US Patent No. 9,319,226

METHOD AND SYSTEM FOR DOWNLOADING IN UBIQUITOUS NETWORK BY MEANS OF MULTICAST


Patent No. 9,319,226
Issue Date April 19, 2016
Title Method And System For Downloading In Ubiquitous Network By Means Of Multicast
Inventorship Aifang Sun, Shenzhen (CN)
Assignee ZTE CORPORATION, Shenzhen, Guangdong (CN)

Claim of US Patent No. 9,319,226

1. A method for downloading in a ubiquitous network by multicast, comprising:
after requesting to download a media service, acquiring, by a terminal from a tracing server, an address of a cache server
corresponding to the media service, and requesting the cache server to transmit the media service;

after receiving the request, triggering, by the cache server, 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, cooperating, by the cache server, 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

sending, by the cache server, data of the media service to each terminal on the multicast channel via a resource control node,
wherein the triggering of the context server to determine, according to the preset multicast terminal threshold value, whether
the condition for triggering multicast is met comprises:

after receiving the request, sending, by the cache server, a signalling for inquiring a multicast condition to the context
server, and

determining, according to working conditions of surrounding terminals of the terminal returned by the context server and the
preset multicast terminal threshold value, whether the condition for triggering multicast is met,

wherein the preset multicast terminal threshold value comprises:
a preset index evaluated according to the number of terminals participating in multicast, multicast service transmission progress
and quality of the multicast channel.