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Provisioning QoS for WiFi-enabled Portable Devices in Home Networks

Eun-Chan Park ; Nojun Kwak ; Suk Kyu Lee ; Jong-Kook Kim ; Hwangnam Kim

KSII Transactions on Internet and Information Systems(TIIS), April 2011, Vol.5(4), pp.720-740 [Tạp chí có phản biện]

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  • Nhan đề:
    Provisioning QoS for WiFi-enabled Portable Devices in Home Networks
  • Tác giả: Eun-Chan Park ; Nojun Kwak ; Suk Kyu Lee ; Jong-Kook Kim ; Hwangnam Kim
  • Chủ đề: Ieee 802.11 ; Service Differentiation ; Tcp Congestion Control ; Home Network
  • Là 1 phần của: KSII Transactions on Internet and Information Systems(TIIS), April 2011, Vol.5(4), pp.720-740
  • Mô tả: Wi-Fi-enabled portable devices have recently been introduced into the consumer electronics market. These devices download or upload content, from or to a host machine, such as a personal computer, a laptop, a home gateway, or a media server. This paper investigates the fairness among multiple Wi-Fi-enabled portable devices in a home network when they are simultaneously communicated with the host machine. First, we present that, a simple IEEE 802.11-based home network suffers from unfairness, and the fairness is exaggerated by the wireless link errors. This unfairness is due to the asymmetric response of the TCP to data-packet loss and to acknowledgment-packet loss, and the wireless link errors that occur in the proximity of any node; the errors affect other wireless devices through the interaction at the interface queue of the home gateway. We propose a QoS-provisioning framework in order to achieve per-device fairness and service differentiation. For this purpose, we introduce the medium access price, which denotes an aggregate value of network-wide traffic load, per-device link usage, and per-device link error rate. We implemented the proposed framework in the ns-2 simulator, and carried out a simulation study to evaluate its performance with respect to fairness, service differentiation, loss and delay. The simulation results indicate that the proposed method enforces the per-device fairness, regardless of the number of devices present and regardless of the level of wireless link errors; furthermore it achieves high link utilization with only a small amount of frame losses.
  • Ngôn ngữ: English

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