Abstract
The performance of Wireless Local Area Network (WLAN) is highly dependent on the processes that are implemented in the Medium Access Control (MAC) sublayer regulated by the IEEE 802.11 standard. In turn, various parameters affect the performance of the MAC sublayer, the most important of which is the number of stations in the network and the offered load. With the massive growth of multimedia traffic, research of the network performance depending on traffic types is relevant. In this paper, we present the impact of a high-/low-priority traffic ratio on WLAN performance with different numbers of access categories. The simulation results show different impact of high-/low-priority traffic ratio on the performance of the MAC sublayer of wireless LANs depending on different network-sizes and on network conditions. Performance of the large network with two access categories and with the prevalent high-priority traffic is significantly higher than in the case of using four categories on the MAC sublayer. This allows us to conclude that the performance improvement of the large network with the prevalent high-priority traffic can be achieved by an adaptive adjustment of the access categories number on the MAC sublayer.
Highlights
Searching for new ways to improve Wireless Local Area Network (WLAN) performance is caused by a burst increase of Wi-Fi-enabled devices and intense growing demand for high-quality transmission of multimedia content
A simulated wireless network consists of wireless stations and an access point, which are located within the Basic Service Set (BSS), i.e., every station is able to detect a transmission from any other station
The impact of high-/low-priority traffic ratio on the Medium Access Control (MAC) sublayer performance of wireless LANs is different for different network sizes and depends on the network conditions
Summary
Searching for new ways to improve Wireless Local Area Network (WLAN) performance is caused by a burst increase of Wi-Fi-enabled devices and intense growing demand for high-quality transmission of multimedia content. WLAN uses a shared physical environment to exchange data between active devices. Each node in a network can claim to share a channel; one of the important problems of WLANs is controlling access to the physical environment. Using of a part of the network bandwidth to implement the CSMA/CA reduces a network bandwidth for transmission of subscriber traffic. This negatively affects wireless network performance, and improvement of accessing the physical environment methods of wireless computer networks plays an important role in the functioning of the Medium Access Control (MAC) sublayer
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