System services and architecture of the TMI satellite mobile data system

The North American Mobile Satellite Service (MSS) system being developed by AMSC/TMI and scheduled to go into service in early 1995 will include the provision for real time packet switched services (mobile data service - MDS) and circuit switched services (mobile telephony service - MTS). These services will utilize geostationary satellites which provide access to mobile terminals (MT's) through L-band beams. The MDS system utilizes a star topology with a centralized data hub (DH) and will support a large number of mobile terminals. The DH, which accesses the satellite via a single Ku band beam, is responsible for satellite resource management, for providing mobile users with access to public and private data networks, and for comprehensive network management of the system. This paper describes the various MDS services available for the users, the ground segment elements involved in the provisioning of these services, and a summary description of the channel types, protocol architecture, and network management capabilities provided within the system

L-band and SHF multiple access schemes for the MSAT system

The first generation of the Canadian Mobile Satellite (MSAT) system, planned to be operational in the early 1990s, will provide voice and data services to land, aeronautical, and maritime mobile terminals within the Canadian land mass and its territorial waters. The system will be managed by a centralized Demand Assignment Multiple Access (DAMA) control system. Users will request a communication channel by communicating with the DAMA Control System (DCS) via the appropriate signalling channels. Several access techniques for both L-band and SHF signalling channels have been investigated. For the L-band, Slotted Aloha (SA) and Reservation Aloha (RA), combined with a token scheme, are discussed here. The results of Telesat studies to date indicate that SA, when combined with token scheme, provides the most efficient access and resource management tool in a mobile propagation environment. For SHF signalling channels, slim time division multiple access (TDMA) and SA have been considered as the most suitable candidate schemes. In view of the operational environment of the SHF links, provision of a very short channel access delay and a relatively high packet success rate are highly desirable. Studies carried out generally favor slim-TDMA as the most suitable approach for SHF signalling channels

Integrated survey for the reconstruction of the Papal Basilica and the Sacred Convent of St. Francis in Assisi, Italy

The Papal Basilica and the Sacred Convent of Saint Francis in Assisi in Italy are characterized by unique and composite particularities that need an exhaustive knowledge of the sites themselves to guarantee visitor's security and safety, considering all the people and personnel normally present in the site, visitors with disabilities and finally the needs for cultural heritage preservation and protection. This aim can be reached using integrated systems and innovative technologies, such as Internet of Everything (IoE), which can connect people, things (smart sensors, devices and actuators; mobile terminals; wearable devices; etc.), data/information/knowledge and processes to reach the wanted objectives. The IoE system must implement and support an Integrated Multidisciplinary Model for Security and Safety Management (IMMSSM) for the specific context, using a multidisciplinary approach. The purpose of the paper is to illustrate the integrated survey for the reconstruction of the considered site that was necessary to obtain all the necessary information to start to set up the considered IMMSSM and the related IoE based technological system

Technical note: A mobile collaborative workspace to assist forensic experts in disaster victim identification scenarios

Integrated approaches to disaster victim identification (DVI) management have led to a need for technologies to improve interaction among parties involved in post-mortem (PM) and ante-mortem (AM) data collection through better communication and coordination. Mobile Forensic Workspace© (MFW) is a collaborative mobile system that not only facilitates the systematic collection of high-quality data, but also allows DVI professionals to coordinate activities and exchange data through secure real-time communication at major disaster scenarios in accordance with security, privacy and legal protocols. MFW is adaptable to any communication format (text, voice calls, photographs, etc.) and is dynamically self-reconfigurable when connectivity problems arise. It also allows data integration and backup through secure communication channels between local and remote servers. The feasibility of the system has been demonstrated through implementation of MFW on the iOS platform for iPhone, iPod Touch and iPad terminals. A further strength of MFW is that it provides out-of-the-box support for INTERPOL DVI forms. The application of information and communication technologies for DVI was shown to be useful in improving DVI management by enhancing the quality of data collection and enabling non-Internet dependent real-time data sharing and communication

Bringing the Enterprise System to the Frontline Intertwining Computerized and Conventional Communication at BT Europe

This paper draws on the need to understand how mobile technology is implemented and used at the organisational level. IT is a general-purpose technology and therefore its use involves a high degree of uncertainty and ambiguity. Moreover, IT vendors and system developers tend to be very unambiguous in their rhetoric about mobile technology opportunities. Therefore, managers have trouble to identify the real scope, the functionality and the impact of new mobile applications. However, these three types of uncertainties need to be handled in change management projects where new information technology is involved. Gradual uncertainty reduction at these three different levels, i.e. what technology can do; will technology work; and will users adopt it, is studied in this paper. This is achieved through an analysis of the implementation process of an information system where mobile terminals are used to give service technicians access to the ERP system at BT Europe, a leading supplier of forklift trucks. The analysis shows how the three levels of uncertainty interact, and how the computerised parts of the information system are complemented by mindful intertwining with the non-computerised communication and manual data processing, in order for the information system to work

Service Platform for Converged Interactive Broadband Broadcast and Cellular Wireless

A converged broadcast and telecommunication service platform is presented that is able to create, deliver, and manage interactive, multimedia content and services for consumption on three different terminal types. The motivations of service providers for designing converged interactive multimedia services, which are crafted for their individual requirements, are investigated. The overall design of the system is presented with particular emphasis placed on the operational features of each of the sub-systems, the flows of media and metadata through the sub-systems and the formats and protocols required for inter-communication between them. The key features of tools required for creating converged interactive multimedia content for a range of different end-user terminal types are examined. Finally possible enhancements to this system are discussed. This study is of particular interest to those organizations currently conducting trials and commercial launches of DVB-H services because it provides them with an insight of the various additional functions required in the service provisioning platforms to provide fully interactive services to a range of different mobile terminal types

Разработка научно-технических основ мобильных систем для приёма и программно-технического анализа последовательностей котировочных данных

В статье рассматривается многотерминальная программно-аппаратная система для технического анализа последовательностей котировочных данных, предназначенная для повышения эффективности осуществляемых операций с финансовыми инструментами, например, при работе на фондовых и валютных биржах. В созданном образце системы автоматический анализ данных в реальном времени выполняется на стационарном сервере, а контроль результатов и управление осуществляется из набора стационарных терминалов и мобильных терминалов для дистанционного и мобильного контроля и управления.Розглядається багатотермінальна програмно-апаратна система для технічного аналізу послідовностей котирувальних даних, призначена для підвищення ефективності здійснюваних операцій з фінансовими інструментами, наприклад, при роботі на фондових та валютних біржах. У створеному зразку системи автоматичний аналіз даних у реальному часі виконується на стаціонарному сервері, а контроль результатів та управління здійснюється з набору стаціонарних терміналів та мобільних терміналів під операційною системою Андроїд для дистанційного та мобільного контролю та управління.In the article examines multiterminal hardware-software system for technical analysis of data sequences quotation is intended to increase the efficiency of the operations with financial instruments , such as investing in the stock and currency markets . The generated sample of automatic data analysis is performed in real time on a stationary server and control results and management is carried out from a set of stationary terminals and mobile terminals for mobile and remote monitoring and control