WO2010037305A1 - Procédé, dispositif de noeud et réseau en anneau pour la notification de reroutage - Google Patents

Procédé, dispositif de noeud et réseau en anneau pour la notification de reroutage Download PDF

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Publication number
WO2010037305A1
WO2010037305A1 PCT/CN2009/073830 CN2009073830W WO2010037305A1 WO 2010037305 A1 WO2010037305 A1 WO 2010037305A1 CN 2009073830 W CN2009073830 W CN 2009073830W WO 2010037305 A1 WO2010037305 A1 WO 2010037305A1
Authority
WO
WIPO (PCT)
Prior art keywords
node
ring
service
oduk
oduk ring
Prior art date
Application number
PCT/CN2009/073830
Other languages
English (en)
Chinese (zh)
Inventor
王彧
杨榆
饶宝全
任彦琦
谭文剑
黄蕾
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2010037305A1 publication Critical patent/WO2010037305A1/fr

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Classifications

    • 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
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0287—Protection in WDM systems
    • H04J14/0293—Optical channel protection
    • H04J14/0295—Shared protection at the optical channel (1:1, n:m)
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/08—Intermediate station arrangements, e.g. for branching, for tapping-off
    • H04J3/085—Intermediate station arrangements, e.g. for branching, for tapping-off for ring networks, e.g. SDH/SONET rings, self-healing rings, meashed SDH/SONET networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0028—Local loop
    • H04J2203/0039—Topology
    • H04J2203/0042—Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0051—Network Node Interface, e.g. tandem connections, transit switching
    • H04J2203/0053—Routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0057—Operations, administration and maintenance [OAM]
    • H04J2203/006—Fault tolerance and 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 Wavelength Division Multiplexing (WDM) network technology, and in particular, to a method, a node device, and a ring network for notification rerouting.
  • WDM Wavelength Division Multiplexing
  • the optical channel transport unit (ODUk) ring protection of the 0DU1 or 0DU2 level is created in the WDM network.
  • the ODUk ring protection is a channel-level protection mode.
  • the channel-level protection mode in this WDM network is the multiplex section protection applied in the Synchronous Digital Hierarchy (SDH) network (Multiplexer Section Protection, below).
  • SDH Synchronous Digital Hierarchy
  • MSP Multiplexer Section Protection
  • FIG. 1 is a schematic diagram of the structure of the ODUk ring protection service of the prior art.
  • the ring nodes A, B, and C of the protection group of the ODUk ring are shown in Figure 1.
  • D, E, F there are two links between each two ring nodes, which are the opposite working link 1 and the standby link 2.
  • the service is switched from the working channel to On the protection channel, the ODUk ring can only be switched on the ingress or outbound nodes. The other ring nodes cannot be switched.
  • Automat ica l ly Swi tched Opt ica l Network (hereinafter referred to as ASON) is a new generation optical transport network based on WDM network combined with automatic control technology, which can automatically complete the network exchange connection function automatically. That is, on the basis of automatic discovery of network resources and topology resource structures, an end-to-end automatic connection is established through signaling processing and interaction.
  • the AS0N has automatic discovery, automatic service establishment, and business recovery.
  • the automatic discovery function uses a Link Management Protocol (LMP) to discover and verify links between two network devices, and uses a routing protocol to flood the discovered links throughout the network. Each device in the network can learn the network topology information.
  • LMP Link Management Protocol
  • the automatic service establishment function utilizes the automatic control technology. The user only needs to select the source node and the destination node related information of the service, and can automatically establish a service, and the route of the service is the most Excellent;
  • the service recovery function is to automatically detect the failure of the service when the service is interrupted, and automatically establish a new path to recover the interrupted service.
  • the inventor has found that at least the following defects exist in the prior art: Since the link resource needs to update the network topology information, that is, the information of the network map, the information of the updated network map must rely on the control channel.
  • the routing protocol floods the information.
  • the flooding efficiency of the routing information is much lower than that of the channel alarm. Therefore, the efficiency of the ODUk ring failure and rerouting is relatively low, resulting in a long service recovery time.
  • the embodiment of the present invention provides a method for notifying a rerouting, a node device, and a ring network, so as to quickly and accurately determine the fault of the ODUk ring when the service is interrupted due to a fault in the ODUk ring. Sending routing problems.
  • the embodiment of the invention provides a method for notifying rerouting, including:
  • the edge node of the optical channel data unit ring receives the ODUk ring channel alarm, and determines whether the service of the ODUk ring is interrupted according to the ODUk ring channel alarm;
  • the border node of the ODUk ring notifies the opposite node of the border node to trigger re-routing when the service is interrupted due to an intra-ring failure.
  • a receiving module configured to receive an ODUk ring channel alarm
  • the notification module is configured to: when the service of the ODUk ring is interrupted, notify the peer node of the local node to trigger re-routing when the service is interrupted due to an intra-ring failure.
  • the embodiment of the present invention further provides a ring network, including a border node of the ODUk ring and a peer node of the border node, where the border node of the ODUk ring is configured to receive an ODUk ring channel alarm, according to the ODUk ring.
  • the channel alarm determines whether the service of the ODUk ring is interrupted; if the service of the ODUk ring is interrupted, the peer node is notified to trigger rerouting if the service is interrupted due to an intra-ring failure; the peer node After receiving the notification, if the service is interrupted due to a fault in the ring, rerouting is triggered.
  • the peer node is notified to trigger the re-routing when the service is interrupted due to the fault in the ring, which can ensure that the peer node only fails in the ODUk ring. Rerouting in case of service interruption, to reduce the processing load of the node, save the time required for service recovery, and improve the rerouting efficiency.
  • FIG. 1 is a schematic structural diagram of a prior art ODUk ring protection service
  • Embodiment 2 is a flowchart of Embodiment 1 of a method for notifying rerouting according to the present invention
  • 3 is a flowchart of Embodiment 2 of a method for notifying rerouting according to the present invention
  • FIG. 4 is a schematic diagram of a network structure applied to an embodiment of a method for notifying rerouting according to the present invention
  • FIG. 5 is a flowchart of Embodiment 3 of a method for notifying rerouting according to the present invention
  • Embodiment 1 of a method for notifying rerouting according to the present invention.
  • the method for rerouting may include:
  • Step 201 The border node of the ODUk ring receives the ODUk ring channel alarm, and determines whether the service of the ODUk ring is interrupted according to the ODUk ring channel alarm.
  • the ODUk ring channel alarm is generated.
  • the border node of the ODUk ring determines whether the service of the ODUk ring is interrupted according to the ODUk ring channel alarm.
  • the boundary node of the ODUk ring may be the outgoing node of the ODUk ring, or It is the entry node of the ODUk ring.
  • the border node of the ODUk ring determines whether the service is interrupted, including the following:
  • the border node of the ODUk ring receives the ODUk ring channel alarm sent by the link on the working channel, and then switches the service to the protection channel. After a predetermined time, it receives the ODUk sent by the link on the protection channel. If the ring channel alarms, the service interruption of the ODUk ring is determined. In the actual application, the link on the working channel is interrupted, and the ODUk ring channel alarm is issued. At this time, the service on the working channel cannot be transmitted. The border node of the ODUk ring switches the service to the protection channel through the channel switching to continue the transmission. The transfer can be resumed on the protection channel within 500ms.
  • the link of the protection channel is also interrupted and an ODUk ring channel alarm is issued, the service cannot be transmitted on the protection channel, and the service is interrupted for more than a predetermined time. Since the service may be unstable within a certain period of time when the service is switched from the working channel to the protection channel, first set a predetermined time. If the link on the protection channel issues an ODUk ring channel alarm within the predetermined time, it may be It is caused by instability at the time of switching, At this point, it is considered that the service can be transmitted on the protection channel. If the ODUk ring channel alarm occurs on the link on the protection channel after a predetermined time, the service is interrupted.
  • the link on the protection channel sends an ODUk ring channel alarm within 600ms after the link on the working channel is interrupted and the ODUk ring channel alarm is issued. This may be caused by the instability when the switching occurs. At this time, it is considered that the service can be transmitted on the protection channel; if the ODUk ring channel alarm occurs on the link on the protection channel after 600ms, the service is interrupted.
  • the border node of the ODUk ring receives the ODUk ring channel alarm sent by the link on the working channel. If the service cannot be successfully switched to the protection channel, the service interruption of the ODUk ring is determined.
  • Step 202 If the border node of the ODUk ring determines that the service of the ODUk ring is interrupted, the border node notifies the peer node of the border node to trigger a heavy path when the service is interrupted due to a fault in the ring.
  • the border node of the ODUk ring After the border node of the ODUk ring determines that the service of the ODUk is interrupted, it notifies its peer node whether it receives an outbound alarm. If no outbound alarm is received, the service is interrupted due to a fault in the ring, and the peer node triggers rerouting.
  • Step 504 The loop-out node 02 determines whether an out-of-loop alarm is received to determine whether it is interrupted due to an out-of-loop fault. If the loop-out node 02 does not receive an out-of-loop alarm, indicating that the service interruption is caused by a fault in the ODUk ring, The outgoing node 02 triggers rerouting.
  • the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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

Abstract

L'invention concerne un procédé, un dispositif de noeud et un réseau en anneau pour la notification de reroutage, qui consiste à: recevoir au noeud limite de l'unité de données de canal optique l'alarme de canal d'anneau ODUk et à déterminer si l'interruption intervient dans le service de l'anneau ODUk selon ladite alarme; si tel est le cas, l'anneau ODUk demande au noeud opposé du noeud limite de déclencher le reroutage lorsque le service est interrompu parce que l'anneau fait l'objet d'un défaut. Le dispositif de noeud comporte des modules fonctionnels pour la mise en oeuvre du procédé décrit. Le réseau en anneau comprend le noeud limite sur l'anneau OODUk et le noeud opposé du noeud limite. Dans le mode de réalisation de l'invention, une fois le défaut localisé comme affectant le service de l'anneau ODUk, le noeud limite demande à son noeud opposé de déclencher le reroutage lorsque le service est interrompu parce que l'anneau fait l'objet d'un défaut, ce qui permet de s'assurer que le noeud opposé lance le reroutage uniquement lorsque le service est interrompu parce que l'anneau ODUk fait l'objet d'un défaut, en vue de réduire la charge de traitement au niveau du noeud, de gagner du temps pour la reprise du service et d'améliorer l'efficacité du reroutage.
PCT/CN2009/073830 2008-09-28 2009-09-09 Procédé, dispositif de noeud et réseau en anneau pour la notification de reroutage WO2010037305A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200810223804A CN101686419A (zh) 2008-09-28 2008-09-28 通知重路由的方法、节点设备及环网络
CN200810223804.2 2008-09-28

Publications (1)

Publication Number Publication Date
WO2010037305A1 true WO2010037305A1 (fr) 2010-04-08

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WO (1) WO2010037305A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104753780B (zh) * 2013-12-26 2020-05-22 中兴通讯股份有限公司 一种potn网络oduk环规划方法及装置
WO2015100531A1 (fr) * 2013-12-30 2015-07-09 华为技术有限公司 Procédé de reroutage et réseau optique à commutation automatique
CN111131935B (zh) * 2019-12-27 2022-03-29 上海欣诺通信技术股份有限公司 Otn倒换方法、装置、设备及存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010046227A1 (en) * 2000-05-23 2001-11-29 Fujitsu Limited Communication device for selecting route of packet
US20020114031A1 (en) * 2001-02-21 2002-08-22 Ryo Yamada Ring configuration method, failure recovery method, and node address assignment method when configuring ring in network
CN1812360A (zh) * 2005-01-25 2006-08-02 华为技术有限公司 智能光网络的业务重路由触发方法
CN1913399A (zh) * 2006-07-31 2007-02-14 华为技术有限公司 数据通信切换方法及系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010046227A1 (en) * 2000-05-23 2001-11-29 Fujitsu Limited Communication device for selecting route of packet
US20020114031A1 (en) * 2001-02-21 2002-08-22 Ryo Yamada Ring configuration method, failure recovery method, and node address assignment method when configuring ring in network
CN1812360A (zh) * 2005-01-25 2006-08-02 华为技术有限公司 智能光网络的业务重路由触发方法
CN1913399A (zh) * 2006-07-31 2007-02-14 华为技术有限公司 数据通信切换方法及系统

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