Competition Versus Cooperation on the MISO Interference Channel
2008 (English)In: IEEE Journal on Selected Areas in Communications, ISSN 0733-8716, E-ISSN 1558-0008, Vol. 26, no 7, 1059-1069 p.Article in journal (Refereed) Published
We consider the problem of coordinating two competingmultiple-antenna wireless systems (operators) that operatein the same spectral band. We formulate a rate region whichis achievable by scalar coding followed by power allocationand beamforming. We show that all interesting points on thePareto boundary correspond to transmit strategies where bothsystems use the maximum available power. We then argue thatthere is a fundamental need for base station cooperation whenperforming spectrum sharing with multiple transmit antennas.More precisely, we show that if the systems do not cooperate,there is a unique Nash equilibrium which is inefficient in the sensethat the achievable rate is bounded by a constant, regardless ofthe available transmit power. An extension of this result to thecase where the receivers use successive interference cancellation(SIC) is also provided.Next we model the problem of agreeing on beamformingvectors as a non-transferable utility (NTU) cooperative gametheoreticproblem, with the two operators as players. Specificallywe compute numerically the Nash bargaining solution, which isa likely resolution of the resource conflict assuming that theplayers are rational. Numerical experiments indicate that selfishbut cooperating operators may achieve a performance which isclose to the maximum-sum-rate bound.
Place, publisher, year, edition, pages
2008. Vol. 26, no 7, 1059-1069 p.
multiple-input single-output channel, interference channel, non-cooperative game theory, cooperative game theory
National CategoryEngineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-22003DOI: 10.1109/JSAC.2008.080904OAI: oai:DiVA.org:liu-22003DiVA: diva2:242305
©2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. Erik G. Larsson and Eduard Jorswieck, Competition Versus Cooperation on the MISO Interference Channel, 2008, IEEE Journal on Selected Areas in Communications, (26), 7, 1059-1069. http://dx.doi.org/10.1109/JSAC.2008.0809042009-10-072009-10-072012-12-20