Cellular networks

Scheme Of Presentation ,[object Object],[object Object],[object Object],[object Object]

INTRODUCTION ,[object Object],[object Object],[object Object],[object Object]

Building Blocks – before GSM ,[object Object],[object Object],[object Object]

First Mobile Telephone System One high power base station with which all users communicate Wired connection Entire Coverage Area

Problem with Original Design ,[object Object],[object Object]

Core Idea: Cellular Concept ,[object Object],[object Object],[object Object]

Cellular Concept ,[object Object],[object Object],[object Object]

4 Core Principles ,[object Object],[object Object],[object Object],[object Object]

Circular Coverage Areas ,[object Object],Users located outside some distance to base station receive weak signal Result: base station has circular coverage area Weak signal Strong signal

Thus the Name Cellular ,[object Object],[object Object],Base Station

Handoffs ,[object Object],[object Object],[object Object],[object Object],[object Object]

Frequency Reuse ,[object Object],[object Object],[object Object],[object Object]

Frequency Reuse (Cont’d) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Example of Frequency Reuse ,[object Object]

[object Object],[object Object],[object Object],[object Object]

System Architecture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Cellular networks

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Cellular networks