PON system supporting multi-level slicing, OLT device and ONU device

Abstract

The application provides a PON system supporting multi-level slices, an OLT device and an ONU device, and belongs to the technical field of communication. The system comprises an OLT device, an optical distribution network and an ONU device. The OLT device is decomposed into a vOLT management plane and a vOLT user plane through a virtual OLT technology. The OLT device is provided with a first-level network slice management module, and the ONU device is provided with a second-level network slice management module. The second-level network slice management module is used for dividing and managing the second-level network slice of the connected user terminal device. The network slice hierarchical capability is used for dividing the priority and network performance of each service in a large park network, solving the problems of single network slice division, insufficient granularity, inability to completely solve the problems of the concentration of various service types and different requirements, and realizing the intelligentization of the park network and reducing the deployment cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, and in particular to a PON system supporting multi-level slicing, an OLT device and an ONU device. BACKGROUND

[0002] PON (Passive Optical Network) refers to an optical distribution network that does not contain any electronic devices and electronic power supplies, and the ODN (Optical Distribution Network) is entirely composed of passive devices such as optical splitters, without the need for active electronic devices. A passive optical network includes an optical line terminal (OLT) installed at a central control station, and a batch of optical network units (ONUs) installed at user sites. The ODN between the OLT and the ONU includes optical fibers and passive optical splitters or couplers.

[0003] The PON system structure is mainly composed of an OLT at the central office, an ODN containing passive optical devices, optical network units at the user end, and an EMS (Element Management System). It usually adopts a tree topology structure of point-to-multipoint.

[0004] The outstanding advantage of the PON network is that it eliminates outdoor active devices, and all signal processing functions are completed in the switch and the user's home equipment. Its transmission distance is shorter than that of the active optical fiber access system, and the coverage range is smaller, but it is low in cost, does not need to set up a separate machine room, and is easy to maintain. Therefore, this structure can economically serve home users.

[0005] In large park network deployment, especially in industrial parks, there are usually multiple network application scenarios in a park, and different scenarios have different network requirements and priorities, such as industrial production networks, park management networks, enterprise office networks, etc. Even in the same industrial network, different production lines also have different network performance requirements. However, the network slicing technology currently used in industrial networks only has one level, and can only guarantee the slicing isolation between business data streams through the queue priority of traditional network devices. From the perspective of network operation and maintenance and park network deployment cost, it is not desirable to solve related problems by establishing multiple separate networks. Moreover, with the driving of cloud computing, 4K video and other business applications, users' demand for bandwidth is increasing. The existing network slicing division is single and not detailed enough, and cannot completely solve many problems such as the concentration of multiple business types and different requirements. SUMMARY

[0006] The application provides a PON system supporting multi-level slices, an OLT device and an ONU device, to solve the problems of single network slice division, insufficient granularity, and inability to completely solve the problems of concentration of various service types and different needs, realize intelligent park network, and reduce deployment cost.

[0007] The application provides a PON system supporting multi-level slices, comprising an OLT device, an optical distribution network, and an ONU device.

[0008] The OLT device is decomposed into a vOLT management plane and a vOLT user plane through a virtual OLT technology, the vOLT management plane is located in a management control layer and is deployed in a central machine room of a regional network, and the vOLT user plane is located in an infrastructure layer and has the same network location as the OLT device.

[0009] The OLT device is provided with a first-level network slice management module, which is used for dividing and managing the first-level network slice of the ONU device.

[0010] The ONU device is provided with a second-level network slice management module, which is used for dividing and managing the second-level network slice of the connected user terminal device.

[0011] According to the PON system supporting multi-level slices, the resource allocation modification of the second-level network slice of the user terminal device connected to the ONU device is realized through a device management system of a manufacturer of the ONU device.

[0012] According to the PON system supporting multi-level slices, the ONU device supports a second-level network slice identifier, and the device management system identifies and manages different second-level network slices based on the second-level network slice identifier.

[0013] According to the PON system supporting multi-level slices, the OLT device supports a first-level network slice identifier, and a network management system of the regional network identifies and manages different first-level network slices based on the first-level network slice identifier, and identifies and manages second-level network slices subordinate to the first-level network slice based on the second-level network slice identifier.

[0014] According to the PON system supporting multi-level slices, the network management system is specifically used for editing, adding, deleting, and modifying the first-level network slice and the second-level network slice.

[0015] According to the PON system supporting multi-level slices provided by the application, the management strategy of the primary network slice and the secondary network slice is issued to the OLT device through the vOLT control plane.

[0016] According to the PON system supporting multi-level slices provided by the application, the OLT device and the ONU device realize the slice capability by deploying independent physical resources and logical resources.

[0017] According to the PON system supporting multi-level slices provided by the application, the physical resources include user-side ports, and the logical resources include MAC address learning capacity, VLAN and bandwidth.

[0018] The application further provides an OLT device, which is the OLT device in the PON system supporting multi-level slices according to any one of the above.

[0019] The application further provides an ONU device, which is the ONU device in the PON system supporting multi-level slices according to any one of the above.

[0020] The PON system supporting multi-level slices, the OLT device and the ONU device provided by the application decompose the traditional OLT device into a vOLT control plane (vOLT-CP) and a vOLT user plane (vOLT-UP) through virtualized OLT technology, deploy a primary network slice management module on the OLT device and a secondary network slice management module on the ONU device, utilize the characteristics of multi-level network slices to form the subdivision management of large-scale park networks, community networks and other multi-purpose and complex regional networks, form the different priority management of bandwidth and delay in the multi-level network scenario between the network management system of the regional networks and the vOLT-CP, guarantee the different demands and priorities of network quality of different network devices accessed under the same OLT device or even the same ONU device, improve the quality of park networks, solve the problems of single network slice division, insufficient granularity, incomplete solution to the concentration of various business types and different demands, and other problems, and realize the intelligentization of park networks and the reduction of deployment costs. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0022] Figure 1 is a structural schematic diagram of the PON system supporting multi-level slices provided by the application. DETAILED DESCRIPTION

[0023] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0024] It should be noted that, in the description of the embodiments of the present application, the terms "comprise", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitation, the element defined by the statement "comprising a" does not exclude the presence of another identical element in the process, method, article or device comprising the element. The terms "upper", "lower" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise explicitly specified and limited, the terms "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] As shown in Figure 1 The present application provides a PON system supporting multi-level slicing, comprising: an OLT device, an optical distribution network, and an ONU device; the OLT device is connected with the ONU device through the optical distribution network.

[0026] The OLT device is decomposed into a vOLT management and control plane and a vOLT user plane through a virtual OLT technology, the vOLT management and control plane is located in the management control layer and is deployed in the central machine room of the regional network, and the vOLT user plane is located in the infrastructure layer and has the same network location as the OLT device;

[0027] The OLT device is provided with a first-level network slicing management module, and the first-level network slicing management module is used to realize the division and management of the first-level network slicing of the ONU device;

[0028] The ONU device is provided with a secondary network slice management module, which is used to realize the division and management of the secondary network slice of the connected user terminal device.

[0029] Specifically, the regional network includes a PON system, and the OLT device in the PON system includes at least one OLT device. The OLT device can be connected with multiple ONU devices through an optical distribution network, and each ONU device can access multiple user terminal devices (UE, User Equipment).

[0030] The OLT virtualization system adopts a control separation architecture, and decomposes the traditional OLT device into a vOLT management and control plane and a vOLT user plane (vOLT-UP). Among them, the vOLT-CP is located in the management control layer, which can be deployed in the central machine room of the park network or the community network after being cloudified; the vOLT-UP is located in the infrastructure layer, which has the same network location as the traditional OLT device; and the network slice management is performed by using OLT virtualization.

[0031] The first-level network slice management module is deployed on the OLT device, the secondary network slice management module is deployed on the ONU device, and the characteristics of the multi-level network slice are used to form the subdivision management of the large park network, the community network and other multi-purpose and complex regional networks. The network management system of these regional networks and the vOLT-CP form different priority management of bandwidth and delay in the multi-level network scenario, guarantee the different needs and priorities of different network devices connected to the same OLT device or even the same ONU device for network quality, improve the quality of the park network, solve the problems of single network slice division, insufficient granularity, and inability to completely solve the concentration of multiple business types and different needs, and realize the intelligentization of the park network and reduce the deployment cost.

[0032] Each regional network has its own network management system, such as a park network management system, a community network management system, etc. Taking the park network management system as an example, the park network management system can manage the network resource allocation of different application networks (such as production networks, office networks, etc.) in the park.

[0033] In one embodiment, the network management system is also specifically used for editing, adding, deleting and modifying the first-level network slice and the secondary network slice.

[0034] Specifically, the park network management system is deployed with a multi-level network slice management and addition, deletion and modification capability module.

[0035] In one embodiment, the management strategy of the network management system for the first-level network slice and the secondary network slice is issued to the OLT device through the vOLT management and control plane.

[0036] In the park network management system, the vOLT management plane can add, delete or modify the primary and secondary network slices, and the primary and secondary network slices can support multiple slice editing. The park network management system can formulate a network slice management strategy and issue it to the OLT device through the vOLT management plane.

[0037] In an embodiment, the OLT device and the ONU device implement the slice capability by deploying independent physical resources and logical resources. Specifically, the physical resources include user-side ports, and the logical resources include MAC address learning capacity, VLAN and bandwidth.

[0038] For the ONU device, the resource slice capability is implemented by deploying independent physical resources such as user-side ports and logical resources such as MAC address learning capacity, VLAN and bandwidth, so as to realize the secondary network slice division and management of the user terminal device (both wired and wireless) connected to the ONU device. For the ONU device, it only supports the division and management of the secondary network slice, which can reduce the system complexity and the cost of the ONU device.

[0039] In an embodiment, the resource allocation modification of the secondary network slice of the user terminal device connected to the ONU device is implemented through the device management system of the manufacturer to which the ONU device belongs.

[0040] Each manufacturer is equipped with a device management system (EMS, Equipment Management System), and the EMS system can manage and allocate the secondary network slice of the independent ONU device. The EMS system supports the resource allocation modification of the secondary network slice of the user terminal device connected to the ONU device, but does not support the addition, deletion and modification of the secondary network slice division.

[0041] In an embodiment, the ONU device supports the secondary network slice identification, and the device management system identifies and manages different secondary network slices based on the secondary network slice identification.

[0042] Specifically, the ONU device supports the secondary network slice identification, so that the upper network slice (i.e. the primary network slice) and the management system can identify different slices, and the EMS system can directly manage different secondary network slices.

[0043] For the OLT device, the resource slice capability is implemented by deploying independent physical resources such as user-side ports and logical resources such as MAC address learning capacity, VLAN and bandwidth, so as to realize the network slice division and management of the ONU device.

[0044] In one embodiment, the OLT device supports a first-level network slice identifier, and the network management system of the regional network identifies, manages different first-level network slices based on the first-level network slice identifier, and identifies and manages second-level network slices under the first-level network slices based on the second-level network slice identifier.

[0045] Specifically, the OLT device supports a first-level slice identifier, so that the network management system identifies different first-level network slices, and the first-level network slices and the second-level network slices under the first-level network slices can be uniformly managed by the regional network management system.

[0046] For the OLT device, the ONU device is essentially taken as a network slice division object, and the second-level network slice is not directly divided. In the OLT device perspective, there is only a first-level network slice, which further reduces the system complexity. For the ONU device, the second-level network slice is further allocated for the user terminal device under the network bandwidth and other network resources of the first-level network slice allocated by the OLT device. Different user terminal devices can be allocated the same network slice, and the priority and the network slice that can be used are the same.

[0047] The PON system supporting multi-level slices provided by the application separates the user plane from the control plane by using OLT virtualization technology, deploys a network slice management module in the OLT and ONU physical devices, isolates the management of the first-level and second-level network slices, and divides the priority and network performance of each service in a large regional network by using the network slice grading capability, so as to solve the problems of single network slice division, insufficient granularity, and inability to completely solve the problems of concentration of various service types and different demands, and realize the intelligentization of the regional network and the reduction of deployment cost.

[0048] The application further provides an OLT device, which is the OLT device in the PON system supporting multi-level slices according to any one of the above embodiments.

[0049] The application further provides an ONU device, which is the ONU device in the PON system supporting multi-level slices according to any one of the above embodiments.

[0050] The device embodiments described above are only schematic, wherein the units shown as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0051] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A PON system supporting multi-level slicing, characterized in that: include: OLT equipment, optical distribution network, ONU equipment; the OLT equipment is connected to the ONU equipment via the optical distribution network; The OLT device is decomposed into a vOLT control plane and a vOLT user plane through virtual OLT technology. The vOLT control plane is located at the management and control layer and deployed in the central computer room of the regional network. The vOLT user plane is located at the infrastructure layer and has the same network location as the OLT device. The OLT device is provided with a first-level network slice management module, which is used to implement the division and management of the first-level network slice of the ONU device; The ONU device is provided with a secondary network slice management module, which is used to implement the division and management of the secondary network slices of the connected user terminal device; The resource allocation modification of the secondary network slice of the user terminal device connected to the ONU device is implemented through the device management system of the equipment vendor to which the ONU device belongs.

2. The PON system supporting multi-level slicing according to claim 1, characterized in that: The ONU device supports a secondary network slice identifier, and the device management system identifies and manages different secondary network slices based on the secondary network slice identifier.

3. The PON system supporting multi-level slicing according to claim 2, characterized in that: The OLT device supports a first-level network slice identifier, and the network management system of the regional network identifies and manages different first-level network slices based on the first-level network slice identifier, and identifies and manages the second-level network slices under the first-level network slice based on the second-level network slice identifier.

4. The PON system supporting multi-level slicing according to claim 3, characterized in that: The network management system is specifically used to edit, add, delete, and modify the first-level network slice and the second-level network slice.

5. The PON system supporting multi-level slicing according to claim 4, characterized in that: The network management system sends the management policy of the first-level network slice and the second-level network slice to the OLT device through the vOLT management and control plane.

6. The PON system supporting multi-level slicing according to claim 1, characterized in that: The OLT device and the ONU device implement slicing capabilities by deploying independent physical resources and logical resources.

7. The PON system supporting multi-level slicing according to claim 6, characterized in that: The physical resources include user-side ports, and the logical resources include: MAC address learning capacity, VLAN, and bandwidth.

8. An OLT device, characterized in that: An OLT device in a PON system supporting multi-level slicing as described in any one of claims 1 to 7.

9. An ONU device, characterized in that: An ONU device in a PON system supporting multi-level slicing as described in any one of claims 1 to 7.

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