Decoder with PIM function, and real-time monitoring system and method using same

Abstract

The invention relates to a decoder with PIM function, comprising PIM processing unit for making the decoder join / leave multicast group; and a real-time monitoring system adopting the decoder comprises: monitoring terminal, multicast network, control server and client end with decoder, where the decoder receives the control server-issued configuration information containing multicast source address and multicast group address and generates corresponding PIM join / prune message and issues the message to the multicast network, which applies PIM SSM to build / prune shortest multicast path between the decoder and monitoring terminal so as to unicast the monitoring terminal / stop the unicast. And it does not require client end to support IGMP protocol and has no special requirements for edge equipment, and can apply PIM SSM on the condition that the edge equipment and client end do not support IGMPv3.

Description

technical field [0001] The present invention relates to decoder and real-time monitoring system, specifically, the present invention relates to a kind of decoder with PIM (Protocol Independent Multicast, Protocol Independent Multicast) function, and adopt the real-time monitoring system of this decoder and corresponding real-time monitoring method. Background technique [0002] The PIM SM (Sparse Mode, sparse mode) protocol is currently the most mature and widely used multicast routing protocol. Apply PIM SM to IP multicast real-time monitoring, and its operation process is shown in Figure 1: When a client needs to order monitoring data of a certain monitoring terminal (that is, the multicast source), it is first sent by the decoder connected to the client. IGMP (Internet Group Management Protocol, Internet Group Management Protocol) membership report message, hoping to join the multicast group to which the multicast source belongs and receive the multicast stream of the gr...

AI Technical Summary

Problems solved by technology

This deployment has the following obvious defects: 1. The number of multicast groups carried by the entire system will increase with the increase of monitoring terminals, and may eventually become very large; 2. Each monitoring terminal is assigned a group address , it is a waste of group addresses, and the addition of monitoring terminals may make the original group address configuration insufficient, so that the configuration needs to be changed again, resulting in increased management costs; 3. The number of RPs required by the entire system is too large, making BSR (BootStrap Router, bootstrapping router) has a heavy burden; 4. The single point of failure formed by RP and BSR requires additional equipment to provide redundancy

Therefore, PIM SSM is more suitable for point-to-multipoint multicast services, but it requires edge devices to support IGMPv3, and currently most devices only support IGMPv2

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