CN107360105B

CN107360105B - SDN management control method, device and system and OLT

Info

Publication number: CN107360105B
Application number: CN201610303518.1A
Authority: CN
Inventors: 臧美燕; 李明生; 袁立权; 刁渊炯; 李玉峰
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-05-10
Filing date: 2016-05-10
Publication date: 2021-07-27
Anticipated expiration: 2036-05-10
Also published as: WO2017193815A1; CN107360105A

Abstract

The invention provides a method, a device and a system for SDN management control and an OLT, wherein the system comprises: the SDN controller is used for controlling and/or managing optical network equipment ONU and an optical line terminal OLT in a network under the jurisdiction; and the proxy node is connected between the SDN controller and the ONU and is used for proxying the SDN controller to manage and/or control the OLT and one or more ONUs. The invention solves the problems of low service processing efficiency and bandwidth resource waste of the SDN controller in the related technology.

Description

SDN management control method, device and system and OLT

Technical Field

The invention relates to the field of communication, in particular to a method, a device and a system for SDN management control and an OLT.

Background

At present, the global internet explosive development formed by various intelligent terminal devices, various cloud services APP, huge optical fiber networks and wireless communication networks greatly stimulates the increasing diversification and complication of network services. Meanwhile, with the increasing demand of users for comprehensive service communication and the emergence of customized and differentiated demands, the data forwarding plane of the optical network develops towards the direction of ultra-long distance, ultra-large capacity and ultra-high speed, and the control management plane develops towards the direction of intelligence, flexibility, software definition, user interaction, safety, reliability, high efficiency and energy conservation. The openness and low cost become core targets for future network development. Meanwhile, with The rise of manufacturers of internet ott (over The top), traditional network operators are gradually "pipelined", and face The dilemma of "poor scissors". The access network is used as the first portal for accessing the internet by the user, is the core of the user network experience, and is a link for contacting the service with the user. With the revolution of internet service driven network architecture, people put forward new requirements on optical access networks, and need to further have the characteristics of intelligence, openness, service and the like, while the traditional access network architecture and technology are difficult to meet the requirements.

The quality of service of the access network is directly related to the vital interests of the telecommunications operator and the user. How to realize the quick access of users, quick fault location and recovery, convenient and quick configuration of user terminals, improvement of user experience, control of operation cost and improvement of network profitability become the problems to be solved urgently by the access network. The traditional access network basically adopts a manual mode for management, such as account opening, service handling, fault handling and the like of a user, and the management mode needs a large amount of manpower and material resources, so that the operation cost of the access network is high, and the user experience is poor. In addition, the existing Customer Premise Equipment (CPE) cannot support flexible service upgrade, which results in slow development of fixed network operation service.

Software Defined Network (SDN) is a novel Network architecture, and aims to separate control and forwarding of a Network and implement programmable control on underlying devices, thereby achieving the goal of Network opening and flexible configuration. The SDN breaks through a closed and rigid control system formed by a traditional dependent special network element from the aspect of architecture, provides a new idea for the development of an access network, such as separation of control and forwarding, centralized control and the like, so that the optical access network equipment gradually has an intelligent control function, provides integrated service capability, simplifies operation and improves the efficiency of network operation and maintenance.

In the related art, fig. 1 is a schematic diagram of managing CPEs in a point-to-point manner in the related art, and as shown in fig. 1, management of CPEs by an SDN controller is to establish point-to-point connections between multiple vcpes and multiple CPEs in the controller and to control and manage the CPEs point-to-point, in this case, higher requirements are placed on processing capacity and resource utilization of the SDN controller.

However, after the access Network system implements centralized control by applying the SDN architecture due to its inherent architecture characteristics (point-to-multipoint), as shown in fig. 1, theoretically, the SDN controller may directly control the top ten thousand Optical Network devices (Optical Network units, abbreviated as ONUs) connected to an Optical Line Terminal (OLT). The CPE belongs to an ONU, and in practical applications, problems may occur in processing efficiency, common resource utilization, and bandwidth utilization of the SDN controller.

In view of the above problems in the related art, no effective solution has been found so far.

Disclosure of Invention

The embodiment of the invention provides a method, a device and a system for SDN management control and an OLT (optical line terminal), which are used for at least solving the problems of low service processing efficiency and bandwidth resource waste of an SDN controller in the related technology.

According to an embodiment of the present invention, there is provided a system for SDN management control, including: the SDN controller is used for controlling and/or managing optical network equipment ONU and an optical line terminal OLT in a network under the jurisdiction; and the proxy node is connected between the SDN controller and the ONU and is used for proxying the SDN controller to manage and/or control the OLT and one or more ONUs.

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

Optionally, the proxy node interacts 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 the one or more ONUs includes: the proxy node acting on the SDN controller to perform one of the following operations on control information of one or more of the ONUs: and (5) encapsulating, decapsulating, resolving and forwarding.

Optionally, the proxying the SDN controller to control the one or more ONUs by the proxy node includes: the agent node receives a query instruction which is issued by the SDN controller according to a first period and used for querying the ONU link state; the agent node sends the inquiry instruction to one or more ONU according to the first period; receiving link information fed back by one or more ONUs according to the query instruction, and judging whether the link information represents that the ONUs are normal or not; and when the link information is judged to represent that the ONU is normal, forwarding the link information to the SDN controller according to a second period, wherein the second period is greater than the first period.

Optionally, when it is determined that the link information represents that the ONU is not normal, 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 period.

Optionally, the proxying the SDN controller to control the one or more ONUs by the proxy node includes: the proxy node receives a service forwarding message of the SDN controller, wherein the service forwarding message comprises: a message sending source port and a message receiving destination port; judging whether an ONU set governed by the agent node comprises a target ONU corresponding to the target port and/or a source ONU corresponding to the source port; and when the ONU set governed by the agent node comprises the target ONU and the source ONU, executing message forwarding between the source ONU and the target ONU.

Optionally, when the ONU set governed by the proxy node does not include the destination ONU and the source ONU, the service forwarding message is discarded from being processed.

Optionally, after the message forwarding between the source ONU and the destination ONU is completed, the method further includes: and reporting the message forwarding result to the SDN controller.

Optionally, the proxy node is disposed on the OLT, wherein one or more of the ONUs access the SDN controller through the OLT.

According to another embodiment of the present invention, there is provided an optical line terminal OLT, further including: the access module is connected with one or more ONUs; an interface module connected with the SDN controller; and the proxy node is connected between the access module and the interface module and is used for acting the SDN controller to manage and control one or more ONUs.

Optionally, 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.

According to another embodiment of the present invention, a method for SDN management control is provided, including: the method comprises the steps that a proxy node receives a control message which is sent by an SDN controller and used for controlling the service of an ONU; the proxy node controls the service of the ONU according to the control message; and/or the agent node receives a request message which is sent by the ONU and used for requesting service to 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 includes: the proxy node performs one of the following operations on control information of one or more of the ONUs: and (5) encapsulating, decapsulating, resolving and forwarding.

Optionally, the receiving, by a proxy node, a control message sent by an SDN controller and used for controlling a service of an ONU, where the controlling, by the proxy node, the service of the ONU according to the control message includes: the agent node receives a query instruction which is issued by the SDN controller according to a first period and used for querying the ONU link state; the agent node sends the inquiry instruction to one or more ONU according to the first period; receiving link information fed back by one or more ONUs according to the query instruction, and judging whether the link information represents that the ONUs are normal or not; and when the link information is judged to represent that the ONU is normal, forwarding the link information to the SDN controller according to a second period, wherein the second period is greater than the first period.

Optionally, the receiving, by a proxy node, a control message sent by an SDN controller and used for controlling a service of an ONU, where the controlling, by the proxy node, the service of the ONU according to the control message includes: the proxy node receives a service forwarding message of the SDN controller, wherein the service forwarding message comprises: a message sending source port and a message receiving destination port; the agent node judges whether the managed ONU set comprises a target ONU corresponding to the target port and/or a source ONU corresponding to the source port; and when the ONU set governed by the agent node comprises the target ONU and the source ONU, executing message forwarding between the source ONU and the target ONU.

According to another embodiment of the present invention, an apparatus for SDN management control is provided, including: the system comprises a first processing module, a second processing module and a service management module, wherein the first processing module is used for receiving a control message which is sent by an SDN controller and used for controlling the service of the ONU and controlling the service of the ONU according to the control message; and/or the second processing module is used for receiving a request message which is sent by the ONU and used for requesting the SDN for service, and processing the service of the ONU according to the request message

According to the invention, the SDN controller is used for controlling and managing the optical network equipment 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 and used for acting the SDN controller to manage and control the OLT and one or more ONUs.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a schematic diagram of a point-to-point manner in the related art for managing a CPE;

FIG. 2 is a diagram of a network architecture according to an embodiment of the present invention;

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

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

fig. 5 is a block diagram of an alternative architecture of an OLT according to an embodiment of the present invention;

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

fig. 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;

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

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

fig. 10 is a schematic diagram of an access node as a proxy for managing a plurality of physical CPEs according to embodiment 3 of the present invention;

fig. 11 is an interaction diagram of an access node proxy SDN controller for querying according to embodiment 3 of the present invention;

fig. 12 is a schematic diagram of the Proxy module implementing control plane topology discovery and forwarding according to embodiment 3 of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Example 1

The embodiment of the present application can operate on the network architecture shown in fig. 2, where fig. 2 is a network architecture diagram according to an embodiment of the present invention, and as shown in fig. 2, the network architecture includes: the access network system comprises an access network (OLT), an SDN and an ONU, wherein the access network is used as an intermediate network of the SDN and the ONU, the access network further comprises a switching chip, a PON (passive optical network) MAC (media access control), the SDN further comprises an SDN controller and a configuration controller, and the access network and the SDN interact through an open flow or net conf network switching model.

In this embodiment, a system for SDN management control running in a network architecture is provided, and fig. 3 is a system structure 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 an optical network unit ONU and an optical line terminal OLT in a network under the jurisdiction;

and the proxy node 32 is connected between the SDN controller and the ONU and is used for managing and controlling the OLT and the ONU or the ONUs by the proxy SDN controller.

According to the system, the SDN controller is defined by software and used for controlling and managing the optical network equipment ONU and the optical line terminal OLT in the network under jurisdiction, and the proxy node is connected between the SDN controller and the ONU and used for managing and controlling the OLT and one or more ONUs by the proxy SDN controller.

Alternatively, the proxy node 32 may be provided on a 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 optional implementation manner according to this embodiment, a management channel is established between the proxy node and the SDN controller, wherein the management channel corresponds to a management IP and/or a port number. Therefore, the situation that management resources (such as management IP addresses and port numbers) are insufficient due to the fact that a management channel is established between the SDN controller and each ONU can be avoided. There are many protocols for the agent node to exchange information with the SDN controller, which are exemplified here: OF-CONFIG, OVSBD, Openflow, Netconf.

And the proxy node is responsible for interaction between the SDN controller and the ONU and manages and controls the ONU. Including a variety of situations and scenarios, as described in more detail below:

the proxy node acting the SDN controller to manage the one or more ONUs comprises the following steps: the agent node performs one of the following operations on the control information of the SDN controller on the one or more ONUs: and (5) encapsulating, decapsulating, resolving and forwarding.

The method comprises the following steps that an agent node agent SDN controller controls one or more ONUs, and an interaction process comprises the following steps:

s11, the proxy node receives a query instruction which is issued by the SDN controller according to a first period and used for querying the ONU link state;

s12, the agent node sends a query instruction to one or more ONUs according to a first period;

s13, receiving link information fed back by one or more ONUs according to the query instruction, and judging whether the link information represents that the ONUs are normal or not;

and S14, when the link information is judged to represent that the ONU is normal, forwarding the link information to the SDN controller according to a second period, wherein the second period is greater than the first period.

By reducing the forwarding frequency, the bandwidth of the SDN controller can be greatly reduced, the processing efficiency is improved, and meanwhile, the normal control of the SDN controller on the ONU cannot be influenced. In the above embodiment, after the authentication registration process is completed between the ONU and the PON MAC and the corresponding state of the SDN controller is reported, the SDN controller needs to maintain the link state of each ONU at regular time, so that the link information of the ONU needs to be queried at regular time.

Optionally, as another branch, when it is determined that the link information represents that the ONU is abnormal, the method further includes: and S15, forwarding the link information to the SDN controller according to a third period, wherein the third period is less than or equal to the first period. Here, the SDN controller may be helped to react quickly and control the ONU effectively.

In an optional implementation scenario according to this embodiment, a proxy node proxies an SDN controller to control one or more ONUs, and an interaction procedure includes:

s21, the proxy node receives a service forwarding message of the SDN controller, where the service forwarding message includes: a message sending source port and a message receiving destination port;

s22, judging whether the ONU set governed by the agent node includes a target ONU corresponding to the target port and/or a source ONU corresponding to the source port;

s23, when the ONU set controlled by the agent node comprises the target ONU and the source ONU, the message forwarding between the source ONU and the target ONU is executed.

As another judgment branch of the flow, when the ONU set governed by the agent node does not include the destination ONU and the source ONU, the method further includes: s24, abandoning the service forwarding message.

Optionally, after performing S23, completing forwarding the message between the source ONU and the destination ONU, the method may further include: and S25, reporting the message forwarding result to the SDN controller.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

In this embodiment, a method for SDN management control running in a network architecture is further provided, where the method includes:

s311, the proxy node receives a control message which is sent by the SDN controller and used for controlling the service of the ONU;

s321, the proxy node controls the service of the ONU according to the control message;

or comprises the following steps:

s312, the agent node receives a request message which is sent by the ONU and used for requesting service to the SDN;

s322, the proxy node processes the service of the ONU according to the request message.

Optionally, the receiving, by the proxy node, a control message sent by the SDN controller and used for controlling a service of the ONU, and the controlling, by the proxy node, the service of the ONU according to the control message includes:

the agent node receives a query instruction which is issued by the SDN controller according to a first period and used for querying the ONU link state;

the agent node sends the inquiry instruction to one or more ONU according to the first period;

receiving link information fed back by one or more ONUs according to the query instruction, and judging whether the link information represents that the ONUs are normal or not;

and when the link information is judged to represent that the ONU is normal, forwarding the link information to the SDN controller according to a second period, wherein the second period is greater than the first period.

the proxy node receives a service forwarding message of the SDN controller, wherein the service forwarding message comprises: a message sending source port and a message receiving destination port;

the agent node judges whether the managed ONU set comprises a target ONU corresponding to the target port and/or a source ONU corresponding to the source port;

and when the ONU set governed by the agent node comprises the target ONU and the source ONU, executing message forwarding between the source ONU and the target ONU.

In this embodiment, an apparatus for SDN management control running in a network architecture is provided, where the method for SDN management control includes: the system comprises a first processing module, a second processing module and a service management module, wherein the first processing module is used for receiving a control message which is sent by an SDN controller and used for controlling the service of the ONU and controlling the service of the ONU according to the control message; and/or the second processing module is used for receiving a request message which is sent by the ONU and used for requesting service to the SDN, and processing the service of the ONU according to the request message.

Example 2

In this embodiment, an optical line terminal OLT is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, which have already been described and are not described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

This embodiment further provides an optical line terminal OLT, and fig. 4 is a block diagram of a structure of the OLT according to an embodiment of the present invention, as shown in fig. 4, the OLT includes:

an access module 40 connected with one or more ONUs;

an interface module 42 connected to the SDN controller;

and the proxy module 44 is connected between the access module and the interface module and is used for managing and controlling one or more ONUs by the proxy SDN controller.

Fig. 5 is a block diagram of an alternative structure of an OLT according to an embodiment of the present invention, and as shown in fig. 5, the OLT includes: a management channel 50 is provided between the agent module and the SDN controller, wherein the management channel corresponds to a management IP and/or a port number. The management channel is prevented from being established between the SDN controller and each ONU, and therefore management resources are avoided.

Example 3

The embodiment provides an implementation architecture and a device of an access system. The access system is used as an agent of the SDN controller and monitors message interaction between the SDN controller and the access system. After the agent function is realized for the configuration management message, the access system only sends necessary messages to the SDN controller and the ONU after processing the message from the ONU or the SDN controller, the processing efficiency of the SDN controller is improved from the configuration management layer, and the bandwidth resource of the SDN controller is saved.

In addition, after the access system realizes proxy functions, the SDN controller only needs to establish a management channel with the access system, and thus, the situation that management resources (such as resources like IP addresses and port numbers) are insufficient due to the fact that the management channel is established between the SDN controller and each ONU is avoided.

In the control layer, the access system discovers network topology through the Proxy module, and then controls the forwarding plane and forwards messages, so that the SDN controller can be optimized to a certain extent, and the processing efficiency is improved.

The following description will be given with reference to specific examples. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In a specific embodiment, the first application of the patent solves the problems of insufficient multi-terminal management resources and low efficiency in an SDN controller direct management access system.

Fig. 6 is a schematic diagram of an SDN controller directly managing a plurality of ONUs connected to an OLT according to a related art of the present invention, as shown in fig. 6. In a scene of applying the SDN, only a service forwarding plane is stored in an access node OLT, and after the registration authentication of the ONU is completed in a PON MAC, the control and management of the ONU are directly carried out by an 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 needed. Typically, the number of ONUs directly connected to one OLT may reach thousands. And one SDN controller may connect to multiple OLTs. Therefore, the ONU directly controlled and managed by the SDN controller can reach tens of thousands, that is, the required management resources, such as IP addresses, are very many. As users increase, there may be situations where insufficient IP addresses are managed.

Fig. 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, when an architecture of an access node shown in fig. 2 is used, an OLT serves as a proxy (agent) for managing ONUs by the SDN controller, and an SDN controller only needs to establish a management channel with the OLT connected to multiple ONUs, that is, only one management IP or port number is needed for one OLT, which greatly saves the use of management IP addresses.

Fig. 8 is a schematic diagram of an access node being a GPON (Gigabit-Capable PON) according to embodiment 3 of the present invention, and as shown in fig. 8, an OLT generally supports PON interfaces of types such as GPON/10GPON/NG-PON2, and for these types of ONUs, Management of the OLT is performed through a physical layer PLOAM/ONU Management and Control Interface (ONU Management and Control Interface, abbreviated as OMCI); fig. 9 is a schematic diagram of an access node being an EPON (ethernet pon) according to embodiment 3 of the present invention, and as shown in fig. 9, when the OLT supports interfaces such as an EPON/10GEPON, the OLT performs management through OAM (operation Administration and maintenance)/extended OAM. When the OLT serves as a proxy for managing the ONUs by the SDN controller, the OLT generally establishes a management channel with the SDN controller through an OF-CONFIG/OVSBD/Openflow or Netconf protocol, and control information between the SDN controller and the ONUs passes through the OLT proxy.

For management OF the ONUs, configuring the OLT as a Proxy to complete encapsulation, decapsulation, analysis and forwarding OF control information OF the ONUs and the SDN controller, where the OLT uses an IP address, the OLT encapsulates the received control information OF the ONUs, such as placing an OMCI message into a management data frame based on an OF-CONFIG/OPENflow or Netconf protocol, where an encapsulation header includes the IP address and an identifier for identifying the ONU, such as an ONU-ID or a port number OF the IP address, and after an ONU connected below the OLT is online, information such as registration and authentication is sent, and the OLT encapsulates relevant information and sends the encapsulated relevant information to the SDN controller. And the SDN controller also correspondingly encapsulates the control information of the ONU, and the OLT de-encapsulates the control information after receiving the control information, analyzes the control information and sends the control information to the corresponding ONU.

Fig. 10 is a schematic diagram of an access node as proxy to manage multiple physical CPEs according to embodiment 3 of the present invention, as shown in fig. 10, and the architecture and method of this embodiment are adopted. A proxy module in the access node acts as a proxy for the SDN controller to control and manage the CPE. The SDN controller achieves the purpose of managing and controlling a plurality of physical CPE through only one vCPE module by establishing a two-layer channel with the access node, and is simple, efficient and capable of saving management resources. And an IP management channel or other types of management channels are established between the access node and each CPE according to the type of the CPE.

In a second specific embodiment, the method provided by the patent is applied to save the bandwidth of the SDN controller and improve the processing efficiency;

after the authentication registration process is completed between the ONU and the PON MAC and the corresponding state of the SDN controller is reported, the SDN controller needs to maintain the link state of each ONU at regular time, so that the link information of the ONU needs to be inquired at regular time. The PON MAC layer of the OLT needs to periodically query the link status of the ONU, and the ONU also reports its related information at regular time. If the ONU reports the link information of the ONU each time without passing through the proxy module of the OLT, the OLT reports the link information to the SDN controller in real time. If the reporting frequency is high, the bandwidth of the SDN control is wasted, and the processing efficiency of the SDN controller is reduced.

Fig. 11 is an interaction diagram of an access node agent SDN controller querying according to embodiment 3 of the present invention, and as shown in fig. 11, if an OLT intercepts relevant state information reported by an ONU through a management configuration agent module of the OLT, and reduces a reporting frequency, bandwidth of the SDN controller is greatly reduced, and processing efficiency is improved

The specific implementation steps are shown in fig. 11, and include:

s1001, the SDN controller sends a command for inquiring the ONU link state at regular time (every 5 seconds);

s1002, the OLT acquires a related query command and simultaneously queries the link state of each ONU every 5 seconds;

and S1003, the ONU reports the link information of the OLT every 5 seconds, the OLT management configuration agent module processes the link information according to the reported information of each ONU, and if the link state is normal, the ONU is selected to report the link state information of the connected ONU every 10 seconds or 15 seconds.

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

Fig. 12 is a schematic diagram illustrating a Proxy module according to embodiment 3 of the present invention for implementing control plane topology discovery and forwarding, and as shown in fig. 12, a Proxy module of an access node as shown in fig. 12 receives a relevant service forwarding message from an SDN controller, where the relevant service forwarding message includes a packet sending source port and a destination port. The proxy module of the access node carries out internal addressing according to the related control message, if the source port and the destination port belong to the access node, the proxy module completes message 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 the access node or do not belong to the access node at the same time, no processing is performed on the message.

By the method provided by the embodiment, a management channel is established between the agent module and the SDN controller in the access node (OLT), so that the management resource of the SDN controller is saved; meanwhile, in a configuration management layer, an agent module of the OLT monitors message interaction between the SDN controller and the OLT and processes related messages, so that resource waste of a point-to-point management mode between the SDN controller and the ONU or other types of CPE is avoided. The point-to-point management mode between the SDN controller and the OLT and the point-to-multipoint management mode between the OLT and the ONU or other types of CPE are formed, the management function of the SDN controller is simplified, the processing resources for maintaining and updating the related information of the ONU or other types of CPE by the SDN controller are greatly saved, the bandwidth of the SDN controller is saved, and the processing efficiency is improved. In the control layer, the access system discovers network topology through the Proxy module, and then controls the forwarding plane and forwards messages, so that the SDN controller can be optimized to a certain extent, and the processing efficiency is improved.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A system for SDN management control, comprising:

the SDN controller is used for controlling and/or managing optical network equipment ONU and an optical line terminal OLT in a network under the jurisdiction;

a proxy node connected between the SDN controller and the ONU and used for acting the SDN controller to manage and/or control the OLT and one or more ONUs; the proxy node acting the SDN controller to control one or more of the ONUs comprises:

2. 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 a port number.

3. The system of claim 1, wherein the proxy node interacts information with the SDN controller via one of the following protocols: OF-CONFIG, OVSBD, Openflow, Netconf.

4. The system of claim 1, wherein the proxy node proxying the SDN controller to manage the one or more ONUs comprises:

the proxy node acting on the SDN controller to perform one of the following operations on control information of one or more of the ONUs: and (5) encapsulating, decapsulating, resolving and forwarding.

5. The system of claim 4, wherein when the link information is determined to indicate that the ONU is not normal, the link information is forwarded to the SDN controller according to a third period, wherein the third period is less than or equal to the first period.

6. The system of claim 1, wherein the proxy node proxying the SDN controller to control one or more of the ONUs comprises:

judging whether an ONU set governed by the agent node comprises a target ONU corresponding to the target port and/or a source ONU corresponding to the source port;

7. The system according to claim 6, wherein processing said traffic forwarding message is aborted when said destination ONU and said source ONU are not included in the set of ONUs governed by said proxy node.

8. The system according to claim 6, further comprising, after performing packet forwarding between the source ONU and the destination ONU:

and reporting the message forwarding result to the SDN controller.

9. The system of any of claims 1 to 8, wherein the proxy node is disposed on the OLT, and wherein one or more of the ONUs are accessible to the SDN controller via the OLT.

10. An optical line terminal, OLT, characterized in that the OLT further comprises:

the access module is connected with one or more ONUs;

an interface module connected with the SDN controller;

the agent node is connected between the access module and the interface module and is used for acting the SDN controller to manage and control one or more ONUs; the proxying the SDN controller to manage and control the one or more ONUs comprises:

11. The OLT of claim 10, wherein a management channel is disposed between the proxy node and the SDN controller, wherein the management channel corresponds to a management IP and/or port number.

12. A method for SDN management control, comprising:

the method comprises the steps that a proxy node receives a control message which is sent by an SDN controller and used for controlling the service of an ONU; the proxy node controls the service of the ONU according to the control message; the controlling, by the proxy node, the ONU according to the SDN controller comprises: the agent node receives a query instruction which is issued by the SDN controller according to a first period and used for querying the ONU link state; the agent node sends the inquiry instruction to the ONU according to the first period; receiving link information fed back by the ONU according to the query instruction, and judging whether the link information represents that the ONU is normal or not; and when the link information is judged to represent that the ONU is normal, forwarding the link information to the SDN controller according to a second period, wherein the second period is greater than the first period.

13. The method of claim 12, wherein the proxy node controlling the traffic of the ONU according to the control message comprises: the proxy node performs one of the following operations on control information of one or more of the ONUs: and (5) encapsulating, decapsulating, resolving and forwarding.

14. The method of claim 12, wherein a proxy node receives a control message sent by an SDN controller for controlling the traffic of an ONU, and wherein the proxy node controls the traffic of the ONU according to the control message, comprising:

15. An apparatus for SDN management control, comprising:

the system comprises a first processing module, a second processing module and a service management module, wherein the first processing module is used for receiving a control message which is sent by an SDN controller and used for controlling the service of the ONU and controlling the service of the ONU according to the control message; the controlling the ONU according to the SDN controller comprises: receiving a query instruction which is issued by the SDN controller according to a first period and used for querying the ONU link state; sending the query instruction to the ONU according to the first period; receiving link information fed back by the ONU according to the query instruction, and judging whether the link information represents that the ONU is normal or not; and when the link information is judged to represent that the ONU is normal, forwarding the link information to the SDN controller according to a second period, wherein the second period is greater than the first period.