CN112118122B - Method and system for controlling optical transmission network slice - Google Patents
Method and system for controlling optical transmission network slice Download PDFInfo
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- CN112118122B CN112118122B CN201910541763.XA CN201910541763A CN112118122B CN 112118122 B CN112118122 B CN 112118122B CN 201910541763 A CN201910541763 A CN 201910541763A CN 112118122 B CN112118122 B CN 112118122B
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Abstract
The application provides a method and a system for controlling optical transmission network slicing, when a multi-domain control device receives a slicing requirement sent by a client, network resources are divided for a slice corresponding to the slicing requirement based on local resources, and the resources are reserved; notifying the network information of the slice to the single-domain control equipment corresponding to the reserved resources; when the single-domain control equipment receives the network information of the slice sent by the multi-domain control equipment, calculating resources for the slice based on local resources according to the network information of the slice; if the calculation is successful, reserving the calculated resources for the slice, and informing the multi-domain control device that the resource reservation is successful; otherwise, notifying the multi-domain management and control equipment of resource reservation failure; and when receiving the message of successful resource reservation fed back by all the single-domain control devices corresponding to the resource of the slice, the multi-domain control device returns the message of successful slice to the client. The method can safely and efficiently establish and control the optical transmission network slice.
Description
Technical Field
The present invention relates to the field of optical transmission network technologies, and in particular, to a method and a system for controlling a slice in an optical transmission network.
Background
With the advent of the 5G technology, 5G bearer network services are increasingly diversified in application, and SLA requirements for different services are also greatly different, operators want to build multiple virtualized mutually isolated logical networks on the same physical network to meet the differentiated requirements of different services on network capabilities, which requires an intelligent optical network management and control technology, meets the requirements of future optical bearer network slice management and control, improves the network resource utilization rate, and assists in building a flexible and agile future optical bearer network.
With the gradual construction and commercial use of the future adaptive bearer network, the service has the requirements of type diversification and bearer isolation.
Firstly, the existing optical network bears different services through the same physical network, and only distinguishes different service flows through parameters such as QoS (quality of service) and the like, so that the isolation between the service flows is lacked, and the isolation of different user services on the bearing of a bottom layer network cannot be realized; secondly, the existing network management hierarchy is complex, but the network structure and the network management and control architecture adopt a single universal (One-fit-all) design, and only the same management function is provided for different services, and only the same management strategy can be adopted, so that customized function expansion cannot be performed according to the user requirements, and personalized service management is difficult to realize. An optical network is used as a basis of a backbone network of an operator, and in order to meet the requirements of service isolation and differentiation in a future bearer network, a self-adaptive network slicing scheme oriented to the application requirements of the future bearer network needs to be researched urgently.
Disclosure of Invention
In view of this, the present application provides a method and a system for controlling an optical transmission network slice, which can safely and efficiently establish and control the optical transmission network slice.
In order to solve the technical problem, the technical scheme of the application is realized as follows:
in one embodiment, there is provided an optical transport network slice management method, the method comprising:
when receiving a slice requirement sent by a client, multi-domain management and control equipment divides network resources for a slice corresponding to the slice requirement based on local resources and reserves the resources; notifying the network information of the slice to the single-domain control equipment corresponding to the reserved resources; wherein the network information comprises: a network slicing strategy;
when the single-domain control equipment receives the network information of the slice sent by the multi-domain control equipment, calculating resources for the slice based on local resources according to the network information of the slice; if the calculation is successful, reserving the calculated resources for the slice, and informing the multi-domain control device that the resource reservation is successful; otherwise, notifying the multi-domain management and control equipment of resource reservation failure;
and when receiving the message of successful resource reservation fed back by all the single-domain control devices corresponding to the resource of the slice, the multi-domain control device returns the message of successful slice to the client.
In another embodiment, there is provided an optical transmission network slicing management and control system, including: a multi-domain management and control device and a single-domain management and control device;
when receiving a slice requirement sent by a client, the multi-domain management and control equipment divides network resources for a slice corresponding to the slice requirement based on local resources and reserves the resources; notifying the network information of the slice to the single-domain control equipment corresponding to the reserved resources; wherein the network information comprises: a network slicing strategy; when receiving a message of successful resource reservation fed back by all the single-domain control devices corresponding to the resources of the slice, returning the message of successful slice to the client;
the single-domain control equipment calculates resources for the slice based on local resources according to the network information of the slice when receiving the network information of the slice sent by the multi-domain control equipment; if the calculation is successful, reserving the calculated resources for the slice, and informing the multi-domain control device that the resource reservation is successful; otherwise, notifying the multi-domain management and control equipment that the resource reservation fails.
According to the technical scheme, management and control are integrated, sliced network information is transmitted from top to bottom, and a network slicing strategy is carried in the network information to establish slices meeting requirements.
Drawings
The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention:
fig. 1 is a schematic view of a slicing control flow of an optical transmission network in an embodiment of the present application;
FIG. 2 is a diagram of a system for creating slices according to slicing requirements in an embodiment of the present application;
FIG. 3 is a schematic flow chart illustrating slicing recalculation upon a network failure in an embodiment of the present application;
FIG. 4 is a comparison diagram of a general control model and a slice control model;
fig. 5 is a schematic diagram of an optical transmission network slice management and control system in an embodiment of the present application;
fig. 6 is a schematic diagram of a slice network management and control architecture in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the technical solutions of the present invention are described in detail below with reference to the accompanying drawings and examples.
The embodiment of the application provides a method for managing and controlling an optical transmission network slice, which integrates management and control, transmits sliced network information from top to bottom, and carries a network slice strategy in the network information to establish a slice meeting requirements.
The following describes an implementation of a slicing control process of an optical transmission network in an embodiment of the present application in detail with reference to the accompanying drawings.
The embodiment of the application is applied to a management and control system comprising a multi-domain management and control device and a single-domain management and control device; the multi-domain management and control device is used for managing and controlling resource and information transmission in a plurality of domains, and the single-domain management and control device is used for managing and controlling resource and information transmission in a single domain.
Referring to fig. 1, fig. 1 is a schematic view of a slicing control flow of an optical transmission network in an embodiment of the present application. The method comprises the following specific steps:
In the specific implementation of the method, differentiated services can be provided for the transmission network slices, so that when the slice requirements sent by a client are received, the network information of the slices to be established is determined according to the slice requirements;
the sliced network information includes:
a network slicing strategy; carrying out strategy division according to the service type corresponding to the slicing requirement, wherein the network slicing strategy comprises the following steps:
slicing network resource physical isolation (hard-isolation), such as OTN service; the transmission network creates new slicing network resources aiming at different slicing network users, different physically isolated network resources or pipelines are adopted for carrying, and different slicing network resources are physically isolated.
Slicing network resource logical isolation (soft-isolation), such as PTN traffic, etc.; the transmission network adopts logically isolated network resources or slices of a pipeline bearing upper layer network when creating slice network resources aiming at different slice network users, and different slice network resources are logically isolated.
Slice-network resource sharing (resource-shared), such as IP traffic, etc.; the transport network aims at different network users, when the slicing network resources are created, resources which are distributed to other network users but not used can be adopted, and the different slicing network resources can be shared.
And when the multi-domain control equipment divides the network resources for the slice corresponding to the slice requirement based on the local resources, determining which network slice strategy to use according to the slice requirement, namely dividing the network resources for the slice by using the network slice strategy matched with the slice requirement.
Slicing operation strategy; in the network operation process, due to network faults and other reasons, or after network resources are detected, the resources of the slice network can be adjusted or not adjusted, so that operation strategies meeting requirements need to be set for different slices according to slice requirements; the operation strategy of the slicing network comprises the following steps:
sliced network resource adjustable (modified): such as the bandwidth and topology of the slice network, can be adjusted according to actual needs;
slice network resource fixation (fixed); based on the SLA strategy negotiated with the client, the resource allocated to the slice network user cannot be adjusted without the agreement of the client, that is, when the resource required to be allocated to the slice network in the operation strategy needs to be adjusted, the adjustment cannot be directly performed, and the negotiation with the client is required, and whether the adjustment is possible is determined according to the negotiation result.
When the local reserved resources are successful, slice identifiers can be allocated to the corresponding slices, and the slice identifiers are globally unique.
The slice network information further includes resource information required by the slice on the corresponding single-domain management and control device, and a slice network topology.
That is to say, the multi-domain management and control device allocates resources globally, and it is only necessary to make each single-domain management and control device perform specific resource reservation to determine whether a slice meeting slice requirements can be established.
When the multi-domain management and control device performs resource reservation, for resources managed and controlled by several single-domain management and control devices, it is necessary to send the network information of the slice to all the single-domain management and control devices, so that each single-domain management and control device performs resource reservation locally.
102, when receiving network information of a slice sent by a multi-domain control device, a single-domain control device calculates resources for the slice based on local resources according to the network information of the slice; if the calculation is successful, reserving the calculated resources for the slice, and informing the multi-domain control device that the resource reservation is successful; otherwise, notifying the multi-domain management and control equipment that the resource reservation fails.
In the embodiment of the present application, when a single domain management and control device calculates resources for a slice based on local resources, it is necessary to consider a network slice policy in network information of the slice, and perform resource calculation by resource physical isolation, resource logical isolation, or resource sharing, and a manner of calculating a network topology based on the policy is not limited in the embodiment of the present application.
And 103, when the multi-domain management and control device receives the message that the resource reservation is successful, fed back by all the single-domain management and control devices corresponding to the resource of the slice, the multi-domain management and control device returns the message that the slice is successful to the client.
When all the single-domain control devices corresponding to the resources of one slice feed back a message of successful reservation, determining that the slice is successfully established; otherwise, resource reservation needs to be carried out on the slice again, and the steps are repeated again until the slice meeting the requirements is established, or a message that the slice meeting the requirements cannot be established is returned to the client.
Referring to fig. 2, fig. 2 is a diagram of a system for creating slices according to slicing requirements in an embodiment of the present application. In fig. 2, one client, one multi-domain managing device and two single-domain managing devices are taken as examples.
The client sends the slicing requirements to the multi-domain management and control equipment through the client, and the client communicates with the multi-domain management and control equipment through the northbound interface.
When receiving a slice requirement sent by a client, the multi-domain management and control device determines whether the service type and the resource corresponding to the slice requirement are adjustable, calculates the slice required by the client based on the local service layer resource slice, reserves the network resource when the calculation is successful, and allocates a globally unique slice identifier, such as slice 5, to the slice.
Assuming that the reserved resources and the intra-domain network controlled by two single-domain control devices (a single-domain control device 1 and a single-domain control device 2) corresponding to the topology corresponding to the slice are both provided, the network information of the slice 5 is sent to the single-domain control device 1 and the single-domain control device 2, where the network information of the slice 5 includes: a network slicing policy (slicing network resource physical isolation) of the slice 5, an operation policy (resource adjustable), a domain network and required network resources managed by the single domain management and control device 1, and a domain network and required network resources managed by the single domain management and control device 2.
When the multi-domain management and control device sends the sliced network information to the single-domain management and control device, the sliced network information can be sent through an inter-controller layer interface (I-CPI).
And when the single-domain control device 1 and the single-domain control device 2 receive the network information of the slice 5, respectively calculating and reserving resources for the slice 5 based on the local resources.
The processing procedures of the single-domain management and control device 1 and the single-domain management and control device 2 are consistent, taking the processing procedure of the single-domain management and control device 1 as an example:
the single-domain management and control equipment 1 performs resource reservation based on the required network resources in the local domain under the requirement of physical isolation of slice network resources; if the reservation is successful, returning a message of successful reservation to the multi-domain controller; otherwise, returning a message of reservation failure.
The processing procedure of the single domain management device 2 is similar to that of the single domain management device 1 and will not be described in detail here.
When the multi-domain controller receives messages returned by the single-domain control device 1 and the single-domain control device 2, if the returned messages are all resource reservation success messages, feeding back a message of successful slice creation to the client, and completing the slice creation process; if the returned message is not the successful message of resource reservation, recalculating the slice and reserving the resource until the establishment of the slice is completed or the slice meeting the requirements of the slice cannot be established, and returning the message of slice establishment failure to the client.
The network information of the network slice is transmitted between the multi-domain management and control device and the single-domain management and control device, so that each management and control device can maintain resources locally, and if the multi-domain management and control device completes the partition of the slice network resources based on the local topology resource information, the single-domain management and control device needs to be informed of which resources are allocated to which slice network, so that the network slice resources are isolated from each other in the operation and maintenance process.
Management and control are integrated, sliced network information is transmitted from top to bottom, and a network slicing strategy is carried in the network information to establish slices meeting requirements.
Example two
Referring to fig. 3, fig. 3 is a schematic flowchart of recalculating slices when a network fails in the embodiment of the present application. The method comprises the following specific steps:
The method specifically comprises the following steps:
and when the single domain management and control equipment receives the network fault message, recalculating a recovery path for the service borne by the slice based on local resources according to the network information of the affected slice.
When the restoration path is recalculated for the network information of the affected slice, the restoration path needs to be recalculated for the slice in the local domain according to the network slice policy of the slice.
And step 304, after the service recovery is completed, reporting a service state change message to the multi-domain management and control device.
And step 306, if the calculation fails, reporting a network fault message to the multi-domain management and control device.
EXAMPLE III
When network resource adjustment is needed for a slice due to the change of network resources, the operation strategy of the slice is determined.
When the operation strategy of the slice is resource adjustable, directly adjusting the resource of the slice;
when the operation strategy of the slice is resource fixation, the multi-domain management and control equipment negotiates with the client, and whether the resource of the slice is adjusted or not is determined according to the negotiation result.
That is, if the client agrees to perform resource adjustment, the resource adjustment is performed; and if the client does not agree to perform resource adjustment, the resource adjustment is not performed.
Example four
The traditional network resource information is obtained from bottom to top, from a transport network device to a single domain management and control device and then to a multi-domain management and control device, and is reported upwards step by step, and the new slice network resource information is transmitted from top to bottom, in order to ensure the efficiency of information transmission, and the information security transmitted between different management and control systems, in the embodiment of the application, on the basis of a general management and control model, a VN network model is provided, objects such as VN, virtual links, virtual nodes, virtual ports and the like are defined, and the method is used for managing the VN network topology and transmitting interface information between the management and control devices, and specifically comprises the following steps:
in the embodiment of the application, the network topology of each slice is respectively defined as a virtual network VN, and each VN has a globally unique ID;
and defining the physical nodes in the network topology of each slice as virtual nodes, defining the physical ports as virtual ports, defining the physical links as virtual links, and setting the ID of the VN corresponding to each virtual node, virtual port and virtual link.
Wherein the content of the first and second substances,
the mapping relation between the virtual node and the physical node is one-to-many or many-to-one;
the mapping relation between the virtual port and the physical port is one-to-many or many-to-one;
the mapping relationship between the virtual link and the physical link is one-to-many, or many-to-one.
The schematic structure of the slice control model, i.e. the VN topology, is given in detail below with reference to the accompanying drawings.
Referring to fig. 4, fig. 4 is a schematic diagram comparing a general control model and a slice control model.
The topology in the slice Network is defined as a Virtual Network (VN) which has a globally unique identifier, the VN comprises Virtual nodes and Virtual links, and the information of the resources of the whole slice Network can be directly transmitted among different levels of management and control equipment through a VN object, so that the information interaction quantity of the Network resources acquired among management and control systems is reduced;
nodes, ports and links in the slice network are defined as Virtual nodes (VNode), virtual links (VLink) and Virtual ports (VNEP), so as to represent that the above objects are abstracted from physical nodes/ports/links, and a locally unique identifier and an identifier of the VN to which the objects belong are added in the object definition. The mapping relationship between the virtual node/virtual link/virtual port and the physical node/link/port is many-to-one, or one-to-many.
In specific implementation, virtualization may also be performed on a Service port and a Service, where the Service port is mapped to a Virtual Network Service End Point (VNSEP) VNSEP, and the Service is mapped to a Virtual Network Service (VNS).
After VN is defined, the specific definition for the network slice policy is as follows:
slicing network resource physical isolation; if network resources between the slice 1 and the slice 2 corresponding to the VN1 and the VN2 are physically isolated, the VN1 and the VN2 adopt independent client-side ports;
a link at the line side between the VN1 and the VN2 is established by adopting an independent optical fiber or a tunnel based on time slots, such as an OTN/SDH;
slicing network resource logical isolation, i.e. soft isolation; if network resources between the slice 3 and the slice 4 corresponding to the VN3 and the VN4 are logically isolated, the VN3 and the VN4 client side ports may not be independent client side ports, and the isolation is performed by using client VLAN information;
the VN3 and VN4 line sides are carried by using a packet-switched tunnel, and under the condition of ensuring the basic bandwidth (such as CIR) of a client, the bandwidth on the same physical link can be shared with the tunnel between other VNs.
Slice network resource sharing, for example, network resource sharing between the slice 5 and the slice 6 corresponding to the VN5 and the VN6, the client side ports of the VN5 and the VN6 may not be independent client side ports, and are isolated by using client VLAN information; the line side uses the packet switched tunnel for carrying, and can share the bandwidth on the same physical link with the tunnel between other VNs under the condition that the basic bandwidth (such as CIR) of the client is not guaranteed.
After VN is defined, the specific definition of the operation strategy for the slice is as follows:
network resources are adjustable: under the condition that VN1-VN2 services are in failure and no other resources are available in the VN, the resources of the slice network can be temporarily increased, and the success of service recovery is guaranteed;
network resources are not adjustable:
in case of a network failure, the resources of the VN are not adjustably increased, at which point the traffic restoration is not successful if there are insufficient resources inside the VN.
In this case, the multi-domain management and control device needs to negotiate with the client to determine whether the network resources of the corresponding slice can be adjusted.
Based on the same inventive concept, the embodiment of the application also provides an optical transmission network slice control system. Referring to fig. 5, fig. 5 is a schematic diagram of a slicing control system of an optical transmission network in an embodiment of the present application. The system comprises: a multi-domain management and control device and a single-domain management and control device;
when receiving a slice requirement sent by a client, the multi-domain control device divides network resources for a slice corresponding to the slice requirement based on local resources and reserves the resources; notifying the network information of the slice to the single-domain control equipment corresponding to the reserved resources; wherein the network information comprises: a network slicing strategy; when receiving a message of successful resource reservation fed back by all the single-domain control devices corresponding to the resources of the slice, returning the message of successful slice to the client;
when receiving the network information of the slice sent by the multi-domain control equipment, the single-domain control equipment calculates resources for the slice based on local resources according to the network information of the slice; if the calculation is successful, reserving the calculated resources for the slice, and informing the multi-domain control device that the resource reservation is successful; otherwise, notifying the multi-domain management and control equipment that the resource reservation fails.
Preferably, the first and second electrodes are formed of a metal,
the single-domain management and control device is further configured to, when receiving a network fault message reported by a network device, recalculate a restoration path for a service borne by a slice affected by the network fault based on a local resource, and if the calculation is successful, issue an intra-domain service restoration operation to the network device to perform service path restoration; after the service is recovered, reporting a service state change message to the multi-domain management and control equipment;
and the multi-domain management and control device is further configured to send a notification of a service path change to the client corresponding to the slice when receiving the service state change message.
When the single domain management and control device receives the network failure message and recalculates a restoration path for the service carried by the slice affected by the network failure based on the local resource, the method further includes:
if the calculation is failed, reporting a network fault message to the multi-domain management and control equipment;
and when the multi-domain management and control equipment receives a network fault message, re-creating the slice influenced by the network fault.
Preferably, the first and second electrodes are formed of a metal,
when the single domain management and control device receives the network fault message, recalculating a recovery path for the service loaded by the slice affected by the network fault based on the local resource, including:
and when the single domain management and control equipment receives the network fault message, recalculating a recovery path for the service borne by the slice based on local resources according to the network information of the affected slice.
Preferably, the first and second electrodes are formed of a metal,
when network resources need to be adjusted for a slice due to the change of the network resources, determining an operation strategy of the slice;
when the operation strategy of the slice is resource adjustable, adjusting the resource of the slice;
when the operation strategy of the slice is fixed, the multi-domain management and control device negotiates with the client, and determines whether to adjust the resource of the slice according to a negotiation result.
Preferably, the first and second electrodes are formed of a metal,
respectively defining the network topology of each slice as a virtual network VN, wherein each VN has a globally unique ID;
and defining the physical nodes in the network topology of each slice as virtual nodes, defining the physical ports as virtual ports, defining the physical links as virtual links, and setting the ID of the VN corresponding to each virtual node, virtual port and virtual link.
Wherein, the first and the second end of the pipe are connected with each other,
the mapping relation between the virtual node and the physical node is one-to-many or many-to-one;
the mapping relation between the virtual port and the physical port is one-to-many or many-to-one;
the mapping relationship between the virtual link and the physical link is one-to-many, or many-to-one.
Referring to fig. 6, fig. 6 is a schematic diagram of a slicing network management and control architecture in the embodiment of the present application.
Fig. 6 illustrates an example of one multi-domain managing device and two single-domain managing devices.
And the client sends the slicing requirements to the multi-domain management and control equipment through the client.
The multi-domain control equipment calculates and reserves resources for the slice based on the local resources, generates network information of the slice according to the reserved resources and the slice requirements, and sends the network information to the single-domain control equipment corresponding to the slice; the multi-domain management and control device realizes the following functions: storing topological resources, slice management and control, service management and control, alarm performance and storing related data.
When the single-domain control equipment receives the sliced network information, slice resource calculation is carried out and resources are reserved, and when the reservation is successful, the multi-domain control equipment is informed; the single domain management and control device realizes the following functions: storing, calculating and storing topology resources, slice management and control, alarm performance, service management and control, and storing related data.
And carrying out slice management and control interaction between the multi-domain management and control equipment and the single-domain management and control equipment, and monitoring and controlling the network equipment in the optical network by the single-domain management and control equipment.
In summary, the present application defines a slice configuration policy and a slice operation policy parameter by a network resource slice policy definition mode; in the process of establishing a slicing network and the operation and maintenance process, the recovery process of the network with faults; in order to ensure efficient transmission of slice network information among different controllers, a slice network model definition mode is adopted. By the scheme, the network slice management and control process can be optimized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. An optical transmission network slice management method, the method comprising:
when receiving a slice requirement sent by a client, multi-domain management and control equipment divides network resources for a slice corresponding to the slice requirement based on local resources and reserves the resources; notifying the network information of the slice to the single-domain control equipment corresponding to the reserved resources; wherein the network information comprises: a network slicing strategy;
when the single-domain control equipment receives the network information of the slice sent by the multi-domain control equipment, calculating resources for the slice based on local resources according to the network information of the slice; if the calculation is successful, reserving the calculated resources for the slice, and informing the multi-domain control device that the resource reservation is successful; otherwise, notifying the multi-domain management and control equipment of resource reservation failure;
when the multi-domain control device receives the message of successful resource reservation fed back by all the single-domain control devices corresponding to the resource of the slice, the multi-domain control device returns the message of successful slice to the client;
wherein the method further comprises:
when a network device detects a network fault, reporting a network fault message to a single-domain management and control device which manages and controls the network;
when the single domain management and control equipment receives the network fault message, recalculating a recovery path for the service loaded by the slice affected by the network fault based on local resources, and if the recalculation is successful, issuing intra-domain service recovery operation to the network equipment to perform service path recovery;
after the service is recovered, reporting a service state change message to the multi-domain control equipment;
and when receiving the service state change message, the multi-domain management and control device sends a notification of service path change to the client corresponding to the slice.
2. The method according to claim 1, wherein when the single domain management and control device receives the network failure message and recalculates a restoration path for the traffic carried by the slice affected by the network failure based on the local resource, the method further comprises:
if the calculation is failed, reporting a network fault message to the multi-domain management and control equipment;
and when the multi-domain management and control equipment receives a network fault message, re-creating the slice influenced by the network fault.
3. The method according to claim 1, wherein when the single domain management and control device receives the network failure message, recalculating a restoration path for the traffic carried by the slice affected by the network failure based on a local resource includes:
and when the single domain management and control equipment receives the network fault message, recalculating a recovery path for the service borne by the slice based on local resources according to the network information of the affected slice.
4. The method of claim 1, wherein the sliced network information further comprises: a slicing operation strategy; wherein the slicing operation strategy comprises: the network resource of the slice is adjustable and fixed;
the method further comprises:
when network resources need to be adjusted for a slice due to the change of the network resources, determining an operation strategy of the slice;
when the operation strategy of the slice is resource adjustable, adjusting the resource of the slice;
when the operation strategy of the slice is resource fixation, the multi-domain management and control equipment negotiates with the client, and whether the resource of the slice is adjusted or not is determined according to the negotiation result.
5. The method of any of claims 1-4, wherein the network slicing policy; wherein the network slicing policy comprises: slicing network resource physical isolation, slicing network resource logical isolation or slicing network resource sharing;
the sliced network information further includes:
slice identification, resource information required on the corresponding single-domain management and control equipment, and the network topology of the slice.
6. The method of claim 5,
respectively defining the network topology of each slice as a virtual network VN, wherein each VN has a globally unique ID;
and defining the physical nodes in the network topology of each slice as virtual nodes, defining the physical ports as virtual ports, defining the physical links as virtual links, and setting the ID of the VN corresponding to each virtual node, virtual port and virtual link.
7. The method of claim 6,
the mapping relation between the virtual node and the physical node is one-to-many or many-to-one;
the mapping relation between the virtual port and the physical port is one-to-many or many-to-one;
the mapping relationship between the virtual link and the physical link is one-to-many, or many-to-one.
8. An optical transmission network slice management and control system, the system comprising: a multi-domain management and control device and a single-domain management and control device;
when receiving a slice requirement sent by a client, the multi-domain management and control equipment divides network resources for a slice corresponding to the slice requirement based on local resources and reserves the resources; notifying the network information of the slice to the single-domain control equipment corresponding to the reserved resources; wherein the network information comprises: a network slicing strategy; when receiving a message of successful resource reservation fed back by all the single-domain control devices corresponding to the resources of the slice, returning the message of successful slice to the client;
the single-domain control equipment calculates resources for the slice based on local resources according to the network information of the slice when receiving the network information of the slice sent by the multi-domain control equipment; if the calculation is successful, reserving the calculated resources for the slice, and informing the multi-domain control device that the resource reservation is successful; otherwise, notifying the multi-domain management and control equipment of resource reservation failure;
wherein the content of the first and second substances,
the single-domain management and control device is further configured to, when receiving a network fault message reported by a network device, recalculate a restoration path for a service carried by a slice affected by the network fault based on a local resource, and if the calculation is successful, issue an intra-domain service restoration operation to the network device to perform service path restoration; after the service is recovered, reporting a service state change message to the multi-domain control equipment;
and the multi-domain management and control device is further configured to send a notification of a service path change to the client corresponding to the slice when receiving the service state change message.
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