Improving the Performance of Wireless Networks with Ubiquitously Compatible Solutions in the Medium Access Control Layer

Wireless networks have been widely adopted in homes, offices and public hot spots. Two problems with wireless networks are the limited range and unavoidable packet loss. Much effort has been investigated in these problems, such as packet relaying based on node cooperation and diagnosing the cause of...

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Other Authors: Zhou, Shuaiyuan (authoraut)
Format: Others
Language:English
English
Published: Florida State University
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Online Access:http://purl.flvc.org/fsu/fd/FSU_migr_etd-9124
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spelling ndltd-fsu.edu-oai-fsu.digital.flvc.org-fsu_2545282020-06-20T03:09:31Z Improving the Performance of Wireless Networks with Ubiquitously Compatible Solutions in the Medium Access Control Layer Zhou, Shuaiyuan (authoraut) Zhang, Zhenghao (professor directing dissertation) Yu, Ming (university representative) Aggarwal, Sudhir (committee member) Yuan, Xin (committee member) Department of Computer Science (degree granting department) Florida State University (degree granting institution) Text text Florida State University Florida State University English eng 1 online resource computer application/pdf Wireless networks have been widely adopted in homes, offices and public hot spots. Two problems with wireless networks are the limited range and unavoidable packet loss. Much effort has been investigated in these problems, such as packet relaying based on node cooperation and diagnosing the cause of a packet loss; these existing solutions require modifications either to both the packet transmitter and receiver or to the physical layer. We revisit the problems and propose ubiquitously compatible solutions in medium access control layer - L2Relay and Locora. L2Relay is a layer 2 packet relay protocol that can improve the performance and extend the range of the network. A L2Relay device overhears the packet transmissions and may retransmit a packet on behalf of the access point or the node if no ACK is overheard and if it is in a better position to retransmit the packet than the original sender. L2Relay exploits many layer 2 functionalities such as carrier sense. L2Relay encompasses unique solutions to link quality measurement, rate adaptation, relayer selection, while maintaining low overhead. One important feature of L2Relay is its ubiquitous compatibility, i.e., it is compatible with any Wi-Fi devices, such that one or multiple relayers can be installed in any network easily without any modifications to the AP or nodes. Locora, which stands for Loss Cause Oracle, is a system that can help a Wi-Fi device achieve higher performance by diagnosing the actual cause of the packet loss and taking correct response upon packet loss with only local information observable by the packet sender. Locora uses novel methods to estimate the collision level, the channel change, and the hidden terminal activities, such that it can react to packet loss with suitable responses to improve the efficiency. One notable feature of Locora is its single-point upgradability. By making the decisions with only local observation, Locora enables the users to enjoy the performance gain by modifying only one end of the wireless link, i.e., upgrading only one device, which makes the deployment much simpler. L2Relay and Locora are solutions of low complexity that are implementable in firmware level. We implemented both solutions in the OpenFWWF platform. Our experiments show that L2Relay and Locora can lead to higher performance. A Dissertation submitted to the Department of Computer Science in partial fulfillment of the requirements for the degree of Doctor of Philosophy. Summer Semester, 2014. July 18, 2014. Includes bibliographical references. Zhenghao Zhang, Professor Directing Dissertation; Ming Yu, University Representative; Sudhir Aggarwal, Committee Member; Xin Yuan, Committee Member. Computer science FSU_migr_etd-9124 http://purl.flvc.org/fsu/fd/FSU_migr_etd-9124 This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them. http://diginole.lib.fsu.edu/islandora/object/fsu%3A254528/datastream/TN/view/Improving%20the%20Performance%20of%20Wireless%20Networks%20with%20Ubiquitously%20Compatible%20Solutions%20in%20the%20Medium%20Access%20Control%20%20%20%20%20%20%20%20%20%20Layer.jpg
collection NDLTD
language English
English
format Others
sources NDLTD
topic Computer science
spellingShingle Computer science
Improving the Performance of Wireless Networks with Ubiquitously Compatible Solutions in the Medium Access Control Layer
description Wireless networks have been widely adopted in homes, offices and public hot spots. Two problems with wireless networks are the limited range and unavoidable packet loss. Much effort has been investigated in these problems, such as packet relaying based on node cooperation and diagnosing the cause of a packet loss; these existing solutions require modifications either to both the packet transmitter and receiver or to the physical layer. We revisit the problems and propose ubiquitously compatible solutions in medium access control layer - L2Relay and Locora. L2Relay is a layer 2 packet relay protocol that can improve the performance and extend the range of the network. A L2Relay device overhears the packet transmissions and may retransmit a packet on behalf of the access point or the node if no ACK is overheard and if it is in a better position to retransmit the packet than the original sender. L2Relay exploits many layer 2 functionalities such as carrier sense. L2Relay encompasses unique solutions to link quality measurement, rate adaptation, relayer selection, while maintaining low overhead. One important feature of L2Relay is its ubiquitous compatibility, i.e., it is compatible with any Wi-Fi devices, such that one or multiple relayers can be installed in any network easily without any modifications to the AP or nodes. Locora, which stands for Loss Cause Oracle, is a system that can help a Wi-Fi device achieve higher performance by diagnosing the actual cause of the packet loss and taking correct response upon packet loss with only local information observable by the packet sender. Locora uses novel methods to estimate the collision level, the channel change, and the hidden terminal activities, such that it can react to packet loss with suitable responses to improve the efficiency. One notable feature of Locora is its single-point upgradability. By making the decisions with only local observation, Locora enables the users to enjoy the performance gain by modifying only one end of the wireless link, i.e., upgrading only one device, which makes the deployment much simpler. L2Relay and Locora are solutions of low complexity that are implementable in firmware level. We implemented both solutions in the OpenFWWF platform. Our experiments show that L2Relay and Locora can lead to higher performance. === A Dissertation submitted to the Department of Computer Science in partial fulfillment of the requirements for the degree of Doctor of Philosophy. === Summer Semester, 2014. === July 18, 2014. === Includes bibliographical references. === Zhenghao Zhang, Professor Directing Dissertation; Ming Yu, University Representative; Sudhir Aggarwal, Committee Member; Xin Yuan, Committee Member.
author2 Zhou, Shuaiyuan (authoraut)
author_facet Zhou, Shuaiyuan (authoraut)
title Improving the Performance of Wireless Networks with Ubiquitously Compatible Solutions in the Medium Access Control Layer
title_short Improving the Performance of Wireless Networks with Ubiquitously Compatible Solutions in the Medium Access Control Layer
title_full Improving the Performance of Wireless Networks with Ubiquitously Compatible Solutions in the Medium Access Control Layer
title_fullStr Improving the Performance of Wireless Networks with Ubiquitously Compatible Solutions in the Medium Access Control Layer
title_full_unstemmed Improving the Performance of Wireless Networks with Ubiquitously Compatible Solutions in the Medium Access Control Layer
title_sort improving the performance of wireless networks with ubiquitously compatible solutions in the medium access control layer
publisher Florida State University
url http://purl.flvc.org/fsu/fd/FSU_migr_etd-9124
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