Performance analysis of admission control for 802.11 wlan networks in ad hoc mode

AbstractTwo Admission Control schemes are investigated for wireless Local Area Networks (WLANs) in the context of the 802.11 standards. Every node handles the admission rules locally and the system can operate in ad hoc mode. Specically, two possible admission mechanisms are compared. The terminals operate in admission state when accessing the channel for the rst time and according to the number of collisions or the delay characteristics, block themselves in order to prevent the system from saturation. The second method is proved to provide a tighter admission performance. The analysis and simulation presented in this paper, show the improvement in quality when Voice over Internet Protocol (VoIP) applications contend for the common channel. The advantage of the proposed schemes is that they can be used without the need of an Access Point. I