BitTorrent over Optical Network - A Content Distribution Platform in cooperation with P2P and OCS Network

Optical network technologies based on WDM (Wavelength Division Multiplexing) are actively researched and developed. However, adaptive cooperation of their property with network applications is not considered deeply. On the other hand, as one of attractive content distribution systems, many researchers focus on P2P(Peer-to-Peer) technologies. Currently, content delivery system with P2P is based on IP network, and its application to optical network has not been directly considered yet, though it is attractive to transfer huge content between data centers or between Origin servers, etc, in addition to forthcoming various large contents. Therefore we consider adaptive cooperation between P2P and optical network to distribute huge contents more efficiently but to supress the Origin server load, and propose the novel and future content distribution platform called BitTorrent over Optical Network (BT-ON). In BT-ON, the OCS (Optical Circuit Switching) is adopted as optical switching scheme due to its feasibility and suitability to large content transfer, while BitTorrent is done as P2P system due to its efficiency and generality. To overcome the technical issues caused by OCS network architecture where the physical resources are actually reserved by specific signaling processes, the BT-ON introduces some novel methods; application-triggered path set-up procedure, wavelength path allocation method, advanced improvement suitable for OCS network like wavelength-path based parallel request and enlargement of data transmission unit, and the peer grouping according to wavelength path reservation status.