Описание: From the editors of the highly successful WCDMA for UMTS, this new book provides a compreheive and up-to-date reference to High Speed Packet Access (HSPA) technologies for WCDMA. The editors cover both HSDPA and HSUPA, including an in-depth description and explanation of 3GPP standards, and expected performance based on simulations and first measurements. The text also discusses the impact of HSDPA and HSUPA on network dimensioning, covers applications and end-to-end performance in detail, and includes a section on radio frequency requirements and terminal design considerations. The most comprehensive and advanced guide to the HSDPA (High Speed Downlink Packet Access) and HSUPA (High Speed Uplink Packet Access) technologies and standardisation, HSDPA/HSUPA for UMTS: *Analyses the impact of HSDPA/HSUPA on network dimensioning, discussing co-existence with R99 (Release 99) and GPRS/EDGE (General Packet Radio Services/ Enhanced Data GSM Environment) *Contains a section on applications and end-to-end (e2e) performance *Includes a chapter on radio frequency (RF) requirements and terminal design considerations, covering different RF bands, multi-band HSDPA and multi-mode HSDPA+EDGE challenges, power consumption *Provides numerous illustrations of 3GPP (Third Generation Partnership Project) standards and performance This title provides excellent coverage of the area for system, element and chip designers, network planners, technical mangers with vendors, operators and application developers. It is also ideal for postgraduates and researchers in related areas.
Описание: 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.
Описание: Covers the key aspects of UMTS and its implementation from both the engineering designer and the operator and service providers` point of view. This book addresses the tasks involved in the UMTS network deployment in new regions and within existing 2G/2.5G networks. It presents solutions for the integration and coexistence of 2G and 3G systems.
Описание: This text provides a technical history of the development of GSM (Global System for Mobile Communication) standards and the early evolution of UMTS (Univerisal Mobile Telecommunicaitons System). It presents background information and descriptions of the technical features of the GSM standards.
Описание: Based on the Global System for Mobile (GSM) standard, UMTS, endorsed by major standards bodies and manufacturers, is the planned standard for mobile users around the world and is at present still being made available. Once UMTS is fully available geographically, computer and phone users can be constantly attached to the Internet as they roam, and have the same set of capabilities no matter where they travel. As researchers, developers and operators prepare for these advances, they need to have access to a resource providing cutting-edge advice on QoS and QoE management issues applied specifically to UMTS networks. This book sets out to provide state-of-the art advice on Quality of Service (QoS) and Quality of Experience (QoE) in Universal Mobile Telecommunications (UMTS) networks. The approach is comprehensive, tackling mobile service planning, provisioning, performance monitoring and optimization issues in a single, accessible resource. It includes strong sections on WCDMA QoS and QoE management functions in packet core and backbone networks. It provides a strong focus on QoS and QoE issues related to present and forthcoming application services, including multimedia messaging service (MMS), school-wide information system (SWIS), gaming, streaming and browsing. It illustrates all points with examples gleaned from state-of-the art research from around the globe. It is suitable for operators, vendors, deployers, consultants and managers specializing in the research and development of products and tools for QoS and QoE management in UMTS networks. It will also appeal to postgraduate students and researchers in the field of telecommunications and specializing in UMTS QoS and QoE principles and practice.
Описание: This book describes the physical layer of UMTS (Universal Mobile Telecommunication System) which is one of the five members of the IMT-2000 family of standards. It compiles in a clear fashion the main technical features of the physical layer standard together with a description of the basics of digital communications and spread spectrum technology on which UMTS relies. In addition the test cases specified in the standard are described together with their implications on any practical front-end design. The reader will benefit from the standard description which frees him from studying lots of standardization documents. Additional explanations of the standard and especially the test cases will help to better understand the effects on any front-end system design. Many references are provided for readers interested in in-depth treatments of certain topics.
Описание: This book presents in self-contained chapters all aspects of third generation mobile communications. The focus is on the international standards "Universal Mobile Telephony Service (UMTS)" and "International Mobile Telephony (IMT 2000)". Special emphasis is placed on the definition and implementation of new services and multimedia applications.
Автор: Bernard H. Walke Название: UMTS: The Fundamentals ISBN: 0470845570 ISBN-13(EAN): 9780470845578 Издательство: Wiley Рейтинг: Цена: 11965 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: UMTS (Universal Mobile Telecommunication System) is the third generation telecommunications system based on WCDMA. WCDMA (Wideband Code Division Multiple Access) is the radio interface for UMTS. WCDMA is characterised by use of a wider band than CDMA. It has additional advantages of high transfer rate, and increased system capacity and communication quality by statistical multiplexing, etc. WCDMA efficiently utilises the radio spectrum to provide a maximum data rate of 2 Mbit/s. UMTS (Universal Mobile Telecommunication System) will offer a consistent set of services to mobile computer and phone users no matter where they are located in the world. Based on the GSM (Global System for Mobile communication) communication standard, UMTS, endorsed by major standards bodies and manufacturers,the planned standard for mobile users around the world by 2002. Today's cellular telephone systems are mainly circuit-switched, with connections always dependent on circuit availability. Packet-switched connection, using the Internet Protocol (IP), means that a virtual connection is always available to any other end point in the network. It will also make it possible to provide new services, such as alternative billing methods (pay-per-bit, pay-per-session, flat rate, asymmetric bandwidth, and others). The higher bandwidth of UMTS also promises new services, such as video conferencing and promises to realise the Virtual Home Environment (VHE) in which a roaming user can have the same services to which the user is accustomed when at home or in the office, through a combination of transparent terrestrial and satellite connections. * Provides an introduction to cellular networks and digital communications * Covers the air interface, radio access network and core network * Explains the Release '99 specifications clearly and effectively * Discusses UMTS services and future services beyond 3G * Features numerous problems and solutions in order to aid understanding Ideal for Academics and students on telecommunications, electronics and computer science courses, research and development engineers working in mobile/wireless communications and Cellular operators and technical consultants.
Описание: Addresses the application of both IP and ATM technologies to a cellular environment, including IP telephony protocols, the use of ATM/AAL2 and the AAL2 signalling protocol for voice/multimedia and data transport. This book explains the operation and integration of GSM, GPRS, EDGE, UMTS, CDMA2000, IP, and ATM.
Автор: Valtteri Niemi Название: UMTS Security ISBN: 0470847948 ISBN-13(EAN): 9780470847947 Издательство: Wiley Рейтинг: Цена: 10528 р. Наличие на складе: Нет в наличии.
Описание: Universal Mobile Telecommunication System (UMTS) offers a consistent set of services to mobile computer and phone users and numerous different radio access technologies will co-exist within the UMTS system`s core network-security is, therefore, of the utmost importance. This work deals with this subject.
Описание: The key feature of future mobile communication systems is the ability to deliver wideband and high bit-rate multimedia services alongside the traditional radio services such as voice, messaging and slow rate data. The broad range of services expected to be supported can be divided into different Quality of Service (Qo classes. However, the provision of such mobile multimedia services under QoS guarantees will not be possible without a utilization of the air interface resources by means of Radio Resource Management (RRM) strategies that ensure the target QoS, the planned coverage area and that offer a high system capacity. Under this framework, the book focuses on the RRM concepts, including the theoretical background that serves as a basis for the description of specific RRM algorithms. The RRM problem for UMTS is presented, and more specifically, for the FDD mode, which is based on a WCDMA scheme. More specifically, the different aspects that are covered include: *Introduces the mobile communications sector and UMTS, including the evolution towards 4G systems, with an overview of the QoS concept which is key for the definition of RRM strategies *Offers a detailed description of the radio interface in UMTS, as the basis for the implementation of RRM strategies *Provides the fundamental concepts related with the development of RRM strategies in WCDMA networks *Analyses particular RRM algorithms in a variety of scenarios, trying to identify the key parameters and factors that influence their performance *Explores the evolution of UMTS towards Beyond 3G systems and the concept of Common RRM in heterogeneous networks with the aid of some algorithm examples This comprehensive title is essential reading for engineers and managers in radio engineering departments of UMTS network operators and UMTS equipment manufacturers. It will also prove insightful to researchers in the field of 3G and Beyond 3G systems and academics in any of these areas.
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