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2010 | Buch

Evolution of 3G Networks

The Concept, Architecture and Realization of Mobile Networks Beyond UMTS

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Über dieses Buch

In this chapter we describe the motivation for writing this book and explain its scope. Some remarks on nomenclature are given in order to help the reader with a fast and easy start. The concept and structure of the material compiled is p- sented, followed by some hints on how to make best use of it. Finally the status of standardization, on which this book is based, is described. 1. 1 Motivation Probably the main motivation for starting to draft the script for this book, and eventually to finish it, was the desire to have a more or less complete, up-to-date overview of mobile network technology for myself, not only when starting my work in 3GPP standardization, but also continuously afterwards. I realized that some of my colleagues were in search of the same, and I extrapolated to the point where, after 3G technology is in in the field for some time, the huge, new step of development would be implemented and finally exist in reality: a manifold of s- tem designers, SW engineers, solution consultants, test personnel, field tech- cians and service staff would have to deal with the underlying architecture, c- cepts and detailed procedures. Yet, I noticed in my roughly two decades of work as a engineer (in a few diverse fields) that compact, consistent, and balanced ov- view material, suitable for the wider audience is scarce.

Inhaltsverzeichnis

Frontmatter
Chapter 1. Introduction
Abstract
In this chapter we describe the motivation for writing this book and explain its scope. Some remarks on nomenclature are given in order to help the reader with a fast and easy start. The concept and structure of the material compiled is presented, followed by some hints on how to make best use of it. Finally the status of standardization, on which this book is based, is described.
Chapter 2. Mobile Networks Evolution
Abstract
In the following part we discuss why the next, large step of development was needed in the middle of the first decade after the millenium, at a time when the 3rd generation (UMTS, and its optimizations like HSPA) had not yet taken on full speed, and the bulk of mobile communication was still voice. We state the the driving factors and requirements formulated for an evolution, and list the limitations encountered with the legacy systems. In order to provide the reader with the baseline of the evolution we present condensed views of the main tracks in standardization of mobile and fixed networks. The chapter is concluded with snapshots on standardization history and operator commitments for future deployment of the Evolved 3GPP system.
Chapter 3. Architecture of the Evolved 3GPP System
Abstract
This chapter presents the architecture of the Evolved 3GPP system, as it corresponds to the 3GPP's stage 2 specifications: that is, the arrangement of functional entities (which may, but need not always correspond to network nodes) and reference points between them. Due to the inherent complexity and variety, this is done in steps: first an overall picture is given; then the evolved radio access network and evolved core network are discussed; finally the architectures for roaming and interworking cases are presented.
Chapter 4. Main Concepts
Abstract
In this chapter we describe some fundamental concepts of LTE/SAE, elaborate on subsystems and functional components. We start with the radio access network and progress towards the core network, followed by additional network components (AAA infrastructure, policy and charging infrastructure, subscription and additional databases) and identity module in the terminal.
Obviously, the linear, sequential walk through these major components has some limitations; these have to play together, and the interfaces between them are common to the two corresponding sides. Some concepts anyway need to be spanned across several sub-parts of the system, and it is in the second part of this chapter where we elaborate on these (e.g. QoS, tracking, security, interworking in various variants).
Chapter 5. Functions and Procedures of the Evolved 3GPP System
Abstract
We elaborate here how the "internals" of the evolved 3GPP system work. We stick to the most natural order, so that it becomes visible how single, smaller steps realize these main procedures:
- access control (authentication and authorization),
- node selection sunctions,
- IP address allocation and configuration,
- initial attachment and detachment,
- intra and inter system mobility (idle and active mode),
- session handling,
- specialized procedures (ANDSF communication, service continuity, CS fallback, warning message delivery), and
- procedures for I-WLAN mobility.
Note that this chapter provides explanations on functional level. The names of procedures and messages presented here may deviate from the actual names of protocol messages.
Chapter 6. Protocol Environment
Abstract
Protocols actually implement the signaling and data exchange within a mobile network. As has been shown in preceding chapters, for the new system many new interfaces had to be introduced or enhanced. In order to carry all necessary information flows across them in a reliable and efficient manner, 3GPP's protocol designers were challenged with a huge amount of work.
In this chapter we walk through the protocols of major importance, and for each of them explain these basics:
- general concept and usage,
- protocol structure,
- protocol message structure,
- overview of supported protocol messages, plus one or two illustrative examples, and
- if felt useful, single, selected message parameters.
It is by far not feasible and also not desirable to aim for completeness with respect to the last two items in this list. The interested reader should instead consult the cited sources of information.
Backmatter
Metadaten
Titel
Evolution of 3G Networks
verfasst von
Gottfried Punz
Copyright-Jahr
2010
Verlag
Springer Vienna
Electronic ISBN
978-3-211-09440-2
Print ISBN
978-3-211-09439-6
DOI
https://doi.org/10.1007/978-3-211-09440-2

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