WO2008040194A1 - Procédé et système pour la protection d'un arbre de multidiffusion - Google Patents

Procédé et système pour la protection d'un arbre de multidiffusion Download PDF

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Publication number
WO2008040194A1
WO2008040194A1 PCT/CN2007/070596 CN2007070596W WO2008040194A1 WO 2008040194 A1 WO2008040194 A1 WO 2008040194A1 CN 2007070596 W CN2007070596 W CN 2007070596W WO 2008040194 A1 WO2008040194 A1 WO 2008040194A1
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WIPO (PCT)
Prior art keywords
tree
node
protection
leaf
working
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PCT/CN2007/070596
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English (en)
Chinese (zh)
Inventor
Zheng Huang
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008040194A1 publication Critical patent/WO2008040194A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection

Definitions

  • the present invention relates to the field of communication information transmission, and specifically relates to a method and system for protecting a multicast tree.
  • the communication modes in the current network include multicast.
  • Multicast refers to the "one-to-one" communication mode between hosts, that is, hosts joining the same group can receive all the data in this group.
  • the switches and routers in the network are only available to those in need. Copy and forward data.
  • the multicast tree protection structure refers to a tree-to-tree protection structure consisting of a working tree and a protection tree.
  • the working tree and the protection tree have a common root node and leaf nodes.
  • the multicast tree protection structure includes multiple forms such as 1+1, 1:1, and dual-selection.
  • [8] 1+1 protection A protection mechanism that data streams are sent on both the protection path and the working path.
  • the path aggregation LSR Label Switch Router
  • 1:1 protection A protection mechanism in which a data stream is sent only on a working or protection path. The path is switched by the LSR to complete the switching action on the working path and the protection path.
  • the existing multicast technology does not have an automatic switching mechanism. Although the working tree and the protection tree are included in the multicast tree protection structure, only the affected leaf nodes or all leaf nodes can be manually switched after the working tree fails. To the protection tree, complete multicast protection, which is not conducive to administrator management, and affects the application and development of multicast technology.
  • a multicast tree protection method and system provided by an embodiment of the present invention implement automatic switching of a multicast tree.
  • a multicast tree protection method comprising the following steps:
  • the embodiment of the present invention further provides a method for protecting a multicast tree, where the method includes:
  • the root node is bridged between the working tree and the protection tree.
  • the leaf node receives data from the working tree. After the leaf node affected by the working tree fault detects the working tree fault, the leaf node affected by the working tree fault Switch directly to the protection tree.
  • the embodiment of the present invention further provides a method for protecting a multicast tree, where the method includes:
  • the leaf node is connected to the working tree and the protection tree, and the leaf node affected by the working tree fault detects the working tree failure and sends a switching request to the root node;
  • the root node After receiving the switching request, the root node switches to the protection tree.
  • the embodiment of the present invention further provides a protection system for a multicast tree, where the system includes a leaf node and a root node.
  • the leaf node includes:
  • the faulty leaf node switching request module is configured to switch the leaf node where the leaf node is located to the protection tree after detecting the fault on the working tree, and send a switching request to the root node;
  • the root node includes:
  • the root node receiving execution module is configured to bridge the root node of the leaf node to the working tree and the protection tree after receiving the switching request sent by the leaf node to the root node.
  • the embodiment of the present invention further provides a protection system for a multicast tree, where the system includes a leaf node and a root node.
  • the leaf node includes:
  • the faulty leaf node switching request module is configured to detect, when the root node is bridged on the working tree and the protection tree, and the leaf node where the leaf node is located receives data from the working tree, After the fault on the working tree, directly switch the leaf node where it is located to the protection tree and send a switching request to the root node.
  • the root node includes:
  • a root node receiving module configured to receive a switching request sent by the leaf node to the root node
  • a root node requesting module configured to: after receiving the switching request, the root node receiving module sends a switching request to all leaf nodes in the multicast tree, requesting all leaf nodes to switch to the protection tree;
  • the leaf node further includes:
  • the leaf node receives the switching module, after receiving the switching request sent by the root node after the leaf node where the leaf node is located , in the case where the leaf node where it is connected is connected to the working tree, the leaf node in which it is located is switched to the protection tree
  • An embodiment of the present invention further provides a protection system for a multicast tree, where the system includes a leaf node and a root node, and the leaf node includes:
  • the faulty leaf node switching module is configured to detect the work of the leaf node where the leaf node is located when the root node is bridged on the working tree and the protection tree, and the leaf node where the leaf node is located receives data from the working tree. After the fault on the tree, directly switch the leaf node it is in to the protection tree.
  • the embodiment of the present invention further provides a protection system for a multicast tree, where the system includes a leaf node and a root node.
  • the leaf nodes that are connected to the working tree and the protection tree include:
  • the faulty leaf node requesting module is configured to send a switching request to the root node after detecting a fault on the working tree at the leaf node where the leaf node is located;
  • the root node includes:
  • the root node receives the switching module, and is configured to receive the switching request sent by the leaf node to the root node, and then switch the root node to the protection tree.
  • the multicast tree protection method and system according to the embodiment of the present invention simply and effectively utilize the APS protocol to synchronize the switching operations of the root node and the leaf node, thereby preventing the occurrence of misconnection, and finally realizing the automatic switching of the multicast tree protection structure.
  • FIG. 1 is a schematic diagram of a multicast tree protection method and a multicast tree protection structure in a system according to an embodiment of the present invention
  • FIG. 2 is a method and system for protecting a multicast tree according to an embodiment of the present invention
  • Multicast tree protection structure FIG. 2 is a flowchart 1 of a method for protecting a multicast tree according to an embodiment of the present invention; and a method for protecting a multicast tree in a system;
  • FIG. 4 is a third embodiment of a method for protecting a multicast tree according to an embodiment of the present invention.
  • FIG. 6 is a fourth embodiment of a multicast tree protection method and a multicast tree protection structure in a system according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a multicast tree protection method and a system for protecting a multicast tree according to an embodiment of the present invention
  • FIG. 8 is a method and system for protecting a multicast tree according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of a multicast tree protection method and a multicast tree protection structure in a system according to an embodiment of the present invention
  • FIG. 10 is a method and system for protecting a multicast tree according to an embodiment of the present invention. Method flow chart of multicast tree protection structure;
  • FIG. 11 is a multicast tree protection method and a multicast tree protection structure in a system according to an embodiment of the present invention
  • FIG. 12 is a method and system for protecting a multicast tree according to an embodiment of the present invention
  • FIG. 8 is a flowchart of a method for protecting a multicast tree and a method for protecting a multicast tree in a system according to an embodiment of the present invention
  • FIG. 14 is a schematic diagram 1 of a multicast tree protection structure system in a method for protecting a multicast tree according to an embodiment of the present invention
  • 15 is a second schematic diagram of a multicast tree protection structure system in a multicast tree protection method and system according to an embodiment of the present invention.
  • 16 is a schematic diagram 3 of a multicast tree protection structure system in a method for protecting a multicast tree according to an embodiment of the present invention
  • FIG. 17 is a schematic diagram showing a structure of a multicast tree protection system in a multicast tree protection system according to an embodiment of the present invention.
  • FIG. 18 is a schematic diagram 5 of a structure of a multicast tree protection structure and a system for protecting a multicast tree according to an embodiment of the present invention.
  • a multicast tree protection method and system according to an embodiment of the present invention utilizes APS (Auto Protection)
  • Figure 1 shows a 1+1 multicast tree protection structure in which a working tree exists (Working
  • a protection tree (Protection Tree) , the root node is permanently bridged between the working tree and the protection tree. Under normal conditions, the data transport stream flows through the working tree and the protection tree, and all leaf nodes (Leaf) use the Selective selector to receive data only from the working tree.
  • Step 101 Leaf node C is affected when a fault occurs on the work tree.
  • Step 102 After detecting the fault, leaf node C operates the selective selector to switch to the protection tree.
  • Step 103 Leaf node C sends APS signaling to the root node, requesting that the root node switch to the protection tree.
  • the APS signaling may be sent through a specific APS channel or a return path.
  • Step 104 After the root node receives the APS signaling, there is no switching action.
  • the root node is the same as the permanent bridge between the working tree and the protection tree, and thus there is no need to perform the switching action.
  • Step 105 The root node sends APS signaling to all leaf nodes, requesting all leaf nodes to perform switching.
  • the APS signaling may be sent through two trees, or may be sent through a specific APS channel or a return path.
  • This leaf node C will receive APS signaling on the protection tree, and the other leaf nodes will receive APS signaling on the working tree.
  • leaf node C Since leaf node C has been switched to the working tree, leaf node C no longer performs the switching operation.
  • Step 106 After receiving the APS signaling, the other leaf nodes except the leaf node C operate the selective selector, and all of them are switched to the protection tree.
  • Figure 1 shows a 1+1 multicast tree protection structure in which there is a working tree, a protection tree, and the root node is permanently bridged between the working tree and the protection tree.
  • the data transport stream flows through both the worker tree and the protection tree, and all leaf nodes use the selective selector to receive data only from the working tree.
  • the difference from Embodiment 1 includes: After the protection switching, only the affected leaf nodes, such as leaf node C, work on the protection tree, and other unaffected leaf nodes still work on the working tree.
  • Step 201 When a fault occurs on the working tree, leaf node C is affected.
  • Step 202 After detecting the fault, leaf node C operates the selective selector to switch to the protection tree.
  • Figure 6 shows a 1:1 multicast tree protection structure in which there is a working tree, a protection tree, and the root node passes through the broadcast bridge (Broadcast)
  • the bridge is connected to the working tree.
  • the leaf nodes are connected to the working tree through selective selectors. In the normal transmission state, all leaf nodes are connected to the working tree, and the data transport stream only flows through the working tree.
  • Step 301 Leaf node C is affected when a fault occurs in the working tree.
  • Step 302 After detecting the fault, leaf node C operates the selective selector to switch to the protection tree.
  • Leaf node C is switched and connected to the protection tree, no longer connected to the working tree.
  • Step 303 Leaf node C sends APS signaling to the root node, requesting that the root node switch to the protection tree.
  • the APS signaling may be sent through a specific APS channel or a return path.
  • Step 304 After receiving the APS signaling, the root node operates the broadcast bridge to bridge the root node in the working tree and the protection tree.
  • Step 401 When a fault occurs in the working tree, leaf node C is affected.
  • Step 402 After detecting the fault, the leaf node C operates the selective selector to switch to the protection tree.
  • Leaf node C is switched to connect to the protection tree and is no longer connected to the working tree.
  • Step 403 The leaf node C sends APS signaling to the root node, requesting the root node to switch to the protection tree.
  • the APS signaling may be sent through a specific APS channel or a return path.
  • Step 404 After receiving the APS signaling, the root node operates the broadcast bridge, so that the root node is bridged between the working tree and the protection tree.
  • Step 405 The root node sends APS signaling to all leaf nodes in the multicast tree, requesting all leaf nodes to perform switching.
  • the APS signaling may be sent through two trees, or may be sent through a specific APS channel or a return path.
  • This leaf node C will receive APS signaling on the protection tree, and the other leaf nodes will receive APS protocol signaling on the working tree.
  • leaf node C Since leaf node C has been reversed to the protection tree, leaf node C no longer performs the switching operation.
  • Step 406 After receiving the APS signaling, the other leaf nodes except the leaf node C operate the selective selector and all switch to the protection tree.
  • Figure 11 shows a multicast tree protection structure for selective transmission and reception, there is a working tree and a protection tree, and all leaf nodes pass the aggregation selector (merging
  • the peer is connected to the working tree and the protection tree, and the peer receives data from the two trees, and the root node can utilize the selective bridge (Selective
  • Bridge Bridges on a working tree or a protection tree. Under normal working conditions, the root node is bridged in the working tree and data is only transmitted on the working tree.
  • Step 501 Leaf node C is affected when a fault occurs in the working tree.
  • Step 502 After detecting the fault, the leaf node C sends APS signaling to the root node, and requests the root node to switch to the protection tree.
  • Step 503 After receiving the APS signaling, the root node operates the selective bridge so that the root node is only bridged in the protection tree.
  • the root node only sends multicast data on the protection tree.
  • the bridge is connected to the working tree.
  • the leaf nodes are connected to the working tree through selective selectors. In the normal transmission state, all leaf nodes are connected to the working tree, and the data transport stream only flows through the working tree.
  • the embodiment of the present invention provides a protection system for a multicast tree, including a leaf node and a root node, where the leaf node includes a faulty leaf node switching request module, and the root node includes a root.
  • the node receives the execution module;
  • the faulty leaf node switching request module is configured to detect a fault on the working tree, convert the leaf node in which it is located to the protection tree, and send a switching request to the root node;
  • the root node receiving execution module is configured to receive a switching request sent by the leaf node to the root node, and connect the root node of the root node to the working tree and the protection tree.
  • the faulty leaf node switching request module can be implemented by a selective selector, and the root node receiving and executing module can be implemented by using a broadcast bridge.
  • Bridge is connected to the working tree.
  • the leaf nodes are connected to the working tree through selective selectors. In the normal transmission state, all leaf nodes are connected to the working tree, and the data transmission stream only flows through the working tree. when A failure occurs in the work tree. Assuming that leaf node C is affected, all leaf nodes work on the protection tree.
  • the embodiment of the present invention provides a protection system for a multicast tree, including a leaf node and a root node, where the leaf node includes a faulty leaf node switching request module, and the root node includes a root.
  • the node receives the execution module;
  • the fault leaf node switching request module is configured to detect a fault on the working tree, convert the leaf node where the fault is located to the protection tree, and send a switching request to the root node;
  • the root node receiving execution module is configured to receive a switching request sent by the leaf node to the root node, and connect the root node of the root node to the working tree and the protection tree.
  • the root node further includes a root node requesting module, and the leaf node further includes a leaf node receiving switching module;
  • the root node requesting module is configured to send a switching request to all leaf nodes in the multicast tree after receiving the switching request sent by the faulty leaf node switching requesting module, requesting that all the leaf nodes switch to the protection tree;
  • the leaf node receiving switching module is configured to switch the leaf node where the leaf node is located to the protection tree after the leaf node where the leaf node is located is connected to the working tree after receiving the switching request sent by the root node.
  • the root node receiving execution module can be implemented by a broadcast bridge.
  • the root node is permanently bridged between the working tree and the protection tree.
  • the data transport stream flows through the working tree and the protection tree, and all leaf nodes use the selective selector to receive data only from the working tree.
  • all leaf nodes will work on the protection tree.
  • the embodiment of the present invention provides a protection system for a multicast tree, including a leaf node and a root node, where the leaf node includes a faulty leaf node switching request module and a leaf node receiving switching module.
  • the root node includes a root node receiving module and a root node requesting module;
  • the faulty leaf node switching request module is configured to detect a fault on the working tree in a state in which the root node is bridged to the working tree and the protection tree, and the leaf node where the root node receives the data from the working tree. Switching the leaf node where it is located to the protection tree; and sending a switching request to the root node; [140] The root node receiving module is configured to receive a switching request sent by the leaf node to the root node, and does not perform a switching action; [141] after the root node requesting module receives the switching request sent by the faulty leaf node switching request module, The control root node sends a switching request to all leaf nodes, requesting that all leaf nodes be switched to the protection tree;
  • the leaf node receiving switching module is configured to switch the leaf node where the leaf node is located to the protection tree after the leaf node where the leaf node is located is connected to the working tree after receiving the switching request sent by the root node.
  • the root node is permanently bridged between the working tree and the protection tree.
  • the data transport stream flows through the working tree and the protection tree, and all leaf nodes use the selective selector to receive data only from the working tree.
  • the affected leaf node C directly operates the selective selector to switch to the protection tree, and other leaf nodes that are not affected by the fault still work in the working tree.
  • the embodiment of the present invention provides a protection system for a multicast tree, including a leaf node and a root node, where the leaf node includes a faulty leaf node switching module.
  • the faulty leaf node switching module is used to permanently bridge the root node in the working tree and the protection tree, and the leaf node where the leaf node is located receives the data from the working tree, and detects the fault on the working tree. Directly switch the leaf node it is on to the protection tree.
  • the faulty leaf node switching module can be implemented by a selective selector.
  • the multicast tree protection structure of the dual-receipt there is a working tree and a protection tree. All the leaf nodes are connected to the working tree and the protection tree through the aggregation selector, and the two trees are on the same tree. The data is received, and the root node is bridged between the working tree and the protection tree using a selective bridge. Under normal working conditions, the root node is bridged in the working tree and data is only transmitted on the working tree. All leaf nodes receive data from the working tree and the protection tree, so the leaf nodes do not need to perform the switching action. When a fault occurs on the working tree, assuming that leaf node C is affected, the root node is bridged to the protection tree and only uploads data in the protection tree.
  • the embodiment of the present invention provides a protection system for a multicast tree.
  • the leaf node includes a faulty leaf node requesting module
  • the root node includes a root node receiving a switching module
  • the faulty leaf node requesting module is configured to send a switching request to the root node after the leaf node where the leaf node is located detects the fault on the working tree;
  • the root node receiving switching module is configured to receive the switching request sent by the leaf node to the root node, and then switch the root node to the protection tree.
  • the root node receiving switching module can be implemented by a selective bridge, and the faulty leaf node requesting module can be implemented by a polymerizable selector.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)

Abstract

L'invention concerne un procédé et un système permettant de protéger plusieurs arbres de multidiffusion dans un champ de radiodiffusion d'informations de communication. Selon un procédé de protection d'un arbre multidiffusion, après détection d'une défaillance de l'arbre opérationnel par un noeud feuille concerné par cette défaillance, ledit noeud effectue une commutation vers l'arbre de protection et transmet une demande de commutation au noeud racine, lorsque celui-ci a reçu ladite demande, et le noeud feuille fait le pont entre l'arbre opérationnel et l'arbre de protection. Selon un autre procédé de protection de l'arbre de multidiffusion, un noeud racine fait simultanément le pont entre l'arbre opérationnel et l'arbre de protection, un noeud feuille reçoit des données provenant d'un arbre opérationnel après détection d'une défaillance de l'arbre opérationnel par un noeud feuille concerné par cette défaillance, ledit noeud feuille effectuant une commutation vers l'arbre de protection. Selon un autre procédé de protection de l'arbre de multidiffusion, un noeud feuille fait simultanément le pont entre l'arbre opérationnel et l'arbre de protection, un noeud feuille concerné par la défaillance de l'arbre opérationnel détecte cette défaillance et transmet une demande de commutation au noeud racine. Lorsque ce dernier a reçu la demande de commutation, il effectue une commutation vers l'arbre de protection.
PCT/CN2007/070596 2006-09-01 2007-08-30 Procédé et système pour la protection d'un arbre de multidiffusion WO2008040194A1 (fr)

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CN200610126068 2006-09-01
CN200610126068.X 2006-09-01
CN200610152293.0A CN101136848A (zh) 2006-09-01 2006-09-30 一种组播树的保护方法及系统
CN200610152293.0 2006-09-30

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CN101222350B (zh) * 2007-01-12 2011-08-24 华为技术有限公司 保护倒换决策方法和保护倒换决策系统
WO2010000172A1 (fr) * 2008-06-30 2010-01-07 华为技术有限公司 Procédé, système, dispositif d'extrémité de réception et dispositif source de multidiffusion pour protection de multidiffusion
CN101674222B (zh) * 2008-09-10 2013-01-30 华为技术有限公司 组播的切换方法及系统
CN101883007B (zh) * 2010-06-24 2015-01-28 中兴通讯股份有限公司 Ptn网络etree组网下实现业务保护的方法和装置
CN102316024A (zh) * 2011-07-13 2012-01-11 中国联合网络通信集团有限公司 分布式智能光网络中组播恢复方法和系统及处理节点
CN102395131B (zh) * 2011-10-10 2014-06-04 西安交通大学 一种mesh 网非全度完全非相关双树遍历保护方法

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JP2004080532A (ja) * 2002-08-20 2004-03-11 Nippon Telegr & Teleph Corp <Ntt> マルチキャストプロテクション方法及び装置及びマルチキャストプロテクションプログラム及びマルチキャストプロテクションプログラムを格納した記憶媒体

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