Optimizing the Performance of IEEE 802.11b Wireless Local Area Network (WLAN) Using Discrete Event Simulation (DES) Model
Publication Date : 01/04/2019
Communication always attracts extensive research interest as it is a core part of modern communication technology. IEEE 802.11b has become common in recent years largely due to the advantage of user mobility, relatively low acquisition cost and ease of implementation making it common for both residential and business Internet access. However, the end user experience has often been less satisfactory than what the technology can offer. IEEE 802.11b wireless local area network (WLAN) is known to achieve relatively small throughput compared to other WLAN standards. The focus of this work is on improving IEEE 802.11b network performance. Quaternary key shifting modulation technique was used with discrete event simulation technique in Riverbed Modeller software to analyse the IEEE 802.11b network model and parameters. Results showed that when data rate was increased from 1Mbps to 11 Mbps which is the optimum value, throughput increased and there was 80% reduction in delay, retransmission attempts also decreased to approximately zero. Results also showed that when buffer size was increased from 1000bits to 12800bits which is also at optimum value, throughput increased by approximately 90% with no data dropped since it will take longer time for the buffer to be filled up and almost zero retransmission attempt was achieved. This work will go a long way in improving the Quality of Service of the IEEE 802.11b network leading to reduced cost of procurement and overhauling of devices in the network.
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