originating call gsm

RR conection establishment GSM/RRC connection procedure
BSSMAP call setup to MSC /MS service request/accept
Authebtication
Ciphering
CC setup
CC call proceeding
BSSMAP assignment requets from MSC to SS for voice /RANAP RAB setup
RR channel modify from BSC to BTS
IAM
ACM
CC alerting
ANM
http://www.eventhelix.com/RealtimeMantra/Telecom/GSM_Originating_Call_Flow.pdf

Location Update Procedure

Broad steps

Location Update request to VLR
Autentication

Update lcoation to HLR

Cancel location to old VLR

Insert Subsriber data

TMSI reallocation

Cipheing

Location Update Accept

http://books.google.co.in/books?id=kX3Z9ss_5P0C&pg=PA373&lpg=PA373&dq=location+update+UE+&source=web&ots=D_AiUd0bIo&sig=HioV38JDBRTVOfL71ZD9I16azHw&hl=en

Routing ae Update