WO2007085173A1 - Procédé de traitement d'une ressource de réseau et unité de réseau d'un réseau optique intelligent associé - Google Patents

Procédé de traitement d'une ressource de réseau et unité de réseau d'un réseau optique intelligent associé Download PDF

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Publication number
WO2007085173A1
WO2007085173A1 PCT/CN2006/003518 CN2006003518W WO2007085173A1 WO 2007085173 A1 WO2007085173 A1 WO 2007085173A1 CN 2006003518 W CN2006003518 W CN 2006003518W WO 2007085173 A1 WO2007085173 A1 WO 2007085173A1
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WIPO (PCT)
Prior art keywords
network
traffic engineering
virtual
link
engineering link
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PCT/CN2006/003518
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English (en)
French (fr)
Inventor
Li Huang
Yu Yang
Junjie Feng
Xianlong Luo
Jianhua Gao
Junbai Sun
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Huawei Technologies Co., Ltd.
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37298124&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2007085173(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to CN200680012248.3A priority Critical patent/CN101160806A/zh
Priority to EP06840597A priority patent/EP1887733B2/en
Priority to AT06840597T priority patent/ATE441263T1/de
Priority to DE602006008778T priority patent/DE602006008778D1/de
Publication of WO2007085173A1 publication Critical patent/WO2007085173A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/0227Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/0227Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0228Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06Management of faults, events, alarms or notifications
    • H04L41/0654Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0668Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/0278WDM optical network architectures
    • H04J14/0283WDM ring architectures
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/0278WDM optical network architectures
    • H04J14/0286WDM hierarchical architectures
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12Discovery or management of network topologies
    • H04L41/122Discovery or management of network topologies of virtualised topologies, e.g. software-defined networks [SDN] or network function virtualisation [NFV]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/40Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks using virtualisation of network functions or resources, e.g. SDN or NFV entities
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/0073Provisions for forwarding or routing, e.g. lookup tables
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/0086Network resource allocation, dimensioning or optimisation

Definitions

  • the present invention relates to a conventional optical transport network and an intelligent optical network, and more particularly to a method for processing network resources and a smart optical network element in the case of a hybrid network of a conventional optical transport network element and an intelligent optical network network element. . Background of the invention
  • ASON Automatic Switching Optical Network
  • ITU-T G.8080 an Automatic Switching Optical Network
  • ASON adds a control plane based on the traditional optical transport network architecture. Through this control plane, ASON can automatically create, maintain and remove optical connections.
  • the automatic establishment process of the optical connection mainly includes:
  • a network element in the ASON first obtains the fiber connection relationship between itself and other network elements through the link local discovery technology, and abstracts the bandwidth resource of the user service carried in the foregoing fiber connection into a traffic engineering (TE) link.
  • TE traffic engineering
  • the network element advertises its own state and the abstracted TE link state and attribute information through the control plane, and receives status information and TE link status and attribute information advertised by other network elements in the ASON through the control plane.
  • the TE link status indicates information such as the actual connectivity status of the TE link, the actual alarm status, and the actual resource occupancy status
  • the TE link attribute includes connectivity attribute information such as the TE link and bandwidth attribute information. Parameters such as protection type attribute information and multiplex section ring attribute information.
  • control plane essentially utilizes an existing routing protocol, such as the Open Shortest Path First (OSPF) protocol, flooding the TE link state and attribute information advertised by each network element. Go to other NEs in ASON or some pre-configured Path Computation Element (PCE) device.
  • OSPF Open Shortest Path First
  • PCE Path Computation Element
  • the network element or the PCE device in the ASO can generate a "network map" describing the current ASON topology.
  • the "Network Map” mainly includes the following information: information about all NEs in the ASON, status of the TE link, and attributes.
  • the ASON network element When the ASON network element initiates an optical connection, it uses a "network map" determined by itself or the PCE device to obtain a feasible path by combining a preset routing algorithm, and then drives the current signaling protocol. The network elements on the path in turn establish cross-connections.
  • the optical connection creation is completed.
  • the control plane can dynamically protect or recover the service. It can be seen that the network element in ASON is intelligent.
  • Figure 1 shows the common networking structure and service establishment mode at the boundary between ASON and traditional optical transport network when the traditional optical transport network element and the ASON network element are networked.
  • network elements A, B, C, and D are intelligent ASON network elements
  • network elements E and F are non-intelligent traditional optical transmission network elements.
  • two services are established: from the network element B, without going through other network elements, directly from the network element C, the service a 101; and from the network element B, through the network.
  • Element E, F, service b 102 from network element C.
  • the network elements of the traditional optical transport network are not intelligent, the optical connections cannot be dynamically created, maintained, and removed as in the ASON network element. Therefore, for example, the ASON and the conventional optical transport network hybrid networking shown in FIG. 1 are invented by the inventor.
  • the invention process found the following problems:
  • ASON When the link passing through the service of the traditional optical transport network fails, ASON will not be able to know the fault message, and cannot initiate protection or recovery process to protect or recover the service.
  • the network element BEFC can also be configured as a multiplex section ring.
  • the link between the multiplex section ring network element B and the network element C is broken, the service a 101 will be protected by the multiplex section ring, and no protection or recovery is required, but in the existing method,
  • the link state of the multiplex section ring is checked. If the ring of the multiplex section is found to be defective, the multiplex section ring protection is incorrectly determined, thereby incorrectly Initiate protection or recovery for service a 101.
  • the embodiments of the present invention provide a network resource processing method and an intelligent optical network element, which can fully and reasonably utilize the network resources of the traditional optical transport network and the intelligent optical network to implement dynamic allocation of network resources.
  • the network resource processing method implemented by the embodiment of the present invention is applicable to a network of a traditional optical transport network element and a smart optical network element mixed network.
  • the method requires two intelligent optical network networks connected to the traditional optical transport network. Configuring at least one virtual traffic engineering link between at least one traditional optical transport network element and connecting the two intelligent optical network elements; each intelligent optical network element connected to the traditional optical transport network Obtaining virtual traffic engineering link information that is connected to another intelligent optical network network element through a traditional optical transport network, and publishing the obtained virtual traffic engineering link information in the intelligent optical network.
  • Another network resource processing method implemented by the embodiment of the present invention configures at least one of the two intelligent optical network elements connected to the traditional optical transport network and spans at least one conventional optical transport network element and connects the a virtual traffic engineering link of two intelligent optical network elements participating in route calculation; reserved on the traditional optical transport network element corresponding to the virtual traffic engineering chain Bandwidth resources of the road, and establishing cross-connections on the reserved bandwidth resources; each of the intelligent optical network elements connected to the traditional optical transport network respectively acquire virtual traffic engineering connected to another intelligent optical network network element through the traditional optical transport network Link information, and the acquired virtual traffic engineering link information is published in the intelligent optical network.
  • Another network resource processing method implemented by the embodiment of the present invention configures at least one of the two intelligent optical network elements connected to the traditional optical transport network and spans at least one conventional optical transport network element and connects the a virtual traffic engineering link for fault monitoring of two intelligent optical network elements; performing fault monitoring on the virtual traffic engineering link on the intelligent optical network network element and acquiring fault state information; each and a traditional optical transport network
  • the connected intelligent optical network NE obtains the virtual traffic engineering link information that is connected to the other intelligent optical network NE through the traditional optical transport network, and advertises the obtained virtual traffic engineering link and the fault state in the intelligent optical network. information.
  • a further network resource processing method implemented by the embodiment of the present invention configures at least one of the two intelligent optical network elements connected to the traditional optical transport network and crosses at least one traditional optical transport network element and connects to the network.
  • a virtual traffic engineering link of two intelligent optical network elements for fault monitoring and participating in route calculation includes: reserving bandwidth resources corresponding to the virtual traffic engineering link on a traditional optical transport network element And establishing a cross-connection on the reserved bandwidth resource; performing fault monitoring on the virtual traffic engineering link on the intelligent optical network network element and acquiring fault state information; each intelligent optical network element connected to the traditional optical transport network Obtaining virtual traffic engineering link information that is connected to another intelligent optical network element through a traditional optical transport network, and publishing the obtained virtual traffic engineering link and fault state information in the intelligent optical network.
  • the intelligent optical network element includes: a virtual TE link configuration module, configured to configure at least one between two intelligent optical network elements connected to a traditional optical transport network and span at least one traditional Optical transport network element and connecting the two intelligent optical network networks a virtual TE link of the element, and acquiring the configured virtual TE link information; a virtual TE link information issuing module, configured to send virtual TE link information from the virtual TE link configuration module to other network elements in the network or The path calculation unit is released.
  • a virtual TE link configuration module configured to configure at least one between two intelligent optical network elements connected to a traditional optical transport network and span at least one traditional Optical transport network element and connecting the two intelligent optical network networks a virtual TE link of the element, and acquiring the configured virtual TE link information
  • a virtual TE link information issuing module configured to send virtual TE link information from the virtual TE link configuration module to other network elements in the network or The path calculation unit is released.
  • the network resources of the traditional optical transport network connected to the intelligent optical network are abstracted into a virtual TE link, and the network resources of the intelligent optical network are insufficient or derived.
  • the virtual TE link is dynamically allocated in the same manner as a normal TE link configured inside the intelligent optical network. Therefore, the method of the present invention can utilize the network resources of the traditional optical transport network to establish or maintain services.
  • the state change of the virtual TE link is monitored by the network element located at the boundary between the intelligent optical network and the traditional optical switching network, and the state change of the virtual TE link can be released to the intelligent optical network, so that the intelligent optical network element
  • the faults that occur on the optical interfaces of the virtual TE link and the virtual TE link can be discovered in time, and corresponding measures are taken to protect or recover the services affected by the fault.
  • FIG. 1 is a schematic diagram showing a common networking structure and service establishment manner at the boundary between ASON and a traditional optical transport network when a traditional optical transport network element and an ASON network element are networked;
  • FIG. 2 is a flowchart of a method for processing a network resource according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of establishing a virtual TE link in the networking structure shown in FIG. 1 according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a frame format of a TE link type identifier TLV according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a network structure and a method for maintaining a virtual TE link according to Embodiment 3 of the present invention
  • FIG. 6 is a schematic diagram of an internal structure of an ASON network element according to an embodiment of the present invention. Mode for carrying out the invention
  • Embodiments of the present invention provide a method for processing network resources in the case of a hybrid network of a conventional optical transport network element and an intelligent optical network network element.
  • the intelligent optical network described herein generally implements a flexible scheduling of optical connections in an optical network by introducing a control plane in a conventional optical network, for example, including ASON and a general multi-protocol label switching (GMPLS) network.
  • ASON ASON
  • GPLS general multi-protocol label switching
  • Figure 2 shows the process of processing network resources in the case of a hybrid network of ASON network elements and traditional optical transport network elements.
  • the method mainly includes the following steps:
  • Each of the virtual TE links is a logical link that passes through at least one traditional optical transport network element and the two ends of the link are ASON network elements.
  • the logical link usually appears as being between two network elements.
  • the specified logically connected link Usually included but not limited to the following two situations:
  • a link consisting of one or more optical connections across at least one conventional optical transport network element
  • the specific steps of configuring a virtual TE link between a pair of ASON NEs in this step include: configuring a virtual TE on two optical interfaces that are connected to a traditional optical transport network.
  • the link is configured to set the two optical ports to each other as the remote interface of the virtual TE link, and set the ASON network elements where the two optical ports are located to each other as the remote network of the virtual TE link. yuan.
  • a virtual TE link configured between ASON NEs can include the following two types of links:
  • bandwidth resources described herein may include: time slot resources, wavelength resources, sub-wavelength resources or band resources, and the like.
  • the virtual TE link that participates in the routing calculation can also be used for fault monitoring. It should be noted that the time sequence for reserving bandwidth resources and establishing cross-connections for the configured virtual TE link on the traditional optical transport network can be flexibly determined, either before or during the configuration of the virtual TE link. The virtual TE link is performed afterwards without departing from the scope of the invention as intended.
  • a virtual TE link that only performs fault monitoring and does not participate in route calculation is configured between the optical ports that are connected to the traditional optical transport network.
  • FIG. 3 is a schematic diagram of establishing a virtual TE link in the networking structure shown in FIG. 1 according to an embodiment of the present invention.
  • the virtual TE link 201 is connected to the traditional optical transport network element in the ASON network element. Between the optical ports, that is, between the optical port B.1 and the optical port C.1, as shown in Figure 3 The dotted line of 2006/003518 is shown. If the virtual TE link 201 is configured as a virtual TE link that can be configured to participate in route calculation, it is further required to reserve a bandwidth resource corresponding to the virtual TE link for the virtual TE link in the traditional optical transport network element. And establish a cross-connection.
  • the virtual TE link 201 is configured as a virtual TE link that only performs fault monitoring and does not participate in route calculation, it does not need to reserve corresponding bandwidth resources for the virtual TE link in the traditional transport network element, and of course It is possible to establish a cross connection.
  • the time slot and bandwidth attributes of the virtual TE link configured by the ASO can be flexibly configured within the range supported by the physical optical port, and need not be identical to the type of the physical optical port, and the virtual TE chain
  • the physical types of the optical ports at both ends of the road may also be different.
  • optical port B.1 and optical port E.2 are optical ports of 64 VC4 time slots
  • optical ports El, Fl, F.2, and C.1 are optical ports of 16 VC4 time slots.
  • a virtual TE link with a bandwidth ranging from 1 to 16 VC4 slots can be configured between the optical port B.1 and the optical port C.1.
  • a multiplex section ring is configured in a conventional optical transport network, or a multiplex section ring spanning ASON and a conventional optical transport network is configured at the boundary of the conventional optical transport network and the ASON, the conventional optical transport network part is also required.
  • the multiplex section ring configuration information is mapped to a virtual ⁇ ; ⁇ multiplex section ring attribute information in the link attribute, that is, the virtual ⁇ link is identified in the multiplex section ring attribute information in the configured virtual ⁇ link attribute Corresponds to a part of a multiplex section ring.
  • the ASON NE connected to the virtual link obtains the virtual TE link information of the virtual TE link, and further detects the status information of the virtual TE link.
  • the virtual TE link information includes: a type of the virtual TE link and related attribute information.
  • the attributes of the virtual TE link include parameters such as link type information, bandwidth information, protection type information, and multiplex section ring attribute information.
  • the status of the virtual TE link includes its actual connectivity status, actual alarm status information, actual resource occupancy, and so on.
  • the ASON NE connected to the virtual TE link advertises the virtual TE link information and its related state information to the ASON.
  • the ASON utilizes an existing routing protocol, such as the OSHF protocol, to The published virtual TE link information and its status information are flooded to other NEs or PCE devices in the ASON.
  • the multiplex section ring attribute information in the virtual TE link attribute After being flooded to the entire ASON, combined with the multiplex section ring configuration information of the link between the ASON network elements released in the ASON, all the network elements in the ASON or the PCE devices in the network will save the complete multiplex section ring information. .
  • the multiplex section ring attribute information in the virtual TE link attribute is flooded to the entire ASON, and the pair issued by the ASON is combined.
  • the multiplex section ring configuration information of the virtual TE link in the other part of the segment ring should be multiplexed. All network elements in the ASON or PCE devices in the network can also save the complete multiplex section ring information.
  • an embodiment of the present invention will be used for the network element information and the TE link in the ASON.
  • the related information is extended by the OSPF routing protocol used for flooding.
  • link (link) TE link type identifier (TLV) defined by RFC 3630 and RFC 4203 and the included secondary TLV, new ones are added.
  • a secondary sub-TLV belonging to the link TLV is called a TE type identifier TLV.
  • the value field of the TE type identifier TLV identifies whether the TE link described by the link TLV is a normal TE link or a virtual TE link.
  • the frame format of the newly added TE type identifier TLV includes a 4-byte TLV header: 2 bytes are TLV type (Type) field, the configuration value is 0x1001; 2 bytes are TLV The Length field has a configuration value of 4. In addition to the TLV header, the value (Value) part is 4 bytes. Currently, the following three possible values are defined:
  • a normal TE link is also a virtual TE link. If it is a virtual TE link, it can further identify whether it is a virtual TE link participating in route calculation or a virtual link that only performs fault monitoring and does not participate in route calculation.
  • All ASON network elements or PCE devices in the network generate a piece according to the obtained virtual TE link and its related state and attribute information, as well as information of other network elements and related state and attribute information of all common TE links.
  • a "network map” that describes the current ASON topology also known as an ASON topology map.
  • the ASON topology includes: information about all network elements in the ASON, actual connectivity status of the TE link, actual alarm status information, and actual resource usage, including information such as link type information and bandwidth. Attribute information of the TE link including parameters such as information, protection type information, and multiplex section ring information.
  • the TE link described herein can refer to either a normal TE link or a virtual TE link.
  • an ASON network element When an ASON network element initiates an optical connection, it uses a ASON topology map generated by itself or a PCE device to obtain a feasible path by using a predetermined routing algorithm.
  • the path may pass the determined virtual TE chain.
  • the path is associated with the determined virtual TE link, and then the network element on the path is driven by the existing signaling protocol to establish a cross-connection in sequence to create the optical connection.
  • the maintenance includes performing fault monitoring on the established optical connection, and protecting or recovering the interrupted service when the fault occurs.
  • the protection is usually performed when the service is interrupted, and the ASON protects the interrupted service by using an alternate resource pre-allocated by the service with the protection attribute, for example, 1+1 protection; the recovery is usually performed when the service is interrupted.
  • the ASON uses the resources of the network idle to reallocate resources for the service with the recovery attribute to recover the interrupted service, such as reroute recovery.
  • the network element at the boundary between the ASON and the traditional optical switching network monitors the state change of the virtual TE link and publishes the state change information of the virtual TE link to the entire ASON in real time.
  • the method is the same as that used in the step C, and includes: the ASON network element connected to the virtual TE link advertises the virtual TE link and its related state and attribute information to the ASON; the ASON passes the existing routing protocol. For example, the OSPF protocol floods the advertised virtual TE link status and attribute information to other NEs or PCE devices in the ASON.
  • the state change of the virtual TE link in the step includes: changing the state of the optical port corresponding to the virtual TE link.
  • the network element at the boundary between the ASON and the traditional optical switching network can detect the link disconnection or channel alarm between the traditional optical transport network NEs. After that, the NEs at the boundary between the ASON and the traditional optical switching network will be released. The status of the current virtual TE link 201.
  • the network elements B and C located at the boundary between the ASON and the traditional optical switching network will detect the service b 102.
  • There is a fiber break alarm or a channel alarm and then the fault is located on the virtual TE link 201 through the channel fault location process, and then the state of the current virtual TE link 201 is released by the network element B and/or the network element C.
  • ASON judges the impact of the corresponding service according to the state change of the virtual TE link, determines the current on/off state of the service, and takes corresponding processing.
  • the corresponding processing described in this step mainly includes:
  • the multiplexed segment ring is not configured, if it is detected that a broken fiber or a channel alarm occurs on the virtual TE link, it is determined that the virtual TE link is unavailable (DOWN) state. If the service on the service has protection or recovery attributes, ASON initiates corresponding protection or recovery processing for the service;
  • a multiplex section ring is configured, if a fiber break or a channel alarm is detected on the virtual TE link, the existing method is used to determine whether the multiplex section ring has been protected by the multiplex section. If the ring service is not protected and the service has protection or recovery attributes, ASON protects or recovers the service. Otherwise, it does not initiate protection or recovery.
  • Embodiment 1 A method of using a virtual TE link participating in route calculation.
  • a VC4 slot of 1 to 16 for the link between the network element B and the network element E, the network element E, the network element F, the network element F, and the network element C is configured as a virtual TE chain.
  • the bandwidth resource of the road is configured as a virtual TE chain.
  • a virtual TE link for performing fault monitoring and participating in route calculation is configured between the network element B and the network element C, and the following steps are included:
  • the bandwidth resource is the VC4 time slot of the optical interface B.1, and the remote network element of the virtual TE link is configured.
  • the network element C has a remote interface index that is an index of the optical interface C.1, and the link type is a virtual TE link used for fault monitoring and participating in route calculation.
  • the optical interface C.1 As the virtual TE link on the network element C.
  • the bandwidth resource is the VC4 time slot of the optical interface C.1, and the remote network element of the virtual TE link is configured.
  • the remote interface index is the index of B.1
  • the link type is the virtual TE link participating in the route calculation.
  • the virtual TE link and its status and attribute information are flooded into the ASON by using a routing protocol.
  • the status information of the TE link includes: the actual connected state of the TE link detected by the network element, the actual alarm information, the occupation of the actual time slot resource, and the like.
  • the attributes of the TE link specifically include: link type information, TE link bandwidth information, protection type information, and multiplex section ring information, and the like;
  • the service route calculation uses the virtual TE link to establish or re-route the service.
  • the step specifically includes: when the signaling process of establishing the service b 102 goes to the network element B or the network element C, the signaling control establishes the VC4 of the reserved optical port B.1 and the optical port C.1 from 1 to 16 A time slot in a time slot resource and a cross connection between the local network element and another time slot in the optical port of the ASON network.
  • service b 102 has passed the virtual TE link ⁇ '
  • the optical port B.1 detects the fault.
  • the network element B sets the connectivity state of the virtual TE link to DOWN.
  • the connectivity state of the virtual TE link is flooded to the ASON by the routing protocol, so that the rerouting recovery of the service b 102 can be triggered when the service b 102 has the reroute recovery attribute.
  • the service route calculation will exclude the faulty virtual TE.
  • a link is used to calculate another service recovery path. It should be noted that the fiber breakage between the network element C and the network element F also triggers a similar process.
  • the ASON network element connected to the traditional optical transport network will not detect the fault, for example: in the network element E to the network element
  • neither NE nor NE C detects a fault.
  • the service b 102 carried by the virtual TE link is interrupted, the network element on the path of the service b 102 detects the channel failure, and the first network element created by the service b 102 will initiate a channel alarm fault location process, and The fault is located on the virtual TE link, thereby initiating a rerouting recovery process for excluding the virtual TE link, so that the service b 102 is recovered.
  • Embodiment 2 In the case where a multiplex section ring spanning ASON and a conventional optical transport network is configured at a boundary between a conventional optical transport network and an ASON, only fault monitoring is used without participating in a route meter. The virtual TE link counted.
  • a 2-fiber bidirectional multiplex section ring is configured between the network element B, the network element E, the network element F, and the network element C, and only the optical port B.2 in the multiplex section ring is included in the ASON.
  • a virtual TE link that performs fault detection and does not participate in route calculation is configured between port C.1.
  • the multiplex section is used to describe the transition between the network element B and the network element C via the network element E and the network element F. The part that is constructed allows ASON to get a multiplex section ring.
  • a virtual TE link that only performs fault monitoring and does not participate in route calculation is configured between the network element B and the network element C.
  • the specific steps include the following steps:
  • the link type is a virtual TE link that only performs fault monitoring and does not participate in route calculation, and the virtual TE link includes multiplex section configuration information on the optical port B.1.
  • the optical interface C.1 is configured as a virtual TE link on the network element C
  • the remote network element of the virtual TE link is configured as the network element B
  • the index of the remote interface is the index of the optical interface B.1.
  • the TE link type is a virtual TE link that only performs fault monitoring and does not participate in route calculation, and the virtual TE link includes multiplex section configuration information on the optical interface C.1.
  • the network element B and the network element C flood the virtual TE link and related information to the ASON through the routing protocol, and the ASON will discover the optical port B.
  • the actual TE link between the optical port C.2 and the virtual TE link between the optical port B.1 and the optical port C.1 form a multiplex section ring;
  • the optical port B.2 is connected to the optical port.
  • the actual TE link between C.2 and the virtual TE link between optical port B.1 and optical port C.1 form a multiplex section ring. Therefore, it can be judged that the service a 101 shown in FIG. 3 is received.
  • the protection of the multiplex section ring does not require protection or recovery of the service a 101, thereby effectively avoiding the situation in which the protection or recovery processing is initiated erroneously on the service a 101 in the existing method;
  • the optical port B.1 detects the fault.
  • the network element B sets the connectivity state of the virtual TE link to DOWN.
  • the current connectivity state of the TE link is flooded to the ASON by the routing protocol.
  • the ASON can determine that the multiplex section ring protection has expired, thereby initiating protection or recovery for the service a 101.
  • Embodiment 3 In the case where a multiplex section ring is configured in a conventional optical transport network, a virtual TE link is used.
  • FIG. 5 is a schematic diagram of a networking structure and a method for maintaining a virtual TE link according to Embodiment 3, as shown in FIG. 5, two fiber bidirectionals are configured between network elements A, B, E, F, C, and D.
  • the multiplex section ring as shown by the thick solid line in FIG. 5, that is, the entire multiplex section ring passes through two nodes in the ASON and the two half rings of the multiplex section ring are in the traditional network, where the network element A D, E, and F are traditional optical transport network elements, while network elements B and C are ASON network elements.
  • a virtual TE link a 301 for performing fault monitoring and participating in route calculation is configured between the optical port B.1 and the optical port C.1, and any one is configured between the optical port B.3 and the optical port C.3.
  • the virtual TE link b 302 can be configured as a virtual TE link that performs fault monitoring and participates in route calculation, and can also be configured as a virtual TE link that only performs fault monitoring and does not participate in route calculation.
  • ASON will get a multiplex section ring consisting of virtual TE links. It is assumed below that the virtual TE link b 302 is a virtual TE link that performs fault monitoring and participates in route calculation.
  • two virtual TE links that perform fault monitoring and participate in route calculation are configured between the network element B and the network element C, and the following steps are specifically included: 301.
  • the optical interface B1 is configured as a virtual TE link
  • the remote network element of the virtual TE link is set to C
  • the remote interface index is the index of the optical interface C.1.
  • the link type is used for The virtual TE link that performs the fault monitoring and participates in the route calculation, and configures the virtual TE link to include the multiplex section configuration information on the optical port B.1.
  • the link type is a virtual TE link for performing fault monitoring and participating in route calculation, and configuring the virtual TE link to include multiplex section configuration information on the optical port C.1;
  • the link type is a virtual TE link for performing fault monitoring and participating in route calculation, and configuring the virtual TE link to include multiplex section configuration information on optical port B.3;
  • the link type is a virtual TE link for performing fault monitoring and participating in route calculation, and configuring the virtual TE link to include multiplex section configuration information on optical port C.3;
  • the virtual TE link b 302 between the road a 301 and the optical port B.3 and the optical port C.3 is flooded into the ASON through the routing protocol. At this time, the ASON will discover the virtual TE link a 301 and the virtual TE link.
  • b 302 constitutes a multiplex section ring;
  • the service b 102 with the re-routing recovery attribute is set to the time slot protected by the multiplex section ring on the virtual TE link a 301, and the service b 102 actually passes through the network element B, the network element E, the network element F, and the network element C. Between the links;
  • the network element B floods the virtual TE link a 301 with the ASON message.
  • the ASON can determine that the service b 102 has been recovered. Use segment ring protection to avoid incorrect re-routing recovery for service b 102;
  • the network element B floods the ASON network with the virtual TE link b 302. At this time, the ASON network can determine the multiplex section. The ring protection has expired, thereby initiating rerouting recovery for service b 102.
  • the present invention configures at least one virtual traffic engineering TE link across the traditional optical transport network element between the two ASON network elements, and the ASON network element detects the virtual TE.
  • the method of the present invention can fully utilize the network resources of the traditional optical transport network to establish services when the network resources of the ASON are insufficient or the service is interrupted; or protect or recover the interrupted services when the fault occurs.
  • FIG. 6 is a schematic diagram of an internal structure of an ASON network element according to the embodiment.
  • the ASON network element mainly includes: a virtual TE link configuration module and a virtual TE link information release module.
  • the virtual TE link configuration module configures at least one cross-over at least one traditional optical transport network element and connects the two smart optical network networks between the two intelligent optical network NEs connected to the traditional optical transport network. a virtual TE link of the element, and acquiring the configured virtual TE link information; The virtual TE link information release module issues virtual TE link information from the virtual TE link configuration module to other network elements or path calculation units in the network.
  • the ASON network element may further include: a virtual TE link state management module, configured to receive virtual TE link information from the virtual TE link configuration module, and detect and determine the virtual according to the received virtual TE link information.
  • the virtual TE link information issuance module is further configured to issue state information of the virtual TE link from the virtual TE link state management module to other network elements or path calculation units in the network.
  • the ASON network element may further include: a virtual TE link resource allocation module, configured to locally adjust allocation of virtual TE link resources for the connection according to the received connection establishment, deletion, or modification request information, according to the received The connection establishes, deletes, or modifies the request of the virtual TE link to allocate, release, or modify the local virtual TE link resource, and notifies the virtual TE link state management module of the allocation, release, and modification result of the virtual TE link resource;
  • a virtual TE link resource allocation module configured to locally adjust allocation of virtual TE link resources for the connection according to the received connection establishment, deletion, or modification request information, according to the received
  • the connection establishes, deletes, or modifies the request of the virtual TE link to allocate, release, or modify the local virtual TE link resource, and notifies the virtual TE link state management module of the allocation, release, and modification result of the virtual TE link resource;
  • the virtual TE link state management module is further configured to update the state information of the corresponding virtual TE link according to the allocation, release, and modification result of the virtual TE link resource from the virtual TE link resource allocation module.
  • the above embodiments are all described by using ASON as an example.
  • the method of the present invention can also be applied to a hybrid network such as a traditional optical transport network and other intelligent optical networks, such as a GMPLS network.
  • a hybrid network such as a traditional optical transport network and other intelligent optical networks, such as a GMPLS network.
  • GMPLS network In the network, and its implementation is basically the same.

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Description

网络资源处理方法及智能光网络网元 技术领域
本发明涉及到传统光传送网以及智能光网络, 特别涉及到在传统光 传送网网元和智能光网絡网元混合组网的情况下, 进行网络资源处理的 方法以及一种智能光网络网元。 发明背景
包括同步数字体系 /同步光网络( SDH, Synchronous Digital Hierarchy /SONET, Synchronous Optical Network ) 以及波长交换网絡等等在内的 传统光传送网实质上是一种集中 的管理系统。 在传统光传送网中, 光 连接的创建、 维护以及拆除等操作都需要人工干预。 很显然, 这种光传 送网并不能满足数据业务快速增长对光传送网动态交换和灵活性的需 求。
为了解决上述问题, 提高光传送网的灵活性, ITU-T G.8080标准中 提出了一种自动交换光网络 ( ASON , Automatic Switching Optical Network )。 ASON在传统光传送网网絡架构的基础之上增加了一个控制 平面, 通过该控制平面, ASON可以实现光连接的自动创建、 维护以及 拆除等操作。 其中, 光连接的自动建立过程主要包括:
a: ASON中的一个网元首先通过链路局部的发现技术获得自身与其 他网元的光纤连接关系, 并将上述光纤连接中承载的用户业务的带宽资 源抽象为流量工程(TE )链路。
b: 该网元通过控制平面发布自身的状态以及抽象出的 TE链路状态 和属性信息,并接收 ASON中其他网元通过所述控制平面发布的状态信 息以及 TE链路状态和属性信息。 其中, 所述 TE链路状态表示 TE链路的实际的连通状态、 实际的告 警状态、 实际的资源占用情况等信息, 而 TE链路属性则包括诸如 TE 链路的连通属性信息、 带宽属性信息、 保护类型属性信息以及复用段环 属性信息等参数。
在步骤 b, 控制平面实质上是利用了现有的路由协议, 例如开放最 短路径优先(OSPF, Open Shortest Path First )协议, 将各个网元发布的 TE链路状态和属性信息洪泛(flooding )到 ASON中的其他网元或者某 个预先配置的路径计算单元( PCE, Path Computation Element )设备中。
c:在获得了 ASON中所有网元的状态信息以及所有的 TE链路状态 和属性信息之后, ASO 中的网元或 PCE设备均可生成一张描述当前 ASON拓朴的 "网絡地图", 该 "网络地图" 主要包括如下信息: ASON 中所有网元的信息、 TE链路的状态以及属性。
d: 当 ASON网元发起建立光连接时, 它利用自身或 PCE设备中所 确定的 "网络地图", 结合预先设定的路由算法得到一条可行的路径, 然后再通过现有信令协议驱动该路径上的网元依次建立交叉连接。
在所述光连接路径所经过的所有网元建立交叉连接后, 所述光连接 创建完成。
此后, 当 ASON中的光连接动态拆除或者由故障引起 TE链路资源 变化时, 相应的网元还需要及时向所述控制平面发布更新后的网元状态 及 TE链路的状态及属性, 实现 ASON中每个网元或 PCE设备中 "网络 地图" 的同步更新。 通过上述过程, 若 ASON发生网络故障, 例如链路 中断或网元失效时, 如果某个业务被中断, 则所述控制平面能动态地保 护或恢复该业务。 由此可以看出, ASON中的网元是具有智能的。
随着 ASON 的逐步应用, 在光传送网中将逐渐部署具有智能的 ASON网元。 然而, 现有光传送网上已经部署的网元绝大部分都是不具 备智能的传统光传送网网元, 因此在很长一段时间内, 整个光传送网上 将出现智能的 ASON 网元和非智能的传统光传送网网元混合组网的情 况。
图 1显示了由传统光传送网网元与 ASON网元组网时,在 ASON与 传统光传送网的边界常见的组网结构及业务建立方式。 其中, 网元 A、 B、 C、 D均为智能的 ASON网元, 而网元 E、 F为非智能的传统光传送 网网元。 并且,在图 1所示的网络中, 巳建立了两个业务: 从网元 B入, 不经过其它网元, 直接从网元 C出的业务 a 101; 以及从网元 B入, 经 由网元 E、 F, 从网元 C出的业务 b 102。
由于传统光传送网的网元不具备智能, 不能像 ASON网元一样自动 地动态创建、 维护以及拆除光连接, 因此, 例如图 1所示的 ASON和传 统光传送网混合组网, 发明人在发明过程发现以下问题:
1 ) 当 ASON 网络资源不足或出于特定考虑需要时, 无法利用传统 光传送网的资源建立业务或对中断的业务进行保护或恢复。
例如, 在图 1中, 当 ASON内的链路资源被耗尽时, 网元 B与网元 C之间的链路断纤, 业务 a 101将被中断, 此时, 所述系统无法利用经 由网元 B到网元 E、网元 E到网元 F及网元 F到网元 C的链路资源保护 或恢复中断的业务 a 101。
2 )当经由传统光传送网的业务中所经过的链路故障时, ASON将无 法获知该故障消息, 无法发起保护或恢复处理过程对业务进行保护或恢 复。
例如, 在图 1中业务 b 102所经过的网元 E与网元 F之间的链路断 纤时, ASON中的网元无法获知该断纤消息, 因而不能发起保护或恢复 处理过程, 业务 b 102将中断且无法保护或恢复。
在图 1中, 还可以配置网元 B-E-F-C为复用段环。 在这种情况下, 还会存在一些问题。例如若该复用段环上网元 B与网元 C之间的链路断 纤, 业务 a 101将会受到复用段环的保护, 不需要进行保护或恢复, 但 在现有的方法中, ASON网元受网元 B与网元 C之间链路断纤的触发会 检查复用段环连通状态, 发现该复用段环残缺, 就会错误判断复用段环 保护失效, 从而错误地对业务 a 101发起保护或恢复。 而当环上网元 E 到网元 F、 网元 B到网元 C之间链路先后断纤时, 会导致业务 b 102中 断, 需要进行保护或恢复, 但此时 ASON不知道业务 b 102倒换经过网 元 B与网元 C之间的链路, 故未能对业务 b 102发起保护或恢复, 导致 业务 b 102无法保护或恢复。 发明内容
为了解决上述问题, 本发明实施例提供了一种网络资源的处理方法 和智能光网络网元, 可以充分、 合理地利用传统光传送网和智能光网络 的网络资源, 实现网络资源的动态分配。
本发明实施例所实施的网络资源处理方法, 适用于传统光传送网网 元和智能光网络网元混合组网的网络中, 该方法需要在和传统光传送网 相连的两个智能光网络网元之间配置至少一条且跨过至少一个传统光 传送网网元并连接所述两个智能光网络网元的虚拟流量工程链路; 每个 和传统光传送网相连的智能光网络网元分别获取经过传统光传送网连 接到另一智能光网络网元的虛拟流量工程链路信息, 并在智能光网络中 发布获取的所述虛拟流量工程链路信息。
本发明实施例所实施的另一种网络资源处理方法, 在和传统光传送 网相连的两个智能光网络网元之间配置至少一条且跨过至少一个传统 光传送网网元并连接所述两个智能光网絡网元的参与路由计算的虚拟 流量工程链路; 在传统光传送网网元上预留对应于所述虚拟流量工程链 路的带宽资源, 并在预留带宽资源上建立交叉连接; 每个和传统光传送 网相连的智能光网络网元分别获取经过传统光传送网连接到另一智能 光网络网元的虚拟流量工程链路信息, 并在智能光网络中发布获取的所 述虚拟流量工程链路信息。
本发明实施例所实施的又一种网络资源处理方法, 在和传统光传送 网相连的两个智能光网絡网元之间配置至少一条且跨过至少一个传统 光传送网网元并连接所述两个智能光网络网元的用于故障监控的虚拟 流量工程链路; 在智能光网络网元上对所述虚拟流量工程链路启动故障 监控并获取故障状态信息; 每个和传统光传送网相连的智能光网絡网元 分别获取经过传统光传送网连接到另一智能光网络网元的虚拟流量工 程链路信息, 并在智能光网络中发布获取的所述虚拟流量工程链路以及 故障状态信息。
本发明实施例所实施的再一种网络资源处理方法, 在和传统光传送 网相连的两个智能光网络网元之间配置至少一条且跨过至少一个传统 光传送网网元并连接所迷两个智能光网络网元的用于故障监控且参与 路由计算的虛拟流量工程链路; 所述方法包括: 在传统光传送网网元上 预留对应于所述虚拟流量工程链路的带宽资源 , 并在预留带宽资源上建 立交叉连接; 在智能光网络网元上对所述虚拟流量工程链路启动故障监 控并获取故障状态信息; 每个和传统光传送网相连的智能光网络网元分 别获取经过传统光传送网连接到另一智能光网络网元的虚拟流量工程 链路信息, 并在智能光网络中发布获取的所述虚拟流量工程链路以及故 障状态信息。
本发明实施例所提供的智能光网络网元, 包括: 虚拟 TE链路配置 模块, 用于在和传统光传送网相连的两个智能光网络网元之间配置至少 一条且跨过至少一个传统光传送网网元并连接所述两个智能光网络网 元的虚拟 TE链路, 并获取所配置的虚拟 TE链路信息; 虚拟 TE链路信 息发布模块,用于将来自虚拟 TE链路配置模块的虚拟 TE链路信息向网 络中的其它网元或路径计算单元发布。
由此可以看出, 在本发明实施例所述方法中, 通过将与智能光网络 相连接的传统光传送网的网络资源抽象成虚拟 TE链路, 在智能光网络 的网络资源不足或出于特定考虑需要时, 虚拟 TE链路和在智能光网络 内部配置的普通 TE链路一样进行动态分配, 因此, 本发明所述的方法 可以利用传统光传送网的网络资源建立或维护业务。
另外, 通过由位于智能光网络与传统光交换网边界的网元监测虚拟 TE链路的状态变化,并可以将虚拟 TE链路的状态变化发布到智能光网 络中, 这样 , 智能光网络网元可以及时发现在虚拟 TE链路对应光口以 及虚拟 TE链路上发生的故障, 并采用相应的措施对受故障影响的业务 进行保护或恢复。 附图简要说明
此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的 一部分, 并不构成对本发明的限定。 在附图中:
图 1为显示了由传统光传送网网元与 ASON网元組网时, 在 ASON 与传统光传送网边界常见的组网结构及业务建立方式的示意图;
图 2为本发明一实施例所述网络资源处理方法的流程图;
图 3为本发明一实施例在图 1所示的组网结构中建立虚拟 TE链路 的示意图;
图 4为本发明一实施例所述 TE链路类型标识 TLV的帧格式示意图; 图 5为本发明一实施例 3所述的組网结构以及维护虚拟 TE链路的 方法示意图; 图 6为本发明一实施例所述 ASON网元的内部结构示意图。 实施本发明的方式
为使发明的目的、 技术方案及优点更加清楚明白, 以下参照附图并 举实施例, 对本发明作进一步详细说明。 在此, 本发明的示意性实施例 及其说明用于解释本发明, 但并不作为对本发明的限定。
本发明的实施例提供了一种在传统光传送网网元和智能光网络网元 混合组网的情况下, 对网絡资源进行处理的方法。 在此所述的智能光网 络, 通常表现为在传统光网络中通过引入控制平面来实现对光网络中光 连接灵活调度的网络, 例如包括 ASON 以及通用多协议标签交换 ( GMPLS ) 网络等。
下面以 ASON网元与传统光传送网网元的混合组网为例 ,详细说明 本实施例所述的方法。 图 2显示了在 ASON网元与传统光传送网网元的 混合组网的情况下, 对网絡资源进行处理的过程。 如图 2所示, 所述方 法主要包括以下步骤:
A、 预先在和传统光传送网相连的两个 ASON网元之间配置至少一 条跨过至少一个传统光传送网网元并连接所述两个 ASON 网元的虚拟 TE链路;
其中, 每条所述虚拟 TE链路为经过至少一个传统光传送网网元并 且链路的两端为 ASON网元的逻辑链路,所述逻辑链路通常表现为在两 个网元之间指定的逻辑上相连的链路。 通常包括但不限于如下两种情 况:
1、由跨过至少一个传统光传送网网元的一条或多条光连接构成的链 路;
2、 由在传统光传送网中具有某种共同属性(如复用段环属性)的多 段实际 TE链路串连构成的链路。
本步骤所述在一对 ASON网元之间配置虚拟 TE链路的具体步骤包 括: 在需要配置虚拟 TE链路的一对 ASON网元与传统光传送网对接的 两个光口上分别配置虚拟 TE链路, 将这两个光口相互设置为各自所配 置虛拟 TE链路的远端接口, 并将这两个光口所在的 ASON网元相互设 置为各自所配置虚拟 TE链路的远端网元。
在 ASON网元之间配置的虚拟 TE链路可以包括以下两种链路类型:
1 )在 ASON网元与传统光传送网对接的光口之间配置参与路由计 算的虚拟 TE链路;
对于这种类型的虚拟 TE链路,还需要在利用该虚拟 TE链路建立光 连接之前在传统光传送网网元上预留对应于该虚拟 TE链路的带宽资 源, 并在预留的带宽资源上建立交叉连接。 在这里所述的带宽资源可以 包括: 时隙资源、 波长资源、 子波长资源或波段资源等等。 上述参与路 由计算的虚拟 TE链路还可以用于进行故障监控。 需要说明的是, 在传 统光传送网上为所配置的虚拟 TE链路预留带宽资源并建立交叉连接的 时间顺序可以灵活确定, 既可以在配置所述虚拟 TE链路之前进行, 也 可以在配置所述虚拟 TE链路之后进行, 而均不会超出本发明意欲保护 的范围。
2 )在 ASON网元与传统光传送网对接的光口之间配置仅进行故障 监控而不参与路由计算的虚拟 TE链路。
此时, 在传统光传送网网元上不需要必须预留对应于虚拟 TE链路 的带宽资源, 当然也不需要必须建立交叉连接。
图 3为本发明一实施例在图 1所示的组网结构中建立虚拟 TE链路 的示意图, 如图 3所示, 虚拟 TE链路 201将在 ASON网元与传统光传 送网网元对接的光口之间, 即光口 B.1和光口 C.1之间配置, 如图 3中 2006/003518 的虚线所示。 如果配置该虚拟 TE链路 201为可以配置为参与路由计算 的虚拟 TE链路, 则还需要进一步在传统光传送网网元中为该虚拟 TE 链路预留对应于虚拟 TE链路的带宽资源并建立交叉连接。 如果配置该 虚拟 TE链路 201为仅进行故障监控而不参与路由计算的虚拟 TE链路, 则不需要在传统传送网网元中为该虚拟 TE链路预留对应的带宽资源, 当然也不可能建立交叉连接。
需要说明的是, ASO 所配置的虚拟 TE链路的时隙和带宽属性可 以在物理光口实际支持的范围内灵活配置, 而不需要和物理光口的类型 完全一致, 并且所述虚拟 TE链路两端光口的物理类型也可以不相同。 例如在图 3中,若光口 B.1和光口 E.2均为 64 VC4时隙的光口, 而光口 E.l、 F.l、 F.2和 C.1均为 16 VC4时隙的光口, 则在光口 B.1和光口 C.1 之间可以配置带宽范围为 1〜16 VC4时隙的虚拟 TE链路。
另外, 如果在传统光传送网中配置了复用段环, 或在传统光传送网 与 ASON的边界配置了跨越 ASON和传统光传送网的复用段环,则还需 要将传统光传送网部分的复用段环配置信息映射为虚拟 Ί;Ε链路属性中 的复用段环属性信息, 即在所配置的虚拟 ΤΕ链路属性中的复用段环属 性信息中标识该虚拟 ΤΕ链路对应于一个复用段环的某个部分。
Β>与虚拟 ΤΕ链路相连的 ASON网元获取所述虚拟 TE链路的虚拟 TE链路信息, 并进一步检测所述虚拟 TE链路的状态信息。
所述虚拟 TE链路信息包括:虚拟 TE链路的类型以及相关属性信息。 其中, 所述虚拟 TE链路的属性包括诸如链路类型信息、 带宽信息、 保 护类型信息以及复用段环属性信息等参数。
所述虚拟 TE链路的状态包括其实际的连通状态、 实际的告警状态 信息、 实际的资源占用情况等等。
C、与虚拟 TE链路相连的 ASON网元将所获取的虚拟 TE链路信息 及其相关的状态信息发布到整个 ASON。
本步骤所述的发布包括:与虚拟 TE链路相连的 ASON网元向 ASON 发布虚拟 TE链路信息及其相关的状态信息; ASON利用了现有的路由 协议, 例如 OSHF协议, 将各个网元发布的虚拟 TE链路信息及其状态 信息洪泛到 ASON中的其他网元或者 PCE设备中。 ·
需要说明的是, 若所确定的虚拟 TE链路对应一个跨越 ASO 和传 统光传送网的复用段环中传统光传送网部分时, 在该虚拟 TE链路属性 中的复用段环属性信息被洪泛到整个 ASON后,结合 ASON内部所发布 的 ASON网元间链路的复用段环配置信息, ASON中的所有网元或网络 中的 PCE设备都将保存完整的复用段环信息。
若所确定的虚拟 TE链路对应一个传统光传送网复用段环的部分时 , 在该虚拟 TE链路属性中的复用段环属性信息被洪泛到整个 ASON后, 结合 ASON发布的对应该复用段环另外部分的虚拟 TE链路的复用段环 配置信息, ASON中的所有网元或网络中的 PCE设备也可以保存完整的 复用段环信息。
在上述洪泛过程中, 为使 ASON中的网元能够区分出普通的 TE链 路和虚拟 TE链路, 本发明的一实施例对 ASON中将用于对网元信息以 及 TE链路及其相关信息进行洪泛时采用的 OSPF路由协议进行了扩展, 在由规程 RFC 3630和 RFC 4203定义的链路 ( link ) TE链路类型标识 ( TLV )及包含的二级 TLV之外,增加新的属于 link TLV的一个二级子 TLV, 称为 TE类型标识 TLV, 由该 TE类型标识 TLV的值字段标识此 link TLV描述的 TE链路是普通 TE链路还是虚拟 TE链路。 图 4为本发 明一实施例所述 TE链路类型标识 TLV的帧格式示意图, 如图 4所示, 所述新增 TE类型标识 TLV的帧格式中,包含 4字节的 TLV头部:其中, 2个字节为 TLV类型(Type )字段,配置取值为 0x1001 ; 2个字节为 TLV 长度(Length )字段, 配置取值为 4。 除 TLV头部外, 还包括值(Value ) 部分占 4字节, 目前定义了如下 3种可能的取值:
Value = 0, 标识普通 TE链路;
Value = 1 , 标识参与路由计算的虚拟 TE链路;
Value = 2, 标识仅进行故障监控而不参与路由计算的虛拟 TE链路。 这样,在 ASON网元或网络中的 PCE设备接收到已发布的 TE链路 以及相关的状态和属性信息后, 就可以通过其中 link TLV中新增的二级 子 TLV识别出该 TE链路是普通的 TE链路还是虚拟 TE链路, 如果是 虚拟 TE链路还可以进一步识别出是参与路由计算的虚拟 TE链路还是仅 进行故障监控而不参与路由计算的虚拟 ΊΈ链路。
D、 所有 ASON网元或网络中的 PCE设备根据获得的虚拟 TE链路 及其相关的状态和属性信息以及其他网元的信息以及所有普通 TE链路 的相关的状态和属性信息, 生成一张描述当前 ASON拓朴的 "网络地 图", 又称为 ASON拓朴图。
如前所述, 所述 ASON拓朴图中主要包括: ASON中所有网元的信 息、 TE链路的实际连通状态、 实际告警状态信息、 实际的资源占用情 况, 包括诸如链路类型信息、 带宽信息、 保护类型信息以及复用段环信 息等参数在内的 TE链路的属性信息。在这里所述的 TE链路所指的既可 以是普通 TE链路还可以是虚拟 TE链路。
E、 当某个 ASON网元发起建立光连接时, 它利用自身或 PCE设备 中生成的 ASON拓朴图, 结合预先确定的路由算法得到可行的路径, 该 路径可能会经过所确定的虚拟 TE链路或者和所确定的虚拟 TE链路相 关 , 然后再通过现有信令协议驱动该路径上的网元依次建立交叉连接, 创建所述光连接。
由此可以看出, 通过上述步骤 A ~ E, 可以在传统光传送网网元以 及 ASON网元混合组网的情况下, 实现光连接的自动动态创建。 另外, 由于与 ASON相连接传统光传送网的网络资源被抽象成虚拟 TE链路, 因此, 当 ASON网絡资源不足或出于特定考虑需要时, 可以利用传统光 传送网的资源建立业务。
为了在传统光传送网网元以及 ASON网元混合组网的情况下进一步 实现对所建立光连接的维护, 在上述步骤 D之后, 还可以执行如下两个 步骤。 其中, 所述维护包括对建立的光连接进行故障监测, 在故障发生 时, 对中断的业务进行保护或恢复等等。
其中, 所述保护, 通常表现为业务中断时, ASON利用具有保护属 性的业务所预先分配的备用资源保护所述中断的业务, 例如 1+1保护; 所述恢复, 通常表现为业务中断时, ASON利用网络空闲的资源为 具有恢复属性的业务重新分配资源来恢复所述中断的业务, 例如重路由 恢复。
F、位于 ASON与传统光交换网边界的网元监测虚拟 TE链路的状态 变化, 并将虚拟 TE链路的状态变化信息实时发布到整个 ASON。
该步骤所述的发布方法与步驟 C所用的方法相同, 包括:与虚拟 TE 链路相连的 ASON网元向 ASON发布虚拟 TE链路及其相关的状态和属 性信息; ASON通过现有的路由协议, 例如 OSPF协议, 将所发布的虚 拟 TE链路状态和属性信息洪泛到 ASON中的其他网元或者 PCE设备 中。
该步骤所述虚拟 TE链路的状态变化包括:所述虚拟 TE链路对应光 口的状态变化。
例如在图 3中, 在光口 B.1和光口 C.1之间配置虚拟 TE链路 201 后, 若光口 B.1或光口 C.1发生故障, 则光口 B.1或光口 C.1上的告警 状态将直接反映到虚拟 TE链路 201的两端接口上, 从而 ASON网元 B 和 /或 C将向 ASON发布当前虛拟 TE链路 201的状态。
若故障发生在传统光传送网网元之间的链路, 例如网元 E与网元 F 之间的链路上, 由于这些链路对 ASON来说是透明的, 因此只有存在业 务经过这样的链路时,位于 ASON与传统光交换网边界的网元才能检测 到传统光传送网网元之间的链路断纤或通道告警, 此后, 位于 ASON与 传统光交换网边界的网元会发布当前虚拟 TE链路 201的状态。
以图 3中的业务 b 102为例,当网元 E到网元 F之间的链路断纤时, 位于 ASON与传统光交换网边界的网元 .B和 C将检测到该业务 b 102有 断纤告警或通道告警, 然后通过通道故障定位过程定位出虚拟 TE链路 201上有故障, 然后再由网元 B和 /或网元 C发布当前虚拟 TE链路 201 的状态。
G、 ASON根据虚拟 TE链路的状态变化对相应业务受到的影响进行 判断, 确定业务当前通断状态, 并采取相应的处理。
本步骤所述相应处理主要包括:
对于没有配置复用段环的情况, 如果检测到所述虚拟 TE链路上发 生断纤或者有通道告警, 则判定该虚拟 TE链路为关闭 (DOWN )状态 不可用, 此时, 若经过其上的业务如果具有保护或恢复属性, 则 ASON 就对该业务发起对应的保护或恢复处理;
对于配置了复用段环的情况, 如果检测到所述虚拟 TE链路上发生 断纤或者有通道告警, 则首先利用现有的方法判断该复用段环是否已经 保护了经过该复用段环的业务, 如果没有被保护并且业务具有保护或恢 复属性, ASON就对该业务进行保护或恢复处理, 否则, 就不发起保护 或恢复处理。
通过上述步骤 F ~ G, ASON中的网元可以及时发现在虚拟 TE链路 上发生的故障, 并采用相应的措施对中断的业务进行保护或恢复。 下面将结合附图通过具体的实施例详细举例说明本发明的方法。 实施例 1: 使用参与路由计算的虚拟 TE链路的方法。
参照图 3 , 4艮设欲将网元 B与网元 E、 网元 E与网元 F、 网元 F与 网元 C之间链路的 1至 16号 VC4时隙配置为一个虚拟 TE链路的带宽 资源。
本实施例在使用 TE链路之前, 需要预先在网元 B和网元 C之间配 置用于进行故障监控且参与路由计算的虛拟 TE链路, 具体包括以下步 骤:
101、 在网元 B和网元 C上分别设置光口 B.1和 C.1上 1至 16号 VC4时隙为预留状态, 并在网元 E和网元 F上分别建立光口 E.1和 E.2 之间、 F.1和 F.2之间 1至 16号 VC4时隙的交叉连接;
102、 在网元 B上配置光口 B.1为虚拟 TE链路, 其带宽资源为光口 B.1的 1至 16号 VC4时隙,并配置该虚拟 TE链路的远端网元为网元 C, 其远端接口索引为光口 C.1的索引, 其链路类型为用于进行故障监控且 参与路由计算的虚拟 TE链路;
103、 同样在网元 C上配置光口 C.1为虚拟 TE链路, 其带宽资源为 光口 C.1的 1至 16号 VC4时隙, 并配置该虚拟 TE链路的远端网元为 网元 B, 其远端接口索引为 B.1的索引, 其链路类型为参与路由计算的 虚拟 TE链路。
在虚拟 TE链路配置完成后 , 执行以下步驟:
104、 网元 B和 C在确定了在它们之间预先配置的虚拟 TE链路之 后, 将该虚拟 TE链路及其状态和属性信息通过路由协议洪泛到 ASON 中;
'如前所述, 所述 TE链路的状态信息包括: 网元检测到的 TE链路实 际连通状态、 实际告警信息、 实际时隙资源的占用情况等等。 所述 TE链路的属性具体包括: 链路类型信息、 TE链路带宽信息、 保护类型信息以及复用段环信息等等;
105、 当需要创建业务或重路由恢复时,业务路由计算将使用该虚拟 TE链路建立或重路由业务;
该步骤具体包括: 当建立业务 b 102的信令过程走到网元 B或网元 C时, 信令控制建立预留的光口 B.1和光口 C.1之间的 1至 16号 VC4 时隙资源中的一个时隙和本网元面向 ASON 网络的光口中的另外一个 时隙之间的交叉连接。 这样,在 ASON看来, 业务 b 102经过了虚拟 TE 链路 ^ '
106、如果在后续过程中网元 B到网元 E之间发生断纤,则光口 B.1 会检测到故障,此时,网元 B将设置虚拟 TE链路的连通状态为 DOWN, 并通过路由协议向 ASON洪泛该虚拟 TE链路的连通状态, 从而可在业 务 b 102具有重路由恢复属性时触发对业务 b 102的重路由恢复, 此时, 业务路由计算将排除该故障虚拟 TE链路,计算出另一条业务恢复路径; 需要说明的是, 在网元 C到网元 F之间发生的断纤也会引发类似的 处理过程;
107、如果不是和虚拟 TE链路相连的 ASON网元的光口所连接的光 纤断纤, 则与传统光传送网连接的 ASON网元将检测不到故障, 例如: 在网元 E到网元 F之间发生断纤时, 网元 B和网元 C均检测不到故障。 此时由于由虚拟 TE链路承载的业务 b 102中断,业务 b 102路径上的网 元会检测到通道故障, 这时业务 b 102创建的首个网元将发起通道告警 故障定位过程, 并将定位出故障位于虚拟 TE链路上, 从而发起排除虚 拟 TE链路的重路由恢复过程, 使业务 b 102得到恢复。
实施例 2: 在传统光传送网与 ASON的边界配置了跨越 ASON和传 统光传送网的复用段环的情况下, 使用仅进行故障监控而不参与路由计 算的虚拟 TE链路。
参照图 3, 假设在网元 B、 网元 E、 网元 F及网元 C之间配置了 2 纤双向复用段环,在 ASON内只包含上述复用段环中经过光口 B.2-光口 C.2部分的信息, 而不包括上述复用段换中网元 B和网元 C之间经由网 元 E和网元 F构成的部分, 这时可以在光口 B.1和光口 C.1之间配置一 条的仅进行故障监控而不参与路由计算的虚拟 TE链路, 用来描述上述 复用段换中网元 B和网元 C之间经由网元 E和网元 F构成的部分, 使 得 ASON可以得到一个复用段环。
本实施例在使用上述虚拟 TE链路之前需要预先在网元 B和网元 C 之间配置一条仅进行故障监控而不参与路由计算的虛拟 TE链路, 具体 包括以下步骤:
201、 在网元 B上配置光口 B.1为虚拟 TE链路, 并配置该虚拟 TE 链路的远端网元为网元 C, 远端接口索引为光口 C.1的索引, TE链路类 型为仅进行故障监控而不参与路由计算的虛拟 TE链路, 同时该虚拟 TE 链路包含光口 B.1上的复用段配置信息;
202、 同样地, 在网元 C上配置光口 C.1为虚拟 TE链路, 配置该虛 拟 TE链路的远端网元为网元 B, 远端接口索引为光口 B.1的索引, TE 链路类型为仅进行故障监控而不参与路由计算的虚拟 TE链路, 同时该 虚拟 TE链路包含光口 C.1上的复用段配置信息;
在上述虚拟 TE链路配置完成后 , 执行以下步骤:
203、 网元 B和网元 C在确定了在它们之间预先配置的虚拟 TE链 路之后,将该虚拟 TE链路及其相关信息通过路由协议洪泛到 ASON中, ASON将发现光口 B.2到光口 C.2之间的实际 TE链路和光口 B.1到光口 C.1之间的虚拟 TE链路组成了一个复用段环;
204、 如果光口 B.2和光口 C.2之间发生断纤, 由于光口 B.2到光口 C.2之间的实际 TE链路和光口 B.1到光口 C.1之间的虚拟 TE链路组成 了一个复用段环, 因此, 可以判断出图 3所示的业务 a 101受到了该复 用段环的保护, 从而不需要对业务 a 101进行保护或恢复, 从而有效地 避免现有方法中, 错误地对业务 a 101发起保护或恢复处理的情况;
205、 后续地, 若网元 B和网元 E之间也发生了断纤, 则光口 B.1 会检测到该故障, 此时, 网元 B 将设置虚拟 TE链路的连通状态为 DOWN, 并通过路由协议向 ASON洪泛该 TE链路当前的连通状态, 此 时, ASON可判断出复用段环保护已经失效, 从而对业务 a 101发起保 护或恢复。
实施例 3: 在传统光传送网中配置了复用段环的情况下, 使用虚拟 TE链路。
图 5为本实施例 3所述的组网结构以及维护虛拟 TE链路的方法示 意图, 如图 5所示, 在网元 A、 B、 E、 F、 C、 D之间配置了 2纤双向复 用段环, 如图 5中粗实线所示, 即整个复用段环经过 ASON中的两个节 点并且该复用段环的两个半环都在传统网络内, 其中, 网元 A、 D、 E 和 F为传统光传送网网元, 而网元 B和 C为 ASON网元。 这时在光口 B.1和光口 C.1之间配置用于进行故障监控且参与路由计算的虚拟 TE链 路 a 301 , 在光口 B.3和光口 C.3之间配置任意一种虚拟 TE链路 b 302, 既可以配置为进行故障监控且参与路由计算的虚拟 TE链路, 也可以配 置为仅进行故障监控而不参与路由计算的虚拟 TE链路。 此时, ASON 将得到一个由虚拟 TE链路构成的复用段环。下面假设虚拟 TE链路 b 302 为进行故障监控且参与路由计算的虚拟 TE链路。
本实施例在使用上述虚拟 TE链路之前, 需要预先在网元 B和网元 C之间配置两条进行故障监控且参与路由计算的虚拟 TE链路, 具体包 括以下步骤: 301、 在网元 B上配置光口 B.l为虚拟 TE链路, 配置该虚拟 TE链 路的远端网元为 C, 远端接口索引为光口 C.1的索引, 链路类型为用于 进行故障监控且参与路由计算的虚拟 TE链路, 同时, 配置该虚拟 TE 链路包含光口 B.1上的复用段配置信息;
302、 在网元 C上配置光口 C.1为虚拟 TE链路, 配置该虚拟 TE链 路的远端网元为 8, 远端接口索引为光口 B.1的索引, 链路类型为用于 进行故障监控且参与路由计算的虚拟 TE链路, 同时, 配置该虚拟 TE 链路包含光口 C.1上的复用段配置信息;
303、 在网元 B上配置光口 B.3为虚拟 TE链路, 配置该虚拟 TE链 路的远端网元为 C, 远端接口索引为光口 C.3的索引, 链路类型为用于 进行故障监控且参与路由计算的虚拟 TE链路, 同时, 配置该虚拟 TE 链路包含光口 B.3上的复用段配置信息;
304、 在网元 C上配置 C.3光口为虚拟 TE链路, 配置该虚拟 TE链 路的远端网元为 B, 远端接口索引为光口 B.3的索引, 链路类型为用于 进行故障监控且参与路由计算的虚拟 TE链路, 同时, 配置该虚拟 TE 链路包含光口 C.3上的复用段配置信息;
305、 在网元 B和网元 C上分别设置光口 B.1和 C.1上 1至 16号 VC4时隙为预留状态, 并在网元 E和网元 F上分别建立光口 E.1和 E.2 之间、 R1和 F.2之间 1至 16号 VC4时隙的交叉连接;
306、 在网元 B和网元 C上分别设置光口 B.3和 C.3上 1至 16号 VC4时隙为预留状态,并在网元 A和网元 D上分别建立光口 A.1和 A.2 之间、 D.1和 D.2之间 1至 16号 VC4时隙的交叉连接。
在上述虚拟 TE链路配置完成后, 执行以下步驟:
307、 网元 B和 /或网元 C在确定了它们之间存在的虚拟 TE链路之 后, 将所确定的虚拟 TE链路, 即光口 B.1和光口 C.1之间的虚拟 TE链 路 a 301及光口 B.3和光口 C.3之间的虚拟 TE链路 b 302, 通过路由协 议洪泛到 ASON中, 此时, ASON将发现虛拟 TE链路 a 301和虚拟 TE链路 b 302组成了一个复用段环;
308、建立具有重路由恢复属性的业务 b 102经过虛拟 TE链路 a 301 上受到复用段环保护的时隙, 业务 b 102实际经过网元 B、 网元 E、 网 元 F和网元 C之间的链路;
309、如果网元 B到网元 E的链路发生断歼故障,则网元 B向 ASON 洪泛虚拟 TE链路 a 301断纤的消息,此时, ASON可以判断出业务 b 102 受到了复用段环的保护, 从而避免对业务 b 102错误发起重路由恢复;
310、 当网元 B到网元 A的链路随后也发生断纤故障, 则网元 B向 ASON洪泛虚拟 TE链路 b 302断纤的消息,此时, ASON网络可判断出 复用段环保护已经失效, 从而对业务 b 102发起重路由恢复。
从上述三个实施例可以看出, 本发明通过在两个 ASON网元之间配 置至少一条跨过传统光传送网网元的虚拟流量工程 TE链路,所述 ASON 网元检测所述虚拟 TE链路的状态, 并在 ASON中进行发布。 利用本发 明方法可以在 ASON的网络资源不足或业务中断的情况下,充分利用传 统光传送网的网络资源建立业务; 或在故障发生时, 对中断的业务进行 保护或恢复。
本发明的一实施例还给出了实现上述实施例的 ASON网元。 图 6为 本实施例所述 ASON网元的内部结构示意图, 如图 6所示, 所述 ASON 网元主要包括: 虚拟 TE链路配置模块、 虚拟 TE链路信息发布模块。
其中, 所述虚拟 TE链路配置模块在和传统光传送网相连的两个智 能光网络网元之间配置至少一条跨过至少一个传统光传送网网元并连 接所述两个智能光网络网元的虚拟 TE链路, 并获取所配置的虛拟 TE 链路信息; 虚拟 TE链路信息发布模块将来自虚拟 TE链路配置模块的虛拟 TE 链路信息向网络中的其它网元或路径计算单元发布。
所述 ASON网元还可以进一步包括: 虚拟 TE链路状态管理模块, 用于接收来自虚拟 TE链路配置模块的虚拟 TE链路信息,根据所接收的 虚拟 TE链路信息检测并确定所述虚拟 TE链路所对应的传统光网络和智 能光网络之间的物理资源的所述虚拟 TE链路状态信息。
此时, 所述虚拟 TE链路信息发布模块将进一步用于将来自虚拟 TE 链路状态管理模块的虚拟 TE链路的状态信息向网络中的其它网元或路 径计算单元发布。
所述 ASON网元还可以进一步包括: 虚拟 TE链路资源分配模块, 用于根据接收到的连接建立、 删除或修改请求信息在本地为该连接调整 虚拟 TE链路资源的分配, 根据所接收的连接建立、 删除或修改虚拟 TE 链路的请求分配、 释放或修改本地的虚拟 TE链路资源, 并将虚拟 TE 链路资源的分配、 释放以及修改结果通知所述虚拟 TE链路状态管理模 块;
此时, 所述虚拟 TE链路状态管理模块将进一步用于根据来自虚拟 TE链路资源分配模块的虚拟 TE链路资源的分配、释放以及修改结果更 新对应虚拟 TE链路的状态信息。
需要说明的是, 以上实施例均是以 ASON为例进行说明的, 除此之 外, 本发明所述的方法还可以应用到传统光传送网与其他智能光网络, 例如 GMPLS网络等混合组网的网络中, 并且其实现方法基本相同。
以上所述仅为本发明的实施例而已, 并不用以限制本发明, 凡在本 发明的精神和原则之内, 所作的任何修改、 等同替换、 改进等, 均应包 含在本发明的保护范围之内。

Claims

权利要求书
1、一种网络资源处理方法,适用于传统光传送网网元和智能光网络 网元混合组网的网络中, 其特征在于, 在和传统光传送网相连的两个智 能光网络网元之间配置至少一条且跨过至少一个传统光传送网网元并 连接所述两个智能光网络网元的虛拟流量工程链路, 所述方法包括: 每个和传统光传送网相连的智能光网络网元分别获取经过传统光传 送网连接到另一智能光网络网元的虚拟流量工程链路信息, 并在智能光 网络中发布获取的所述虚拟流量工程链路信息。
2、 才艮据权利要求 1所述的方法, 其特征在于,
所述获取虚拟流量工程链路信息包括: 获取虚拟流量工程链路的类 型以及属性信息;
发布所述虚拟流量工程链路信息的步骤具体包括: 将获取的所述虚 拟流量工程链路类型以及属性信息在所述智能光网络中发布。
3、根据权利要求 2所述的方法, 其特征在于, 所述虚拟流量工程链 路的属性信息包括: 所述虚拟流量工程链路的链路类型、 带宽信息、 保 护类型信息以及复用段环信息。
4、根据权利要求 2或 3所述的方法, 其特征在于, 所述虚拟流量工 程链路的类型为参与路由计算的虚拟流量工程链路;
所述方法进一步包括: 在传统光传送网网元上预留对应于所述虚拟 流量工程链路的带宽资源, 并在预留带宽资源上建立交叉连接。
5、根据权利要求 2或 3所述的方法, 其特征在于, 所述虚拟流量工 程链路的类型为仅进行故障监控而不参与路由计算的虚拟流量工程链 路。
6、 根据权利要求 1所述的方法, 其特征在于,
获取所述虚拟流量工程链路信息的步骤具体包括: 所述智能光网络 检测所述虛拟流量工程链路的状态信息;
发布所述虛拟流量工程链路信息的步骤具体包括: 将所述虚拟流量 工程链路的状态信息在所述智能光网络中发布。
7、根据权利要求 6所述的方法, 其特征在于, 所述虚拟流量工程链 路的状态包括: 虛拟流量工程链路的实际连通状态、 实际告警状态及实 际资源占用情况。
8、根据权利要求 1所述的方法, 其特征在于, 在发布所述虚拟流量 工程链路信息之后进一步包括:
所述智能光网络中所有智能光网络网元或路径计算单元设备根据获 得的所述虚拟流量工程链路信息及其他网元的信息以及所有普通流量 工程链路相关信息结合预先确定的路由算法得到可行的路径;
所述智能光网络中的智能光网络网元驱动所述路径上的网元依次建 立交叉连接, 建立光连接。
9、根据权利要求 8所述的方法, 其特征在于, 在建立所述光连接之 后进一步包括:
位于所述智能光网络与传统光传送网边界的智能光网络网元监测所 述虚拟流量工程链路上是否发生断纤或者是否有通道告警的状态变化, 并将变化信息发布到整个智能光网络;
如果检测到所述虚拟流量工程链路上发生断纤或者有通道告警, 若在传统光传送网和智能光网络的边界上没有配置复用段环, 则判 定所述虚拟流量工程链路为关闭状态不可用, 若经过所述虚拟流量工程 链路上的业务如果具有保护或恢复属性, 则所述智能光网絡就相应地对 该业务发起保护或恢复处理;
若在所述传统光传送网和智能光网络的边界上配置有复用段环, 则 首先判断所述复用段环是否已经保护了经过该复用段环的业务, 如果没 有被保护并且中断的业务具有保护或恢复属性, 就相应地对该业务进行 保护或恢复处理, 否则, 就不发起保护或恢复处理。
10、 根据权利要求 9所述的方法, 其特征在于,
所述对业务进行保护处理具体包括:在具有保护属性的业务中断时, 所述智能光网络利用为具有保护属性的业务预先分配的备用资源来保 护所述中断的业务;
所述对业务进行恢复处理具体包括:在具有恢复属性的业务中断时, 所述智能光网络利用网络空闲的资源为具有恢复属性的业务重新分配 资源来恢复所述中断的业务。
11、 根据权利要求 1所述的方法, 其特征在于, 所述智能光网.絡中 的网元通过扩展的开放最短路径优先协议中新增流量工程链路类型标 识区分普通的流量工程链路和虚拟流量工程链路。
12、根据权利要求 11所述的方法, 其特征在于, 所述流量工程链路 类型标识包含 4字节的流量工程链路类型标识头部和 4字节的用于标识 流量工程链路类型的值部分, 在所述流量工程链路类型标识头部中, 2 个字节为流量工程链路类型标识类型字段, 2个字节为流量工程链路类 型标识长度字段。
13、 一种网络资源处理方法, 适用于传统光传送网网元和智能光网 络网元混合组网的网络中, 其特征在于, 在和传统光传送网相连的两个 智能光网络网元之间配置至少一条且跨过至少一个传统光传送网网元 并连接所述两个智能光网絡网元的参与路由计算的虚拟流量工程链路; 所述方法包括:
在传统光传送网网元上预留对应于所述虚拟流量工程链路的带宽资 源, 并在预留带宽资源上建立交叉连接;
每个和传统光传送网相连的智能光网络网元分别获取经过传统光传 送网连接到另一智能光网络网元的虚拟流量工程链路信息, 并在智能光 网络中发布获取的所述虚拟流量工程链路信息。
14、 一种网络资源处理方法, 适用于传统光传送网网元和智能光网 络网元混合组网的网络中, 其特征在于, 在和传统光传送网相连的两个 智能光网络网元之间配置至少一条且跨过至少一个传统光传送网网元 并连接所述两个智能光网络网元的用于故障监控的虚拟流量工程链路; 所述方法包括:
在智能光网络网元上对所述虚拟流量工程链路启动故障监控并获取 故障状态信息;
每个和传统光传送网相连的智能光网络网元分别获取经过传统光传 送网连接到另一智能光网络网元的虚拟流量工程链路信息, 并在智能光 网络中发布获取的所述虚拟流量工程链路以及故障状态信息。
15、 一种网络资源处理方法, 适用于传统光传送网网元和智能光网 络网元混合组网的网络中, 其特征在于, 在和传统光传送网相连的两个 智能光网络网元之间配置至少一条且跨过至少一个传统光传送网网元 并连接所述两个智能光网絡网元的用于故障监控且参与路由计算的虚 拟流量工程链路; 所述方法包括:
在传统光传送网网元上预留对应于所述虚拟流量工程链路的带宽资 源, 并在预留带宽资源上建立交叉连接;
在智能光网絡网元上对所述虚拟流量工程链路启动故障监控并获取 故障状态信息;
每个和传统光传送网相连的智能光网络网元分别获取经过传统光传 送网连接到另一智能光网络网元的虚拟流量工程链路信息, 并在智能光 网络中发布获取的所述虚拟流量工程链路以及故障状态信息。
16、 一种智能光网络网元, 其特征在于, 包括虚拟流量工程链路配 置模块和虚拟流量工程链路信息发布模块:
所述虛拟流量工程链路配置模块, 用于在和传统光传送网相连的两 个智能光网络网元之间配置至少一条且跨过至少一个传统光传送网网 元并连接所述两个智能光网络网元的虚拟流量工程链路, 并获取所配置 的虚拟流量工程链路信息;
所述虚拟流量工程链路信息发布模块, 用于将来自所述虚拟流量工 程链路配置模块的所述虚拟流量工程链路信息向网络中的其它网元或 路径计算单元发布。 .
17、根据权利要求 16所述的智能光网络网元, 其特征在于, 所述网 元进一步包括: 虚拟流量工程链路状态管理模块, 用于接收来自所述虚 拟流量工程链路配置模块的所述虚拟流量工程链路信息, 根据所接收的 所述虚拟流量工程链路信息检测并确定所述虚拟流量工程链路所对应 的在传统光传送网和智能光网络之间的虛拟流量工程链路状态信息; 所述虚拟流量工程链路信息发布模块进一步用于将来自所述虚拟流 量工程链路状态管理模块的所述虚拟流量工程链路的状态信息向网络 中的其它网元或路径计算单元发布。
18、根据权利要求 17所述的智能光网络网元, 其特征在于, 所述网 元进一步包括: 虚拟流量工程链路资源分配模块, 用于根据所接收的连 接建立、 删除或修改虚拟流量工程链路的请求, 分配、 锋放或修改本地 的虚拟流量工程链路资源, 并将虚拟流量工程链路资源的分配、 释放以 及修改结果通知所述虚拟流量工程链路状态管理模块;
所述虛拟流量工程链路状态管理模块进一步用于根据来自所述虚拟 流量工程链路资源分配模块的虚拟流量工程链路资源的分配、 释放以及 修改结果更新对应虚拟流量工程链路的状态信息。
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