WO2008141506A1 - Procédé de protection de supports hétérogènes destinés à un réseau optique passif - Google Patents

Procédé de protection de supports hétérogènes destinés à un réseau optique passif Download PDF

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Publication number
WO2008141506A1
WO2008141506A1 PCT/CN2007/003968 CN2007003968W WO2008141506A1 WO 2008141506 A1 WO2008141506 A1 WO 2008141506A1 CN 2007003968 W CN2007003968 W CN 2007003968W WO 2008141506 A1 WO2008141506 A1 WO 2008141506A1
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WO
WIPO (PCT)
Prior art keywords
port
vlan
line
protected
pon
Prior art date
Application number
PCT/CN2007/003968
Other languages
English (en)
Chinese (zh)
Inventor
Mingsheng Li
Hongxi Zhagn
Original Assignee
Zte Corporation
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 Zte Corporation filed Critical Zte Corporation
Publication of WO2008141506A1 publication Critical patent/WO2008141506A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H04L12/2858—Access network architectures
    • H04L12/2861—Point-to-multipoint connection from the data network to the subscribers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H04L12/2869—Operational details of access network equipments
    • H04L12/2878—Access multiplexer, e.g. DSLAM
    • H04L12/2879—Access multiplexer, e.g. DSLAM characterised by the network type on the uplink side, i.e. towards the service provider network
    • H04L12/2885—Arrangements interfacing with optical systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
    • 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
    • H04L45/22—Alternate 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
    • H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects
    • H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability

Definitions

  • the present invention relates to a passive optical network (hereinafter referred to as PON) protection method, and more particularly to a heterogeneous media protection method for a passive optical network.
  • PON passive optical network
  • the PON is a single-fiber bidirectional optical access network using a Point to Multi Point (P2MP) structure.
  • the Optical Line Terminal hereinafter referred to as the OLT
  • the optical network unit hereinafter referred to as the ONU
  • ⁇ optical network terminal
  • ODN optical distribution network
  • the typical topology of the PON is a tree type.
  • the ODN provides an optical transmission channel between the central office OLT and the user-side ONU.
  • ONU and ONT are collectively referred to herein as ONUs.
  • the protection reverse of PON means that in order to improve the security of the network, usually one or several spare lines are set up in the PON network.
  • the spare line can use PON, or can use digital subscriber line (DSL) or wireless network ( Hereinafter referred to as "wireless", when the main line fails, the alternate line communication is used to maintain the security of the network.
  • DSL digital subscriber line
  • wireless wireless
  • the protection switching control module monitors the working status and related alarm information of the OLT PON module online.
  • the protection switching control module receives alarm information such as line faults and signal degradation from the OLT, it determines whether it is based on a preset mechanism.
  • the switchover is performed, and the optical switch is triggered to switch, thereby implementing active/standby switchover of the backbone fiber of the PON system.
  • Type A protection is shown in Figure la. It only protects the trunk fiber, no protocol is required, but the protection is slow and cannot be automated.
  • Type B Type B protection is shown in Figure lb. There is also no need for a protocol, but the backup channel is in cold backup and the protection is slow.
  • Type C Type C protection is shown in Figure lc. Its protection protocol is specified in G.983.5. It is fast protection and can support various protection working modes, such as 1+1/1: 1 and load sharing. The disadvantage is that the entire ODN network is duplicated, which is more difficult and costly in actual construction and network planning.
  • Heterogeneous media protection There are many access technologies at the access level, such as PON, DSL and wireless. Heterogeneous media protection refers to the protection of introducing different media or different technologies as backup lines.
  • Figures 2 to 5 show four typical heterogeneous media protection mode network configurations.
  • Type a As shown in Figure 2a, the OLT integrates PON and DSL, and performs service protection between PON and copper DSL. DSL provides protection channel for PON, and protection switching is implemented between ONU and OLT.
  • b Figure 2b As shown, the OLT integrates the PON and the BS, and protects between the PON and the radio. The wireless channel provides a protection channel for the PON, and the protection is performed between the ONU and the OLT.
  • c-type as shown in Figure 2c, the OLT and the BS are separated and configured.
  • the OLT and the BS are independent systems.
  • the physical locations of the two systems can be arbitrary.
  • Their Service Node Interface (SNI) is connected to the upper Layer 3 switch at the same time, and is protected in the ONU and Layer 3.
  • SNI Service Node Interface
  • d type As shown in Figure 2d, is the OLT and Digital Subscriber Line Modem (DSLM) separate protection configuration, OLT and DSLM are independent systems, the physical location of the two systems It can be arbitrary, their SNI interface is connected to the upper Layer 3 switch at the same time, and the protection is performed on the ONU and the Layer 3 switch.
  • DSLM Digital Subscriber Line Modem
  • the PON interface already has a dedicated private security tunnel (PST) to transmit the protection switching control message.
  • PST private security tunnel
  • PON requires similar protection switching control messages to be developed in both DSL and wireless channels, which involves changes to existing DSL and wireless standards.
  • ⁇ in protection types c and d, due to the main line PON and the alternate line DSL or The wireless devices are independent of each other and are connected to the upper-layer network through the SNI interface. Therefore, a channel for transmitting protection switching control messages needs to be established between the upper-layer network device (the Layer 3 switch in the figure) and the ONU.
  • the object of the present invention is to provide a heterogeneous media protection method for a passive optical network, which overcomes the existing implementation of the heterogeneous media protection method and requires additional definition standards.
  • the problems and shortcomings of the protocol provide a simple and efficient way to implement PON network service protection.
  • the present invention provides a heterogeneous media protection method for a passive optical network, including: Step 1. Divide a port of each client device into at least one VLAN, where the VLAN includes at least the user equipment. The protected primary line port and the alternate line port; Step 2: Each protected port of the central office device is divided into the VLAN where the user equipment port connected to the port is located; Step 3, in the central office device and The multi- spanning tree protocol (MSTP) is enabled on the Ethernet core of the client device, and the port number of the active line is set to be smaller than the port number of the standby line.
  • MSTP multi- spanning tree protocol
  • Step 3 is specifically as follows: Step 31: Enable MSTP of the Ethernet core of the central office device, enable MSTP of the Ethernet core of the user equipment; Step 32, set the port number of the primary line to be smaller than the standby line. The port number; Step 33: The MSTP shields the alternate line port.
  • Step 1 is specifically as follows: Step 11. The port of each client device is divided into a protected port and an unprotected port. Step 12: Set each client device to protect a protected port of the client device. Divided into one VLAN; Step 13.
  • the method further includes: Step 5: After receiving the service data, the user equipment determines whether the service data is protected data, and if yes, sends the service data to the VLAN where the protected port is located, otherwise sent to The VLAN where the protected port is located.
  • the invention provides a heterogeneous media protection method for a passive optical network. In the prior art, the Ethernet protocol must be redefined to be implemented. The invention simplifies the process by enabling MSTP by application, and improves the efficiency of PON protection. Specifically: (1) The MSTP protocol is applied at the link layer, and has nothing to do with specific technologies, and can work in DSL,
  • PON, wireless and other technologies can be used for protection between the same technology and support for protection between heterogeneous technologies
  • (2) ONU is the protection object: The VLAN is divided into ONUs, and the protection object is clear;
  • MSTP is a commonly used and mature technology in Ethernet. Generally, Ethernet switches support this protocol. Supporting this protocol will not introduce additional cost, and the technology is very mature;
  • GPON OLT and DSLAM or BS integrated topology is also suitable for GPON OLT and DSLAM or BS separation structure, and GPON OLT and DSLAM or BS can Placed in different physical locations.
  • FIG. 1a is a schematic view showing the structure of a type A existing with the same medium protection
  • Figure lb is a schematic diagram of the structure of the type B of the existing media protection
  • Figure lc is a schematic diagram of the structure of the existing type of media protection
  • Figure 2a is a schematic diagram of the structure of the existing heterogeneous medium protection type
  • Figure 2b is the existing heterogeneous medium protection
  • Figure 2c is a schematic diagram of the structure of the type c of the existing heterogeneous medium protection
  • Figure 2d is a schematic diagram of the type d structure of the existing heterogeneous medium protection
  • Figure 3 is a heterogeneous media protection of the passive optical network according to the present invention
  • FIG. 4 is a schematic structural diagram of dividing a VLAN by using the method proposed by the present invention
  • FIG. 5 is a schematic structural view of a main line disconnected by using the method proposed by the present invention
  • FIG. 6 is a schematic diagram of the method according to the present invention
  • Figure 7 is a flow chart of a preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION The present invention will be further described below in conjunction with the accompanying drawings.
  • a heterogeneous media protection method for a passive optical network is provided. The method includes: Step S102: Divide a port of each client device into at least one VLAN, where the VLAN includes at least a protected host of the user equipment.
  • each protected port of the central office device is divided into a VLAN in which the user equipment port connected to the protected port of the central office device is located;
  • Step S106 at the central office
  • the Ethernet core of the device and the client device enables the multiple spanning tree protocol, and sets the port number of the active line to be smaller than the port number of the standby line, so as to cover the VLAN corresponding to the alternate line port;
  • Step S108 when the primary line fails
  • the multiple spanning tree protocol masks the VLAN corresponding to the alternate line port, and switches the service from the primary line to the standby line, and shields the VLAN corresponding to the primary line port.
  • the service configuration of the OLT is as follows:
  • the downlink port 1 and the downlink port 2 correspond to the primary link and the backup link, respectively, such as the PON link and the DSL link in the above example, and the PON chain.
  • the DSL link is the backup line.
  • the two downlink ports are configured with the same VLAN. That is, all the ONU protected VLANs are matched.
  • the DSL line is used as the backup line.
  • OLT and ONU service configuration First, configure the PON link and the DSL link respectively.
  • the PON link is the main line and the DSL link is the standby line.
  • the SVLAN-capable data packet from the SNI can find the original uplink VLAN, and replace the SVLAN with the VLAN corresponding to the downlink port, and send it out from the corresponding downlink port.
  • the above key fields can be service type/service level (TOS/COS), DA-MAC, SA-MAC, SA-IP, DA-IP fields.

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

Abstract

L'invention concerne un procédé de protection de supports hétérogènes destinés à un réseau réseau optique passif (PON). Le procédé de l'invention vise à résoudre le problème de mise en oeuvre complexe et de nécessité de norme ou de définition de protocole supplémentaire. Le procédé de l'invention comprend les étapes suivantes : une ligne primaire protégée et une ligne de sauvegarde sont attribuées à un réseau local virtuel (VLAN); chaque port protégé d'un dispositif de bureau est attribué à un VLAN destiné au port d'un dispositif utilisateur qui est relié au port protégé du dispositif de bureau; le MSTP est exécuté dans le dispositif de bureau et le dispositif utilisateur, et le numéro de port destiné à la ligne primaire est conçu pour être inférieur à celui de la ligne de sauvegarde pour bloquer le VLAN associé au port de la ligne de sauvegarde. Lors d'une panne de la ligne primaire, le VLAN associé au port de la ligne de sauvegarde est débloqué par le MSTP, le trafic est commuté de la ligne primaire à la ligne de sauvegarde, et le VLAN associé au port de la ligne primaire est bloqué. Le procédé de l'invention s'applique principalement à la protection de supports hétérogènes destinés à un PON, et ne nécessite pas de norme, ni de définition de protocole supplémentaire, ce qui rend ce procédé facile à mettre en oeuvre.
PCT/CN2007/003968 2007-05-24 2007-12-29 Procédé de protection de supports hétérogènes destinés à un réseau optique passif WO2008141506A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710105246.5 2007-05-24
CN2007101052465A CN101051854B (zh) 2007-05-24 2007-05-24 一种无源光网络的异种媒体保护方法

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WO2008141506A1 true WO2008141506A1 (fr) 2008-11-27

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WO (1) WO2008141506A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN101316257B (zh) * 2007-05-31 2012-08-22 华为技术有限公司 数字用户线接入复用器、光网络单元、光线路终端和基站
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
CN101557313B (zh) * 2009-04-21 2012-09-26 烽火通信科技股份有限公司 一种电信级宽带接入设备上联板卡保护的方法
US9185555B2 (en) 2010-04-22 2015-11-10 Futurewei Technologies, Inc. Method for authentication of a wireless backup system for an optical network unit
CN114978299A (zh) * 2021-02-24 2022-08-30 华为技术有限公司 一种通信方法、装置及系统

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US6976088B1 (en) * 1997-12-24 2005-12-13 Cisco Technology, Inc. Method and apparatus for rapidly reconfiguring bridged networks using a spanning tree algorithm

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CN101051854A (zh) 2007-10-10

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