Novel Multiple Access Protocol for Voice over IP in Wireless LAN
ISCC '02 Proceedings of the Seventh International Symposium on Computers and Communications (ISCC'02)
QShine '06 Proceedings of the 3rd international conference on Quality of service in heterogeneous wired/wireless networks
A differentiated service model for enhanced distributed channel access (EDCA) of IEEE 802.11e WLANs
Mobile Networks and Applications
Distributed mechanisms for quality of service in wireless LANs
IEEE Wireless Communications
IEEE 802.11e enhancement for voice service
IEEE Wireless Communications
IEEE 802.11 E QoS and power saving features overview and analysis of combined performance
IEEE Wireless Communications
Experimental evaluation of asymmetric QoS in IEEE 802.11g wireless networks
Proceedings of the 7th ACM symposium on QoS and security for wireless and mobile networks
Quality of experience enforcement in wireless networks
WWIC'10 Proceedings of the 8th international conference on Wired/Wireless Internet Communications
Differentiated service provisioning in the MAC layer of cognitive radio mesh networks
International Journal of Communication Networks and Distributed Systems
A MAC-Layer QoS Provisioning Protocol for Cognitive Radio Networks
Wireless Personal Communications: An International Journal
Voice Traffic Service Guarantee in Wireless Mesh Networks Based on IEEE 802.11e
International Journal of Business Data Communications and Networking
| Hi-index | 0.25 |
In this article we study the behavior of voice over IP traffic in IEEE 802.11 wireless networks. Specifically, we design a QoS provisioning mechanism for VoIP traffic, and propose a practical solution of configuring the 802.11e enhanced distributed control access parameter sets for different types of traffic. We show that media access control layer only methods may be insufficient, but the demonstrated cross-layer (layers 2, 3, and 4) method works simply and efficiently. We find that the EDCA parameter sets of the access point are not always necessarily set more aggressively than those of wireless stations even though the traffic load of AP is much heavier than the stations. With our mechanism, the EDCA parameter sets can be easily configured via software interface for off-the-shelf WiFi phone products, and there is no need to modify the operations of APs or 802.11 MAC layer protocols. The performance of our mechanism is evaluated via ns-2 simulations and via laboratory experiments over Quanta's O2 dual mode handsets. The results show our mechanism can provide effective and efficient QoS provisioning for VoIP traffic in IEEE 802.11 WLANs. Since the configuration may be readily configured in the field and the performance is robust across a wide range of environments, we believe that organizations deploying and operating WiFi networks for VoIP may benefit from our work and reduce or eliminate post-deployment tuning and debugging.