Electrical computers and digital processing systems: multicomput – Computer conferencing – Demand based messaging
Reexamination Certificate
2011-06-28
2011-06-28
Follansbee, John (Department: 2451)
Electrical computers and digital processing systems: multicomput
Computer conferencing
Demand based messaging
C709S204000, C709S201000
Reexamination Certificate
active
07970835
ABSTRACT:
A peer-to-peer filing sharing system and method are provided which allow peers in a P2P network system to download segments of a large file in indeterminate order, storing them in a database and making those segments available to other peers in the P2P network system. Given the possibility that only a few peers in the P2P network system may have a complete copy of the file at any given time, the potentially many peers each having a different subset of segments from the total file, can immediately make the segments available to other peers. Given a sufficient number of peers, and a reasonable amount of time, it is highly likely that a complete copy of the file will exist and be distributed throughout the P2P network system, even if the original provider disconnects from the P2P network system or by some other reason becomes unavailable.
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Carter DeLuca Farrell & Schmidt LLP
Follansbee John
Woolcock Madhu
Xerox Corporation
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