Cellular mobile communication uses multiple access methods like TDMA, FDMA, and CDMA to allow many users to access the network simultaneously over a limited wireless spectrum. It works by dividing geographic areas into cells served by base transceiver stations and switching centers, with cellular phones communicating with the nearest base station. When users move between cells, their communication is handed off seamlessly to the new base station through the switching network to maintain the connection.

1. Cellular mobile communication

2. Cellular mobile communication
wireless communication
wired communication
FDMA TDMA
CDMA
NARROW BAND TDMA
( G S M )
GLOBAL SYSTEM FOR MOBILES

3. REGION
OF
COVERAGE
( ROC )
BTS SS
BASE
TRANSCEIVER
STATION
SUBSCRIBER
STATION

4. 7 CELL STRUCTURE

5. Telephone
Exchange
Subscriber
Line
Inter-Exchange
Junction
Mobile Switching
Centre
(MSC)
BSC BTS
MS

6. Basics: Structure
Cells
Different
Frequencies or
Codes
Base Station
Fixed transceiver
Mobile Station
Distributed transceivers
Downlink
Uplink
Handoff
Multiple Access

7. Basics: Multiple Access
Methods
Time
Frequency
Codes
TDMA: Time
Division Multiple
Access
FDMA: Frequency
Division Multiple
Access
CMDA: Code
Division Multiple
Access