to described protection path, wherein, the leaf node in described protection path comprises the leaf node of all multicast paths of described protection trail protection;
The root node of described predetermined multicast path with described multicast service switch on the described protection path send after, described method also comprises: the leaf node in described protection path receives described multicast service according to described sign.
4. method according to claim 3 is characterized in that, the leaf node in described protection path receives described multicast service according to described sign and comprises:
The leaf node in described protection path is judged described sign, and the sign with the corresponding multicast path of the leaf node in described protection path is identical, if, then receive described multicast service, otherwise, described multicast service abandoned.
5. method according to claim 1 is characterized in that, determines that one or more multicast paths in the multicast path of described protection trail protection break down to comprise:
The root node of each multicast path in described one or more multicast path sends faulty indication to the root node in described protection path;
The root node in described protection path determines that according to described faulty indication the one or more multicast paths in the multicast path of described protection trail protection break down.
6. method according to claim 5 is characterized in that, the root node of described each multicast path in described one or more multicast paths is before the root node in described protection path sends faulty indication, and described method also comprises:
The root node of described each multicast path sends connectivity testing message to leaf node separately;
Described leaf node do not receive under the situation of described connectivity testing message in the given time, sends the signalling trouble message to the root node of the multicast path of described leaf node correspondence.
7. a multi-cast service protection system is characterized in that, comprising:
Determination module, the one or more multicast paths that are used for the multicast path of definite protection trail protection break down;
Handover module, the multicast service that is used for transmitting on will predetermined multicast path switches on the described protection path and transmits, and wherein, described predetermined multicast path is the highest multicast path of priority of the multicast service that transmits in described one or more multicast path.
8. system according to claim 7 is characterized in that, described handover module comprises:
First determining unit is used for determining described predetermined multicast path;
Transmitting element; be used for sending professional switching notice to the root node of described predetermined multicast path; so that after the root node of described predetermined multicast path receives described professional switching notice; stop on the described predetermined multicast path and send multicast service, and described multicast service switched on the described protection path send.
9. system according to claim 8 is characterized in that, described handover module also comprises:
Notification unit; be used for the sign of described predetermined multicast path is notified to the leaf node in described protection path; so that the leaf node in described protection path receives described business according to described sign; wherein, the leaf node in described protection path comprises the leaf node of all multicast paths of described protection trail protection.
10. system according to claim 9 is characterized in that, described determination module comprises:
Receiving element is used for receiving the faulty indication from the root node of each multicast path of described one or more multicast paths;
Second determining unit is used for determining that according to described faulty indication one or more multicast paths of the multicast path of described protection trail protection break down.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910261317.XA CN102104534B (en) | 2009-12-17 | 2009-12-17 | Method and system for protecting multicast service |
| PCT/CN2010/071739 WO2010148717A1 (en) | 2009-12-17 | 2010-04-13 | Method and system for protecting multicast service |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910261317.XA CN102104534B (en) | 2009-12-17 | 2009-12-17 | Method and system for protecting multicast service |
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| CN102104534A true CN102104534A (en) | 2011-06-22 |
| CN102104534B CN102104534B (en) | 2014-07-02 |
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| CN200910261317.XA Expired - Fee Related CN102104534B (en) | 2009-12-17 | 2009-12-17 | Method and system for protecting multicast service |
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| CN (1) | CN102104534B (en) |
| WO (1) | WO2010148717A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023665A (en) * | 2011-09-23 | 2013-04-03 | 华为技术有限公司 | Multicast service protection method, network device and system |
| CN103297259A (en) * | 2012-02-29 | 2013-09-11 | 中兴通讯股份有限公司 | Method and device for protecting point-to-multipoint multicast service |
| CN108769842A (en) * | 2018-05-17 | 2018-11-06 | 北京邮电大学 | Multicast service protects construction method and device |
| CN109309928A (en) * | 2017-07-26 | 2019-02-05 | 华为技术有限公司 | D2D chain circuit detecting method, relevant apparatus and system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7627243B2 (en) * | 2004-02-17 | 2009-12-01 | Dynamic Method Enterprises Limited | Methods and apparatuses for handling multiple failures in an optical network |
| US7697455B2 (en) * | 2004-02-17 | 2010-04-13 | Dynamic Method Enterprises Limited | Multiple redundancy schemes in an optical network |
| JP4610621B2 (en) * | 2006-01-25 | 2011-01-12 | 株式会社日立製作所 | Network system |
| CN101192883A (en) * | 2006-11-21 | 2008-06-04 | 华为技术有限公司 | Multicast protection method in WDM optical network |
| CN101483491B (en) * | 2008-01-11 | 2013-01-02 | 华为技术有限公司 | Shared guard ring, multicast source route protection method and node thereof |
-
2009
- 2009-12-17 CN CN200910261317.XA patent/CN102104534B/en not_active Expired - Fee Related
-
2010
- 2010-04-13 WO PCT/CN2010/071739 patent/WO2010148717A1/en active Application Filing
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023665A (en) * | 2011-09-23 | 2013-04-03 | 华为技术有限公司 | Multicast service protection method, network device and system |
| CN103023665B (en) * | 2011-09-23 | 2015-12-16 | 华为技术有限公司 | A kind of method of multi-cast service protection, the network equipment and system |
| CN103297259A (en) * | 2012-02-29 | 2013-09-11 | 中兴通讯股份有限公司 | Method and device for protecting point-to-multipoint multicast service |
| CN109309928A (en) * | 2017-07-26 | 2019-02-05 | 华为技术有限公司 | D2D chain circuit detecting method, relevant apparatus and system |
| CN109309928B (en) * | 2017-07-26 | 2021-01-29 | 华为技术有限公司 | D2D link detection method, related device and system |
| CN108769842A (en) * | 2018-05-17 | 2018-11-06 | 北京邮电大学 | Multicast service protects construction method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102104534B (en) | 2014-07-02 |
| WO2010148717A1 (en) | 2010-12-29 |
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