System and method for realizing unified multicast

Abstract

The invention provides a system and method for realizing unified multicast. The system is used for realizing unified multicast by fusing IP (Internet Protocol) multicast and narrow broadcast based on IPQAM (Quadrature Amplitude Modulator). The system comprises a service data source, a multicast management unit, a TS (Transmission Stream) packaging unit, a router supporting multicast, an IPQAM and a user terminal. The method comprises the following steps of: sending all service requests to the multicast management unit by the user terminal; selecting one way of the IP multicast and the narrow broadcast based on IPQAM by the multicast management unit; if the narrow broadcast based on IPQAM is selected, distributing IPQAM frequency points, and then controlling service data to be sent to the IPQAM; sending a service providing way to the user terminal by the multicast management unit; obtaining the service providing way by the user terminal, if the IP multicast is selected, adding to an IP multicast group and receiving the service data, and if the narrow broadcast based on IPQAM is selected, switching the frequency points and receiving the service data. In the invention, multicast is provided for a user by simultaneously utilizing the router supporting multicast, the multicast way and the narrow broadcast way based on IPQAM, and the system and the method have stronger adaptability to a network environment where the terminal is arranged.

Description

technical field [0001] The invention relates to the field of wired communication, in particular to a system and method for realizing unified multicast. Background technique [0002] In wired communication, multicast technology realizes the problem of efficient data transmission from one point to multiple points, which can save a lot of network bandwidth and reduce network load. [0003] At present, many fruitful researches have been carried out in the field of IP multicast, and some mature protocols and methods have been formed. For example, the group member management generally adopts the IGMPv2 protocol, the intra-domain multicast routing adopts the PIM-SM protocol, and the inter-domain multicast uses the PIM-SM protocol. The method of combining PIM-SM / MBGP / MSDP protocol. In theory, IP multicast technology can provide sufficient bandwidth for user terminals to carry out two-way communication and multicast communication. However, due to the limitation of the network enviro...

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Problems solved by technology

At present, there are specific methods for using IP multicast to provide multicast and using IPQAM narrowcast to provide multicast respectively. However, in the network coverage of user terminals, it is a mixed network that supports IP multicast and IPQAM narrowcast. environment (some user terminals are only in a network environment that supports IP multicast, some user terminals are only in a network environment that supports multicast based on IPQAM narrowcast, and some user terminals are in a group broadcast network environment), when the business data source needs to be sent to the user terminal through multicast, the disadvantage is that two front-end multicast systems and two user terminals need to be deployed for the two multicast technologies. "style" system deployment and maintenance are relatively difficult

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