tailieunhanh - Báo cáo hóa học: " Research Article A Coordinated Resource Allocation Algorithm for Infrastructure-Based Relay Networks"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article A Coordinated Resource Allocation Algorithm for Infrastructure-Based Relay Networks | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2009 Article ID 630964 14 pages doi 2009 630964 Research Article A Coordinated Resource Allocation Algorithm for Infrastructure-Based Relay Networks Christian Muller 1 Anja Klein 1 and Bernhard Raaf2 1 Communications Engineering Lab Technische Universitat Darmstadt Merckstr 25 64283 Darmstadt Germany 2Nokia Siemens Networks GmbH Co. KG St. Martin-Strasse 76 81541 Munchen Germany Correspondence should be addressed to Christian Muller Received 30 January 2008 Revised 15 April 2008 Accepted 3 August 2008 Recommended by Petar Popovski A resource allocation algorithm for orthogonal frequency division multiple access-based and infrastructure-based relay networks is introduced in this paper. The algorithm is applied in the downlink of a single cell. Channel state information is exploited at the transmitting base station BS and at the transmitting relay stations RSs . The algorithm coordinates the allocation of subcarriers bits and power distributed over the BS and RSs. The goal of the resource allocation algorithm is that the sum rate in a cell is maximized. Simultaneously each subscriber station SS achieves a requested data rate called minimum data rate and a tolerated bit error probability is ensured on each link. Simulation results show that a sum rate in a cell is achieved which is near to an upper bound introduced in the paper. Even if the sum of the minimum data rates of all SSs is large the proposed algorithm offers the minimum data rate nearly as reliable as the upper bound. Additionally simulation results show that the proposed algorithm achieves a superior sum rate compared to the sum rate of other resource allocation algorithms. Copyright 2009 Christian Muller et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided .