Introduction to Wireless Local Loop: Broadband and Narrowband Systems (2nd Edition)
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Featuring developing technologies, updated market forecasts, and current regulatory initiatives, this text aims to keep the reader at the forefront of emerging products, services and issues affecting the field of wireless local loop (WLL) technology. The second edition includes new chapters on WLL deployment, the WLL market, and a substantial review of broadband technologies, as well as new sections on prediction of user requirements and the emerging UMTS standard.
their own right; indeed, books are available on many of the topics. This chapter is intended only to provide sufficient information that WLL operators will be able to better understand the competition they face. An overview of the different access technologies is provided in Figure 3.1. The key technologies are explained in more detail throughout this chapter. 23 24 Voice Computer xDSL PTO Television VoD High-speed Internet Power-line technology Fixed/mobile integration WLL Broadband
represent high-spending, high-value markets. In these countries, telecommunications operators have been able to match demand for the installation of new lines, typically have installed digital exchanges, and frequently increase their service offerings. California represents an interesting extreme, where demand has recently outstripped supply due to rapid growth in Internet access. For the purposes of this analysis, it is instructive to split this category further into countries where the
networks cause massive disruption as streets are dug up, traffic disrupted, and environmental damage caused (e.g., the cutting of tree roots). Wireline networks take many tens of years to develop for the whole country, so the competitive pressures are slow to emerge. Governments, therefore, will want to encourage WLL operators by providing Telecommunications environments worldwide 55 spectrum and licenses on favorable terms and generally helping when and where possible. Although the
clear that there would eventually be a demand for a second-generation digital system. ETSI started a standardization program long before the need appeared, resulting in GSM arriving on time (more or less). WLL just appeared one day, as was recounted in Chapter 4. Nobody had time to perform any standardization activity before the product was Overview of technologies 159 available. Once the product was available, standardizing that product was almost impossible because each manufacturer wanted
it would be viable, given the experience around the world, but pressure and incentives from the Japanese government are thought to have persuaded some that the market would be different this time. As a result of this roller-coaster ride, PHS was in the ascendancy as a WLL technology during the early part of 1998 and then started to lose its sparkle during the latter part of 1998. It is now expected that it will only achieve a small fraction of the sales that DECT will achieve in WLL deployments.