Data networks
Microwave Mobile Communications
Microwave Mobile Communications
OFDMA for Broadband Wireless Access (Artech House Mobile Communications)
OFDMA for Broadband Wireless Access (Artech House Mobile Communications)
Rate-maximizing power allocation in OFDM based on partial channel knowledge
IEEE Transactions on Wireless Communications
Cross-Layer Design for OFDMA Wireless Systems With Heterogeneous Delay Requirements
IEEE Transactions on Wireless Communications
A performance comparative study on the implementation methods for OFDMA cross-layer optimization
Future Generation Computer Systems
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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.