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Method for optical network unit depart from multicast set in passive optical network system

A technology of optical network units and passive optical networks, applied in the field of optical network units leaving multicast groups quickly

Active Publication Date: 2010-08-04
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The downlink of the GPON system is bandwidth sharing. If the specification of the downlink bandwidth is to support N channels to forward multicast traffic at the same time, and the access of N channels is already being forwarded, when the user switches the multicast channel, because the channel 2 to leave The traffic forwarding stops after 2 seconds, resulting in no bandwidth available for the new channel within 2 seconds. On the user's terminal, it shows that the channel switch needs to wait for a period of time. Compared with the switching time of analog TV, it is very difficult for the user. accept
At the same time, these multicast traffic that no ONU needs to receive also wastes the downstream bandwidth of the GPON system

Method used

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  • Method for optical network unit depart from multicast set in passive optical network system
  • Method for optical network unit depart from multicast set in passive optical network system
  • Method for optical network unit depart from multicast set in passive optical network system

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specific Embodiment approach

[0037] Step 103, the optical line terminal parses the multicast group information carried by the message, including the multicast address of the multicast group, and obtains the address of the ONU that sends the message from the passive optical network protocol layer that encapsulates the message Uniquely identify ONU-ID;

[0038] Step 104, the optical line terminal uses the multicast address as an index, and judges whether the multicast group to be joined by the optical network unit is a new multicast group by querying the multicast ONU table maintained by itself, that is, whether it has Maintain the multicast ONU table with this multicast address as index, if yes, then execute step 105; otherwise execute step 106;

[0039] Step 105, the optical line terminal establishes a multicast ONU table indexed by the multicast address of the multicast group, and maintains the correspondence between the multicast address of the multicast group and the ONU-ID of the ONU that joins the mu...

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Abstract

A method separating optical network unit in passive optical network system from multicast set includes obtaining a message if separating an optical network unit from multicast set by optical link terminal, deleting off information said optical network unit in corresponding relation by said optical link terminal and judging whether information of optical network unit in said corresponding relationis empty or not, detecting message continuously if it is not or otherwise stopping transmission of multicast data at all multicast set.

Description

technical field [0001] The invention relates to a method for leaving a multicast group in a passive optical network system, in particular to a method for an optical network unit to quickly leave a multicast group in a passive optical network. Background technique [0002] The current broadband access technologies are mainly copper wire access technologies (such as various digital subscriber line DSL technologies) and optical access technologies (such as fiber-to-the-home FTTH, or fiber-to-the-building FTTB, fiber-to-the-curb FTTC access technologies), Through various access technologies, users are connected to the broadband network. Passive Optical Network (PON) access technology is a kind of FTTH access technology, and PON technology is an optical access technology for point-to-multipoint transmission. PON networking methods such as figure 1 As shown, a typical PON access system is composed of an Optical Line Terminal (OLT for short), an Optical Distribute Network (ODN fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/12H04L29/06H04L45/16
Inventor 牛乐宏
Owner HUAWEI TECH CO LTD
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