Title :
A Practical Cross-layer QoS Mechanism for Voice over IP in IEEE 802.11e WLANs
Author :
Lee, Jeng Farn ; Chen, Jie-Ming ; Liao, Wanjiun ; Lee, Hsiu-Hui ; Chen, Meng Chang
Abstract :
In this paper, we study the behavior of voice over IP (VoIP) traffic over IEEE 802.11 wireless networks. Specifically, we propose a QoS provisioning mechanism for VoIP traffic, and suggest a practical solution to configuring the 802.lie enhanced distributed control access (EDCA) parameter sets for different types of traffic. With our mechanism, the EDCA parameter sets can be easily configured via software interface in off-the-shelf WiFi phone products and it is not required to modify the operations of access points or 802.11 MAC layer protocols. The performance of our mechanism is evaluated via ns-2 simulations and via laboratory experiments over Quanta´s 02 dual-mode handsets. The results show our mechanism can provide effective and efficient QoS provisioning for VoIP traffic over IEEE 802.11 WLANs.
Keywords :
Internet telephony; quality of service; telecommunication traffic; wireless LAN; IEEE 802.11 wireless networks; IEEE 802.11e WLAN; QoS provisioning mechanism; VoIP traffic; Voice over IP; WiFi phone products; cross-layer QoS mechanism; enhanced distributed control access; software interface; Access protocols; Bandwidth; Communication system traffic control; Downlink; Information science; Internet telephony; Laboratories; Telecommunication traffic; Telephone sets; Traffic control; EDCA; QoS; VoIP; strict priority;
Conference_Titel :
Multimedia and Expo, 2007 IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
1-4244-1016-9
Electronic_ISBN :
1-4244-1017-7
DOI :
10.1109/ICME.2007.4284838
