2002 pearson education, inc. commercial use, distribution, or sale prohibited. wireless...

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Wireless CommunicationsPrinciples and Practice

2nd EditionT.S. Rappaport

Chapter 3: The Cellular Concept – System Design Fundamentals

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The Cellular Concept

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19-cell reuse example (N=19)

Figure 3.2 Method of locating co-channel cells in a cellular system. In this example, N = 19 (i.e., I = 3, j = 2). (Adapted from [Oet83] © IEEE.)

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Handoffs – the basics

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Umbrella Cells

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Smaller N is greater capacity

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Co-channel cells for 7-cell reuse

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AMPS Duopoly Channels

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Key Definitions for Trunked Radio

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Erlang B Trunking GOS

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Erlang B

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Erlang C

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Cells are split to add channels with no new spectrum usage

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Cell Splitting increases capacity

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Sectoring improves S/I

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Sectoring improves S/I

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In-building deployment is the next great growth phase

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The Zone Cell Concept

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Zone Cell Concept