A data distribution system capable of suppressing a fall of the efficiency of operation of a network due to repeated data retransmission in the network when distributing a large volume of data from a data distribution server on a data provider side to a data receiver side access server via the network....http://www.google.de/patents/US7287065?utm_source=gb-gplus-sharePatent US7287065 - Data distribution system and network cache apparatus, data distribution server, and access server used for the same
