Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.

Thesis (M.S.)--Villanova University, 2007. / Computer Science Dept. Includes bibliographical references.

Thesis (M.S.)--Rochester Institute of Technology, 2007. / Typescript. Includes bibliographical references (leaves 97-98).

Thesis (Ph. D.)--Washington State University, August 2007. / Includes bibliographical references (p. 125-133).

Thesis (M.Sc.)(Applied sciences)--University of Pretoria, 2005. / Includes bibliographical references. Available on the Internet via the World Wide Web.

Adrian Segall and Baruch Awerbuch. / "November, 1982." "Jan. 1982. Revised Oct. 1982." / Bibliography: p. 18-19. / Office of Naval Research Contract No. ONR/N00014-77-C-0532 Advanced Research Project Agency, US Department of Defense Contract No. N00014-75-C-1183

Thesis (Ph.D.)--University of Texas at Dallas, 2008. / Includes vita. Includes bibliographical references (leaves 93-99)

Magister Scientiae - MSc / Location-based service (LBS) is a geographical location-related service that provides highly personalized services for users. It is a platform for network operators to provide new and innovative ways of increasing profits from new services. With the rapidly growing trend toward LBS, there is a need for standard LBS protocols. This thesis started with introducing the Internet Engineering Task Force GEOPRIV working group, which endeavors to provide standard LBS protocols capable of transferring geographic location information for diverse location-aware applications. Through careful observation, it was found that Session Initiation Protocol (SIP) is well suited to the GEOPRIV requirements. The aim of this research was therefore to explore the possibility of the integration of LBS and the SIP protocol and, to some extent fulfill the GEOPRIV requirements. / South Africa

Packet-switched wireless data networks built upon IP (Internet Protocol)-based infrastructure are being envisioned to provide ubiquitous Internet access to mobile users. Supporting packet-data services along with the cellular voice services in an integrated networking framework gives rise to new network infrastructure and protocol design issues that are to be resolved to facilitate the introduction of the next generation wireless IP networks. This thesis addresses several protocol design issues in the area of wireless packet data networking, namely, retransmission control design for multichannel protocols, radio link level protocol for dynamic rate and error control, inter-layer protocol dependency, radio link-layer and transport-layer protocol fairness and radio link-level dynamic bandwidth allocation. A retransmission control policy for a multichannel S-ALOHA (slotted ALOHA) protocol in a high speed wireless data network is proposed and analyzed. A sub-optimal dynamic rate adaptation procedure is proposed for uplink data transmission in WCDMA (Wideband Code Division Multiple Access)-based wireless IP networks. The performance of this scheme is analyzed using a novel ‘mean-sense’ approach for interference calculation in cellular WCDMA environment. The impact of macrodiversity packet combining on transport-protocol throughput performance is analyzed under different link-level retransmission control policies. A unified TDMA (Time Division Multiple Access)-based centralized bandwidth management mechanism is proposed as a link-level solution for providing service fairness among competing users for uplink data transmission in a wireless IP network. TCP (Transmission Control Protocol) performance is evaluated under different transport-level packet scheduling policies in a correlated fading environment and a time frame-based scheduling policy is proposed to provide service fairness among mobile users in the case of downlink transmission. A set of centralized burst-level bandwidth allocation policies are investigated as a means of service integration with QoS (Quality of Service) provisioning in the wireless IP air interface. / Graduate

Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2005 / With the growth of the personal computer industry, a number of households now contain two or more personal computers. The need to share resources such as printers, scanners and other PC peripherals has become evident. Communication between personal computers and other smart devices in the home is also required. This brings the emergence of home networking together with home automation. Home networking is the collection of elements to enable the connection and integration of multiple computing, control and communication devices. There are various options at this stage for home networking. One of the broadband options is indoor power line communication. The aim of the project was to evaluate a communication system capable of performing efficiently in South African Home Power line environment. In designing a communication system capable of performing in the harsh conditions which are presented in the home environment (noise, attenuation, phase distortion, etc.), a mathematical model that is representative of a typical suburban South African home power line is required. To aid the modeling process, an experimental network was constructed so measurements could be taken in a controlled environment. In conjunction with simulation, the model of the home power line network has aided the design of the data communication system. The project has involved: • Determining optimal specifications for the communication system. • Development of a home power line model representative of a typical South African suburban home environment. • Construction and measurement of an experimental power grid • Development of methods, algorithms and programs for the design of an OFDM PLC modem (in software) to optimal specifications. • Simulation development in MA1LAB of the OFDM Modem. • Comparison of different OFDM sub-modulation schemes for enhancing the communication system performance, In conclusion, the simulation model of the PLC modem correlates well with typical practical systems. Optimising throughput of the communication system and hardware development of the modem will form the basis for further research.