WO2015074418A1 - 一种共享保护方法、装置及系统 - Google Patents

一种共享保护方法、装置及系统 Download PDF

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Publication number
WO2015074418A1
WO2015074418A1 PCT/CN2014/080634 CN2014080634W WO2015074418A1 WO 2015074418 A1 WO2015074418 A1 WO 2015074418A1 CN 2014080634 W CN2014080634 W CN 2014080634W WO 2015074418 A1 WO2015074418 A1 WO 2015074418A1
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Prior art keywords
node
protection
shared
entity
status
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PCT/CN2014/080634
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English (en)
French (fr)
Inventor
刘国满
牛小兵
安高峰
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中兴通讯股份有限公司
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Publication of WO2015074418A1 publication Critical patent/WO2015074418A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/64Hybrid switching systems
    • H04L12/6418Hybrid transport

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a shared protection method, apparatus, and system. Background technique
  • the status information of each protection entity is detected or advertised by the node shared by multiple protection entities, and the shared node analyzes the current state according to the preemption rule of the SMP priority.
  • the processing is advertised to the upper end node of the protection entity sharing the segment resource by using a specific control APS transmission channel.
  • the present invention provides a sharing protection method, apparatus, and system, which can increase the transparency of a shared node.
  • the invention provides a sharing protection method, the method comprising:
  • the controller receives state change information and sharing relationship information
  • the controller determines, according to the state change information, the sharing relationship information, and a priority rule, a protection entity that occupies a shared resource, and determines a state of the end node and/or the shared node of the protection entity.
  • the status change information includes: a working entity and a protection entity end-to-end Status, and management commands;
  • the sharing relationship information includes: a link resource shared by the protection entity, and an identifier (ID) of the protection entity.
  • the method further includes:
  • the present invention provides a sharing protection method, the method comprising:
  • the node Determining that it is an end node or a shared node in a protection relationship, and if it is an end node, when the corresponding working entity or the protection entity changes state, the node reports state change information;
  • the method further includes:
  • the node If the protection switching lock clear state UnLOP command is received, the node detects that the working entity is faulty, and sends a status negotiation message to the opposite node and performs protection switching.
  • the node If the protection switch lock state LOP command is received, the node sends a LOP status negotiation message to the peer node, and the node and its opposite node do not perform the protection switching operation.
  • the present invention provides a sharing protection method, the method comprising:
  • the node determines that it is the end node in the protection relationship or is the shared node. If it is the end node, when the corresponding working entity or the protection entity changes state, the node reports the state change information to the controller; When the shared protection relationship changes, the node reports the sharing relationship information to the controller;
  • the controller receives the state change information reported by the node as an end node, and receives the sharing relationship information reported by the node as a shared node;
  • the controller determines, according to the state change information, the sharing relationship information, and the SMP priority rule, a protection entity that occupies a shared resource, and determines a state of the end node and/or the shared node of the protection entity.
  • the present invention further provides a controller, the controller includes: a state analysis module, configured to receive state change information and sharing relationship information, and determine according to the state change information, the sharing relationship information, and a priority rule.
  • a state analysis module configured to receive state change information and sharing relationship information, and determine according to the state change information, the sharing relationship information, and a priority rule.
  • a protected entity that occupies a shared resource and determines the state of the end node and/or the shared node of the protected entity.
  • the state change information includes: an end-to-end state of the working entity and the protection entity, and a management command;
  • the sharing relationship information includes: a link resource shared by the protection entity, and an ID of the protection entity.
  • the controller further includes: a command issuing module, configured to determine a protection entity that occupies the shared resource, and after determining the state of the end node or the shared node of the protection entity, to protect the protection switching state
  • the entity end node issues a protection switching lock state LOP or a protection switching lock clear state UnLOP; and/or, and issues an establishment or deletion operation management command for determining the connection of the protection entity to the intermediate shared node.
  • the present invention further provides a node, the node includes: a status reporting module, configured to determine that the end node in the protection relationship is a shared node, or a shared node, and if the end node is, the corresponding working entity or the protection entity occurs. When the status changes, the status change information is reported; if it is a shared node, when the shared protection relationship changes, the sharing relationship information is reported.
  • a status reporting module configured to determine that the end node in the protection relationship is a shared node, or a shared node, and if the end node is, the corresponding working entity or the protection entity occurs.
  • the node further includes: a handover execution module, configured to perform a handover operation; if the UnLOP instruction is received, the node detects that the working entity is faulty, and sends a status negotiation message to the opposite node, and performs Protection switching
  • the LOP status negotiation message is sent to the peer node, and the protection switching operation does not occur on itself and its opposite node.
  • the present invention provides a shared protection system, the system comprising: a node and a controller; wherein the controller is the controller in the above solution; the node is the node in the above solution.
  • the shared protection method, device and system provided by the present invention can receive status change information and receive sharing relationship information by the controller; the controller according to the status change information, the sharing relationship The information, and the priority rule, determine the protection entity occupying the shared resource, and determine the state of the end node or the shared node of the protection entity.
  • the complexity of the shared node can be simplified, the APS state negotiation process between the end node and the shared node is avoided, and the transparency of the shared node is increased.
  • FIG. 2 is a second schematic flowchart of a shared protection method according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart 3 of a shared protection method according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram 1 of a usage scenario according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram 2 of a usage scenario according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram 3 of a usage scenario according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram 4 of a usage scenario according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a system structure according to an embodiment of the present invention. detailed description
  • the operation flow of the controller in the shared protection method provided by the present invention, as shown in FIG. 1, includes: Step 101: The controller receives state change information and sharing relationship information.
  • the state change information is: state change information of the end node end-to-end entity reported by each end node to the controller; wherein the state change information may include: a working entity and a protection entity upper end to The state of the end, as well as management commands and so on.
  • the sharing relationship information is: the information reported by each shared node to the controller, which may include a link resource shared by the protection entity and an identifier ID of the protection entity.
  • Step 102 The controller determines, according to the state change information, the sharing relationship information, and a priority rule, a protection entity that occupies a shared resource, and determines an end section of the protection entity. The status of points and/or shared nodes.
  • the determining the state of the end node and/or the shared node of the protection entity may include: determining a protection state of each protection entity, and issuing a protection switching lock to each end node of the protection entity according to the determined protection status ( The LOP, Lock of protection command or the Unlock of Protection (UnLOP) command; and/or, the connection establishment or deletion of the protection entity that can occupy the shared resource is sent to the shared node.
  • the LOP, Lock of protection command or the Unlock of Protection (UnLOP) command The LOP, Lock of protection command or the Unlock of Protection (UnLOP) command
  • the protection states include: a protection switching lock state (LOP) and a protection switching lock clear state (UnLOP).
  • LOP protection switching lock state
  • UnLOP protection switching lock clear state
  • connection establishment or deletion of the protection entity may be: adding or deleting a corresponding flow entry, so as to ensure that only one protection entity occupies the shared resource at the same time.
  • the initial state of each protection entity of the shared relationship may be: set to protect the switching lock state (LOP), or configured in the shared protection relationship by the controller to directly set the protection entity with the sharing relationship to the protection switching state.
  • LOP switching lock state
  • the LOP is a protected service that cannot be switched over to the protection entity and occupies the shared protection resource. For example, when a protection entity is in the LOP, the protection entity cannot use the shared resource, thereby ensuring that the shared resource is the same. Time can only be guaranteed by one protected entity.
  • UnLop is used only to release the original protection switching lock command, but has no effect on other management commands, unlike the existing Clear command.
  • the protection switching lock state (L0P) instruction and the protection switching lock clear state (UnLOP) instruction may include: an SDN packet (Hederer) and a command, for example, as shown in Table 1,
  • the determining the status of the shared node may include: sending an establishment or deletion operation management command for determining the connection of the protection entity to the intermediate shared node, that is, adding or deleting a flow entry, the command
  • the format of the message is shown in Table 2.
  • the controller may further perform path calculation according to the network topology information, and send the calculated path information to the end node and/or the shared node.
  • Embodiment 2 may further perform path calculation according to the network topology information, and send the calculated path information to the end node and/or the shared node.
  • Step 201 Determine that it is an end node or a shared node in a protection relationship, and if it is an end node, perform step 202; Node, step 203 is performed.
  • Step 202 The node is used as an end node, and when a state change occurs in the corresponding working entity or the protection entity, the node reports the state change information, and the process ends.
  • the node if the node does not change its own working state or the protection entity, the node periodically reports the status information to the controller.
  • the status change information may include: fault status information, and/or management status information, and the message structure of the status change information, as shown in Table 3, includes:
  • the node may also perform a switching operation according to an existing linear protection mechanism (negotiation between two nodes), specifically: if the protection switching lock clear state (UnLOP), when the node detects that the working entity is faulty, immediately The APS (SF) packet is sent to the peer node, and the protection switch is performed. If the protection switch lock state (LOP) is used, the APS (LOP) is sent to the peer node immediately, and the protection switching operation does not occur at both ends of the node.
  • Step 203 The node is a shared node, and when the shared protection relationship changes, the sharing relationship information is reported.
  • the sharing relationship information includes: a protection entity ID, a preemptitive priority, and a shared resource ID, such as: a slot ID, and the format of the message is as shown in Table 4:
  • Table 4 Preferably, when the self-sharing relationship does not change or the sharing relationship configuration is not received, the current status information is periodically reported to the controller.
  • Embodiment 3 The sharing protection method provided by the embodiment of the present invention, as shown in FIG. 3, includes:
  • Step 301 Each node determines that it is an end node or a shared node in the protection relationship. If it is an end node, step 302 is performed; if it is a shared node, step 303 is performed. Step 302: Protect the end node on the entity, determine whether the corresponding working entity or the protection entity changes, and if yes, report the state change information to the controller, and perform step 304; No. 'J, periodically report to the controller Status information, ending the process flow.
  • the protection entity is set to the protection switching lock state (LOP) in the initial state.
  • LOP protection switching lock state
  • Step 303 The shared protection relationship is changed on the shared node, and the shared node reports the shared protection relationship to the controller. If no change occurs in the state and the shared relationship, the end node or the shared node periodically reports the current state and the shared relationship. information.
  • Step 304 The controller receives status change information reported by the end node, and receives
  • the state change information may include: fault state information, or a management command state.
  • Step 305 The controller determines, according to the state change information, the sharing relationship information, and a priority rule, a protection entity that occupies a shared resource, and determines a state of the end node and/or the shared node of the protection entity.
  • the controller determines and sets the state of each protection entity according to the preemption priority set by each protection entity and/or the priority of the reported failure type or management command.
  • the controller sends a protection switching lock clear command (UnLOP) to the upper node of the protection entity, and
  • UnLOP protection switching lock clear command
  • the shared node sends the connection behavior of the protection entity or the occupation of the shared resource, that is, the establishment of a new forwarding flow entry.
  • protection switching lock state (LOP) is sent to the upper node of the protection entity that originally occupied the shared resource, and the protection entity connection command is deleted or deleted in the shared node; The protection switching state of the protection entity does not change.
  • the method may further include:
  • the controller receives the fault recovery state reported by the protection entity end node;
  • the controller sends a protection switching lock (LOP) command to the upper node of the protection entity, and sends the protection entity connection deletion or flow entry deletion command to the shared node, and performs status on other protection entities that need to share resources. Reset and deliver.
  • LOP protection switching lock
  • the transmission service on the working entity is immediately switched to the protection entity, and one node of the protection entity sends the node to the opposite node.
  • the APS information is used to negotiate the protection status. If the protection entity is in the protection switching lock state (LOP), the service cannot be switched.
  • LOP protection switching lock state
  • Step 401 Configure a PI and P2 shared protection relationship on the shared node BC, and configure a P2 and P3 shared protection relationship on the shared node FG, and set the preemption priority order of the shared node BC and the shared node FG to P1>P2>P3.
  • the protection switching state is defaulted to the protection switching lock state (LOP).
  • each end node (A, D, E, H, I, J) and the shared node (B, C, F, G) of the protection entity report normal status information to the controller, or between the protection entities. Share relationship information, and preemption priority information set by the protection entity.
  • Step 402 When any one end node detects that the link is faulty, the end node sends the link fault information to the controller.
  • the end node A or D when the end node A or D detects that the W1 link is faulty, as shown in Figure 5, the end node A or D reports the W1 link fault information (SF-W) to the controller through the status message.
  • SF-W W1 link fault information
  • Step 403 The controller determines, according to the link fault information reported by the end node, and the shared protection relationship information reported by the shared node, the shared resource of the end node.
  • the controller determines whether the end node A or D can use the shared node BC segment.
  • the shared resource if available, the controller will issue an UnLOP management command to the end node A or D; otherwise, the controller delivers the command to the shared node B or C. . .
  • the determining whether the end node A or D can use the shared resource of the shared node BC may be: determining whether the end node receives the LOP management command of the protection entity delivered by another management system, because the management LOP command The priority is higher than the SF-W priority, so the information reported by the A or D to the controller is the LOP state, so the controller does not issue the UnLOP management command to the A and D, and the service on the A or D cannot The handover operation is performed; at the same time, the connection establishment or flow entry of the P1 is sent to the shared node B or C;
  • Step 404 When the end node VIII, D receives the UnLOP management command, sets its state to the protection UnLOP state; and if a fault occurs on the corresponding working entity, the protection switching is immediately started, and the service is switched to the P1 transmission;
  • the A or D end node will send an APS (SF-W) message to the peer node D or A to perform state negotiation between the two nodes; and the shared node B or C receives After the PI connection establishment command is issued by the controller, the P1 connection establishment or the flow entry is added.
  • Step 405 4.
  • the nodes I and J at both ends of the W2 detect the fault or the management system issues the handover command. , as shown in FIG. 6; then the nodes I and J at both ends immediately report the fault status or management command status information of W2 to the controller;
  • Step 406 After the controller receives the W2 fault information reported by I and J, the controller analyzes and judges according to the SMP priority level, because the preemption priority of P1 is higher than the preemption priority of P2, so the controller determines that the segment The shared resource (BC) is still used by P1, so the protection switching lock state (LOP) command is still sent to the I and J nodes;
  • BC segment The shared resource
  • LOP protection switching lock state
  • Step 407 Since the I, J protection switching lock state is unchanged, the service on the W2 cannot be switched to the P2 transmission; when the fault state disappears on the W1, the nodes A or D on both ends of the W1 immediately report the Normal status information to the controller. After receiving the status information, the controller immediately sends an LOP command to A or D, and A or D re-cuts the P1 service back to its working entity W1 for transmission;
  • Step 408 If the I or J still reports the SF-W status information to the controller, the controller sends an UnLOP command to the I or J, and sends a P2 connection establishment or corresponding flow entry to the shared node B or C. Add force command;
  • Step 409 When B or C receives the P2 connection establishment command sent by the controller, the corresponding flow entry is added to the shared node B or C; and the end node I or J receives the UnLOP command sent by the controller. After that, the service on W2 is switched to the protection entity P2 for transmission; as shown in FIG. Embodiment 5
  • the shared protection system provided by the embodiment of the present invention, as shown in FIG. 8, includes: a node 81 and a controller 82;
  • the node 81 is configured to determine that the end node in the protection relationship is a shared node, and if it is an end node, when the working state or the protection entity changes, the fault state information is reported to the controller; When the shared protection relationship changes, the shared protection relationship is reported to the controller;
  • the controller 82 is configured to receive state change information reported by the node, and share the relationship And determining, according to the state change information, the sharing relationship information, and the SMP (Shared Mesh Protection) priority rule, the protection entity occupying the shared resource, and determining the state of the end node or the shared node of the protection entity.
  • SMP Shared Mesh Protection
  • the state change information may include: fault state information, or a management command state.
  • the node includes:
  • the determining module is configured to determine that it is an end node in the protection relationship or a shared node; and the status reporting module is configured to be an end node, and when the status of the corresponding working entity or the protection entity changes, the status change information is reported; If it is a shared node, when the shared protection relationship changes, the sharing relationship information is reported.
  • the node further includes: a handover execution module, configured to perform a handover operation; and a protection switching lockout state (UnLOP), when the one-end node detects that the working entity is faulty, immediately sends an APS (SF) report to the opposite node.
  • a handover execution module configured to perform a handover operation
  • a protection switching lockout state (UnLOP)
  • SF protection switching lockout state
  • the status reporting module is specifically configured to report the fault status or management status information to the working entity or the end-to-end path of the protection entity to the controller when the status of the working or protection entity changes.
  • the packet structure as shown in Table 3; or when the shared relationship changes or the shared relationship is just configured on the shared node, the shared node immediately reports the shared protection entity ID to the controller, preemptive priority and shared resource ID.
  • the time slot ID the packet format is as shown in Table 4; if there is no state change, the shared node or the end node is protected on the entity, and the current state information is periodically reported to the controller.
  • the determining module and the switching execution module may be implemented by hardware such as a DSP or a CPU; and the status reporting module may be implemented by a hardware cooperation interface such as a DSP or a CPU.
  • the controller includes: a receiving module configured to receive state change information and share relationship information;
  • the state analysis module is configured to determine, according to the state change information, the sharing relationship information, and a priority rule, a protection entity that occupies a shared resource, and determine a state of the end node and/or the shared node of the protection entity.
  • the controller further includes: a command issuing module, configured to send a protection switching lock state to the protection entity end node that needs to change the protection switching state according to the SMP protocol state priority analysis
  • LOP lock-and-forward lock-off state
  • UnLOP lock-and-forward lock-off state
  • the controller further includes: a path calculation module, configured to perform path calculation according to the topology information on the network, and send the calculated path information to each related node.
  • a path calculation module configured to perform path calculation according to the topology information on the network, and send the calculated path information to each related node.
  • the command issuing module is specifically configured to determine, according to the SMP priority analysis, which state the protection entities should be in: protection switching lock state (LOP), protection switching lock clear state (UnLOP), for each of the sharing relationships
  • LOP protection switching lock state
  • UnLOP protection switching lock clear state
  • the controller directly sets the protection entity with the shared relationship to "protection switching lock state LOP", so-called “protection switching”.
  • “Locked state” means that the protected service cannot be switched to the protected entity for transmission, and the shared protection resource is occupied; and the "protection switching lock clear state (UnLOP)" is used to cancel the original protection switching lock command. It has no effect on other management commands, unlike the existing "Clear" command;
  • the state analysis module and the path calculation module may be implemented by hardware such as a DSP or a CPU.
  • the receiving module and the command issuing module can be implemented by a hardware cooperation interface such as a DSP or a CPU.

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Abstract

本发明公开了一种共享保护方法、系统及装置,其中方法包括:控制器接收状态变化信息以及共享关系信息(101);所述控制器根据所述状态变化信息、所述共享关系信息、以及优先级规则,确定占用共享资源的保护实体,并确定所述保护实体的端节点和/或共享节点的状态(102)。

Description

一种共享保护方法、 装置及系统 技术领域
本发明涉及移动通信领域中, 尤其涉及一种共享保护方法、 装置及系统。 背景技术
目前, 在共享保护机制中, 主要通过多个保护实体所共享节点自身检测到 或被通告各保护实体上状态信息,共享节点对各个保护实体再根据 SMP优先级 的抢占规则对当前状态进行分析和处理,通过特定控制 APS传送通道通告给共 享该段资源的保护实体上端节点。 可见, 现有技术中提供的共享保护方法中, 需要共享节点和端节点之间建立 APS控制传送通道, 进行倒换状态协商过程; 并且共享节点支持复杂的 SMP优先级分析判断功能;通过各个共享节点上的控 制面进行信令协商来实现共享保护。
但是, 上述的共享保护方法, 需要在每个共享节点实现复杂的路由和信令 协议。 发明内容
有鉴于此, 本发明提供一种共享保护方法、 装置及系统, 能增加共享节点 的透明性。
为达到上述目的, 本发明的技术方案是这样实现的:
本发明提供了一种共享保护方法, 该方法包括:
控制器接收状态变化信息以及共享关系信息;
所述控制器根据所述状态变化信息、 所述共享关系信息、 以及优先级规 则, 确定占用共享资源的保护实体, 并确定所述保护实体的端节点和 /或共 享节点的状态。
上述方案中, 所述状态变化信息包括: 工作实体和保护实体上端到端的 状态、 以及管理命令;
所述共享关系信息包括: 保护实体共享的链路资源、 以及所述保护实体 的标识 (ID ) 。
上述方案中, 所述确定占用共享资源的保护实体, 并确定所述保护实体 的端节点和 /或共享节点的状态之后, 所述方法还包括:
向需要改变保护倒换状态的节点, 下发保护切换锁定态 LOP或保护倒 换锁定清除态 UnLOP指令; 和 /或, 向共享节点下发保护实体的连接的建立 或删除操作管理命令。
本发明提供了一种共享保护方法, 所述方法包括:
判断自身为保护关系中的端节点或共享节点, 若为端节点, 则当对应的 工作实体或者保护实体发生状态变化时, 所述节点上报状态变化信息;
若为共享节点, 则当共享保护关系发生变化时, 上报共享关系信息。 上述方案中, 所述方法还包括:
若接收到保护倒换锁定清除态 UnLOP指令, 则所述节点检测到工作实 体出现故障时, 向对端节点发送状态协商报文并进行保护切换;
若接收到保护切换锁定态 LOP指令, 则所述节点向对端节点发送 LOP 状态协商报文, 所述节点及其对端节点均不发生保护切换操作。
本发明提供了一种共享保护方法, 所述方法包括:
节点判断自身为保护关系中的端节点或为共享节点, 若为端节点, 则当 对应的工作实体或者保护实体发生状态变化时,所述节点向控制器上报状态 变化信息; 若为共享节点, 则当共享保护关系发生变化时, 所述节点向控制 器上报所述共享关系信息;
所述控制器接收作为端节点的所述节点上报的所述状态变化信息, 以及 接收作为共享节点的所述节点上报的所述共享关系信息;
所述控制器根据所述状态变化信息、 所述共享关系信息、 以及 SMP优 先级规则, 确定占用共享资源的保护实体, 并确定所述保护实体的端节点和 /或共享节点的状态。 本发明还提供了一种控制器, 所述控制器包括: 状态分析模块, 用于接 收状态变化信息以及共享关系信息, 根据所述状态变化信息、 所述共享关系 信息、 以及优先级规则, 确定占用共享资源的保护实体, 并确定所述保护实 体的端节点和 /或共享节点的状态。
上述方案中, 所述状态变化信息包括: 工作实体和保护实体上端到端的 状态、 以及管理命令;
所述共享关系信息包括: 保护实体共享的链路资源、 以及所述保护实体 的 ID。
上述方案中, 所述控制器还包括: 命令下发模块, 用于确定占用共享资 源的保护实体, 并确定所述保护实体的端节点或共享节点的状态后, 向需要 改变保护倒换状态的保护实体端节点下发保护切换锁定态 LOP或保护倒换 锁定清除态 UnLOP; 和 /或, 向中间共享节点下发确定保护实体的连接的建 立或删除操作管理命令。
本发明还提供了一种节点, 所述节点包括: 状态上报模块, 用于判断自 身为保护关系中的端节点、 或为共享节点, 若为端节点, 则当对应的工作实 体或者保护实体发生状态变化时, 上报状态变化信息; 若为共享节点, 则当 共享保护关系发生变化时, 上报共享关系信息。
上述方案中, 所述节点还包括: 切换执行模块, 用于进行切换操作; 若 接收到 UnLOP指令, 则所述节点检测到工作实体出现故障时, 向对端节点 发送状态协商报文, 并进行保护切换;
若接收到保护切换锁定态 LOP指令, 则向对端节点发送 LOP状态协商 报文, 自身及其对端节点均不发生保护切换操作。
本发明提供了一种共享保护系统,所述系统包括: 节点及控制器; 其中, 所述控制器为上述方案中所述控制器; 所述节点为上述方案中所述节 点。
本发明所提供共享保护方法、装置及系统,能控制器接收状态变化信息, 以及接收共享关系信息; 所述控制器根据所述状态变化信息、 所述共享关系 信息、 以及优先级规则, 确定占用共享资源的保护实体, 并确定所述保护实 体的端节点或共享节点的状态。 釆用本发明, 可以简化共享节点的复杂性, 避免了端节点和共享节点之间 APS 状态协商过程, 增加了共享节点的透明 性。 附图说明 图 1为本发明实施例共享保护方法流程示意图一;
图 2为本发明实施例共享保护方法流程示意图二;
图 3为本发明实施例共享保护方法流程示意图三;
图 4为本发明实施例使用场景示意图一;
图 5为本发明实施例使用场景示意图二;
图 6为本发明实施例使用场景示意图三;
图 7为本发明实施例使用场景示意图四;
图 8为本发明实施例系统组成结构示意图。 具体实施方式
下面结合附图及具体实施例对本发明再作进一步详细的说明。
实施例一、
本发明提供的共享保护方法中控制器的操作流程, 如图 1所示, 包括: 步骤 101 : 控制器接收状态变化信息以及共享关系信息。
这里, 所述状态变化信息为: 各个端节点向所述控制器上报的所述端节 点端到端实体上的状态变化信息; 其中, 所述状态变化信息可以包括: 工作 实体和保护实体上端到端的状态、 以及管理命令等。
所述共享关系信息为: 各个共享节点向所述控制器上报的信息, 可以包 括保护实体共享的链路资源、 以及所述保护实体的标识 ID。
步骤 102: 所述控制器根据所述状态变化信息、 所述共享关系信息、 以 及优先级规则, 确定占用共享资源的保护实体, 并确定所述保护实体的端节 点和 /或共享节点的状态。
这里, 所述确定所述保护实体的端节点和 /或共享节点的状态可以包括: 判断各保护实体处于的保护状态,根据确定的保护状态向保护实体上各个的 端节点下发保护切换锁定 (LOP, Lock of protection ) 指令或保护倒换锁定 解除 (UnLOP, Unlock of protection )指令; 和 /或, 向共享节点下发可以占用 该共享资源的保护实体的连接建立或删除。
其中, 所述保护状态包括: 保护倒换锁定态 (LOP ) 以及保护倒换锁定 清除态 (UnLOP)。
所述保护实体的连接建立或删除可以为: 添加或删除相应的流表项, 从 而确保在同一时刻只有一个保护实体占用该段共享资源。
优选地, 共享关系的每个保护实体的初始状态可以为: 设置为保护倒换 锁定态(LOP ) , 或者在共享保护关系配置好由控制器直接将具有共享关系 的保护实体设为保护倒换锁定态 LOP; 其中, 所述 LOP为被保护的业务不 能倒换到保护实体上传送, 占用共享保护资源, 比如, 某一保护实体处于 LOP时, 所述保护实体不能使用共享资源,从而确保共享资源上同一时间只 能确保一个保护实体所占用。
所述 UnLop 为仅用来将原来保护倒换锁定命令进行解除操作, 而对其 他管理命令不产生影响, 不同于现有的 Clear命令。
优选地, 所述保护切换锁定态(L0P )指令和所述保护倒换锁定清除态 ( UnLOP ) 指令, 可以包括: SDN 数据包 (Packer ) 头 (Header ) 以及命 令, 比如, 如表 1所示,
SDN Packet header
Switch state (LOP , UnLOP) command
protection entity ID
表 1
所述确定共享节点的状态可以包括: 向中间共享节点下发确定保护实体 的连接的建立或删除操作管理命令, 也即为流表项添加或删除命令, 其命令 报文格式如表 2所示,
SDN Packet header
Occupied protection entity ID
Flow table delete or add command
表 2
优选地, 所述控制器还可以根据网络拓朴信息进行路径计算, 将计算得 到的路径信息下发至端节点和 /或共享节点上。 实施例二、
本发明提供的共享保护方法中节点的操作流程, 如图 2所示, 包括: 步骤 201 : 判断自身为保护关系中的端节点或共享节点, 若为端节点, 则执行步骤 202; 若为共享节点, 则执行步骤 203。
这里, 所述判断为现有技术, 这里不做赘述。
步骤 202: 所述节点作为端节点, 当对应的工作实体或者保护实体发生 状态变化时, 所述节点上报状态变化信息, 结束处理流程。
这里, 所述若所述节点的自身工作状态或者保护实体没有发生变化, 则 所述节点周期性的向控制器上报状态信息。
所述状态变化信息可以包括: 故障状态信息、 和 /或管理状态信息, 所 述状态变化信息的报文结构, 如表 3所示, 包括:
SDN Packet header state information
Working or protection entity ID
表 3
优选地, 所述节点还可以根据现有线性保护机制 (两端节点协商)进行 切换操作, 具体为: 若为保护倒换锁定清除态(UnLOP ) , 则当节点检测到 工作实体出现故障时, 立即向对端的节点发送 APS ( SF )报文, 并进行保护 切换; 若为保护切换锁定态 (LOP), 立即向对端节点发送 APS(LOP),其两端 节点都不发生保护切换操作。 步骤 203 : 所述节点作为共享节点, 当共享保护关系发生变化时, 上报 共享关系信息。
这里, 所述共享关系信息包括: 保护实体 ID、抢占优先级(preemptitive priority ) 和共享资源 ID, 如: 时隙 ID, 其^艮文格式如表 4所示:
SDN Packet header
Shared protection entities ID
Shared Resource ID
Preemptitive priority
表 4; 优选地, 当自身共享关系没有发生变化或没有收到共享关系配置时, 周 期性的向控制器上报当前状态信息。
实施例三、 本发明实施例提供的共享保护方法, 如图 3所示, 包括:
步骤 301 : 各个节点判断自身为保护关系中的端节点或共享节点, 若为 端节点, 则执行步骤 302; 若为共享节点, 则执行步骤 303。 步骤 302: 保护实体上的端节点, 判断对应的工作实体或者保护实体是 否发生变化, 若存在, 则向控制器上报状态变化信息, 执行步骤 304; 否贝 'J, 周期性的向控制器上报状态信息, 结束处理流程。
这里, 所述保护实体在初始态时, 都设为保护倒换锁定态 (LOP ) 。 当某一保护实体上端节点检测到其对应的工作实体存在故障或故障消 失或者收到网管下发管理命令时,该端节点向其控制器上报该故障状态或故 障消失的状态通告报文或管理命令信息。
步骤 303 : 共享节点上共享保护关系发生变化, 所述共享节点向控制器 上报共享保护关系; 若没有发生状态和共享关系的变化时, 则这些端节点或 共享节点定期地上报当前状态和共享关系信息。
步骤 304: 所述控制器接收所述端节点上报的状态变化信息, 以及接收 所述状态变化信息可以包括: 故障状态信息、 或管理命令状态。
步骤 305: 所述控制器根据所述状态变化信息、 所述共享关系信息、 以 及优先级规则, 确定占用共享资源的保护实体, 并确定所述保护实体的端节 点和 /或共享节点的状态。
所述控制器根据各保护实体设定的抢占优先级和 /或所上报故障类型或 管理命令的优先级, 进行各个保护实体状态的判断和设定。
具体的,若发生状态改变的保护实体的优先级大于当前占用共享资源的 保护实体的优先级,则所述控制器将向该保护实体上端节点下发保护倒换锁 定清楚命令(UnLOP ), 并向共享节点下发该保护实体的连接行为或共享资 源的占用即新的转发流表项的建立;
另外,将向原来占用共享资源的保护实体上端节点下发保护倒换锁定状 态 (LOP ) , 并在共享节点下发删除该保护实体连接命令或删除该流表; 否 贝 'J, 则保持现有保护实体的保护倒换状态不变。
优选地, 步骤 305完成后, 还可以包括:
当占用共享资源的保护实体所对应的工作实体上故障消失时,控制器接 收到该保护实体端节点所上报的故障恢复状态;
所述控制器将向该保护实体上端节点下发保护倒换锁定(LOP )命令, 并向共享节点下发该保护实体连接删除或流表项删除命令,并对其他需要共 享资源的保护实体进行状态重新设定和下发。
对于保护实体上端节点来说, 当其对应工作实体存在故障且保护实体又 处于 UnLOP状态时, 则立即将工作实体上传送业务切换到保护实体上, 且 该保护实体上一端节点向对端节点发送 APS信息, 进行保护状态的协商; 若该保护实体处于保护倒换锁定态 (LOP ) , 则不能进行业务的切换。 实施例四、
本实例以图 4所示, 在 SDN控制器上实现共享保护场景为例, 具体描 述了该共享保护机制的具体过程或主要特征, 包括: 步骤 401 : 在共享节点 BC上配置 PI和 P2共享保护关系, 在共享节点 FG上配置 P2和 P3共享保护关系, 设置共享节点 BC和共享节点 FG上的 抢占优先级顺序为 P1>P2>P3, 在每个共享保护实体的端节点, 将保护倒换 状态默认为保护倒换锁定态 (LOP ) 。
在正常情况下, 保护实体的各个端节点 (A、 D、 E、 H、 I、 J ) 和共享 节点 (B、 C、 F、 G ) 向控制器上报正常状态信息、 或保护实体之间的共享 关系信息、 以及保护实体设定的抢占优先级信息。
步骤 402: 当任意一个端节点检测到链路出现故障时, 所述端节点将链 路故障信息发送至控制器。
比如, 端节点 A或 D检测到 W1链路出现故障时, 如图 5所示; 则端 节点 A或 D通过状态报文, 向控制器上报该 W1链路故障信息 (SF-W)。
步骤 403 : 所述控制器根据所述端节点上报的链路故障信息, 以及所述 共享节点上报的共享保护关系信息, 确定所述端节点的共享资源。
比如, 控制器收到所述端节点 A或 D上报的链路故障信息、 以及共享 节点 B和 C上报的共享保护关系信息后, 判断所述端节点 A或 D是否可以 使用共享节点 BC段的共享资源, 若可以, 则所述控制器将向所述端节点 A 或 D下发 UnLOP管理命令;否则,所述控制器向所述共享节点 B或 C下发。。。
其中, 所述判断所述端节点 A或 D是否可以使用共享节点 BC端的共 享资源可以为:判断所述端节点是否收到由其他管理系统下发的保护实体的 LOP管理命令, 由于管理 LOP命令的优先级高于 SF-W优先级, 所以其 A 或 D将向控制器所上报的信息是 LOP状态,所以控制器就不向 A和 D下发 UnLOP管理命令, A或 D上业务就不能进行切换操作; 同时, 将向共享节 点 B或 C下发 P1的连接建立或流表项建立;
步骤 404: 当端节点八, D接收到 UnLOP管理命令后, 将其状态设定 为保护 UnLOP态; 且对应工作实体上出现故障, 则立即启动保护倒换, 将 其业务切换到 P1上传送; 同时, A或 D端节点将向对端节点 D或 A发送 APS(SF-W)报文,进行两端节点之间的状态协商; 而共享节点 B或 C接收到 该控制器所下发 PI连接建立命令后, 进行 P1连接建立或流表项的添加; 步骤 405: 4艮如此时 W2两端节点 I、 J也检测到故障或管理系统下发了 切换命令时, 如图 6所示; 则两端节点 I、 J立即向控制器上报 W2的故障状 态或管理命令状态信息;
步骤 406: 当控制器接收到 I、 J上报过来的 W2故障信息后, 控制器根 据 SMP优先级分析判断, 因 P1的抢占优先级高于 P2的抢占优先级, 所以 控制器判断出, 该段共享资源 (BC)仍然给 P1所使用, 所以仍向 I,J节点下发 保护倒换锁定状态 (LOP )命令;
步骤 407: 由于 I,J保护切换锁定状态不变, W2上业务不能切换到 P2 上传送; 当 W1上故障状态消失时, 则 W1上两端节点 A或 D将立即向控 制器上报 Normal状态信息, 则控制器接收到该状态信息后, 立即向 A或 D 下发 LOP命令, A或 D将 P1业务重新切回到其工作实体 W1上传送;
步骤 408: 由于 I或 J仍然向控制器上报 SF-W状态信息, 则控制器将 向 I或 J下发 UnLOP命令,且向共享节点 B或 C下发建立 P2连接建立或相 应流表项的添力口命令;
步骤 409: 当 B或 C接收到控制器所下发的 P2连接建立命令, 则在共 享节点 B或 C添加相应的流表项; 而端节点 I或 J接收到控制器所下发的 UnLOP命令后, 将 W2上业务切换到保护实体 P2上传送; 如图 7所示。 实施例五、
本发明实施例提供的共享保护系统, 如图 8所示, 包括: 节点 81 以及 控制器 82; 其中,
所述节点 81, 用于判断自身为保护关系中的端节点、 或为共享节点, 若为端节点, 则自身工作状态或者保护实体发生变化时, 向控制器上报故障 状态信息; 若为共享节点, 则自身共享保护关系发生变化时, 向控制器上报 共享保护关系;
所述控制器 82, 用于接收所述节点上报的状态变化信息, 以及共享关 系信息,根据所述状态变化信息、所述共享关系信息、以及 SMP( Shared Mesh Protection )优先级规则, 确定占用共享资源的保护实体, 并确定所述保护实 体的端节点或共享节点的状态。
这里, 所述状态变化信息可以包括: 故障状态信息、 或管理命令状态。 所述节点包括:
判断模块, 配置为判断自身为保护关系中的端节点、 或为共享节点; 状态上报模块, 配置为若为端节点, 则当对应的工作实体或者保护实体 发生状态变化时, 上报状态变化信息; 若为共享节点, 则当共享保护关系发 生变化时, 上报共享关系信息。
所述节点还包括: 切换执行模块, 用于进行切换操作; 若为保护倒换锁 定清除态(UnLOP ) , 则当一端节点检测到工作实体出现故障时, 立即向对 端节点发送 APS ( SF )报文, 并进行保护切换; 若为保护切换锁定态 (LOP), 立即向对端节点发送 APS ( LOP ) ,是其两端节点都不发生保护切换操作。
所述状态上报模块, 具体用于处于端节点, 其工作或保护实体发生状态 变化时,主动立即向控制器上报工作实体或保护实体上端到端路径上等故障 状态或管理状态信息, 其上报状态报文结构, 如表 3所示; 或者在共享节点 上共享关系发生变化或刚配置共享关系时, 由共享节点立即向控制器上报共 享保护实体 ID, 抢占优先级( preemptitive priority )和共享资源 ID, 如: 时 隙 ID, 其报文格式如表 4所示; 若无状态变化时, 则保护实体上共享节点 或端节点, 定期向控制器上报当前状态信息。
所述判断模块以及切换执行模块可以由 DSP、 CPU 等硬件实现; 所述 状态上报模块可以由 DSP或 CPU等硬件配合接口实现。
所述控制器包括: 接收模块, 配置为接收状态变化信息以及共享关系信 息;
状态分析模块, 配置为根据所述状态变化信息、 所述共享关系信息、 以 及优先级规则, 确定占用共享资源的保护实体, 并确定所述保护实体的端节 点和 /或共享节点的状态。 所述控制器还包括: 命令下发模块, 用于根据 SMP协议状态优先级分 析后, 向需要改变保护倒换状态的保护实体端节点下发保护切换锁定态
( LOP ) 和保占用; 护倒换锁定清除态 (UnLOP ) , 如表 1 所示; 和 /或向 中间共享节点下发确定保护实体的连接的建立或删除操作管理命令,也即为 流表项添加或删除命令, 其命令艮文格式, 如表 2所示。
所述控制器还包括: 路径计算模块, 用于根据网络上拓朴信息, 进行路 径计算, 将计算好的路径信息下发给各个相关节点上。
所述命令下发模块, 具体用于根据 SMP优先级分析, 来判断各保护实 体应该处于何种状态: 保护倒换锁定态 (LOP ) , 保护倒换锁定清除态 ( UnLOP) , 对于共享关系的每个保护实体来说, 其初始状态设为保护倒换 锁定态(LOP )或者在共享保护关系配置好, 由控制器直接将具有共享关系 的保护实体设为 "保护倒换锁定态 LOP ", 所谓 "保护倒换锁定态 ", 是指 被保护的业务不能倒换到保护实体上传送, 占用共享保护资源; 而" 保护倒 换锁定清除态 (UnLOP ) ",该命令仅用来将原来保护倒换锁定命令进行解 除操作, 而对其他管理命令不产生影响, 不同于现有的 "Clear"命令;
所述状态分析模块、 路径计算模块可以由 DSP、 CPU 等硬件实现。 所 述接收模块、 命令下发模块可以由 DSP、 CPU等硬件配合接口实现。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保护 范围。

Claims

权利要求书
1、 一种共享保护方法, 该方法包括:
控制器接收状态变化信息以及共享关系信息;
所述控制器根据所述状态变化信息、 所述共享关系信息、 以及优先级规 则, 确定占用共享资源的保护实体, 并确定所述保护实体的端节点和 /或共 享节点的状态。
2、 根据权利要求 1 所述的方法, 其中, 所述状态变化信息包括: 工作 实体和保护实体上端到端的状态、 以及管理命令;
所述共享关系信息包括: 保护实体共享的链路资源、 以及所述保护实体 的标识 ID。
3、 根据权利要求 2所述的方法, 其中, 所述确定占用共享资源的保护 实体, 并确定所述保护实体的端节点和 /或共享节点的状态之后, 所述方法 还包括:
向需要改变保护倒换状态的节点, 下发保护切换锁定态 LOP或保护倒 换锁定清除态 UnLOP指令; 和 /或, 向共享节点下发保护实体的连接的建立 或删除操作管理命令。
4、 一种共享保护方法, 所述方法包括:
判断自身为保护关系中的端节点或共享节点,
若为端节点, 则当对应的工作实体或者保护实体发生状态变化时, 所述 节点上报状态变化信息;
若为共享节点, 则当共享保护关系发生变化时, 上报共享关系信息。
5、 根据权利要求 4所述的方法, 其中, 所述方法还包括:
若接收到保护倒换锁定清除态 UnLOP指令, 则所述节点检测到工作实 体出现故障时, 向对端节点发送状态协商报文并进行保护切换;
若接收到保护切换锁定态 LOP指令, 则所述节点向对端节点发送 LOP 状态协商报文, 所述节点及其对端节点均不发生保护切换操作。
6、 一种共享保护方法, 所述方法包括:
节点判断自身为保护关系中的端节点或为共享节点, 若为端节点, 则当 对应的工作实体或者保护实体发生状态变化时,所述节点向控制器上报状态 变化信息; 若为共享节点, 则当共享保护关系发生变化时, 所述节点向控制 器上报所述共享关系信息;
所述控制器接收作为端节点的所述节点上报的所述状态变化信息, 以及 接收作为共享节点的所述节点上报的所述共享关系信息;
所述控制器根据所述状态变化信息、 所述共享关系信息、 以及 SMP优 先级规则, 确定占用共享资源的保护实体, 并确定所述保护实体的端节点和 /或共享节点的状态。
7、 一种控制器, 所述控制器包括:
接收模块, 配置为接收状态变化信息以及共享关系信息;
状态分析模块, 配置为根据所述状态变化信息、 所述共享关系信息、 以 及优先级规则, 确定占用共享资源的保护实体, 并确定所述保护实体的端节 点和 /或共享节点的状态。
8、 根据权利要求 7所述的控制器, 其中, 所述状态变化信息包括: 工 作实体和保护实体上端到端的状态、 以及管理命令;
所述共享关系信息包括: 保护实体共享的链路资源、 以及所述保护实体 的 ID。
9、 根据权利要求 8所述的控制器, 其中, 所述控制器还包括: 命令下 发模块, 配置为确定占用共享资源的保护实体, 并确定所述保护实体的端节 点或共享节点的状态后,向需要改变保护倒换状态的保护实体端节点下发保 护切换锁定态 LOP或保护倒换锁定清除态 UnLOP; 和 /或, 向中间共享节点 下发确定保护实体的连接的建立或删除操作管理命令。
10、 一种节点, 所述节点包括:
判断模块, 配置为判断自身为保护关系中的端节点、 或为共享节点; 状态上报模块, 配置为若为端节点, 则当对应的工作实体或者保护实体 发生状态变化时, 上报状态变化信息; 若为共享节点, 则当共享保护关系发 生变化时, 上报共享关系信息。
11、 根据权利要求 10所述的节点, 其中, 所述节点还包括: 切换执行 模块, 配置为进行切换操作; 若接收到 UnLOP指令, 则所述节点检测到工 作实体出现故障时, 向对端节点发送状态协商报文, 并进行保护切换; 若接收到保护切换锁定态 LOP指令, 则向对端节点发送 LOP状态协商 报文, 自身及其对端节点均不发生保护切换操作。
12、 一种共享保护系统, 所述系统包括: 节点及控制器; 其中, 所述控制器, 配置为接收状态变化信息以及共享关系信息; 根据所述状 态变化信息、 所述共享关系信息、 以及优先级规则, 确定占用共享资源的保 护实体, 并确定所述保护实体的端节点和 /或共享节点的状态;
所述节点, 配置为判断自身为保护关系中的端节点或共享节点, 若为端 节点, 则当对应的工作实体或者保护实体发生状态变化时, 所述节点上报状 态变化信息; 若为共享节点, 则当共享保护关系发生变化时, 上报共享关系 信息。
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