IMPROVING THE PERFORMANCE OF OFDMA-BASED WI-FI NETWORK WITH HYBRID MEDIUM ACCESS CONTROL PROTOCOL DESIGN
IMPROVING THE PERFORMANCE OF OFDMA-BASED WI-FI NETWORK WITH HYBRID MEDIUM ACCESS CONTROL PROTOCOL DESIGN
Résumé
Nowadays, the IEEE 802.11, i.e., Wi-Fi has emerged as a prevailing technology for broadband wireless networking. To meet the tremendous rise of demand for future generation wireless LANs, a robust and efficient MAC protocol is required for the Wi-Fi network. The acute rise of demand for high-speed wireless LANs has driven intensive research to improve the performance of MAC protocols leveraging a variety of MAC techniques. However, traditional MAC mechanisms are not suitable for next-generation communications due to some inherent constraints. In this regard, OFDMA technology could be adopted to design an efficient MAC protocol for the Wi-Fi network. The OFDMA technology supports multi-channel communications and hence ensures simultaneous communications between two or more users.
The purpose of this research is to provide a high-speed network for Wi-Fi users. The thesis presents three MAC protocols, namely, HTFA (High Throughput and Fair Access), ERA (Efficient Resource Allocation), and PRS (Proportional Resource Scheduling), by employing the OFDMA technology. The novel protocols improve Wi-Fi communication using the latest IEEE 802.11ax standard, i.e., Wi-Fi 6. In particular, the protocols improve several performance parameters of the MAC protocol, such as increasing the throughput, goodput, fairness index, and reducing the packet retransmissions, collisions, etc. The researcher designs the models and illustrates the working principles for the intended Wi-Fi protocols. The performance of the protocols is evaluated through comprehensive computer simulations using a powerful network simulator, i.e., NS-3. The saturation throughput is also measured effectively by constructing the analytical models. Simulation results validate that the new protocols are far better than the existing protocols.
The protocols designed in this thesis are compliant with the latest IEEE 802.11ax standard that promises to enhance the throughput (simply data rate) at least four times per user and support ten times users. Thus, the new protocols can ensure uninterrupted and smooth communication in highly dense environments (e.g., stations, airports, markets) where a large number of Wi-Fi users may need to send a massive volume of data concurrently. The thesis contains a lot of resources such as the state of the art of MAC protocols, analysis of contemporary protocols and their performance matrix; architecture of Wi-Fi system, OFDMA constraints and regulations; framework of protocols; relevant data, theory, and methods; analytical models; experimental results and analyses; etc. that would be the valuable resources to the future researchers for the research on the Wi-Fi network.
Nowadays, the IEEE 802.11, i.e., Wi-Fi has emerged as a prevailing technology for broadband wireless networking. To meet the tremendous rise of demand for future generation wireless LANs, a robust and efficient MAC protocol is required for the Wi-Fi network. The acute rise of demand for high-speed wireless LANs has driven intensive research to improve the performance of MAC protocols leveraging a variety of MAC techniques. However, traditional MAC mechanisms are not suitable for next-generation communications due to some inherent constraints. In this regard, OFDMA technology could be adopted to design an efficient MAC protocol for the Wi-Fi network. The OFDMA technology supports multi-channel communications and hence ensures simultaneous communications between two or more users.
The purpose of this research is to provide a high-speed network for Wi-Fi users. The thesis presents three MAC protocols, namely, HTFA (High Throughput and Fair Access), ERA (Efficient Resource Allocation), and PRS (Proportional Resource Scheduling), by employing the OFDMA technology. The novel protocols improve Wi-Fi communication using the latest IEEE 802.11ax standard, i.e., Wi-Fi 6. In particular, the protocols improve several performance parameters of the MAC protocol, such as increasing the throughput, goodput, fairness index, and reducing the packet retransmissions, collisions, etc. The researcher designs the models and illustrates the working principles for the intended Wi-Fi protocols. The performance of the protocols is evaluated through comprehensive computer simulations using a powerful network simulator, i.e., NS-3. The saturation throughput is also measured effectively by constructing the analytical models. Simulation results validate that the new protocols are far better than the existing protocols.
The protocols designed in this thesis are compliant with the latest IEEE 802.11ax standard that promises to enhance the throughput (simply data rate) at least four times per user and support ten times users. Thus, the new protocols can ensure uninterrupted and smooth communication in highly dense environments (e.g., stations, airports, markets) where a large number of Wi-Fi users may need to send a massive volume of data concurrently. The thesis contains a lot of resources such as the state of the art of MAC protocols, analysis of contemporary protocols and their performance matrix; architecture of Wi-Fi system, OFDMA constraints and regulations; framework of protocols; relevant data, theory, and methods; analytical models; experimental results and analyses; etc. that would be the valuable resources to the future researchers for the research on the Wi-Fi network.
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