Precise Delay Analysis for IEEE 802.11 Legacy Ad-Hoc Networks

In recent years wireless local area networks constantly grew in popularity, mainly due to widely deployed IEEE 802.11 standards family. The number of applications that might benefit from those standards increases constantly. We witness this "all wireless" trend, where wireless connectivity is not just about Internet access any more. Numerous WLAN applications have emerged mobile VoIP telephony, positioning, vehicular ad hoc networks (VANET) to name just a few. In most cases certain performance parameters have to be kept to ensure applications\´ usability. Moreover, the more mobile an environment we deal with, the higher the constrains on link parameters are. The aim of our work was to test performance of 802.11b/g ad-hoc networks in terms of delay analysis in a link establishing process. Our experiments were held under different wireless link conditions to provide reliable results, using typical out-of-the-box IEEE 802.11b and 802.1g cards. To achieve that, we employed a precise scheduling software with several shell scripts, working under Linux OS.