Optical network unit (ONU) energy-saving method for improving bandwidth utilization rate

Abstract

The invention relates to an optical network unit (ONU) energy-saving method for improving bandwidth utilization rate, which comprises the following steps that: an optical line terminal (OLT) sets a judgment condition that the ONU enters an energy-saving state; the OLT respectively sets the starting time of a first energy-saving period when the ONU enters the energy-saving state, the duration of a sleep mode, the duration of a work mode, and the times of the energy-saving period and sets a minimum authorization interval T1; when the ONU meets the judgment condition of the energy-saving state, the OLT sends a permission message for entering the energy-saving state; after receiving the permission message, the ONU checks whether data needing sending exists or not at the time; if the data needing sending do not exist, the ONU is switched to the energy-saving state from a normal state in the set time of the first energy-saving period; after entering the sleep mode, the ONU is immediately switched to the normal state if the data needing sending exist; and when the periodic alternate times of the sleep mode and the work mode reach a set value, whether the energy-saving condition is met or not is rejudged. By the method, the communication times between the OLT and the ONU can be reduced and the bandwidth utilization rate is improved.

Description

technical field [0001] The invention relates to passive optical network technology, in particular to a message interaction mechanism between an ONU and an OLT when an ONU enters an energy-saving state from a normal working state. Background technique [0002] Passive Optical Network (PON, Passive Opitcal Network) technology is a point-to-multipoint optical fiber transmission and access technology, such as figure 1 As shown, PON refers to the optical distribution network (ODN, Optical Distribution Network) between the optical line terminal (OLT, Optical Link Terminal) and the optical network unit (ONU, Optical Network Unit) without any active electronic equipment, and generally the downlink adopts The broadcast mode and the uplink adopt time-division multiple access mode, which can flexibly form topological structures such as tree, star, and bus. [0003] The principle of PON data transmission is as follows: [0004] PON technology uses Time Division Multiple Access (TDMA) ...

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Problems solved by technology

[0007] Aiming at the defects existing in the prior art, the purpose of the present invention is to provide an ONU energy-saving method, an optimized interactive protocol mechanism, and reduce as much as possible between the OLT and the ONU without affecting the energy-saving effect and increasing the complexity of the system. The number of communications, improve the utilization of bandwidth

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