Method and system for downloading in multicast way in ubiquitous network

Abstract

The invention discloses a method for downloading in a multicast way in a ubiquitous network. The method comprises the following steps that: after making a request of downloading a media service, a terminal acquires the address of a cache server corresponding to the media service from a tracking server, and makes a request of transmitting the media service to the cache server; after receiving the request, the cache server triggers a context server to judge whether multicast triggering conditions are met or not according to a preset multicast terminal threshold value; if the multicast triggering conditions are met, the cache server determines a plurality of terminals and a multicast channel which participate in multicast in combination with the context server and a joint wireless resource management server; and the cache server transmits the data of the media service to each terminal on the multicast channel through a resource control node. The invention also discloses a corresponding system. By the method and the system, wireless resources can be fully utilized, the rapid media downloading of a user can be realized, and lost packets and missing video parts are subjected to point-to-point compensation at the same time to ensure the quality of downloaded media data.

Description

technical field [0001] The invention relates to a multicast technology in a ubiquitous network collaborative environment where multiple heterogeneous networks are integrated, in particular to a method and system for downloading in a ubiquitous network through multicast. Background technique [0002] According to the formulation of the current ubiquitous network-related standards and industry research, the entire ubiquitous network collaboration architecture is recognized as being divided into the perception extension layer, the network / service layer and the application layer. Among them, there are many kinds of terminals in both the perception extension layer and the application layer, and these terminal devices can be roughly divided into two categories: one is the terminal group managed by the gateway, through Universal Plug and Play (UPNP) Various protocols such as various protocols realize the interconnection and intercommunication of devices, and the gateway is connecte...

AI Technical Summary

Problems solved by technology

Most of the traditional IP multicast methods are aimed at real-time business scenarios, such as multipoint conference, media broadcast, status monitoring, etc. If a new member joins during business transmission, it must already know the multicast group and its related members situation, and it is not possible to obtain the traffic flow for the transport before joining

In the ubiquitous collaborative environment, due to the heterogeneity of the network and terminals, the traditional IP multicast method cannot be applied

The main problem is that users cannot obtain media multicast services without knowing the surrounding multicast groups; in addition, for terminal devices that join in the multicast process, users cannot obtain the Use the multi-mode and multi-interface characteristics of the terminal to obtain more network capacity

Images