Method for implementing proxy interception multicast

An implementation method and multicast technology, which is applied in the branch office to provide special service devices, data exchange details, digital transmission systems, etc., can solve the problems of increasing the processing load of the main control, large system resources, and slow establishment of multicast forwarding tables , to achieve the effect of reducing system resource consumption, reducing the number of packets, and reducing the processing load

Active Publication Date: 2013-01-02
PHICOMM (SHANGHAI) CO LTD
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for implementing proxy listening to multicast, to solve the above-mentioned pr

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  • Method for implementing proxy interception multicast

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Embodiment Construction

[0021] The present invention will be further described below in combination with the principle diagram and specific operation embodiments.

[0022] At present, PON systems basically adopt IGMP Proxy / IGMP Snooping protocol to realize multicast. Such as figure 1 As shown, the method for implementing proxy snooping multicast of the present invention is applied to a PON access system to achieve multicast. The PON access system includes an OLT main control panel and an OLT line card. The OLT main control panel is equipped with an IGMP Proxy protocol running OLT line card is equipped with a module running IGMP Snooping protocol. The implementation principle of IGMP Proxy: OLT builds a multicast table by intercepting IGMP messages between users and routers. The upstream port of the proxy device performs the role of the host, and the downstream port performs the role of the router. The realization principle of IGMP Snooping: The OLT forms the correspondence between group members and po...

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Abstract

The invention discloses a method for implementing proxy interception multicast. The method is applied to a process for implementing multicast by a passive optical network (PON) access system. The PON access system comprises an optical line terminal (OLT) main control disk and an OLT line clamp, wherein a module for running an internet group management protocol (IGMP)Proxy protocol is arranged on the OLT main control disk; a module for running an IGMPSnooping protocol is arranged on the OLT line clamp; a timer is involved; when the main control disk sends a query message of a multicast group, the timer is switched on and is used for setting time T; the state of the multicast group is set to be not received; if the message of the multicast group is received within the time T, the state of the multicast group is set to be received; and on the premise that the state of the multicast group is received, if the message of the multicast group is received again, a transferring table is only constructed on the OLT line clamp, and the message is not submitted to the OLT main control disk. By utilizing the method, the problem of massive report messages submitted to the main control disk is solved.

Description

Technical field [0001] The invention relates to a PON system multicast mode, in particular to a method for implementing proxy listening multicast. Background technique [0002] Passive Optical Network (PON, Passive Optical Network), also known as Passive Optical Network, is a type of optical communication network. Its characteristic is that it can complete signal processing without power supply. In addition to terminal equipment that needs electricity, the nodes in the middle are Constructed with fiber optic components. [0003] A PON device contains a central office node called Optical Line Terminal (OLT), one or more user nodes called Optical Network Units (ONUs) or Optical Network Terminals (ONTs), and one called Optical Line Terminal (ONTs). The divider of the distribution network (ODN) is between these two devices. At present, the mainstream OLT equipment consists of a main control board (active and standby) and a line card (or also called a service board or an interface boa...

Claims

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Application Information

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IPC IPC(8): H04L12/18H04L12/761H04L45/16
Inventor 陈凯邱全华
Owner PHICOMM (SHANGHAI) CO LTD
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