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Method for enhancing Quality of Service (QoS) of uplink business in hybrid passive optical network

A passive optical network and business service technology, which is applied in data switching networks, selection devices for multiplexing systems, digital transmission systems, etc. QoS, the effect of improving the quality of service

Active Publication Date: 2011-05-04
WUHAN POST & TELECOMM RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are still few methods applicable to HPON, and most of the conclusions are based on the statistical average calculated by Queueing Theory. Although the average delay can be guaranteed, the upper limit of the delay cannot be guaranteed, so it cannot be guaranteed. QoS

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  • Method for enhancing Quality of Service (QoS) of uplink business in hybrid passive optical network
  • Method for enhancing Quality of Service (QoS) of uplink business in hybrid passive optical network
  • Method for enhancing Quality of Service (QoS) of uplink business in hybrid passive optical network

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Embodiment Construction

[0023] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] Such as figure 2 As shown, the method for improving the service quality of uplink business in the hybrid passive optical network of the present invention is applicable to various HPON systems, such as figure 2 Shown is the system diagram of the HPON embodiment, which uses a colorless OUN, and logically divides all ONUs into k groups, and each group of ONUs will use an upstream wavelength. The downlink transmitter in the OLT generates n downlink wavelengths (λ D1 ~λ Dn ), and each wavelength corresponds to one ONU, and these n wavelengths enter the coupler after being modulated. At the same time, the uplink transmitter generates k uplink wavelengths (λ U1 ~λ Uk ) into the coupler, the difference is that the uplink wavelength is not modulated, that is, the blank does not carry any data, while the downlink wavelength is modulated. A...

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Abstract

The invention relates to a method for enhancing Quality of Service (QoS) of uplink business in a hybrid passive optical network, which comprises the following steps: a. when generating a new uplink data stream, an optical network unit (ONU) of a hybrid passive optical network (HPON) firstly reports the characteristic of the data stream to an optical link terminal (OLT) through control information; b. the OLT judges the newcoming data stream according to a preset admission control algorithm, wherein if the remaining uplink bandwidth of the system is sufficient, the data stream is admitted, and else, the data stream is refused; c. the OLT calculates the transmission time allocated to each ONU according to the admitted data stream parameters in each period, which means that the ONU can continuously transmit the data time to the OLT and inform the corresponding ONU through the control information; and d. after acquiring the right of control, the ONU transmits the uplink data according to the time allocated by the OLT. The method can be used for acquiring determined QoS in an HPON system capable of sharing uplink wavelength, so that the HPON system can better support real-time services.

Description

technical field [0001] The present invention relates to the technical field of passive optical network (PON), and specifically relates to a method for improving service quality (QoS) of uplink business in wavelength division time division hybrid passive optical network (WDM-TDM HPON). Background technique [0002] With the increasing maturity of optical fiber communication technology, the cost of optical fiber and optical devices has dropped sharply, and the passive optical network (PON) based on optical fiber has attracted more and more attention. The basic structure of PON is as follows figure 1 As shown, it includes an optical line terminal (OLT) located at the central office (Central Office), multiple optical network units (ONU) located at the user side, and an optical distribution network (ODN) used to connect the OLT and the ONU. ODN generally only includes passive equipment, which is used to distribute the data sent by OLT to each ONU. It can be an optical coupler or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04L12/56H04L47/80
Inventor 薛道均杨铸
Owner WUHAN POST & TELECOMM RES INST CO LTD
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