Border Games in Cellular Networks - PowerPoint PPT Presentation

Loading...

PPT – Border Games in Cellular Networks PowerPoint presentation | free to download - id: 167eec-MmQxN



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Border Games in Cellular Networks

Description:

M rk F legyh zi*, Mario Cagalj , Diego Dufour*, Jean-Pierre Hubaux ... power control game, GPC. operators have an incentive to be strategic ... – PowerPoint PPT presentation

Number of Views:46
Avg rating:3.0/5.0
Slides: 17
Provided by: cry6
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Border Games in Cellular Networks


1
Border Games in Cellular Networks
Márk Félegyházi, Mario Cagalj, Diego Dufour,
Jean-Pierre Hubaux Ecole Polytechnique
Federale de Lausanne (EPFL), Lausanne,
Switzerland University of Split, Croatia
Infocom 2007
2
Problem
  • spectrum licenses do not regulate access over
    national borders
  • adjust pilot power to attract more users

Is there an incentive for operators to apply
competitive pilot power control?
3
Related Work
  • Power control in cellular networks
  • up/downlink power control in CDMA Hanly and Tse
    1999, Baccelli et al. 2003, Catrein et al. 2004
  • pilot power control in CDMA Kim et al. 1999,
    Värbrand and Yuan 2003
  • using game theory Alpcan et al. 2002, Goodman
    and Mandayam 2001, Ji and Huang 1998, Meshkati et
    al. 2005, Lee et al. 2002
  • Coexistence of service providers
  • wired Shakkottai and Srikant 2005, He and
    Walrand 2006
  • wireless Shakkottai et al. 2006, Zemlianov and
    de Veciana 2005

4
System model (1/2)
  • Network
  • cellular networks using CDMA
  • channels defined by orthogonal codes
  • two operators A and B
  • one base station each
  • pilot signal power control
  • Users
  • roaming users
  • users uniformly distributed
  • select the best quality BS
  • selection based signal-to-interference-plus-noise
    ratio (SINR)

5
System model (2/2)
TAw
pilot signal SINR
TBw
TAv
PB
PA
B
v
A
Pi pilot power of i
processing gain for the pilot signal
channel gain between BS i and user v
traffic signal SINR
noise energy per symbol
available bandwidth
own-cell interference affecting the pilot signal
own-cell interference factor
traffic power between BS i and user v
set of users attached to BS i
other-to-own-cell interference factor
6
Game-theoretic model
  • Power Control Game, GPC
  • players ? networks operators (BSs), A and B
  • strategy ? pilot signal power, 0W lt Pi lt 10W, i
    A, B
  • standard power, PS 2W
  • payoff ? profit, where is
    the expected income serving user v
  • normalized payoff difference

7
Simulation
8
Is there a game?
  • only A is strategic (B uses PB PS)
  • 10 data users
  • path loss exponent, a 2

?i
9
Strategic advantage
  • normalized payoff difference

10
Payoff of A
  • Both operators are strategic
  • path loss exponent, a 4

11
Nash equilibrium
  • unique NE
  • NE power P is higher than PS

12
Efficiency
zero-sum game
  • 10 data users

13
Convergence to NE (1/2)
  • convergence based on better-response dynamics
  • convergence step 2 W

PA 6.5 W
14
Convergence to NE (2/2)
  • convergence step 0.1 W

15
Summary
  • two operators on a national border
  • single-cell model
  • pilot power control
  • roaming users
  • power control game, GPC
  • operators have an incentive to be strategic
  • NE are efficient, but they use high power
  • simple convergence algorithm
  • extended game with power cost
  • Prisoners Dilemma

http//people.epfl.ch/mark.felegyhazi
16
Future work
  • multiple base stations
  • repeated game with power cost
  • strategic modeling of users
  • cooperative game of operators
About PowerShow.com