WO2017024521A1

WO2017024521A1 - Cross-layer service configuration method and controller

Info

Publication number: WO2017024521A1
Application number: PCT/CN2015/086644
Authority: WO
Inventors: 高志江
Original assignee: 华为技术有限公司
Priority date: 2015-08-11
Filing date: 2015-08-11
Publication date: 2017-02-16
Also published as: CN106716935A; CN106716935B

Abstract

Disclosed in an embodiment of the invention is a cross-layer service configuration method, comprising: establishing, by a controller, and according to a service model, an electrical layer planning chart and an optical layer planning chart, wherein the electrical layer planning chart comprises information of a resource on an electrical layer network estimated to be occupied to satisfy a service, and the optical layer planning chart comprises information of a resource on an optical layer network estimated to be occupied to satisfy the service; and searching, by the controller, and according to the service model, for matches in the electrical layer planning chart and the optical layer planning chart, and upon successful matches, establishing paths corresponding to the service in the electrical layer network and the optical layer network. The above technical solution increases a utilization rate of network resources, realizes parallel processing of cross-layer services, and increases a service configuration efficiency.

Description

Method and controller for cross-layer service configuration

Technical field

The present invention relates to the field of communications, and in particular, to a method and a controller for configuring a cross-layer service.

Background technique

At present, the transport network usually adopts a layered structure. For example, the top-down structure can be divided into the following three layers: IP (Internet Protocol), network layer, and OTN (Optical Transport Network). Network layer and WDM (Wavelength-division Multiplexing) network layer.

In a multi-layer network, a two-layer network is taken as an example for description. The upper layer network is a client/service model that directly carries data services from customers, and the lower layer network is used to construct topological relationships of upper layer networks. Generally speaking, the upper the layer, the smaller the service switching granularity, and the lower the layer, the larger the service switching granularity. That is to say, the lower layer network has a larger switching granularity and transmission capability than the upper layer network, thereby providing a pipeline service for the upper layer network and carrying the services of the upper layer network. For example, as shown in FIG. 1, the services carried between the links D-E in the upper layer network may be provided by the N1-N4-N3 connections in the lower layer network.

Therefore, service planning and deployment in a multi-layer network involves resource allocation of the upper and lower layers of the network. In the prior art, each layer network in a multi-layer network operates independently, and a two-layer network composed of an electrical layer network (OTN) and an optical layer network (WDM) is taken as an example. The optical layer network provides statically configured physical resources for the electrical layer network, including physical nodes, physical links, and bandwidth. After the optical layer network is deployed, the corresponding static and independent electrical layer network topology is obtained. The electrical layer network can independently plan and deploy the electrical layer services according to the electrical layer network resources. when When the resources of the electrical layer network are insufficient, new physical resources can be requested from the optical layer network according to current service requirements. The optical layer network is expanded to further obtain a new electrical layer network topology. In the prior art, the optical and electrical two-layer network independently performs service planning and deployment, and the resource allocation between the layers is manually completed, and the network operation and maintenance efficiency and the network resource utilization rate are low.

Summary of the invention

In view of this, the embodiments of the present invention provide a method and a controller for configuring a cross-layer service, which can solve the problem of low network operation and maintenance efficiency and low network resource utilization in a multi-layer network.

In a first aspect, the embodiment of the present invention provides a method for configuring a cross-layer service, including: the controller is configured to establish an electrical layer planning table and an optical layer planning table according to the service model, where the electrical layer planning table includes meeting the service in the electrical layer. The resource information to be occupied by the network, the optical layer planning table includes resource information that is to be occupied by the optical layer network, and the controller is configured in the electrical layer planning table and the optical layer according to the service model. A matching is performed in the table, and if the matching is successful, a path corresponding to the service is established in the electrical layer network and the optical layer network.

In conjunction with the implementation of the first aspect, in a first possible implementation manner of the first aspect, before the controller establishes the electrical layer planning table and the optical layer planning table, the controller further includes: the controller determining the electrical layer network resource Insufficient to plan a new resource in the optical layer network; the controller establishes the optical layer planning table according to the new resource of the optical layer network, and according to the electrical layer corresponding to the new resource in the optical layer network A new resource in the network is established in the electrical layer network.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, the service model includes: a deterministic service model.

In combination with the first aspect, or any of the possible implementations of the first to second aspects of the first aspect, In a third possible implementation manner of the first aspect, the service model includes: a predictive type of service model.

With reference to the first aspect, or any one of the first to third possible implementation manners of the first aspect, in the fourth possible implementation manner of the first aspect, the electrical layer planning table according to the service model Before the matching with the optical layer planning table, the controller further includes: performing, by the controller, performing service pre-computation in the electrical layer network according to the determined service model, and obtaining a service corresponding to the determined service model. Resource information to be occupied in the electrical layer network.

With reference to the first aspect, or any one of the first to fourth possible implementations of the first aspect, in a fifth possible implementation manner of the first aspect, the controller is in the electrical layer according to the service model The matching between the planning table and the optical layer planning table includes: the controller matching the service ID in the service model according to the service ID in the electrical layer planning table, according to the service model The service ID is matched with the service ID in the optical layer planning table.

With reference to the first aspect, or any one of the first to fifth possible implementation manners of the first aspect, in a sixth possible implementation manner of the first aspect, the controller is in the electrical layer according to the service model The planning table and the optical layer planning table are matched, including:

The controller matches the source node, the sink node, and the link type in the electrical layer planning table according to the source node, the sink node, and the bandwidth of the service in the service model, and according to the electrical layer planning The association relationship between the optical layer entries in the table and/or the optical layer planning table is matched to the optical layer planning table.

In a second aspect, an embodiment of the present invention provides a controller, including: a path calculation unit, configured to establish an electrical layer planning table and an optical layer planning table according to a service model, where the electrical layer planning The information includes the resource information that is to be occupied by the service layer in the electrical layer network, the optical layer planning table includes resource information that is to be occupied by the service layer in the optical layer network, and the service request unit is configured to use the service model according to the service model. Performing matching in the electrical layer planning table and the optical layer planning table; the service processing unit, configured to: if the service model matches successfully in the electrical layer planning table and the optical layer planning table, Establishing a path corresponding to the service in the layer network and the optical layer network.

With reference to the implementation of the second aspect, in a first possible implementation manner of the second aspect, the controller, further includes: a resource processing unit, configured to determine that the electrical layer network resource is insufficient, in the optical layer network Planning a new resource; the path calculation unit is further configured to establish the optical layer planning table according to a new resource in the optical layer network, and according to the electrical layer network corresponding to the new resource in the optical layer network A new resource is established in the electrical layer network.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in the second possible implementation manner of the second aspect, the service model includes: a deterministic service model.

With reference to the second aspect, or any one of the first to the second possible implementation manners of the second aspect, in a third possible implementation manner of the second aspect, the service model includes: a predictive type of service model.

With reference to the second aspect, or any one of the first to third possible implementations of the second aspect, in the fourth possible implementation manner of the second aspect, the path calculation unit is further configured to: determine according to the determining The service model performs service pre-computation in the electrical layer network, and obtains resource information to be occupied by the service corresponding to the determined service model in the electrical layer network.

With reference to the second aspect, or any one of the second to fourth possible implementation manners, in the fifth possible implementation manner of the second aspect, the service requesting unit is further configured to: according to the service The service identifier ID in the model is matched with the service ID in the electrical layer planning table, and the service ID in the service model is matched with the service ID in the optical layer planning table.

With reference to the second aspect, or any one of the first to fifth possible implementation manners of the second aspect, in the sixth possible implementation manner of the second aspect, the service requesting unit is further configured to: according to the service The source node, the sink node, and the bandwidth of the service in the model are matched with the source node, the sink node, and the link type in the electrical layer planning table, and according to the electrical layer planning table and/or the optical layer The association relationship of the optoelectronic layer entries in the planning table matches the optical layer planning table.

In a third aspect, a controller includes: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer to execute an instruction, the processor and the memory are connected through a bus, and when the computer is running, the processor executes the computer execution of the memory storage An instruction to cause a computer to perform the method of any one of the first aspect and the first aspect.

According to the technical solution provided by the embodiment of the present invention, the controller controls the electrical layer network and the optical layer network to perform dynamic and flexible adjustment on network resources, thereby improving the utilization of network resources. By establishing the electrical layer planning table and the optical layer planning table, the service can be planned in advance. When the actual service is generated, the electrical layer planning table and the optical layer planning table established in advance are matched at the same time, and the parallel operation of the cross-layer service is realized. Processing improves the efficiency of business configuration.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the prior art, the drawings used in the description of the background and the embodiments will be briefly described below. Obviously, only a part of the embodiments of the present invention are described in the following drawings, and other drawings or drawings may be obtained according to the drawings and descriptions without any creative work by those skilled in the art. The embodiments are intended to cover all such derived figures or embodiments.

1 is a schematic diagram of the architecture of a multi-layer network;

2 is a schematic diagram of a multi-layer network architecture for implementing an embodiment of the present invention;

3 is a schematic diagram of a multi-layer network architecture for implementing an embodiment of the present invention;

4 is a schematic diagram of a multi-layer network architecture for implementing an embodiment of the present invention;

FIG. 5 is a schematic diagram of another multi-layer network architecture for implementing an embodiment of the present invention; FIG.

6 is a schematic diagram of another multi-layer network architecture for implementing an embodiment of the present invention;

7 is a schematic diagram of another multi-layer network architecture for implementing an embodiment of the present invention;

FIG. 8 is an exemplary flowchart of a method for implementing cross-layer service configuration according to an embodiment of the present invention; FIG.

9 is a schematic diagram showing the logical structure of a controller for implementing an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a computer device implementing an embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Obviously, The described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 2 is a schematic diagram of a multi-layer network architecture according to an embodiment of the present invention. As shown in FIG. 2, the multi-layer network includes an electrical layer network 201 and an optical layer network 202. The electrical layer network 201 and the optical layer network 202 are centrally controlled by the controller 203. The electrical layer network 201 and the optical layer network 202 can be connected to the controller 203 through a control channel, wherein the controller 203 can transmit control commands to the nodes of the electrical layer network 201 or the optical layer network 202 through the control channel. The electrical layer network and the optical layer network can be centrally controlled by one controller, and can also be independently controlled by two controllers. The controller 203 may be a SDN (Software Defined Network) centralized controller, and may be a server or a computer.

In a specific implementation process, the controller 203 may include a path calculation unit 204, a resource processing unit 205, a service request unit 206, a service processing unit 207, and the like.

The path calculation unit 204 is configured to establish an electrical layer planning table according to an optical layer planning table established by the optical layer network resource and according to the electrical layer network resource. Specifically, the electrical layer network resources and the optical layer network resources may include various physical resources, such as physical nodes, physical links, and bandwidths. Specifically, the electrical layer planning table is a plan for the electrical layer network resources, and the information in the table may include the route, the link type, and the association relationship of the photoelectric layer entries in the planned electrical layer network. The optical layer planning table is a plan for the optical layer network resources. The information in the table may include the routes, crossovers, and associations of the optical layer entries in the planned optical layer network. Specifically, the planning of the electrical layer network resources may be the planning of the electrical layer links, and the planning of the optical layer network resources may be the planning of the optical layer connections. The electrical layer link refers to two in the electrical layer network. The connection between adjacent nodes may include information such as a route and a link type. The optical layer connection refers to the connection between the source node and the sink node in the optical layer network, and may pass through one or more nodes in the middle, and may include routing, cross, and the like. The route in the electrical layer planning table refers to the connection relationship of physical nodes in the electrical layer network; the link type can be used to indicate the maximum transmission unit and supported bandwidth carried on the link, such as OTU2 (Optical Transport Unit 2) 2) The maximum transmission unit of the link is ODU2 (Optical Channel Data Unit 2), and the transmission bandwidth is 10 Gbps; the route in the optical layer planning table refers to the connection relationship of physical nodes in the optical layer network; The intersection of the optical layer entry and the electrical layer link is established by the intersection of the optical layer and the electrical layer. The electrical layer planning table and the optical layer planning table may perform service planning according to the traffic matrix information of the network when the network is initialized; or plan the future predicted service according to the current network traffic or historical traffic data in advance during the network operation; Planning can be based on a defined business. The business mentioned here refers to the data that customers (such as Google, eBay, etc.) need to transmit on the network. The service plan refers to establishing an electrical layer planning table in the electrical layer network according to the source, sink node, and bandwidth of the service, and establishing an optical layer planning table in the optical layer network.

The resource processing unit 205 is configured to store resource information of the optical layer network and the electrical layer network, and the resource information is used to provide the path calculation unit 204 with the basis for calculation.

The service requesting unit 206 is configured to receive a service request, perform entry matching in the electrical layer planning table and the optical layer planning table according to the service request, or directly receive the service request through the path calculation unit 204 to perform path calculation.

The service processing unit 207 is configured to build a result according to the entry of the service request unit 206. The service path is returned, or when the service request unit fails to match, the message that the service establishment fails is returned.

The controller 203 may further include an update unit (not shown) for performing maintenance updates on the electrical layer planning table and the optical layer planning table. For example, after the matching of the service request unit 206 is successful, and the service processing unit 207 successfully establishes the service path according to the matching result of the entry, the electrical layer planning table and the optical layer planning table are related to the successfully established service path. The table item is updated. Or, when the electrical layer network resource and/or the optical layer network resource are changed, if the physical link fault causes the electrical layer planning table or part of the optical layer planning table to be invalid, the re-planning and update of the entry may be triggered.

In the embodiment of the present invention, the controller controls the electrical layer network and the optical layer network to perform dynamic and flexible adjustment on network resources, thereby improving the utilization of network resources. By establishing the electrical layer planning table and the optical layer planning table, the service can be planned in advance. When the actual service is generated, the electrical layer planning table and the optical layer planning table established in advance are matched at the same time, and the parallel operation of the cross-layer service is realized. Processing improves the efficiency of business configuration.

FIG. 3 is a schematic diagram of a multi-layer network architecture according to an embodiment of the present invention. This embodiment can be applied to scenarios in which a deterministic service is planned. As shown in FIG. 3, it is assumed that the electrical layer network has no link resources at the initial time (time t1). In the specific implementation process, it is assumed that a certain type of service needs to be opened at time t2 (t2>t1), for example, service 001, a service with a bandwidth of 5G between A-Bs, and a service with a bandwidth of 2.5G between services 002 and C-D. Specifically, the deterministic business model is shown in Table 1.

业务标识IDBusiness ID	源节点Source node	宿节点Sink node	带宽bandwidth
业务标识IDBusiness ID	源节点Source node	宿节点Sink node	带宽bandwidth	001001	AA	BB	5G5G

002

C

D

2.5G

Table 1

In this embodiment, the electrical layer network and the optical layer network are centrally controlled by the controller. Specifically, the controller may be an SDN centralized controller. The specific implementation process is as follows:

S301: The controller establishes an electrical layer planning table and an optical layer planning table according to the determined service model.

In the specific implementation process, since the electrical layer network has no link resources, the controller needs to drive the optical layer network according to the service model determined in Table 1 in advance (at time t2) to generate a simulated optical layer connection, that is, as shown in Table 2 Individual entries in the optical layer plan table shown. Specifically, the optical layer planning table may include a service ID, a source node, a sink node, a route, a cross, a connection ID, an association relationship of the optoelectronic layer entries, and the like. Wherein, the route is path information passing between the source node and the sink node, for example, the route from the source node A' to the sink node B' is A'-E'-F'-B', that is, A' to B' Between E', F'. The cross indicates that a connection channel between the connection node and the link to which it is located is established on the node. For example, E'11 indicates that a connection channel from A'-E' to E' and from E' to E'-F' is established on the node E'. The connection ID may identify the connection, for example, 0x00b1 represents a connection between A'-B', corresponding to a source node, a sink node, a route, an intersection, etc. between A'-B'.

Further, the controller generates an analog electrical layer link according to the analog optical layer connection of the optical layer network, that is, each entry in the electrical layer planning table as shown in Table 3. Specifically, the electrical layer planning table may include a service ID, a source node, a sink node, a route, a link type, a link ID, and an association relationship of the photoelectric layer entries. The route is the path information passing between the source node and the sink node, for example, the route from the source node A to the sink node B is A-B. Link type available Indicates the maximum transmission unit and supported bandwidth carried on the link, such as the OTU2 link. The maximum transmission unit is ODU2 and the transmission bandwidth is 10Gbps. The link ID may identify the link, for example, 0x00a1 represents the link A-B, and corresponds to the source node, the sink node, the route, the link type, and the like between the A-Bs.

The service ID can represent the service carried by the electrical layer link and its corresponding optical layer connection. The same electrical layer link and its corresponding optical layer connection can carry multiple services. For example, only one is used, for example, AB. Business 001 is carried between. The optical layer connection in the optical layer planning table and the electrical layer link in the electrical layer planning table may be associated by the association relationship of the optical layer entries. For example, the connection 0x00b1 in the optical layer planning table corresponds to the electrical layer planning table. Link 0x00a1. As shown in FIG. 4, an analog optical layer connection is established in the optical layer network, and an analog electrical layer link corresponding to the analog optical layer connection is also established in the electrical layer network.

Table 2

table 3

S302: The controller performs service pre-computation in the electrical layer network according to the determined service model.

Specifically, the controller performs service pre-computation in the electrical layer network according to the determined service model and the electrical layer planning table in Table 1. For example, for service 001, that is, a service with a bandwidth of 5 G between the two, the service pre-computation result is AB, that is, the route passes through the electrical layer planning table 0x00a1 link, and four time slots TS1-TS4 are reserved, corresponding to the A and B nodes. The upper crosses are A11 and B11 respectively. For service 002, that is, the service with a bandwidth of 2.5G between CDs, the service pre-calculation result is CD, that is, the route passes through the electrical layer planning table 0x00a2 link, and two time slots TS1 are reserved. -TS2, the intersections on the corresponding C and D nodes are C11 and D11 respectively.

Table 4

The pre-computation of the electrical layer network is to improve the efficiency of the service configuration. Alternatively, when the deterministic service is enabled (t2), the electrical layer service calculation is performed after the electrical layer planning table is successfully matched.

S303: The controller performs service configuration by using an electrical layer planning table and an optical layer planning table.

When the time t2 arrives, the deterministic service needs to be opened, and the controller matches the deterministic service model with the electrical layer planning table and the optical layer planning table. Specifically, it may be performed according to the service ID in the determined service model, the service ID in the electrical layer planning table, and the optical layer planning table. Matching; matching may also be performed according to the source node, the sink node, and the source node, the sink node, and the link type in the bandwidth and electrical layer planning table according to the determined service model, and further according to the electrical layer planning table and/or the optical layer planning table. The association relationship between the optical layer entries is matched to the optical layer planning table. After the electrical layer planning table is successfully matched, the service pre-computation result of the electrical layer network is obtained according to the matching result of the electrical layer planning table. After the optical layer planning table is successfully matched, the intersection is established on the corresponding node of the optical layer network, and the service is established in the electrical layer network according to the service pre-computation result of the electrical layer network.

For example, for service 001, that is, a deterministic service with an inter-AB bandwidth of 5G, the intersections A'11, E'11, F'11, and B'11 are arranged in the optical layer network to form an optical layer between A'-B'. Connection; for service 002, that is, a defined service with a bandwidth of 2.5 G between CDs, the intersections C'11, E'12, F'12, D'11 are arranged in the optical layer network to form light between C'-D' Layer connection. At the same time, in the electrical layer topology formed by the simulated electrical layer link, for service 001, that is, a deterministic service with an inter-AB bandwidth of 5G, the crossover A11 and B11 are configured, and the reserved TS1-TS4 time slot is used to carry the 5G service; For service 002, that is, a deterministic service with a bandwidth of 2.5 G between CDs, cross-C11 and D11 are configured, and the reserved TS1-TS2 timeslots are used to carry 2.5G services.

In the embodiment of the present invention, the controller controls the electrical layer network and the optical layer network to perform dynamic and flexible adjustment on network resources, thereby improving the utilization of network resources. By establishing the electrical layer planning table and the optical layer planning table, the advanced planning of the deterministic service can be realized. When the actual service is generated, the electrical layer planning table and the optical layer planning table established in advance are simultaneously matched to realize the cross-layer service. Parallel processing improves the efficiency of business configuration.

FIG. 5 is a schematic diagram of another multi-layer network architecture according to an embodiment of the present invention. This embodiment can be applied to scenarios in which a predictive type of service is planned. As shown in Figure 5, assume the initial time (t3 At the moment, there is a wavelength channel between the node A' and the node B' in the optical layer network that can carry 10G services, corresponding to the OTU2 link between the node A and the node B in the electrical layer network.

In the specific implementation process, it is assumed that the operator analyzes the traffic between the electrical layer networks AB according to the traffic of the existing network and the historical traffic data by means of big data or data mining, and increases the current 8G at t4 (t4>t3). To 18G, the OTU2 link of the existing electrical layer network will not be carried. Table 5 shows the service model of the predicted service. According to the predictive service model, the bandwidth between the A-Bs needs to be expanded to 20G.

源节点Source node	宿节点Sink node	带宽bandwidth
源节点Source node	宿节点Sink node	带宽bandwidth	AA	BB	10G10G

table 5

S401: The controller establishes an electrical layer planning table and an optical layer planning table according to the predictive business model.

In the specific implementation process, if it is predicted that the service corresponding to the predictive type of service model shown in Table 5 needs to be opened at time t4, the controller needs to advance (before time t4) according to the prediction in Table 5 because the link resources of the electrical layer network are insufficient. The type of business model drives the optical layer network to plan and generate simulated optical layer connections, that is, the individual entries in the optical layer planning table as shown in Table 6. Specifically, the optical layer planning table may include a source node, a sink node, a route, a cross, a connection ID, an association relationship of the optoelectronic layer entries, and the like. Specifically, trigger conditions of the optical layer network plan may be set, for example, when the available bandwidth between A-Bs is less than 1 G, or other similar threshold conditions are monitored. The route is the path information that passes between the source node and the sink node. For example, the route from the source node A' to the sink node B' is A'-E'-F'-B', that is, A' to B' pass E', F'. The cross indicates that a connection channel between the connection node and the link to which it is located is established on the node. For example, E'11 indicates that a connection channel from A'-E' to E' and from E' to E'-F' is established on the node E'. The connection ID may identify the connection, for example, 0x00b1 indicates a connection between A'-B', and corresponds to a source node, a sink node, a route, and an intersection between A'-B'.

Further, the controller generates an analog electrical layer link according to the analog optical layer connection of the optical layer network, that is, each entry in the electrical layer planning table as shown in Table 7. Specifically, the electrical layer planning table may include a source node, a sink node, a route, a link type, a link ID, an association relationship of the photoelectric layer entries, and the like. The route is the path information passing between the source node and the sink node, for example, the route from the source node A to the sink node B is A-B. The link type can be used to indicate the maximum transmission unit and supported bandwidth carried on the link, such as an OTU2 link, with a maximum transmission unit of ODU2 and a transmission bandwidth of 10 Gbps. The link ID may identify the link, for example, 0x00a1 represents the link A-B, and corresponds to the source node, the sink node, the route, the link type, and the like between the A-Bs.

The optical layer connection in the optical layer planning table and the electrical layer link in the electrical layer planning table may be associated by the association relationship of the optical layer entries. For example, the connection 0x00b1 in the optical layer planning table corresponds to the electrical layer planning table. Link 0x00a1. As shown in FIG. 6, a simulated optical layer connection is established in the optical layer network, and an analog electrical layer link corresponding to the analog optical layer connection is also established in the electrical layer network.

Table 6

Table 7

S402: The controller performs service configuration through the electrical layer planning table and the optical layer planning table according to the triggering condition.

In the specific implementation process, the triggering condition of the service configuration may be preset in the controller. For example, when the available bandwidth between the ABs is less than 0.5G, the matching service model may be matched with the electrical layer planning table and the optical layer planning table. . Specifically, the source node, the sink node, and the source node, the sink node, and the link type in the bandwidth and electrical layer planning table are matched according to the predictive type of service model, and further according to the electrical layer planning table and/or the optical layer planning table. The association relationship of the optoelectronic layer entries matches the optical layer planning table. After the electrical layer planning table and the optical layer planning table are successfully matched, a crossover is established on the corresponding node of the optical layer network, and a real electrical layer link is obtained to cope with the increased traffic at the predicted time (time t4).

For example, for a predictive type service with a bandwidth of 10 G between A-Bs, intersections A'11, E'11, F'11, B'11 are arranged in the optical layer network to form an optical layer connection between A'-B'. At the same time, a true electrical layer link, such as link A-B, is established, that is, the route passes through the electrical layer planning table 0x00a2 link, and its link type is OTU2.

In the embodiment of the present invention, the controller controls the electrical layer network and the optical layer network to perform dynamic and flexible adjustment on network resources, thereby improving the utilization of network resources. and By establishing the electrical layer planning table and the optical layer planning table, the advanced planning of the predictive service can be realized. When the actual service is generated, the electrical layer planning table and the optical layer planning table established in advance are matched at the same time, and the parallel operation of the cross-layer service is realized. Processing improves the efficiency of business configuration.

FIG. 7 is a schematic diagram of another multi-layer network architecture according to an embodiment of the present invention. This embodiment can be applied to scenarios in which a certain type of customer's deterministic service is planned. The deterministic service here may specifically be a virtual network topology or a virtual connection provided to the client, or may be a real data service. This embodiment takes two customers as an example. As shown in FIG. 7, it is assumed that the electrical layer network has no link resources at the initial time (time t5). In the specific implementation process, it is assumed that a certain type of service needs to be opened at time t6 (t6>t5), and the specific service model is shown in Table 8. In Table 8, it is necessary to provide the client 1 with a virtual connection having a bandwidth of 10G between the A-Bs, and to provide the client 2 with a virtual connection having a bandwidth of 40G between the A-Ds. Specifically, the virtual network topology refers to fine-grained physical network resources into virtual network resources through a virtualization technology on a shared physical platform, and then abstracts, divides, and combines according to the same, and forms a plurality of isolated ones. Parallel programmable virtual network. For example, the physical resources of the optical layer network and the physical resources of the electrical layer network are abstracted, divided, and combined to form a plurality of independent virtual networks, which are provided to different customers. A virtual connection refers to a point-to-point connection in a virtual network topology.

客户IDCustomer ID	源节点Source node	宿节点Sink node	带宽bandwidth
客户IDCustomer ID	源节点Source node	宿节点Sink node	带宽bandwidth	11	AA	BB	10G10G
22	AA	DD	40G40G	11	AA	BB	10G10G

Table 8

S501: The controller establishes an electrical layer planning table and an optical layer planning table according to the determined service model.

In the specific implementation process, since the electrical layer network has no link resources, the controller needs to drive the optical layer network according to the service model determined in Table 8 in advance (at time t6) to generate a simulated optical layer connection, that is, as shown in Table 9. Individual entries in the optical layer plan table shown. Specifically, the optical layer planning table may include a source node, a sink node, a route, a cross, a connection ID, a customer ID, an association relationship of the optoelectronic layer entries, and the like. Wherein, the route is path information passing between the source node and the sink node, for example, the route from the source node A' to the sink node B' is A'-B'. The cross indicates that a connection channel between the connection node and the link to which it is located is established on the node. For example, A'11 indicates that a communication channel from A' to A'-B' is established on the node A'. The connection ID may identify the connection, for example, 0x00b1 represents a connection between A'-B', corresponding to a source node, a sink node, a route, an intersection, etc. between A'-B'.

Further, the controller generates an analog electrical layer link according to the analog optical layer connection of the optical layer network, that is, each entry in the electrical layer planning table as shown in Table 10. Specifically, the electrical layer planning table may include a source node, a sink node, a route, a link type, a link ID, a client ID, and an association relationship of the photoelectric layer entries. The route is the path information passing between the source node and the sink node, for example, the route from the source node A to the sink node B is A-B. The link type can be used to indicate the maximum transmission unit and supported bandwidth carried on the link, such as an OTU2 link, with a maximum transmission unit of ODU2 and a transmission bandwidth of 10 Gbps. The link ID may identify the link, for example, 0x00a1 represents the link A-B, and corresponds to the source node, the sink node, the route, the link type, and the like between the A-Bs.

The customer number can represent the electrical layer link and its corresponding optical layer connection bearer. For the home service, the same electrical layer link and its corresponding optical layer connection can carry multiple customer services. For example, the virtual connection between customer A and customer 2 is between A-B. The optical layer connection in the optical layer planning table and the electrical layer link in the electrical layer planning table may be associated by the association relationship of the optical layer entries. For example, the connection 0x00b1 in the optical layer planning table corresponds to the electrical layer planning table. Link 0x00a1. As shown in FIG. 7, an optical layer connection is established for two customers in the optical layer network, and an analog electrical layer link corresponding to the analog optical layer connection is also established for the two customers in the electrical layer network.

Table 9

Table 10

S502: The controller receives the service request sent by the client, and performs service configuration according to the electrical layer planning table and the optical layer planning table.

Specifically, when the time t6 arrives, the client sends a service request to the controller. Customer sent The business request can be implemented by C-C (Client Controller). Specifically, the service request may carry the determined service model information as shown in Table 8, including the virtual connection information required by the client.

The controller matches the deterministic business model with the electrical layer planning table and the optical layer planning table. Specifically, the customer ID in the determined service model may be matched with the customer ID in the electrical layer planning table and the optical layer planning table; and the source node, the sink node, and the bandwidth and the electrical layer may be determined according to the determined service model. The source node, the sink node, and the link type in the planning table are matched, and the optical layer planning table is further matched according to the association relationship of the photoelectric layer entries in the electrical layer planning table and/or the optical layer planning table. After the electrical layer planning table and the optical layer planning table are successfully matched, a crossover is established on the corresponding node of the optical layer network, and resources are pre-allocated in the electrical layer network.

For example, for a virtual connection with a bandwidth of 10 G between the clients 1 in the inter-AB, the intersections A'11 and B'11 are arranged in the optical layer network to form an optical layer connection between A'-B'; In the 40G virtual connection, the intersections A'12, B'12 and B'13, D'11 are arranged in the optical layer network to form an optical layer connection between A'-B' and B'-D'. At the same time, in the electrical layer topology formed by the simulated electrical layer link, for the virtual connection with the bandwidth of 10G between the clients 1 and the link of the link type OTU2 (that is, the route passes through the 0x00a1 link in the electrical layer planning table). Reserved for the TS1-TS8 time slot; for the virtual connection with the 10G bandwidth between the ADs of the client 1, the TS1 is reserved in the link type OTU3 (that is, the route passes through the 0x00a2 link in the electrical layer planning table) The TS32 time slot reserves TS1-TS32 time slots in the BD of the link type OTU3 (ie, the route passes through the 0x00a3 link in the electrical layer planning table).

After the optical layer network path is successfully established, the controller allocates pre-allocated resources to the guest. The user, wherein the pre-allocated resource information is as shown in Table 11.

客户IDCustomer ID	链路IDLink ID	预分配时隙 Pre-allocated time slot
客户IDCustomer ID	链路IDLink ID	预分配时隙 Pre-allocated time slot	11	0x00a10x00a1	TS1-TS8TS1-TS8
22	0x00a20x00a2	TS1-TS32TS1-TS32	11	0x00a10x00a1	TS1-TS8TS1-TS8
22	0x00a20x00a2	TS1-TS32TS1-TS32	22	0x00a30x00a3	TS1-TS32TS1-TS32

Table 11

In the embodiment of the present invention, the controller controls the electrical layer network and the optical layer network to perform dynamic and flexible adjustment on network resources, thereby improving the utilization of network resources. By establishing the electrical layer planning table and the optical layer planning table, it is possible to isolate and distribute the services of multiple customers, avoiding resource conflicts between different customers, and when the actual service is generated, the electrical layer planning table and light established in advance. Layer planning tables are matched at the same time, which realizes parallel processing of cross-layer services and improves the efficiency of service configuration.

FIG. 8 is an exemplary flowchart of a cross-layer service configuration method according to an embodiment of the present invention. The method may be performed by a controller. Specifically, the controller may be an SDN centralized controller, and may be a server or a computer. Perform the following steps:

S801: The controller establishes an electrical layer planning table and an optical layer planning table according to the service model, where the electrical layer planning table includes resource information that is to be occupied by the service layer in the electrical layer network, where the optical layer planning table includes: Resource information to be occupied by the optical layer network.

In the specific implementation process, the business model may include a deterministic business model and a predictive business model. The deterministic business model can be determined according to the customer's needs, and the predictive business model can predict the future business based on the existing network traffic or historical data.

The optical layer planning table can be based on the source node and the sink node of the service model in the optical layer network. Line resource planning. The optical layer planning table may specifically include: a source node, a sink node, a route, a cross, a connection ID, and an association relationship of the optoelectronic layer entries. For a deterministic business model, a service ID can also be included to avoid resource conflicts when the service matches.

The electrical layer planning table can perform resource planning in the electrical layer network according to the results of the optical layer planning table and the bandwidth of the service model. The electrical layer planning table may specifically include: a source node, a sink node, a route, a link type, a link ID, and an association relationship of the photoelectric layer entries. For a deterministic business model, a service ID can also be included to avoid resource conflicts when the service matches.

Specifically, before the electrical layer planning table and the optical layer planning table are established, if the resources of the electrical layer network are insufficient, new resources are planned in the optical layer network, that is, new physical resources that are not occupied. The controller establishes an optical layer planning table according to the new resource, and establishes an electrical layer planning table in the new resource of the corresponding electrical layer network.

S802: The controller performs matching in the electrical layer planning table and the optical layer planning table according to the service model, and if the matching is successful, establishing the foregoing in the electrical layer network and the optical layer network. The path corresponding to the business.

Specifically, the controller may match the source node, the sink node, and the link type in the electrical layer planning table according to the source node, the sink node, and the bandwidth in the service model, and according to the electrical layer planning table and/or the optical layer plan. The association relationship of the photoelectric layer entries in the table matches the optical layer planning table.

For a deterministic business model, the controller can match the service ID in the deterministic business model with the service ID in the electrical layer planning table and the optical layer planning table. For a deterministic business model, optionally, before the matching between the electrical layer planning table and the optical layer planning table according to the deterministic business model, the controller may also be based on the deterministic business model and the electrical layer The layer planning table is matched, and the service pre-computation is performed in the electrical layer network, and the resource information that the service corresponding to the service model is to occupy in the electrical layer network, for example, the occupied time slot, is obtained.

FIG. 9 is a schematic diagram of a logical structure of a controller 900 according to an embodiment of the present invention. Specifically, the controller may be an SDN centralized controller, and may specifically be a server or a computer. As shown in FIG. 9, the controller 900 includes a path calculation unit 901, a service request unit 902, and a service processing unit 903. The specific functions of each unit are as follows:

The path calculation unit 901 is configured to establish an electrical layer planning table and an optical layer planning table according to the service model, where the electrical layer planning table includes resource information that is to be occupied by the service layer in the electrical layer network, where the optical layer planning table includes The resource information that the service is intended to occupy on the optical layer network.

The service requesting unit 902 is configured to perform matching in the electrical layer planning table and the optical layer planning table according to the service model.

The service processing unit 903 is configured to establish, in the electrical layer network and the optical layer network, the corresponding service if the service model is successfully matched in the electrical layer planning table and the optical layer planning table. path.

The path calculation unit 901 performs resource planning in the optical layer network according to the source node and the sink node of the service model to obtain an optical layer planning table. The optical layer planning table may specifically include: a source node, a sink node, a route, a cross, a connection ID, and an association relationship of the optoelectronic layer entries. For a deterministic business model, a service ID can also be included to avoid resource conflicts when the service matches.

The path calculation unit 901 performs resource planning in the electrical layer network according to the result of the optical layer planning table and the bandwidth of the service model, to obtain an electrical layer planning table. The electrical layer planning table may specifically include: a source node, a sink node, a route, a link type, a link ID, and an association relationship of the photoelectric layer entries. For a deterministic business model, a service ID can also be included to avoid resource conflicts when the service matches.

Specifically, the controller further includes a resource processing unit, configured to: before the electrical layer planning table and the optical layer planning table are established, if the resources of the electrical layer network are insufficient, a new resource is planned in the optical layer network, that is, the original resource is not occupied. New physical resources. The path calculation unit 901 establishes an optical layer planning table according to the new resource, and establishes an electrical layer planning table in the corresponding new resources of the electrical layer network.

Specifically, the service requesting unit 902 can match the source node, the sink node, and the link type in the electrical layer planning table according to the source node, the sink node, and the bandwidth in the service model, and according to the electrical layer planning table and/or the light. The association relationship of the photoelectric layer entries in the layer plan table matches the optical layer planning table.

For the deterministic service model, the service requesting unit 902 can match the service ID in the deterministic type of service model with the service ID in the electrical layer planning table and the optical layer planning table. For a deterministic business model, optionally, in a deterministic type of business model Before the matching between the row table and the optical layer planning table, the path calculating unit 901 can perform matching according to the determined service model and the electrical layer planning table, and perform service pre-computation in the electrical layer network, and obtain the service corresponding to the service model. Resource information to be occupied in the electrical layer network, for example, occupied time slots.

FIG. 10 is a schematic structural diagram of a computer device 1000 according to an embodiment of the present invention. As shown in FIG. 10, the computer device 1000 includes a processor 1001, a memory 1002, an input/output interface 1003, a communication interface 1004, and a bus 1005. The processor 1001, the memory 1002, the input/output interface 1003, and the communication interface 1004 implement a communication connection with each other through the bus 1005.

The processor 1001 may be a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or at least one integrated circuit for executing related programs to implement the present invention. The technical solution provided by the embodiment of the invention.

The memory 1002 may be a read only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1002 can store an operating system and other applications. When the technical solution provided by the embodiment of the present invention is implemented by software or firmware, The program code of the technical solution provided by the embodiment of the present invention is stored in the memory 1002 and executed by the processor 1001.

The input/output interface 1003 is for receiving input data and information, and outputting data such as an operation result.

Communication interface 1004 enables communication between computer device 1000 and other devices or communication networks using transceivers such as, but not limited to, transceivers.

Bus 1005 can include a path for communicating information between various components of computer device 1000 (e.g., processor 1001, memory 1002, input/output interface 1003, and communication interface 1004).

In a specific implementation process, the transfer controller executes the code stored in the memory 1002 by the processor 1001, and implements: establishing an electrical layer planning table and an optical layer planning table according to the service model, where the electrical layer planning table includes satisfying the service in the electrical layer The resource information to be occupied by the network, the optical layer planning table includes resource information that is to be occupied by the service in the optical layer network, and is matched in the electrical layer planning table and the optical layer planning table according to the service model. And if the matching is successful, establishing a path corresponding to the service in the electrical layer network and the optical layer network.

In the embodiment of the present invention, the electrical layer planning table and the optical layer planning table are established, and the service can be planned in advance. When the actual service is generated, the electrical layer planning table and the optical layer planning table established in advance are simultaneously matched, and the implementation is implemented. Parallel processing of cross-layer services improves the efficiency of service configuration.

Those of ordinary skill in the art will appreciate that various aspects of the present invention, or possible implementations of various aspects, may be embodied as a system, method, or computer program product. Thus, aspects of the invention, or possible implementations of various aspects, may be in the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, etc.), or a combination of software and hardware aspects, They are collectively referred to herein as "circuits," "modules," or "systems." Furthermore, aspects of the invention, or possible implementations of various aspects, may take the form of a computer program product, which is a computer readable program code stored in a computer readable medium.

The computer readable medium can be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium includes, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing, such as random access memory (RAM), read only memory (ROM), Erase programmable read-only memory (EPROM or flash memory), optical fiber, portable read-only memory (CD-ROM).

The processor in the computer reads the computer readable program code stored in the computer readable medium such that the processor is capable of performing the various functional steps specified in each step of the flowchart, or a combination of steps; A device that functions as specified in each block, or combination of blocks.

The computer readable program code can execute entirely on the user's computer, partly on the user's computer, as a separate software package, partly on the user's computer and partly on the remote computer, or entirely on the remote computer or server. . It should also be noted that in some alternative implementations, the functions noted in the various steps in the flowcharts or in the blocks in the block diagrams may not occur in the order noted. For example, two steps, or two blocks, shown in succession may be executed substantially concurrently or the blocks may be executed in the reverse order.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

The above is only a few embodiments of the present invention, and various modifications and changes may be made thereto without departing from the spirit and scope of the invention.

Claims

A method for configuring a cross-layer service, characterized in that the method comprises:

The controller establishes an electrical layer planning table and an optical layer planning table according to the service model, where the electrical layer planning table includes resource information that is to be occupied by the service layer in the electrical layer network, and the optical layer planning table includes that the service layer is in the optical layer. Resource information to be occupied by the network;

And the controller performs matching in the electrical layer planning table and the optical layer planning table according to the service model, and if the matching is successful, establishing the service correspondence in the electrical layer network and the optical layer network. path of.
The method according to claim 1, wherein before the controller establishes the electrical layer planning table and the optical layer planning table, the method further includes:

The controller determines that the electrical layer network resource is insufficient, and plans a new resource in the optical layer network;

The controller establishes the optical layer planning table according to new resources in the optical layer network, and according to new resources in the electrical layer network corresponding to new resources in the optical layer network, in the electrical layer network. Establish the electrical layer planning table.
The method of claim 1 or 2, wherein the business model comprises: a deterministic business model.
The method of claim 1 or 2, wherein the business model comprises: a predictive business model.
The method of claim 3, wherein before the matching between the electrical layer planning table and the optical layer planning table according to the service model, the method further comprises:

The controller performs in the electrical layer network according to the determined type of service model The service pre-calculation obtains the resource information that the service corresponding to the determined service model is to occupy in the electrical layer network.
The method according to any one of claims 1-3, wherein the controller performs matching in the electrical layer planning table and the optical layer planning table according to the service model, including:

The controller matches the service ID in the electrical layer planning table according to the service identifier ID in the service model, and matches the service ID in the optical layer planning table according to the service ID in the service model. .
The method according to any one of claims 1-4, wherein the controller performs matching in the electrical layer planning table and the optical layer planning table according to the service model, including:

The controller matches the source node, the sink node, and the link type in the electrical layer planning table according to the source node, the sink node, and the bandwidth of the service in the service model, and according to the electrical layer planning The association relationship between the optical layer entries in the table and/or the optical layer planning table is matched to the optical layer planning table.
A controller, wherein the controller comprises:

a path calculation unit, configured to establish an electrical layer planning table and an optical layer planning table according to the service model, where the electrical layer planning table includes resource information that is to be occupied by the service layer in the electrical layer network, where the optical layer planning table includes The resource information that the service intends to occupy in the optical layer network;

a service requesting unit, configured to perform matching in the electrical layer planning table and the optical layer planning table according to the service model;

a service processing unit, configured to establish, in the electrical layer network and the optical layer network, if the service model is successfully matched in the electrical layer planning table and the optical layer planning table The path corresponding to the service.
The controller according to claim 8, wherein the controller further comprises:

a resource processing unit, configured to determine that the electrical layer network resource is insufficient, and plan a new resource in the optical layer network;

The path calculation unit is further configured to establish the optical layer planning table according to a new resource in the optical layer network, and according to a new resource in the electrical layer network corresponding to the new resource in the optical layer network, The electrical layer planning table is established in the electrical layer network.
A controller according to claim 8 or 9, wherein said business model comprises: a deterministic business model.
The controller according to claim 8 or 9, wherein said business model comprises: a predictive type of business model.
The controller according to claim 10, wherein the path calculation unit is further configured to:

Performing service pre-computation in the electrical layer network according to the determined service model, and obtaining resource information that the service corresponding to the determined service model is to occupy in the electrical layer network.
The controller according to any one of claims 8 to 10, wherein the service requesting unit is further configured to:

Matching the service identifier ID in the service model with the service ID in the electrical layer planning table, and matching the service ID in the service model with the service ID in the optical layer planning table.
The controller according to any one of claims 8-11, wherein the service requesting unit is further configured to:

Matching source nodes, sink nodes, and link types in the electrical layer planning table according to the source node, the sink node, and the bandwidth of the service in the service model, and according to the electrical layer planning table and/or The association relationship between the optoelectronic layer entries in the optical layer planning table matches the optical layer planning table.
A controller, comprising: a processor, a memory, a bus, and a communication interface; the memory is configured to store a computer to execute an instruction, the processor is connected to the memory through the bus, when the computer is running The processor executes the computer-executed instructions stored in the memory to cause the computer to perform the method of any one of claims 1-7.