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Comparison of Modified Dual Queue and EDCA for VoIP Over IEEE 802.11 WLAN
Overview The popular IEEE 802.11 WLAN today does not provide any Quality-of-Service (QoS) because of its contention-based channel access nature of the Medium Access Control (MAC). Therefore, this paper proposes a simple software upgrade-based solution, called a dual queue scheme, to provide QoS to real-time services such as Voice-over-IP (VoIP) in the previous work. The dual queue scheme operates on top of the legacy MAC. This paper presents a Modified Dual Queue (MDQ) scheme by considering a practical implementation limitation. On the other hand, the emerging 802.11e MAC includes a contention-based channel access mechanism, called Enhanced Distributed Channel Access (EDCA). Prioritized channel accesses are provided to different traffic classes under EDCA.
| Publisher | Seoul National University | File Format | |
|---|---|---|---|
| Date Published | March 2006 | ||
| Format | White Papers | ||
| Topics | |||
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