Nowadays, 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. 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 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. 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 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. 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; analytical models; relevant data, theory, and methods; etc. that would be the valuable resources to the future researchers for the research on the Wi-Fi network.
翻译:摘要:如今,IEEE 802.11即Wi-Fi已成为宽带无线网络的主流技术。为了满足未来无线局域网的巨大需求增长,需要为Wi-Fi网络设计一种强大且高效的MAC协议。然而,传统的MAC机制由于某些固有限制并不适用于下一代通信。在这方面,OFDMA技术可用于设计Wi-Fi网络的有效MAC协议。本研究的目的是为Wi-Fi用户提供高速网络。论文提出了三个MAC协议,分别为HTFA(高吞吐量和公平访问),ERA(高效资源分配)和PRS(比例资源调度),并采用OFDMA技术。这些新协议使用最新的IEEE 802.11ax标准,即Wi-Fi 6,改进了Wi-Fi通信。特别是,这些协议改善了MAC协议的多个性能参数,如增加吞吐量,GOODPUT,公平指数,降低数据包重传率,碰撞等。仿真结果验证了新协议比现有协议更好。本文所设计的协议符合最新的IEEE 802.11ax标准,承诺每个用户至少提高四倍的吞吐量并支持十倍的用户。因此,在高密度环境中,新协议可确保不间断和流畅的通信。本论文包含许多资源,例如MAC协议的最新技术,现代协议及其性能矩阵的分析,Wi-Fi系统架构,OFDMA约束和规定,协议框架,分析模型,相关数据,理论和方法等,这将是未来研究Wi-Fi网络的宝贵资源。