Hamid Aghvami – författare
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3 produkter
3 produkter
Inbunden, Engelska, 2006
1 775 kr
Skickas inom 5-8 vardagar
This book sets out to provide the theoretical foundations that will enable radio network planners to plan model and optimize radio networks using state-of-the-art findings from around the globe. It adopts a logical approach, beginning with the background to the present status of UMTS radio network technology, before devoting equal coverage to planning, modelling and optimization issues. All key planning areas are covered, including the technical and legal implications of network infrastructure sharing, hierarchical cell structure (HCS) deployment, ultra-high-site deployment and the benefits and limitations of using computer-aided design (CAD) software. Theoretical models for UMTS technology are explained as generic system models, stand-alone services and mixed services. Business modelling theory and methods are put forward, taking in propagation calculations, link-level, UMTS static and UMTS dynamic simulations. The challenges and goals of the automated optimization process are explored in depth using cutting-edge cost function and optimization algorithms. This theory-based resource containing prolific illustrative case studies explains the reasons for UMTS radio networks performance issues and how to use this foundational knowledge to model, plan and optimize present and future systems.
Inbunden, Engelska, 2009
1 262 kr
Skickas inom 11-20 vardagar
A hands-on tutorial on multicast in third-generation networks! In this book, the authors describe how to perform multicast, the one-to-many delivery of data to a group of destinations, in third-generation mobile networks.The authors provide an overview of the services that can be realized with multicast in third-generation networks, describe the mechanisms required to support these services and highlight the performance of several multicast mechanisms. The focus of this book is on multicast in UMTS and CDMA2000 networks, the dominant third-generation network standards. In addition to describing the standards for multicast, the authors also provide extensive performance results of multicast in third-generation networks.Key Features:•Provides an in-depth review of the fundamentals of multicast•Describes in detail the MBMS and BCMCS standards for multicast in UMTS and CDMA2000 networks, respectively•Provides a comprehensive overview of the services that can be realized with multicast in third-generation networks•Highlights the performance of multicast in third-generation networks•Investigates how multicast can be achieved in heterogeneous networks consisting of cellular and broadcast networksThis book is an invaluable resource for professional engineers and researchers working in the area of third-generation networks. Postgraduate and graduate students on networking and communications courses will also find this book an insightful and valuable reference.
Inbunden, Engelska, 2002
2 606 kr
Skickas inom 5-8 vardagar
A comprehensive discussion of multiple access protocols for cellular systems and the consideration of the specific constraints and capabilities of second and third generation systems regarding the multiple access protocols. Beginning by introducing the cellular concept and discussing second and third generation cellular communication systems, including the evolution from these systems to IP-based systems, the authors then identify the requirements for and problems related to multiple access. In accordance with ETSI and 3GPP standards, a split is made into basic multiple access schemes such as CDMA, TDMA and FDMA and multiple access protocols. The pros and cons of CDMA and TDMA for third generation systems are discussed as well as medium access in GSM, GPRS and UMTS, essentially based on R-ALOHA protocols in all these systems. Data access delay and voice dropping performance is assessed and the different UTRA modes are considered. * Provides an accessible text for individuals with little prior knowledge of cellular communication systems or multiple access protocols* Provides an overview of existing material on cellular communications, multiple access protocols and a combination of the two* Presents extensive research carried out by the authors including extended packet reservation multiple access protocols for TDMA, CDMA and hybrid CDMA/TDMA air interfaces, protocol enhancements and modelling of the physical layer A valuable reference resource for researchers and engineers in the field of cellular communications and packet-based communications, as well as postgraduate and research students in this rapidly evolving field.