1st International ICST Conference on Quality of Service in Heterogeneous Wired/Wireless Networks

Research Article

QoS-driven asynchronous uplink subchannel allocation algorithms for space-time OFDM-CDMA systems in wireless networks

  • @INPROCEEDINGS{10.1109/QSHINE.2004.45,
        author={ Xi  Zhang and Jia  Tang },
        title={QoS-driven asynchronous uplink subchannel allocation algorithms for space-time OFDM-CDMA systems in wireless networks},
        proceedings={1st International ICST Conference on Quality of Service in Heterogeneous Wired/Wireless Networks},
        publisher={IEEE},
        proceedings_a={QSHINE},
        year={2004},
        month={12},
        keywords={},
        doi={10.1109/QSHINE.2004.45}
    }
    
  • Xi Zhang
    Jia Tang
    Year: 2004
    QoS-driven asynchronous uplink subchannel allocation algorithms for space-time OFDM-CDMA systems in wireless networks
    QSHINE
    IEEE
    DOI: 10.1109/QSHINE.2004.45
Xi Zhang1, Jia Tang 1
  • 1: Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

Abstract

In order to support the diverse quality of service (QoS) requirements for differentiated data applications in broadband wireless networks, advanced techniques such as space-time coding (STC) and orthogonal frequency division multiplexing (OFDM) are implemented at the physical layer. However, the employment of such techniques evidently affects the subchannel-allocation algorithms at the medium access control (MAC) layer. In this paper, we propose the QoS-driven cross-layer subchannel-allocation algorithms for data transmissions over asynchronous uplink space-time OFDM-CDMA systems. We mainly focus on QoS requirements of maximizing the best-effort throughput and proportional bandwidth fairness, while minimizing the upper-bound of scheduling delay. Our extensive simulations show that the proposed infrastructure and algorithms can achieve high bandwidth fairness and system throughput while reducing scheduling delay over wireless networks.