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P2P and Handheld Devices

P2P and Handheld Devices. T-110.7100 Applications and Services in Internet, Fall 2008 Jukka K. Nurminen. P2P and handheld devices. Mainly experimental systems so far. E.g. Symella, SymTorrent, P2PSIP Paradigm: bring existing P2P applications to mobile devices Challenges:

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P2P and Handheld Devices

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  1. P2P and Handheld Devices T-110.7100 Applications and Services in Internet, Fall 2008 Jukka K. Nurminen 1V1-Filename.ppt / yyyy-mm-dd / Initials

  2. P2P and handheld devices • Mainly experimental systems so far. E.g. Symella, SymTorrent, P2PSIP • Paradigm: bring existing P2P applications to mobile devices • Challenges: • NAT and firewall traversal • Operator co-operation • High churn • Battery consumption • Billing • Limited resources of the handheld device • Possibilities: • Taking advantage of phone context • Accessing data and functionality of core applications (addressbook, call log, calendar, location, …) • Taking advantage of the human user who can easily be alerted • Research questions • What kind of P2P techniques make sense in mobile networks? • Dealing with the limitations of mobile devices • How will handheld use change P2P? • What new possibilities it allows? • Legal use cases and business models for mobile P2P 2 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  3. Energy-efficient algorithms W Full peer Client only • Battery consumption is one key difference between mobile and fixed peers • How to take the difference into account? • How big problem this really is? • What kind of system solutions and algorithms would be energy-friendly? • Different roles and cooperative use of different radios (3G, WLAN) Nurminen, J.K. and Nöyränen, J., “Energy-Consumption in Mobile Peer-to-Peer – Quantitative Results from File Sharing,” 5th IEEE Consumer Communications & Networking Conference CCNC 2008, Las Vegas, Nevada, January 2008 3 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  4. Nokia Energy Profiler 4 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  5. Energy consumption and # of messages in each 15 min interval for a mobile peer in Mainline BitTorrent DHT (Kademlia) over 1 million users Kelenyi, I. and Nurminen, J.K., “Energy Aspects of Peer Cooperation - Measurements with a Mobile DHT System,” IEEE CoCoNet Workshop 2008 Cognitive and Cooperative Wireless Networks collocated with IEEE ICC 2008, Beijing, China, May 2008 Kelenyi, I. and Nurminen, J.K., “Optimizing Energy Consumption of Mobile Nodes in Heterogeneous Kademlia based Distributed Hash Tables," Second International Conference and Exhibition on Next Generation Mobile Applications, Services and Technologies, Cardiff, Wales, UK, September 2008 (to appear) 5 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  6. For PC benefit reasonably high hardly any cost => high utility => low threshold to contribute For mobile device benefit reasonably high cost can be quite high Energy Phone bill => lower utility, or => strong incentive to be selfish Utility of participating in P2P community Karonen, O. and Nurminen, J.K., “Cooperation Incentives and Enablers for Wireless Peers in Heterogeneous Networks,” IEEE CoCoNet Workshop 2008 Cognitive and Cooperative Wireless Networks collocated with IEEE ICC 2008, Beijing, China, May 2008 Suomalainen, J., Pehrsson, A. and Nurminen, J.K., “A security analysis of a P2P incentive mechanism for mobile devices,” 3rd International Conference on Internet and Web Applications and Services (ICIW 2008), Athens, Greece, June 2008 6 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  7. P2P Credit System Share Download Mobile device Home PC Credit Bank • A group of devices shares the same credit account • Credits earned with one device can be consumed by another device at a later time (in contrast to most existing incentive schemes) 7 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  8. Social Network Search with PhonebookHow to Find a Reliable Painter? Enter a query Painters found  Send query to address book contacts…  … to their contacts… … to their contacts… Persons knowingBill the Painter (if they want totell this) Recommender: Jack *** Recommender phone Bakos, B., Farkas, L., and Nurminen, J. K., “Search Engine for Phonebook-based Smart Phone Networks,” in Proceedings of IEEE 61st Semiannual Vehicular Technology Conference (VTC2005-Spring), Stockholm, Sweden, May, 2005. 8 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  9. Alice is Searching for a Painter Matching profile Painter? Alice Bob Jack Joe Bill Jim Mary Matching profile Bob Painter 1 hitBill Painter 2 hits 9 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  10. mobilephone + Root server Client/Server 1 Client 2 Client 3 Client 4 Client 5 Grid computing with phones Lucas-Lehmer test: 2p-1 is prime if and only if S(p-1) = 0 (mod 2p-1),where S(1) = 4 and S(k+1) = S(k)2-2. Personal Java on Nokia Communicator Bakos, B., Fodor, S., and Nurminen, J. K., “Distributed Computing with Mobile Phones: An Experiment with Mersenne Prime Search,” short paper in Pervasive 2002 International Conference on Pervasive Computing, Zürich, Switzerland, August, 2002. 10 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  11. Raccoon – mobile web server • Same device has both client and server functionality • Cooperation between the client and server parts? Browser Browser “Normal use” Local browser access Web server Web server Communication betweenmobile web servers 11 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  12. What is PAMP? • The acronym LAMP refers to a solution stack of software, usually free software / open-source software, used to run dynamic Web sites or servers. The original expansion is as follows: • Linux, referring to the operator system; • Apache, the Web server, • MySQL, the database management system; • PHP, the programming language. PHP Apache MySQL OpenC Symbian • This stack, familiar to millions of web developers, is now available as a personal version – PAMP – for your S60 mobile phone. 12 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  13. Personal Mobsite Most recent photo taken. Search your mobsite Nice to know. • Access to core data: • Text messages. • Calendar • Contacts By courtesy of graham@pixel8limited.com 13 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  14. Use normal CMS systems on mobile phone • AllBest PHP Open Source CMS finalists run on top of PAMP. • CMS Made Simple, Drupal, e107, Joomla and PHP-Fusion. 14 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  15. Interactive Content - Example 15 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  16. Linking by Proximity – Mobsite Hopping • A new way for linking websites – they are related because they are geographically nearby each other. 16 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  17. Mashup – Facebook 1/2 • Always on - also when you are not logged on! 17 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  18. Available at: http://www2.cs.hut.fi/~tge/pamp/index.php/A_RESTful_Interface_to_a_Mobile_Phone_%28Jari_Kleimola%29 18 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

  19. Code, tools & further information • Symella & SymTorrent & DHT for mobile phones • http://symella.aut.bme.hu • http://symtorrent.aut.bme.hu • http://www.aut.bme.hu/MobileDHT • PAMP • http://wiki.opensource.nokia.com/projects/PAMP (code) • http://www2.cs.hut.fi/~tge/pamp/index.php/Main_Page (examples) • Nokia Energy profiler • http://www.forum.nokia.com/main/resources/user_experience/power_management/nokia_energy_profiler/ • A number of conference papers • Search for authors like “Jukka K. Nurminen”, “Balazs Bakos”, “Matuszewski Marcin” • Books • Ralf Steinmetz, Klaus Wehrle (Eds.): Peer-to-Peer Systems and Applications. Lecture Notes in Computer Science, Volume 3485, Springer, Berlin 2005 • Andy Oram et al., Peer-to-Peer: Harnessing the Power of Disruptive Technologies, Oreilly 2001 • Personally • jukka k nurminen at nokia com 19 V1-Filename.ppt / 2008-10-12 / Jukka K. Nurminen

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