1. GSM Mohammad AL-adwan

2. Introduction GSM (Global System for Mobile Communications, originally Groupe Spécial Mobile), is a standard developed by (ETSI) to describe protocols for second generation (2G) digital cellular networks used by mobile phones.

3. 1 st Generation First use in Tokyo in 1979 Analog System FDMA Bw = 40 MHz between 800-900 MHz 832 channels 10 kbps Voice Only

4. 2nd Generation First use at end of 1980s Digital System TDMA / CDMA 384 kbps Voice and Data

5. 3rd Generation First use in 2001 Digital System WCDMA Downlink : 14.4 Mbps || Uplink : 5.8 Mbps Voice and Data

6. 4th Generation Started in 2010 but used in 2013 Digital System WCDMA Downlink : 1 Gbps || Uplink : 0.5 Gbps Voice and Data

7. 1 st Look MSC BS MS BS

8. 1 st Look MSC Mobile Switching Center is the head of the cellular communications process. Any provider must have one MSC at least.

9. 1 st Look MSC BS MS BS

10. 1 st Look BS Base Stations function is to propagate and receive EM waves. GSM is a cellular network, which means that cell phones connect to it by searching for cells in the immediate vicinity. There are five different cell sizes in a GSM network—macro, micro, pico, femto, and umbrella cells.

11. 1 st Look BS

12. Some more base station equipment Typical macro cell Typical micro cell

13. 1 st Look MSC BS MS BS

14. 1 st Look MS Mobile Stations are the mobile phones. In general any device have a GSM module and SIM card (Subscriber Identity Module).

15. Call Flow [ 2 MS’s in the same cell ]

16. Call Flow [ 2 MS’s in different cells ] MSC

17. Challenges of GSM 1.Co-Channel Interference 2.Adjacent Channel Interference

18. Co-Channel Interference Frequency Reuse

19. Co-Channel Interference

20. Adjacent Channel Interference

21. Frequency Bands In Jordan

22. Any Question ?? Thank You