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Method and system for sending data in passive optical network (PON)

A passive optical network and data technology, applied in the field of communication, can solve the problems of unable to reply OLT, ONU can not reply in time, etc., to achieve the effect of improving communication quality

Active Publication Date: 2011-06-01
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to propose a method and system for data transmission in a passive optical network to solve the problem that the ONU in the GPON system cannot reply in time or cannot reply to the message sent by the OLT

Method used

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  • Method and system for sending data in passive optical network (PON)
  • Method and system for sending data in passive optical network (PON)
  • Method and system for sending data in passive optical network (PON)

Examples

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Effect test

example 1

[0093] In the GPON system, the ONU registration and activation process is as follows:

[0094] Step 1, the ONU listens to the downlink GTC (GPON Transmission Convergence, GPON Transmission Convergence) frame sent by the OLT and obtains frame synchronization;

[0095] Step 2, the OLT periodically sends the Upstream_overhead parameters message (or the OLT periodically sends the Upstream_overhead parameters message and the Extended_Burst_Length message) and SN_Request (serial number request) (or other upstream bandwidth used to authenticate the ONU message) in a downstream frame allocation), and open a quiet window for the ONU to send a reply message for the ONU.

[0096] Step 3, the unregistered activated ONU listens to and obtains the parameter configuration in the Upstream_overhead parameters message (or Upstream_overhead parameters message and Extended_Burst_Length message), and receives the upstream bandwidth allocation of SN_Request (or other upstream bandwidth used to auth...

example 2

[0102] In the GPON system, the ONU registration and activation process is as follows:

[0103] Step 1, the ONU listens to the downlink GTC frame sent by the OLT and obtains frame synchronization;

[0104] Step 2, the OLT periodically sends the Upstream_overhead parameters message (or the OLT periodically sends the Upstream_overhead parameters message and the Extended_Burst_Length message) and SN_Request (or other upstream bandwidth allocations for authenticating ONU messages) in a downlink frame, and for The ONU opens a quiet window for the ONU to send a reply message.

[0105] Step 3, the unregistered activated ONU listens and obtains the parameter configuration in the Upstream_overhead parameters message (or Upstream_overhead parameter message and Extended_Burst_Length message), and receives the upstream bandwidth allocation of SN_Request (or the upstream bandwidth of other messages used to authenticate the ONU After allocation), respond to the Serial_Number_ONU message (or...

example 3

[0111] In the GPON system, the ONU registration and activation process is as follows:

[0112] Step 1, the ONU listens to the downlink GTC frame sent by the OLT and obtains frame synchronization;

[0113] Step 2, ONU listens to and obtains the parameter configuration in the Upstream_overhead parameters message (or the Upstream_overhead parameters message and the Extended_Burst_Length message that OLT periodically sends) that OLT periodically sends;

[0114] Step 3, the unregistered activated ONU listens to the SN_Request sent by the OLT, and responds to the OLT with a Serial_Number_ONU message after receiving the SN_Request;

[0115] Step 4, after the OLT receives the Serial_Number_ONU message sent by an ONU and obtains the corresponding serial number, the OLT sends the Assign_ONU-ID message and the Ranging_Request to the ONU in the same downlink frame, and opens an ONU for the ONU Quiet window for sending reply messages.

[0116] Step 5: After receiving the Assign_ONU-ID me...

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Abstract

The invention discloses a method and system for sending data in a passive optical network (PON). In the method, when an optical line terminal (OLT) sends messages needing to be responded by an optical network unit (ONU) to the ONU, uplink bandwidth is allocated for the ONU; and the ONU sends the responded messages to the OLT in accordance with the allocated uplink bandwidth. According to the invention, the ONU can respond to the messages sent by the OLT in real time, and the communication quality between the OLT and the ONU can be improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for sending data in a passive optical network. Background technique [0002] Gigabit-Capable Passive Optical Network (GPON) technology is an important technical branch of the Passive Optical Network (PON) family. Similar to other PON technologies, GPON is also a A passive optical access technology using a point-to-multipoint topology. [0003] The topology of GPON system is as follows: figure 1 shown. GPON is composed of an optical line terminal (Optical Line Terminal, OLT for short), an Optical Network Unit (ONU for short) on the user side, and an Optical Distribution Network (ODN for short). Point-to-multipoint network structure. ODN is composed of passive optical components such as single-mode optical fibers, optical splitters, and optical connectors, and provides optical transmission media for the physical connection between OLT and ONU. [0004] In the GPON...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04J3/16
Inventor 张伟良耿丹
Owner ZTE CORP
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