Cross-layer design of random access wireless networks

wireless networks;random access protocols;optimization;cross-layer design;Quality of Service (QoS)

Gao, Yan

关键词: wireless networks;    random access protocols;    optimization;    cross-layer design;    Quality of Service (QoS);   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/29695/Gao_Yan.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Interference is one of the foremost problems in wirelesscommunication which leads to various unique design challenges for wireless networks. Wireless medium access control (MAC) has to be specifically designed to resolve contention in the presence of interference. As a result, an important technique, the random access protocol, has emerged to address the contention issue. This protocol is the essential component in IEEE 802.11 MAC, which has become thede facto standard widely used in both WLANs and MANETs. This thesisfocuses on the random access protocol with emphasis on itsinteractions with other protocols across different layers, includingphysical layer, transport layer, networking layer and applicationlayer. We exploit several cross-layer interactions to optimize performance in random access based wireless networks. We address three design and analysis problems: a) joint congestion control and random access MAC for maximizing the network throughput in multi-hop wireless networks, b) joint power selection and random access MAC for maximizing the one-hop network throughput, and c) analysis of queuing delays in random access MAC based WLANs. We develop detailed models for each problem and then derive cross-layersolutions for optimizing performance by using various optimization techniques. Finally, each proposed solution is either verified by theoretical proofs or extensively studied by simulations.