We developed a multimedia satellite network system based on the Internet protocol (IP) and personal computers. It enables collaborative distance education between outdoor and indoor environments. Integration of IP technologies and satellite communications enhances the flexibility of the network system. The satellite communication system enables us to communicate to and from outdoor environments...

This paper describes an Intelligent Network (IN) concept in mobile communications and shows the implementation of personal mobility in mobile communication networks. Even though the current Wireless Intelligent Network (WIN) protocol does not accommodate Universal Personal Telecommunication (UPT) service, we design UPT service in the WIN. We assume that service pro le and location information o...

In the paper various issues in personal satellite communications are addressed. Basic geostationary and non-geostationary satellite constellations are considered. The narrowband and wideband characterization of the mobile satellite channel and related system implications are discussed. Satellite diversity is presented as a measure to overcome signal shadowing. The capacity of TDMA and CDMA mult...

A great natural disaster destroys every energy supplies and the communication network necessary for the organisation of health care (telephone, telex) is entirely or partially not functioning. It becomes impossible to be informed about the hospitals and others sanitary availabilities in the disaster area. Our personal experience, during the El Asnam's and Mexico's earthquakes demonstrates the n...

Next generation network computing systems are expected to provide a wide variety of Personal Mobility Services to users anytime, via a range of devices and anywhere in the world. Personal Mobility Services require an advanced architecture that integrates supported protocols, mechanisms and specialised functions to dynamically reconfigure applications. It should also integrate services that can ...

Anonymous fraudulent behavior can generate substantial financial burden and inconvenience. Moreover, the recent threat of terrorist infiltration to both business and government has yielded heightened interest in anonymous identity matching (AIM). Most applications of AIM require sophisticated methods robust to issues such as deliberate variation in identity attributes, missing data, and multi-s...

voltage control is one of the imperative issues in the smart distribution control system. while traditional distribution network is equipped with communication and monitoring equipment, the online voltage control can be perfectly achieved. with using these smart grid technologies, the distribution voltage control schemes should carry out intelligently and cover the undesirable effect of high pe...

A Personal Network (PN) is a new concept related to pervasive computing with a strong user-focused view. Whereas several existing technologies can offer solutions to part of a person’s future communication needs, there is very little work on combining these technologies into something a normal user can handle. It will undoubtedly be the network layer that should integrate a person’s all devices...

Currently, 3GPP is reinventing the telecom model of services in wireless Internet — a model that is not well suited to (1) meet the demands for new modes of personal mobile communication, enabled by wireless packet services and multimedia devices, or (2) the ability to deal with increasingly heterogeneous wireless infrastructure (one interpretation of 4G). This article characterizes the propert...

A Handheld Learning Resource (HandLeR) is a prototype personal handheld computer designed to support personal learning projects (Sharples, Corlett, & Westmancott, Forthcoming). The proposed device will be in constant network communication. It will provide tools for learners to capture, organise and share context specific multimedia objects such as notes, sounds and images. It will support field...