WO2006002596A1 - Procede pour la mise en oeuvre d'une multidiffusion en fonction d'une structure de transmission multiservices - Google Patents
Procede pour la mise en oeuvre d'une multidiffusion en fonction d'une structure de transmission multiservices Download PDFInfo
- Publication number
- WO2006002596A1 WO2006002596A1 PCT/CN2005/000956 CN2005000956W WO2006002596A1 WO 2006002596 A1 WO2006002596 A1 WO 2006002596A1 CN 2005000956 W CN2005000956 W CN 2005000956W WO 2006002596 A1 WO2006002596 A1 WO 2006002596A1
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- WIPO (PCT)
- Prior art keywords
- multicast
- network node
- data packet
- multicast tree
- label
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Classifications
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- 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
- H04L45/302—Route determination based on requested QoS
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- 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
- H04L12/1854—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with non-centralised forwarding system, e.g. chaincast
-
- 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
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- 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
- H04L45/16—Multipoint routing
-
- 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
- H04L45/48—Routing tree calculation
-
- 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
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
Definitions
- Multicast service based on multi-service transmission platform
- the present invention relates to the field of multicast service technologies, and in particular, to a multicast implementation method based on a multi-service transmission platform. Background of the invention
- Multicast services are one of the most promising businesses in the future.
- MSTP Multi-Service Transport Platform
- Method 1 The traditional C/S (client/server) model is used to implement the multicast service. The specific implementation method is shown in Figure 1.
- the video server acts as a media stream server, which initiates the media stream playback process.
- the video server establishes a connection with the video server through an IP address of the video server, such as a TCP connection, and the video stream server maintains a client list, and requests the media in a round-robin manner according to the client list.
- Each client of the stream sends a media stream, such as client in, client B, and client C request the media stream, and the video stream server transmits the media stream to the MSTP device 1 in three times, and passes through the MSTP device 3 respectively.
- MSTP device 2 MSTP device 4 transfers the media stream to client in, client B and client (.
- the MSTP device does not actively perform the multicast function of the multicast data packet.
- the multicast service is completely implemented by the video server. This requires a high video server. Configuration; Moreover, the video server needs to maintain the information of each client, wasting the resources of the server; because the media stream is different from the data transmitted in the traditional narrowband service, it often needs a high transmission bandwidth, so when the number of clients is large The video server will not be able to do the same; at the same time, the same media stream data may be repeatedly transmitted on the network multiple times, which seriously wastes network resources, and on some links with lower bandwidth, it is also likely to cause serious communication bottlenecks.
- Method 2 Implement a multicast service by using a Layer 2 switched multicast model.
- the specific implementation method is as shown in Figure 2:
- the video server only needs to send a piece of media stream data to the MSTP device 1, and the MSTP device 1 copies the media stream to other multicast ports according to the multicast MAC address in the media stream data transmitted by the video server.
- the MSTP device 3 can also copy the media stream data transmitted by the MSTP device 1 to the MSTP device 4 and the client.
- the multicast mask table can be statically configured. Or maintain it through IGMP SNOOPING (Internet Group Management Protocol Listening) technology.
- IGMP SNOOPING Internet Group Management Protocol Listening
- the object of the present invention is to provide a multicast implementation method based on a multi-service transmission platform to simplify the implementation of multicast, improve the forwarding efficiency of multicast data packets, and eliminate the transmission bottleneck of multicast services.
- a multicast implementation method based on a multi-service transmission platform including
- the label switching path multicast tree branch of each node between the source network node and the plurality of destination network nodes to each downstream destination network node adjacent to the node is configured.
- the configured label switching path multicast tree branch forms a label switching path multicast tree from the source network node to each destination network node; the label switching path multicast tree corresponds to the multicast data packet;
- the network node replicates the received multicast data packet according to the label switching path multicast tree, and sequentially transmits the multicast data packet to the downstream destination network node according to the label switching path multicast tree until reaching the client.
- the present invention replicates multicast data packets by a video server or a Layer 2 switching device in the prior art by establishing a label switching path multicast tree.
- the network node simplifies the implementation of the multicast service when the network node based on the multi-service transmission platform performs multi-party forwarding of the multicast data packet, eliminates the transmission bottleneck of the multicast service, and improves the forwarding efficiency.
- a multicast label switching path information table is established, and the network node uses the unicast label switching path to implement the flow classification table, the forwarding information table, and the incoming data packet transmission process.
- the label action processing table can increase the multicast label switching path information and the index information of the multicast label switching path information table in the corresponding table, so that the network node of the network provider edge attribute and the network node of the network provider trunk attribute can
- the data packet received by the user is conveniently transmitted through the corresponding label switching path multicast tree branch or the unicast label switching path; the present invention uses the label switching path and supports multi-protocol label switching.
- the invention can realize service protection function, traffic management, traffic engineering, and provide good service quality assurance, and is suitable for large-scale networking requirements.
- FIG. 1 is a schematic diagram of a prior art MSTP-based client/server model for implementing multicast
- FIG. 2 is a schematic diagram of a prior art MSTP-based Layer 2 switched multicast model for implementing multicast
- FIG. 3 is a schematic diagram of an MSTP-based LSP multicast tree according to the present invention.
- FIG. 4 is a schematic diagram of a data structure of an MSTP-based multicast LSP according to the present invention.
- FIG. 5 is a flow chart of implementing multicast based on MSTP according to the present invention. Mode for carrying out the invention
- the core of the present invention is: establishing a multicast data packet from a source network node based on the multi-service transmission platform to a label switching path multicast tree of the plurality of destination network nodes, and the source network node multicasts the data according to the label switching path multicast tree.
- the message is transmitted to each destination network node.
- a unicast LSP Label Switched Path
- LSP Label Switched Path
- the present invention uses LSP for multicast datagrams.
- an LSP multicast tree from the source network node to the plurality of destination network nodes is established according to the multicast data packet from each destination network node to which the source network node needs to transmit.
- the LSP in the LSP multicast tree between the local node and the downstream node is called an LSP multicast tree branch, and each LSP multicast tree branch can determine an LSP from the local node to one downstream node.
- the downstream node of the node is at least one, that is, from the node to the downstream node.
- the LSP multicast tree in the present invention is composed of LSP multicast tree branches.
- the network node in the present invention is an MSTP-based network node, which includes an MSTP-based network provider edge node, an MSTP-based network provider backbone node, and the like.
- MSTP-based network provider edge nodes mainly include: MSTP-based network provider edge routers, MSTP-based access layer devices, etc.
- MSTP-based network provider backbone nodes mainly include: MSTP-based network provider backbone routers, based on MSTP aggregation layer devices, etc.
- the LSP multicast tree established by the present invention will be described below by taking FIG. 3 as an example.
- PE1, PE2, PE3, PE4, PE5, PI, and P2 are all MSTP-based network nodes, where PE1, PE2, PE3, PE4, and PE5 are PE (Network Provider Edge) attributes of the network node, P1. And P2 is the network node of the P (network provider backbone) attribute.
- a multicast data packet needs to be transmitted from the source network node PE1 to the client connected to the destination network nodes PE2, PE3, PE4, and PE5.
- the LSP multicast tree established by the present invention is as shown in FIG. 3, and the specific establishment method is as follows:
- the LSP multicast tree branch between the clients connected to it is configured on the PE2, PE3, PE4, and PE5.
- the client can be regarded as a network node. All of the above branches constitute the message from the source network node A label switched path multicast tree to multiple destination network nodes.
- the transmission process of the multicast data packet from the source network node PE1 to the destination network node PE2, PE3, PE4, and PE5 through the LSP multicast tree is:
- Destination nodes PE2, PE3, and PE4 And the PE5 separately copies and transmits the received multicast data packet to the client connected to it.
- the label switching path multicast tree is not unique, and may have other forms, and the label switching path multicast tree may be flexibly configured according to the networking condition of the multicast network, and may also be in the process of transmitting multicast data.
- the downstream node of the current node is determined by the route discovery protocol, and the label switched path multicast tree is dynamically configured.
- the MSTP-based network node plays multiple copies and multi-party transmission, thereby reducing the burden on the video server and saving the chain.
- Road bandwidth eliminates communication bottlenecks.
- the multicast source is different, or the multicast group of the same multicast source data packet is different.
- the network can be transmitted through different multicast trees. For example, for the VLAN 1 multicast data packet, the destination network node. For PE2 and PE3, for the VLAN 2 multicast data packet, the destination network node is PE2, PE3, and PE4, so that different multicast trees can be set even on the same network node P2, and each multicast data packet is corresponding to it.
- the multicast tree is copied and sent. Therefore, the method for implementing the multicast data packet transmission through the LSP multicast tree can also be implemented by setting the correspondence between the transmission information of the multicast data packet and the LSP multicast tree.
- the network node Since the multicast data packet must have some transmission-related information during the transmission process, for example, the network node receives the data packet port information, the data packet VLAN identifier, and the data packet multi-protocol label switching (MPLS). Tag information, etc., by establishing each multicast data
- the transmission information of the packet corresponds to the LSP multicast tree.
- the network node can determine the corresponding multicast tree according to the transmission information, and determine the network node and multiple downstream channels according to the multicast tree.
- An LSP multicast tree branch between the destination network nodes, so that the network node can copy multiple copies according to the number of corresponding LSP multicast tree branches, and transmit the multicast data packets to the corresponding multiple LSP multicast tree branches respectively.
- Each branch information in the LSP multicast tree can be stored in the form of a table.
- the table for storing the branch information of the LSP multicast tree can be called MLT (Multicast LSP Information Table).
- MLTs can be stored separately in each network node.
- the content in the MLT of each network node is the LSP multicast tree branch information associated with the network node.
- the correspondence between the information and the LSP multicast tree can be implemented by the correspondence between the transmission information of the multicast data packet and the index information of the multicast LSP information table.
- the current MSTP-based network node can transmit data packets through the unicast LSP.
- the multicast data packets can be transmitted through the branches of the LSP multicast tree.
- the non-multicast data packet can be transmitted through the unicast LSP.
- the present invention can also set the correspondence between the transmission information of the multicast data packet and the multicast LSP indication information.
- the multicast LSP indication information is used to determine whether the data packet received by the node needs to be transmitted through the unicast LSP or the branch of the LSP multicast tree. If the multicast LSP indication information is "1", the datagram is indicated. The LSP needs to be transmitted through the LSP of the LSP multicast tree. If the multicast LSP indicates that the information is "0", the data packet needs to be transmitted through the unicast LSP.
- a network node generally uses a flow classification table, a FIB (Forwarding Information Base), in the process of transmitting a data packet by using a unicast LSP.
- the existing stream classification table, FIB, INSEGMENT ⁇ OUTSEGMENT, and the like are fully utilized.
- the multicast data packet received by the network node of the P attribute is MPLS label information
- the multicast data packet received by the network node of the PE attribute is without MPLS label information, and different attributes.
- the network node processes the received multicast data packet differently. Therefore, in the network node of the PE attribute, the index information of the multicast LSP information table and the multicast LSP indication information are stored in the FIB; In the network node, it is stored in the INSEGMENT table.
- the network node of the PE attribute when the network node of the PE attribute receives the data packet, the network node acquires and receives the data packet according to the transmission information of the data packet, for example, the port of the network node receiving the data packet and/or the VLAN identifier of the data packet.
- a traffic classification table corresponding to the data packet port Because there are many entries in the FIB, the FIB index ( INDEX ) is obtained from the entries of the flow classification table for the convenience of searching. With FIB INDEX, the corresponding entry can be determined in the FIB.
- the entry in the FIB contains the multicast LSP indication information. According to the multicast LSP indication information, it can be determined whether the data packet needs to be transmitted through the unicast LSP or the branch of the tLSP multicast tree.
- the data packet is processed according to the contents of the OUTSEGMENT table pointed to by the outbound label index (LSP TOKEN) in the FIB.
- LSP TOKEN outbound label index
- MLT INDEX determines the specific entries in the MLT and MLT, according to the contents of the OUTSEGMENT table pointed to by multiple LSP TOKEN in the MLT entry, perform multiple copies of the multicast data and transfer processing .
- the network node of the P attribute When the network node of the P attribute receives the data packet, the network node obtains the INSEGMENT table corresponding to the port of the received data packet according to the transmission information of the multicast data packet, for example, the MPLS label information, and obtains the multicast LSP indication from the table.
- the information may be determined according to the multicast LSP indication information whether the data packet needs to be transmitted through the unicast LSP or through the branch of the LSP multicast tree.
- the data packet is transmitted according to the contents of the OUTSEGMENT table pointed to by the LSP TOKEN in the INSEGMENT.
- the MLT INDEX in the INSEGMENT is obtained, and the specific entry in the MLT and the MLT can be determined according to the MLT INDEX, according to multiple LSP TOKENs in the MLT entry.
- the contents of the OUTSEGMENT table are used to copy and process multicast data packets.
- step 500 the network node receives the data message.
- Step 510 Determine, according to the network port configuration table, whether the port that the network node receives the data packet belongs to the P attribute or the PE attribute. If the port belongs to the PE attribute, go to step 520, according to the transmission information of the received data packet, such as the network.
- the node receives the data packet and/or the VLAN ID of the data packet, and determines its corresponding traffic classification table.
- Step 530 Perform traffic classification on the data packet according to the agreed rules according to the related entries in the flow classification table, and perform QoS processing, such as rate limiting, priority classification processing, and the like on the ⁇ 3 ⁇ 4 text.
- QoS processing such as rate limiting, priority classification processing, and the like
- Step 540 Obtain FIB INDEX information in the flow classification table, and according to the index information, Determine its corresponding FIB.
- Step 550 Determine, according to the indication information of the multicast LSP in the FEB, whether the data packet needs to be transmitted through the LSP multicast tree branch, or whether the data packet needs to be transmitted through the unicast LSP. If the branch of the LSP multicast tree needs to be transmitted, go to step 560 to obtain the MLT INDEX in the FIB, and find the corresponding outbound label index in the multicast LSP information table according to the MLT INDEX.
- Step 570 Copy the corresponding number of multicast data packets according to all LSP TOKENs in the multicast LSP information table.
- Step 580 Find corresponding content in the OUTSEGMENT table according to all LSP TOKENs in the multicast LSP information table.
- Step 590 Encapsulate the data packet according to the content in the OUTSEGMENT table, and then schedule the transmission through the port or the 3 ⁇ 4 LSP flow.
- step 550 if the data message needs to be transmitted through the unicast LSP, then in step 580, the content corresponding to the OUTSEGMENT table is searched according to the LSP TOKEN in the FIB. To step 590, the data packet is encapsulated according to the content corresponding to the OUTSEGMENT table, and then scheduled to be transmitted through the port or the LSP stream.
- step 510 if the port that the network node receives the data packet belongs to the P attribute, the multicast data packet carries the MPLS label information, and in step 511, the MPLS label information of the data packet is obtained, and the label is determined according to the label. INSEGMENT table.
- step 550 Go to step 550, and determine whether the data packet needs to be transmitted through each branch of the LSP multicast tree according to the multicast LSP indication information in the INSEGMENT table, or needs to be transmitted through the unicast LSP. If the data packet is to be transmitted through the branches of the LSP multicast tree, go to step 560, obtain the MLT INDEX in the INSEGMENT table, and search for the corresponding outbound label index in the multicast LSP information table according to the MLT INDEX, and use the above description.
- the steps 570, 580, and 590 complete the process of copying and forwarding the multicast data message.
- step 550 if the data packet needs to be transmitted through the unicast LSP, to the step 580.
- the LSP multicast tree established between the MSTP-based network nodes in the present invention can be set in a static manner, such as by setting a configuration command, or dynamically set by a protocol, such as dynamically setting through a protocol related to MPLS. That is, the content in the MLT can be set statically or dynamically through a protocol.
- the mapping between the transmission information of the multicast data packet and the branches of the LSP multicast tree in the present invention can also be set in the static or dynamic manner, that is, the MLT INDEX and the multicast LSP indication information in the FIB and INSEGMENT tables can pass.
- the static mode setting can also be set dynamically in the protocol.
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP05759452A EP1722520A4 (en) | 2004-06-30 | 2005-06-30 | METHOD FOR MULTI-TRANSMITTING IMPLEMENTATION BASED ON MULTIPLE SERVICE OVER STRUCTURE STRUCTURE |
US11/566,940 US20070127477A1 (en) | 2004-06-30 | 2006-12-05 | Method for implementing multicast based on multi-service transport platform |
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Application Number | Priority Date | Filing Date | Title |
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CN200410060169.2 | 2004-06-30 | ||
CNB2004100601692A CN100542127C (zh) | 2004-06-30 | 2004-06-30 | 一种基于多业务传输平台的组播实现方法 |
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US11/566,940 Continuation US20070127477A1 (en) | 2004-06-30 | 2006-12-05 | Method for implementing multicast based on multi-service transport platform |
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WO2006002596A1 true WO2006002596A1 (fr) | 2006-01-12 |
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PCT/CN2005/000956 WO2006002596A1 (fr) | 2004-06-30 | 2005-06-30 | Procede pour la mise en oeuvre d'une multidiffusion en fonction d'une structure de transmission multiservices |
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US (1) | US20070127477A1 (zh) |
EP (1) | EP1722520A4 (zh) |
CN (1) | CN100542127C (zh) |
WO (1) | WO2006002596A1 (zh) |
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CN112188222A (zh) * | 2020-09-25 | 2021-01-05 | 吕庆新 | 信息采集处理设备及其应用、信息转制方法、计算机可读介质、信息采集处理方法 |
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- 2005-06-30 WO PCT/CN2005/000956 patent/WO2006002596A1/zh not_active Application Discontinuation
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CN101383754B (zh) * | 2007-09-06 | 2012-12-12 | 华为技术有限公司 | 一种业务传输方法及通讯系统以及相关设备 |
CN112188222A (zh) * | 2020-09-25 | 2021-01-05 | 吕庆新 | 信息采集处理设备及其应用、信息转制方法、计算机可读介质、信息采集处理方法 |
CN112860759A (zh) * | 2021-01-26 | 2021-05-28 | 周应凤 | 基于区块链安全认证的大数据挖掘方法及云认证服务系统 |
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CN100542127C (zh) | 2009-09-16 |
EP1722520A1 (en) | 2006-11-15 |
CN1716904A (zh) | 2006-01-04 |
EP1722520A4 (en) | 2007-04-25 |
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