The wireless industry is growing very fast in the last decade with the main aim of high-speed, low-latency, and reliable communication. Localization, being a primary and essential component of wireless communication, needs to be efficient enough to match modern requirements. Wit…
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Digitalization is changing society, industry, and how business is done. For new companies that are more or less born digital, there is the opportunity to use and benefit from the capabilities offered by the new digital technologies, of which data-driven decision-making forms a c…
The unprecedented growth of Broadband Wireless Access (BWA) networks in recent years has boosted the use of both established and new multimedia applications. In order to satisfy the diverse Quality of Service (QoS) requirements entailed by these applications, an efficient traffi…
The primary challenge in wireless networks, unlike wireline networks, is the existence of interference and channel variations (fading). Having more users at higher data rates means that current point-to-point networks will not scale. To engineer a scalable network, a new paradig…
In order to efficiently utilize the scarce wireless resource as well as keep up with the ever-increasing demand for Quality-of-Service (QoS) of multimedia applications, wireless networks are undergoing rapid development and dramatic changes in the underlying technologies and pro…
OFDMA will be the multiple access scheme for next generation networks, including LTE and LTE-A. These networks will provide higher data rates than now, up to several hundred Mbps. These new networks, using a higher carrier frequency and offering flexible bandwidth for different …
The sky-rocketing growth of multimedia infotainment applications and broadband-hungry mobile devices exacerbate the stringent demand for ultra high data rate and more spectrum resources. Along with it, the unbalanced temporal and geographical variations of spectrum usage further…
As the demand for wireless communication services grows quickly, spectrum scarcity has been on the rise sharply. In this context, cognitive radio (CR) is being viewed as a new intelligent technology to solve the deficiency of fixed spectrum assignment policy in wireless communic…
Energy efficiency is crucial for ad hoc networks because of limited energy stored in the battery. Recharging the nodes frequently is sometimes not possible. Therefore, proper energy utilization is paramount. One possible solution of increasing energy efficiency is to optimize th…
Mobile ad hoc networks are of growing interest because of their unique characteristics and advantages in many practical applications. QoS provision acts as a major challenge in the routing protocol design in the real-world mobile ad hoc networks, especially for the real-time ser…
Cooperation is seen as a means to improve the signal in OFDMA wireless networks by overcoming the inter-cell interference. Such co-operation can be deployed in both the physical layer and the MAC layer. In this thesis, a cross-layer cooperation strategy is considered. Firstly, i…
Current propogation models are no longer sufficient for wireless network planning. They are neither accurate (empirical) nor fast enough (deterministic) to be applicable in the applications of Automated Cell Planning. This thesis focuses on the development of a new method, namel…
Next Generation networks (3G and beyond) are evolving towards all IP based systems with the aim to provide global coverage. For Mobility in IP based networks, Mobile IPv6 is considered as a standard by both industry and research community, but this mobility protocol has some rel…
Emerging Wireless technologies enable transfer of data at very high rates for services such as real-time video and image transmission. To avoid congestion in the system, efficient utilization of the wireless channel is paramount. One way to use the radio link efficiently is to m…
Currently, 3G and beyond cellular wireless networks supporting heterogeneous traffic with variable quality of service (QoS) requirements is already a reality. Efficient bandwidth utilization is the most important requirement for a radio resource management (RRM) technique along …
Transmission power control (TPC) has been used in wireless networks to improve channel reuse and/or reduce energy consumption. It has been mainly applied to single-input single-output (SISO) systems. Significant improvement in performance can be achieved by employing multi-input…
Ever increasing demands to achieve better performance of wireless networks have led the researchers to think beyond the conventional layered architecture of the protocol stack. Recent research activity across the diverse domain of wireless networks has revealed that high perform…
We design, implement and deploy a rural telemedicine network, connecting several villages to the Aravind Eye Hospitals in India, enabling over 100,000 (and counting) remote eye examinations, via high-quality video-conferencing between doctors and remote rural patients who otherw…