A caching arrangement for the content of multicast transmission across a data network utilizes a first cache which receives content from one or more content providers. Using the REMADE protocol, the first cache constructs a group directory. The first cache forms the root of a multilevel hierarchical...http://www.google.fr/patents/US7240105?utm_source=gb-gplus-shareBrevet US7240105 - Distributed multicast caching technique
