An olt virtualization system based on SDN technology

Abstract

This invention discloses an OLT virtualization system based on SDN technology, belonging to the field of network communication technology. The technical problem to be solved by this invention is the resource shortage, planning difficulties, and mutual interference of capacity improvement in actual deployment. The technical solution adopted is as follows: The OLT virtualization system adopts a control separation architecture, which virtualizes the network functions of the control plane and control function layer. Real-time business intelligent processing units and non-real-time business intelligent processing units are deployed in the cloud on the edge host where the network virtualization is located. The non-real-time business intelligent processing units are deployed on the central cloud. Business isolation is performed by classifying the real-time type of business, forming a unified and open control platform based on cloud edge facilities.

Description

Technical Field

[0001] This invention relates to the field of network communication technology, specifically to an OLT virtualization system based on SDN technology. Background Technology

[0002] PON (Passive Optical Network) refers to an optical distribution network that contains no electronic components or power supplies. The entire ODN (Optical Distribution Network) is composed of passive devices such as optical splitters, eliminating the need for expensive active electronic equipment. A passive optical network includes an optical line terminal (OLT) installed at a central control station and a set of optical network units (ONUs) installed at user locations. The optical distribution network (ODN) between the OLT and ONUs includes optical fibers and passive splitters or couplers.

[0003] A PON system primarily consists of an Optical Line Terminal (OLT) at the central office, an Optical Distribution Network (ODN) containing passive optical devices, Optical Network Units (ONUs / ONTs) at the user end, and an Element Management System (EMS). It typically employs a point-to-multipoint tree topology. The OLT, or Optical Line Terminal, is the terminal equipment used to connect to the fiber optic trunk. The ODN is entirely composed of passive devices such as optical splitters, eliminating the need for expensive active electronic equipment. The ONU, or Optical Network Unit, is further divided into active and passive optical network units.

[0004] The key advantages of PON networks are the elimination of outdoor active equipment; all signal processing is performed within the switches and user premises. Furthermore, this access method requires less upfront investment, with most funding deferred until the user actually connects. While PON networks have shorter transmission distances and smaller coverage areas compared to active fiber optic access systems, they are cheaper, require no separate equipment room, and are easier to maintain. Therefore, this structure can economically serve residential users, but it cannot meet the application needs of large campus networks, facing numerous problems in actual deployment, such as insufficient resources, planning difficulties, and mutual interference during capacity upgrades. Therefore, how to achieve service aggregation, secure isolation, and differentiated services is a pressing technical issue that needs to be addressed. Summary of the Invention

[0005] The technical objective of this invention is to provide an OLT virtualization system based on SDN technology to solve problems such as insufficient resources, planning difficulties, and mutual interference in capacity expansion during actual deployment.

[0006] The technical objective of this invention is achieved as follows: an OLT virtualization system based on SDN technology. This OLT virtualization system adopts a control-transfer separation architecture, virtualizes the control plane and control function layer for network functions, and deploys real-time service intelligent processing units (RSIP units) and non-real-time service intelligent processing units (Non-RSIP units) on the edge host where the network virtualization is located in the cloud. The non-real-time service intelligent processing units (Non-RSIP units) are deployed on the central cloud, and service isolation is performed by classifying service real-time type, forming a unified and open control platform based on cloud edge facilities.

[0007] Preferably, the control plane includes a vOLT control plane (vOLT-CP) and a vOLT user plane (vOLT-UP);

[0008] Among them, the vOLT management plane (vOLT-CP) is located in the management and control layer, and after cloudification, it is deployed in the central computer room of the campus network or community network;

[0009] The vOLT user plane (vOLT-UP) is located at the infrastructure layer, in the same network location as traditional OLT devices.

[0010] More preferably, the vOLT control plane (vOLT-CP) includes a northbound interface layer, a southbound interface layer, and a functional core layer; the functional core layer includes an ONU management unit, an OLT device telemetry management unit, a slice management unit, and a real-time service intelligent processing unit (RSIP unit);

[0011] Among them, the ONU management unit, the OLT equipment telemetry management unit, and the slice management unit are standardized modules.

[0012] More preferably, the Real-Time Service Intelligent Processing Unit (RSIP Unit) includes a service identification and forwarding module and a real-time service processing module. The service identification and forwarding module is used to identify the service type uploaded by the vOLT user plane (vOLT-UP) and transmit real-time services to the Real-Time Service Intelligent Processing Unit (RSIP Unit) according to the identification result, while non-real-time services are forwarded to the non-real-time processing unit (Non-RSIP Unit) deployed on the central cloud. The real-time service processing module is used to process real-time services.

[0013] More specifically, real-time services refer to services that perform QoS configuration data calculation, dynamic bandwidth adjustment (DBA) configuration data calculation, alarm data analysis and emergency handling, and subsequent module upgrades and expansions based on business needs, using AI models distributed from the central cloud.

[0014] More specifically, non-real-time services refer to services that require AI models to process data, such as AI model training, alarm data storage, user-configured data backup storage, and subsequent module upgrades and expansions based on business needs.

[0015] More preferably, the Real-Time Business Intelligent Processing Unit (RSIP Unit) and the Non-Real-Time Business Intelligent Processing Unit (Non-RSIP Unit) communicate with each other through the Northbound Cloud Interface. The Real-Time Business Intelligent Processing Unit (RSIP Unit) uploads non-real-time business data to the central cloud for processing by the Real-Time Business Intelligent Processing Unit (Non-RSIP Unit) through the Northbound Cloud Interface. The Real-Time Business Intelligent Processing Unit (Non-RSIP Unit) distributes the AI ​​model for data processing, which has been trained by the Real-Time Business Intelligent Processing Unit (RSIP Unit), and cloud storage data retrieved by the user from the vOLT Control Plane (vOLT-CP) through the Northbound Cloud Interface.

[0016] Even better, data transmission via the northbound cloud interface employs a resource redundancy judgment mechanism, specifically:

[0017] The network status is determined by the real-time service intelligent processing unit (RSIP unit) and the non-real-time service intelligent processing unit (Non-RSIP unit). Data transmission to the northbound cloud interface can only be carried out when network resources are redundant and the current service is guaranteed not to be affected.

[0018] More preferably, the vOLT control plane (vOLT-CP) communicates with the control function layer through a standardized northbound interface.

[0019] More preferably, the vOLT control plane (vOLT-CP) interoperates with the vOLT user plane (vOLT-UP) through a standardized southbound interface.

[0020] The OLT virtualization system based on SDN technology of the present invention has the following advantages:

[0021] (i) This invention virtualizes the network functions of the control plane and control function layer, deploys real-time business intelligent processing units and non-real-time business forwarding units on the edge host where the network virtualization is located in the cloud, deploys non-real-time business processing units on the central cloud, and divides services by classifying the real-time type of services to form a unified and open control platform based on cloud-edge-device facilities, which improves the flexibility of business logic management and control of network functions, reduces network latency, and solves the interoperability problem between OLT devices and ONU devices from different vendors.

[0022] (ii) With the development of SDN, NFV and cloud computing technologies, promoting the separation of control and management functions of OLT equipment and the cloud-based deployment of control and management functions, thereby reducing network operation and maintenance costs and promoting the rapid introduction of new services, has become a hot topic and future development trend of fixed broadband access networks.

[0023] (III) The goal of OLT network function virtualization is to achieve decoupling of the control plane and user plane through the separation of control and management, centralized cloud deployment of control plane functions, rapid upgrade of access network services, and reduction of operation and maintenance costs.

[0024] (iv) This invention virtualizes the OLT as vOLT-CP and vOLT-UP, and uses its advantages such as "exclusive hardware resources, security isolation, independent management, and exclusive bandwidth" to solve many problems in actual deployment, such as insufficient resources, planning difficulties, and mutual interference of capacity upgrades, so as to achieve business convergence, security isolation and differentiated services.

[0025] (v) This invention achieves flexible scheduling and application of network resources by deploying a real-time service intelligent processing unit in vOLT-CP and combining it with a non-real-time service intelligent processing unit deployed in the central cloud, thereby improving the management of business logic and control of network functions.

[0026] (vi) The present invention’s 4. Data transmission resource redundancy judgment mechanism via the northbound cloud interface improves data transmission efficiency. Attached Figure Description

[0027] The invention will be further described below with reference to the accompanying drawings.

[0028] Appendix Figure 1 This is a block diagram of an OLT virtualization system based on SDN technology.

[0029] Appendix Figure 2 A schematic diagram of an SDN-based broadband access network OLT device;

[0030] Appendix Figure 3 This is a schematic diagram of a traditional OLT device. Detailed Implementation

[0031] The following detailed description of an OLT virtualization system based on SDN technology, with reference to the accompanying drawings and specific embodiments, illustrates the present invention.

[0032] Example 1:

[0033] As attached Figure 1As shown in this embodiment, an OLT virtualization system based on SDN technology is presented. This OLT virtualization system adopts a control-transfer separation architecture, which virtualizes the network functions of the control plane and the control function layer. Real-time service intelligent processing unit (RSIP unit) and non-real-time service intelligent processing unit (Non-RSIP unit) are deployed in the cloud on the edge host where the network virtualization is located. The non-real-time service intelligent processing unit (Non-RSIP unit) is deployed on the central cloud. Service isolation is performed by classifying the real-time type of service, forming a unified and open control platform based on cloud edge facilities.

[0034] In this embodiment, the control plane includes the vOLT control plane (vOLT-CP) and the vOLT user plane (vOLT-UP);

[0035] Among them, the vOLT management plane (vOLT-CP) is located in the management and control layer, and after cloudification, it is deployed in the central computer room of the campus network or community network;

[0036] The vOLT user plane (vOLT-UP) is located at the infrastructure layer, in the same network location as traditional OLT devices, as shown in the attached figure. Figure 2 and 3 As shown.

[0037] In this embodiment, the vOLT control plane (vOLT-CP) includes a northbound interface layer, a southbound interface layer, and a functional core layer; the functional core layer includes an ONU management unit, an OLT device telemetry management unit, a slice management unit, and a real-time service intelligent processing unit (RSIP unit).

[0038] Among them, the ONU management unit, the OLT equipment telemetry management unit, and the slice management unit are standardized modules.

[0039] ONU management unit virtualization removes the OMCI function residing in traditional OLT devices from the OLT devices, standardizes it into a vOMCI module, and together with the vOLT management module that provides the ONU management unit, forms vOLT-CP, which is deployed uniformly and centrally in the operator's cloud platform. Its functions include: ONU online authentication, device management, and device notification.

[0040] In the telemetry-based data acquisition function supported by the OLT device's remote sensing management unit, an active push mode is adopted. This mode supports structured data, boasts higher execution efficiency and more real-time sub-second acquisition accuracy, and has minimal impact on the device's own functions and performance. Combined with SDN applications, it can provide an important big data analysis foundation for rapid network problem localization and network quality optimization, meeting the needs of refined, visualized, and intelligent monitoring and maintenance. In application scenarios where access network devices support telemetry-based data acquisition, the telemetry acquisition system can be divided into an acquisition controller and an OLT. The acquisition controller is responsible for acquisition configuration, receiving telemetry data reported by the OLT, and data processing and analysis. The OLT is responsible for reporting telemetry data according to the acquisition configuration.

[0041] The remote sensing management unit of the OLT device should support the abstraction of backbone network resources and capabilities to implement network slicing functionality. Related resources include access network line resources, forwarding resources, and protocol resources, while related capabilities include pipeline transmission capabilities, traffic scheduling capabilities, network monitoring and maintenance capabilities, and service awareness capabilities. The OLT device should support the dynamic creation, configuration, modification, and deletion of network slices based on PON ports or PON service boards.

[0042] The remote sensing management unit of the OLT device supports the abstraction of backbone network resources and capabilities to realize network slicing function, namely the corresponding slice management unit. The relevant resources of the slice management unit include access network line resources, forwarding resources, protocol resources, etc., and the relevant capabilities of the slice management unit include pipeline transmission capabilities, traffic scheduling capabilities, network monitoring and network maintenance capabilities, service awareness capabilities, etc.

[0043] The Real-Time Service Intelligent Processing Unit (RSIP Unit) in this embodiment includes a service identification and forwarding module and a real-time service processing module. The service identification and forwarding module is used to identify the service type uploaded by the vOLT user plane (vOLT-UP) and transmit the real-time service to the Real-Time Service Intelligent Processing Unit (RSIP Unit) according to the identification result, while non-real-time services are forwarded to the non-real-time processing unit (Non-RSIP Unit) deployed on the central cloud. The real-time service processing module is used to process real-time services.

[0044] In this embodiment, real-time services refer to services that perform QoS configuration data calculation, Dynamic Bandwidth Adjustment (DBA) configuration data calculation, alarm data analysis and emergency handling, and subsequent module upgrades and expansions based on business needs, according to the AI ​​model issued by the central cloud.

[0045] In this embodiment, non-real-time services refer to AI model training, alarm data storage, user-configured data backup storage, and subsequent module upgrades and expansions based on business needs that require AI model data processing in real-time services.

[0046] In this embodiment, the Real-Time Business Intelligent Processing Unit (RSIP Unit) and the Non-Real-Time Business Intelligent Processing Unit (Non-RSIP Unit) communicate with each other through the Northbound Cloud Interface. The Real-Time Business Intelligent Processing Unit (RSIP Unit) uploads non-real-time business data to the central cloud for processing by the Real-Time Business Intelligent Processing Unit (Non-RSIP Unit) through the Northbound Cloud Interface. The Real-Time Business Intelligent Processing Unit (Non-RSIP Unit) sends the AI ​​model for data processing, which has been trained by the Real-Time Business Intelligent Processing Unit (RSIP Unit), and cloud storage data retrieved by the user from the vOLT Control Plane (vOLT-CP) through the Northbound Cloud Interface.

[0047] In this embodiment, data transmission through the northbound cloud interface employs a resource redundancy judgment mechanism, specifically as follows:

[0048] The network status is determined by the real-time service intelligent processing unit (RSIP unit) and the non-real-time service intelligent processing unit (Non-RSIP unit). Data transmission to the northbound cloud interface can only be carried out when network resources are redundant and the current service is guaranteed not to be affected.

[0049] In this embodiment, the vOLT control plane (vOLT-CP) communicates with the control function layer through a standardized northbound interface.

[0050] In this embodiment, the vOLT control plane (vOLT-CP) communicates with the vOLT user plane (vOLT-UP) through a standardized southbound interface.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An OLT virtualization system based on SDN technology, characterized in that, The OLT virtualization system adopts a control-transfer separation architecture, which virtualizes the network functions of the control plane and the control function layer. Real-time business intelligent processing units and non-real-time business intelligent processing units are deployed in the cloud on the edge host where the network virtualization is located. The non-real-time business intelligent processing units are deployed on the central cloud. Business isolation is performed by classifying the real-time type of business, forming a unified and open control platform based on cloud edge facilities. The control plane includes the vOLT control plane and the vOLT user plane; Among them, the vOLT management plane is located in the management and control layer, and after cloudification, it is deployed in the central computer room of the campus network or community network. The vOLT user plane is located in the infrastructure layer; The real-time business intelligent processing unit and the non-real-time business intelligent processing unit communicate with each other through the northbound cloud interface. The real-time business intelligent processing unit uploads non-real-time business data to the central cloud for processing through the northbound cloud interface. The real-time business intelligent processing unit sends the AI ​​model for data processing that has been trained to the real-time business intelligent processing unit and the cloud storage data retrieved by the user from the vOLT management plane through the northbound cloud interface. Data transmission via the northbound cloud interface employs a resource redundancy judgment mechanism; specifically: The network status is determined by the real-time business intelligent processing unit and the non-real-time business intelligent processing unit. Data transmission to the northbound cloud interface can only be carried out when network resources are redundant and the current business is guaranteed not to be affected.

2. The OLT virtualization system based on SDN technology according to claim 1, characterized in that, The vOLT management plane includes a northbound interface layer, a southbound interface layer, and a functional core layer; the functional core layer includes an ONU management unit, an OLT device telemetry management unit, a slice management unit, and a real-time service intelligent processing unit. Among them, the ONU management unit, the OLT equipment telemetry management unit, and the slice management unit are standardized modules.

3. The OLT virtualization system based on SDN technology according to claim 1, characterized in that, The real-time service intelligent processing unit includes a service identification and forwarding module and a real-time service processing module. The service identification and forwarding module is used to identify the service type uploaded by the vOLT user plane and transmit the real-time service to the real-time service intelligent processing unit according to the identification result, while the non-real-time service is forwarded to the non-real-time processing unit deployed on the central cloud. The real-time business processing module is used to handle real-time business.

4. The OLT virtualization system based on SDN technology according to claim 3, characterized in that, Real-time services refer to services that perform QoS configuration data calculation, dynamic bandwidth adjustment configuration data calculation, alarm data analysis and emergency handling, and subsequent module upgrades and expansions based on business needs, using AI models distributed from the central cloud.

5. The OLT virtualization system based on SDN technology according to claim 3, characterized in that, Non-real-time services refer to services that require AI models to process data, such as AI model training, alarm data storage, user-configured data backup storage, and subsequent module upgrades and expansions based on business needs.

6. The OLT virtualization system based on SDN technology according to claim 1, characterized in that, The vOLT control plane communicates with the control function layer through a standardized northbound interface.

7. The OLT virtualization system based on SDN technology according to claim 1, characterized in that, The vOLT control plane communicates with the vOLT user plane through a standardized southbound interface.

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