The goal for the Third Generation (3G) of mobile communications system is to seamlessly integrate a wide variety of communication services. The rapidly increasing popularity of mobile radio services has created a series of technological challenges. One of this is the need for power and spectrally efficient modulation schemes to meet the spectral requirements of mobile communications. Pulse shap...

In mobile environments, packet transmission services suffer from packet losses due to e.g. inadequate received signal quality, which is caused by the time and frequency selectivity of the mobile radio channel and by imperfections of mobile terminals, but also due to time-outs and entailed packet deletions, forced by protocols in the signaling domain of the infrastructure of a mobile communicati...

in this paper, a formal model for antivirus update agent system is presented based on mobile agent technology and predicate/transition petri nets. the mobile agent system contains two mobile agents called dca and una. it sends out agents to update antivirus on client computers in a network. each agent takes on a specified responsibility. first, dca roams through the network and check the last d...

This manuscript introduces a novel design concept for advanced mobile terminals with radio network aggregation capability and enhanced Quality of Service (QoS) provisioning for various multimedia services in heterogeneous wireless and mobile networks. We establish a new module that provides the best QoS and lowest cost for any given multimedia service (voice, video and audio) by using simultane...

In 2004, 2005 and 2006, the authors provided details of wireless network threats discovered during wireless threat analysis studies exposing a potentially serious flaw in the security architecture of software defined radio (SDR), cognitive radios (CR) and wireless mobile platforms. The reconfigurable radio terminal, and the host to which it is attached, are potentially vulnerable to exploitatio...

The propagation channel is the principal contributor to many of the problems and limitations that degrades the performance of mobile radio systems. One obvious example is multipath propagation which is a major characteristic of the mobile radio channels, which severely affects the performance of digital systems by reducing the carrier-to-interference ratio. Thus accurate characterization of the...

Value Added Services VAS in Mobile-Phone-Networks, found its way to TV & Radio stations through the benefits from the huge audience or followers they got. Also the traditional media decides to get advantages of VAS services and consider it as a new revenue source. The traditional TV & Radio stations and the mobile phone network based on 3G technologies and beyond, both get dramatic changes by t...

background: mobile health is one of the new technologies for the utilization of health information. for its successful implementation as well as any other system, we must primarily measure the adoption and use of its factors. the purpose of this study was to systematically investigate published articles about the factors affecting the adoption of mobile health and categorizing the factors affec...