Cellular Communications Systems in Congested Environments, Ghorbanzadeh
Автор: Nishith Tripathi,Jeffrey H. Reed Название: Cellular Communications: A Comprehensive and Practical Guide ISBN: 0470472073 ISBN-13(EAN): 9780470472071 Издательство: Wiley Рейтинг: Цена: 18208.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Even as newer cellular technologies and standards emerge, many of the fundamental principles and the components of the cellular network remain the same.
Описание: TETRA is a system for mobile wireless communications, and although its structure is comparable to the world--wide successful GSM system, TETRA has features that are often more efficient and better deigned than in GSM (Global Systems for Mobile Communications).
Описание: * A new and updated edition of the highly successful comprehensive reference to satellite communications. * Includes more information on techniques allowing service provision of multimedia content * Discusses the mobile satellite channel in view of expected developments of broadcasting.
Описание: Significant progress has been made in the last decade in the understanding and modeling of propagation effects on radio wave propagation in the bands utilized for satellite communications, including extensive direct measurements and evaluation utilizing orbiting satellites. This book provides a single source for a comprehensive description and analysis of all of the atmospheric effects of concern for todays satellite systems and the tools necessary to design the links and evaluate system performance. Many of the tools and calculations are provided in a handbook form, with step-by-step procedures and all necessary algorithms in one place to allow direct calculations from one source. Covers: Satellite Orbits, Satellite Subsystems, The RF Link, Link System Performance, Transmission Impairments, Propagation Effects Modeling Analog Satellite Systems, Signal Processing Digital Satellite Systems, Satellite Multiple Access, Mobile Satellite Networks, Satellite Broadband, Satellite Applications and Trends
Автор: John C. Strassner; Yacine M. Ghamri-Doudane Название: Modelling Autonomic Communications Environments ISBN: 3642050050 ISBN-13(EAN): 9783642050053 Издательство: Springer Рейтинг: Цена: 9781.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
The objective of this SpringerBrief is to present security architectures and incentive mechanisms to realize system availability for D2D communications. D2D communications enable devices to communicate directly, improving resource utilization, enhancing user’s throughput, extending battery lifetime, etc. However, due to the open nature of D2D communications, there are two substantial technical challenges when applied to large-scale applications, that is, security and availability which is demonstrated in this book.
This SpringerBrief proposes a secure data sharing protocol, which merges the advantages of public key cryptography and symmetric encryption, to achieve data security in D2D communications. Furthermore, a joint framework involving both the physical and application layer security technologies is proposed for multimedia service over D2D communications thus the scalable security service can be achieved without changing the current communication framework. Additionally, as the system availability largely depends on the cooperation degree of the users, a graph-theory based cooperative content dissemination scheme is proposed to achieve maximal Quality of Experience (QoE) with fairness and efficiency.
This SpringerBrief will be a valuable resource for advanced-level students and researchers who want to learn more about cellular networks.
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