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Mobile P2P - Creating a mobile file-sharing environment

Mobile P2P - Creating a mobile file-sharing environment. Johnny Biström, Ville Partanen. Agenda. Research questions What is mobile P2P Solution: Full mobile phone based P2P Solution: Computer aided mobile P2P Solution: The future of mobile P2P: JXTA Threats to mobile P2P Conclusion.

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Mobile P2P - Creating a mobile file-sharing environment

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  1. Mobile P2P - Creating a mobile file-sharingenvironment Johnny Biström, Ville Partanen

  2. Agenda • Research questions • What is mobile P2P • Solution: Full mobile phone based P2P • Solution: Computer aided mobile P2P • Solution: The future of mobile P2P: JXTA • Threats to mobile P2P • Conclusion

  3. Research questions • How can file sharing be realized in mobile networks today? • How will the upcoming 3G-networks support file sharing? • What are the threats for file sharing and how can they be overcome?

  4. Mobile P2P? • Transferring data from one mobile phone to another • Mobile phone and network limit the possibilities of mobile P2P • Low efficiency (CPU and memory) • Low bandwidth • Low power • Billing

  5. Full mobile P2P in 2/2.5G • In 2/2.5 there are limitations that are impossible to overcome: • Operators do not allow to see mobile phones IP address • Operators control data traffic including ports suitable for them • Network does not offer any way to sustain active connection in all situations • Voice and data can not be transferred simultaneously

  6. A solution to 2/2.5 P2P: MMS • MMS could be used as a way of sending data from one mobile note to another. However there are problems: • How to know who has the information you need? • MMS size is limited • MMS costs more than GPRS data

  7. A solution to 2/2.5 P2P: MMS • We have to have a server that keeps a record of MSISDN number and the data that can be found from that number • Downloader asks the data and the person who is downloaded permits or denies download

  8. A better solution: computer aided P2P • All the major limitations could be overcome if the mobile phone would be connected to a computer which has P2P software • We would only need a software to communicate between the computer and mobile phone: • Short distance: IR, BT, PC suite etc. • Remotely: Over HTTP

  9. Computer aided P2P: short distance • Within short distance we would not have true mobile P2P: • A better solution would be to control fixed network peer remotely

  10. Computer aided mobile P2P: remotely • For example over http we could control the fixed network peer by using a program called mobile eMule

  11. Computer aided mobile P2P: eMule 3. download to computer 4. download to phone 1. login 2. search • eMule is a working solution but does not currently implement full download to mobile phone

  12. JXTA – Tomorrow’s P2P solution • Background • Software Architecture • Network Architecture • Protocols • Example Applications • JXME

  13. JXTA - Background • started by Sun Microsystems in 2001 • Open Source, royalty free licence • platform independent (mobile phone ->) • architecture and protocols • uses HTTP, TCP/IP and XML • builds virtual ad-hoc network on top of physical network

  14. JXTA – Software Architecture

  15. JXTA – Network Architecture JXTA 2

  16. JXTA - Protocols Core Specification Protocols • Peer Resolver Protocol (PRP) • Endpoint Routing Protocol (ERP) Standard Service Protocols • Rendezvous Protocol (RVP) • Peer Discovery Protocol (PDP) • Peer Information Protocol (PIP) • Peer Binding Protocol (PBP)

  17. JXTA – Example Applications JXTA Shell • command line interface • enables publishing, searching, messaging, discovering, piping and more MyJXTA • open soure example application • enables group chatting, secure chatting, credential groups in addition to JXTA Shell

  18. JXTA – MyJXTA2 interface

  19. JXTA – JXME (JXTA for J2ME) Working Proxy based solution exists

  20. JXTA – JXME (JXTA for J2ME) Proxyless solution under development

  21. Threats to mobile P2P • In 3G true mobile P2P is possible due to high bandwidth, efficient mobile phones and simultaneous voice and data capability-> But will the operators allow P2P software since is would lead to the loss of revenues? • Viruses, spy- and adware • Digital rights management

  22. Conclusions • 2/2.5G is not ready for mobile P2P. However with the aid of computer killer applications could be developed • 3G does not have technical restrictions so the future of mobile P2P will be mainly in the hands of the operators

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