The ForceP2P Video-on-Demand (VOD) system is a new generation of P2P VOD system based on UDP protocol , launched after two years' specialized R&D by the ForceTech company and massive customers' practical uses, solving the unsmooth and excessive bandwidth occupancy in traditional streaming playing, enabling an enterprise-grade and telecom-class P2P VOD system featuring no-buffering and extreme low bandwidth occupancy.

The ForceP2P VOD software system comprises:

    ·ForceP2P web page ActiveX control

    ·ForceP2P VOD server

Figure I: The logic architecture diagram of the ForceP2P VOD system

    ·Main features of the ForceP2P VOD system:

1) It's a complete suite of system solution for P2P transmission specific to VOD fully based on UPD protocol transmission , based on the unique patented Force Swarming Methodology algorism, in light of the actual situation in China that there are quite a lot of intranet users. It allows more than 90% of intranet users to upload and contribute torrent files in the most cost-effective and active manner and allows more than 90% of the nodes which join the ForceTech P2P network transmission to leverage the upstream and downstream bandwidth cost-effectively and make the file block request and check transmission more accurate, thus reducing the invalid request and file transmission dramatically, saving the idle occupancy of network bandwidth significantly, guaranteeing the low bandwidth occupancy and low resource consumption in live broadcasting and VOD, and ensuring the high resolution and high smoothness of transmission.

2) Save the investments in servers and server bandwidth resources dramatically in that it can save the bandwidth resources by over 8-15 times than the traditional streaming system and the P2P VOD single-server generally can support 700-1500 online users for 1000 movies at 400kbps code rate.

3) Powerful streaming server function, enabling direct access and cache of all types of video files, i.e., with the ForceP2P VOD system, the streaming server systems such as Media Server and Helix Server will be needed no more.

4) Modular design and development fully for commercial applications, enabling P2P advantages to be embedded into applications in all other industries in a real flexible and easy way.

5) Multi-code stream self-adaptive design, allowing the system to select different code streams for playing video automatically based on the actual network bandwidths of different users'.

6) Completely liberation from the centrally-controlled Media table in that the channel list is acquired from the server in real time, which is updated at any time; the data is cached in memory but not in hard drive, thus avoiding any damage to hard drive.

7) Support the multimedia data in various formats including asf, wmv, rm, rmvb, mp3, etc. and support multi-level and many classification methods.

8) Professional P2P server group scale-up capability. The system adopts content distribution/load balancing and other technologies and supports multi-node unlimited scale-up.

9) Offer the ForceP2P-based DRM copyright protection for audio/video programs, i.e., while a file is downloaded to the local computer, it can not be played before certificated.

10) Development of a complete suite of stable and transmission-guaranteed UDP protocol by ourselves, fully solving loss of UDP protocol packets.

11) Complete transparency to firewalls and NATs, enabling the full-connection between intranets in the real meaning, enlarging the coverage of torrent files.