技术领域technical field
本发明涉及通信领域的网络协调保护技术，尤其涉及一种通过协调保护减少设备间光连接数量的方法及装置。The invention relates to network coordination and protection technology in the communication field, in particular to a method and device for reducing the number of optical connections between devices through coordination and protection.
背景技术Background technique
现有的分组传送网（PTN，Packet Transport Network）架构一般由骨干环、汇聚环和接入环或接入链组成，在采用PTN承载3GPP长期演进技术（LTE，Long Term Evolution）业务时，PTN网络常见的一种组网拓扑是双上联形式的组网拓扑结构，如图1所示。在图1所示的双上联组网拓扑中，通常会在核心层PTN设备和骨干汇聚设备上配置三层虚拟专用网（L3VPN，Layer3VirtualPrivate Network），在接入汇聚层上配置两层虚拟专用网（L2VPN，Layer2VirtualPrivate Network），采用L2VPN+L3VPN的方式进行LTE业务的承载和调度。The existing packet transport network (PTN, Packet Transport Network) architecture is generally composed of backbone rings, aggregation rings and access rings or access links. When PTN is used to carry 3GPP Long Term Evolution (LTE, Long Term Evolution) services, PTN A common networking topology in the network is a networking topology structure in the form of dual uplinks, as shown in FIG. 1 . In the dual uplink networking topology shown in Figure 1, a Layer 3 Virtual Private Network (L3VPN, Layer 3 Virtual Private Network) is usually configured on the core layer PTN device and backbone aggregation device, and a two-layer virtual private network is configured on the access aggregation layer. Network (L2VPN, Layer2VirtualPrivate Network), using L2VPN+L3VPN to bear and dispatch LTE services.
在现有的保护技术中，在PTN核心层设备（如图1中的PE1和PE2）与LTE核心网设备如信令网关（sGW，Signaling Gateway）/移动管理实体（MME，Mobility Management Entity）之间配置IP快速重路由（IP FRR，IP Fast ReRoute）保护，并采用双向转发检测（BFD，Bidirectional Forwarding Detection）机制来快速检测链路或节点故障。在PTN核心层L3VPN网络内，则配置标签交换路径（LSP，Label Switching Path）线性保护来保护内部链路故障，配置快速重路由（VPN FRR，Fast ReRoute）保护来保护PE节点故障，同时PE节点之间也采用BFD机制检测对端故障，以加快VPN FRR倒换的速度。在这种保护架构下，PTN核心层设备之间必须有光连接，以便在L3VPN内部光纤链路出现故障或者PTN核心设备与LTE核心网设备之间链路发生故障时，业务可以经由PE2绕行到PE1。In the existing protection technology, between PTN core layer equipment (PE1 and PE2 in Figure 1) and LTE core network equipment such as signaling gateway (sGW, Signaling Gateway)/mobility management entity (MME, Mobility Management Entity) Configure IP fast rerouting (IP FRR, IP Fast ReRoute) protection, and use bidirectional forwarding detection (BFD, Bidirectional Forwarding Detection) mechanism to quickly detect link or node failures. In the PTN core layer L3VPN network, configure label switching path (LSP, Label Switching Path) linear protection to protect internal link failures, configure fast rerouting (VPN FRR, Fast ReRoute) protection to protect PE node failures, and PE nodes The BFD mechanism is also used to detect peer failures to speed up VPN FRR switching. Under this protection architecture, there must be an optical connection between the PTN core layer devices, so that when the internal fiber link of the L3VPN fails or the link between the PTN core device and the LTE core network device fails, the service can be bypassed via PE2 to PE1.
为了保证PE1与PE2之间的带宽能够满足所有业务的保护需求，对应每一组骨干汇聚设备，需要有至少一对光纤进行连接，在实际应用中，为了保障业务的顺利进行，在PE1与PE2之间必须采用多对光纤进行连接，当网络规模较大时，这种组网拓扑结构将消耗非常多的光纤资源和设备接口资源。In order to ensure that the bandwidth between PE1 and PE2 can meet the protection requirements of all services, at least one pair of optical fibers must be connected to each group of backbone aggregation devices. Multiple pairs of optical fibers must be used for connection. When the network scale is large, this networking topology will consume a lot of optical fiber resources and device interface resources.
发明内容Contents of the invention
有鉴于此，本发明实施例期望提供一种通过协调保护减少设备间光连接数量的方法及装置，能够通过协调保护机制，减少对PTN核心层设备的光接口和光线数量需求。In view of this, the embodiment of the present invention expects to provide a method and device for reducing the number of optical connections between devices through coordinated protection, which can reduce the requirements for optical interfaces and light quantity of PTN core layer devices through the coordinated protection mechanism.
为达到上述目的，本发明的技术方案是这样实现的：In order to achieve the above object, technical solution of the present invention is achieved in that way:
本发明实施例提供了一种通过协调保护减少设备间光连接数量的方法，所述方法包括：An embodiment of the present invention provides a method for reducing the number of optical connections between devices through coordinated protection. The method includes:
PTN核心层设备检测与远端PE节点之间的故障；PTN core layer equipment detects failures between remote PE nodes;
当检测到所述PTN核心层设备与远端PE节点之间的链路出现故障时，将与故障相关的IP网段地址通知LTE核心网设备；When detecting that the link between the PTN core layer equipment and the remote PE node fails, notify the LTE core network equipment of the IP network segment address related to the failure;
LTE核心网设备接收到所述故障IP网段后，启动IP FRR保护将所述故障IP网段的路由切换到备用路由。After receiving the faulty IP network segment, the LTE core network device starts IP FRR protection to switch the route of the faulty IP network segment to a backup route.
上述方案中，所述将与故障相关的IP网段地址通知LTE核心网设备为：In the above scheme, the IP network segment address related to the failure is notified to the LTE core network equipment as:
将相关的故障IP网段地址，通过PTN核心层设备与LTE核心网设备之间的BFD协议扩展字段，通知到LTE核心网设备；Notify the relevant faulty IP network segment address to the LTE core network device through the BFD protocol extension field between the PTN core layer device and the LTE core network device;
其中，所述BFD协议扩展字段为：在原有BFD协议中增加用于描述发生故障的IP网段的可选字段；所述通知到LTE核心网设备为：将变化后的BFD协议报文发往LTE核心网设备；Wherein, the BFD protocol extension field is: increase the optional field used to describe the IP network segment where the failure occurs in the original BFD protocol; the notification to the LTE core network equipment is: send the changed BFD protocol message to LTE core network equipment;
对应的，所述LTE核心网设备接收到所述故障IP网段为：LTE核心网设备从接收到的BFD报文中解析出故障IP网段地址。Correspondingly, when the LTE core network device receives the faulty IP network segment, the LTE core network device resolves the address of the faulty IP network segment from the received BFD message.
上述方案中，所述方法还包括：In the above scheme, the method also includes:
PTN核心层设备检测与远端PE节点之间的故障是否消失；Check whether the fault between the PTN core layer equipment and the remote PE node disappears;
当检测到所述PTN核心层设备与远端PE节点之间的链路故障消失时，将所述IP网段地址从所述BFD协议扩展字段中删除，并将变化后的BFD协议报文发往LTE核心网设备；When it is detected that the link failure between the PTN core layer device and the remote PE node disappears, the IP network segment address is deleted from the BFD protocol extension field, and the changed BFD protocol message is sent to To LTE core network equipment;
对应的，所述LTE核心网设备未接收到故障IP网段地址时，启动IP FRR保护将路由回切。Correspondingly, when the LTE core network equipment does not receive the faulty IP network segment address, the IP FRR protection is started to switch the route back.
本发明实施例还提供了一种通过协调保护减少设备间光连接数量的方法，所述方法包括：The embodiment of the present invention also provides a method for reducing the number of optical connections between devices through coordinated protection, the method including:
PTN核心层设备检测与LTE核心网设备之间的故障；Fault detection between PTN core layer equipment and LTE core network equipment;
当检测到所述PTN核心层设备与LTE核心网设备的链路出现故障时，将与故障相关的IP网段地址通知远端PE节点；When detecting that the link between the PTN core layer equipment and the LTE core network equipment fails, notify the remote PE node of the IP network segment address related to the failure;
远端PE节点接收到所述故障IP网段后，启动VPN FRR保护将所述故障IP网段的路由切换到备用路由。After receiving the faulty IP network segment, the remote PE node starts VPN FRR protection to switch the route of the faulty IP network segment to a backup route.
上述方案中，所述将与故障相关的IP网段地址通知远端PE节点为：In the above scheme, the notification of the IP network segment address related to the fault to the remote PE node is as follows:
将相关的故障IP网段地址，通过PTN核心层设备与远端PE节点之间的BFD协议扩展字段，通知到远端PE节点；Notify the relevant faulty IP network segment address to the remote PE node through the BFD protocol extension field between the PTN core layer device and the remote PE node;
其中，所述BFD协议扩展字段为：在原有BFD协议中增加用于描述发生故障的IP网段的可选字段；所述通知到远端PE节点为：将变化后的BFD协议报文发往远端PE节点；Wherein, the BFD protocol extension field is: adding an optional field used to describe the IP network segment where the failure occurred in the original BFD protocol; the notification to the remote PE node is: sending the changed BFD protocol message to Remote PE node;
对应的，所述远端PE节点接收到所述故障IP网段为：远端PE节点从接收到的BFD报文中解析出故障IP网段地址。Correspondingly, when the remote PE node receives the faulty IP network segment, the remote PE node resolves the address of the faulty IP network segment from the received BFD message.
上述方案中，所述方法还包括：In the above scheme, the method also includes:
PTN核心层设备检测与LTE核心网设备之间的故障是否消失；Whether the fault between PTN core layer equipment detection and LTE core network equipment disappears;
当检测到所述PTN核心层设备与LTE核心网设备的链路故障消失时，将所述IP网段地址从所述BFD协议扩展字段中删除，并将变化后的BFD协议报文发往远端PE节点；When it is detected that the link failure between the PTN core layer equipment and the LTE core network equipment disappears, the IP network segment address is deleted from the BFD protocol extension field, and the changed BFD protocol message is sent to the remote End PE node;
对应的，所述远端PE节点未接收到故障IP网段地址时，启动VPN FRR保护将路由回切。Correspondingly, when the remote PE node does not receive the address of the faulty IP network segment, the VPN FRR protection is started to switch the route back.
本发明实施例还提供了一种通过协调保护减少设备间光连接数量的装置，所述装置包括：检测单元、通知单元、切换单元，其中，所述检测单元、通知单元位于PTN核心层设备，所述切换单元，位于LTE核心网设备；The embodiment of the present invention also provides an apparatus for reducing the number of optical connections between devices through coordinated protection, the apparatus includes: a detection unit, a notification unit, and a switching unit, wherein the detection unit and the notification unit are located in the PTN core layer equipment, The switching unit is located in the LTE core network equipment;
所述检测单元，用于检测与远端PE节点之间的故障；The detection unit is used to detect a fault with a remote PE node;
所述通知单元，用于当检测到所述PTN核心层设备与远端PE节点之间的链路出现故障时，将与故障相关的IP网段地址通知LTE核心网设备；The notification unit is configured to notify the LTE core network device of an IP network segment address related to the fault when it is detected that the link between the PTN core layer device and the remote PE node fails;
所述切换单元，用于在接收到所述故障IP网段后，启动IP FRR保护将所述故障IP网段的路由切换到备用路由。The switching unit is configured to start IP FRR protection to switch the route of the faulty IP network segment to an alternate route after receiving the faulty IP network segment.
上述方案中，所述检测单元，还用于检测所述PTN核心层设备与远端PE节点之间的链路故障是否消失；In the above solution, the detection unit is also used to detect whether the link fault between the PTN core layer device and the remote PE node disappears;
所述通知单元，还用于当检测到所述PTN核心层设备与远端PE节点之间的链路故障消失时，将所述IP网段地址从所述BFD协议扩展字段中删除，并将变化后的BFD协议报文发往LTE核心网设备；The notification unit is further configured to delete the IP network segment address from the BFD protocol extension field when it is detected that the link failure between the PTN core layer device and the remote PE node disappears, and send The changed BFD protocol message is sent to the LTE core network device;
所述切换单元，还用于当未接收到故障IP网段地址时，启动IP FRR保护将路由回切。The switching unit is also used to start IP FRR protection and switch back the route when the faulty IP network segment address is not received.
本发明实施例还提供了一种通过协调保护减少设备间光连接数量的装置，所述装置包括：检测单元、通知单元、切换单元，其中，所述检测单元、通知单元位于PTN核心层设备，所述切换单元，位于远端PE节点；The embodiment of the present invention also provides an apparatus for reducing the number of optical connections between devices through coordinated protection, the apparatus includes: a detection unit, a notification unit, and a switching unit, wherein the detection unit and the notification unit are located in the PTN core layer equipment, The switching unit is located at a remote PE node;
所述检测单元，用于检测与LTE核心网设备之间的故障；The detection unit is used to detect faults with LTE core network equipment;
所述通知单元，用于当检测到所述PTN核心层设备与LTE核心网设备的链路出现故障时，将与故障相关的IP网段地址通知远端PE节点；The notification unit is used to notify the remote PE node of the IP network segment address related to the failure when it is detected that the link between the PTN core layer equipment and the LTE core network equipment fails;
所述切换单元，用于在接收到所述故障IP网段后，启动VPN FRR保护将所述故障IP网段的路由切换到备用路由。The switching unit is configured to start VPN FRR protection to switch the route of the faulty IP network segment to an alternate route after receiving the faulty IP network segment.
上述方案中，所述检测单元还用于检测所述PTN核心层设备与LTE核心网设备的链路故障是否消失；In the above solution, the detection unit is also used to detect whether the link failure between the PTN core layer equipment and the LTE core network equipment disappears;
所述通知单元，还用于当检测到所述PTN核心层设备与LTE核心网设备的链路故障消失时，将所述IP网段地址从所述BFD协议扩展字段中删除，并将变化后的BFD协议报文发往远端PE节点；The notification unit is also used to delete the IP network segment address from the BFD protocol extension field when it is detected that the link failure between the PTN core layer equipment and the LTE core network equipment disappears, and change the changed The BFD protocol message sent to the remote PE node;
所述切换单元，还用于当未接收到故障IP网段地址时，启动VPN FRR保护将路由回切。The switching unit is also used to start VPN FRR protection to switch the route back when the faulty IP network segment address is not received.
本发明实施例所提供的通过协调保护减少设备间光连接数量的方法及装置，根据PTN核心层设备与LTE核心网设备之间的BFD协议，以及PTN网络内部L3VPN的PE之间的BFD协议，检测PTN核心层设备与远端PE节点之间的故障以及PTN核心层设备与LTE核心网设备之间的故障，并通过故障通知机制，使得PTN网络内部的L3VPN中PTN核心层设备与远端PE节点之间某个IP网段路由发生的故障可以传递到LTE核心网设备，同时PTN核心层设备与LTE核心网设备之间的故障也能够通知到PTN内部的L3VPN远端PE节点，以启动LTE核心网设备与远端PE节点的路由倒换协调保护，使得LTE业务不需要在两端PTN核心层设备之间绕行，从而节省PTN核心层设备光连接数量。According to the method and device for reducing the number of optical connections between devices through coordinated protection provided by the embodiments of the present invention, according to the BFD protocol between the PTN core layer device and the LTE core network device, and the BFD protocol between PEs of the L3VPN inside the PTN network, Detect the fault between the PTN core layer equipment and the remote PE node, as well as the fault between the PTN core layer equipment and the LTE core network equipment, and through the fault notification mechanism, make the PTN core layer equipment in the L3VPN inside the PTN network and the remote PE node A fault in an IP network segment route between nodes can be transmitted to the LTE core network equipment, and a fault between the PTN core layer equipment and the LTE core network equipment can also be notified to the L3VPN remote PE node inside the PTN to start LTE The routing switching coordination and protection between the core network equipment and the remote PE node makes it unnecessary for LTE services to bypass between the PTN core layer equipment at both ends, thereby saving the number of optical connections of the PTN core layer equipment.
附图说明Description of drawings
图1为一种现有PTN网络的双上联形式的组网拓扑图；Fig. 1 is a kind of networking topological diagram of the dual uplink form of existing PTN network;
图2为本发明实施例一PTN核心层设备与远端PE节点之间发生故障的组网拓扑图；Fig. 2 is the networking topological diagram of the failure occurring between the PTN core layer equipment and the remote PE node according to the embodiment of the present invention;
图3为本发明实施例一通过协调保护减少设备间光连接数量的方法流程示意图；3 is a schematic flowchart of a method for reducing the number of optical connections between devices through coordinated protection according to Embodiment 1 of the present invention;
图4为本发明实施例二通过协调保护减少设备间光连接数量的方法流程示意图；4 is a schematic flowchart of a method for reducing the number of optical connections between devices through coordinated protection in Embodiment 2 of the present invention;
图5为本发明实施例三PTN核心层设备与LTE核心网设备之间发生故障的组网拓扑图；FIG. 5 is a network topology diagram of a failure between a PTN core layer device and an LTE core network device according to Embodiment 3 of the present invention;
图6为本发明实施例三通过协调保护减少设备间光连接数量的方法流程示意图；6 is a schematic flowchart of a method for reducing the number of optical connections between devices through coordinated protection according to Embodiment 3 of the present invention;
图7为本发明实施例四通过协调保护减少设备间光连接数量的方法流程示意图；7 is a schematic flowchart of a method for reducing the number of optical connections between devices through coordinated protection according to Embodiment 4 of the present invention;
图8为本发明实施例通过协调保护减少设备间光连接数量的装置的组成结构示意图；FIG. 8 is a schematic diagram of the composition and structure of a device for reducing the number of optical connections between devices through coordinated protection according to an embodiment of the present invention;
图9为本发明另一实施例通过协调保护减少设备间光连接数量的装置的组成结构示意图。FIG. 9 is a schematic structural diagram of an apparatus for reducing the number of optical connections between devices through coordinated protection according to another embodiment of the present invention.
具体实施方式Detailed ways
在本发明实施例中，PTN核心层设备检测与远端PE节点之间的故障；当检测到所述PTN核心层设备与远端PE节点之间的链路出现故障时，将与故障相关的IP网段地址通知LTE核心网设备；LTE核心网设备在接收到所述故障IP网段后，启动IP FRR保护将所述故障IP网段的路由切换到备用路由；或者，PTN核心层设备检测与LTE核心网设备之间的故障；当检测到所述PTN核心层设备与LTE核心网设备的链路出现故障时，将与故障相关的IP网段地址通知远端PE节点；远端PE节点在接收到所述故障IP网段后，启动VPN FRR保护将所述故障IP网段的路由切换到备用路由。In the embodiment of the present invention, the PTN core layer device detects a fault with the remote PE node; when a fault occurs on the link between the PTN core layer device and the remote PE node, the fault-related The IP network segment address notifies the LTE core network equipment; after receiving the faulty IP network segment, the LTE core network device starts IP FRR protection to switch the route of the faulty IP network segment to an alternate route; or, the PTN core layer device detects Fault between the LTE core network equipment; when detecting that the link between the PTN core layer equipment and the LTE core network equipment fails, notify the remote PE node of the IP network segment address related to the fault; the remote PE node After receiving the faulty IP network segment, start VPN FRR protection to switch the route of the faulty IP network segment to an alternate route.
这里，所述将与故障相关的IP网段地址通知LTE核心网设备/远端PE节点为：将相关的故障IP网段地址，通过PTN核心层设备与LTE核心网设备/远端PE节点之间的BFD协议扩展字段，通知到LTE核心网设备/远端PE节点，其中，所述BFD协议扩展字段为：在原有的BFD协议中增加用于描述发生故障的IP网段的可选字段；所述通知到LTE核心网设备/远端PE节点为：将变化后的BFD协议报文发往LTE核心网设备/远端PE节点。对应的，所述LTE核心网设备/远端PE节点接收到所述故障IP网段为：LTE核心网设备/远端PE节点从接收到的BFD报文中解析出故障IP网段地址。Here, the IP network segment address related to the failure is notified to the LTE core network device/remote PE node as: the relevant fault IP network segment address is passed between the PTN core layer device and the LTE core network device/remote PE node BFD agreement extension field between, notify to LTE core network equipment/remote PE node, wherein, described BFD agreement extension field is: increase the optional field that is used to describe the IP network segment that fails in original BFD agreement; The notification to the LTE core network device/remote PE node is: sending the changed BFD protocol message to the LTE core network device/remote PE node. Correspondingly, the LTE core network device/remote PE node receives the faulty IP network segment as follows: the LTE core network device/remote PE node resolves the faulty IP network segment address from the received BFD message.
BFD协议的扩展方法，如表1所示，在原有的协议PDU后增加几个可选字段，用于描述发生故障的IP网段。表1中最后一行内容为新增加的可选字段其中：The extension method of the BFD protocol, as shown in Table 1, adds several optional fields after the original protocol PDU to describe the IP network segment where the fault occurs. The last row in Table 1 is a newly added optional field where:
Disabled IP addr Type：表示后续字段为故障IP网段地址内容，该Type的取值不能与现有的Auth Type取值重复；Disabled IP addr Type: Indicates that the follow-up field is the content of the faulty IP network segment address, and the value of this Type cannot be the same as that of the existing Auth Type;
IP addr num：表示后续报文中IP地址网段的个数；IP addr num: Indicates the number of IP address network segments in subsequent packets;
IP addr data：表示具体的故障IP网段值，这里可能包含多个IP网段值。IP addr data: Indicates the specific faulty IP network segment value, which may contain multiple IP network segment values.
表1Table 1
启动IP FRR保护将所述故障IP网段的路由切换到备用路由之后，所述PTN核心层设备继续检测与远端PE节点之间的故障，当检测到所述PTN核心层设备与远端PE节点之间的链路故障消失时，将所述IP网段地址从所述BFD协议扩展字段中删除，并将变化后的BFD协议报文发往LTE核心网设备；对应的，所述LTE核心网设备未接收到故障IP网段地址时，启动IP FRR保护将路由回切。After starting the IP FRR protection and switching the route of the faulty IP network segment to the backup route, the PTN core layer device continues to detect the fault between the remote PE node. When the link failure between nodes disappears, the IP network segment address is deleted from the BFD protocol extension field, and the changed BFD protocol message is sent to the LTE core network device; correspondingly, the LTE core When the network device does not receive the address of the faulty IP network segment, start IP FRR protection to switch the route back.
对应的，启动VPN FRR保护将所述故障IP网段的路由切换到备用路由之后，所述PTN核心层设备继续检测与LTE核心网设备之间的故障，当检测到所述PTN核心层设备与LTE核心网设备的链路故障消失时，将所述IP网段地址从所述BFD协议扩展字段中删除，并将变化后的BFD协议报文发往远端PE节点；对应的，所述远端PE节点未接收到故障IP网段地址时，启动VPN FRR保护将路由回切。Correspondingly, after starting the VPN FRR protection and switching the route of the faulty IP network segment to the standby route, the PTN core layer device continues to detect a fault with the LTE core network device, and when it is detected that the PTN core layer device is connected to the LTE core network device When the link failure of the LTE core network equipment disappears, the IP network segment address is deleted from the BFD protocol extension field, and the changed BFD protocol message is sent to the remote PE node; correspondingly, the remote When the end PE node does not receive the address of the faulty IP network segment, start VPN FRR protection to switch the route back.
所述LTE核心网设备可以为但不限于sGW/MME。The LTE core network equipment may be but not limited to sGW/MME.
下面结合附图及具体实施例，对本发明实施例技术方案的实施作进一步的详细描述。图2为本发明实施例一PTN核心层设备与远端PE节点之间发生故障的组网拓扑图，本实施例中，LTE核心网设备以sGW为例，PTN核心层设备为图中的PE1和PE2，远端PE节点为PE3-PE8。当发生图2所述故障时，由于现有技术中，PE1与PE2之间存在光纤连接，sGW发送到PE1的下行业务会通过PE1与PE2之间的光纤连接，发送到PE2，经由PE2转发到远端PE节点，例如当所述下行业务为发往eNB-1的业务时，现有技术中的业务路径为sGW-PE1-PE2-PE4-eNB-1。本发明实施例通过一种故障通知机制，使得LTE核心网设备能够感知PTN核心层设备与远端PE节点之间的故障，从而在LTE核心网设备内实现路由倒换，例如当所述下行业务为发往eNB-1的业务时，本发明实施例中的业务路径为sGW-PE2-PE4-eNB-1如此，下行业务可以不再通过PE1与PE2之间的光连接，从而减少设备间光连接数量。The implementation of the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Figure 2 is a network topology diagram of a failure between a PTN core layer device and a remote PE node according to Embodiment 1 of the present invention. In this embodiment, the LTE core network device takes sGW as an example, and the PTN core layer device is PE1 in the figure and PE2, and the remote PE nodes are PE3-PE8. When the fault described in Figure 2 occurs, due to the existing technology, there is an optical fiber connection between PE1 and PE2, the downlink traffic sent by the sGW to PE1 will be sent to PE2 through the optical fiber connection between PE1 and PE2, and forwarded to PE2 via PE2. For the remote PE node, for example, when the downlink service is sent to eNB-1, the service path in the prior art is sGW-PE1-PE2-PE4-eNB-1. The embodiment of the present invention uses a fault notification mechanism to enable the LTE core network equipment to perceive the fault between the PTN core layer equipment and the remote PE node, thereby implementing route switching in the LTE core network equipment, for example, when the downlink service is When the service is sent to eNB-1, the service path in the embodiment of the present invention is sGW-PE2-PE4-eNB-1, so that the downlink service can no longer pass through the optical connection between PE1 and PE2, thereby reducing the optical connection between devices quantity.
图3为本发明实施例一通过协调保护减少设备间光连接数量的方法流程示意图，如图3所示，本发明实施例一通过协调保护减少设备间光连接数量的方法包括以下步骤：FIG. 3 is a schematic flow chart of a method for reducing the number of optical connections between devices through coordinated protection according to Embodiment 1 of the present invention. As shown in FIG. 3 , the method for reducing the number of optical connections between devices through coordinated protection in Embodiment 1 of the present invention includes the following steps:
步骤301：PTN核心层设备检测与远端PE节点之间的故障；Step 301: PTN core layer equipment detects a fault between the remote PE node;
所述检测与远端PE节点之间的故障可以采用BFD或多协议标签交换－传送架构（MPLS-TP，Multi-Protocol Label Switching）操作管理维护（OAM，Operation Administration and Maintenance）等方法实现。The detection of the fault between the remote PE node can be realized by BFD or Multi-Protocol Label Switching (MPLS-TP, Multi-Protocol Label Switching) operation management and maintenance (OAM, Operation Administration and Maintenance) and other methods.
步骤302：当检测到所述PTN核心层设备与远端PE节点之间的链路出现故障时，将与故障相关的IP网段地址通知LTE核心网设备；Step 302: When it is detected that the link between the PTN core layer equipment and the remote PE node fails, notify the LTE core network equipment of the IP network segment address related to the failure;
所述将与故障相关的IP网段地址通知LTE核心网设备为：将相关的故障IP网段地址，通过PTN核心层设备与LTE核心网设备之间的BFD协议扩展字段，通知到LTE核心网设备，其中，所述BFD协议扩展字段为：在原有BFD协议中增加用于描述发生故障的IP网段的可选字段；所述通知到LTE核心网设备为：将变化后的BFD协议报文发往LTE核心网设备。Said notifying the LTE core network equipment of the IP network segment address relevant to the failure is: the relevant failure IP network segment address is notified to the LTE core network by the BFD protocol extension field between the PTN core layer equipment and the LTE core network equipment device, wherein the BFD protocol extension field is: adding an optional field used to describe the IP network segment where the failure occurred in the original BFD protocol; the notification to the LTE core network device is: the changed BFD protocol message Send to LTE core network equipment.
BFD协议的扩展方法，如表1所示，在原有的协议PDU后增加几个可选字段，用于描述发生故障的IP网段。The extension method of the BFD protocol, as shown in Table 1, adds several optional fields after the original protocol PDU to describe the IP network segment where the fault occurs.
步骤303：LTE核心网设备接收到所述故障IP网段后，启动IP FRR保护将所述故障IP网段的路由切换到备用路由；Step 303: After the LTE core network equipment receives the faulty IP network segment, start IP FRR protection to switch the route of the faulty IP network segment to an alternate route;
具体的，LTE核心网设备从接收到的BFD报文中解析出故障IP网段地址，启动IP FRR保护将所述故障IP网段的路由切换到备用路由。Specifically, the LTE core network equipment resolves the address of the faulty IP network segment from the received BFD message, and starts IP FRR protection to switch the route of the faulty IP network segment to an alternate route.
进一步，本发明还包括：PTN核心层设备检测与远端PE节点之间的故障是否消失。当检测到所述PTN核心层设备与远端PE节点之间的链路故障消失时，将所述IP网段地址从所述BFD协议扩展字段中删除，并将变化后的BFD协议报文发往LTE核心网设备；对应的，所述LTE核心网设备未接收到故障IP网段地址时，启动IP FRR保护将路由回切。Further, the present invention also includes: whether the fault between the PTN core layer device and the remote PE node disappears. When it is detected that the link failure between the PTN core layer device and the remote PE node disappears, the IP network segment address is deleted from the BFD protocol extension field, and the changed BFD protocol message is sent to To the LTE core network equipment; Correspondingly, when the LTE core network equipment does not receive the faulty IP network segment address, start IP FRR protection and switch back the route.
图4为本发明实施例二通过协调保护减少设备间光连接数量的方法流程示意图；如图4所示，本发明实施例二通过协调保护减少设备间光连接数量的方法包括以下步骤：Fig. 4 is a schematic flowchart of a method for reducing the number of optical connections between devices through coordinated protection in Embodiment 2 of the present invention; as shown in Fig. 4 , the method for reducing the number of optical connections between devices through coordinated protection in Embodiment 2 of the present invention includes the following steps:
步骤401：PTN核心层设备判断与远端PE节点之间的故障是否发生变化；当故障产生时，执行步骤402；当故障消失时，执行步骤404；Step 401: The PTN core layer device judges whether the fault with the remote PE node has changed; when the fault occurs, execute step 402; when the fault disappears, execute step 404;
所述故障产生为：原PTN核心层设备与远端PE节点之间不存在故障，经检测出现故障；所述故障消失为：原PTN核心层设备与远端PE节点之间存在故障，经检测故障消失。Described fault generation is: there is no fault between the original PTN core layer equipment and the far-end PE node, and a fault occurs after detection; The fault disappears.
步骤402：当检测到所述PTN核心层设备与远端PE节点之间的链路出现故障时，将与故障相关的IP网段地址通知长期演进LTE核心网设备；Step 402: When it is detected that the link between the PTN core layer device and the remote PE node fails, notify the Long Term Evolution LTE core network device of the IP network segment address related to the fault;
所述将与故障相关的IP网段地址通知LTE核心网设备为：将相关的故障IP网段地址，通过PTN核心层设备与LTE核心网设备之间的BFD协议扩展字段，通知到LTE核心网设备，其中，所述BFD协议扩展字段为：在原有BFD协议中增加用于描述发生故障的IP网段的可选字段；所述通知到LTE核心网设备为：将变化后的BFD协议报文发往LTE核心网设备。Said notifying the LTE core network equipment of the IP network segment address relevant to the failure is: the relevant failure IP network segment address is notified to the LTE core network by the BFD protocol extension field between the PTN core layer equipment and the LTE core network equipment device, wherein the BFD protocol extension field is: adding an optional field used to describe the IP network segment where the failure occurred in the original BFD protocol; the notification to the LTE core network device is: the changed BFD protocol message Send to LTE core network equipment.
BFD协议的扩展方法，如表1所示，在原有的协议PDU后增加几个可选字段，用于描述发生故障的IP网段。The extension method of the BFD protocol, as shown in Table 1, adds several optional fields after the original protocol PDU to describe the IP network segment where the fault occurs.
步骤403：LTE核心网设备接收到所述故障IP网段后，启动IP FRR保护将所述故障IP网段的路由切换到备用路由；本流程结束。Step 403: After receiving the faulty IP network segment, the LTE core network device starts IP FRR protection to switch the route of the faulty IP network segment to a backup route; the process ends.
具体的，LTE核心网设备从接收到的BFD报文中解析出故障IP网段地址，启动IP FRR保护将所述故障IP网段的路由切换到备用路由。Specifically, the LTE core network equipment resolves the address of the faulty IP network segment from the received BFD message, and starts IP FRR protection to switch the route of the faulty IP network segment to an alternate route.
步骤404：当检测到所述PTN核心层设备与远端PE节点之间的链路中的故障消失时，将所述故障消失相关信息通知长期演进LTE核心网设备；Step 404: When detecting that the fault in the link between the PTN core layer device and the remote PE node disappears, notify the Long Term Evolution LTE core network device of the fault disappearance related information;
所述将所述故障消失相关信息通知长期演进LTE核心网设备为：将所述IP网段地址从所述BFD协议扩展字段中删除，并将变化后的BFD协议报文发往LTE核心网设备。Said notifying the Long Term Evolution LTE core network equipment of the information about the disappearance of the fault is: deleting the IP network segment address from the BFD protocol extension field, and sending the changed BFD protocol message to the LTE core network equipment .
步骤405：所述LTE核心网设备未接收到故障IP网段地址时，启动IP FRR保护将路由回切。Step 405: When the LTE core network device does not receive the faulty IP network segment address, start IP FRR protection to switch the route back.
具体的，LTE核心网设备从接收到的BFD报文中未解析出故障IP网段地址，启动IP FRR保护将所述故障消失的IP网段的路由回切。Specifically, the LTE core network equipment does not resolve the address of the faulty IP network segment from the received BFD message, and starts IP FRR protection to switch back the route of the IP network segment where the fault has disappeared.
图5为本发明实施例三PTN核心层设备与LTE核心网设备间的故障的组网拓扑图，本实施例中，LTE核心网设备以sGW为例，PTN核心层设备为图中的PE1和PE2，远端PE节点为PE3-PE8。当发生图5所述故障时，由于现有技术中，PE1与PE2之间存在光纤连接，当PE3将上行业务发送到PE1后，PE1会通过PE1与PE2之间的光纤连接，转发到PE2，经由PE2转发到LTE核心网设备，例如当所述上行业务为eNB-1发起的业务时，现有技术中的业务路径为eNB-1-PE3-PE1-PE2-sGW。本发明实施例通过一种故障通知机制，使得远端PE节点能够感知PTN核心层设备与LTE核心网设备之间的故障，从而在远端PE节点内实现路由倒换，例如当所述上行业务为eNB-1发起的业务时，本发明实施例中的业务路径为eNB-1-PE4-PE2-sGW。如此，上行业务可以不再通过PE1与PE2之间的光连接，从而减少设备间光连接数量。Figure 5 is a network topology diagram of a failure between PTN core layer equipment and LTE core network equipment in Embodiment 3 of the present invention. In this embodiment, the LTE core network equipment takes sGW as an example, and the PTN core layer equipment is PE1 and PE2, the remote PE nodes are PE3-PE8. When the fault described in Figure 5 occurs, since there is an optical fiber connection between PE1 and PE2 in the prior art, when PE3 sends the uplink traffic to PE1, PE1 will forward it to PE2 through the optical fiber connection between PE1 and PE2, It is forwarded to the LTE core network equipment via PE2. For example, when the uplink service is a service initiated by eNB-1, the service path in the prior art is eNB-1-PE3-PE1-PE2-sGW. The embodiment of the present invention uses a fault notification mechanism to enable the remote PE node to perceive the fault between the PTN core layer equipment and the LTE core network equipment, so as to realize route switching in the remote PE node, for example, when the uplink service is For the service initiated by eNB-1, the service path in the embodiment of the present invention is eNB-1-PE4-PE2-sGW. In this way, uplink services may no longer pass through the optical connection between PE1 and PE2, thereby reducing the number of optical connections between devices.
图6为本发明实施例三通过协调保护减少设备间光连接数量的方法流程示意图，如图6所示，本发明实施例三通过协调保护减少设备间光连接数量的方法包括以下步骤：Fig. 6 is a schematic flowchart of a method for reducing the number of optical connections between devices through coordinated protection in Embodiment 3 of the present invention. As shown in Fig. 6 , the method for reducing the number of optical connections between devices in Embodiment 3 of the present invention through coordinated protection includes the following steps:
步骤601：PTN核心层设备检测与LTE核心网设备之间的故障；Step 601: PTN core layer equipment detects faults with LTE core network equipment;
所述检测与远端PE节点之间的故障可以采用BFD或物理接口检测等方法实现。The detection of the fault between the remote PE node can be implemented by using methods such as BFD or physical interface detection.
步骤602：当检测到所述PTN核心层设备与LTE核心网设备之间的链路出现故障时，将与故障相关的IP网段地址通知远端PE节点；Step 602: When it is detected that the link between the PTN core layer equipment and the LTE core network equipment fails, notify the remote PE node of the IP network segment address related to the failure;
所述将与故障相关的IP网段地址通知远端PE节点为：将相关的故障IP网段地址，通过PTN核心层设备与远端PE节点之间的BFD协议扩展字段，通知到远端PE节点设备，其中，所述BFD协议扩展字段为：在原有BFD协议中增加用于描述发生故障的IP网段的可选字段；所述通知到远端PE节点为：将变化后的BFD协议报文发往远端PE节点。Said notifying the remote PE node of the IP network segment address related to the fault is: the relevant fault IP network segment address is notified to the remote PE through the BFD protocol extension field between the PTN core layer device and the remote PE node The node device, wherein, the BFD protocol extension field is: adding an optional field used to describe the IP network segment where the failure occurred in the original BFD protocol; the notification to the remote PE node is: reporting the changed BFD protocol The file is sent to the remote PE node.
BFD协议的扩展方法，如表1所示，在原有的协议PDU后增加几个可选字段，用于描述发生故障的IP网段。The extension method of the BFD protocol, as shown in Table 1, adds several optional fields after the original protocol PDU to describe the IP network segment where the fault occurs.
步骤603：远端PE节点接收到所述故障IP网段后，启动VPN FRR保护将所述故障IP网段的路由切换到备用路由；Step 603: After receiving the faulty IP network segment, the remote PE node starts VPN FRR protection to switch the route of the faulty IP network segment to an alternate route;
具体的，远端PE节点从接收到的BFD报文中解析出故障IP网段地址，启动VPN FRR保护将所述故障IP网段的路由切换到备用路由。Specifically, the remote PE node resolves the address of the faulty IP network segment from the received BFD message, and starts VPN FRR protection to switch the route of the faulty IP network segment to a backup route.
进一步，本发明还包括：PTN核心层设备检测与LTE核心网设备之间的故障是否消失。当检测到所述PTN核心层设备与LTE核心网设备之间的链路故障消失时，将所述IP网段地址从所述BFD协议扩展字段中删除，并将变化后的BFD协议报文发往远端PE节点；对应的，所述远端PE节点未接收到故障IP网段地址时，启动IP FRR保护将路由回切。Further, the present invention also includes: detecting whether the fault between the PTN core layer equipment and the LTE core network equipment disappears. When it is detected that the link failure between the PTN core layer equipment and the LTE core network equipment disappears, the IP network segment address is deleted from the BFD protocol extension field, and the changed BFD protocol message is sent to To the remote PE node; Correspondingly, when the remote PE node does not receive the faulty IP network segment address, start IP FRR protection to switch the route back.
图7为本发明实施例四通过协调保护减少设备间光连接数量的方法流程示意图；如图7所示，本发明实施例四通过协调保护减少设备间光连接数量的方法包括以下步骤：FIG. 7 is a schematic flowchart of a method for reducing the number of optical connections between devices through coordinated protection in Embodiment 4 of the present invention; as shown in FIG. 7 , the method for reducing the number of optical connections between devices through coordinated protection in Embodiment 4 of the present invention includes the following steps:
步骤701：PTN核心层设备判断与LTE核心网设备之间的故障是否发生变化；当故障产生时，执行步骤702；当故障消失时，执行步骤704；Step 701: The PTN core layer device judges whether the fault with the LTE core network device has changed; when the fault occurs, execute step 702; when the fault disappears, execute step 704;
所述故障产生为：原PTN核心层设备与LTE核心网设备之间不存在故障，经检测出现故障；所述故障消失为：原PTN核心层设备与LTE核心网设备之间存在故障，经检测故障消失。Described fault generation is: there is no fault between the original PTN core layer equipment and LTE core network equipment, and a fault occurs through detection; The fault disappears as: there is a fault between the original PTN core layer equipment and LTE core network equipment, after detection The fault disappears.
步骤702：当检测到所述PTN核心层设备与LTE核心网设备之间的链路出现故障时，将与故障相关的IP网段地址通知远端PE节点；Step 702: When it is detected that the link between the PTN core layer equipment and the LTE core network equipment fails, notify the remote PE node of the IP network segment address related to the failure;
所述将与故障相关的IP网段地址通知远端PE节点为：将相关的故障IP网段地址，通过PTN核心层设备与远端PE节点之间的BFD协议扩展字段，通知到远端PE节点，具体为：在原有的BFD协议中增加用于描述发生故障的IP网段的可选字段，并将变化后的BFD协议报文发往远端PE节点。Said notifying the remote PE node of the IP network segment address related to the fault is: the relevant fault IP network segment address is notified to the remote PE through the BFD protocol extension field between the PTN core layer device and the remote PE node The node specifically includes: adding an optional field used to describe the IP network segment where the fault occurs in the original BFD protocol, and sending the changed BFD protocol message to the remote PE node.
BFD协议的扩展方法，如表1所示，在原有的协议PDU后增加几个可选字段，用于描述发生故障的IP网段。The extension method of the BFD protocol, as shown in Table 1, adds several optional fields after the original protocol PDU to describe the IP network segment where the fault occurs.
步骤703：远端PE节点接收到所述故障IP网段后，启动VPN FRR保护，将所述故障IP网段的路由切换到备用路由；本流程结束。Step 703: After receiving the faulty IP network segment, the remote PE node starts VPN FRR protection, and switches the route of the faulty IP network segment to a backup route; the process ends.
具体的，远端PE节点从接收到的BFD报文中解析出故障IP网段地址，启动VPN FRR保护将所述故障IP网段的路由切换到备用路由。Specifically, the remote PE node resolves the address of the faulty IP network segment from the received BFD message, and starts VPN FRR protection to switch the route of the faulty IP network segment to a backup route.
步骤704：当检测到所述PTN核心层设备与LTE核心网设备之间的链路中的故障消失时，将所述故障消失相关信息通知远端PE节点；Step 704: When detecting that the fault in the link between the PTN core layer device and the LTE core network device disappears, notify the remote PE node of the fault disappearance related information;
所述将所述故障消失相关信息通知远端PE节点为：将所述IP网段地址从所述BFD协议扩展字段中删除，并将变化后的BFD协议报文发往远端PE节点。Said notifying the remote PE node of the information about the disappearance of the fault is: deleting the IP network segment address from the BFD protocol extension field, and sending the changed BFD protocol message to the remote PE node.
步骤705：所述远端PE节点未接收到故障IP网段地址时，启动VPN FRR保护将路由回切。Step 705: When the remote PE node does not receive the address of the faulty IP network segment, start VPN FRR protection to switch the route back.
具体的，远端PE节点从接收到的BFD报文中未解析出故障IP网段地址，启动VPN FRR保护将所述故障消失的IP网段的路由回切。Specifically, the remote PE node does not resolve the address of the faulty IP network segment from the received BFD message, and starts VPN FRR protection to switch back the route of the IP network segment where the fault has disappeared.
本发明实施例还提供了一种通过协调保护减少设备间光连接数量的装置，如图8所示，所述装置包括：检测单元81、通知单元82、切换单元83，其中，所述检测单元81、通知单元82位于PTN核心层设备，所述切换单元83，位于LTE核心网设备，The embodiment of the present invention also provides a device for reducing the number of optical connections between devices through coordinated protection. As shown in FIG. 81. The notification unit 82 is located in the PTN core layer equipment, and the switching unit 83 is located in the LTE core network equipment,
所述检测单元81，用于检测与远端PE节点之间的故障；The detection unit 81 is configured to detect a fault with a remote PE node;
所述检测单元81检测与远端PE节点之间的故障可以采用BFD或MPLS-TPOAM等方法实现。The detection unit 81 may detect a fault with a remote PE node using methods such as BFD or MPLS-TPOAM.
所述通知单元82，用于当检测到所述PTN核心层设备与远端PE节点之间的链路出现故障时，将与故障相关的IP网段地址通知LTE核心网设备；The notification unit 82 is configured to notify the LTE core network device of the IP network segment address related to the fault when it is detected that the link between the PTN core layer device and the remote PE node fails;
所述通知单元82将与故障相关的IP网段地址通知LTE核心网设备为：将相关的故障IP网段地址，通过PTN核心层设备与LTE核心网设备之间的BFD协议扩展字段，通知到LTE核心网设备，其中，所述BFD协议扩展字段为：在原有BFD协议中增加用于描述发生故障的IP网段的可选字段；所述通知到LTE核心网设备为：将变化后的BFD协议报文发往LTE核心网设备。The notification unit 82 notifies the LTE core network equipment of the IP network segment address relevant to the failure as: the relevant failure IP network segment address is notified to the BFD protocol extension field between the PTN core layer equipment and the LTE core network equipment LTE core network equipment, wherein, the BFD protocol extension field is: increase the optional field used to describe the IP network segment where the failure occurs in the original BFD protocol; the notification to the LTE core network equipment is: the changed BFD The protocol message is sent to the LTE core network device.
BFD协议的扩展方法，如表1所示，在原有的协议PDU后增加几个可选字段，用于描述发生故障的IP网段。The extension method of the BFD protocol, as shown in Table 1, adds several optional fields after the original protocol PDU to describe the IP network segment where the fault occurs.
所述切换单元83，用于在接收到所述故障IP网段后，启动IP FRR保护将所述故障IP网段的路由切换到备用路由。The switching unit 83 is configured to start IP FRR protection to switch the route of the faulty IP network segment to an alternate route after receiving the faulty IP network segment.
具体的，所述切换单元83从接收到的BFD报文中解析出故障IP网段地址，启动IP FRR保护将所述故障IP网段的路由切换到备用路由。Specifically, the switching unit 83 resolves the address of the faulty IP network segment from the received BFD message, and starts IP FRR protection to switch the route of the faulty IP network segment to an alternate route.
进一步的，当所述装置用于所述故障消失后的回切过程时，所述检测单元81，还用于检测所述PTN核心层设备与远端PE节点之间的链路故障是否消失；Further, when the device is used for the switchback process after the fault disappears, the detection unit 81 is also used to detect whether the link fault between the PTN core layer device and the remote PE node disappears;
所述通知单元82，还用于当检测到所述PTN核心层设备与远端PE节点之间的链路故障消失时，将所述IP网段地址从所述BFD协议扩展字段中删除，并将变化后的BFD协议报文发往LTE核心网设备；The notification unit 82 is further configured to delete the IP network segment address from the BFD protocol extension field when detecting that the link failure between the PTN core layer device and the remote PE node disappears, and Send the changed BFD protocol message to the LTE core network equipment;
所述切换单元83，还用于当未接收到故障IP网段地址时，启动IP FRR保护将路由回切。The switching unit 83 is also used to start the IP FRR protection and switch the route back when the faulty IP network segment address is not received.
具体的，所述切换单元83从接收到的BFD报文中未解析出故障IP网段地址，启动IP FRR保护将所述故障消失的IP网段的路由回切。Specifically, the switching unit 83 does not resolve the address of the faulty IP network segment from the received BFD message, and starts IP FRR protection to switch back the route of the IP network segment where the fault disappears.
本发明实施例还提供了一种通过协调保护减少设备间光连接数量的装置，如图9所示，所述装置包括：检测单元91、通知单元92、切换单元93，其中，所述检测单元91、通知单元92位于PTN核心层设备，所述切换单元93，位于远端PE节点，The embodiment of the present invention also provides a device for reducing the number of optical connections between devices through coordinated protection. As shown in FIG. 91. The notification unit 92 is located in the PTN core layer equipment, and the switching unit 93 is located in the remote PE node,
所述检测单元91，用于检测与LTE核心网设备之间的故障；The detection unit 91 is used to detect a fault with the LTE core network equipment;
所述检测与远端PE节点之间的故障可以采用BFD或物理接口检测等方法实现。The detection of the fault between the remote PE node can be implemented by using methods such as BFD or physical interface detection.
所述通知单元92，用于当检测到所述PTN核心层设备与LTE核心网设备的链路出现故障时，将与故障相关的IP网段地址通知远端PE节点；The notification unit 92 is configured to notify the remote PE node of the IP network segment address related to the failure when it is detected that the link between the PTN core layer equipment and the LTE core network equipment fails;
所述将与故障相关的IP网段地址通知远端PE节点为：将相关的故障IP网段地址，通过PTN核心层设备与远端PE节点之间的BFD协议扩展字段，通知到远端PE节点设备，其中，所述BFD协议扩展字段为：在原有BFD协议中增加用于描述发生故障的IP网段的可选字段；所述通知到远端PE节点为：将变化后的BFD协议报文发往远端PE节点。Said notifying the remote PE node of the IP network segment address related to the fault is: the relevant fault IP network segment address is notified to the remote PE through the BFD protocol extension field between the PTN core layer device and the remote PE node The node device, wherein, the BFD protocol extension field is: adding an optional field used to describe the IP network segment where the failure occurred in the original BFD protocol; the notification to the remote PE node is: reporting the changed BFD protocol The file is sent to the remote PE node.
BFD协议的扩展方法，如表1所示，在原有的协议PDU后增加几个可选字段，用于描述发生故障的IP网段。The extension method of the BFD protocol, as shown in Table 1, adds several optional fields after the original protocol PDU to describe the IP network segment where the fault occurs.
所述切换单元93，用于在接收到所述故障IP网段后，启动VPN FRR保护将所述故障IP网段的路由切换到备用路由；The switching unit 93 is configured to start VPN FRR protection to switch the route of the faulty IP network segment to an alternate route after receiving the faulty IP network segment;
具体的，所述切换单元93从接收到的BFD报文中解析出故障IP网段地址，启动VPN FRR保护将所述故障IP网段的路由切换到备用路由。Specifically, the switching unit 93 analyzes the address of the faulty IP network segment from the received BFD message, and starts VPN FRR protection to switch the route of the faulty IP network segment to an alternate route.
进一步的，当所述装置用于所述故障消失后的回切过程时，所述检测单元91还用于检测所述PTN核心层设备与LTE核心网设备的链路故障是否消失；Further, when the device is used for the switchback process after the fault disappears, the detection unit 91 is also used to detect whether the link fault between the PTN core layer equipment and the LTE core network equipment disappears;
所述通知单元92，还用于当检测到所述PTN核心层设备与LTE核心网设备的链路故障消失时，将所述IP网段地址从所述BFD协议扩展字段中删除，并将变化后的BFD协议报文发往远端PE节点；The notification unit 92 is also configured to delete the IP network segment address from the BFD protocol extension field and change The final BFD protocol message is sent to the remote PE node;
所述切换单元93，还用于当未接收到故障IP网段地址时，启动VPN FRR保护将路由回切。The switching unit 93 is also used for starting the VPN FRR protection to switch the route back when the faulty IP network segment address is not received.
具体的，所述切换单元93从接收到的BFD报文中解析出故障IP网段地址，启动VPN FRR保护将所述故障IP网段的路由切换到备用路由。Specifically, the switching unit 93 analyzes the address of the faulty IP network segment from the received BFD message, and starts VPN FRR protection to switch the route of the faulty IP network segment to an alternate route.
图8和图9中所示的通过协调保护减少设备间光连接数量的装置中的各处理单元的实现功能，可参照前述通过协调保护减少设备间光连接数量的方法的相关描述而理解。本领域技术人员应当理解，图8和图9所示的通过协调保护减少设备间光连接数量的装置中各处理单元的功能可通过运行于处理器上的程序而实现，也可通过具体的逻辑电路而实现，比如：可由位于桥接节点的中央处理器（CPU）、微处理器（MPU）、数字信号处理器（DSP）、或现场可编程门阵列（FPGA）实现；所述存储单元也可以由各种存储器、或存储介质实现。The implementation functions of each processing unit in the apparatus for reducing the number of optical connections between devices through coordinated protection shown in FIG. 8 and FIG. 9 can be understood by referring to the related description of the method for reducing the number of optical connections between devices through coordinated protection. Those skilled in the art should understand that the functions of each processing unit in the device for reducing the number of optical connections between devices through coordinated protection shown in Figure 8 and Figure 9 can be realized by programs running on the processor, or by specific logic circuit, for example, it can be implemented by a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP), or a field programmable gate array (FPGA) at a bridge node; the storage unit can also be Realized by various memories or storage media.
在本发明所提供的几个实施例中，应该理解到，所揭露的方法和装置，可以通过其他的方式实现。以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，如：多个单元或组件可以结合，或可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的各组成部分相互之间的通信连接可以是通过一些接口，设备或模块的间接耦合或通信连接，可以是电性的、机械的或其他形式的。In the several embodiments provided by the present invention, it should be understood that the disclosed methods and devices can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or May be integrated into another system, or some features may be ignored, or not implemented. In addition, the communication connection among the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or modules may be in electrical, mechanical or other forms.
上述作为分离部件说明的单元可以是、或也可以不是物理上分开的，作为单元显示的部件可以是、或也可以不是物理模块，即可以位于一个地方，也可以分布到多个网络模块上；可以根据实际的需要选择其中的部分或全部单元来实现本实施例方案的目的。The above-mentioned units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical modules, that is, they may be located in one place or distributed to multiple network modules; Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
另外，在本发明各实施例中的各功能单元可以全部集成在一个处理单元中，也可以是各单元分别单独作为一个单元，也可以两个或两个以上单元集成在一个单元中；上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。In addition, each functional unit in each embodiment of the present invention can be integrated into one processing unit, or each unit can be used as a single unit, or two or more units can be integrated into one unit; the above-mentioned integration The unit can be realized in the form of hardware or in the form of hardware plus software functional unit.
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：移动存储设备、只读存储器（ROM，Read-Only Memory）、磁碟或者光盘等各种可以存储程序代码的介质。Those of ordinary skill in the art can understand that all or part of the steps to realize the above method embodiments can be completed by hardware related to program instructions, and the aforementioned programs can be stored in computer-readable storage media. When the program is executed, the execution includes The steps of the above-mentioned method embodiment; and the aforementioned storage medium includes: various media that can store program codes such as removable storage devices, read-only memory (ROM, Read-Only Memory), magnetic disks or optical disks.
或者，本发明实施例上述集成的单元如果以软件功能模块的形式实现并作为独立的产品销售或使用时，也可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明实施例的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备（可以是个人计算机、服务器、或者网络设备等）执行本发明各个实施例所述方法的全部或部分。而前述的存储介质包括：移动存储设备、ROM、磁碟或者光盘等各种可以存储程序代码的介质。Alternatively, if the above-mentioned integrated units in the embodiments of the present invention are implemented in the form of software function modules and sold or used as independent products, they may also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present invention can be embodied in the form of software products in essence or the part that contributes to the prior art. The computer software products are stored in a storage medium and include several instructions for Make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program codes such as removable storage devices, ROMs, magnetic disks or optical disks.
本发明是实例中记载的通过协调保护减少设备间光连接数量的方法和装置只以VPN为例，但不仅限于此，只要涉及到该通过协调保护减少设备间光连接数量的方法和装置均在本发明的保护范围。The present invention is the method and device for reducing the number of optical connections between devices through coordinated protection described in the examples, and only takes VPN as an example, but it is not limited thereto, as long as it involves the method and device for reducing the number of optical connections between devices through coordinated protection. protection scope of the present invention.
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。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.
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| CN201310645905.XACN104702498B (en) | 2013-12-04 | 2013-12-04 | A kind of method and device reducing equipment room light connects quantity by harmonious protection |
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| CN201310645905.XACN104702498B (en) | 2013-12-04 | 2013-12-04 | A kind of method and device reducing equipment room light connects quantity by harmonious protection |
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| CN201310645905.XAActiveCN104702498B (en) | 2013-12-04 | 2013-12-04 | A kind of method and device reducing equipment room light connects quantity by harmonious protection |
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| CN108668308A (en)* | 2017-03-30 | 2018-10-16 | 中国移动通信集团内蒙古有限公司 | A kind of LTE PTN transmission network and its static routing protection method |
| CN108668308B (en)* | 2017-03-30 | 2021-11-02 | 中国移动通信集团内蒙古有限公司 | An LTE PTN transport network and its static route protection method |
| CN109688015A (en)* | 2019-01-16 | 2019-04-26 | 武汉市九晖通讯技术有限公司 | A kind of biplane network architecture |
| CN110224886A (en)* | 2019-05-31 | 2019-09-10 | 新华三技术有限公司 | Tunnel method for detecting connectivity, device and network edge device |
| CN113225251A (en)* | 2021-05-31 | 2021-08-06 | 上海寰创通信科技股份有限公司 | Method and system for rapidly switching LTE (Long term evolution) main router and LTE main router |
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