A distributed controllable multicast system of passive optical network and its implementation method

Abstract

The method comprises: both ONU and OLT transmit data by using the subscriber virtual channel and multicast virtual channel; said multicast data is transmitted from OLT to ONU via said multicast virtual channel; wherein, said multicast system comprises a IPTV service controlling module and a IPTV service executing module; the IPTV service controlling module is used to save the multicast right of each user; the information about said multicast right is transmitted to the IPTV executing module via said subscriber channel; said IPTV executing module is set on ONU and is used for saving the multicast right of each user; according to the multicast right of user and the request of user, ONU relays the multicast data to the port of each user.

Description

technical field [0001] The present invention relates to a multicast system of a passive optical network, in particular to a distributed and controllable multicast system of a passive optical network and its realization method. Background technique [0002] With the vigorous development of broadband access, more and more families use broadband Internet access services, and the multicast service is one of the most important broadband Internet access services. Multicast has a very large demand for bandwidth, and the bandwidth of many access technologies is close to the limit, which cannot meet the high bandwidth requirements of future home and business users. [0003] Therefore, the prior art proposes passive optical network (PON, Passive Optical Network) technology, which uses optical transmission technology, has the advantages of long transmission distance and large transmission bandwidth, and due to the use of passive nodes, the maintainability and availability of PON , and...

AI Technical Summary

Problems solved by technology

[0012] However, in the prior art, when a large number of interfaces are connected to the ONU and multiple end users are connected to the ONU, the centralized multicast system is used, and the OLT needs to process a large number of protocol packets within a unit time, so that the performance often fail to meet the requirements

Because a large number of protocol packets need to be processed, higher performance and more resources are required for the OLT. If the processor of the OLT is not strong enough, the protocol packets cannot be processed in time and cannot meet the system requirements.

At the same time, the use of centralized control requires the OLT to make a judgment and then set the ONU, which will cause a long delay for users to join and affect the user's audio-visual experience

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