WO2017193815A1

WO2017193815A1 - Sdn management control method, device and system, and olt

Info

Publication number: WO2017193815A1
Application number: PCT/CN2017/082036
Authority: WO
Inventors: 臧美燕; 李明生; 袁立权; 刁渊炯; 李玉峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-05-10
Filing date: 2017-04-26
Publication date: 2017-11-16
Also published as: CN107360105A; CN107360105B

Abstract

Embodiments provide a software defined network (SDN) management control method, device and system, and an optical line terminal (OLT). The system comprises: an SDN controller configured to control and/or manage optical network units (ONUs) and an OLT within a network governed thereby; and a proxy node connected between the SDN controller and the ONUs and configured to manage and/or control the OLT and one or more of the ONUs on behalf of the SDN controller. According to the embodiments, the problems in the related art of low service processing efficiency and bandwidth resource waste of an SDN controller are solved.

Description

SDN management control method, device and system, OLT

Technical field

This embodiment relates to the field of communications, and in particular, to a method, device, and system for SDN management control, and an OLT.

Background technique

In the related art, the global Internet explosive development composed of various intelligent terminal devices, various cloud service APPs, and a large optical fiber network and a wireless communication network greatly stimulates the diversification and complication of network services. At the same time, with the increasing demand for integrated service communication and the emergence of customized and differentiated requirements, the data forwarding surface of optical networks is developing towards ultra-long-distance, ultra-large capacity and ultra-high speed, and the control management is moving toward Intelligent and flexible, software definition, user interaction, safe and reliable, and energy efficient development. Openness and low cost have become the core objectives of future network development. At the same time, with the rise of Internet OTT (Over The Top) vendors, traditional network operators are gradually “pipelined” and face the “scissors” dilemma. As the first portal for users to access the Internet, the access network is the core of the user's network experience, and is the link between the contact service and the user. With the transformation of the Internet service-driven network architecture, people have put forward new requirements for the optical access network, which needs to be further characterized by intelligence, openness, and service, and the traditional access network architecture and technology are difficult to meet the demand.

The quality of service of the access network is directly related to the vital interests of telecom operators and users. How to achieve fast access for users, fast fault location and recovery, convenient and quick configuration of user terminals, improve user experience, control operating costs and improve network profitability have become an urgent problem for access networks. The traditional access network is basically managed by manual methods, such as user account opening, service handling, and fault handling. This management mode requires a lot of manpower and material resources, so that the operating cost of the access network is high, and the user experience is high. difference. In addition, the existing Customer Premise Equipment (CPE) cannot support flexible service upgrades, resulting in slow development of fixed network operations.

Software Defined Network (SDN) is a new type of network architecture. It aims to separate the control and forwarding of the network and implement programmable control of the underlying device to achieve the goal of open and flexible network configuration. SDN breaks the traditional closed and rigid control system that relies on the formation of proprietary network elements, which provides new ideas for the development of access networks, such as control and forwarding separation, centralized control, etc., so that optical access network equipment gradually With intelligent control capabilities and the ability to provide integrated services, it simplifies operations and improves network operation and maintenance efficiency.

In the related art, FIG. 1 is a schematic diagram of a peer-to-peer management CPE in the related art. As shown in FIG. 1 , the SDN controller manages the CPE by using multiple vCPEs in the controller and multiple CPEs to establish a point-to-point connection. And the peer-to-peer control and management of the CPE. In this case, the processing capability and resource utilization of the SDN controller have high requirements.

However, due to its inherent architectural characteristics (point-to-multipoint), the access network system uses the SDN architecture to achieve centralized control. As shown in Figure 1, in theory, the SDN controller directly controls the optical line terminal (Optical Line Terminal). , referred to as OLT), is connected to the top ten optical network devices (Optical Network Unit, referred to as ONU). The CPE belongs to an ONU. In practical applications, the processing efficiency of the SDN controller, the utilization of public resources, and the utilization of bandwidth may cause problems.

Regarding the above problems in the related art, no effective solution has been found yet.

Summary of the invention

The embodiment provides a method, a device, and a system for SDN management control, and an OLT, to solve at least the problem that the SDN controller in the related art has low processing efficiency and wastes bandwidth resources.

According to an embodiment of the present invention, a system for SDN management control is provided, comprising: a software-defined network SDN controller, configured to control and/or manage an optical network device ONU and an optical line terminal OLT in a network under its jurisdiction; And a proxy node, connected between the SDN controller and the ONU, configured to proxy the SDN controller to manage and/or control the OLT and one or more of the ONUs.

Optionally, a management channel is established between the proxy node and the SDN controller, where the management channel corresponds to a management IP and/or a port number.

Optionally, the proxy node exchanges information with the SDN controller by one of the following protocols: OF-CONFIG, OVSBD, Openflow, Netconf.

Optionally, the proxy node proxying the SDN controller to manage one or more of the ONUs includes: the proxy node proxying the SDN controller to perform control information on one or more of the ONUs An operation: encapsulation, decapsulation, parsing, and forwarding.

Optionally, the proxy node proxying the SDN controller to control the one or more of the ONUs includes: the proxy node receiving, by the SDN controller, the first period for querying the ONU chain a query instruction of a road state; the proxy node sends the query instruction to one or more of the ONUs according to the first period; and receives link information fed back by the one or more ONUs according to the query instruction, and Determining whether the link information indicates that the ONU is normal; and when determining that the link information indicates that the ONU is normal, forwarding the link information to the SDN controller according to a second period, where the The second period is greater than the first period.

Optionally, when determining that the link information indicates that the ONU is abnormal, forwarding the link information to the SDN controller according to a third period, where the third period is less than or equal to the first One cycle.

Optionally, the proxy node proxying the SDN controller to control one or more of the ONUs includes: the proxy node receiving a service forwarding message of the SDN controller, where the service forwarding message includes: a packet sending source port and a packet receiving destination port; determining whether the destination ONU corresponding to the destination port and/or the source ONU corresponding to the source port are included in the ONU set under the proxy node; When the target ONU and the source ONU are included in the ONU set, the packet forwarding between the source ONU and the destination ONU is performed.

Optionally, when the destination ONU and the source ONU are not included in the ONU set of the proxy node, the service forwarding message is discarded.

Optionally, after performing the packet forwarding between the source ONU and the destination ONU, the method further includes: reporting the result of forwarding the packet to the SDN controller.

Optionally, the proxy node is disposed on the OLT, wherein one or more of the ONUs are accessed by the OLT to the SDN controller.

According to another embodiment of the present invention, an optical line terminal OLT is provided. The OLT further includes: an access module connected to one or more ONUs; an interface module connected to the SDN controller; and a proxy node connected to Between the access module and the interface module, the SDN controller is configured to manage and control one or more of the ONUs.

Optionally, a management channel is disposed between the proxy node and the SDN controller, where the management channel corresponds to a management IP and/or a port number.

According to another embodiment of the present invention, a method for SDN management control is provided, comprising: a proxy node receiving a control message sent by an SDN controller for controlling a service of an ONU; the proxy node according to the control message Controlling the service of the ONU; and/or, the proxy node receives a request message sent by the ONU for requesting a service from the SDN; and the proxy node processes the service of the ONU according to the request message.

Optionally, the controlling, by the proxy node, the service of the ONU according to the control message comprises: performing, by the proxy node, one or the following operations on one or more control information of the ONU: encapsulating, decapsulating, parsing And forward.

Optionally, the proxy node receives a control message sent by the SDN controller for controlling the service of the ONU, where the proxy node controls the service of the ONU according to the control message, including: the proxy node receiving the Determining, by the SDN controller, a query instruction for querying the status of the ONU link according to the first period; the proxy node sending the query instruction to one or more of the ONUs according to the first period; receiving one Or the link information fed back by the plurality of ONUs according to the query instruction, and determining whether the link information indicates that the ONU is normal; when determining that the link information indicates that the ONU is normal, according to the second cycle The link information is forwarded to the SDN controller, wherein the second period is greater than the first period.

Optionally, the proxy node receives a control message sent by the SDN controller for controlling the service of the ONU, where the proxy node performs the service of the ONU according to the control message. The control includes: the proxy node receives a service forwarding message of the SDN controller, where the service forwarding message includes: a packet sending source port and a packet receiving destination port; and the proxy node determines the administered ONU set Whether the destination ONU corresponding to the destination port and/or the source ONU corresponding to the source port is included in the source; when the target ONU and the source ONU are included in the ONU set under the proxy node, the source is executed. The packet is forwarded between the ONU and the destination ONU.

According to another embodiment of the present invention, there is provided an apparatus for SDN management control, comprising: a first processing module, configured to receive a control message sent by an SDN controller for controlling a service of an ONU, and according to the The control message controls the service of the ONU; and/or the second processing module is configured to receive a request message sent by the ONU for requesting a service from the SDN, and process the service of the ONU according to the request message.

In this embodiment, the software-defined network SDN controller is configured to control and manage the optical network device ONU and the optical line terminal OLT in the network under control, and the proxy node is connected between the SDN controller and the ONU. Providing that the SDN controller manages and controls the OLT and one or more of the ONUs. Because a proxy node is added between the SDN controller and the ONU, the SDN controller is managed and controlled by the proxy node. The interaction with the ONU avoids the one-to-one control between the SDN controller and the ONU. Therefore, the problem of low efficiency of the SDN controller service processing in the related art and waste of bandwidth resources can be solved, and the entire SDN controller can be improved. Control efficiency, save bandwidth resources, and improve resource utilization.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the embodiments of the present invention, and are intended to be illustrative of the embodiments of the present invention. In the drawing:

1 is a schematic diagram of a peer-to-peer management CPE in the related art;

2 is a network architecture diagram in accordance with an embodiment of the present invention;

3 is a structural diagram of an SDN management control system according to an embodiment of the present invention;

4 is a structural block diagram of an OLT according to an embodiment of the present invention;

FIG. 5 is a block diagram showing an optional structure of an OLT according to an embodiment of the present invention; FIG.

6 is a schematic diagram of an SDN controller directly managing multiple ONUs connected by an OLT according to the related art of the present invention;

7 is a functional architecture diagram of an SDN controller and an access node in an SDN scenario according to Embodiment 3 of the present invention;

8 is a schematic diagram of an access node being a GPON according to Embodiment 3 of the present invention;

9 is a schematic diagram of an access node being an EPON according to Embodiment 3 of the present invention;

10 is a schematic diagram of an access node managing multiple physical CPEs as a proxy according to Embodiment 3 of the present invention;

11 is an interaction diagram of an access node proxy SDN controller performing a query according to Embodiment 3 of the present invention;

FIG. 12 is a schematic diagram of implementing a control plane topology discovery and forwarding by a Proxy proxy module according to Embodiment 3 of the present invention.

detailed description

Hereinafter, the present embodiment will be described in detail with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It should be noted that the terms "first", "second" and the like in the specification and claims of the present embodiment and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or order. .

Example 1

The embodiment of the present application can be run on the network architecture shown in FIG. 2. FIG. 2 is a network architecture diagram according to an embodiment of the present invention. As shown in FIG. 2, the network architecture includes: an access network (OLT), an SDN, and an ONU. The access network serves as an intermediate network between the SDN and the ONU, wherein the access network may further include a switching chip, a PON (passive optical network) MAC (Media access control), SDN may also include an SDN controller, a configuration controller, and an interaction between the access network and the SDN through an open flow or a net conf network exchange model.

In this embodiment, a system for SDN management control running in a network architecture is provided. FIG. 3 is a system structural diagram of SDN management control according to an embodiment of the present invention. As shown in FIG. 3, the system includes:

The SDN controller 30 is configured to control and manage the optical network device ONU and the optical line terminal OLT in the network under the jurisdiction;

The proxy node 32 is connected between the SDN controller and the ONU and is configured as a proxy SDN controller to manage and control the OLT and one or more ONUs.

Through the system of the embodiment, the software defines a network SDN controller, which is configured to control and manage the optical network device ONU and the optical line terminal OLT in the network under the jurisdiction, and the proxy node is connected between the SDN controller and the ONU, and is set. To manage and control the OLT and one or more ONUs for the proxy SDN controller, since the proxy node is added between the SDN controller and the ONU, the interaction between the SDN controller and the ONU is managed and controlled by the proxy node to avoid The one-to-one control between the SDN controller and the ONU can solve the problem that the SDN controller in the related art has low processing efficiency and wastes bandwidth resources, thereby improving the control efficiency of the entire SDN controller, saving bandwidth resources, and improving The effect of resource utilization.

Optionally, the above proxy node 32 may be set on the proxy server, but is not limited thereto.

In this embodiment, the proxy node may be disposed on the OLT, wherein one or more ONUs access the SDN controller through the OLT.

In an alternative embodiment in accordance with the present embodiment, a management channel is established between the proxy node and the SDN controller, wherein the management channel corresponds to the management IP and/or port number. Therefore, the management channel between the SDN controller and each ONU can be avoided, resulting in insufficient management resources (such as management IP address and port number). There are many protocols for the interaction between the proxy node and the SDN controller. Here are examples: OF-CONFIG, OVSBD, Openflow, and Netconf.

The proxy node is responsible for the interaction between the SDN controller and the ONU, and manages and controls the ONU. Including a variety of situations and scenarios, the following specific instructions:

The proxy node proxy SDN controller manages one or more ONUs including: the proxy node performs one of the following operations on the control information of the SDN controller for one or more ONUs: encapsulation, decapsulation, parsing, and forwarding.

The proxy node proxy SDN controller controls one or more ONUs, and the interaction process includes:

S11. The proxy node receives a query instruction that is sent by the SDN controller according to the first period for querying the status of the ONU link.

S12. The proxy node sends a query instruction to one or more ONUs according to the first period.

S13. Receive link information fed back by one or more ONUs according to the query instruction, and determine whether the link information indicates that the ONU is normal.

S14. When determining that the link information indicates that the ONU is normal, forward the link information to the SDN controller according to the second period, where the second period is greater than the first period.

By reducing the forwarding frequency, the bandwidth of the SDN controller is greatly reduced and the processing efficiency is improved, and the normal control of the ONU by the SDN controller is not affected. The foregoing implementation manner may be that after the authentication registration process is completed between the ONU and the access node PON MAC and the corresponding state of the SDN controller is reported, the SDN controller needs to periodically maintain the link state of each ONU, so that the link of the ONU needs to be periodically queried. information.

Optionally, as another branch, when determining that the link information indicates that the ONU is abnormal, the method further includes: S15, forwarding the link information to the SDN controller according to the third period, where the third period is less than or equal to the first period. . Here, the SDN controller can help the ONU to react quickly and effectively.

In an optional implementation scenario according to this embodiment, the proxy node proxy SDN controller controls one or more ONUs, and the interaction process includes:

S21, the proxy node receives the service forwarding message of the SDN controller, where the service forwarding message includes: a source port for sending a message, and a destination port for receiving the packet;

S22. Determine whether the destination port corresponds to the ONU set under the proxy node. Source ONU corresponding to the ONU and/or the source port;

S23: Perform packet forwarding between the source ONU and the destination ONU when the destination ONU and the source ONU are included in the ONU set of the proxy node.

As another judging branch of the process, when the target ONU and the source ONU are not included in the ONU set of the proxy node, the method further includes: S24, discarding the service forwarding message.

Optionally, after performing the packet forwarding between the S235 source ONU and the destination ONU, the method may further include: S25, reporting the result of the packet forwarding to the SDN controller.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present embodiment can be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium (such as ROM/RAM, disk). The optical disc includes a number of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the methods of various embodiments of the present invention.

In this embodiment, a method for SDN management control running on a network architecture is also provided, including:

S311. The proxy node receives a control message that is sent by the SDN controller and controls the service of the ONU.

S321. The proxy node controls, according to the control message, a service of the ONU.

Or include:

S312. The proxy node receives a request message sent by the ONU to request a service from the SDN.

S322. The proxy node processes the service of the ONU according to the request message.

Optionally, the controlling, by the proxy node, the service of the ONU according to the control message includes: performing, by the proxy node, one of the following operations on one or more control information of the ONU: encapsulating, decapsulating, parsing And forward.

Optionally, the proxy node receives a control message that is sent by the SDN controller to control the service of the ONU, and the proxy node controls the service of the ONU according to the control message, including:

The proxy node receives a query instruction that is sent by the SDN controller according to the first period for querying the status of the ONU link;

Sending, by the proxy node, the query instruction to one or more of the ONUs according to the first period;

Receiving link information fed back by the one or more ONUs according to the query instruction, and determining whether the link information indicates that the ONU is normal;

When it is determined that the link information indicates that the ONU is normal, the link information is forwarded to the SDN controller according to a second period, where the second period is greater than the first period.

The proxy node receives the service forwarding message of the SDN controller, where the service forwarding message includes: a packet sending source port and a packet receiving destination port;

Determining, by the proxy node, whether the destination ONU corresponding to the destination port and/or the source ONU corresponding to the source port are included in the ONU set;

When the destination ONU and the source ONU are included in the ONU set of the proxy node, the packet forwarding between the source ONU and the destination ONU is performed.

In this embodiment, an apparatus for performing SDN management control on a network architecture, corresponding to the foregoing method for SDN management control, includes: a first processing module, configured to receive a service sent by an SDN controller for using an ONU Controlling the control message, and controlling the service of the ONU according to the control message; and/or, the second processing module is configured to receive a request message sent by the ONU for requesting a service from the SDN, and according to the The request message processes the service of the ONU.

Example 2

An optical line terminal OLT is also provided in this embodiment. The device is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

The embodiment also provides an optical line terminal OLT. FIG. 4 is a structural block diagram of an OLT according to an embodiment of the present invention. As shown in FIG. 4, the OLT includes:

The access module 40 is connected to one or more ONUs;

The interface module 42 is connected to the SDN controller;

The proxy module 44 is connected between the access module and the interface module, and is configured to manage and control one or more ONUs by the proxy SDN controller.

FIG. 5 is a block diagram of an optional structure of an OLT according to an embodiment of the present invention. As shown in FIG. 5, the OLT further includes: a management channel 50 is disposed between the proxy module and the SDN controller, where the management channel and the management IP and/or The port number corresponds. Avoid establishing a management channel between the SDN controller and each ONU, thus causing management resources.

Example 3

This embodiment provides an implementation architecture and apparatus of an access system. The access system acts as an agent of the SDN controller and listens for message interactions between the SDN controller and the access system. After the proxy function is implemented for the configuration management message, the access system processes the message from the ONU or the SDN controller, and sends only the necessary packets to the SDN controller and the ONU to improve the processing efficiency of the SDN controller from the configuration management level. , saving bandwidth resources of the SDN controller.

In addition, after the access system implements the proxy (proxy server) function, the SDN controller only needs to establish a management channel with the access system to avoid establishing a management channel between the SDN controller and each ONU, thereby causing management resources (such as IP). Insufficient resources such as address, port number, etc.

At the control level, the access system performs network topology discovery through the Proxy module, and then performs The control of the forwarding plane and the forwarding of packets can optimize the SDN controller to a certain extent and improve the processing efficiency.

The following description will be made in conjunction with specific embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

The first embodiment applies the patent to solve the problem that the SDN controller directly manages the insufficient management resources of the multi-terminal in the access system and the inefficiency.

FIG. 6 is a schematic diagram of an SDN controller directly managing multiple ONUs connected by an OLT according to the related art of the present invention, as shown in FIG. 6. In the scenario of applying SDN, only the service forwarding plane exists in the access node OLT. After the ONU registration authentication is completed in the PON MAC, the control and management of the ONU is directly performed by the SDN controller. Therefore, for each ONU, a management channel needs to be established between the SDN controller and the ONU, that is, a management IP address or port number is required. Usually, the number of ONUs directly connected by one OLT can reach thousands. An OLT controller can have multiple OLTs connected. As a result, the SDN controller directly controls the number of ONUs that are managed, that is, the required management resources, such as IP addresses. As users increase, they may face a shortage of management IP addresses.

7 is a functional architecture diagram of an SDN controller and an access node in an SDN scenario according to Embodiment 3 of the present invention. As shown in FIG. 7, the architecture of the access node shown in FIG. 2 is adopted, and the OLT functions as an SDN controller to manage the ONU. Proxy (proxy), an SDN controller only needs to establish a management channel with the OLT connecting multiple ONUs, that is, only one management IP or port number is needed for one OLT, which greatly saves the utilization of the management IP address.

8 is a schematic diagram of an access node being a GPON (Gigabit-Capable PON) according to Embodiment 3 of the present invention. As shown in FIG. 8, the OLT generally supports a PON interface of a type such as GPON/10GPON/NG-PON2, for these types of ONU, the management of the OLT is managed by the physical layer PLOAM/ONU Management and Control Interface (OMCI); FIG. 9 is an EPON (Ethernet PON) of the access node according to Embodiment 3 of the present invention. The schematic diagram, as shown in Figure 9, when the OLT supports interfaces such as EPON/10GEPON, the OLT passes OAM (Operation Administration and Maintenance)/Extension OAM for management. When the OLT acts as the SDN controller to manage the ONU's proxy, the OLT generally establishes a management channel with the SDN controller through protocols such as OF-CONFIG/OVSBD/Openflow or Netconf, and the control information between the SDN controller and the ONU passes through the OLT proxy. .

For the management of the ONU, the OLT is configured as a proxy to complete the encapsulation, decapsulation, parsing, and forwarding of the control information of the ONU and the SDN controller. The OLT uses an IP address, and the OLT encapsulates the control information of the received ONU, such as OMCI. The message is placed in a management data frame based on the OF-CONFIG/OPENflow or Netconf protocol, where the encapsulation header includes an IP address and an identifier for identifying the ONU, such as an ONU-ID or an IP address, a port number connected under the OLT. After the ONU is online, it sends information such as registration and authentication. The OLT encapsulates the relevant information and sends it to the SDN controller. The SDN controller also performs corresponding encapsulation on the control information of the ONU. After receiving the OLT, the OLT decapsulates and analyzes the OLT to send it to the corresponding ONU.

FIG. 10 is a schematic diagram of an access node managing multiple physical CPEs as a proxy according to Embodiment 3 of the present invention. As shown in FIG. 10, the architecture and method of this embodiment are adopted. The proxy module in the access node acts as a proxy for the SDN controller to control and manage the CPE. The access node indirectly manages multiple CPEs, and the SDN controller establishes a Layer 2 channel with the access node, and achieves the purpose of managing and controlling multiple physical CPEs through only one vCPE module, which is simple, efficient, and economical. Resources. The access node and each CPE establish an IP management channel or other type of management channel depending on the type of CPE.

Embodiment 2: Applying the method provided in this patent to save bandwidth of the SDN controller and improve processing efficiency;

After the authentication registration process is completed between the ONU and the access node PON MAC and the corresponding status of the SDN controller is reported, the SDN controller needs to periodically maintain the link status of each ONU, so that the link information of the ONU needs to be queried periodically. The PON MAC layer of the OLT needs to periodically query the link status of the ONU, and the ONU also periodically reports its related information. If the ONU does not pass the proxy module of the OLT, the ONU reports its link information every time, and the OLT reports it to the SDN control in real time. Device. If the reporting frequency is high, the bandwidth of the SDN control is wasted, and the processing efficiency of the SDN controller is reduced.

11 is an interaction diagram of an access node proxy SDN controller performing a query according to Embodiment 3 of the present invention. As shown in FIG. 11, if the OLT configures the proxy module to intercept the related state information reported by the ONU and reduces the reporting frequency, Will greatly reduce the bandwidth of the SDN controller and improve processing efficiency

The specific implementation steps are as shown in FIG. 11 and include:

S1001: The SDN controller sends a command to query the ONU link status periodically (every 5 seconds);

S1002: The OLT obtains the related query command, and queries the link state of each ONU every 5 seconds.

S1003: The ONU reports the link information of the OLT every 5 seconds. The OLT management configuration agent module processes the report according to the report information of each ONU. If the link state is normal, the switch is selected to report the connection every 10 seconds or 15 seconds. Link status information of the ONU.

In a third embodiment, the proxy proxy function of the access node OLT implements topology discovery at the control level to complete the forwarding function of the internal node of the access system.

FIG. 12 is a schematic diagram of the Proxy proxy module implementing control plane topology discovery and forwarding according to Embodiment 3 of the present invention. As shown in FIG. 12, the proxy module of the access node receives the related service forwarding message from the SDN controller as shown in FIG. , including the source and destination ports of the packet. The proxy module of the access node performs internal addressing according to the relevant control message. If the source port and the destination port are both the access node, the proxy module completes the packet forwarding between the source port and the destination port, and reports the forwarding result. To the SDN controller; if the result of the proxy module addressing finds that the source port and the destination port do not belong to or belong to the access node at the same time, no processing is performed on the message.

Through the method provided by the embodiment, the access node (OLT) establishes a management channel between the proxy module and the SDN controller, thereby saving the management resources of the SDN controller; meanwhile, at the configuration management level, the proxy module of the OLT listens to the SDN. Message interaction between the controller and the OLT, and processing related messages to avoid SDN controllers and ONUs or other types of CPEs A waste of resources in the peer-to-peer management mode. To form a point-to-point between the SDN controller and the OLT and a point-to-multipoint management mode between the OLT and the ONU or other types of CPE, the management function of the SDN controller is simplified, and the SDN controller maintenance update ONU or other is greatly saved. The processing resources of the CPE-related information save the bandwidth of the SDN controller and improve the processing efficiency. At the control level, the access system performs network topology discovery through the Proxy module, and then performs forwarding plane control and packet forwarding. To some extent, the SDN controller can be optimized to improve processing efficiency.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

Obviously, those skilled in the art should understand that the above modules or steps of the present embodiment can be implemented by a general computing device, which can be concentrated on a single computing device or distributed among multiple computing devices. On the network, optionally, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from The steps shown or described are performed sequentially, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

As described above, the method, device, and system for SDN management control provided by this embodiment have the following beneficial effects: since a proxy node is added between the SDN controller and the ONU, the SDN is managed and controlled by the proxy node. The interaction between the controller and the ONU avoids the one-to-one control between the SDN controller and the ONU. Therefore, the problem of low efficiency of the SDN controller service processing in the related art and waste of bandwidth resources can be solved, and the entire SDN control can be improved. Control efficiency, save bandwidth resources, and improve resource utilization.

Claims

A system for SDN management control, comprising:

a software-defined network SDN controller configured to control and/or manage optical network equipment ONUs and optical line terminals OLTs within the network under its jurisdiction;

And a proxy node, connected between the SDN controller and the ONU, configured to proxy the SDN controller to manage and/or control the OLT and one or more of the ONUs.
The system of claim 1 wherein a management channel is established between the proxy node and the SDN controller, wherein the management channel corresponds to a management IP and/or port number.
The system of claim 1 wherein said proxy node interacts with said SDN controller via one of the following protocols: OF-CONFIG, OVSBD, Openflow, Netconf.
The system of claim 1 wherein said proxy node proxying said SDN controller to manage one or more of said ONUs comprises:

The proxy node proxyes the SDN controller to perform one of the following operations on control information of one or more of the ONUs: encapsulation, decapsulation, parsing, and forwarding.
The system of claim 1 wherein said proxy node proxying said SDN controller to control one or more of said ONUs comprises:

The proxy node receives a query instruction that is sent by the SDN controller according to the first period for querying the status of the ONU link;

Sending, by the proxy node, the query instruction to one or more of the ONUs according to the first period;

Receiving link information fed back by the one or more ONUs according to the query instruction, and determining whether the link information indicates that the ONU is normal;

When it is determined that the link information indicates that the ONU is normal, forwarding the link information to the SDN controller according to a second period, where the second period is greater than the first cycle.
The system according to claim 5, wherein, when it is determined that the link information indicates that the ONU is abnormal, the link information is forwarded to the SDN controller according to a third period, wherein the third The period is less than or equal to the first period.
The system of claim 1 wherein said proxy node proxying said SDN controller to control one or more of said ONUs comprises:

The proxy node receives the service forwarding message of the SDN controller, where the service forwarding message includes: a packet sending source port and a packet receiving destination port;

Determining whether the target ONU corresponding to the destination port and/or the source ONU corresponding to the source port are included in the ONU set under the proxy node;

When the destination ONU and the source ONU are included in the ONU set of the proxy node, the packet forwarding between the source ONU and the destination ONU is performed.
The system of claim 7, wherein the service forwarding message is discarded when the destination ONU and the source ONU are not included in the ONU set under the proxy node.
The system of claim 7, wherein after performing the packet forwarding between the source ONU and the destination ONU, the method further includes:

And reporting the result of the packet forwarding to the SDN controller.
The system of any of claims 1 to 9, wherein the proxy node is located on the OLT, wherein one or more of the ONUs are accessed by the OLT to the SDN controller.
An optical line terminal OLT, the OLT further comprising:

An access module, connected to one or more ONUs;

An interface module, connected to the SDN controller;

And a proxy node, connected between the access module and the interface module, configured to proxy the SDN controller to manage and control one or more of the ONUs.
The OLT according to claim 11, wherein a management channel is provided between the proxy node and the SDN controller, wherein the management channel corresponds to a management IP and/or a port number.
A method for SDN management control, comprising:

The proxy node receives a control message sent by the SDN controller for controlling the service of the ONU; the proxy node controls the service of the ONU according to the control message; and/or,

The proxy node receives the request message sent by the ONU for requesting the service from the SDN; the proxy node processes the service of the ONU according to the request message.
The method according to claim 13, wherein the controlling, by the proxy node, the service of the ONU according to the control message comprises: the proxy node performing one of the following operations on control information of one or more of the ONUs : Encapsulation, decapsulation, parsing, and forwarding.
The method according to claim 13, wherein the proxy node receives a control message sent by the SDN controller for controlling the service of the ONU, and the proxy node controls the service of the ONU according to the control message, including :

The proxy node receives a query instruction that is sent by the SDN controller according to the first period for querying the status of the ONU link;

Sending, by the proxy node, the query instruction to one or more of the ONUs according to the first period;

Receiving link information fed back by the one or more ONUs according to the query instruction, and determining whether the link information indicates that the ONU is normal;

When it is determined that the link information indicates that the ONU is normal, forwarding the link information to the SDN controller according to a second period, where the second period is greater than the first cycle.
The method according to claim 13, wherein the proxy node receives a control message sent by the SDN controller for controlling the service of the ONU, and the proxy node controls the service of the ONU according to the control message, including :

The proxy node receives the service forwarding message of the SDN controller, where the service forwarding message includes: a packet sending source port and a packet receiving destination port;

Determining, by the proxy node, whether the destination ONU corresponding to the destination port and/or the source ONU corresponding to the source port are included in the ONU set;

When the destination ONU and the source ONU are included in the ONU set of the proxy node, the packet forwarding between the source ONU and the destination ONU is performed.
A device for SDN management control, comprising:

The first processing module is configured to receive a control message sent by the SDN controller for controlling the service of the ONU, and control the service of the ONU according to the control message; and/or,

The second processing module is configured to receive a request message sent by the ONU for requesting a service from the SDN, and process the service of the ONU according to the request message.