Distributed scheduling and resource allocation for cognitive OFDMA radios

Juan Andres Bazerque, Georgios B Giannakis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

23 Scopus citations

Abstract

Scheduling spectrum access and allocating power and rate resources are tasks affecting critically the performance of wireless cognitive radio (CR) networks. The present contribution develops a primal-dual optimization framework to schedule any-to-any CR communications based on orthogonal frequency division multiple access (OFDMA) and allocate power so as to maximize the weighted average sum-rate of all users. Fairness is ensured among CR communicators and possible hierarchies are respected by guaranteeing minimum rate requirements for primary users while allowing secondary users to access the spectrum opportunistically. The framework leads to an iterative channel-adaptive distributed algorithm whereby nodes rely only on local information exchanges with their neighbors to attain global optimality. Simulations confirm that the distributed online algorithm does not require knowledge of the underlying fading channel distribution and converges to the optimum almost surely from any initialization.

Original languageEnglish (US)
Title of host publicationProceedings of the 2nd International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CrownCom
Pages343-350
Number of pages8
DOIs
StatePublished - Dec 1 2007
Event2nd International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CrownCom - Orlando, FL, United States
Duration: Aug 1 2007Aug 3 2007

Publication series

NameProceedings of the 2nd International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CrownCom

Other

Other2nd International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CrownCom
Country/TerritoryUnited States
CityOrlando, FL
Period8/1/078/3/07

Fingerprint

Dive into the research topics of 'Distributed scheduling and resource allocation for cognitive OFDMA radios'. Together they form a unique fingerprint.

Cite this