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WO2014146395A1 - Procédé, appareil et système pour protéger un basculement de diffusion groupée - Google Patents

Procédé, appareil et système pour protéger un basculement de diffusion groupée Download PDF

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Publication number
WO2014146395A1
WO2014146395A1 PCT/CN2013/082009 CN2013082009W WO2014146395A1 WO 2014146395 A1 WO2014146395 A1 WO 2014146395A1 CN 2013082009 W CN2013082009 W CN 2013082009W WO 2014146395 A1 WO2014146395 A1 WO 2014146395A1
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WO
WIPO (PCT)
Prior art keywords
olt
multicast
onu
protocol data
control end
Prior art date
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Ceased
Application number
PCT/CN2013/082009
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English (en)
Chinese (zh)
Inventor
魏立强
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ZTE Corp
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ZTE Corp
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Filing date
Publication date
Application filed by ZTE Corp filed Critical ZTE Corp
Publication of WO2014146395A1 publication Critical patent/WO2014146395A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport

Definitions

  • the present invention relates to the field of optical networks, and in particular, to a method, apparatus, and system for protecting multicast switching.
  • BACKGROUND OF THE INVENTION XPON New Generation Fiber Access Technology
  • more and more applications are based on a specific group of applications, including multimedia conferencing, video on demand, and so on.
  • the previous unicast and broadcast technologies are used, they are not in line with the actual application, and they will greatly increase the data traffic of the network redundancy.
  • the best way is to divide the members of the application into a group according to the actual situation.
  • Multicast technology is a kind of network communication in which a single sender corresponds to multiple receivers.
  • the multicast technology by transmitting a single information stream to multiple receivers, it is possible to reduce the simultaneous listening or viewing of the same resources by multiple receivers. Network traffic under. In this way, efficient point-to-multipoint data transmission is realized, which can save a lot of network bandwidth and reduce network load, and can conveniently provide some new value-added services, including online live broadcast, network television, distance education, telemedicine and other information services.
  • Figure 1 shows the implementation of the multicast service and the implementation of the Type B protection networking across the OLT in the actual live network application.
  • the working port is a PON (Passive Optical Network) port 1 of the OLT (optical line terminal) 1, and the protection port is a PON port 2 on the OLT 2.
  • the two network elements OLT 1 and OLT 2 are completely independent of the multicast processing.
  • Figure 1 shows the STB of the ONU on-demand multicast, sends an IGMP multicast join request, and sends it to the NE OLT 1 through the ONU, ODN, etc.; after being processed by the multicast module, it is sent to the network side to order the multicast data.
  • the flow through the solid arrow, sends the multicast data stream to the OLT 1, and then forwards it to the PON port, notifies all ONUs, and forwards the ONU from the on-demand ONU to the STB, so that the multicast can be viewed normally.
  • the entire multicast data stream passes through the OLT 1.
  • the OLT 1 generates an abnormality, it is switched to the OLT 2 because the protection is configured.
  • the OLT 2 does not have the corresponding join packet to join, no corresponding multicast stream is sent to the ONU through the network element OLT 2. At this time, the multicast service is definitely interrupted.
  • the present invention provides a method, an apparatus, and a system for protecting a multicast switch.
  • the ONU sends the multicast protocol data to the standby OLT.
  • the multicast service can be performed when the primary OLT is abnormal. Switch to the alternate OLT quickly.
  • a method for protecting a multicast switch including:
  • the ONU sends the join packet to the IP network control end by the primary OLT; the ONU receives, by the primary OLT, the multicast protocol data that is responsive to the join packet from the IP network control end; the ONU sets the group The broadcast protocol data is sent to the standby OLT.
  • the method for protecting a multicast switch further includes: the IP network control end monitoring an active OLT working state; and when the active OLT working state is faulty, the IP network control end starts a standby OLT The PON port; the IP network control end sends a multicast data stream to the ONU according to the multicast protocol data through the PON port of the standby OLT.
  • the method for protecting multicast switching further includes: sending, by the ONU, the multicast data stream to a set top box.
  • the sending, by the ONU, the multicast protocol data to the backup OLT includes: the ONU extracting address information from the multicast protocol data, and sending the address information to the standby OLT, so that the standby OLT is based on the address
  • the information is restored to generate the multicast protocol data.
  • the address information carries the source PON port, the destination PON port, and the ID of the GEM multicast group.
  • an apparatus for protecting a multicast switch including: a first sending unit configured to send a join packet to an IP network control end by using a primary OLT; and a receiving unit configured to be from the IP
  • the network control terminal receives the multicast protocol data that is responsive to the joining packet;
  • the second sending unit is configured to send the multicast protocol data to the standby OLT.
  • the second sending unit includes: an extracting subunit, configured to extract address information from the multicast protocol data; and a sending subunit, configured to send the address information to the standby OLT, so that the standby OLT is based on the address The information is restored to generate the multicast protocol data.
  • an apparatus for protecting a multicast switch including: a monitoring unit configured to monitor an operating state of an active OLT; and a starting unit configured to: when the working state of the active OLT is In the event of a failure, the PON port of the standby OLT is activated; the sending unit is configured to send a multicast data stream to the ONU according to the multicast protocol data through the PON port of the standby OLT.
  • a system for protecting a multicast switch including: an IP network control end, a primary OLT, a standby OLT, and an ONU; and the ONU is configured to pass the primary OLT optical line terminal to the IP
  • the network control terminal sends the join packet; and receives, by the primary OLT, the multicast protocol data that is responsive to the join packet from the IP network control end; and sends the multicast protocol data to the standby OLT.
  • the IP network control end is configured to monitor the working state of the active OLT; when the working state of the active OLT is faulty, start the PON port of the standby OLT; and pass the PON port of the standby OLT according to the
  • the multicast protocol data sends a multicast data stream to the ONU.
  • the ONU sends the multicast protocol data to the standby OLT.
  • the multicast service can quickly switch to the standby OLT, so that the user has smooth Watch the effect, not to interrupt the watched video and wait for too long.
  • FIG. 1 is a schematic diagram of a basic operation process of a multicast service in the prior art and a Type B protection network across the OLT;
  • FIG. 2 is a schematic flowchart of an embodiment of a method for protecting a multicast switch according to the present invention;
  • FIG. 4 is a schematic diagram of an application scenario for implementing fast switching by using the method according to the present invention;
  • FIG. 4 is a schematic diagram of an application scenario for protecting a multicast switch according to the present invention
  • FIG. 6 is a schematic structural diagram of another embodiment of a device for protecting multicast switching according to the present invention
  • FIG. 7 is a schematic structural diagram of a system for protecting multicast switching according to the present invention.
  • the method includes the following steps: Step 11: An ONU optical network allocation unit sends a join packet to an IP network control end by using a primary OLT optical line terminal.
  • the set top box sends the on-demand information to the primary OLT, and the ONU sends the join packet to the primary OLT through the splitter, and the primary OLT sends the join packet to the IP network control end.
  • Step 12 The ONU receives, by the primary OLT, the multicast protocol data that is responsive to the join packet from the IP network control end.
  • the step is specifically: the IP network control end sends the primary network OLT to the primary OLT.
  • the primary OLT sends, by using a splitter, the multicast protocol data that is responsive to the joining packet to the ONU.
  • Step 13 The ONU sends the multicast protocol data to the standby OLT.
  • the step is specifically: the ONU sends the multicast protocol data to the standby OLT through a splitter.
  • Step 14 The IP network control end monitors the working state of the active OLT optical line terminal.
  • Step 15 When the working state of the active OLT is faulty, the IP network control end starts the PON port of the standby OLT.
  • Step 16 The IP network control end sends a multicast data stream to the ONU optical network allocation unit by using the PON port of the standby OLT.
  • the step is specifically: the IP network control end sends a multicast data stream to the standby OLT through the splitter, so that the standby OLT sends the multicast data stream to the ONU through the PON port according to the multicast protocol data.
  • the multicast protocol data carries address information, and the address information carries the source PON port, the destination PON port, and the ID of the GEM multicast group.
  • Step 17 The ONU sends the multicast data stream to a set top box.
  • FIG. 3 is a schematic diagram of another embodiment of a method for protecting a multicast switch according to the present invention. The method includes the following steps: Step 21: An ONU optical network allocation unit sends a join packet to an IP network control end by using a primary OLT optical line terminal.
  • the set top box sends the on-demand information to the primary OLT, and the ONU sends the join packet to the primary OLT through the splitter, and the primary OLT sends the join packet to the IP network control end.
  • Step 22 The ONU receives, by the primary OLT, the multicast protocol data that is sent to the IP network control end, and the multicast protocol data carries the address information; the address information carries the source PON interface. The destination PON port and the ID of the GEM multicast group.
  • Step 23 The ONU extracts the address information from the multicast protocol data, and sends the address information to the standby OLT, so that the backup OLT restores the multicast protocol data according to the address information.
  • Step 24 The IP network control end monitors the working state of the active OLT optical line terminal.
  • Step 25 When the working status of the active OLT is faulty, the IP network control end starts the PON port of the standby OLT;
  • Step 26 The IP network control end sends a multicast data stream to the ONU optical network allocation unit through the PON port of the standby OLT.
  • the step is specifically: the IP network control end sends a multicast data stream to the standby OLT, so that the standby OLT sends the multicast data stream to the ONU through the PON port according to the multicast protocol data.
  • Step 27 The ONU sends the multicast data stream to a set top box.
  • the application scenario of the present invention is described below. As shown in FIG. 4, a method for implementing fast switching of multicasts across OLTs is implemented by using an ONU to perform dynamic synchronization of multicast data, that is, the primary When the OLT 1 is working normally, the LUN is added to the protection port, and the multicast stream is added to the backup OLT 2 where the protection port is located.
  • the multicast data stream is sent to the protection port in advance, and is forwarded to the PON port of the OLT 2 in advance.
  • the OLT port of the standby OLT 2 is closed, so the standby OLT 2 cannot forward the multicast stream to the ONU; when the primary OLT 1 is abnormally disconnected, it switches to the standby OLT 2, and the PON port of the standby OLT 2
  • the ONUs on the protection port can receive the multicast data stream quickly, so that the multicast service is not interrupted and fast protection switching is implemented.
  • Step 1 The multicast service normally reaches the user through the OLT 1;
  • Step 2 In order to reduce the amount of synchronized data, the ONU extracts key information (mainly address information) from the join packet to perform a synchronization operation.
  • Step 3 The ONU performs data transfer, that is, the multicast protocol data is synchronized by the path indicated by the dotted line in FIG. 4, so that both the OLT 1 and the OLT 2 in the protection group can receive the synchronization information.
  • the OLT 2 restores the synchronization information to an IGMP protocol message.
  • OMCI can be used for synchronization.
  • This method supports hardware implementation, and this method transmits more data at a time to meet the synchronization requirements. In this step, the entire message does not need to be synchronized, which reduces the complexity and synchronization time of the synchronization data.
  • This method is used to implement fast multicast switching across OLTs. It is not limited to the network. There is no problem of limited synchronization. It does not depend on the upper-layer network. The ONU cannot synchronize when there is a problem with the ONU or the optical link is abnormal. It does not affect the multicast processing under normal conditions.
  • the bottom layer only provides transparent tunnels, and interacts through the OMCC (ONT management and control channel) channels.
  • OMCC ONT management and control channel
  • Each ONU uses its own OMCC channel for synchronization processing. Will have an impact.
  • Another application scenario of the multicast fast switching process of the method is described below. In this application scenario, when the multicast service is viewed, the multicast service is quickly reached by the OLT 2 when the primary OLT 1 is abnormal.
  • Step A The line card receives the IGMP (Internet Group Management Protocol) protocol packet;
  • Step B The multicast module of the OLT 1 processes the packet and forwards it to the main control module of the OLT 1 After refining, it is delivered to the underlying driver module of OLT 1;
  • Step C The underlying driver module of the OLT 1 is encapsulated and then sent to the ONU through the OMCC channel.
  • Step D After receiving the message, the ONU does not perform data processing, and sends it to the OLT 1 and the OLT in the protection group respectively.
  • Step E After receiving the response, the working port OLT 1 is used to confirm that the ONU has forwarded; meanwhile, the standby OLT 2 has received the data synchronization information; otherwise, after a certain time, the underlying driver module of the OLT 1 needs to resend.
  • Step F The OMCI message is monitored on the OLT 2 side, and after the message is received, the message is extracted and reported to the multicast protocol module of the OLT 2 according to the format agreed by the multicast module of the OLT 2;
  • Step G OLT 2 After receiving the synchronization data message, the multicast module performs message processing, and forwards it to the main control module of the OLT 2, and sends the join or leave message to notify other modules to perform corresponding processing.
  • Step H The OLT 2 processes the data according to the synchronized data.
  • Step J After the ONU is disconnected, data synchronization cannot be performed.
  • the underlying driver of the OLT 2 obtains that the ONU is offline, and notifies the multicast module of the OLT 2 that the multicast service under the ONU needs to be completely disconnected. As shown in FIG.
  • the apparatus for protecting multicast switching includes: a first sending unit 51 configured to send a joining packet to an IP network control end by using a primary OLT optical line terminal; and receiving unit 52 And receiving, by the IP network control end, the multicast protocol data that is responsive to the joining packet; and the second sending unit 53 is configured to send the multicast protocol data to the standby OLT.
  • the second sending unit includes: an extracting subunit, configured to extract address information from the multicast protocol data; and a sending subunit, configured to send the address information to the standby OLT, so that the standby OLT is based on the address The information is restored to generate the multicast protocol data. As shown in FIG.
  • the device for protecting multicast switching according to the present invention includes: The monitoring unit 61 is configured to monitor the working state of the active OLT; the starting unit 62 is configured to start the PON of the standby OLT when the working state of the active OLT is faulty; the sending unit 63 is configured to pass the The PON port of the standby OLT sends a multicast data stream to the ONU according to the multicast protocol data.
  • the system for protecting multicast switching according to the present invention includes: an IP network control end 71, a main OLT 72, a standby OLT 73, and an ONU 74; and the ONU is set to pass the primary use.
  • the OLT optical line terminal sends the joining packet to the IP network control end; receiving, by the primary OLT, the multicast protocol data that is responsive to the joining packet from the IP network control end; and sending the multicast protocol data to the standby OLT .
  • the IP network control end is configured to monitor the working state of the active OLT; when the working state of the active OLT is faulty, start the PON port of the standby OLT; and pass the PON port of the standby OLT according to the
  • the multicast protocol data sends a multicast data stream to the ONU.
  • the present invention can be applied to a passive optical network system (XPON) including GPON and XGPON.
  • the method includes the steps of the foregoing method embodiment, such as: a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM). Wait.
  • the sequence numbers of the steps are not used to limit the sequence of the steps.
  • the steps of the steps are changed without any creative work. It is also within the scope of the invention.
  • the above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

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

Abstract

La présente invention porte sur un procédé, un appareil et un système pour protéger un basculement de diffusion groupée, qui concerne le domaine des réseaux optiques. Le procédé pour protéger un basculement de diffusion groupée comprend les opérations suivantes : une ONU envoie un paquet de jonction à une extrémité de commande de réseau IP par utilisation d'un OLT actif; l'ONU reçoit, par utilisation de l'OLT actif, des données de protocole de diffusion groupée en réponse au paquet de jonction en provenance de l'extrémité de commande de réseau IP; et l'ONU envoie les données de protocole de diffusion groupée à un OLT de secours. Dans la présente invention, une ONU envoie des données de protocole de diffusion groupée à un OLT de secours, de sorte qu'un service de diffusion groupée peut être rapidement basculé vers l'OLT de secours dans un processus suivant dans le cas où une exception survient sur un OLT actif.
PCT/CN2013/082009 2013-03-19 2013-08-21 Procédé, appareil et système pour protéger un basculement de diffusion groupée Ceased WO2014146395A1 (fr)

Applications Claiming Priority (2)

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CN201310088567.4 2013-03-19
CN201310088567.4A CN104065493A (zh) 2013-03-19 2013-03-19 保护组播倒换的方法、装置以及系统

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CN104506972B (zh) * 2015-01-07 2018-02-13 烽火通信科技股份有限公司 一种xgpon系统保护倒换的快速测距方法
CN107612826B (zh) * 2017-09-28 2020-01-07 烽火通信科技股份有限公司 一种实现ptn 1:1和otn 1+1的叠加保护方法
US10735248B2 (en) * 2018-02-12 2020-08-04 Futurewei Technologies, Inc. Cloudified N-way routing protection at hyper scale
CN109104343B (zh) * 2018-09-30 2021-01-26 四川长虹电器股份有限公司 Pon融合型网关stb设备业务建立的优化方法
CN113810508A (zh) * 2020-06-17 2021-12-17 中兴通讯股份有限公司 局端设备控制方法、局端设备、装置、系统及存储介质

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CN101674222A (zh) * 2008-09-10 2010-03-17 华为技术有限公司 组播的切换方法及系统
CN101834687A (zh) * 2009-03-11 2010-09-15 华为技术有限公司 光接入网络的主备倒换方法、系统和设备
US20110262138A1 (en) * 2009-09-01 2011-10-27 Zte Corporation Method and Device for Processing Broadcast Packets/Multicast Control Messages

Patent Citations (4)

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CN101414920A (zh) * 2007-10-17 2009-04-22 中兴通讯股份有限公司 一种点到多点光网络中实现组播预览的方法
CN101674222A (zh) * 2008-09-10 2010-03-17 华为技术有限公司 组播的切换方法及系统
CN101834687A (zh) * 2009-03-11 2010-09-15 华为技术有限公司 光接入网络的主备倒换方法、系统和设备
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