Passive optical access network and flow scheduling method thereof

A technology for network access and traffic scheduling, which is applied in the field of optical fiber communication, can solve the problems of inability to control traffic and PON real-time control, and achieve the effects of improving low utilization of network resources, avoiding signaling storms, and saving costs

Inactive Publication Date: 2017-09-22
BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the network management can only monitor business information such as business overview, alarm, and performance, and cannot control PON in real time, let alone control traffic.

Method used

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  • Passive optical access network and flow scheduling method thereof
  • Passive optical access network and flow scheduling method thereof
  • Passive optical access network and flow scheduling method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] image 3 A flowchart showing a flow scheduling method for a passive optical access network provided by an embodiment of the present invention, as shown in figure 1 As shown, the method includes:

[0038] Step 301: the optical network unit ONU verifies the service request, and sends the service request to the corresponding optical line terminal node OF-OLT;

[0039] Step 302: The optical line terminal node OF-OLT reports the service request of the optical network unit ONU and its own real-time flow information to the OpenFlow controller;

[0040] Step 303: the OpenFlow controller aggregates the resource information of the entire network and real-time network status information, and allocates bandwidth according to a preset strategy.

[0041] In the present invention, when a service request arrives, the ONU verifies the service request and maps it to the request parameter TR i (d, t), submit an application to the corresponding OF-OLT through the OAM protocol, and each ...

Embodiment 2

[0044] Figure 4 A flowchart showing an implementation of step 303, such as Figure 4 As shown, step 303 can be implemented as the following steps:

[0045] Step 401: The OpenFlow controller according to the past t 0 OLT resource utilization expectation, OLT service queue length expectation, and service data volume expectation in the service request within a certain period of time, calculate the future time t 1 The bandwidth requirements of the internal network;

[0046] Step 402: The OpenFlow controller allocates bandwidth for the service request according to the principle of the lowest cost or the principle of the best user experience, and allocates the total uplink bandwidth of the optical line terminal node OLT.

[0047] Due to the time-varying nature of the network state, the present invention uses a dynamic resource prediction scheme to predict the current and future parameter changes by sampling resource changes in the past period of time. i.e. statistical past t 0...

Embodiment 3

[0051] Figure 5 A flow chart showing an implementation of step A2 in Embodiment 2, such as Figure 5 As shown, step A2 can be implemented as the following steps:

[0052] Step 501: When the available bandwidth of the optical line terminal node OLT is greater than the minimum required bandwidth of the network, allocate bandwidth to the service request according to the principle of the lowest cost or the principle of optimal user experience, and allocate bandwidth to the optical line terminal node OLT The total uplink bandwidth is allocated;

[0053] Optionally, the minimum cost principle includes: when the minimum required bandwidth of the network is met, reducing the total bandwidth of the OLT link of the idle optical line terminal node, increasing the total bandwidth of the OLT link of the busy optical line terminal node, and starting the sleep wake-up of the device mechanism.

[0054] The principle of the lowest cost is to allocate bandwidth according to the maximum dela...

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Abstract

The invention relates to a passive optical access network and a flow scheduling method thereof. The network comprises an OpenFlow controller, an optical line terminal node OF-OLT having an OpenFlow protocol proxy function, and an optical network unit ONU, wherein the OpenFlow controller is connected with the at least one optical line terminal node OF-OLT through a metropolitan area network; and the optical line terminal node OF-OLT is connected with at least one optical network unit ONU. According to the passive optical access network provided by the invention, resource scheduling is realized by the OF-OLT and the ONU, thereby reducing the cost and avoiding signaling storm. Meanwhile, bandwidth resource allocation and unified dynamic scheduling of users among a plurality of network domains are realized by the centralized OpenFlow controller so as to guarantee the quality of service and realize the optimized configuration of network resources, and the problem of low network resource utilization rate can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a passive optical access network and a flow scheduling method thereof. Background technique [0002] Passive Optical Network (PON, Passive Optical Network) technology composed of Optical Line Terminal (OLT, Optical Line Terminal) and Optical Network Unit (ONU, Optical Network Unit) nodes has huge advantages such as low cost, flexible networking, and low resource occupation , has been widely used in the field of access network. [0003] However, in the current commercial PON equipment operation, the operator needs to regularly visit the access network domain where the user is located, and manage the access network resources and management of the relevant OLT equipment through the network management system according to the user distribution and application service conditions in the domain. The policy is manually modified and configured, such as dynamic bandwidt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/911H04L12/927H04B10/079H04L47/80
CPCH04B10/0793H04L47/783H04L47/80H04L47/83
Inventor 郑彬波王立城王东山刘全春白晖峰赵冲宋彦斌
Owner BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY
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