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

3.15 Questions

1. What are the main differences between the GSM and UMTS radio network?

2. What advantages does the UMTS radio network have compared to previous technologies for users and network operators?

3. What were the datarates for a packet-switched connection that were offered by early Release 99 UMTS networks?

4. What does OVSF mean?

5. Why is a scrambling code used in addition to the spreading code?

6. What does ‘cell breathing’ mean?

7. What are the differences between the Cell-DCH and the Cell-FACH RRC states?

8. In which RRC states can a mobile device be in PMM connected mode?

9. How is a UMTS soft handover performed and what are the advantages and disadvantages?

10. What is an SRNS relocation?

11. How is the mobility of a user managed in Cell-FACH state?

12. What is the compressed mode used for?

13. What are the basic HSDPA concepts to increase the user datarate?

14. How is a circuit-switched voice connection handled during an ongoing HSDPA session?

15. What are the advantages of the Enhanced-DCH (E-DCH) concept?

16. Which options does the Node-B have to schedule the uplink traffic of different E-DCH mobile devices in a cell?

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

References

[1] 3GPP Release Descriptions, 3GPP, Release Descriptions.http://www.3gpp.org/ftp/Information/WORK_PLAN/Description_Releases/Accessed in 2010.

[2] 3GPP, ‘User Equipment (UE) Radio Transmission and Reception (FDD)’, TS 25.101.

[3] M. Sauter, ...