Method and system of multicast and video-on-demand

Abstract

The invention discloses a five-multicast ordering method, comprising: a client end determines to receive multicast flow of some multicast source and sends multicast source ID-carrying ordering request to a control server, and the control server adds multicast source address and client end address into a multicast addition message and sends it to a transmitter connected with the client end, where the transmitter comprises access switcher and / or edge router, the transmitter finds outlet information according to the received client end address and adds the outlet information into an outlet list of multicast transfer items corresponding to the multicast source address; and the invention also discloses a five-multicast ordering system, comprising client end, control server, and transmitter, where the transmitter comprises access switcher and / or edge router, and multicast source connected router. And the invention saves network resources and raises multicast ordering efficiency.

Description

technical field [0001] The invention relates to the technical field of multicast services, in particular to a multicast on-demand method and system. Background technique [0002] In order to ensure social security, each city has set up monitoring systems at key points such as various institutions and traffic arteries, and uses mass storage systems to store recorded video data. At present, for a city, the typical monitoring system configuration is: the municipal bureau has 20 sub-bureaus, each sub-bureau has 25 police stations, and each police station has 1,000 (K) cameras. Each camera is a multicast source and has a multicast group address. The city bureau, each sub-bureau, and each police station can view the images monitored by any camera. When the orderer wants to view the screen monitored by a certain camera through the client, he can connect to the corresponding police station, sub-bureau or city bureau router through the access switch or edge router directly connecte...

AI Technical Summary

Problems solved by technology

[0011] figure 2 The flow shown has the following disadvantages: the access switch needs to monitor the IGMP membership report message in real time, which will occupy more resources of the access switch and affect the on-demand efficiency of the multicast service

At present, the number of multicast forwarding table items supported by routers is generally relatively small. If the storage resources of the router's table items are exhausted, the client cannot continue to order multicast streams from other multicast sources through the router.

[0022] 2. There are many RP routers, resulting in a heavy burden on the bootstrap router (BSR).

[0025] 4. Since the multicast stream is identified by the multicast group, it is necessary to assign a multicast group address to each camera. If the number of cameras exceeds the number of multicast group addresses originally allocated to the police station due to the increase of cameras, Then it is necessary to reassign the multicast group address to the police station, which increases the management cost

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