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Informationen zum Autor Vern A. Dubendorf is the author of Wireless Data Technologies, published by Wiley. Klappentext The expansion and popularity of the Internet, along with the addition of wireless data functionality to wireless networks, has also contributed greatly to the growth of the wireless industry. In fact, the anticipated consumer demand for high bandwidth wireless data is commonly seen as the driving force behind current network upgrades and expansions. The number and types of companies aggressively investing in wireless technologies illustrate the importance of wireless data. Non-traditional telecommunications companies such as Cisco Systems, Intel, Microsoft, 3Com, and other professional services companies, are investing heavily in wireless product development and many have formed partnerships with wireless infrastructure manufacturers to help deliver wireless data services seamlessly to consumers.Written by a respected author this self-contained overview of wireless date technologies will provide a highly sought after technical reference to all those working within the main areas of Wireless Data Services.* Provides a self-contained reference which discusses the key wireless technologies including security* Presents an overview of the wireless industry and its key components such as GSM, GPRS, CDMA, TDMA, UMTS, cdma2000, and Spread Spectrum, 802.11, 15 and 16 standards* Discusses the currently hot topic of Wireless Security* Includes a Foreword by Dr Bill Hancock, Chief Security Officer, Exodus Communications/Cable & Wireless* Provides a ready reference as well as a reference to additional materials on each topicEssential reading for all staff working for Telecom companies: engineers, researchers, managers etc. Zusammenfassung Fills a gap in the market by providing a self contained reference which discusses the key wireless technologies including security. This work provides an overview of the wireless industry and its key components such as GSM, GPRS, CDMA, TDMA, UMTS, cdma2000, and Spread Spectrum, 802. Inhaltsverzeichnis Dedication xv Foreword xvii Preface xix Acknowledgments xxi 1 A History of Wireless Technologies 1 1.1 Introduction 1 1.2 Where it all began - Marconi 1 1.3 Packet Data 4 1.4 Voice Technologies 6 1.5 Cellular Technologies 6 2 Understanding Spread Spectrum Technologies 7 2.1 Introduction 7 2.2 What Spread Spectrum Does 8 2.3 How Spread Spectrum Works 9 2.3.1 Frequency Hopping 9 2.3.2 Direct Sequence 10 2.4 Frequency Hopping Spread Spectrum 10 2.5 Direct Sequence Spread Spectrum 13 3 Multiple Access Wireless Communications 17 3.1 Introduction 17 3.2 CDMA Overview 18 3.3 Introduction to CDMA 19 3.4 Principles of CDMA 20 3.5 Common Air Interface 21 3.6 Forward CDMA Channel 22 3.7 Frequency Plan 22 3.8 Transmission Parameters 22 3.9 Overhead Channels 23 3.9.1 Pilot Channel 23 3.9.2 Sync Channel 23 3.9.3 Paging Channel 24 3.9.4 Traffic Channel 24 3.10 Soft Handoff 24 3.11 Rate 25 3.12 Power Control Subchannel 25 3.13 Timing 25 3.14 Reverse CDMA Channel 25 3.14.1 Frequency Plan 26 3.14.2 Transmission Parameters 26 3.15 Signal Structure 26 3.15.1 Channelization 26 3.15.2 Separation of Users 26 3.15.3 Orthogonal Modulation 27 3.15.4 Traffic Channel 27 3.15.5 Soft Handoff 27 3.15.6 Rate 27 3.15.7 Timing 28 3.16 TDMA 28 3.16.1 TDMA Standards 29 4 GSM 31 4.1 Introduction 31 4.2 Overview 32 4.2.1 The Mobile Station (MS) 34 4.2.2 The Base Station Subsystem (BSS) 34 4.2.3 The Base Transceiver Station (BTS) 34 4.2.4 The Network Subsystem 35 4...
