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Synopsis
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By providing one integrated source for those interested in UMTS and its applications in networking and services, The UMTS Network and Radio Access Technology will be the key text for design engineers, operator and service providers. Researchers, postgraduates and senior undergraduates will also find it an indispensable source.
* Covers the pragmatic evolution of 2G to 3G systems e.g. GSM to UMTS
* Addresses the entire UMTS air interface specification i.e. FDD and TDD modes
* Introduces the integrated (circuit packet switching) UMTS core network architecture
* Presents the performance and management issues of UMTS
* Provides the network deployment and coverage aspects of 3G networks
Über den Autor
Excerpted from The UTMS Network and Radio Access Technology by Jonathan P. Castro. Copyright © 2001. Reprinted by permission. All rights reserved
Chapter 1 deals with concrete requirements for 3G mobile systems after summarizing the rapid growth of wireless communications and the Internet. It also outlines briefly enhancing technologies such as capacity increasing antennas, multi-user detection techniques, and software radio applications.
Chapter 2 presents the fundamentals of system analysis, e.g. multiple access options, which considers narrow-band and wide-band digital channels, as well as the background for the UTRA FDD and TDD modes. It covers signal processing aspects describing the principles of spread spectrum, modulation and spreading, the CDMA performance, PN sequences, power control and handovers. It presents the communications environments envisaged for UMTS operation and deployment. It also describes the channel models used to verify and justify the performance for the selected operating scenarios. It provides a summary of the mathematical formulation for the performance analysis results seen in the forthcoming chapters (e.g. Chapter 7).
Chapter 3 describes the UMTS development platform. It introduces its architecture top down, identifying the core and access network domains. It defines the UTRA identifiers and functions, e.g. system access control, radio channel ciphering and deciphering, mobility functions, and radio resource management and control functions. It also presents mobility management with its signaling connections and impact of mobility handling. Chapter 3 presents the UTRAN sychronization and UTRAN interfaces besides pointing out co-existing 2G/3G network issues. It also introduces the radio interface protocol architecture with its structure in terms of services and function layers. This chapter thus outlines the most relevant elements, which require technical description for design and implementation.
Chapter 4 describes the UTRA physical layer design and configuration, where we introduce all the building blocks in detail with their respective technical description and requirements. It all covers dedicated common transport channels, configuration of FEE and TDD physical channels in the uplink and downlink with their spreading and coding characteristics. Spreading and modulation, including scrambling, muliplexing and channel coding are also discussed. The chapter presents the aforementioned characteristics for the FDD and TDD separately for each mode or unified when the case applies to both.
Chapter 5 introduces the UTRA transmission system starting from the spectrum allocation, i.e. the UTRA frequency bands. It presents the radio transmission and reception aspects, describing transmitter and receiver characteristics for the User Equipment (UE) and the Base Station (BS). It describes the maximum output power and output power dynamics, out of synchronization output power handling, transmit onloff power. Details on the output RF spectrum emissions, such as occupied bandwidth and out band emission, spectrum emissions, adjacent channel leakage power ratio, spurious emissions, and transmit modulation and inter-modulation are given. The summary of examples includes a review of simulation scenarios for the coexistence of FDD/FDD when analyzing ACIR with macro-to-macro and macro-to-micro cases. Before presenting results the chapter also reviews propagation models.
Chapter 6 describes the UMTS service components. It covers the UMTS bearer architecture, concepts in quality of service for 3G systems, multimedia transmission and traffic classes in UMTS. The classes include conversational, streaming, interactive, and background types. Sensitivity to IP transmission impairments are also covered here. To provide an overview of potential applications in UMTS this chapter also summarizes service offerings and selected areas of service technology.
Chapter 7 introduces the factors that influence 3G network dimensioning. It discusses coverage and capacity trade-off in the FDD mode pointing out impacts from soft handover, power control and orthogonality deviations. It covers the analysis of parameters for multi-service traffic in PS and CS. It establishes service models starting from capacity projections, and service strategy. Cellular coverage planning issues, i.e. the coverage concept, radio network parameter assumptions for CS and PS, characteristics of CDMA cells (with its theoretical capacity and cell loading effects) constitute the essential parts of this chapter. Link budget principles for the forward and reverse links and their respective formulation are covered. In the latter part, these principles are applied to a field study. For completeness the chapter also describes briefly the dimensioning of the RNC in the UTRAN side. Chapter 7 also presents the dimensioning of the core network and transmission systems. In the last part, results of a field study are provided using hypothetical parameters to illustrate the concepts end-to-end. The illustrations correspond to dimensioning exercises carried out while optimizing 3G networks. However, the input and output values in this chapter do not necessarily reflect actual values that may be used directly while dimensioning a future UMTS network. Finally, to complete the assessment of UMTS network deployment within 2G networks like GSM, this chapter discusses briefly collocation and site sharing, as well as collocation ofantenna systems.
Chapter 8 presents issues on resource and network management. It covers radio resource management and signalling, i.e. managing power (fast and low). The conceptual aspects of network management are covered from the network management system point of view. Initial considerations for network optimization are also covered.
Chapter 9 as a prelude to future predominantly PS domain networks, covers the conceptual architecture of UMTS Release 2000 or more specifically Release 4 and 5. It starts with the evolution of R99 and discusses briefly the long term view and vision of the UMTS architecture. Then it describes the components of R00 with their corresponding interfaces or reference points. This chapter also presents an introduction to and considerations of mobility management, registration aspects, multimedia signalling, service platforms, QoS aspects, and transport issues such as the basic differences of Ipv4 and Ipv6.
