Get started !
online LTE test
online C test

Updated or New
Site traffic (Aug-15)
GMSK modulation
Case of frequency correction burst
Solving modulation equations
One bit change
Normal duration burst



About
Feedback
Information Theory
Modulation
Multiple Access
OSI Model
Data Link layer
SS7
Word about ATM
GSM
GPRS
UMTS
WiMAX
LTE
Standard Reference
Reference books
Resources on Web
Miscellaneous
Mind Map
Perl resources
Magic MSC tool
Bar graph tool
C programming
ASCII table
Project Management
Simple Google box
HTML characters
Site traffic
Page view counter
5 6 9 , 6 5 9
another knowledge site

UMTS (Bit about MM/GMM mobility) - 24

Bit about MM/GMM mobility [Under UMTS]

Previous articles were mainly related to radio access of UMTS. UMTS keeps basic NAS protocols same (with few additions); in fact this is apparent in network architecture wherein MSC/SGSN is continued from GSM/GPRS.

As seen in earlier articles, UMTS introduce cell level mobility handling in RRC connected mode. So what happen to mobility that is being handled by MM/GMM. Mobility is continued to be handled in terms of LA/RA during RRC idle mode. It is interesting to see RRC state and MM/GMM state transitions. An example of these transitions is given below (you want also want to refer GMM state transitions diagram).

As mentioned earlier, NAS procedures remain mostly same as their GSM/GPRS counterparts. In next article, we will take a look at inter-SGSN RA update as an example (we will not much look at network side exchanges; we will only mention the steps).

References: UMTS by Sanchez and Thioune, and WCDMA for UMTS by Holma and Toskala.

Copyright © Samir Amberkar 2010§

Radio bearer establishment « UMTS Index » Inter-SGSN RA/LA update