"Using an Extended Anomaly Model to Provide RSVP-based QOS in Wireless-LANs", The 17th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC'06), Helsinki (Finland), 2006
Dipl.-Ing. René Böringer
Prof. Dr.-Ing. habil. Andreas Mitschele-Thiel
- The anomaly of WLAN causes a lot of challenges in terms of Quality of Service (QoS) on the wireless link and thus constricts the rollout of new applications and services. The anomaly means that the effective throughput of a WLAN
client always depends on the other clients in its cell. This paper describes how to predict the throughput in a WLAN cell based on the number of clients in this cell and their specific Automatic Rate Selection (ARS) rates. Therefore an extended Anomaly model is used to compute the
throughput at the time. Afterwards it is shown in which way the computed maximum throughput can be used in conjunction with the classical RSVP mechanisms to ensure QoS. The approach is evaluated by a simulation and by a Linux-based implementation in the Wireless Lab as well. Our approach allows providing Voice over WLAN (VoWLAN) services even if the mobile clients do not support standardized QoS mechanisms like IEEE 802.11e.