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Method for multicast via passive optical network

A technology of passive optical network and optical network, applied in the field of passive optical network, can solve the problems of multi-downlink data bandwidth and occupancy, achieve good bandwidth capability, ensure security, and save downlink data bandwidth

Inactive Publication Date: 2006-11-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of the prior art is that when multiple users apply for each multicast channel, the OLT will copy multiple data packets and transmit them to the ONU / ONT in a time-sharing manner, and each ONU / ONT will obtain the corresponding data packets. More downlink data bandwidth

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  • Method for multicast via passive optical network
  • Method for multicast via passive optical network
  • Method for multicast via passive optical network

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Embodiment Construction

[0030] Below according to accompanying drawing and embodiment the present invention will be described in further detail:

[0031] Such as image 3 As shown, the present invention provides a kind of method that realizes passive optical network multicast, and multicast agent is placed in optical network line terminal (OLT), and promptly the multicast application of each client (such as ONU / ONT) sends to OLT , the OLT processes the multicast application and sends the multicast data flow to the ONU / ONT. When multiple ONUs / ONTs apply for the same multicast data stream, the OLT uses a service channel to send only one copy of the multicast data stream, and the ONUs / ONTs that apply for the multicast obtain the receiving authority of the multicast data stream, thereby realizing group broadcast function.

[0032] A key can be generated by the OLT, and the key can be used as the public key of the multicast. When sending the multicast data stream, the key is used for encryption; The op...

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Abstract

The method comprises: in case of multi optical network users having multicast receiving right, the optical network line terminal allocates one downlink service channel for same multicast and sends one multicast bit-stream; the optical network line terminal opens the right to use said downlink service channel for said users having multicast receiving right in order to make said users capable of receiving said multicast bit-stream. The method also can be implemented by means of generating a key at the optical network line terminal, and said key is used as the public key of the multicast and is used to encrypt the multicast bit-stream while said key is transmits to optical user end having multicast receiving right by using another service channel in order to make user end receive and decrypt the encrypted bit-stream.

Description

technical field [0001] The invention relates to the technical field of passive optical network (PON), in particular to a method for realizing multicasting of passive optical network. Background technique [0002] In recent years, with the rapid development of the Internet and the popularization of personal computers, the surge of Internet data flow has exacerbated the capacity limitation of the access part. The traditional copper cable access method in the access network is obviously unable to meet the needs of the growth of communication services. Because optical fiber has the advantages of transmission frequency bandwidth, large capacity, low loss, and strong anti-interference ability, it is very suitable as a transmission medium for high-speed and broadband services. Among various optical access technologies, PON (Passive Optical Network) has attracted much attention due to its advantages such as the use of passive nodes, low installation and operation and maintenance cos...

Claims

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Application Information

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IPC IPC(8): H04L12/22H04L9/00
Inventor 江涛何纲赵峻吴文胜
Owner HUAWEI TECH CO LTD