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Cross-layer design for single-cell OFDMA systems with heterogeneous QoS and partial CSIT

Research output: Contribution in Book/Report/ProceedingsPaper

Published

Publication date2009
Host publicationWireless Communications and Networking Conference, 2009. WCNC 2009. IEEE
PublisherIEEE
Pages1-6
Number of pages6
ISBN (Electronic)978-1-4244-2948-6
ISBN (Print)978-1-4244-2947-9
Original languageEnglish

Abstract

This paper proposes a novel cross-layer scheduling scheme for a single-cell orthogonal frequency division multiple access (OFDMA) wireless system with partial channel state information (CSI) at transmitter (CSIT) and heterogeneous user delay requirements. Previous research efforts on OFDMA resource allocation are typically based on the availability of perfect CSI or imperfect CSI but with small error variance. Either case consists to typify a non tangible system as the potential facts of channel feedback delay or large channel estimation errors have not been considered. Thus, to attain a more realistic resolution our cross-layer design determines optimal subcarrier and power allocation policies based on partial CSIT and individual user's quality of service (QoS) requirements. The simulation results show that the proposed cross-layer scheduler can maximize the system's throughput and at the same time satisfy heterogeneous delay requirements of various users with significant low power consumption.