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Báo cáo hóa học: " Research Article QoS-Guaranteed Power Control Mechanism Based on the Frame Utilization for Femtocells Pavel Mach and Zdenek Becvar"

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 QoS-Guaranteed Power Control Mechanism Based on the Frame Utilization for Femtocells Pavel Mach and Zdenek Becvar | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2011 Article ID 259253 16 pages doi 10.1155 2011 259253 Research Article QoS-Guaranteed Power Control Mechanism Based on the Frame Utilization for Femtocells Pavel Mach and Zdenek Becvar Department of Telecommunication Engineering Faculty of Electrical Engineering Czech Technical University in Prague Technicka2 166 27 Prague Czech Republic Correspondence should be addressed to Pavel Mach machp2@fel.cvut.cz Received 3 September 2010 Revised 17 January 2011 Accepted 18 February 2011 Academic Editor Sangarapillai Lambotharan Copyright 2011 P. Mach and Z. Becvar. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. The paper focuses on a power control mechanism and proposes a novel approach for dynamic adaptation of femtocells transmitting power. The basic idea is to adapt the transmitting power of femtocells according to current traffic load and signal quality between user equipments and the femtocell in order to fully utilize radio resources allocated to the femtocell. The advantage of the proposed scheme is in provisioning of high quality of service level to the femtocell users while interference to users attached to macrobase station is minimized. The paper proposes the power adaptation algorithm and evaluates its performance in terms of mobility events achieved throughput and FAPs transmitting power. Performed simulations show that the proposed scheme can significantly reduce the number of mobility events caused by passerby users and thus to minimize signaling overhead generated in the network. In addition our proposal enhances overall throughput for most of the investigated scenarios in comparison to other power control schemes. 1. Introduction In the recent years the demands for high data rates have been driven .