Dissertations / Theses: 'IEEE 80211 (Standard)'

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Boom, Derrick D. "Denial of service vulnerabilities in IEEE 802.16 wireless networks." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Sep%5FBoom.pdf.

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Chan, Hsiung Wei Roy. "Performance analysis of IEEE 802.11A signals under different operational environments." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Sept%5FChan.pdf.

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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, Sept. 2004.
Thesis advisor(s): Tri T. Ha, Randy L. Borchardt. Includes bibliographical references (p. 89). Also available online.

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Baalaji, Venkateshwaraiyer S. "Wireless tool kit for hand held devices." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Sept%5FBaalaji%5FCS.pdf.

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Ozan, Orhan. "Denial of service attacks on 802.1X security protocol." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FOzan.pdf.

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Russo, Joseph Anthony. "Test and evaluation of meshdynamics 802.11 multi-radio mesh modules in support of coalition riverine operations." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Jun%5FRusso.pdf.

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Thesis (M.S. in Systems Technology (Command, Control and Communications (C3)))--Naval Postgraduate School, June 2006.
Thesis Advisor(s): James Ehlert. "June 2006." Includes bibliographical references (p.199-201). Also available in print.

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Baalaji, Venkateshwaraiyer S. "Collaborative services in an ad hoc wireless network." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Sep%5FBaalaji%5FITM.pdf.

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Thesis (M.S. in Information Technology Management)--Naval Postgraduate School, Sept. 2004.
Thesis advisor(s): Alex Bordetsky, Gurminder Singh. Includes bibliographical references (p. 71). Also available online.

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Manso, Rogerio C. "Performance analysis of M-QAM with Viterbi soft-decision decoding." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FManso.pdf.

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Lowham, Keith D. "Synchronization analysis and simulation of a standard IEEE 802.11g OFDM signal." Thesis, Monterey, California. Naval Postgraduate School, 2004. http://hdl.handle.net/10945/1652.

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Synchronization of orthogonal frequency-division multiplexed (OFDM) signals is significantly more difficult than synchronization of a single-carrier system. The recently approved IEEE Standard 802.11g specifies a packet-based OFDM system that provides a basis for the discussion of OFDM synchronization in a packet-based environment. Algorithms that synchronize the receiver carrier demodulation frequency and phase, the data frame, the OFDM symbol timing, and the data symbol timing are discussed and analyzed in an AWGN channel. System View simulation is used to implement the frame and carrier frequency synchronization algorithms, where the performance of these algorithms is analyzed and they are shown to be useful detection algorithms for Standard 802.11g signal reception.
Lieutenant Commander, United States Navy

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Munoz, Ramon J., and Robert J. Guice. "IEEE 802.16 Commercial Off The Shelf (COTS) technologies as a compliment to Ship To Objective Maneuver (STOM) communications." Thesis, Monterey, California. Naval Postgraduate School, 2004. http://hdl.handle.net/10945/1417.

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This research evaluates the IEEE 802.16 standards and technologies that are currently being developed in the commercial sector. The robust capability of this standard lends itself potentially to numerous military applications. This research explores how this technology might address the shortcomings of existing military radio and data systems; specifically, with respect to the issues surrounding the Ship to Objective Maneuver (STOM) communications. The intent of this research is to provide recommendations on the necessary 'adapt from COTS' changes for this technology to address STOM networking requirements. This research includes discussions on the military requirements for an IEEE 802.16 adapted waveform. The requirements are for the IEEE 802.16 'adapt from COTS' are derived from researched on the Concept of Employment for STOM operations and the specification of the Joint Tactical Radio Systems (JTRS) Wideband Networking Waveform (WNW). These discussions offer an illustration of the complex networking demands the COTS adapted systems would need to address. Through detailed exploration of the current IEEE 802.16 standards and implementation testing with pre-standard IEEE 802.16a equipment, we were able to make recommendations on the COTS adaptations necessary to make IEEE 802.16 suitable as a complimentary technology within the STOM scenario.
Captain, United States Marine Corps

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Oh, Khoon Wee. "Wireless network security : design considerations for an enterprise network /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Dec%5FOh.pdf.

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Fickel, Mark G., and Eric J. Bach. "An analysis of the feasibility and applicability of IEEE 802.X wireless mesh networks within the Global Information Grid." Thesis, Monterey California. Naval Postgraduate School, 2004. http://hdl.handle.net/10945/1462.

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This thesis analyzes the feasibility, functionality, efficacy and usability of IEEE 802.x wireless mesh networks in multiple DoD contexts. Through multiple field and lab experiments and hardware investigations, an assessment is performed on the realistic implementation issues of wireless mesh networks and their possible applications. A detailed examination is conducted of the variable elements, operational constraints, and possible decision points for developing a usable, robust, self-organizing, wireless mesh network that can be leveraged for maximum usability and shared situational awareness in network-centric operations. The research investigates the suitability of currently available COTS hardware and software wireless mesh networking components for geographically distributed networks. Additionally, a product-line software architecture and a common data interchange XML vocabulary are proposed as the enabling technology elements to carry application layer mesh forward for integration of collaborative sensor-decision maker adaptive networks within the Global Information Grid. The thesis includes the design and implementation of the first Naval Postgraduate School testbed for tactical level mesh networking with unmanned vehicles, unattended sensors, and warrior networking nodes. This thesis also lays the groundwork for further research into lower OSI-layer routing protocols for DoD mesh networks, development of mesh-aware applications, as well as a GIG-wide mesh network architecture.
Lieutenant Commander, Supply Corps, United States Navy
Lieutenant Commander, United States Navy

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Lancaster, David D. "Developing a Fly-Away Kit (FLAK) to support Hastily Formed Networks (HFN) for Humanitarian Assistance and Disaster Relief (HA/DR) /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Jun%5FLancaster.pdf.

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Kerdsri, Jiradett. "SNMP over Wi-Fi wireless networks." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FKerdsri.pdf.

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Thesis (M.S. in Computer Science)--Naval Postgraduate School, March 2003.
Thesis advisor(s): Ted Lewis, Geoffrey Xie, Gurminder Singh. Includes bibliographical references (p. 89). Also available online.

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Varelas, Antonios K. "An investigation of wireless solutions for the "Last Mile"." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FVarelas.pdf.

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Thesis (M.S. in Computer Science and M.S. in Electrical Engineering)--Naval Postgraduate School, March 2004.
Thesis advisor(s): Gilbert M. Lundy, Roberto Cristi. Includes bibliographical references (p. 95-97). Also available online.

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Davis, Joseph A. Sr. "An analysis of network and sensor performance within IEEE 802.x wireless MESH networks in the Tactical Network Topology (TNT)." Thesis, Monterey California. Naval Postgraduate School, 2005. http://hdl.handle.net/10945/2297.

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The objective of this research is to analyze the network performance and sensor functionality, efficacy and usability of IEEE 802.x wireless MESH networks within a DoD Tactical network environment. Multiple sensor configurations operating with wireless MESH network technologies will be researched and analyzed for performance in expeditionary environment situations. Specifically, this thesis will attempt establish the foundation for the development of wireless MESH "network health" models by examining the performance of sensors operating within a MESH network and define which network performance metrics equate to good quality of service. This research will experiment with different application, sensor, and network configurations of currently available COTS components, such as, voice, video and data hardware. This thesis will lay the groundwork for wireless network MESH predictability, which will enable the optimal use of sensors within a tactical network environment.
Lieutenant Commander, United States Navy

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Onder, Hulusi. "Session hijacking attacks in wireless local area networks." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FOnder.pdf.

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Herzig, Joseph F. Jr. "An analysis of the feasibility of implementing ultra wideband and mesh network technology in support of military operations." Thesis, Monterey California. Naval Postgraduate School, 2005. http://hdl.handle.net/10945/2285.

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This thesis analyzes the feasibility, functionality, and usability of Ultra Wideband technology as an alternative to 802.11 in wireless mesh networks for multiple DoD contexts. Ultra wideband and wireless mesh network technologies and applications are researched and analyzed through multiple field and lab experiments for usability in current, real-world situations. Hardware and software investigations are conducted to determine any implementation issues between ultra wideband and wireless mesh networks. A detailed assessment is conducted of the various elements and operational constraints for developing an ultra wideband mesh network that can be utilized to improve situational awareness in network-centric operations. Through joint research with Lawrence Livermore National Laboratories, various hardware and software components are developed to create a test bed for tactical level ultra wideband and mesh networking experimentation in a highly mobile environment. This thesis also lays the groundwork into future ultra wideband and mesh networking applications.
Lieutenant, United States Navy

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Milicic, Gregory J. "Analysis of hardware requirements for airborne tactical mesh networking nodes." Thesis, Monterey California. Naval Postgraduate School, 2005. http://hdl.handle.net/10945/2218.

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Wireless mesh mobile ad hoc networks (MANETs) provide the military with the opportunity to spread information superiority to the tactical battlespace in support of network-centric warfare (NCW). These mesh networks provide the tactical networking framework for providing improved situational awareness through ubiquitous sharing of information including remote sensor and targeting data. The Naval Postgraduate School's Tactical Network Topology (TNT) project sponsored by US Special Operations Command seeks to adapt commercial off the shelf (COTS) information technology for use in military operational environments. These TNT experiments rely on a variety of airborne nodes including tethered balloon and UAVs such as the Tern to provide reachback from nodes on the ground to the Tactical Operations Center (TOC) as well as to simulate the information and traffic streams expected from UAVs conducting surveillance missions and fixed persistent sensor nodes. Airborne mesh nodes have unique requirements that can be implemented with COTS technology including single board computers and compact flash.
Lieutenant, United States Navy

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Klopson, Jadon E., and Stephen V. Burdian. "Collaborative applications used in a wireless environment at sea for use in Coast Guard Law Enforcement and Homeland Security missions." Thesis, Monterey, California. Naval Postgraduate School, 2005. http://hdl.handle.net/10945/2311.

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This thesis analyzes the potential impact of incorporating wireless technologies, specifically an 802.11 mesh layer architecture and 802.16 Orthogonal Frequency Division Multiplexing, in order to effectively and more efficiently transmit data and create a symbiotic operational picture between Coast Guard Cutters, their boarding teams, Coast Guard Operation Centers, and various external agencies. Two distinct collaborative software programs, Groove Virtual Office and the Naval Postgraduate School's Situational Awareness Agent, are utilized over the Tactical Mesh and OFDM network configurations to improve the Common Operating Picture of involved units within a marine environment to evaluate their potential impact for the Coast Guard. This is being done to increase the effectiveness and efficiency of Coast Guard units while they carry out their Law Enforcement and Homeland Security Missions. Through multiple field experiments, including Tactical Network Topology and nuclear component sensing with Lawrence Livermore National Laboratory, we utilize commercial off the shelf (COTS) equipment and software to evaluate their impact on these missions.
Lieutenant Commander, United States Coast Guard
Lieutenant, United States Coast Guard

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Lowham, Keith D. "Synchronization analysis and simulation of a stand IEEE 802.11g OFDM signal /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FLowham.pdf.

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Yan, Yong. "Performance analysis and improvement of IEEE 802.11 protocols." HKBU Institutional Repository, 2010. http://repository.hkbu.edu.hk/etd_ra/1222.

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Švanda, Pavel. "Nástroj pro generování rámců podle standardu 802.11." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2013. http://www.nusl.cz/ntk/nusl-236215.

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This thesis describes the design and implementation of the generator frames used for information transfer in wireless networks. At the beginning of the thesis there is described the introduction to the issue of data transmission in wireless networks 802.11 and the analysis of existing tools. Then it is designed language for describing the structure of their own frames and designed their own tools. The work also deals with the subsequent implementation of the resulting tool. Finally the results of the test are mentioned.

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Wu, Shaoen Biaz Saad. "High performance rate adaptation on IEEE 802.11 networks." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SUMMER/Computer_Science_and_Software_Engineering/Dissertation/Wu_Shaoen_34.pdf.

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Ge, Ye. "QoS provisioning for IEEE 802.11 MAC protocols." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1095441321.

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Thesis (Ph. D.)--Ohio State University, 2004.
Title from first page of PDF file. Document formatted into pages; contains xiii, 97 p.; also includes graphics (some col.). Includes bibliographical references (p. 94-97).

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Xiong, Lixiang. "A Markov chain approach to IEEE 802.11 WLAN performance analysis." Connect to full text, 2008. http://ses.library.usyd.edu.au/handle/2123/3679.

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Thesis (Ph. D.)--University of Sydney, 2008.
Includes tables. Includes list of publications. Title from title screen (viewed October 30, 2008). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Electrical and Information Engineering, Faculty of Engineering and Information Technologies. Includes bibliographical references. Also available in print form.

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Allen, Jared L. "Performance analysis of 802.61a." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Jun%5FAllen.pdf.

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Hochstedler, Robert A. "Implementation of a modular Fly away Kits (FLAK) for C4ISR in order to counter asymmetric threats in the coalition riverine and maritime theatres." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Jun%5FHochstedler.pdf.

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Thesis (M.S. in Systems Technology (Command, Control and Communications (C3))--Naval Postgraduate School, June 2006.
Thesis Advisor(s): James F. Ehlert. "June 2006" Includes bibliographical references (p. 119-121). Also available in print.

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Deason, Russell C. "Wireless local network architecture for Naval medical treatment facilities." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Sept%5FDeason.pdf.

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Thesis (M.S. in Information Technology Management)--Naval Postgraduate School, Sept. 2004.
Thesis advisor(s): Alex Bordetsky. Includes bibliographical references (p. 89-93, 95-99). Also available online.

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Tan, Boon Hwee. "Defending IEEE 802.11-based networks against denial of service attacks /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Dec%5FTan%5FB.pdf.

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Li, Yi, and 李禕. "Efficient power management for infrastructure-based IEEE 802.11 WLANs." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2015. http://hdl.handle.net/10722/208589.

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Almost all mobile devices nowadays are enabled with IEEE 802.11 Wireless Local Area Network (WLAN), which is also known as WiFi. One of the most important considerations when choosing an 802.11 device is its battery life. To allow mobile devices to conserve energy, IEEE 802.11 standard specifies a power save mode (PSM). A station/device in PSM, i.e. PSM-STA, will wake up at a predefined listen interval (LI) to receive frames buffered at the access point (AP) while it is sleeping. In this thesis, we focus on enhancing the basic PSM mechanisms in the standard. In particular, two new power saving schemes, delayed wakeup and dynamic listen interval, are proposed. Unlike many existing schemes, our schemes are fully standard compliant, and legacy devices can support them via a firmware upgrade. In our delayed wakeup (DW) scheme, we assume that all PSM-STAs use the same listen interval of one. That is all PSM-STAs wake up at every beacon frame broadcast, or beacon interval (BI). From the traffic indication map (TIM) in the beacon, a PSMSTA learns if there are any buffered frames at AP. If yes, it will stay awake until all buffered frames are retrieved. This creates a rush hour on the shared channel right after a beacon broadcast. If the channel is congested, having all PSM-STAs staying awake will not improve the system delay performance but consume more power. Aiming at saving battery power while not affecting delay-throughput performance, our DWscheme divides a BI into n sub-BIs. Then based on the amount of buffered frames, AP identifies and instructs “excess” stations to sleep immediately and wake up at a non-congested sub-BI later on. “Instructions” are judiciously encoded inside the modified TIM. We show that our modifications are fully transparent to legacy stations. In order to more accurately identify the amount of excess stations, an analytical model is also constructed to derive the saturated throughput of a WLAN consisting of PSM-STAs. In our dynamic listen interval (DLI) scheme, we aim at minimizing unnecessary wakeups while without sacrificing delay performance. Note that when a PSM-STA wakes up to receive a beacon and found that there are no buffered frames at AP, the PSM-STA experiences an unnecessary wakeup. Accordingly, the associated mode transition energy is wasted. According to the IEEE 802.11 standard, each STA chooses its fixed LI at the time of association. If LI=1, a STA wakes up at every beacon interval (as that in DW scheme). Although packet delay is minimized in this case, the chance of unnecessary wakeups can be high. On the other hand, a larger LI can reduce the chance of unnecessary wakeups but the delay will be increased. Our DLI scheme addresses this problem by dynamically adjusting the LI value according to traffic load. Specifically, each unnecessary wakeup will increase a STA’s LI by one, and a necessary wakeup will immediately reset LI to one. Simulations show that when traffic is bursty, mode transition energy consumption can be reduced without noticeable degradation in delay performance.
published_or_final_version
Electrical and Electronic Engineering
Master
Master of Philosophy

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Endrle, Pavel. "Zabezpečení standardu 802.11 a jeho možnosti." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218184.

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This master´s thesis is about 802.11 standard security techniques and their features. Particular types of this standard and its features are shown in the introduction. Wireless network security cypher alghoritm types, their features, weaknesses and principles of functions are closely described in next few chapters. Realized attacks on these security alghoritms with their principles are described and shown in the practical part of thesis. One chapter is about effectivity, accessibility and practicability valorization of these attacks in practice.

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Al-Ghazu, Nader. "A Study of the Next WLAN Standard IEEE 802.11ac Physical Layer." Thesis, KTH, Signalbehandling, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-133768.

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This thesis studies the Physical Layer (PHY) of the new IEEE 802.11acWireless Local Access Network (WLAN) standard. The 11ac is built basedon the 11n successful standard. The standard is expected to be completedby the end of 2013. And it promises a Very High Throughput (VHT),and robust communication. In order to achieve that, the 11ac uses morebandwidth, it employs higher numbers of Multiple-Input Multiple-Output(MIMO) spatial streams, and higher orders of modulations. The 11ac PHYframe structure is studied in details. The transmitter and receiver blocks areexplained and implemented by MATLAB. Bit Error Rate (BER) and ErrorVector Magnitude (EVM) simulations of the PHY were run. The effectof different Modulation and Coding Scheme (MCS), and bandwidths werestudied. The performance of MIMO and Space-Time Block Coding (STBC)was investigated. The simulation results shows how the 11ac benefits fromthe new employed features. The created MATLAB simulation program canbe used for further tests and research.

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Paruchuri, Ravi Chandra Agrawal Prathima. "Perfomance analysis of 802.11b networks." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Spring/master's/PARUCHURI_RAVI-CHANDRA_20.pdf.

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Fan, Wing Fai. "Admission control and scheduling for guarantee the packet loss rate and delay in IEEE 802.11e WLANs /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?ELEC%202004%20FAN.

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Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2004.
Includes bibliographical references (leaves 63-66). Also available in electronic version. Access restricted to campus users.

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Janse, van Rensburg Johanna Hendrina. "An investigation into the deployment of IEEE 802.11 networks." Thesis, Rhodes University, 2007. http://eprints.ru.ac.za/860/.

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Garcia, Torre Fernando. "Investigation of IEEE Standard 802.11 Medium Access Control (MAC) Layer in ad-hoc." Thesis, Linköping University, Department of Electrical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-6908.

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This thesis involved a research of mechanisms of MAC layer in the ad-hoc networks environment, the ad-hoc networks in the terminology of the standard are called IBSS Independent Basic Service, these type of networks are very useful in real situation where there are not the possibility of display a infrastructure, when there isn’t a network previous planning.

The connection to a new network is one of the different with the most common type of Wireless Local Area Networks (WLAN) that are the ones with infrastructure. The connection is established without the presence of a central station, instead the stations discover the others with broadcast messages in the coverage area of each station. In the context of standard 802.11 networks the communication between the stations is peer to peer, only with one hop. To continue with initiation process is necessary the synchronization between the different stations of his timers.

The other capital mechanism that is treated is the medium access mechanism, to hold a shared and unreliable medium, all the heavy of this issue goes to the distributed coordination function DCF.

In this moment there is an emergent technology, WIMAX or standard IEEE 802.16, like the standard 802.11 is a wireless communication protocol. Some comparison between the MAC layer mechanisms would be realized between these two standards

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Park, Sangtae. "Optimal Access Point Selection and Channel Assignment in IEEE 802.11 Networks." Thesis, University of North Texas, 2004. https://digital.library.unt.edu/ark:/67531/metadc4687/.

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Designing 802.11 wireless networks includes two major components: selection of access points (APs) in the demand areas and assignment of radio frequencies to each AP. Coverage and capacity are some key issues when placing APs in a demand area. APs need to cover all users. A user is considered covered if the power received from its corresponding AP is greater than a given threshold. Moreover, from a capacity standpoint, APs need to provide certain minimum bandwidth to users located in the coverage area. A major challenge in designing wireless networks is the frequency assignment problem. The 802.11 wireless LANs operate in the unlicensed ISM frequency, and all APs share the same frequency. As a result, as 802.11 APs become widely deployed, they start to interfere with each other and degrade network throughput. In consequence, efficient assignment of channels becomes necessary to avoid and minimize interference. In this work, an optimal AP selection was developed by balancing traffic load. An optimization problem was formulated that minimizes heavy congestion. As a result, APs in wireless LANs will have well distributed traffic loads, which maximize the throughput of the network. The channel assignment algorithm was designed by minimizing channel interference between APs. The optimization algorithm assigns channels in such a way that minimizes co-channel and adjacent channel interference resulting in higher throughput.

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Kong, Zhenning. "MAC layer performance analysis and improvement and QoS enhancement for IEEE 802.11 wireless LANs /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?ELEC%202004%20KONG.

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Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2004.
Includes bibliographical references (leaves 108-112). Also available in electronic version. Access restricted to campus users.

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Almantheri, Hamed. "Computer wireless networks : a design plan for building wireless networks using IEEE 802.11 standard." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FAlmantheri.pdf.

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Chiu, Chin-Yung. "Broadband CMOS power amplifier for IEEE 802.11 a/b/g wireless LAN transmitters." Columbus, Ohio : Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1133298874.

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Klopson, Jadon E. Burdian Stephen V. "Collaborative applications used in a wireless environment at sea for use in Coast Guard Law Enforcement and Homeland Security missions /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Mar%5FKlopson.pdf.

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Kamath, Vikram V. "An approach to increase channel utilization in the IEEE 802.11 networks by improving fairness at the medium access control sub-layer." Fairfax, VA : George Mason University, 2008. http://hdl.handle.net/1920/3406.

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Thesis (M.S.)--George Mason University, 2008.
Vita: p. 55. Thesis director: Bijan Jabbari. Submitted in partial fulfillment of the requirements for the degree of Master of Science in Electrical Engineering. Title from PDF t.p. (viewed Mar. 17, 2009). Includes bibliographical references (p. 53-54). Also issued in print.

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Lim, Christopher. "Optimizing access radio in multi-radio mesh network /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?CSED%202009%20LIM.

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Narisetti, Mary. "Implementation of vertical handoff algorithm between IEEE 802.11 WLAN and CDMA cellular network." unrestricted, 2005. http://etd.gsu.edu/theses/available/etd-07202006-181806/.

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Thesis (M.S.)--Georgia State University, 2005.
Title from title screen. Yi Pan, committee chair; Anu G. Bourgeois, A. P. Preethy, committee members. Electronic text (84 p. : i;;. (some col.)) : digital, PDF file. Description based on contents viewed July 2, 2007. Includes bibliographical references (p. 67-68).

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Dhoutaut, Dominique Ubéda Stéphane Guérin-Lassous Isabelle. "Etude du standard IEEE 802.11 dans le cadre des réseaux ad hoc de la simulation à l'expérimentation /." Villeurbanne : Doc'INSA, 2005. http://docinsa.insa-lyon.fr/these/pont.php?id=dhoutaut.

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Chousidis, Christos. "Wireless audio networking modifying the IEEE 802.11 standard to handle multi-channel real-time wireless audio networks." Thesis, Brunel University, 2014. http://bura.brunel.ac.uk/handle/2438/9310.

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Audio networking is a rapidly increasing field which introduces new exiting possibilities for the professional audio industry. When well established, it will drastically change the way live sound systems will be designed, built and used. Today's networks have enough bandwidth that enables them to transfer hundreds of high quality audio channels, replacing analogue cables and intricate installations of conventional analogue audio systems. Currently there are many systems in the market that distribute audio over networks for live music and studio applications, but this technology is not yet widespread. The reasons that audio networks are not as popular as it was expected are mainly the lack of interoperability between different vendors and still, the need of a wired network infrastructure. Therefore, the development of a wireless digital audio networking system based on the existing widespread wireless technology is a major research challenge. However, the ΙΕΕΕ 802.11 standard, which is the primary wireless networking technology today, appears to be unable to handle this type of application despite the large bandwidth available. Apart from the well-known drawbacks of interference and security, encountered in all wireless data transmission systems, the way that ΙΕΕΕ 802.11 arbitrates the wireless channel access causes significantly high collision rate, low throughput and long overall delay. The aim of this research was to identify the causes that impede this technology to support real time wireless audio networks and to propose possible solutions. Initially the standard was tested thoroughly using a data traffic model which emulates a multi-channel real time audio environment. Broadcasting was found to be the optimal communication method, in order to satisfy the intolerance of live audio, when it comes to delay. The results were analysed and the drawback was identified in the hereditary weakness of the IEEE 802.11 standard to manage broadcasting, from multiple sources in the same network. To resolve this, a series of modifications was proposed for the Medium Access Control algorithm of the standard. First, the extended use of the "CTS-to-Self" control message was introduced in order to act as a protection mechanism in broadcasting, similar to the RTC/CTS protection mechanism, already used in unicast transmission. Then, an alternative "random backoff" method was proposed taking into account the characteristics of live audio wireless networks. For this method a novel "Exclusive Backoff Number Allocation" (EBNA) algorithm was designed aiming to minimize collisions. The results showed that significant improvement in throughput can be achieved using the above modifications but further improvement was needed, when it comes to delay, in order to reach the internationally accepted standards for real time audio delivery. Thus, a traffic adaptive version of the EBNA algorithm was designed. This algorithm monitors the traffic in the network, calculates the probability of collision and accordingly switches between classic IEEE 802.11 MAC and EBNA which is applied only between active stations, rather than to all stations in the network. All amendments were designed to operate as an alternative mode of the existing technology rather as an independent proprietary system. For this reason interoperability with classic IEEE 802.11 was also tested and analysed at the last part of this research. The results showed that the IEEE 802.11 standard, suitably modified, is able to support multiple broadcasting transmission and therefore it can be the platform upon which, the future wireless audio networks will be developed.

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Dao, Trong Nghia Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Modelling 802.11 networks for multimedia applications." Publisher:University of New South Wales. Electrical Engineering & Telecommunications, 2008. http://handle.unsw.edu.au/1959.4/41222.

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This thesis is concerned with the development of new mathematical models for the IEEE 802.11??s access mechanisms, with a particular focus on DCF and EDCA. Accurate mathematical models for the DCF and EDCA access mechanisms provide many benefits, such as improved performance analysis, easier network capacity planning, and robust network design. A feature that permeates the work presented in this thesis is the application of our new models to network environments where both saturated and non-saturated traffic sources are present. The scenario in which multiple traffic sources are present is more technically challenging, but provides for a more realistic setting. Our first contribution is the development of a new Markov model for non-saturated DCF in order to predict the network throughput. This model takes into account several details of the protocol that have been hitherto neglected. In addition, we apply a novel treatment of the packet service time within our model. We show how the inclusion of these effects provides more accurate predictions of network throughput than earlier works. Our second contribution is the development of a new analytical model for EDCA, again in order to predict network throughput. Our new EDCA model is based on a replacement of the normal AIFS parameter of EDCA with a new parameter more closely associated with DCF. This novel procedure allows EDCA to be viewed as a modified multi-mode version of DCF. Our third contribution is the simultaneous application of our new Markov models to both the non-saturated and the saturated regime. Hitherto, network throughput predictions for these regimes have required completely separate mathematical models. The convergence property of our model in the two regimes provides a new method to estimate the network capacity of the network. Our fourth contribution relates to predictions for the multimedia capacity of 802.11 networks. Our multimedia capacity analysis, which is based on modifications to our Markov model, is new in that it can be applied to a broad range of quality of service requirements. Finally, we highlight the use of our analysis in the context of emerging location-enabled networks.

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Habib, Gilbert. "Qualité de service et qualité de controle d'un système discret controlé en réseau sans fil : proposition d'une approche de co-conception appliquée au standard IEEE 802.11." Thesis, Nancy 1, 2010. http://www.theses.fr/2010NAN10093/document.

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L'utilisation de la communication sans fil dans les applications de contrôle offre de nombreux avantages comme la mobilité. Toutefois, la communication sans fil souffre de nombreux inconvénients tels que la perte d'information, délais aléatoires. Ces problèmes sont essentiellement induits par le non déterministe du comportement de la communication sans fil qui peut avoir un impact négatif sur la performance du système. L'objectif de ce travail porte sur l'amélioration des performances de Systèmes Discrets Contrôlés via un Réseau Sans fil. Ses systèmes sont caractérisés par une commande logique distribuée sur des automates programmables et des boîtiers d'entrées/sorties déportés communiquant via un réseau de communication sans fil, IEEE 802.11. L'approche proposée repose sur un processus de co-conception basé : un, sur une modélisation conjointe des comportements de la commande et du réseau au travers de modèles SED déterministes pour la commande et stochastiques pour le réseau, et sur la simulation pour évaluer les performances des SDCR sans fil et notamment leur temps de réponse. Deux, la proposition d'un algorithme qui alloue dynamiquement les priorités définies par l'IEEE 802.11e sur les trafics de communication en fonction des besoins et des états de la commande; cet algorithme est évalué sur un cas d'étude, pour lequel la communication sans fil induit des risques de collision entre des équipements d'une installation industrielle, en utilisant l'environnement de simulation précédemment défini. Les simulations montrent une amélioration de la performance du système surtout dans des cas où le réseau est très chargé
Using wireless communication in the control system introduces many advantages like reduced wiring costs but also many drawbacks such as the delays, packet losses... which may disturb the system performance. The objective of this thesis is to improve the performance of a Wireless Networked Discrete Control System. This kind of system is characterized with a logic command distributed among PLC and plant part communicating through a wireless network, IEEE 802.11. The proposed approach is based on a co-design concept by simultaneously modeling the behavior of the command part (deterministic), and network part (non deterministic). Simulation tools do not cope with this co-design point of view because they are generally either ?control design? or ?network analysis? dedicated. Two solutions are explored: first, by integrating the network model into a control-oriented tool, Matlab-Truetime library and second, by integrating the discrete control system behavior into a network-oriented tool, OPNET. Comparisons between these tools confirm the possibility of modeling a WNDCS using Matlab-Truetime (with some modifications) and OPNET. Moreover, an algorithm is proposed to improve the global system performance; it dynamically allocates IEEE 802.11e priorities to the communication traffic with regard to the control requirements and the current state of the system, but also by taking into account the current quality of service provided by the network. Simulations of a case study performed using OPNET have highlighted the efficiency of the proposed algorithm

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Nguyen, Van Nam. "Évaluation de la bande passante disponible et traitement du partage dans les réseaux sans fil multisauts basés sur le standard IEEE 802.11 DCF." Thesis, Lyon 1, 2012. http://www.theses.fr/2012LYO10305/document.

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Les réseaux sans fil multisauts présentent un certain nombre d'intérêts car ils n'ont pas besoin d'infrastructure fixe, sont peu coûteux et sont simples d'utilisation. Le mode DCF de IEEE 802.11 est souvent utilisé comme le protocole d'accès au canal pour les nœuds dans ces réseaux. Un avantage de ce protocole est qu'il est facile à implémenter. Pourtant, ses performances dépendent de deux facteurs importants : le partage du canal sans fil et les collisions entre paquets provenant des nœuds cachés. L'évaluation de ces paramètres est donc importante afin d'améliorer la performance de ce protocole. La première partie de la thèse est consacrée à l'évaluation de la bande passante disponible. C'est un paramètre qui est souvent utilisé pour le contrôle d'admission ou pour le routage dans ces réseaux. Dans la littérature, il existe de nombreuses méthodes qui permettent d'estimer la bande passante disponible sur un lien sans fil. Pourtant, ces méthodes ne prennent pas en compte la notion de retransmission qui est définie dans IEEE 802.11 et qui a clairement des impacts sur la bande passante disponible. Nous proposons donc une nouvelle méthode passive, appelée RABE (Retransmission-based Available Bandwidth Estimation). Notre méthode se base principalement sur des informations locales qui peuvent être détectées par chaque nœud du lien. Nous évaluons également la probabilité de collisions non conditionnelle des paquets provenant des nœuds cachés via un modèle analytique. Cette probabilité nous permet d'estimer le nombre moyen de retransmissions qui est ensuite utilisé pour évaluer d'autres paramètres utilisé par RABE. Les simulations réalisées avec le simulateur ns2.33 montrent que notre méthode produit des résultats plus précis que d'autres méthodes existantes
The first part of the thesis is devoted to the evaluation of the available bandwidth. This is a parameter that is often used for admission control in these networks. In the literature, there are many methods for estimating the available bandwidth on a wireless link. However, these methods do not take into account the concept of retransmission which is defined in IEEE 802.11 and have clear impacts on the available bandwidth. We propose therefore a new passive method called RABE (Retransmission-based Available Bandwidth Estimation). Our method is based mainly on local information that can be detected by each node. We also evaluate the unconditional collision probability of packets from hidden nodes via an analytical model. This probability allows us to estimate the average number of retransmissions, which is then used to evaluate other parameters used by RABE. The simulations performed with the simulator ns2.33 show that our method produces more accurate results than other existing solutions. In the second part, we focus on the distribution of idle periods of a node that is often used to evaluate the performance of wireless networks based on IEEE 802.11. The problem is that there are different assumptions for this distribution in literature. We first characterize different types of idle periods in some fundamental scenarios such as the scenario as asymetric hidden stations and the scenario of flow in the middle. We then generalize these types of idle periods for relatively highly loaded networks. The obtained simulation results in ns2.33 are similar to our proposed model. This work also brings out that these distributions are multimodal, unlike what is often assumed in the literature

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Fahmy, Nader S. Todd Terence D. "Ad hoc networks with power-controlled multi-antenna systems: MAC protocols and multihop relaying applications." *McMaster only, 2005.

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Dissertations / Theses on the topic 'IEEE 80211 (Standard)'

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