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A kind of dynamic bandwidth allocation method and device

A dynamic bandwidth allocation and bandwidth technology, applied in digital transmission systems, data exchange networks, electrical components, etc., can solve the problems of reducing PON system throughput, large upstream service delay, bandwidth waste, etc., to improve efficiency and upstream service response. The effect of speed, improved throughput and QOS

Active Publication Date: 2019-12-03
FENGHUO COMM SCI & TECH CO LTD
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  • Application Information

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Problems solved by technology

[0012] The technical problem to be solved by the present invention is that when the ONU upstream traffic suddenly increases in the existing DBA algorithm, it will bring a relatively large upstream service delay, and may even cause packet loss; when the ONU upstream traffic suddenly decreases, it will cause bandwidth waste. ; When there is an ONU with a sudden increase in upstream traffic and an ONU with a sudden decrease in upstream traffic at the same time, the throughput and QOS (quality of service) of the entire PON system are reduced

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  • A kind of dynamic bandwidth allocation method and device
  • A kind of dynamic bandwidth allocation method and device
  • A kind of dynamic bandwidth allocation method and device

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Embodiment Construction

[0046] The present invention provides an optimized dynamic bandwidth allocation algorithm in burst mode, which can not only be well compatible with the existing dynamic bandwidth allocation system, but also can improve the efficiency of bandwidth allocation and the response speed of bandwidth allocation, and reduce the uplink Service delay, thereby improving the throughput and QOS of the entire PON system, and the present invention is all implemented on the OLT side, and the dynamic bandwidth allocation algorithm modified by the dynamic change factor of the upstream traffic only adds a small amount of mathematical operations, and these mathematical operations can use hardware Logic (such as FPGA or ASIC) or software implementation does not require additional design on the ONU side, thereby improving the compatibility of the PON system with ONUs, especially suitable for PON systems that need to be compatible with ONUs from multiple manufacturers.

[0047] The present invention w...

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Abstract

The invention discloses a method and device for dynamic bandwidth allocation. The method comprises the following steps: parsing an uplink burst frame, and calculating the average length of valid frames and the average length of idle frames based on acquired uplink traffic information; Calculate the effective frame length change factor and the idle frame length change factor respectively according to the average length and idle frame length; The bandwidth allocation algorithm is revised, and the revised dynamic bandwidth allocation algorithm is used to carry out dynamic bandwidth allocation to the ONU. The invention improves the efficiency of bandwidth allocation and the response speed of upstream services, thereby improving the throughput and service quality of the entire PON system.

Description

technical field [0001] The invention relates to a passive optical network system in the communication field, in particular to a dynamic bandwidth allocation method and device. Background technique [0002] In recent years, PON (Passive Optical Network, Passive Optical Network) has developed rapidly as a high-speed bandwidth access technology. PON systems generally consist of OLT (Optical Line Terminal, Optical Line Terminal), ODN (Optical Distribution Network, Optical Distribution Network) Composed of ONU (Optical Network Unit, Optical Network Unit), in the downlink direction, OLT broadcasts data to all ONUs through ODN; Time slots authorized by the OLT are used for data transmission, and the time slot allocation process is the Dynamic Bandwidth Allocation (DBA, Dynamic Bandwidth Allocation) process of the OLT. [0003] In the related standards of PON system (such as GPON standard ITU-T G.984.3, XGPON standard ITU-T G.987.3 and NGPON2 standard ITU-T G.989.3), the DBA algori...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/917H04L12/911H04L12/927H04L47/76H04L47/80
CPCH04L47/76H04L47/805H04L47/822
Inventor 李祥辉
Owner FENGHUO COMM SCI & TECH CO LTD