186,708 research outputs found

    A review of personal communications services

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    This article can be accessed from the link below - Copyright @ 2009 Nova Science Publishers, LtdPCS is an acronym for Personal Communications Service. PCS has two layers of meaning. At the low layer, from the technical perspective, PCS is a 2G mobile communication technology operating at the 1900 MHz frequency range. At the upper layer, PCS is often used as an umbrella term that includes various wireless access and personal mobility services with the ultimate goal of enabling users to freely communicate with anyone at anytime and anywhere according to their demand. Ubiquitous PCS can be implemented by integrating the wireless and wireline systems on the basis of intelligent network (IN), which provides network functions of terminal and personal mobility. In this chapter, we focus on various aspects of PCS except location management. First we describe the motivation and technological evolution for personal communications. Then we introduce three key issues related to PCS: spectrum allocation, mobility, and standardization efforts. Since PCS involves several different communication technologies, we introduce its heterogeneous and distributed system architecture. IN is also described in detail because it plays a critical role in the development of PCS. Finally, we introduce the application of PCS and its deployment status since the mid-term of 1990’s.This work was supported in part by the National Natural Science Foundation of China under Grant No. 60673159 and 70671020; the National High-Tech Research and Development Plan of China under Grant No. 2006AA01Z214, and the Engineering and Physical Sciences Research Council (EPSRC) of UK under Grant EP/E060722/1

    Inter-Domain Integration of Services and Service Management

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    The evolution of the global telecommunications industry into an open services market presents developers of telecommunication service and management systems with many new challenges. Increased competition, complex service provision chains and integrated service offerings require effective techniques for the rapid integration of service and management systems over multiple organisational domains. These integration issues have been examined in the ACTS project Prospect by developing a working set of integrated, managed telecommunications services for a user trial. This paper presents the initial results of this work detailing the technologies and standards used, the architectural approach taken and the application of this approach to specific services

    Digital Twin for Non-Terrestrial Networks: Vision, Challenges, and Enabling Technologies

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    This paper explores the transformative potential of digital twin (DT) technology in the context of non-terrestrial networks (NTNs). NTNs, encompassing both airborne and space-borne elements, present unique challenges in network control, management, and optimization. DT is a novel approach to design and manage complicated cyber-physical systems with a high degree of automation, intelligence, and resilience. The adoption of DTs within NTNs offers a dynamic and detailed virtual representation of the entire ecosystem, enabling real-time monitoring, simulations, and data-driven decision-making. This paper delves into the envisioned integration of DTs in NTNs, discussing the technical challenges and highlighting key enabling technologies. Emphasis is placed on technologies such as Internet of things (IoT), artificial intelligence (AI), space-based cloud computing, quantum computing, and others, providing a comprehensive overview of their potentials in empowering DT development for NTNs. In closing, we present a case study involving the implementation of a data-driven DT model to facilitate dynamic and service-oriented network slicing within an open radio access network (O-RAN) architecture for NTNs. This work contributes to shaping the future of network control and management in the dynamic and evolving landscape of non-terrestrial communication systems

    Customer-engineer relationship management for converged ICT service companies

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    Thanks to the advent of converged communications services (often referred to as ‘triple play’), the next generation Service Engineer will need radically different skills, processes and tools from today’s counterpart. Why? in order to meet the challenges of installing and maintaining services based on multi-vendor software and hardware components in an IP-based network environment. The converged services environment is likely to be ‘smart’ and support flexible and dynamic interoperability between appliances and computing devices. These radical changes in the working environment will inevitably force managers to rethink the role of Service Engineers in relation to customer relationship management. This paper aims to identify requirements for an information system to support converged communications service engineers with regard to customer-engineer relationship management. Furthermore, an architecture for such a system is proposed and how it meets these requirements is discussed

    Intelligent distributed multimedia collection: content aggregation and integration

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    People's multimedia content is spread around their home network and content services on the Internet, such as YouTube, Flickr, Facebook. In this paper we present a system that aggregates all the multimedia content of the end user and integrates it into a unified collection for the user's convenience. The system provides location transparency of multimedia content, content filtering on player compatibility and metadata completion to aid in improved usability. This effectively enables the user to rediscover his multimedia collection without any technical knowledge. A proof-of-concept implementation known as Intelligent Distributed Multimedia Collection (IDMC) has been made that is able to detect and browse UPnP MediaServer devices as well as collect information from YouTube. This implementation also contains a media player and is able to control UPnP MediaRenderer devices remotely. Furthermore, performance has been measured to assess different ways of iterating through a multimedia collection
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