Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 29 for “"voice and data"”.
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Performance of voice and data transmission using the IEEE 802.11 MAC Protocol
The IEEE 802.11 wireless LAN standard attempts to provide high throughput and reliable data delivery for stations transmitting over a lossy, wireless medium. To efficiently allocate resources for bursty sources, the 802.11 Medium Access Control (MAC) sublayer uses a type of Carrier Sense Multiple …
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Flow control and routing in an integrated voice and data communication network
… of Technology, Dept. of Electrical Engineering and Computer Science, 1981.
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The integration of routing and flow-control for voice and data in a computer communication network
… of Technology, Dept. of Electrical Engineering and Computer Science, 1982.
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Performance analysis of VSAT networks
… networks offer a solution to the increasing demand for low-density voice and data communications. Spread Spectrum and single-channel-per-carrier (SCPC) transmission techniques work well for multiple access purposes while allowing the earth station antennas to remain small. Direct sequence code …
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Traffic Dimensioning for Multimedia Wireless Networks
… adopting third-generation (3G) technologies and those migrating from second-generation (2G) to 3G face a number of challenges related to traffic modeling, demand characterization, and performance analysis, which are key elements in the processes of designing, dimensioning and optimizing their …
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Voice over Internet Protocol (VoIP) : the dynamics of technology and regulation
"What Voice over Internet Protocol (VoIP) is going to do is start to weaken the foundation of the way we've done things for 100 years...Congress already should be discussing the next telecom bill," said Federal Communications Commission (FCC) Chairman Michael Powell in February 2004, before the …
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Assessment of Voice Over IP as a solution for Voice over ADSL
Voice over DSL (VoDSL) is a technology that enables the transport of data and multiple voice calls over a single copper-pair. VoDSL employs packet voice technology instead of the traditional circuit switched voice. Voice over ATM (VoATM) and Voice over IP (VoIP) are the two main alternatives for …
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Analysis and design of a data network for distance education for the state of Virginia
A need exists for the State of Virginia to have a data network for its televised distance education program. A combination of a terrestrial and a satellite data network can be utilized for the purpose. The network is analyzed and its strengths and weaknesses are presented. A data protocol has been …
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An educational VSAT system for Thailand
… opportunities to combine satellite technology and the needs of education in Thailand. An educational VSAT network for Thailand needs a central hub station in Bangkok and seven remote sites with VSAT equipment. The network supports two way compressed video, voice and data links between the …
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Co-Channel Interference In Bluetooth Piconets
Bluetooth™ is an emerging short-range RF wireless voice and data communication technology expected to spread widely in a couple of years. The open specification technology eliminates the need for cables to connect mobile phones, portable computers and countless other devices to each other from all …
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Traffic engineering for hybrid optical and electronic switching networks
… of these applications including real-time video and audio traffic require a more robust architecture that can deliver faster response times to the service requested. The Internet infrastructure currently supports a best effort service paradigm that does not differentiate between different flows. …
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High speed internet access using cellular infrastructure
… such as WiFi, WiMAX, MBWA, satellite and cell phone networks. This thesis examines the potential usage of providing Internet access through cellular infrastructure. The cellular evolution path from first generation (1G) to third generation (3G) and fourth generation (4G) systems is …
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Performance of CDMA power control for HAPS
In parallel with terrestrial and satellite wireless networks, a new alternative based on platforms located in the stratosphere has recently introduced, known as High Altitude Platforms (HAPS). HAPS are either airships or aircraft positioned between 17 and 22.5 km above the earth surface. It has …
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An Integrated voice-data transmission system for private mobile radio
… the available spectrum. Although the release of Band III has contributed significantly to alleviating the spectrum shortage, it will however, not be sufficient to accommodate the projected growth in private mobile radio (PMR). Consequently, new techniques of efficient spectrum utilisation are …
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Perspectives on the satellite services industry : analysis of challenges and opportunities in the market, policy and regulatory environments
This thesis focuses on Space Communications and combines engineering, economics, market, and policy analyses to identify challenges and opportunities in the industry that are beyond the scope of any one isolated discipline. This work is divided in two parts. The first part begins by discussing the …
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Design of Media Access Control Schemes for Performance Enhancement of Future Generation Wireless Systems
… provide connectivity to many businesses, homes and educational institutions. The wireless channel itself is plagued with numerous problems, such as it does not natively allow sharing of the wireless resource. WLAN devices utilize a complex medium access control (MAC) mechanism to allow multiple …
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Load balancing in heterogeneous wireless communications networks. Optimized load aware vertical handovers in satellite-terrestrial hybrid networks incorporating IEEE 802.21 media independent handover and cognitive algorithms.
… technologies such as satellite, UMTS, WiMax and WLAN are being used to provide network access for both voice and data services. In big cities, the densely populated areas like town centres, shopping centres and train stations may have coverage of multiple wireless networks. Traditional Radio …
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A vulnerability assesment framework for the IMS
… services being made available via more and more devices to end users, it is no longer feasible to develop a delivery platform for each new type of service. The IP multimedia subsystem (IMS) aims to provide a unified service delivery platform capable of supporting a wide range of …
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Predistortion for Nonlinear Power Amplifiers with Memory
The fusion of voice and data applications, along with the demand for high data-rate applications such as video-on-demand, is making radio frequency (RF) spectrum an increasingly expensive commodity for current and future communications. Although bandwidth-efficient digital modulation alleviates …
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AAL2 switching node to support voice services in 3rd and 4th generation networks
The research community and industry alike have, over the past decade, been showing considerable interest in packet-switching networks to support voice services as well as data services. A technology that was standardised to accommodate these delay-sensitive requirements is Asynchronous Transfer …
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