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UMTS
UMTS (Universal Mobile Telecommunication System) ist die dritte Generation von Telekommunikationssystemen und beruht auf der Funkschnittstelle WCDMA (Wideband Code Division Multiple Access). WCDMA bietet im Vergleich zu CDMA Vorteile durch die Nutzung eines breiteren Übertragungsbandes, eine hohe Übertragungsrate (maximal 2 Mbit/s) sowie eine gesteigerte Systemkapazität und Kommunikationsqualität durch statistisches Multiplexing. UMTS macht Dienste für die Benutzer von mobilen Computern und Mobiltelefonen unabhängig von ihrem Standort zugänglich und ermöglicht innovative Dienste (zum Beispiel pay-per-bit, pay-per-session, flat rate, asymmetric bandwidth, Video Conferencing, Virtual Home Environment und andere). Dieser Band führt Sie in zellulare Netze und die digitale Kommunikation ein. Behandelt werden die Funkschnittstelle, der Funkzugang und das Basisnetzwerk. Gut verständlich werden die 99er Spezifikation erklärt sowie UMTS-Dienste und zukünftige Dienste, die über 3G hinausgehen, vorgestellt. Viele Übungsaufgaben, teils mit Lösungen, erleichtern das Vertiefen des Stoffes.
Spectrum Requirement Planning in Wireless Communications
Presents the model and methodology, applied by ITU-R WRC’07, to calculate the spectrum requirement Spectrum Requirement Planning in Wireless Communications: Model and Methodology for IMT-Advanced is a self-contained “handbook” of the models and methodologies used for the spectrum requirement calculation for IMT-Advanced systems, as well as for the predecessor IMT-2000 systems. The reader will learn how the spectrum requirement is calculated for real systems that prevail worldwide. The book also provides the basis on which to develop advanced methodologies for yet future systems, as the spectrum regulation will continue in the future. Spectrum Requirement Planning in Wireless Communicat...
IEEE 802 Wireless Systems
Throughout the next decade, 802 wireless systems will become an integral part of fourth generation (4G) cellular communication systems, where the convergence of wireless and cellular networks will materialize through support of interworking and seamless roaming across dissimilar wireless and cellular radio access technologies. IEEE 802 Wireless Systems clearly describes the leading systems, covering IEEE 802.11 WLAN, IEEE 802.15 WPAN, IEEE 802.16 WMAN systems’ architecture, standards and protocols (including mesh) with an instructive approach allowing individuals unfamiliar with wireless systems to follow and understand these technologies. Ranging from digital radio transmission fundamenta...
Radio Resource Management in Cellular F/TDMA Smart Antenna Systems
Zur Kapazitätserhöhung in zellularen Mobilfunksystemen eignet sich der Einsatz adaptiver Antennen an der Basisstation. Diese ermöglichen die räumliche Wiederverwendung von Kanälen innerhalb einer Zelle mittels Space Division Multiple Access (SDMA). Die Kapazitätsgewinne, die mit SDMA zu erzielen sind, hängen jedoch stark von den verwendeten Verfahren des Ressourcen Managements (RM) ab. Hierzu wurden neuartige RM-Verfahren für SDMA-Systeme entwickelt, welche die räumliche Kanalwiederverwendung innerhalb der Zelle mit verschiedenen Prinzipien der interzellularen Kanalvergabe (statische und dynamische) kombinieren. Zudem wurden die entwickelten Verfahren erweitert, um auch in hierarchi...
Cognitive Radio and Dynamic Spectrum Access
Cognitive Radio for Dynamic Spectrum Access gives a comprehensive overview of the main concepts behind radio spectrum regulation, dynamic spectrum access and cognitive radio. Spectrum measurements are introduced to illustrate the inefficiencies in today’s spectrum usage and the book also discusses enablers for horizontal and vertical spectrum sharing. Among others a game-theory-based approach for spectrum sharing is described and evaluated. Institution and standardisation approaches in academic research and industry are highlighted including IEEE SCC41, 802.11k/n/s/y and 802.22 which lead towards commercial exploitation of cognitive radio. In conclusion, this book looks at the initial steps towards the vision of true cognitive radio and the potential impact on telecommunication business. Introduces the benefits and challenges of cognitive radio Presents cognitive radio in research and industry and covers implications for operators from the perspective of a telecom operator Examines how cognitive radio techniques will considerably change the wireless communication market.
Evolutionary Trends of the Internet
This book constitutes the refereed proceedings of the Thyrrhenian International Workshop on Digital Communication, IWDC 2001, held in Taormina, Italy in September 2001. The 46 revised full papers presented are a mix of invited papers and selected submitted papers and reflect the state of the art in multiservice IP network research and development. The book offers topical sections on WDM technologies for the next generation Internet, mobile and wireless Internet access, QoS in the next generation Internet, multicast and routing in IP networks, mulitmedia services over the Internet, performance of Internet protocols, dynamic service management, and source encoding and Internet applications.
Computational Science and Its Applications - ICCSA 2003
The three-volume set, LNCS 2667, LNCS 2668, and LNCS 2669, constitutes the refereed proceedings of the International Conference on Computational Science and Its Applications, ICCSA 2003, held in Montreal, Canada, in May 2003.The three volumes present more than 300 papers and span the whole range of computational science from foundational issues in computer science and mathematics to advanced applications in virtually all sciences making use of computational techniques. The proceedings give a unique account of recent results in computational science.
Emerging Location Aware Broadband Wireless Ad Hoc Networks
Emerging Location Aware Broadband Wireless Ad Hoc Networks is a compilation of new material on wireless networking and technology addressing several technical challenges in the field. The contributions are authored by distinguished experts who presented experimental results on their work at the recent International Symposium on Personal, Indoor, Mobile, Radio Communications (PIMRC) held in Barcelona, Spain, September 5-8, 2004. The authors present new results on issues involving wireless LANs and ad hoc networks; mobile wireless internet and satellite applications; encoding, algorithms and performance; and issues related to overlay networks, cross layer interactions and smart antennas. Whether you’re a telecommunications/networking specialist, systems engineer or a scientist, Emerging Location Aware Broadband Wireless Ad Hoc Networks provides valuable insight from experts in wireless networking for developing wireless systems and meeting future application requirements.
Personal Wireless Communications
This book constitutes the refereed proceedings of the IFIP-TC6 Eighth - ternational Conference on Personal Wireless Communications, PWC 2003. PWC 2003 is the ?agship conference of the IFIP Working Group 6.8, Mobile and Wireless Communications, and is the premier international forum for discussions between researchers, practitioners, and students interested in the symbiosis of mobile computing and wireless networks. It is a great pleasure to present the PWC 2003 technical program. This year the conference received 115 submissions from 27 countries indicating that PWC is a reference conference for worldwide researchers from the wireless and mobile community. With so many papers to choose from,...
Personal Wireless Communications
This book constitutes the refereed proceedings of the IFIP-TC6 International Conference on Personal Wireless Communications, PWC 2004, held in Delft, Netherlands in September 2004. The 25 revised full papers and 13 revised short papers presented were carefully reviewed and selected from 100 submissions. Among the topics addressed are all current aspects of personal wireless communications, in particular IPv6, MIPv6, self-organization, network mobility, personal area networks, PAN, QoS, ad-hoc networks, 802.11 networking, wireless sensor networks, ad-hoc sensor networks, W-CDMA networks, UMTS, network performance, network security, and mobile IPv6.
