Many times when we execute it we note that many entries do not have the identifier UEID (random value) or S-TMSI.
We shoud run the next MML COMMAND: DSP ALLUEBASICINFO to observe the above output.
When you run the command: DSP ALLUEBASICINFO the UE can be identified by S-TMSI or UEID, sometimes one or both are “NULL” and other times both are NULL.
Please take a look at the below examples:
Figure 1 S-TMSI has value, but UEID is NULL
Figure 2 UEID has value, but S-TMSI is NULL
Figure 3 S-TMSI and UEID are both NULL.
UEID and S-TMSI haven’t at the same time because the UEID is a random value used to identify user when the user is not assigned the S-TMSI.
1. When a user has assigned a S-TMSI, the UEID is NULL.
Figure 2. The UEID shows a random value and the S-TMSI is NULL.
Figure 3. The inter-eNodeB handover process, the UEID, S-TMSI and RRC Setup reason are all NULL because these information are not carried in the handover request message, so there is normally to result NULL.