Specifications

Interface Protocols
Operating Characteristics
August 08, 2000 68P81095E55-E 3-17
Ongoing Registration
Whenever an MS contacts a system, it will transmit its unique number to the FNE.
The ID is sent to the DAP and it searches the D-HLR for the number. If the number
is located the services are confirmed (dispatch allowed/conditional allowed). If
dispatch calling is allowed, the mobile is dispatch authenticated. If the mobile is OK
the D-HLR assigns an internal tracking/billing number (IMSI) and sends it to the
MS. The MS will use the IMSI for all further dispatch call requests.
The same process occurs at the HLR for Interconnect permissions. The interconnect
HLR is queried for validity and services. The difference is the returned number is a
Temporary Mobile System Identifier (TMSI). Packet Data also uses this procedure
except a mobile IP address is assigned to the MS by the iHLR (Figure 3-14).
Figure 3-14 Ongoing Mobile Registration
MS enters area or
activates (registration)
MS sends IMSI to
FNE
A
Change
Location Area?
MS
Power OFF /
Power ON?
FNE
authentication
request?
FNE assigns ID
FNE sends ID to
MS
AAA
No
Yes
No
Yes
No
Yes
dynamic number
assingment
Mobile
identification
may change
mid-call
FNE may
request at any
time
A
Call Processing
sequence(s)
ID = TMSI - Interconnect
ID= IMSI - Dispatch/Interconnect
ID = IP Packet Data