GSM (Global System for Mobile Communication) is a cellular network standard proposed in the 1990s by ETSI (European Telecommunications Standards Institute) to provide encrypted communications across multiple frequency bands for roaming, messaging, and data transmission. It uses TDM and SIM cards, with cell towers allowing coverage within networks. GSM is widely used in embedded systems through modules like Sim300 and Sim900 to enable connectivity for mobile devices, vehicles, home automation, irrigation control, and the growing Internet of Things.

1. GSM
Term paper

2. Global System For Mobile Communication
Proposed around 1990s in Europe
By European Telecommunications
Standards Institute (ETSI)

3. Features
TDMa- Time Division Multiple Access
SIM-Subscriber Identity Module
Each cell has a corresponding Network tower
multiple frequency bands of 850/900/1800/1900 MHz

4. Short Massage Service
Usage of same number in Network related Countries
Data transmission Fax transmission at speeds up to
9,600 bps currently
Encrypted conservations that cannot be tapped
Talk to a number of other parties simultaneously
Quality,Security, convenience and Roaming.

5. ARCHITECTURE

6. Time Burst
Frames
Speech Coding
Digital Modulation
Power Requirements

7. Role of GSM in Embedded Systems
Modules – Sim300, Sim900
Mobile phones.
Security Systems, school Management Systems
Controlling Home Devices, cars,trucks, ships, and
other mobile objects.
Gsm based Embedded system for irrigation.

8. Internet
of
things
Future Prospects