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Applications of Game Theory for Radio Resource Management in Wireless Networks

Applications of Game Theory for Radio Resource Management in Wireless Networks. Vaggelis G. Douros douros@aueb.gr. «ΤΟ ΟΠΑ ΕΡΕΥΝΑ» 11.03.2014. Outline. 1994, Nobel Econ. 2001. Grand Bazaar, IST. Motivation & Challenges(1).

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Applications of Game Theory for Radio Resource Management in Wireless Networks

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  1. Applications of Game Theory for Radio Resource Management in Wireless Networks Vaggelis G. Dourosdouros@aueb.gr «ΤΟ ΟΠΑ ΕΡΕΥΝΑ» 11.03.2014

  2. Outline 1994, Nobel Econ. 2001 Grand Bazaar, IST

  3. Motivation & Challenges(1) • “The number of mobile-connected devices will exceed the world’s population by 2014”, Cisco, 2014 • Map of Fon Wi-Fi APs in (part of) London, April 2013 • via http://corp.fon.com/maps

  4. Motivation & Challenges(2) • via wikipedia: Europe mobile phone penetrationmap

  5. Motivation & Challenges(3) • Too many devices coexist in the same area • and compete for radio spectrum • (-) very limited resource • The problem: (-) Too much interference • The challenge: (How) Can we control it? National Telecommunications and Information Administration, Spectrum Map, USA, 2012

  6. On the Interference Mitigation in Wireless Networks Through… • Power control (PC): How to choose the transmission power to achieve a Quality of Service (QoS) target • Some challenges for a successful power control algorithm [1] http://wcdma3g.blogspot.gr/

  7. Power Control Using Game Theory • We focus on scenarios where nodes have differentQoS targets and (at least some of) them are autonomous (e.g., APs) • We need distributed power control schemes • Competition for resources among players • =(non-cooperative) game theory • Key Issues/Our Roadmap: • Has the game a Nash Equilibrium (NE)? • How can we find it? • Is it unique? If not, which to choose? • Is it (Pareto) efficient?

  8. Non-Cooperative Power Control in Small Cell Networks [2] • low-power devices that operate in licensed spectrum • More devices…more interference! • Two-tier small cell network • Our work: Study efficient coexistence with GT http://www.smallcellforum.org

  9. Power Control & Bargaining for Wireless Providers Revenue Improvement • Both Blue and Gold providers transmit at Pmax and earn X and Y € • Our work: Can we do it better? • Blue makes a ‘take it or leave it’ offer to the Gold • “I give you E €to reduce your power t times” • X’-E>X • Gold accepts iffY’+E>Y • Win-win scenario

  10. Trunc(ated) Power Control [Zander, TVT ’92] (-)Unfair for this node – no opportunity to achieve its target More importantly: how to oblige an autonomous entity to power off? Power Control Using Bargaining in Wireless Devices (1) [3] I am 15% below my QoStarget  I am 20% below my QoStarget  I achieved my QoStarget  I am 40% below my QoStarget

  11. We cannot dictate to an AP to power off/reduce its power! Our work: Unsatisfied links negotiate in pairs. Each one uses part of its budget to make an offer to the other Power Control Using Bargaining in Wireless Devices (2) I offer you 100 credits if you reduce your power 20% I am 15% below my QoStarget  OK! No thanks! I am 20% below my QoStarget  I achieved my QoStarget  I am 40% below my QoStarget

  12. Channel Access in Device-to-Device (D2D) Communication [4] • More devices…more interference • Our work: Channel access in D2D scenarios  which device should transmit/receive data when • Devices decide autonomously using game theory

  13. Glimpses of the Future • We have a lot to do! Your contributions are welcome! ;-)

  14. References • [1] V.G. Douros and G.C. Polyzos, “Review of Some Fundamental Approaches for Power Control in Wireless Networks,” Elsevier Computer Communications, 2011. • [2] V.G. Douros, S. Toumpis and G.C. Polyzos, “Power Control Under Best Response Dynamics for Interference Mitigation in a Two-Tier Femtocell Network,” Proc. WIOPT-RAWNET, 2012. • [3] V.G. Douros, G.C. Polyzos and S. Toumpis, “Negotiation-Based Distributed Power Control in Wireless Networks with Autonomous Nodes,” Proc. VTC2011-Spring, 2011. • [4] V.G. Douros, S. Toumpis and G.C. Polyzos, “On the Nash Equilibria of Graphical Games for Channel Access in Multihop Wireless Networks,” Proc. WCNC-Wireless Evolution beyond 2020, 2014.

  15.  Ευχαριστώ! Vaggelis G. Douros Mobile Multimedia Laboratory Department of Informatics Athens University of Economics and Business douros@aueb.gr http://mm.aueb.gr/~douros

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