From GSM to LTE: An Introduction to Mobile Networks and Mobile Broadband

1.12 Questions

1. Which algorithm is used to digitize a voice signal for transmission in a digital circuit-switched network and at which datarate is the voice signal transmitted?

2. Name the most important components of the GSM Network Subsystem (NSS) and their tasks.

3. Name the most important components of the GSM radio network (BSS) and their tasks.

4. How is a BTS able to communicate with several subscribers at the same time?

5. Which steps are necessary to digitize a speech signal in a mobile device before it can be sent over the GSM air interface?

6. What is a handover and which network components are involved?

7. How is the current location of a subscriber determined for a mobile-terminated call and how is the call forwarded through the network?

8. How is a subscriber authenticated in the GSM network? Why is an authentication necessary?

9. How is an SMS message exchanged between two subscribers?

10. Which tasks are performed by the RISC processor and which tasks are performed by the DSP in a mobile device?

11. How are data stored on the SIM card?

12. What is CAMEL and for which services can it be used?

Answers to these questions can be found on the companion website for this book at http://www.wirelessmoves.com.

References

[1] European Technical Standards Institute (ETSI), website, http://www.etsi.org.

[2] The 3rd Generation Partnership Project, website, http://www.3gpp.org.

[3] 3GPP, ‘Mobile Application Part (MAP) Specification’, TS 29.002.

[4] 3GPP, ‘AT Command Set for ...