Method and system for downloading in ubiquitous network by means of multicast

Abstract

A method and system for downloading in a ubiquitous network by means of multicast are disclosed. The method includes: after requesting to download a media service, a terminal acquires, from a tracing server, an address of a cache server corresponding to the media service, and requests the cache server to transmit the media service; after receiving the request, the cache server triggers a context server to determine, according to a preset multicast terminal threshold value, whether a condition for triggering multicast is met; when the condition for triggering multicast is met, the cache server cooperates with the context server and a joint radio resource management server to determine a plurality of terminals participating in multicast and a multicast channel; and the cache server sending data of the media service to each terminal on the multicast channel via a resource control node. According to the solution provided by the disclosure, a user is able to obtain a media multicast service in the case of being unable to learn the surrounding multicast group situation, which not only can make the best of the radio resources, but also can implement rapid media download for the user.