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Dynamic distribution control of upward band width in passive optical network

A passive optical network, dynamic allocation technology, applied in data exchange network, optical fiber transmission, data exchange through path configuration, etc. Market needs, inability to manage bandwidth and other issues, to achieve the effect of simple and convenient uplink bandwidth management, centralized and easy-to-control bandwidth management, and ensuring rationality

Active Publication Date: 2007-06-06
北京格林伟迪科技股份有限公司 +1
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Problems solved by technology

[0010] However, in the case of dynamic bandwidth allocation, since the time for each ONU to send data is not fixed, it is not possible to directly use EPON to carry E1 technology to support traditional TDM services, and the dynamic bandwidth allocation mechanism of the current EPON system is based on the request of ONU users. The corresponding bandwidth cannot be managed, and the bandwidth requested by users can only be provided with best effort, so its service quality is also best effort, which cannot meet the operational and manageable requirements of telecom operators for the integrated service platform. requirements, can not meet the actual market needs

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  • Dynamic distribution control of upward band width in passive optical network
  • Dynamic distribution control of upward band width in passive optical network
  • Dynamic distribution control of upward band width in passive optical network

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Embodiment Construction

[0035] The uplink of the present invention adopts the mode of time-division multiplexing, that is, in the round of authorization that the OLT allocates bandwidth to each online ONU, the OLT is all based on the agreement bandwidth between each ONU and the OLT and the situation of each ONU real-time service flow. The uplink is fairly divided into time slots of different sizes, which are respectively authorized to corresponding ONUs; each ONU can only send or receive data in the authorized time slot allocated to itself.

[0036] In the point-to-multipoint system of EPON, the maximum period T is defined. The OLT first obtains the bandwidth agreement between each ONU customer and the operator through the network management interface, and calculates the basic bandwidth threshold of each ONU: BTh=BW×T, where BW is the bandwidth size of the agreement, and the basic bandwidth threshold is also the maximum value of the ONU customer. Bandwidth authorization value. Then, through the EPON...

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Abstract

The dynamical distribution control is made on the passive optical network composed of OLT, optical distribution network (ODN), and multi ONU. The dynamical distribution control for ONU up stream in Ethernets is: each online ONU reports to OLT in the frame for requesting bandwidth according to its data buffer size and package; OLT figures out authorization initial time and the length of authorizing band width according to reported data buffer size and base band width threshold calculated from up stream band width protocol of the ONU, and packages it in the frame for band width authorization and transmits it to the ONU. The dynamical distribution control for up stream band width of E1 service data of each ONU: OLT figures out fist authorizing time and authorizing band width length of each ONU E1 service data, and package it in the frame for band width authorization and sends it to each ONU; each ONU receiving the bandwidth authorization will transmit E1 service data at first authorization time, then transmitting periodically.

Description

technical field [0001] The invention relates to an Ethernet-based multi-service passive optical network technology, which is a dynamic bandwidth allocation control method for uplink signals, which can effectively improve the utilization rate of uplink bandwidth and guarantee bandwidth rights and interests of users. Background technique [0002] The Ethernet-based multi-service passive optical network (EPON) system uses a local end device - Optical Line Terminal (OLT for short), and connects multiple remote devices - Optical Network Units through a passive optical distribution network. (Optical Net Unit, ONU for short), forming a point-to-multipoint tree topology structure. [0003] Referring to FIG. 1 and FIG. 2 , the figures respectively show the downstream data flow direction and the upstream data flow direction in the multi-service EPON (MS-EPON) system topology. [0004] Referring to Figure 1, in the downlink direction, the optical signals transmitted by the downlink si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/28H04L12/24H04B10/20H04Q3/52H04B10/25H04L47/76
Inventor 陈雪邓羽黄翔
Owner 北京格林伟迪科技股份有限公司
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