TY - GEN
T1 - Stochastic feedback control for spatial interference avoidance
AU - Huang, Kaibin
AU - Lau, Vincent K.N.
AU - Kim, Dongku
PY - 2010
Y1 - 2010
N2 - Spatial interference avoidance is a simple and effective way of mitigating interference in multi-antenna wireless networks. The deployment of this technique requires channel-state-information (CSI) feedback from each receiver to all interferers, resulting in substantial network overhead. This paper proposes the method of distributive feedback control that intelligently allocates feedback bits over multiple feedback links and adapts feedback to channel dynamics. Using tools from stochastic optimization, the structure of the optimal control policy is characterized. Specifically, the optimal numbers of feedback bits are proved to increase with corresponding interference-channel gains and feedback is performed only when such gains are large or the transmit-CSI errors are significant. Simulation demonstrates that the proposed feedback-control design yields significant throughput gain over the conventional fixed-feedback approach especially at low mobility.
AB - Spatial interference avoidance is a simple and effective way of mitigating interference in multi-antenna wireless networks. The deployment of this technique requires channel-state-information (CSI) feedback from each receiver to all interferers, resulting in substantial network overhead. This paper proposes the method of distributive feedback control that intelligently allocates feedback bits over multiple feedback links and adapts feedback to channel dynamics. Using tools from stochastic optimization, the structure of the optimal control policy is characterized. Specifically, the optimal numbers of feedback bits are proved to increase with corresponding interference-channel gains and feedback is performed only when such gains are large or the transmit-CSI errors are significant. Simulation demonstrates that the proposed feedback-control design yields significant throughput gain over the conventional fixed-feedback approach especially at low mobility.
UR - http://www.scopus.com/inward/record.url?scp=79958002183&partnerID=8YFLogxK
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U2 - 10.1109/ACSSC.2010.5757705
DO - 10.1109/ACSSC.2010.5757705
M3 - Conference contribution
AN - SCOPUS:79958002183
SN - 9781424497218
T3 - GLOBECOM - IEEE Global Telecommunications Conference
SP - 937
EP - 941
BT - Conference Record of the 44th Asilomar Conference on Signals, Systems and Computers, Asilomar 2010
PB - IEEE Computer Society
T2 - IEEE GLOBECOM 2006 - 2006 Global Telecommunications Conference
Y2 - 27 November 2006 through 1 December 2006
ER -