CN105162705B - Method, device and system for notifying UNI tunnel state - Google Patents

Abstract

The embodiment of the invention provides a method, a device and a system for notifying a UNI tunnel state. And when the state of the UNI tunnel is changed from the first state to the second state, the light controller sends the information of the changed second state of the UNI tunnel to the IP controller, and the IP controller can update the information of the changed second state of the UNI tunnel in time. The IP controller may acquire the updated state of the UNI tunnel, and when the IP controller calculates the transmission path of the service data stream, the IP controller may acquire the reachability of the VNT link bound to the UNI tunnel, delete the unreachable VNT link, and calculate that the transmission path of the service data stream is available. The complexity of the IP controller for calculating the transmission path of the service data stream is reduced, and the time for calculating the transmission path of the service data stream is shortened.

Description

A method, device and system for notifying UNI tunnel status

technical field

The present invention relates to the field of communication technologies, and in particular to a method, device and system for notifying a user network interface (User Network Interface, UNI) tunnel status.

Background technique

At present, the transmission of transmission service data in the communication field is divided into two parts, one part is the transmission of Internet Protocol (Internet Protocol, IP) layer service data, and the other part is the transmission of optical layer service data. The calculation and transmission control of the service data transmission path by the IP layer and the optical layer are independent of each other. Wherein, the IP SNC (Smart Network Controller) of the IP layer is configured with an IP path computation module (Path Computation Element, PCE), and the IP PCE is used to manage the transmission path of the service data of the IP layer. Wherein, the TSDN (Transport-Software Defined Networking) of the optical layer is configured with an optical PCE for managing the transmission path of the optical layer service data.

At present, in the communication field, the optical layer transmission path, the port connection information between the border router in the IP layer transmission path and the border node device in the optical layer path, is abstracted into a virtual network topology (Virtual Network Topology, VNT) link . In the IP layer, the VNT link can be regarded as a virtual link between two routers that can be established but has not yet been established, that is, the VNT link can form a service data transmission path with the IP layer transmission path.

The binding of the VNT link and the UNI tunnel is manually configured in advance, and the Path Computation Client (PCC) reports the binding information of the VNT link and the UNI tunnel to the IP PCE. When the IP PCE calculates the transmission path of the service data flow, it considers that each VNT link is reachable. However, whether the VNT link is reachable depends not only on whether it is bound to a UNI tunnel, but also on whether the bound UNI tunnel is available. In practical applications, in the optical layer network topology, multiple UNI tunnels share one port resource. When one of the UNI tunnels establishes a connection, other UNI tunnels that share the same port with the UNI tunnel cannot establish connections. Moreover, when an optical node in the optical layer network topology fails, all UNI tunnels connected to the failed optical node are unavailable.

At present, the IP PCE first calculates the transmission path of the first service data flow according to the obtained binding information of the VNT link and the UNI tunnel, and the IP PCE cannot know the first transmission path of the calculated first service data flow transmission path. Whether the first UNI tunnel bound to the VNT link is available. The IP PCE sends a message to the optical PCE to query whether the first UNI tunnel is available, and the optical PCE returns to the IP PCE whether the first UNI tunnel is available. When the first UNI tunnel is unavailable, the IPPCE needs to recalculate and obtain the transmission path of the second service data flow, and send to the optical PCE the second VNT link bound to the second VNT link in the transmission path of the calculated second service data flow. 2. A message indicating whether the UNI tunnel is available. Until the UNI tunnel bound to the VNT link in the service data flow transmission path calculated by the IP PCE is available. The calculation process of the IP PCE using the above method to calculate the transmission path of the service data flow is complicated and time-consuming.

Contents of the invention

Embodiments of the present invention provide a method, device and system for notifying the state of the UNI tunnel, which are used to solve the problem that the transmission path of the calculated service data flow is unavailable due to the inability of the IP controller to know the state of the UNI tunnel.

For this reason, the technical scheme that the present invention solves technical problem is:

The first aspect of the embodiment of the present invention provides a method for requesting the UNI tunnel status of the user network side interface, the method including:

The Internet Protocol IP controller generates a UNI Tunnel Status Request message, the UNI Tunnel Status Request message carries a UNI Tunnel Status Request ID, and the UNI Tunnel Status Request ID is used to indicate that when the status of the UNI Tunnel is changed from the first status to the No. When in the second state, request to send the information of the changed second state of the UNI tunnel;

The IP controller sends the UNI tunnel status request message to the light controller.

In the first possible implementation manner of the first aspect of the embodiment of the present invention,

The UNI tunnel state request message is an open message in the path computation element communication protocol PCEP, and the open message includes an Optional field, and the Optional field carries the UNI tunnel state request identifier.

In combination with the first possible implementation manner of the first aspect of the embodiment of the present invention, in the second possible implementation manner,

The Optional field includes a type Type, a length Length, and a value value, the Type carries a type value, and the type value is used to indicate that the type of the Optional field is to indicate whether to request the changed second state of the UNI tunnel information, the Length indicates the length of the Optional field, and the flags in the Value carry the UNI tunnel status request identifier, indicating that when the status of the UNI tunnel is changed from the first status to the second status , requesting information about the changed second state of the UNI tunnel.

In combination with the first aspect of the embodiments of the present invention to the second possible implementation manner of the first aspect, in the third possible implementation manner, the method further includes:

The IP controller receives the UNI tunnel status notification message sent by the optical controller, the UNI tunnel status notification message carries the UNI tunnel status notification identifier, the UNI tunnel identifier and the status of the UNI tunnel, the The UNI tunnel status notification identifier is used to indicate that the type of the UNI tunnel status notification message is information that notifies the changed second state of the UNI tunnel;

The IP controller parses the UNI tunnel state notification message to obtain information of the second state;

The IP controller uses the information of the second state to update the information of the first state corresponding to the identifier of the UNI tunnel;

The IP controller obtains the reachability of the virtual network topology VNT link according to the updated information of the second state of the UNI tunnel, and the VNT link is bound to the UNI tunnel;

The IP controller calculates the transmission path of the service data flow according to the reachability of the VNT link.

The second aspect of the embodiment of the present invention provides a method for notifying the state of the UNI tunnel of the user network side interface, the method including:

The optical controller receives the UNI tunnel status request message sent by the Internet Protocol IP controller, the UNI tunnel status request message carries a UNI tunnel status request identifier, and the UNI tunnel status request identifier is used to indicate that when the status of the UNI tunnel is determined by the first When a state is changed to a second state, requesting to send information about the changed second state of the UNI tunnel;

When the state of the UNI tunnel is changed from the first state to the second state, the light controller acquires the identifier of the UNI tunnel and the information of the second state;

The optical controller generates the UNI tunnel status notification message, the UNI tunnel status notification message includes: the UNI tunnel status notification identifier, the UNI tunnel identifier and the information of the second state, the UNI tunnel status notification Identifying the information used to indicate that the type of the UNI tunnel state notification message is to notify the changed second state of the UNI tunnel;

The optical controller sends the UNI tunnel status notification message to the IP controller.

In the first possible implementation manner of the second aspect of the embodiment of the present invention,

The UNI tunnel status notification message is a path computation notification PCNtf message, and the PCNtf message includes a notification type NT field, a notification value NV field and an option Optional field, and the NT field carries a first type value. The first type value indicates that the type of the PCNtf message is the information of the second state after the change of the UNI tunnel is notified, and the NV field indicates the information of the second state notified by the PCNtf message, so The Optional field carries the identifier of the UNI tunnel.

With reference to the first possible implementation manner of the second aspect of the embodiment of the present invention, in the second possible implementation manner,

The Optional field includes a type Type, a length Length, and a value value, the Type carries a second type value, and the second type value indicates that the type of the Optional field is an identifier that characterizes the UNI tunnel, and the Length indicates The length of the Optional field, the value indicates the identifier of the UNI tunnel, and the value includes the source address IPv4 Tunnel Sender Address of the UNI tunnel, the label switching path LSP ID, the tunnel TunnelID, the extended tunnel Extended Tunnel ID and the destination Address IPv4 Tunnel Endpoint Address.

In combination with the second aspect to the second possible implementation manner of the second aspect of the embodiments of the present invention, in a third possible implementation manner, the acquisition of the identifier of the UNI tunnel and information about the second state by the light controller includes:

The optical controller receives connection change information between the first optical network device and the second optical network device sent by the first optical network device;

The optical controller obtains the identifier of the UNI tunnel established between the first optical network device and the second optical network device according to the connection change information, and the UNI tunnel changes from the first state to the Information about the second state after the second state.

The third aspect of the embodiment of the present invention provides an Internet Protocol IP controller that requests the UNI tunnel status of the user network side interface, and the IP controller includes:

A generating unit, configured to generate a UNI tunnel status request message, the UNI tunnel status request message carrying a UNI tunnel status request identifier, and the UNI tunnel status request identifier is used to indicate that when the status of the UNI tunnel changes from the first status to the second status state, requesting to send information about the changed second state of the UNI tunnel;

a sending unit, configured to send the UNI tunnel status request message generated by the generating unit to the light controller.

In the first possible implementation manner of the third aspect of the embodiments of the present invention,

The UNI tunnel state request message is an open message in the path computation element communication protocol PCEP, and the open message includes an Optional field, and the Optional field carries the UNI tunnel state request identifier.

In combination with the first possible implementation manner of the third aspect of the embodiment of the present invention, in the second possible implementation manner,

The Optional field includes a type Type, a length Length, and a value value, the Type carries a type value, and the type value is used to indicate that the type of the Optional field is to indicate whether to request the changed second state of the UNI tunnel information, the Length indicates the length of the Optional field, and the flags in the Value carry the UNI tunnel status request identifier, indicating that when the status of the UNI tunnel is changed from the first status to the second status , requesting information about the changed second state of the UNI tunnel.

In combination with the third aspect to the second possible implementation manner of the third aspect of the embodiments of the present invention, in the third possible implementation manner, the IP controller further includes:

a receiving unit, configured to receive a UNI tunnel status notification message sent by the optical controller, the UNI tunnel status notification message carrying a UNI tunnel status notification identifier, an identifier of the UNI tunnel, and a status of the UNI tunnel, the The UNI tunnel status notification identifier is used to indicate that the type of the UNI tunnel status notification message is information that notifies the changed second state of the UNI tunnel;

A parsing unit, configured to parse the UNI tunnel state notification message received by the receiving unit to obtain information about the second state;

An updating unit, configured to use the information of the second state to update the first state information corresponding to the identifier of the UNI tunnel;

An acquisition unit, configured to acquire the reachability of a virtual network topology VNT link according to the information of the updated second state of the UNI tunnel, and the VNT link is bound to the UNI tunnel;

A path calculation unit, configured to calculate the transmission path of the service data flow according to the reachability of the VNT link.

The fourth aspect of the embodiments of the present invention provides an optical controller that notifies the user of the UNI tunnel status of the network side interface, and the optical controller includes:

The receiving unit is used to receive the UNI tunnel status request message sent by the Internet Protocol IP controller, the UNI tunnel status request message carries the UNI tunnel status request identifier, and the UNI tunnel status request identifier is used to indicate the status of the UNI tunnel When changing from the first state to the second state, requesting to send information about the changed second state of the UNI tunnel;

An acquisition unit, configured to acquire the identifier of the UNI tunnel and the information of the second state when the state of the UNI tunnel is changed from the first state to the second state;

A generating unit, configured to generate the UNI tunnel status notification message, the UNI tunnel status notification message including: a UNI tunnel status notification identifier, the UNI tunnel identifier and information of the second state, the UNI tunnel status notification Identifying the information used to indicate that the type of the UNI tunnel state notification message is to notify the changed second state of the UNI tunnel;

A sending unit, configured to send the UNI tunnel status notification message to the IP controller.

In the first possible implementation manner of the fourth aspect of the embodiment of the present invention,

The UNI tunnel state notification information is a path computation notification PCNtf message, and the PCNtf message includes a notification type NT field, a notification value NV field and an optional field, and the NT field carries a first type value. The first type value indicates that the type of the PCNtf message is the information of the second state after the change of the UNI tunnel is notified, and the NV field indicates the information of the second state notified by the PCNtf message, so The Optional field carries the identifier of the UNI tunnel.

In combination with the first possible implementation manner of the fourth aspect of the embodiment of the present invention, in the second possible implementation manner of the fourth aspect,

The Optional field includes a type Type, a length Length, and a value value, the Type carries a second type value, and the second type value indicates that the type of the Optional field is an identifier that characterizes the UNI tunnel, and the Length indicates The length of the Optional field, the value indicates the identifier of the UNI tunnel, and the value includes the source address IPv4 Tunnel Sender Address of the UNI tunnel, the label switching path LSP ID, the tunnel TunnelID, the extended tunnel Extended Tunnel ID and the destination Address IPv4 Tunnel Endpoint Address.

In combination with the fourth aspect of the present invention to the second possible implementation manner of the fourth aspect, in the third possible implementation manner, the acquisition unit includes:

The receiving subunit is configured to receive connection change information between the first optical network device and the second optical network device sent by the first optical network device;

An information obtaining subunit, configured to obtain the identifier of the UNI tunnel established between the first optical network device and the second optical network device according to the connection change information, and the UNI tunnel changes from the first state is the information of the second state after the second state.

The fifth aspect of the embodiment of the present invention provides a system for obtaining the UNI tunnel status of the user network side interface, the system includes:

The third possible implementation manner of the third aspect to the third aspect of the embodiment of the present invention is the Internet Protocol IP controller requesting the UNI tunnel state, and the fourth aspect to the fourth aspect of the embodiment of the present invention is the third possible implementation The light controller that notifies the UNI tunnel status described in the implementation manner.

As can be seen from the above technical solutions, the present invention has the following beneficial effects:

Embodiments of the present invention provide a method, device and system for notifying the status of a UNI tunnel. The IP controller sends a UNI tunnel status request message to the optical controller. The UNI tunnel status request message carries a UNI tunnel status request identifier. The UNI tunnel status request message carries a UNI tunnel status request identifier. The state request flag is used to indicate that when the state of the UNI tunnel changes from the first state to the second state, the IP controller requests the light controller to send information about the changed second state of the UNI tunnel. When the state of the UNI tunnel is changed from the first state to the second state, the optical controller sends the information of the changed second state of the UNI tunnel to the IP controller, and the IP controller can update the UNI in time. Information about the second state of the tunnel after it is changed. The IP controller can know the updated state of the UNI tunnel, and then the IP controller can know the reachability of the VNT link bound to the UNI tunnel when calculating the transmission path of the service data flow, and delete the unreachable The transmission path of the calculated service data flow is available for the VNT link. Reduce the complexity of calculating the transmission path of the service data flow by the IP controller, and shorten the time for calculating the transmission path of the service data flow.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of the connection between a border router in an IP layer path and a border optical network device in an optical layer path;

Fig. 2 is the flow chart of the method for requesting UNI tunnel status provided by the embodiment of the present invention;

Fig. 3 is a schematic diagram of the format of the Open message provided by the embodiment of the present invention;

FIG. 4 is a schematic diagram of the format of the Optional field in the Open message provided by the embodiment of the present invention;

5 is a flow chart of a method for announcing the status of a UNI tunnel provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of the format of the PCNtf message provided by the embodiment of the present invention;

Fig. 7 is a schematic diagram of the format of the Optional field in the PCNtf message provided by the embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an IP controller requesting a UNI tunnel state provided by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an optical controller for announcing the UNI tunnel status provided by an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a system for obtaining a UNI tunnel state provided by an embodiment of the present invention;

11 is a schematic diagram of the hardware structure of the IP controller requesting the state of the UNI tunnel provided by the embodiment of the present invention;

12 is a schematic diagram of the hardware structure of the light controller for notifying the UNI tunnel status provided by the embodiment of the present invention;

FIG. 13 is a schematic diagram of a hardware structure of a system for obtaining a UNI tunnel status provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In order to provide an implementation scheme for the IP controller to obtain information about the changed second state of the UNI tunnel when the state of the UNI tunnel changes from the first state to the second state, an embodiment of the present invention provides a notification The method, device and system of the UNI tunnel state will be described in detail below in conjunction with the accompanying drawings of the embodiments of the present invention.

FIG. 1 is a schematic diagram of connection between a border router in an IP layer path and a border optical network device in an optical layer path. The IP PCE in the IP SNC maintains the routers in the IP layer path, and the links between the border routers and the border optical network devices in the optical layer path. The optical PCE in the TSDN maintains the optical network equipment in the optical layer path, and the link between the boundary optical network equipment and the border router in the IP layer path. After the VNT link is bound to the UNI tunnel, the IP PCE can obtain the binding information of the VNT link and the UNI tunnel, that is, it considers that the VNT link is reachable. However, IP PCE cannot know whether the UNI tunnel located in the optical transmission path is reachable. When the UNI tunnel is unreachable, the VNT link bound with the UNI tunnel is also unreachable, and the IP PCE calculated When the transmission path of the data flow passes through the VNT link, the transmission of the service data flow will be interrupted.

In order to ensure that the IP PCE can know the status of the UNI tunnel in the optical transmission path in time, so that the transmission path of the service data stream calculated by the IP PCE can effectively transmit the service data stream, the embodiment of the present invention provides a method for notifying the status of the UNI tunnel, Details are given below.

Fig. 2 is a flow chart of a method for requesting a UNI tunnel state provided by an embodiment of the present invention, the method comprising:

201: The IP controller generates a UNI tunnel status request message, the UNI tunnel status request message carries a UNI tunnel status request identifier, and the UNI tunnel status request identifier is used to indicate that when the status of the UNI tunnel changes from the first status to the second status state, requesting to send information about the changed second state of the UNI tunnel.

202: The IP controller sends the UNI tunnel status request message to the optical controller.

The IP controller generates a UNI tunnel status request message for "subscribing" the status of the UNI tunnel to the light controller. "Subscription" means that when the state of the UNI tunnel changes (for example, the state of the UNI tunnel changes from reachable to unreachable, or the state of the UNI tunnel changes from unreachable to reachable), that is, the UNI tunnel When the state changes from the first state to the second state, the IP controller requests the light controller to send information about the changed second state of the UNI tunnel to the IP controller. That is to say, the IP controller generates a UNI tunnel state request message, which is used to request the light controller to notify the IP controller of the changed second state information of the UNI tunnel in time, so as to implement the IP controller Get the latest status information of the UNI tunnel in real time.

Wherein, the status of the UNI tunnel includes that the UNI tunnel is reachable and the UNI tunnel is not reachable. The UNI tunnel is reachable, indicating that the UNI tunnel is connected and can transmit service data; the UNI tunnel is unreachable, indicating that the UNI tunnel cannot be connected and cannot transmit service data. Generally, in actual application scenarios, multiple UNI tunnels share the same port on the optical network device. When one of the UNI tunnels uses this port to establish a connection, other UNI tunnels cannot establish a connection on this port, that is, other UNI The tunnel is unreachable. In addition, when an optical network device fails, all UNI tunnels connected by ports on the optical network device are unreachable.

In the embodiment of the present invention, description will be made by taking the first state that the UNI tunnel is reachable and the second state that the UNI state is unreachable as an example. The first state is that the UNI tunnel is unreachable, and the second state is that the UNI state is reachable. The implementation method is similar and will not be repeated here.

The IP controller sends the generated UNI tunnel status request message to the light controller. After receiving the UNI tunnel status request message, the optical controller parses the UNI tunnel status request identifier in the UNI tunnel status request message, and then learns that the IP controller "subscribes" the UNI tunnel to the optical controller If the state of the UNI tunnel is changed from the first state to the second state, the information of the changed second state of the UNI tunnel is sent to the IP controller.

During specific implementation, the UNI tunnel state request message generated by the network protocol IP controller is an open message in the Path Computation Element Communication Protocol (Path Computation Element Communication Protocol, PCEP), and the open message includes an option Optional field, the The Optional field carries the UNI tunnel status request identifier.

The UNI tunnel status request message is an Open message defined by the standard RFC5540 in the PCEP protocol, and the format of the Open message is shown in FIG. 3 . Wherein, Ver indicates the version number of the PCEP adopted by the Open message. Flags indicates flag bits of the Open message. Keep alive instructs the IP controller to send the maximum time interval between two adjacent Open messages. Dead timer indicates that after the time specified by the Dead timer is reached, no Open message is received, indicating that the PCEP session sending the Open message ends, and the optical controller transfers the PCEP session between the optical controller and the IP controller The state is set to down. The SID indicates the PCEP session ID to which the Open message belongs.

Wherein, the Optional field carries the UNI tunnel status request identifier. The Optional field includes a type Type, a length Length, and a value value, the Type carries a type value, and the type value is used to indicate that the type of the Optional field is to indicate whether to request the changed second state of the UNI tunnel information, the Length indicates the length of the Optional field, and the Flags in the Value carry the UNI tunnel status request identifier, indicating that when the status of the UNI tunnel is changed from the first status to the second status , requesting information about the changed second state of the UNI tunnel. When setting specifically, the value of Type is 30, and the value of Length is 4.

The format of the Optional field is as shown in Figure 4, Type occupies 2 bytes; Length occupies 2 bytes; Reserved occupies 2 bytes, which is a reserved field; Flags occupies 2 bytes, and N bits in Flags, Information indicating whether to "subscribe" to the changed second state of the UNI tunnel. The Reserved and Flags together form the Value of the Optional field. In actual application scenarios, when the N bit in Flags is set to 1, it means "subscribe" to the reachability of the UNI tunnel, and when the N bit in Flags is set to 0, it means not to "subscribe" to the reachability of the UNI tunnel sex. The type value of Type and the N-bit value in Flags jointly indicate whether to "subscribe" to the information of the changed second state of the UNI tunnel, that is, the reachability of the UNI tunnel.

In the embodiment provided by the present invention, a status request message is defined, and the IP controller generates the UNI tunnel status request message and sends it to the light controller, requesting to "subscribe" to the reachability of the UNI tunnel. In the specific implementation process, the method also includes:

The IP controller receives the UNI tunnel status notification message sent by the optical controller, the UNI tunnel status notification message carries the UNI tunnel status notification identifier, the UNI tunnel identifier and the status of the UNI tunnel, the The UNI tunnel status notification identifier is used to indicate that the type of the UNI tunnel status notification message is information that notifies the changed second state of the UNI tunnel;

The IP controller parses the UNI tunnel state notification message to obtain information of the second state;

The IP controller uses the information of the second state to update the information of the first state corresponding to the identifier of the UNI tunnel;

The IP controller obtains the reachability of the virtual network topology VNT link according to the updated information of the second state of the UNI tunnel, and the VNT link is bound to the UNI tunnel;

The IP controller calculates the transmission path of the service data flow according to the reachability of the VNT link.

The IP controller "subscribes" the state of the UNI tunnel to the light controller, and when the state of the UNI tunnel changes from the first state to the second state, the IP controller receives the light control The UNI tunnel status notification message sent by the device, the UNI tunnel status notification message is used to notify the changed second state information of the UNI tunnel. The UNI tunnel status notification message carries a UNI tunnel status notification identifier, which is used to indicate that the type of the status notification information is information that notifies the second state of the UNI tunnel after it has been changed; the UNI tunnel status notification message also carries The identifier of the UNI tunnel is used to identify the UNI tunnel; the UNI tunnel state notification message also carries second state information, which is used to indicate the changed state of the UNI tunnel.

After the IP controller receives the UNI tunnel state notification message, it parses the UNI tunnel state notification message to obtain information about the changed second state of the UNI tunnel, and uses the information about the second state to update all Describes the information of the original first state of the UNI tunnel. The IP controller obtains the reachability of the VNT link according to the changed second state information of the UNI tunnel, and calculates the transmission path of the service data flow according to the reachability of the VNT link.

It can be seen that, when the state of the UNI tunnel changes from the first state to the second state, the optical controller immediately generates the UNI tunnel state notification message and sends it to the IP controller. The IP controller can learn the information of the changed second state of the UNI tunnel in time. The IP controller can learn the reachability of the VNT link bound to the UNI tunnel according to the changed second state information of the UNI tunnel, and then calculate the service data flow according to the reachability of the VNT link transmission path. When the information of the second state of the UNI tunnel is reachable, the VNT link bound to the UNI tunnel is also reachable, and the IP controller can pass through the VNT link when calculating the transmission path of the service data flow; When the information of the second state of the UNI tunnel is unreachable, the VNT link bound to the UNI tunnel is also unreachable, and the IP controller cannot pass through the VNT link when calculating the transmission path of the service data flow , the calculated transmission path of the service data flow avoids the VNT link to obtain an effective service transmission path. In this way, when the IP controller calculates the transmission path of the service data flow, the problem that the UNI tunnel bound to the VNT link is unreachable and needs repeated calculations to obtain an effective transmission path of the service data flow will not occur. The complexity of calculating the transmission path of the service data flow by the IP controller is reduced, and the time for calculating the transmission path of the service data flow can be shortened.

For example: in a practical application scenario, it is assumed that when the status of the UNI tunnel changes from reachable to unreachable, the optical controller generates the UNI tunnel status notification message, and the UNI tunnel status notification information is used to notify the The status of the UNI tunnel is unreachable. When the IP controller receives the UNI tunnel state notification information, it learns that the state of the UNI tunnel is unreachable, that is, the VNT link bound to the UNI tunnel is also unreachable. Then, the service data flow transmission path calculated and obtained by the IP controller does not pass through the VNT link.

FIG. 5 is a flowchart of a method for announcing the status of a UNI tunnel provided by an embodiment of the present invention. The method includes:

501: The optical controller receives the UNI tunnel status request message sent by the IP controller, the UNI tunnel status request message carries a UNI tunnel status request identifier, and the UNI tunnel status request identifier is used to indicate that when the status of the UNI tunnel is determined by When the first state is changed to the second state, requesting to send information about the changed second state of the UNI tunnel.

The optical controller receives the UNI tunnel state request message sent by the IP controller, parses the UNI tunnel state request message, and learns that the IP controller "subscribes" the changed state of the UNI tunnel to the optical controller. Wherein, the format of the UNI tunnel status request message generated by the IP controller is similar to the description in the method for requesting the status of the UNI tunnel shown in FIG. 2 . Refer to the description in the method shown in FIG. repeat.

502: When the state of the UNI tunnel is changed from the first state to the second state, the light controller obtains an identifier of the UNI tunnel and information of the second state.

When the state of the UNI tunnel is changed from the first state to the second state, since the IP controller "subscribes" to the state of the UNI tunnel, the light controller obtains the first state after the change of the UNI tunnel. Two state information and the identifier of the UNI tunnel. The change of the UNI tunnel from the first state to the second state may be from the reachable state to the unreachable state, or from the unreachable state to the reachable state. In the following, the UNI tunnel is changed from the reachable state to the unreachable state as an example. The change of the UNI tunnel from the unreachable state to the reachable state is similar, and will not be repeated here.

In a specific embodiment, the light controller obtaining the identification of the UNI tunnel and the information of the second state includes:

The optical controller receives connection change information between the first optical network device and the second optical network device sent by the first optical network device;

The optical controller obtains the identifier of the UNI tunnel established between the first optical network device and the second optical network device according to the connection change information, and the UNI tunnel changes from the first state to the Information about the second state after the second state.

When the port on the second optical network device fails, the UNI tunnel connection between the first optical network device and the second optical network device using the port fails; or, when the second optical network device fails, the first optical network device All UNI tunnels between the first optical network device and the second optical network device are faulty. Then the state of the UNI tunnel with connection failure is changed from the reachable state to the unreachable state. At this time, the first network device sends connection change information to the light controller. The light controller receives the connection change information, obtains the identifier of the UNI tunnel and the information of the second state after the UNI tunnel changes from the first state to the second state according to the connection change information.

In practical applications, an Interior Gateway Protocol (InteriorGateway Protocol, IGP) or a PCEP protocol is established between the first optical network device and the optical controller. The first optical network device sends the connection change information to the optical controller by using the IGP protocol or the PCEP protocol.

503: The optical controller generates the UNI tunnel status notification message, the UNI tunnel status notification message includes: a UNI tunnel status notification identifier, an identifier of the UNI tunnel, and information of the second state, and the UNI tunnel The status notification identifier is used to indicate that the type of the UNI tunnel status notification message is information for notifying the changed second state of the UNI tunnel.

504: The optical controller sends the UNI tunnel status notification message to the IP controller.

After the optical controller learns the information of the second state after the UNI tunnel changes and the identifier of the UNI tunnel, it generates the UNI tunnel status notification information and sends it to the IP controller that has "subscribed" to the UNI tunnel status. The UNI tunnel state announcement information is to announce information about the changed second state of the UNI tunnel.

In a specific embodiment, the state notification information is a Path Computation Notification (PCNtf) message, the PCNtf message includes a notification type NT field, a notification value NV field and an option Optional field, and the PCNtf message includes the notification NT Fields carry values of the first type. The first type value indicates that the type of the PCNtf message is the information of the second state after the change of the UNI tunnel is notified, and the NV field indicates the information of the second state notified by the PCNtf message, so The Optional field carries the identifier of the UNI tunnel.

The UNI tunnel state notification message generated by the optical controller using the identifier of the UNI tunnel and the information of the second state is a PCNtf message defined in the RFC standard, and the PCNtf message includes a notification type NT field and a notification value NV field and an Optional field, the NT field indicates the type of the PCNtf message, the NV field indicates the information of the second state notified by the PCNtf message, and the Optional field carries the identifier of the UNI tunnel.

The format of the PCNtf message is shown in FIG. 6 , and Reserved is a reserved field in the PCNtf message. Flag indicates the flag bit of the PCNtf message. The NT field occupies 2 bytes, and indicates that the type of the PCNtf message is information for notifying the changed second state of the UNI tunnel. The NV field occupies 2 bytes and indicates the information of the second state notified by the PCNtf message. A PCNtf message notifies information of a changed second state of the UNI tunnel. In a specific application scenario, the value of the NT field is set to 101, and it is defined that when the value of the NV field is 1, it means that the UNI tunnel is reachable, and when the value of the NV field is 2, it means that the UNI tunnel is unreachable.

Wherein, the Optional field carries the identifier of the UNI tunnel. The format of the Optional field is shown in FIG. 7 . The Optional field includes a type Type, a length Length, and a value value, the Type carries a second type value, and the second type value indicates that the type of the Optional field is an identifier that characterizes the UNI tunnel, and the Length indicates The length of the Optional field, the value indicates the identifier of the UNI tunnel, and the value includes the source address IPv4 Tunnel Sender Address of the UNI tunnel, the label switching path LSP ID, the tunnel TunnelID, the extended tunnel Extended Tunnel ID and the destination Address IPv4 Tunnel Endpoint Address.

In specific application scenarios, the value of Type is set to 18, and the value of Length is set to 16. In the Optional field, IPv4 Tunnel Sender Address, LSP ID, Tunnel ID, Extended Tunnel ID and IPv4Tunnel Endpoint Address together constitute the identifier of the UNI tunnel.

The optical controller sends the generated UNI tunnel state notification message to the IP controller, and the IP controller obtains information about the changed second state of the UNI tunnel according to the UNI tunnel state notification message. The IP controller learns the reachability of the VNT link bound to the UNI tunnel according to the changed second state information of the UNI tunnel, and calculates the VNT link according to the reachability of the VNT link. The transmission path of service flow data. This is similar to the description in the method shown in FIG. 2 , refer to the description in the method shown in FIG. 2 , and details are not repeated here.

As can be seen from the foregoing, the present invention has the following beneficial effects:

The IP controller sends a UNI tunnel state request message to the light controller, and the UNI tunnel state request message carries a UNI tunnel state request flag, and the UNI tunnel state request flag is used to indicate that when the state of the UNI tunnel changes from the first state to In the second state, the IP controller requests the light controller to send information of the changed second state of the UNI tunnel. When the state of the UNI tunnel is changed from the first state to the second state, the optical controller sends the information of the changed second state of the UNI tunnel to the IP controller, and the IP controller can update the UNI in time. Information about the second state of the tunnel after it is changed. The IP controller can know the updated state of the UNI tunnel, and then the IP controller can know the reachability of the VNT link bound to the UNI tunnel when calculating the transmission path of the service data flow, and delete the unreachable The transmission path of the calculated service data flow is available for the VNT link. Reduce the complexity of calculating the transmission path of the service data flow by the IP controller, and shorten the time for calculating the transmission path of the service data flow.

FIG. 8 is a schematic structural diagram of an IP controller 800 requesting a UNI tunnel state provided by an embodiment of the present invention. The IP controller 800 may be the IP controller in the embodiment shown in FIG. 2 or FIG. device 800 includes:

The generating unit 801 is configured to generate a UNI tunnel status request message, the UNI tunnel status request message carries a UNI tunnel status request identifier, and the UNI tunnel status request identifier is used to indicate that when the status of the UNI tunnel changes from the first status When it is in the second state, request to send the information of the changed second state of the UNI tunnel.

The sending unit 802 is configured to send the UNI tunnel status request message generated by the generating unit 801 to the light controller.

Optionally, the UNI tunnel state request message is an open message in the path computation element communication protocol PCEP, and the open message includes an Optional field, and the Optional field carries the UNI tunnel state request identifier.

Wherein, the Optional field includes a type Type, a length Length, and a value value, and the Type carries a type value, and the type value is used to indicate that the type of the Optional field is the changed No. Two-state information, the Length indicates the length of the Optional field, and the flags in the Value carry the UNI tunnel state request identifier, indicating that when the state of the UNI tunnel changes from the first state to the second state, request information about the changed second state of the UNI tunnel.

Optionally, the IP controller also includes:

a receiving unit, configured to receive a UNI tunnel status notification message sent by the optical controller, the UNI tunnel status notification message carrying a UNI tunnel status notification identifier, an identifier of the UNI tunnel, and a status of the UNI tunnel, the The UNI tunnel status notification identifier is used to indicate that the type of the UNI tunnel status notification message is information that notifies the changed second state of the UNI tunnel;

A parsing unit, configured to parse the UNI tunnel state notification message received by the receiving unit to obtain information about the second state;

An updating unit, configured to use the information of the second state to update the first state information corresponding to the identifier of the UNI tunnel;

An acquisition unit, configured to acquire the reachability of a virtual network topology VNT link according to the information of the updated second state of the UNI tunnel, and the VNT link is bound to the UNI tunnel;

A path calculation unit, configured to calculate the transmission path of the service data flow according to the reachability of the VNT link.

The IP controller of requesting the UNI tunnel state shown in Figure 8 is the IP controller corresponding to the method for requesting the UNI tunnel state shown in Figure 2, with reference to the technical description in the method for requesting the UNI tunnel state shown in Figure 2, I won't go into details here.

FIG. 9 is a schematic structural diagram of a light controller 900 for announcing the status of a UNI tunnel provided by an embodiment of the present invention. The light controller 900 may be the light controller in the embodiment shown in FIG. 2 or FIG. 5 , and the light controller 900 includes:

The receiving unit 901 is configured to receive a UNI tunnel status request message sent by an Internet Protocol IP controller, the UNI tunnel status request message carries a UNI tunnel status request identifier, and the UNI tunnel status request identifier is used to indicate when the UNI tunnel When the state is changed from the first state to the second state, it is requested to send the information of the changed second state of the UNI tunnel.

The obtaining unit 902 is configured to obtain the identifier of the UNI tunnel and information of the second state when the state of the UNI tunnel changes from the first state to the second state.

A generating unit 903, configured to generate the UNI tunnel status notification message, the UNI tunnel status notification message including: a UNI tunnel status notification identifier, the UNI tunnel identifier and information of the second state, the status notification identifier It is used to indicate that the type of the UNI tunnel state notification message is information for notifying the changed second state of the UNI tunnel.

The sending unit 904 is configured to send the UNI tunnel status notification message to the IP controller.

Optionally, the UNI tunnel state notification information is a path computation notification PCNtf message, and the PCNtf message includes a notification type NT field, a notification value NV field and an optional field, and the NT field carries a first type value. The first type value indicates that the type of the PCNtf message is the information of the second state after the change of the UNI tunnel is notified, and the NV field indicates the information of the second state notified by the PCNtf message, so The Optional field carries the identifier of the UNI tunnel.

Wherein, the Optional field includes a type Type, a length Length, and a value value, and the Type carries a second type value, and the second type value indicates that the type of the Optional field is an identifier representing the UNI tunnel, and the Length indicates the length of the Optional field, the value indicates the identifier of the UNI tunnel, and the value includes the source address IPv4 Tunnel Sender Address of the UNI tunnel, the label switched path LSP ID, the tunnel TunnelID, and the extended tunnel Extended Tunnel ID And the destination address IPv4 Tunnel Endpoint Address.

Optionally, the acquiring unit 902 includes:

The receiving subunit is configured to receive connection change information between the first optical network device and the second optical network device sent by the first optical network device;

An information obtaining subunit, configured to obtain the identifier of the UNI tunnel established between the first optical network device and the second optical network device according to the connection change information, and the UNI tunnel changes from the first state is the information of the second state after the second state.

The optical controller for announcing the UNI tunnel state shown in FIG. 9 is an IP controller corresponding to the method for announcing the UNI tunnel state shown in FIG. 5 . With reference to the technical description in the method for requesting the UNI tunnel state shown in FIG. 5 , I won't go into details here.

FIG. 10 is a schematic structural diagram of a system 1000 for obtaining the status of a UNI tunnel provided by an embodiment of the present invention. The system 1000 includes:

The IP controller 1001 shown in FIG. 8 requests the status of the UNI tunnel, and the light controller 1002 shown in FIG. 9 notifies the status of the UNI tunnel.

The IP controller 1001 is the IP controller shown in FIG. 8 , referring to the description of the IP controller in FIG. The description of the light controller in FIG. 9 is omitted here.

FIG. 11 is a schematic diagram of a hardware structure of an IP controller 1100 that requests the status of a UNI tunnel provided by an embodiment of the present invention. The IP controller 1100 may be the IP controller in the embodiment shown in FIG. 2 or FIG. 5, and the IP controller 1100 includes:

A memory 1101, a transmitter 1102, and a processor 1103 respectively connected to the memory 1101 and the transmitter 1102.

The memory 1101 is used to store program instructions, and the processor 1103 is used to call the program instructions from the memory 1101 to perform the following operations:

Generate a UNI tunnel status request message, the UNI tunnel status request message carries a UNI tunnel status request identifier, and the UNI tunnel status request identifier is used to indicate that when the status of the UNI tunnel is changed from the first status to the second status, request to send Information about the changed second state of the UNI tunnel;

The sender 1102 is configured to send the UNI tunnel status request message generated by the processor 1103 to the light controller.

Optionally, the UNI tunnel state request message is an open message in the path computation element communication protocol PCEP, and the open message includes an Optional field, and the Optional field carries the UNI tunnel state request identifier.

Wherein, the Optional field includes a type Type, a length Length, and a value value, and the Type carries a type value, and the type value is used to indicate that the type of the Optional field is the changed No. Two-state information, the Length indicates the length of the Optional field, and the flags in the Value carry the UNI tunnel state request identifier, indicating that when the state of the UNI tunnel changes from the first state to the second state, request information about the changed second state of the UNI tunnel.

Optionally, the IP controller also includes:

a receiver, configured to receive a UNI tunnel status notification message sent by the optical controller, the UNI tunnel status notification message carrying a UNI tunnel status notification identifier, an identifier of the UNI tunnel, and a status of the UNI tunnel, the The UNI tunnel status notification identifier is used to indicate that the type of the UNI tunnel status notification message is information that notifies the changed second state of the UNI tunnel;

The processor 1103 is further configured to perform the following operations:

Analyzing the UNI tunnel status notification message received by the receiver to obtain information about the second status;

Utilizing the information of the second state to update the first state information corresponding to the identifier of the UNI tunnel;

Obtaining the reachability of a virtual network topology VNT link according to the information of the updated second state of the UNI tunnel, the VNT link is bound to the UNI tunnel;

Calculate the transmission path of the service data flow according to the reachability of the VNT link.

The IP controller of the state of requesting the UNI tunnel shown in Figure 11 is the IP controller corresponding to the method for the state of requesting the UNI tunnel shown in Figure 2, referring to the method for requesting the state of the UNI tunnel shown in Figure 2 The technical description will not be repeated here.

FIG. 12 is a schematic diagram of the hardware structure of a light controller 1200 for notifying the status of a UNI tunnel provided by an embodiment of the present invention. The light controller 1200 may be the light controller in the embodiment shown in FIG. 2 or FIG. 5 . Device 1200 includes:

A memory 1201, a receiver 1202, a transmitter 1203, and a processor 1204 connected to the memory 1201, the receiver 1202, and the transmitter 1203 respectively.

The receiver 1202 is configured to receive a UNI tunnel status request message sent by an Internet Protocol IP controller, the UNI tunnel status request message carries a UNI tunnel status request identifier, and the UNI tunnel status request identifier is used to indicate when the UNI When the state of the tunnel is changed from the first state to the second state, requesting to send information of the changed second state of the UNI tunnel;

The memory 1201 is used to store program instructions, and the processor 1204 is used to call the program instructions from the memory 1201 to perform the following operations:

When the state of the UNI tunnel is changed from the first state to the second state, obtain the identifier of the UNI tunnel and the information of the second state;

Generating the UNI tunnel status notification message, the UNI tunnel status notification message includes: a UNI tunnel status notification identifier, the UNI tunnel identifier, and information about the second state, the UNI tunnel status notification identifier is used to represent the The type of the UNI tunnel state announcement message is information about the second state after the change of the UNI tunnel;

The sender 1203 is configured to send the UNI tunnel status notification message generated by the processor 1204 to the IP controller.

Optionally, the UNI tunnel state notification information is a path computation notification PCNtf message, and the PCNtf message includes a notification type NT field, a notification value NV field and an optional field, and the NT field carries a first type value. The first type value indicates that the type of the PCNtf message is the information of the second state after the change of the UNI tunnel is notified, and the NV field indicates the information of the second state notified by the PCNtf message, so The Optional field carries the identifier of the UNI tunnel.

Wherein, the Optional field includes a type Type, a length Length, and a value value, and the Type carries a second type value, and the second type value indicates that the type of the Optional field is an identifier representing the UNI tunnel, and the Length indicates the length of the Optional field, the value indicates the identifier of the UNI tunnel, and the value includes the source address IPv4 Tunnel Sender Address of the UNI tunnel, the label switched path LSP ID, the tunnel TunnelID, and the extended tunnel Extended Tunnel ID And the destination address IPv4 Tunnel Endpoint Address.

optional,

The receiver 1202 is further configured to receive connection change information between the first optical network device and the second optical network device sent by the first optical network device;

The processor 1204 is further configured to perform the following operations:

Obtaining the identifier of the UNI tunnel established between the first optical network device and the second optical network device according to the connection change information, and after the UNI tunnel changes from the first state to the second state Information about the second state of .

The optical controller for announcing the state of the UNI tunnel shown in Figure 12 is an IP controller corresponding to the method for announcing the state of the UNI tunnel shown in Figure 5, referring to the method for requesting the state of the UNI tunnel shown in Figure 5 The technical description will not be repeated here.

Figure 13 is a schematic diagram of the hardware structure of the system for obtaining the state of the UNI tunnel provided by the embodiment of the present invention, the system includes:

The IP controller 1301 shown in FIG. 11 requests the status of the UNI tunnel, and the light controller 1302 shown in FIG. 12 notifies the status of the UNI tunnel.

The IP controller 1301 is the IP controller shown in FIG. 8, refer to the description of the IP controller in FIG. The description of the light controller in FIG. 9 is omitted here.

The "first" in the first state mentioned in the embodiment of the present invention is only used for name identification, and does not represent the first in order. The same rule applies to "second" etc.

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 program can be stored in a computer-readable storage medium. When the program is executed, the execution includes: The steps of the above-mentioned method embodiments; and the aforementioned storage medium can be at least one of the following media: various media that can store program codes such as read-only memory (Read-Only Memory, ROM), RAM, magnetic disk or optical disk .

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention and the beneficial effects brought by the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art Those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the present invention Scope of Claims.

Claims (17)

1. A method for requesting user network side interface UNI tunnel state, is characterized in that, described method comprises: The Internet Protocol IP controller generates a UNI Tunnel Status Request message, the UNI Tunnel Status Request message carries a UNI Tunnel Status Request ID, and the UNI Tunnel Status Request ID is used to indicate that when the status of the UNI Tunnel is changed from the first status to the No. When in the second state, request to send information of the changed second state of the UNI tunnel, where the state of the UNI tunnel is used to identify the reachability of the VNT link bound to the UNI tunnel; The IP controller sends the UNI tunnel status request message to the light controller. 2. The method of claim 1, wherein, The UNI tunnel state request message is an open message in the path computation element communication protocol PCEP, and the open message includes an Optional field, and the Optional field carries the UNI tunnel state request identifier. 3. The method of claim 2, wherein, The Optional field includes a type Type, a length Length, and a value value, the Type carries a type value, and the type value is used to indicate that the type of the Optional field is to indicate whether to request the changed second state of the UNI tunnel information, the Length indicates the length of the Optional field, and the flags in the Value carry the UNI tunnel status request identifier, indicating that when the status of the UNI tunnel is changed from the first status to the second status , requesting information about the changed second state of the UNI tunnel. 4. The method according to any one of claims 1-3, wherein the method further comprises: The IP controller receives the UNI tunnel status notification message sent by the optical controller, the UNI tunnel status notification message carries the UNI tunnel status notification identifier, the UNI tunnel identifier and the status of the UNI tunnel, the The UNI tunnel status notification identifier is used to indicate that the type of the UNI tunnel status notification message is information that notifies the changed second state of the UNI tunnel; The IP controller parses the UNI tunnel state notification message to obtain information of the second state; The IP controller uses the information of the second state to update the information of the first state corresponding to the identifier of the UNI tunnel; The IP controller obtains the reachability of the virtual network topology VNT link according to the updated information of the second state of the UNI tunnel, and the VNT link is bound to the UNI tunnel; The IP controller calculates the transmission path of the service data flow according to the reachability of the VNT link. 5. A method for announcing the state of the user network side interface UNI tunnel, is characterized in that, the method comprises: The optical controller receives the UNI tunnel status request message sent by the Internet Protocol IP controller, the UNI tunnel status request message carries a UNI tunnel status request identifier, and the UNI tunnel status request identifier is used to indicate that when the status of the UNI tunnel is determined by the first When a state is changed to a second state, requesting to send the information of the changed second state of the UNI tunnel, the state of the UNI tunnel is used to identify the reachability of the VNT link bound to the UNI tunnel; When the state of the UNI tunnel is changed from the first state to the second state, the light controller acquires the identifier of the UNI tunnel and the information of the second state; The optical controller generates the UNI tunnel status notification message, the UNI tunnel status notification message includes: the UNI tunnel status notification identifier, the UNI tunnel identifier and the information of the second state, the UNI tunnel status notification Identifying the information used to indicate that the type of the UNI tunnel state notification message is to notify the changed second state of the UNI tunnel; The optical controller sends the UNI tunnel status notification message to the IP controller. 6. The method of claim 5, wherein, The UNI tunnel state notification message is a path calculation notification PCNtf message, and the PCNtf message includes a notification type NT field, a notification value NV field and an option Optional field, and the NT field carries a first type value; the first type value Indicating that the type of the PCNtf message is to notify the information of the second state after the change of the UNI tunnel, the NV field indicates the information of the second state notified by the PCNtf message, and the Optional field carries all The identifier of the UNI tunnel mentioned above. 7. The method of claim 6, wherein, The Optional field includes a type Type, a length Length, and a value value, the Type carries a second type value, and the second type value indicates that the type of the Optional field is an identifier that characterizes the UNI tunnel, and the Length indicates The length of the Optional field, the value indicates the identifier of the UNI tunnel, and the value includes the source address IPv4 Tunnel Sender Address of the UNI tunnel, the label switched path LSP ID, the tunnel Tunnel ID, the extended tunnel Extended Tunnel ID and Destination address IPv4 Tunnel Endpoint Address. 8. The method according to any one of claims 5-7, wherein the light controller obtaining the identification of the UNI tunnel and the information of the second state comprises: The optical controller receives connection change information between the first optical network device and the second optical network device sent by the first optical network device; The optical controller obtains the identifier of the UNI tunnel established between the first optical network device and the second optical network device according to the connection change information, and the UNI tunnel changes from the first state to the Information about the second state after the second state. 9. An Internet Protocol IP controller requesting user network side interface UNI tunnel state, characterized in that, said IP controller comprises: A generating unit, configured to generate a UNI tunnel status request message, the UNI tunnel status request message carrying a UNI tunnel status request identifier, and the UNI tunnel status request identifier is used to indicate that when the status of the UNI tunnel changes from the first status to the second status state, requesting to send information about the changed second state of the UNI tunnel, where the state of the UNI tunnel is used to identify the reachability of the VNT link bound to the UNI tunnel; a sending unit, configured to send the UNI tunnel status request message generated by the generating unit to the light controller. 10. The IP controller according to claim 9, characterized in that, The UNI tunnel state request message is an open message in the path computation element communication protocol PCEP, and the open message includes an Optional field, and the Optional field carries the UNI tunnel state request identifier. 11. The IP controller of claim 10, wherein The Optional field includes a type Type, a length Length, and a value value, the Type carries a type value, and the type value is used to indicate that the type of the Optional field is to indicate whether to request the changed second state of the UNI tunnel information, the Length indicates the length of the Optional field, and the flags in the Value carry the UNI tunnel status request identifier, indicating that when the status of the UNI tunnel is changed from the first status to the second status , requesting information about the changed second state of the UNI tunnel. 12. The IP controller according to any one of claims 9-11, wherein the IP controller further comprises: a receiving unit, configured to receive a UNI tunnel status notification message sent by the optical controller, the UNI tunnel status notification message carrying a UNI tunnel status notification identifier, an identifier of the UNI tunnel, and a status of the UNI tunnel, the The UNI tunnel status notification identifier is used to indicate that the type of the UNI tunnel status notification message is information that notifies the changed second state of the UNI tunnel; A parsing unit, configured to parse the UNI tunnel state notification message received by the receiving unit to obtain information about the second state; An updating unit, configured to use the information of the second state to update the first state information corresponding to the identifier of the UNI tunnel; An acquisition unit, configured to acquire the reachability of a virtual network topology VNT link according to the information of the updated second state of the UNI tunnel, and the VNT link is bound to the UNI tunnel; A path calculation unit, configured to calculate the transmission path of the service data flow according to the reachability of the VNT link. 13. An optical controller for announcing the user network side interface UNI tunnel state, characterized in that, the optical controller includes: The receiving unit is used to receive the UNI tunnel status request message sent by the Internet Protocol IP controller, the UNI tunnel status request message carries the UNI tunnel status request identifier, and the UNI tunnel status request identifier is used to indicate the status of the UNI tunnel When changing from the first state to the second state, request to send the information of the changed second state of the UNI tunnel, and the state of the UNI tunnel is used to identify the reachability of the VNT link bound to the UNI tunnel sex; An acquisition unit, configured to acquire the identifier of the UNI tunnel and the information of the second state when the state of the UNI tunnel is changed from the first state to the second state; A generating unit, configured to generate the UNI tunnel status notification message, the UNI tunnel status notification message including: a UNI tunnel status notification identifier, the UNI tunnel identifier and information of the second state, the UNI tunnel status notification Identifying the information used to indicate that the type of the UNI tunnel state notification message is to notify the changed second state of the UNI tunnel; A sending unit, configured to send the UNI tunnel status notification message to the IP controller. 14. The light controller of claim 13, wherein, The UNI tunnel state notification information is a path calculation notification PCNtf message, and the PCNtf message includes a notification type NT field, a notification value NV field and an option Optional field, and the NT field carries a first type value; the first type value Indicating that the type of the PCNtf message is to notify the information of the second state after the change of the UNI tunnel, the NV field indicates the information of the second state notified by the PCNtf message, and the Optional field carries all The identifier of the UNI tunnel mentioned above. 15. The light controller of claim 14 wherein, The Optional field includes a type Type, a length Length, and a value value, the Type carries a second type value, and the second type value indicates that the type of the Optional field is an identifier that characterizes the UNI tunnel, and the Length indicates The length of the Optional field, the value indicates the identifier of the UNI tunnel, and the value includes the source address IPv4 Tunnel Sender Address of the UNI tunnel, the label switched path LSP ID, the tunnel Tunnel ID, the extended tunnel Extended Tunnel ID and Destination address IPv4 Tunnel Endpoint Address. 16. The light controller according to any one of claims 13-15, wherein the acquisition unit comprises: The receiving subunit is configured to receive connection change information between the first optical network device and the second optical network device sent by the first optical network device; An information obtaining subunit, configured to obtain the identifier of the UNI tunnel established between the first optical network device and the second optical network device according to the connection change information, and the UNI tunnel changes from the first state is the information of the second state after the second state. 17. A system for obtaining the UNI tunnel state of the user network side interface, characterized in that the system comprises: The Internet Protocol IP controller for requesting the UNI tunnel state according to any one of claims 9-12, and the light controller for notifying the UNI tunnel state according to any one of claims 13-16.