Page 123 - From GMS to LTE

General Packet Radio Service (GPRS) and EDGE 109

7. What is a temporary block flow?

8. What actions are performed during an IRAU?

9. Why is IP used twice in the protocol stack of the Gn interface?

10. Why is it not necessary to change any settings on the mobile device for GPRS when
roaming abroad?

11. What is the difference between a GPRS attach and a PDP context activation?

12. Why is an APN necessary for the PDP context activation procedure?

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

References

1 3GPP, Multiplexing and Multiple Access on the Radio Path, TS 45.002, Annex B1.
2 3GPP, Radio Access Network: Channel Coding, TS 45.003.
3 Y.‐K. Chen and Y.‐B. Lin, IP Connectivity for Gateway GPRS Support Node, IEEE
Wireless Communications Magazine, 12, 37–46, February 2005.
4 3GPP, General Packet Radio Service (GPRS); Mobile Station (MS) – Base Station System
(BSS) Interface; Radio Link Control/Medium Access Control (RLC/MAC) protocol, TS 44.060.
5 3GPP, General Packet Radio Service (GPRS); GPRS Tunneling Protocol (GTP) across the
Gn and Gp Interface, TS 29.060.
6 3GPP, General Packet Radio Service (GPRS); Serving GPRS Support Node
(SGSN) – Visitors Location Register (VLR); Gs Interface Layer 3 Specification, TS 29.018.
7 3GPP, General Packet Radio Service (GPRS); Service Description; Stage 2, TS 23.060.