The document provides an overview of the GSM network including its history, architecture, technical specifications, and applications. It discusses the key components of GSM including the mobile station, base station subsystem, network switching subsystem, logical and physical channels, and security features. The architecture consists of the mobile station, base station subsystem with BTS and BSC, and the network switching subsystem including the MSC, HLR, VLR, and AUC. GSM uses TDMA and FDMA and operates in the 900/1800MHz spectrum. It provides voice and data services and allows international roaming.

1. Presentation on GSM Network

3. What is GSM ? Global System for Mobile (GSM) is a second generation cellular standard developed to cater voice services and data delivery using digital modulation

5. GSM in World

6. GSM in India

8. Tele Services • Telecommunication services that enable voice communication via mobile phones • Offered services - Mobile telephony - Emergency calling

11. GSM System Architecture BSC BSC MSC MS MS MS BTS BTS BTS GMSC PSTN ISDN PDN EIR AUC HLR VLR

24. GSM Operation Speech decoding Channel decoding De-interleaving Burst Formatting De-ciphering Demodulation Modulation Ciphering Burst Formatting Interleaving Channel Coding Speech coding Radio Interface Speech Speech 13 Kbps 22.8 Kbps 22.8 Kbps 33.6 Kbps 33.6 Kbps 270.83 Kbps

25. Physical Channel

26. GSM-Frame Structure

27. Logical Channels TCH (traffic) CCH (control) BCH CCCH Dedicated 2.4 kbps 4.8 kbps 9.6 kbps FCCH(Frequency correction) SCH(Synchronization) PCH(Paging) RACH(Random Access) AGCH(Access Grant) SDCCH(Stand Alone) SACCH(Slow-associated) FACCH(Fast-associated) Half rate 11.4kbps Full rate 22.8kbps Speech Data

33. Authentication in GSM

34. Key generation and Encryption

39. Thanks !

40. Questions ?