QoS simulating of wireless network in OPNET

The aim of this bachelor work is project and simulation of wireless network with the Quality of Service (QoS) support. It is composed of two parts, the theoretical and the practical one. In the first part there are analyzed findings needed for understanding the existing problems. The second part describes project in detail and setup of network. The theoretical part presents division and format of wireless networks, especially Wi-Fi settings, which is defined by IEEE 802.11 standard. The biggest attention is paid to IEEE 802. 11e standard, which improves the so-called Media Access control MAC (sublayer of line layer) with extension of the QoS (Quality of Service) support in wireless local networks. This standard is important for delay sensitive applications like Voice over Wireless IP and current multimedia. The practical part describes design of wireless network in Opnet Modeler settings and configurations of particular components for the right utility. The required quality of service (QoS) support is achieved by authorization of HCF (Hybrid Coordination Function) protocol at all operating stations and AP access points. It was necessary to make two models. First of them supported the QoS service. On the other hand the same service was inaccessible for the second one. Statistics are made by comparison of final graphs of these two models