Supporting Service Differentiation with Enhancements of the IEEE 802.11 MAC Protocol: Models and Analysis

Li, Bo and Battiti, Roberto (2003) Supporting Service Differentiation with Enhancements of the IEEE 802.11 MAC Protocol: Models and Analysis. UNSPECIFIED. (Unpublished)

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    Abstract

    As one of the fastest growing wireless access technologies, Wireless LANs must evolve to support adequate degrees of service differentiation. Unfortunately, current WLAN standards like IEEE 802.11 Distributed Coordination Function (DCF) lack this ability. Work is in progress to define an enhanced version capable of supporting QoS for multimedia traffic at the MAC layer. In this paper, we aim at gaining insight into three mechanisms to differentiate among traffic categories, i.e., differentiating the minimum contention window size, the Inter-Frame Spacing (IFS) and the length of the packet payload according to the priority of different traffic categories. We propose an analysis model to compute the throughput and packet transmission delays. In additions, we derive approximations to get simpler but more meaningful relationships among different parameters. Comparisons with discrete-event simulation results show that a very good accuracy of performance evaluation can be achieved by using the proposed analysis model.

    Item Type: Departmental Technical Report
    Department or Research center: Information Engineering and Computer Science
    Subjects: Q Science > QA Mathematics > QA075 Electronic computers. Computer science
    Uncontrolled Keywords: Wireless LAN, IEEE 802.11 MAC, Service Differentiation, Performance Evaluation
    Additional Information: Submitted to IEEE Transactions On Wireless Communications
    Report Number: DIT-03-024
    Repository staff approval on: 12 Jun 2006

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