WO2017012431A1 - 一种多层网络中业务保护的方法、设备和系统 - Google Patents

一种多层网络中业务保护的方法、设备和系统 Download PDF

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Publication number
WO2017012431A1
WO2017012431A1 PCT/CN2016/084963 CN2016084963W WO2017012431A1 WO 2017012431 A1 WO2017012431 A1 WO 2017012431A1 CN 2016084963 W CN2016084963 W CN 2016084963W WO 2017012431 A1 WO2017012431 A1 WO 2017012431A1
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time
layer network
restoration
route switching
lower layer
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English (en)
French (fr)
Inventor
李晗
程伟强
王敏学
张婷婷
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China Mobile Communications Group Co Ltd
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China Mobile Communications Corp
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    • 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
    • H04L41/34—Signalling channels for network management communication
    • H04L41/342—Signalling channels for network management communication between virtual entities, e.g. orchestrators, SDN or NFV entities

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  • the present disclosure relates to the field of communications technologies, and in particular, to a method, device, and system for service protection in a multi-layer network.
  • each layer has a technology that guarantees service reliability.
  • each layer of the network involved in the service will be aware of the fault, and each layer of the network will take corresponding service protection or recovery actions.
  • the multi-layer network survival technology is not a simple superposition of each single-layer survivability, but an effective multi-layer survivability coordination mechanism needs to be established.
  • a mechanism is needed for protection cooperation of multi-layer networks.
  • a method of setting a hold-off time is adopted to perform coordinated protection of the multi-layer network to avoid switching concussion.
  • the embodiments of the present disclosure provide a method, a device, and a system for service protection in a multi-layer network, to implement coordinated protection between multiple layers of networks, and to avoid protection oscillation.
  • Embodiments of the present disclosure provide a method for service protection in a multi-layer network, including:
  • the lower layer network When the lower layer network detects that the service is faulty, it starts the recovery route calculation.
  • the restoration of the route switching is started to restore the service to normal.
  • the determining whether the second time meets the condition that the lower layer network completes the restoration of the route switching includes:
  • the recovery route switching time threshold is set according to at least one of the following parameters:
  • the performance of the nodes in the lower layer network the number of nodes, the number of services of a single node, and the transmission delay.
  • Embodiments of the present disclosure provide a method for service protection in a multi-layer network, including:
  • the lower layer network When the lower layer network detects that the service is faulty, it starts the recovery route calculation.
  • the lower layer network starts the restoration route switching only when the condition that the lower layer network completes the restoration of the route switching is satisfied in the second time;
  • the upper layer network After the set network delay time is reached, the upper layer network detects that the service is not restored. Normally, rerouting is initiated for the service.
  • the condition that the lower layer network determines that the second time meets the condition that the lower layer network completes the restoration of the route switching includes:
  • the lower layer network determines whether the product of the second time and the preset threshold coefficient is smaller than a preset restoration route switching time threshold; wherein the threshold coefficient ranges from greater than 0 and not greater than 1;
  • An embodiment of the present disclosure provides a lower layer network communication device, including:
  • the recovery route calculation unit is configured to start a recovery route calculation when detecting that the service is faulty
  • a first time determining unit configured to determine, at the first time when the recovery route calculation unit completes the restoration route calculation, from the start to the completion of the restoration route calculation;
  • a second time determining unit configured to calculate a difference between a delay time set by the upper layer network when the service fails, and a first time determined by the first time determining unit, and determine the difference as the second time;
  • the recovery route switching unit is configured to start the restoration route switching to restore the service to normal only when the condition that the lower layer network completes the restoration of the route switching is met at the second time determined by the second time determining unit.
  • the device further includes:
  • a determining unit configured to determine whether a product of the second time determined by the second time determining unit and the preset threshold coefficient is smaller than a preset resetting route switching time threshold; wherein the threshold coefficient has a value range of If the product is not less than the recovery route switching time threshold, determining that the second time satisfies the condition that the lower layer network completes the restoration of the route switching; when the product is smaller than the recovery When the switching time threshold is used, it is determined that the second time does not satisfy the condition that the lower layer network completes the restoration of the route switching.
  • the recovery route switching time threshold is set according to at least one of the following parameters:
  • the performance of the nodes in the lower layer network the number of nodes, the number of services of a single node, and the transmission delay.
  • Embodiments of the present disclosure provide a system for service protection in a multi-layer network, including an upper layer network communication device and a lower layer network communication device, where:
  • the upper-layer network communication device is configured to: when the service is faulty, set a delay time; after the set delay time is reached, and the service is not restored to be normal, the service is re-routed. ;
  • the lower layer network communication device is configured to start a recovery route calculation when the service fails, and determine the first time from the startup to the completion of the restoration route calculation when the restoration route calculation is completed; The difference between the set delay time and the first time is determined as the second time; and when the second time meets the condition that the lower layer network completes the restoration of the route switching, the recovery route switching is started. In order to restore the business to normal.
  • the lower layer network communication device is specifically configured to:
  • the rerouting function is introduced in the lower layer network without changing the existing upper layer network delay time running mechanism.
  • the recovery route calculation is started, and the restoration route calculation is completed. Determining the first time from the start to the completion of the recovery route calculation, and calculating the difference between the delay time set by the upper layer network when the service failure is detected and the first time, and determining the difference as the second time, only in When the second time meets the conditions for the lower-layer network to complete the restoration of the route switching, the restoration of the route switching is initiated.
  • the lower layer network only when the lower layer network completes the rerouting time less than the delay time set by the upper layer network, the lower layer network continues to initiate the restoration route switching when the restoration route calculation is completed. Otherwise, the lower layer network only completes the restoration route calculation, instead of Start recovery route switching, and the upper layer network starts re-routing after the set delay time ends, thus realizing Collaborative protection between multi-layer networks effectively avoids protection fluctuations.
  • FIG. 1 is a schematic diagram of a multi-layer network in the related art
  • FIG. 2 is a schematic diagram of a time axis of a stalling time operation mechanism in the related art
  • FIG. 3 is a schematic diagram of an implementation flow of a stalling time operation mechanism in the related art
  • FIG. 4 is a schematic diagram of a time axis of introducing a rerouting function by a stall time operation mechanism in the related art
  • FIG. 5 is a schematic flowchart of a method for service protection in a multi-layer network according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a time axis of a multi-layer network collaborative protection mechanism according to an embodiment of the present disclosure
  • FIG. 7 is a schematic flowchart of an implementation process of a multi-layer network collaborative protection mechanism according to an embodiment of the present disclosure
  • FIG. 8 is a schematic structural diagram of a lower layer network communication device according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a system for service protection in a multi-layer network according to an embodiment of the present disclosure.
  • the following two-layer network is taken as an example to illustrate the delay time operation mechanism in the related art.
  • the upper layer is the service layer network
  • the lower layer is the bearer layer network.
  • the service path of the service on the service layer network is Router1 ⁇ Router3.
  • the primary path of the bearer layer network is NE1 ⁇ NE2 ⁇ NE3: standby on the bearer layer network.
  • the path is: NE1 ⁇ NE4 ⁇ NE3; the actual service primary path in the service layer network is: Router1 ⁇ NE1 ⁇ NE2 ⁇ NE3 ⁇ Router3; the actual service alternate path in the service layer network is: Router1 ⁇ NE1 ⁇ NE4 ⁇ NE3 ⁇ Router3.
  • FIG. 2 and FIG. 3 respectively, a time axis schematic diagram and an implementation flow diagram of a stalling time operation mechanism in the related art are respectively shown. among them:
  • the service fails in the bearer layer network.
  • the bearer layer network detects a service fault and initiates protection switching, that is, switching from the primary path of the bearer layer network to the alternate path of the bearer layer network, and the protection switching time is ⁇ T2.
  • the service layer network detects a traffic failure and sets the stall time to ⁇ T1 (where ⁇ T1 is greater than ⁇ T2).
  • the time t2 and the time t2' are triggered by the alarm transmission, and are almost synchronized.
  • the bearer layer network completes the protection switching. If the protection switching succeeds, the service returns to normal. If the protection switching fails, the service layer network starts the rerouting when the delay time is reached, that is, at time t4, and completes the service at time t5. restore.
  • the delay time operation mechanism in the related art has two major disadvantages: First, when the bearer layer network protection switching fails, the upper layer protection must be waited for after the delay time is over, which prolongs the service recovery time and degrades the service protection performance; The upper layer protection protocol is complex and takes a long time to implement.
  • the bearer layer network has traditional network protection functions.
  • ASON Automatically Switched Optical Network
  • SDN Software Defined Network
  • the bearer layer network has traditional network protection functions.
  • it has a more flexible rerouting function, that is, recalculating an available path by using existing resources, and using the newly calculated available routes to ensure the running of the service.
  • the network resources occupied by the upper-layer network are generally only part of the lower-layer network. If the lower-layer network has more flexible service recovery capabilities, it will have more selectivity on the optional resources than the upper-layer network. The possibility of being unaffected is greater; at the same time, the underlying network is closer to the physical layer, and the overhead required for protection or recovery is less expensive and faster. Therefore, the protection and recovery mechanism of the underlying network should be maximized. However, considering the difficulty of inter-layer coordination work, it should be ensured that the existing delay time operation mechanism of the upper layer network is unchanged.
  • the time taken by the lower layer network protection recovery may be If the delay time is greater than the original setting, then the protection shock will be generated.
  • FIG. 4 a time axis diagram of a rerouting function is introduced for the stall time operation mechanism in the related art. Still take the two-layer network shown in Figure 1 as an example.
  • the service fails in the bearer layer network.
  • the bearer layer network detects a service failure, initiates rerouting, and the rerouting time is ⁇ T3.
  • the service layer network detects a traffic failure and sets the stall time to ⁇ T1.
  • the time t2 and the time t2' are triggered by the alarm transmission, and are almost synchronized.
  • the service layer network initiates rerouting. If the bearer layer network does not complete rerouting at this time, the bearer layer network and the service layer network simultaneously protect the service, and thus the protection flapping occurs.
  • an embodiment of the present disclosure provides a scheme for service protection in a multi-layer network.
  • the rerouting function is introduced in the lower layer network without changing the existing upper network delay time operation mechanism, and when the lower layer network detects that the service is faulty, the recovery route calculation is started, and when the restoration route calculation is completed, Determining the first time from the start to the completion of the recovery route calculation, and calculating the difference between the delay time set by the upper layer network and detecting the service failure, and determining the difference as the second time, only in the first time
  • the condition of the lower-layer network to complete the restoration of the route switching is met, the restoration of the route switching is initiated.
  • the lower layer network only when the lower layer network completes the rerouting time less than the delay time set by the upper layer network, the lower layer network continues to initiate the restoration route switching when the restoration route calculation is completed. Otherwise, the lower layer network only completes the restoration route calculation, instead of The recovery route switching is started, and the upper layer network starts the re-routing after the set delay time ends, thereby implementing the coordinated protection between the multi-layer networks, thereby effectively avoiding the protection oscillation.
  • the embodiment of the present disclosure provides a method for service protection in a multi-layer network, as shown in FIG. 5, which is a flowchart of implementation of the method, and specifically includes the following steps 51-54.
  • step 51 when the lower layer network detects that the service is faulty, the recovery route calculation is started.
  • the lower layer network in the embodiment of the present disclosure may be, but not limited to, a bearer layer network, and the upper layer network may But not limited to a service layer network.
  • the recovery route calculation that is, the existing resources are used to recalculate an available path.
  • Step 52 When the recovery route calculation is completed, determine the first time from the start to the completion of the restoration route calculation.
  • the preset timer can be started at the same time when the recovery route calculation is started.
  • the timer can be determined according to the timer. For a time.
  • Step 53 Calculate a difference between the stall time set by the upper layer network when the service fault is detected and the first time, and determine the difference as the second time.
  • Step 54 When the condition that the lower layer network completes the restoration of the route switching is satisfied in the second time, the restoration of the route switching is started to restore the service.
  • the routing switch is restored, and the service is switched to the newly calculated available route to ensure the service running.
  • determining whether the second time meets the condition that the lower layer network completes the restoration of the route switching may be, but is not limited to, implemented as follows:
  • the recovery route switching time threshold When the product is not less than the recovery route switching time threshold, it indicates that there is sufficient time to complete the restoration of the route switching. Therefore, it is determined that the second time satisfies the condition that the lower layer network completes the restoration of the route switching.
  • the recovery route switching time threshold When the product is less than the recovery route switching time threshold, it indicates that there is not enough time to complete the restoration of the route switching. If the recovery of the route switching is continued, the time of the re-routing of the lower-layer network is restored (that is, the time for restoring the route calculation and the restoration of the route switching). The sum of the time is greater than the delay time set by the upper network, resulting in a protection oscillation. Therefore, when the product is not less than the recovery route switching time threshold, it is determined that the second time does not satisfy the condition that the lower layer network completes the restoration of the route switching.
  • the recovery route switching time threshold may be set according to at least one of node performance, number of nodes, number of services of a single node, and transmission delay in the lower layer network.
  • the recovery route switching is not started, and the upper layer network ends at the set delay time according to the existing upper layer network delay time operation mechanism. After the re-routing is started, the service is restored to normal.
  • the rerouting function is introduced in the lower layer network without changing the existing upper layer network delay time running mechanism.
  • the recovery route calculation is started, and the restoration route calculation is completed. Determining the first time from the start to the completion of the recovery route calculation, and calculating the difference between the delay time set by the upper layer network when the service failure is detected and the first time, and determining the difference as the second time, only in When the second time meets the conditions for the lower-layer network to complete the restoration of the route switching, the restoration of the route switching is initiated.
  • the lower layer network only when the lower layer network completes the rerouting time less than the delay time set by the upper layer network, the lower layer network continues to initiate the restoration route switching when the restoration route calculation is completed. Otherwise, the lower layer network only completes the restoration route calculation, instead of The recovery route switching is started, and the upper layer network starts the re-routing after the set delay time ends, thereby implementing the coordinated protection between the multi-layer networks, thereby effectively avoiding the protection oscillation.
  • the embodiment of the present disclosure utilizes a timer set in a lower layer network (bearer layer network) to simultaneously count with a timer set by an upper layer network (service layer network), and determines whether to perform lower layer rerouting according to the timing of the two timers.
  • FIG. 6 and FIG. 7 are schematic diagrams showing a time axis diagram and an implementation flow of a multi-layer network collaborative protection mechanism according to an embodiment of the present disclosure.
  • Hold-off time ⁇ T1
  • the time for the bearer layer network to complete the recovery route calculation is ⁇ T4
  • the completion time from the completion of the restoration route calculation to the hold-off time is ⁇ T5
  • the hold-off time is generally set by the network operation and maintenance personnel. Therefore, the two-layer network can know the set time of the hold-off time.
  • the threshold of the recovery route switching time is set to T in advance, which may be determined according to parameters such as node performance, number of nodes, number of single node services, and transmission delay of the bearer layer network.
  • step 71 at time t1, the service fails in the bearer layer network.
  • step 72 at the time t2 and t2', the service layer network and the bearer layer network respectively detect a service fault.
  • the service layer network starts the stall timer and the stall time is set to ⁇ T1.
  • the bearer layer network initiates recovery route calculation.
  • Step 73 After t3, the bearer layer network completes the restoration route calculation, determines ⁇ T4, and determines the relationship between ⁇ T4 and T; when T ⁇ K* ⁇ T4, there is enough time to resume the route switching, and step 74 is performed; When K* ⁇ T4, step 75 is performed.
  • step 74 the bearer layer network continues to initiate recovery route switching and completes the rerouting function.
  • step 75 only the recovery route calculation is performed, but the action of restoring the route switching is not performed, and the ⁇ T1 of the service layer network is terminated, that is, at time t4, the rerouting is initiated by the service layer network.
  • the mechanism provided by the embodiments of the present disclosure is applicable to controlling a centralized SDN network.
  • the concept of SDN is to separate the control plane from the forwarding plane and to centralize the control plane. This architecture makes the network more flexible and can optimize the use of network resources from a global perspective.
  • the SDN controller in the multi-layer network can ensure efficient protection and re-routing of the lower layer and ensure that the upper layer network is not aware.
  • the rerouting function is introduced in the lower layer network without changing the existing upper layer network delay time running mechanism.
  • the recovery route calculation is started, and the restoration route calculation is completed. Determining the first time from the start to the completion of the recovery route calculation, and calculating the difference between the delay time set by the upper layer network when the service failure is detected and the first time, and determining the difference as the second time, only in When the second time meets the conditions for the lower-layer network to complete the restoration of the route switching, the restoration of the route switching is initiated.
  • the lower layer network only when the lower layer network completes the rerouting time less than the delay time set by the upper layer network, the lower layer network continues to initiate the restoration route switching when the restoration route calculation is completed. Otherwise, the lower layer network only completes the restoration route calculation, instead of The recovery route switching is started, and the upper layer network starts the re-routing after the set delay time ends, thereby implementing the coordinated protection between the multi-layer networks, thereby effectively avoiding the protection oscillation.
  • an embodiment of the present disclosure further provides a lower layer network communication device and a system for service protection in a multi-layer network. Since the principle of solving the problem in the device and the system is similar to the service protection in the multi-layer network, for the implementation of the above devices and systems, reference may be made to the implementation of the method, and the details are not described again.
  • FIG. 8 is a schematic structural diagram of a lower layer network communication device according to an embodiment of the present disclosure, including:
  • the recovery route calculation unit 81 is configured to start a recovery route calculation when detecting that the service is faulty;
  • the first time determining unit 82 is configured to determine, when the recovery route calculation unit 81 completes the restoration route calculation, a first time from the start to the completion of the restoration route calculation;
  • the second time determining unit 83 is configured to calculate a difference between the delay time set by the upper layer network when the service fails, and the first time determined by the first time determining unit 82, and determine the difference as Second time
  • the recovery route switching unit 84 is configured to initiate a recovery route switching to restore the service to normal only when the second time determined by the second time determining unit 83 satisfies the condition that the lower layer network completes the restoration of the route switching.
  • the device further includes:
  • the determining unit 85 is configured to determine whether the product of the second time determined by the second time determining unit 84 and the preset threshold coefficient is less than a preset reset route switching time threshold; wherein the value of the threshold coefficient is The range is greater than 0 and not greater than 1; when the product is not less than the recovery route switching time threshold, determining that the second time satisfies the condition that the lower layer network completes the restoration route switching; when the product is smaller than the When the routing switch time threshold is restored, it is determined that the second time does not satisfy the condition that the lower layer network completes the restoration of the route switching.
  • the recovery route switching time threshold is set according to at least one of the following parameters:
  • the performance of the nodes in the lower layer network the number of nodes, the number of services of a single node, and the transmission delay.
  • modules or units
  • functions of the various modules may be implemented in one or more software or hardware when implementing the present disclosure.
  • the foregoing lower layer network communication device may be disposed in a lower layer network.
  • a schematic structural diagram of a system for service protection in a multi-layer network includes an upper layer network communication device 91 and a lower layer network communication device 92, wherein:
  • the upper layer network communication device 91 is configured to set a delay time when a service failure occurs. After the set delay time is reached, and it is detected that the service does not return to normal, re-routing is initiated for the service;
  • the lower layer network communication device 92 is configured to start a recovery route calculation when the service fails, and determine a first time from the startup to the completion of the restoration route calculation when the restoration route calculation is completed; Determining the difference between the set delay time and the first time, determining the difference as the second time; starting the recovery route only when the second time satisfies the condition that the lower layer network completes the restoration of the route switching Switching to restore the service to normal.
  • the lower layer network communication device 92 is specifically configured to:
  • the rerouting function is introduced in the lower layer network without changing the existing upper layer network delay time running mechanism.
  • the recovery route calculation is started, and the restoration route calculation is completed. Determining the first time from the start to the completion of the recovery route calculation, and calculating the difference between the delay time set by the upper layer network when the service failure is detected and the first time, and determining the difference as the second time, only in When the second time meets the conditions for the lower-layer network to complete the restoration of the route switching, the restoration of the route switching is initiated.
  • the lower layer network only when the lower layer network completes the rerouting time less than the delay time set by the upper layer network, the lower layer network continues to initiate the restoration route switching when the restoration route calculation is completed. Otherwise, the lower layer network only completes the restoration route calculation, instead of The recovery route switching is started, and the upper layer network starts the re-routing after the set delay time ends, thereby implementing the coordinated protection between the multi-layer networks, thereby effectively avoiding the protection oscillation.
  • embodiments of the present disclosure can be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware aspects. Moreover, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本公开公开了一种多层网络中业务保护的方法、设备和系统，用以实现多层网络之间的协同保护，避免保护震荡。该方法包括：下层网络检测到业务发生故障时，启动恢复路由计算；在完成所述恢复路由计算时，确定所述恢复路由计算从启动到完成的第一时间；计算上层网络检测到所述业务发生故障时设定的拖延时间与所述第一时间的差值，将所述差值确定为第二时间；仅在所述第二时间满足所述下层网络完成恢复路由倒换的条件时，启动恢复路由倒换，以使所述业务恢复正常。

Description

一种多层网络中业务保护的方法、设备和系统
相关申请的交叉引用
本申请主张在2015年7月21日在中国提交的中国专利申请号No.201510432428.8的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，尤其涉及一种多层网络中业务保护的方法、设备和系统。
背景技术
随着电信技术的快速发展，为了满足不同的业务需求，运营商的网络构架呈现多技术并存，分层分域各司其职的特点。网络的生存性，尤其是多层网络的生存性是亟需突破的关键技术。
在多层网络中，每层都有保证业务可靠性的技术。当某业务发生故障时，该业务所涉及到的每层网络都会感知该故障，并且每层网络都会采取相应的业务保护或恢复动作。为了避免不同的单层保护恢复机制之间的独立运行导致故障产生时的倒换震荡，多层网络生存技术并不是各个单层生存性的简单叠加，而是需要建立有效的多层生存性协调机制，对于多层网络，尤其是要防止多层网络同时发生倒换的情况，需要一种机制进行多层网络的保护协同。
相关技术中的网络中采用设置拖延时间(Hold-off time)的方法来进行多层网络的协同保护，避免倒换震荡。
发明内容
有鉴于此，本公开实施例提供一种多层网络中业务保护的方法、设备和系统，用以实现多层网络之间的协同保护，避免保护震荡。
本公开实施例采用以下技术方案：
本公开实施例提供了一种多层网络中业务保护的方法，包括：
下层网络检测到业务发生故障时，启动恢复路由计算；
在完成所述恢复路由计算时，确定所述恢复路由计算从启动到完成的第一时间；
计算上层网络检测到所述业务发生故障时设定的拖延时间与所述第一时间的差值，将所述差值确定为第二时间；
仅在所述第二时间满足所述下层网络完成恢复路由倒换的条件时，启动恢复路由倒换，以使所述业务恢复正常。
其中，判断所述第二时间是否满足所述下层网络完成恢复路由倒换的条件，具体包括：
判断所述第二时间与预先设置的门限系数的乘积是否小于预先设置的恢复路由倒换时间门限值；其中，所述门限系数的取值范围为大于0且不大于1；
当所述乘积不小于所述恢复路由倒换时间门限值时，确定所述第二时间满足所述下层网络完成恢复路由倒换的条件；
当所述乘积小于所述恢复路由倒换时间门限值时，确定所述第二时间不满足所述下层网络完成恢复路由倒换的条件。
其中，所述恢复路由倒换时间门限值按照下述参数中的至少一个进行设置：
所述下层网络中的节点性能、节点数量、单个节点的业务数量和传输时延。
本公开实施例提供了一种多层网络中业务保护的方法，包括：
上层网络检测到业务发生故障时，设定拖延时间；
下层网络检测到所述业务发生故障时，启动恢复路由计算；
所述下层网络在完成所述恢复路由计算时，确定所述恢复路由计算从启动到完成的第一时间，并计算所述设定的拖延时间与所述第一时间的差值，将所述差值确定为第二时间；
所述下层网络仅在所述第二时间满足所述下层网络完成恢复路由倒换的条件时，启动恢复路由倒换；
所述上层网络在达到所述设定的拖延时间后，且检测到所述业务未恢复 正常时，对所述业务启动重路由。
其中，所述下层网络判断所述第二时间是否满足所述下层网络完成恢复路由倒换的条件，具体包括：
所述下层网络判断所述第二时间与预先设置的门限系数的乘积是否小于预先设置的恢复路由倒换时间门限值；其中，所述门限系数的取值范围为大于0且不大于1；
当所述乘积不小于所述恢复路由倒换时间门限值时，确定所述第二时间满足所述下层网络完成恢复路由倒换的条件；
当所述乘积小于所述恢复路由倒换时间门限值时，确定所述第二时间不满足所述下层网络完成恢复路由倒换的条件。
本公开实施例提供了一种下层网络通信设备，包括：
恢复路由计算单元，用于检测到业务发生故障时，启动恢复路由计算；
第一时间确定单元，用于在所述恢复路由计算单元完成所述恢复路由计算时，确定所述恢复路由计算从启动到完成的第一时间；
第二时间确定单元，用于计算上层网络检测到所述业务发生故障时设定的拖延时间与所述第一时间确定单元确定的第一时间的差值，将所述差值确定为第二时间；
恢复路由倒换单元，用于仅在所述第二时间确定单元确定的第二时间满足所述下层网络完成恢复路由倒换的条件时，启动恢复路由倒换，以使所述业务恢复正常。
其中，所述设备还包括：
判断单元，用于判断所述第二时间确定单元确定的第二时间与预先设置的门限系数的乘积是否小于预先设置的恢复路由倒换时间门限值；其中，所述门限系数的取值范围为大于0且不大于1；当所述乘积不小于所述恢复路由倒换时间门限值时，确定所述第二时间满足所述下层网络完成恢复路由倒换的条件；当所述乘积小于所述恢复路由倒换时间门限值时，确定所述第二时间不满足所述下层网络完成恢复路由倒换的条件。
其中，所述恢复路由倒换时间门限值按照下述参数中的至少一个进行设置：
所述下层网络中的节点性能、节点数量、单个节点的业务数量和传输时延。
本公开实施例提供了一种多层网络中业务保护的系统，包括上层网络通信设备和下层网络通信设备，其中：
所述上层网络通信设备，用于检测到业务发生故障时，设定拖延时间；在达到所述设定的拖延时间后，且检测到所述业务未恢复正常时，对所述业务启动重路由；
所述下层网络通信设备，用于检测到所述业务发生故障时，启动恢复路由计算；在完成所述恢复路由计算时，确定所述恢复路由计算从启动到完成的第一时间；计算所述设定的拖延时间与所述第一时间的差值，将所述差值确定为第二时间；仅在所述第二时间满足所述下层网络完成恢复路由倒换的条件时，启动恢复路由倒换，以使所述业务恢复正常。
其中，所述下层网络通信设备，具体用于：
判断所述第二时间与预先设置的门限系数的乘积是否小于预先设置的恢复路由倒换时间门限值；其中，所述门限系数的取值范围为大于0且不大于1；当所述乘积不小于所述恢复路由倒换时间门限值时，确定所述第二时间满足所述下层网络完成恢复路由倒换的条件；当所述乘积小于所述恢复路由倒换时间门限值时，确定所述第二时间不满足所述下层网络完成恢复路由倒换的条件。
本公开实施例的有益效果如下：
本公开实施例中，在不改动现有的上层网络拖延时间运行机制的情况下，在下层网络引入重路由功能，当下层网络检测到业务发生故障时，启动恢复路由计算，在完成恢复路由计算时，确定恢复路由计算从启动到完成的第一时间，并计算上层网络检测到业务发生故障时设定的拖延时间与第一时间的差值，将该差值确定为第二时间，仅在第二时间满足下层网络完成恢复路由倒换的条件时，启动恢复路由倒换。也就是说，只有在下层网络完成重路由的时间小于上层网络设定的拖延时间时，下层网络才在完成恢复路由计算时继续启动恢复路由倒换，否则，下层网络仅完成恢复路由计算，而不启动恢复路由倒换，由上层网络在设定的拖延时间结束后启动重路由，从而实现了 多层网络之间的协同保护，有效避免了保护震荡。
本公开的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本公开而了解。本公开的目的和其他优点可通过在所写的说明书、权利要求书、以及附图中所特别指出的结构来实现和获得。
附图说明
此处所说明的附图用来提供对本公开的进一步理解，构成本公开的一部分，本公开的示意性实施例及其说明用于解释本公开，并不构成对本公开的不当限定。在附图中：
图1为相关技术中的多层网络示意图；
图2为相关技术中的拖延时间运行机制的时间轴示意图；
图3为相关技术中的拖延时间运行机制的实现流程示意图；
图4为相关技术中的拖延时间运行机制引入重路由功能的时间轴示意图；
图5为本公开实施例提供的一种多层网络中业务保护的方法的原理流程图；
图6为本公开实施例提供的多层网络协同保护机制的时间轴示意图；
图7为本公开实施例提供的多层网络协同保护机制的实现流程示意图；
图8为本公开实施例提供的一种下层网络通信设备的结构示意图；
图9为本公开实施例提供的一种多层网络中业务保护的系统的结构示意图。
具体实施方式
下面以两层网络为例，说明相关技术中的拖延时间运行机制。
如图1所示，上层为服务层网络，下层为承载层网络。其中，在Router1到Router3之间有一条业务，则该业务在服务层网络的业务路径为：Router1→Router3；在承载层网络的主用路径为：NE1→NE2→NE3：在承载层网络的备用路径为：NE1→NE4→NE3；在服务层网络的实际业务主用路径为：Router1→NE1→NE2→NE3→Router3；在服务层网络的实际业务备用路径为： Router1→NE1→NE4→NE3→Router3。
参照如图2和图3，分别为相关技术中的拖延时间运行机制的时间轴示意图和实现流程示意图。其中：
在t1时刻，业务在承载层网络发生故障。
在t2时刻，承载层网络检测到业务故障，启动保护倒换，即从承载层网络的主用路径倒换到承载层网络的备用路径上，保护倒换的时间为ΔT2。
在t2’时刻，服务层网络检测到业务故障，设定拖延时间为ΔT1(其中，ΔT1大于ΔT2)。另外，t2时刻与t2’时刻由告警传递触发，几乎同步。
在t3时刻，承载层网络完成保护倒换，如果保护倒换成功，则业务恢复正常；如果保护倒换失败，则服务层网络在达到拖延时间时，即t4时刻，启动重路由，并在t5时刻完成业务恢复。
相关技术中的拖延时间运行机制存在两大缺点：一是承载层网络保护倒换失效时，必须等待拖延时间结束后才能够采用上层保护，延长了业务恢复的时间，使业务保护性能劣化；二是上层保护协议复杂，实现时间长。
因此，亟需一种新的多层网络协同保护机制来防止保护震荡。
为了实现多层网络之间的协同保护，避免保护震荡，申请人对相关技术进行了仔细研究。
近几年随着控制面技术的发展，比如自动交换光网络(Automatically Switched Optical Network，ASON)，软件定义网络(Software Defined Network，SDN)等技术的进步，承载层网络除了具有传统的网络保护功能外，还具有更加灵活的重路由功能，即利用现有资源重新计算出一条可用路径，利用新计算出的可用路由来保证业务运行。
对于多层网络，上层网络占有的网络资源一般仅是下层网络的一部分，如果下层网络具有更加灵活的业务恢复能力时，会比上层网络在可选资源上的选择性更多，也就说业务不受影响的可能性更大；同时，下层网络更接近物理层，保护或恢复所需的开销代价更小，速度更快。因此应该最大化采用下层网络的保护、恢复机制。但同时考虑到层间协同工作难度较大，应尽量保证上层网络现有的拖延时间运行机制不变。
一旦下层网络中引入重路由功能，下层网络保护恢复占用的时间可能会 大于原有设置的拖延时间，那么必将产生保护震荡。
如图4所示，为相关技术中的拖延时间运行机制引入重路由功能的时间轴示意图。仍以图1所示的两层网络为例。
在t1时刻，业务在承载层网络发生故障。
在t2时刻，承载层网络检测到业务故障，启动重路由，重路由的时间为ΔT3。
在t2’时刻，服务层网络检测到业务故障，设定拖延时间为ΔT1。另外，t2时刻与t2’时刻由告警传递触发，几乎同步。
在t4时刻，服务层网络启动重路由，如果此时承载层网络没有完成重路由，那么承载层网络和服务层网络就会同时对该业务进行保护，从而出现保护震荡。
基于上述分析，本公开实施例提供了一种多层网络中业务保护的方案。该技术方案中，在不改动现有的上层网络拖延时间运行机制的情况下，在下层网络引入重路由功能，当下层网络检测到业务发生故障时，启动恢复路由计算，在完成恢复路由计算时，确定恢复路由计算从启动到完成的第一时间，并计算上层网络检测到业务发生故障时设定的拖延时间与第一时间的差值，将该差值确定为第二时间，仅在第二时间满足下层网络完成恢复路由倒换的条件时，启动恢复路由倒换。也就是说，只有在下层网络完成重路由的时间小于上层网络设定的拖延时间时，下层网络才在完成恢复路由计算时继续启动恢复路由倒换，否则，下层网络仅完成恢复路由计算，而不启动恢复路由倒换，由上层网络在设定的拖延时间结束后启动重路由，从而实现了多层网络之间的协同保护，有效避免了保护震荡。
以下结合说明书附图对本公开的实施例进行说明，应当理解，此处所描述的实施例仅用于说明和解释本公开，并不用于限制本公开。并且在不冲突的情况下，本公开中的实施例及实施例的特征可以互相结合。
本公开实施例提供了一种多层网络中业务保护的方法，如图5所示，为该方法的实现流程图，具体包括下述步骤51-54。
步骤51，下层网络检测到业务发生故障时，启动恢复路由计算。
本公开实施例中的下层网络可以但不限于为承载层网络，上层网络可以 但不限于为服务层网络。
其中，恢复路由计算，即利用现有资源重新计算出一条可用路径。
步骤52，在完成恢复路由计算时，确定恢复路由计算从启动到完成的第一时间。
其中，为了确定出恢复路由计算从启动到完成的第一时间，可以在启动恢复路由计算时，同时启动预先设置的定时器，在完成恢复路由计算时，便可以根据定时器的计时确定出第一时间。
步骤53，计算上层网络检测到业务发生故障时设定的拖延时间与第一时间的差值，将该差值确定为第二时间。
步骤54，仅在第二时间满足下层网络完成恢复路由倒换的条件时，启动恢复路由倒换，以使业务恢复正常。
其中，恢复路由倒换，即将业务倒换到新计算出的可用路由，来保证业务运行。
具体的，判断第二时间是否满足下层网络完成恢复路由倒换的条件，可以但不限于按照如下方式实现：
判断第二时间与预先设置的门限系数的乘积是否小于预先设置的恢复路由倒换时间门限值；其中，门限系数的取值范围可以为大于0且不大于1；
当该乘积不小于恢复路由倒换时间门限值时，说明有足够的时间完成恢复路由倒换，因此，确定第二时间满足下层网络完成恢复路由倒换的条件；
当该乘积小于恢复路由倒换时间门限值时，说明没有足够的时间完成恢复路由倒换，如果继续启动恢复路由倒换，会导致下层网络进行重路由的时间(即恢复路由计算的时间和恢复路由倒换的时间的总和)大于上层网络设定的拖延时间，从而产生保护震荡。因此，在上述乘积不小于恢复路由倒换时间门限值时，确定第二时间不满足下层网络完成恢复路由倒换的条件。
其中，恢复路由倒换时间门限值可以根据下层网络中的节点性能、节点数量、单个节点的业务数量和传输时延中的至少一个来进行设置。
本公开实施例中，如果第二时间不满足下层网络完成恢复路由倒换的条件时，则不启动恢复路由倒换，按照现有的上层网络拖延时间运行机制，由上层网络在设定的拖延时间结束后启动重路由，以使业务恢复正常。
本公开实施例中，在不改动现有的上层网络拖延时间运行机制的情况下，在下层网络引入重路由功能，当下层网络检测到业务发生故障时，启动恢复路由计算，在完成恢复路由计算时，确定恢复路由计算从启动到完成的第一时间，并计算上层网络检测到业务发生故障时设定的拖延时间与第一时间的差值，将该差值确定为第二时间，仅在第二时间满足下层网络完成恢复路由倒换的条件时，启动恢复路由倒换。也就是说，只有在下层网络完成重路由的时间小于上层网络设定的拖延时间时，下层网络才在完成恢复路由计算时继续启动恢复路由倒换，否则，下层网络仅完成恢复路由计算，而不启动恢复路由倒换，由上层网络在设定的拖延时间结束后启动重路由，从而实现了多层网络之间的协同保护，有效避免了保护震荡。
为了更好的理解本公开实施例，以下结合具体的实施对本公开实施例的具体实施过程进行说明。
仍以图1所示的两层网络为例。
本公开实施例利用在下层网络(承载层网络)设置计时器，与上层网络(服务层网络)设置的计时器同时进行计时，并根据这两个计时器的计时来决定是否进行下层重路由。
如图6和图7所示，分别为本公开实施例提供的多层网络协同保护机制的时间轴示意图和实现流程示意图。
参照图6，Hold-off time＝ΔT1，承载层网络完成恢复路由计算的时间为ΔT4，从完成恢复路由计算到hold-off time结束时间为ΔT5；hold-off time一般是由网络运维人员设置，因此两层网络都可以得知hold-off time的设置时间。
三者之间的关系为：ΔT4＝ΔT1-ΔT5；
预先设置恢复路由倒换时间门限值为T，其可以根据承载层网络的节点性能、节点数量、单个节点业务数量，传输时延等参数决定。
判断ΔT4与T的关系：引入门限系数K(0＜K＜＝1)，K可自定义设置。
当T≤K*ΔT4时，有足够时间进行恢复路由倒换，则承载层网络继续启动恢复路由倒换，完成重路由功能；
当T＞K*ΔT4时，仅进行恢复路由计算，但不执行恢复路由倒换的动作。
参照图7，具体实现流程如下：
步骤71，在t1时刻，业务在承载层网络发生故障。
步骤72，在t2及t2’时刻，服务层网络、承载层网络分别检测到业务故障。服务层网络启动拖延时间计时器，拖延时间设置为ΔT1。承载层网络启动恢复路由计算。
步骤73，在t3时刻，承载层网络完成恢复路由计算后，确定ΔT4，并判断ΔT4与T的关系；当T≤K*ΔT4时，有足够时间进行恢复路由倒换，执行步骤74；当T＞K*ΔT4时，执行步骤75。
步骤74，承载层网络继续启动恢复路由倒换，完成重路由功能。
步骤75，仅进行恢复路由计算，但不执行恢复路由倒换的动作，等待服务层网络的ΔT1结束，即在t4时刻，由服务层网络启动重路由。
本公开实施例提供的机制适用于控制集中化的SDN网络。SDN的理念是控制面与转发面的分离，并将控制面集中化，这样的架构使得网络更加灵活，能够从全局视角最优化的利用网络资源。多层网络中的SDN控制器可以确保下层高效的进行业务保护及重路由，并且保证上层网络不感知。
本公开实施例中，在不改动现有的上层网络拖延时间运行机制的情况下，在下层网络引入重路由功能，当下层网络检测到业务发生故障时，启动恢复路由计算，在完成恢复路由计算时，确定恢复路由计算从启动到完成的第一时间，并计算上层网络检测到业务发生故障时设定的拖延时间与第一时间的差值，将该差值确定为第二时间，仅在第二时间满足下层网络完成恢复路由倒换的条件时，启动恢复路由倒换。也就是说，只有在下层网络完成重路由的时间小于上层网络设定的拖延时间时，下层网络才在完成恢复路由计算时继续启动恢复路由倒换，否则，下层网络仅完成恢复路由计算，而不启动恢复路由倒换，由上层网络在设定的拖延时间结束后启动重路由，从而实现了多层网络之间的协同保护，有效避免了保护震荡。
基于同一发明构思，本公开实施例中还分别提供了一种下层网络通信设备和多层网络中业务保护的系统，由于上述设备及系统解决问题的原理与多层网络中业务保护的相似，因此上述设备及系统的实施可以参见方法的实施，重复之处不再赘述。
如图8所示，为本公开实施例提供的下层网络通信设备的结构示意图，包括：
恢复路由计算单元81，用于检测到业务发生故障时，启动恢复路由计算；
第一时间确定单元82，用于在所述恢复路由计算单元81完成所述恢复路由计算时，确定所述恢复路由计算从启动到完成的第一时间；
第二时间确定单元83，用于计算上层网络检测到所述业务发生故障时设定的拖延时间与所述第一时间确定单元82确定的第一时间的差值，将所述差值确定为第二时间；
恢复路由倒换单元84，用于仅在所述第二时间确定单元83确定的第二时间满足所述下层网络完成恢复路由倒换的条件时，启动恢复路由倒换，以使所述业务恢复正常。
所述设备还包括：
判断单元85，用于判断所述第二时间确定单元84确定的第二时间与预先设置的门限系数的乘积是否小于预先设置的恢复路由倒换时间门限值；其中，所述门限系数的取值范围为大于0且不大于1；当所述乘积不小于所述恢复路由倒换时间门限值时，确定所述第二时间满足所述下层网络完成恢复路由倒换的条件；当所述乘积小于所述恢复路由倒换时间门限值时，确定所述第二时间不满足所述下层网络完成恢复路由倒换的条件。
其中，所述恢复路由倒换时间门限值按照下述参数中的至少一个进行设置：
所述下层网络中的节点性能、节点数量、单个节点的业务数量和传输时延。
为了描述的方便，以上各部分按照功能划分为各模块(或单元)分别描述。当然，在实施本公开时可以把各模块(或单元)的功能在同一个或多个软件或硬件中实现。
具体实施时，上述下层网络通信设备可以设置在下层网络中。
如图9所示，为本公开实施例提供的多层网络中业务保护的系统的结构示意图，包括上层网络通信设备91和下层网络通信设备92，其中：
所述上层网络通信设备91，用于检测到业务发生故障时，设定拖延时间； 在达到所述设定的拖延时间后，且检测到所述业务未恢复正常时，对所述业务启动重路由；
所述下层网络通信设备92，用于检测到所述业务发生故障时，启动恢复路由计算；在完成所述恢复路由计算时，确定所述恢复路由计算从启动到完成的第一时间；计算所述设定的拖延时间与所述第一时间的差值，将所述差值确定为第二时间；仅在所述第二时间满足所述下层网络完成恢复路由倒换的条件时，启动恢复路由倒换，以使所述业务恢复正常。
其中，所述下层网络通信设备92，具体用于：
判断所述第二时间与预先设置的门限系数的乘积是否小于预先设置的恢复路由倒换时间门限值；其中，所述门限系数的取值范围为大于0且不大于1；当所述乘积不小于所述恢复路由倒换时间门限值时，确定所述第二时间满足所述下层网络完成恢复路由倒换的条件；当所述乘积小于所述恢复路由倒换时间门限值时，确定所述第二时间不满足所述下层网络完成恢复路由倒换的条件。
本公开实施例中，在不改动现有的上层网络拖延时间运行机制的情况下，在下层网络引入重路由功能，当下层网络检测到业务发生故障时，启动恢复路由计算，在完成恢复路由计算时，确定恢复路由计算从启动到完成的第一时间，并计算上层网络检测到业务发生故障时设定的拖延时间与第一时间的差值，将该差值确定为第二时间，仅在第二时间满足下层网络完成恢复路由倒换的条件时，启动恢复路由倒换。也就是说，只有在下层网络完成重路由的时间小于上层网络设定的拖延时间时，下层网络才在完成恢复路由计算时继续启动恢复路由倒换，否则，下层网络仅完成恢复路由计算，而不启动恢复路由倒换，由上层网络在设定的拖延时间结束后启动重路由，从而实现了多层网络之间的协同保护，有效避免了保护震荡。
本领域内的技术人员应明白，本公开的实施例可提供为方法、系统、或计算机程序产品。因此，本公开可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本公开是参照根据本公开实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本公开的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本公开范围的所有变更和修改。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (10)

  1. 一种多层网络中业务保护的方法，包括：
    下层网络检测到业务发生故障时，启动恢复路由计算；
    在完成所述恢复路由计算时，确定所述恢复路由计算从启动到完成的第一时间；
    计算上层网络检测到所述业务发生故障时设定的拖延时间与所述第一时间的差值，将所述差值确定为第二时间；
    仅在所述第二时间满足所述下层网络完成恢复路由倒换的条件时，启动恢复路由倒换，以使所述业务恢复正常。
  2. 如权利要求1所述的方法，其中，判断所述第二时间是否满足所述下层网络完成恢复路由倒换的条件，具体包括：
    判断所述第二时间与预先设置的门限系数的乘积是否小于预先设置的恢复路由倒换时间门限值；其中，所述门限系数的取值范围为大于0且不大于1；
    当所述乘积不小于所述恢复路由倒换时间门限值时，确定所述第二时间满足所述下层网络完成恢复路由倒换的条件；
    当所述乘积小于所述恢复路由倒换时间门限值时，确定所述第二时间不满足所述下层网络完成恢复路由倒换的条件。
  3. 如权利要求2所述的方法，其中，所述恢复路由倒换时间门限值按照下述参数中的至少一个进行设置：
    所述下层网络中的节点性能、节点数量、单个节点的业务数量和传输时延。
  4. 一种多层网络中业务保护的方法，包括：
    上层网络检测到业务发生故障时，设定拖延时间；
    下层网络检测到所述业务发生故障时，启动恢复路由计算；
    所述下层网络在完成所述恢复路由计算时，确定所述恢复路由计算从启动到完成的第一时间，并计算所述设定的拖延时间与所述第一时间的差值，将所述差值确定为第二时间；
    所述下层网络仅在所述第二时间满足所述下层网络完成恢复路由倒换的条件时，启动恢复路由倒换；
    所述上层网络在达到所述设定的拖延时间后，且检测到所述业务未恢复正常时，对所述业务启动重路由。
  5. 如权利要求4所述的方法，其中，所述下层网络判断所述第二时间是否满足所述下层网络完成恢复路由倒换的条件，具体包括：
    所述下层网络判断所述第二时间与预先设置的门限系数的乘积是否小于预先设置的恢复路由倒换时间门限值；其中，所述门限系数的取值范围为大于0且不大于1；
    当所述乘积不小于所述恢复路由倒换时间门限值时，确定所述第二时间满足所述下层网络完成恢复路由倒换的条件；
    当所述乘积小于所述恢复路由倒换时间门限值时，确定所述第二时间不满足所述下层网络完成恢复路由倒换的条件。
  6. 一种下层网络通信设备，包括：
    恢复路由计算单元，用于检测到业务发生故障时，启动恢复路由计算；
    第一时间确定单元，用于在所述恢复路由计算单元完成所述恢复路由计算时，确定所述恢复路由计算从启动到完成的第一时间；
    第二时间确定单元，用于计算上层网络检测到所述业务发生故障时设定的拖延时间与所述第一时间确定单元确定的第一时间的差值，将所述差值确定为第二时间；
    恢复路由倒换单元，用于仅在所述第二时间确定单元确定的第二时间满足所述下层网络完成恢复路由倒换的条件时，启动恢复路由倒换，以使所述业务恢复正常。
  7. 如权利要求6所述的设备，其中，所述设备还包括：
    判断单元，用于判断所述第二时间确定单元确定的第二时间与预先设置的门限系数的乘积是否小于预先设置的恢复路由倒换时间门限值；其中，所述门限系数的取值范围为大于0且不大于1；当所述乘积不小于所述恢复路由倒换时间门限值时，确定所述第二时间满足所述下层网络完成恢复路由倒换的条件；当所述乘积小于所述恢复路由倒换时间门限值时，确定所述第二 时间不满足所述下层网络完成恢复路由倒换的条件。
  8. 如权利要求7所述的设备，其中，所述恢复路由倒换时间门限值按照下述参数中的至少一个进行设置：
    所述下层网络中的节点性能、节点数量、单个节点的业务数量和传输时延。
  9. 一种多层网络中业务保护的系统，包括上层网络通信设备和下层网络通信设备，其中：
    所述上层网络通信设备，用于检测到业务发生故障时，设定拖延时间；在达到所述设定的拖延时间后，且检测到所述业务未恢复正常时，对所述业务启动重路由；
    所述下层网络通信设备，用于检测到所述业务发生故障时，启动恢复路由计算；在完成所述恢复路由计算时，确定所述恢复路由计算从启动到完成的第一时间；计算所述设定的拖延时间与所述第一时间的差值，将所述差值确定为第二时间；仅在所述第二时间满足所述下层网络完成恢复路由倒换的条件时，启动恢复路由倒换，以使所述业务恢复正常。
  10. 如权利要求9所述的系统，其中，所述下层网络通信设备，具体用于：
    判断所述第二时间与预先设置的门限系数的乘积是否小于预先设置的恢复路由倒换时间门限值；其中，所述门限系数的取值范围为大于0且不大于1；当所述乘积不小于所述恢复路由倒换时间门限值时，确定所述第二时间满足所述下层网络完成恢复路由倒换的条件；当所述乘积小于所述恢复路由倒换时间门限值时，确定所述第二时间不满足所述下层网络完成恢复路由倒换的条件。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10652084B2 (en) 2018-05-01 2020-05-12 At&T Intellectual Property I, L.P. Service recovery in a software defined network

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115623364B (zh) * 2022-09-08 2025-07-22 烽火通信科技股份有限公司 一种ip和光网络保护倒换协同管控的方法和系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1512716A (zh) * 2002-12-30 2004-07-14 北京邮电大学 一种多层网络故障恢复方法
CN101621497A (zh) * 2008-06-30 2010-01-06 华为技术有限公司 一种多层网络中的业务保护的方法和系统
CN101626317A (zh) * 2008-07-07 2010-01-13 华为技术有限公司 一种链路故障恢复的方法、系统和装置
CN102186124A (zh) * 2011-04-29 2011-09-14 东北大学 一种wdm光网络中的基于效用的层间协调方法
US20140198635A1 (en) * 2013-01-16 2014-07-17 Electronics And Telecommunications Research Institute Method of recovering fault in multilayer network and apparatus thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101616344B (zh) * 2009-06-17 2012-06-06 中兴通讯股份有限公司 基于自动交换光网络的业务保护方法及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1512716A (zh) * 2002-12-30 2004-07-14 北京邮电大学 一种多层网络故障恢复方法
CN101621497A (zh) * 2008-06-30 2010-01-06 华为技术有限公司 一种多层网络中的业务保护的方法和系统
CN101626317A (zh) * 2008-07-07 2010-01-13 华为技术有限公司 一种链路故障恢复的方法、系统和装置
CN102186124A (zh) * 2011-04-29 2011-09-14 东北大学 一种wdm光网络中的基于效用的层间协调方法
US20140198635A1 (en) * 2013-01-16 2014-07-17 Electronics And Telecommunications Research Institute Method of recovering fault in multilayer network and apparatus thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10652084B2 (en) 2018-05-01 2020-05-12 At&T Intellectual Property I, L.P. Service recovery in a software defined network
US11463304B2 (en) 2018-05-01 2022-10-04 At&T Intellectual Property I, L.P. Service recovery in a software defined network

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