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Method and device for realizing multicast demanding under ring network environment

A ring network and multicast technology, applied in CCTV systems, electrical components, selective content distribution, etc., can solve problems such as inability to effectively control multicast video streams

Active Publication Date: 2015-06-03
RAISECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method and device for realizing multicast on-demand in a ring network environment, so as to solve the problem that the multicast source switch in the industrial ring network video monitoring system cannot monitor the multicast video of each multicast source. The problem of effective control of flow

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  • Method and device for realizing multicast demanding under ring network environment
  • Method and device for realizing multicast demanding under ring network environment

Examples

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Embodiment 1

[0126] In the embodiment of the present invention, the multicast source switch ( figure 1 The multicast source interface in SW4) includes the setting of the PIN reverse on-demand function, so that in the PIM reverse on-demand mode, the multicast source switch sends an IGMP report message to the node switch in the ring network through the multicast source interface , the node switch (also called a Layer 2 switch) determines its own Layer 2 multicast forwarding table according to the packet. When there is no outbound interface matching the multicast group number of the multicast source in the multicast forwarding table of the multicast source, the multicast source sends an IGMP leave message to the node switch through the multicast source interface, and the node switch updates the Layer 2 multicast forwarding table, which isolates the multicast video stream sent by the multicast source. Furthermore, in the video monitoring ring network, arbitrary flooding of video multicast pac...

Embodiment 2

[0184] Embodiments of the present invention provide another method for realizing multicast on-demand in a ring network environment, as follows image 3 As an example, the method for implementing multicast on-demand in the ring network environment provided by Embodiment 2 of the present invention is described in detail. image 3 Another flow chart of a method for implementing multicast on-demand in a ring network environment provided by an embodiment of the present invention. In an embodiment of the present invention, the subject of implementation is a node switch, such as image 3 As shown, it mainly includes the following steps:

[0185] Step 310, the node switch receives the first IGMP report message sent by the multicast source switch through the multicast source interface, and the first IGMP report message includes the information of the multicast source connected to the node switch in the ring network Multicast group number.

[0186] Specifically, a plurality of node sw...

Embodiment 3

[0236]This embodiment introduces a method for implementing multicast on-demand in a ring network environment in combination with specific applications, and the method includes the operations of a multicast source switch and a node switch.

[0237] The specific implementation of the method in this embodiment will be described below mainly from the four processes of function enabling, user on-demand joining, ring network failover, and user canceling on-demand.

[0238] combine first figure 1 The network structure shown illustrates some supporting configurations in the ring network.

[0239] The camera is a multicast source, and each camera is connected to the node switch;

[0240] SW1~SW3 are node switches, which have opened the unknown multicast filtering function (that is, shielding unknown multicast), and run the IGMP snooping function, SW1~SW3 will be connected to the port and ring network of the multicast source (for example, camera) The port is set as an mroute port (the...

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Abstract

The invention discloses a method and device for realizing multicast demanding under a ring network environment, and relates to the technology of video control. The method disclosed by the invention comprises the following steps: starting the PIM reverse demanding mode of a multicast source interface in a multicast source switch; under the PIM reverse demanding mode, sending a first IGMP reporting message to a node switch in the same ring network by the multicast source switch, and determining a two-layer multicast forwarding table according to the first IGMP reporting message by the node switch; when no output interface matched with the multicast group number of a multicast source exists in the multicast forwarding table, sending a first IGMP leaving message to the node switch by the multicast source switch, updating the two-layer multicast forwarding table according to the first IGMMP leaving message by the node switch, and isolating a multicast video stream sent by the multicast source. According to the invention, arbitrary flooding of video multicast messages can be rejected in the video monitoring ring network, so that the link bandwidth is greatly reduced, and the shock pressure of the multicast source port of the multicast source switch is reduced.

Description

technical field [0001] The invention relates to video control technology, in particular to a scheme for realizing multicast on-demand in a ring network environment. Background technique [0002] Video surveillance systems are widely used in transportation, security and other industries. Currently, real-time video streams are carried by unicast or multicast. [0003] For unicast bearer, the Internet Protocol (Internet Protocol, referred to as: IP) unicast method is used to send real-time video streams, but when there are many users who order videos, there is a bottleneck in the processing performance of streaming media servers (mainly referring to surveillance cameras), and at the same time It also consumes link bandwidth. For multicast bearer, since IP multicast is adopted, for one real-time video, no matter how many users order it, the link occupied is the bandwidth of one video stream, thus saving the link bandwidth. Therefore, the multicast bearer mode is mostly used in...

Claims

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Application Information

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IPC IPC(8): H04N7/18H04N21/6405H04N21/643
Inventor 刘鹏
Owner RAISECOM TECH
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