Ascending link bandwidth dynamic distribution method and appts. based on ethernet passive optical network

A passive optical network and link bandwidth technology, applied in the field of dynamic bandwidth allocation, it can solve the problems affecting the response speed and accuracy of bandwidth allocation, different message content and format, false bandwidth request reports, etc., to protect investment costs and simplify Hardware and software functions, the effect of preventing malicious encroachment

Inactive Publication Date: 2005-01-12
FENGHUO COMM SCI & TECH CO LTD
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  • Abstract
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Problems solved by technology

If the hardware of a certain ONU fails, or the central office equipment discards the report information of some ONUs, it will affect the response speed and accuracy of the upstream bandwidth allocation of the entire system
Moreover, this mechanism is easily used by malicious users to report false bandwidth requests and excessively occupy uplink bandwidth, resulting in unfair bandwidth allocation.
Moreover, since different algorithms may require different parameters, the content or format of the REPORT message is limited by the algorithm, which may easily cause the content and format of the REPORT message sent by remote devices of different manufacturers to be different.
This affects the interconnection and intercommunication of equipment from different manufacturers.

Method used

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  • Ascending link bandwidth dynamic distribution method and appts. based on ethernet passive optical network
  • Ascending link bandwidth dynamic distribution method and appts. based on ethernet passive optical network
  • Ascending link bandwidth dynamic distribution method and appts. based on ethernet passive optical network

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Embodiment Construction

[0059] The method and device of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0060] The method and device for allocating upstream bandwidth based on flow statistics described in the present invention determines the size of the upstream bandwidth allocated to the ONU by counting the size of the upstream traffic sent by each ONU received by the central office equipment OLT. The whole technical solution can be divided into two parts, one part is the device in the OLT for ONU upstream traffic statistics and calculation bandwidth allocation, and the other part is the dynamic bandwidth allocation method based on this device.

[0061] Figure 5 A schematic diagram of the module structure of the device used to realize the uplink bandwidth dynamic allocation method of the present invention. Figure 5 , the various functional modules above the dotted line are realized by various functional programs run by the embedded CPU (in ...

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Abstract

The invention includes a statistical and sampling device, proportion weighting algorithm and bandwidth utilization ratio adjusting algorithm. Based on proportion between upward traffic of optical network unit (OUN) and total upward traffic in unit time, local device assigns bandwidth for OUN through proportion weighting algorithm. Based on bandwidth utilization ratio of upward traffic of OUN, the said adjusting algorithm adjusts bandwidth assigned for the OUN. Statistic is carried out for all OUNs connected to a terminal in optical route. Algorithms are supported by field programmable gate array (FPGA) and embedded CPU.

Description

technical field [0001] The present invention relates to a bandwidth dynamic allocation method and a device for realizing the method, in particular to a method for realizing dynamic allocation of uplink bandwidth in a gigabit Ethernet-based passive optical network (EPON) and an optical line terminal in the network A device for implementing the method described above. Background technique [0002] An Ethernet-based passive optical network (EPON) is composed of an optical line terminal (OLT) at the central office, several optical network units (ONU) at the remote end, and a passive optical distribution network (ODN). Typical topology structured as figure 1 shown. Among them, the ODN adopts a passive optical network (PON) structure with a passive optical splitter, and a backbone optical fiber is connected to multiple optical fibers through a passive optical splitter (splitter) to communicate with multiple ONUs. [0003] The optical signals transmitted in two directions in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/08H04L12/24H04L12/28H04Q11/00
Inventor 杨柳何岩焦名圣杨永胜
Owner FENGHUO COMM SCI & TECH CO LTD
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