The Fundamentals of Cellular Concept and System Design Wireless Communications 06-88-440-01 These...
Transcript of The Fundamentals of Cellular Concept and System Design Wireless Communications 06-88-440-01 These...
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The Fundamentals of Cellular Concept and System Design
Wireless Communications 06-88-440-01
These slides contains copyrighted materials from Prentice Hall Inc.. These figures are provided as instructor resources, and sources of these figures are:Wireless Communications and Networking, Jon W. Mark, Weihua ZhuangWireless Communications: Principles and Practice, Theodore S. Rappaport
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Single Cell
K Channels = K simultaneous UsersCapacity=K
BS
Pr
Pt
d
P r=PtG /d K
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M Small CellsCapacity= M x K
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Interference if all cells use same set of frequencies
R
R
R
1 2
3
Which cell to use?
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Single Cell
Single Cell with K channels Cluster N cells, with Each cell J = K / N channels
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Cellular Concept
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19-cell reuse example (N=19)
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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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D=R3N
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Co-channel cells for 7-cell reuse
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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