National Tsing Hua University Institutional Repository:An Adaptive e with QoS Support for the IEEE 802.11 Wireless LANs Retransmission Scheme
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    NTHUR > College of Electrical Engineering and Computer Science > Department of Computer Science > CS Conference Papers >  An Adaptive e with QoS Support for the IEEE 802.11 Wireless LANs Retransmission Scheme

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    Title: An Adaptive e with QoS Support for the IEEE 802.11 Wireless LANs Retransmission Scheme
    Authors: W. T. Chen
    Bo-Bin Jian
    Shou-Chih Lo
    Teacher: 陳文村
    Date: 2002
    Publisher: Institute of Electrical and Electronics Engineers Inc
    Keywords: IEEE standards
    carrier sense multiple access
    mobile computing
    mobile radio
    packet radio
    quality of service
    real-time systems
    telecommunication traffic
    wireless LAN
    Abstract: The medium access control (MAC) protocol of the IEEE 802.11 standard is based on carrier sense multiple access with collision avoidance (CSMA/CA). The basic retransmission mechanism, binary exponential backoff, may cause large packet delay and jitter values that are not suitable for real-time traffic. In this paper, we first investigate some MAC enhancement mechanisms discussed in the IEEE 802.11 task group E, which was formed for enhancing the current 802.11 MAC protocol to support for applications with quality of service (QoS) requirements. Then, we propose a jamming-based retransmission mechanism that is compatible with the 802.11 standard and could reduce the packet delay of real-time traffic. Besides, this mechanism performs stably when the traffic load is heavy. The optimal setting of our proposed mechanism is discussed analytically. We perform simulated experiments by comparing our proposed retransmission mechanism with the other two mechanisms discussed in the 802.11 task group E. We show that the jamming-based retransmission mechanism can reduce the packet delay and the packet dropping rate.
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    Appears in Collections:[Department of Computer Science] CS Conference Papers
    [Institute of Communications Engineering] COM Conference Papers
    [Computer and Communication Research Center ] CCRC Conference Papers

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