TY - JOUR
T1 - Cross-layer optimization and receiver localization for cognitive networks using interference tweets
AU - Marques, Antonio G.
AU - Dall'Anese, Emiliano
AU - Giannakis, Georgios B.
PY - 2014/3
Y1 - 2014/3
N2 - A cross-layer resource allocation scheme for underlay multi-hop cognitive radio networks is formulated, in the presence of uncertain propagation gains and locations of primary users (PUs). Secondary network design variables are optimized under long-term probability-of-interference constraints, by exploiting channel statistics and maps that pinpoint areas where PU receivers are likely to reside. These maps are tracked using a Bayesian approach, based on 1-bit messages-here refereed to as »interference tweet»-broadcasted by the PU system whenever a communication disruption occurs due to interference. Although nonconvex, the problem has zero duality gap, and it is optimally solved using a Lagrangian dual approach. Numerical experiments demonstrate the ability of the proposed scheme to localize PU receivers, as well as the performance gains enabled by this minimal primary-secondary interplay.
AB - A cross-layer resource allocation scheme for underlay multi-hop cognitive radio networks is formulated, in the presence of uncertain propagation gains and locations of primary users (PUs). Secondary network design variables are optimized under long-term probability-of-interference constraints, by exploiting channel statistics and maps that pinpoint areas where PU receivers are likely to reside. These maps are tracked using a Bayesian approach, based on 1-bit messages-here refereed to as »interference tweet»-broadcasted by the PU system whenever a communication disruption occurs due to interference. Although nonconvex, the problem has zero duality gap, and it is optimally solved using a Lagrangian dual approach. Numerical experiments demonstrate the ability of the proposed scheme to localize PU receivers, as well as the performance gains enabled by this minimal primary-secondary interplay.
KW - Bayesian estimation
KW - Cognitive radio networks
KW - Lagrange dual
KW - cross-layer optimization
KW - receiver localization
UR - http://www.scopus.com/inward/record.url?scp=84896747438&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84896747438&partnerID=8YFLogxK
U2 - 10.1109/JSAC.2014.1403009
DO - 10.1109/JSAC.2014.1403009
M3 - Article
AN - SCOPUS:84896747438
SN - 0733-8716
VL - 32
SP - 641
EP - 653
JO - IEEE Journal on Selected Areas in Communications
JF - IEEE Journal on Selected Areas in Communications
IS - 3
M1 - 6746253
ER -