Graduate School and Research Center in Digital Sciences

Distributed resource allocation algorithms for multi-operator cognitive communication systems

Tohidi, Ehsan; Gesbert, David; Ciblat, Philippe

EUSIPCO 2020, 28th European Signal Processing Conference, 18-22 January 2021, Amsterdam, The Netherlands

We address the problem of resource allocation (RA) in a cognitive radio (CR) communication system with multiple secondary operators sharing spectrum with an incumbent primary operator. The key challenge of the RA problem is the interoperator coordination arising in the optimization problem so that the aggregated interference at the primary users (PUs) does not exceed the target threshold. While this problem is easily solvable if a centralized unit could access information of all secondary operators, it becomes challenging in a realistic scenario. In this paper, considering a satellite setting, we alleviate this problem by proposing two approaches to reduce the information exchange level among the secondary operators. In the first approach, we formulate an RA scheme based on a partial information sharing method which enables distributed optimization across secondary operators. In the second approach, instead of exchanging secondary users (SUs) information, the operators only exchange their contributions of the interference-level and RA is performed locally across secondary operators. These two approaches, for the first time in this context, provide a trade-off between performance and level of inter-operator information exchange. Through the numerical simulations, we explain this trade-off and illustrate the penalty resulting from partial information exchange. 

Document Arxiv Bibtex

Title:Distributed resource allocation algorithms for multi-operator cognitive communication systems
Type:Conference
Language:English
City:Amsterdam
Country:NETHERLANDS
Date:
Department:Communication systems
Eurecom ref:6265
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Bibtex: @inproceedings{EURECOM+6265, year = {2020}, title = {{D}istributed resource allocation algorithms for multi-operator cognitive communication systems}, author = {{T}ohidi, {E}hsan and {G}esbert, {D}avid and {C}iblat, {P}hilippe}, booktitle = {{EUSIPCO} 2020, 28th {E}uropean {S}ignal {P}rocessing {C}onference, 18-22 {J}anuary 2021, {A}msterdam, {T}he {N}etherlands}, address = {{A}msterdam, {NETHERLANDS}}, month = {08}, url = {http://www.eurecom.fr/publication/6265} }
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