What could be the reason of IMSI got corrupted and UE Miss the Paging?

CORE
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1

Hi Experts.

What could be the reason of IMSI got corrupted and UE Miss the Paging?

2

TMSI or IMSI?

3

IMSI.

4

When paging occurs, an identifier of the paged device, called paging identifier, is carried in the paging message. Thus, only the device whose identifier matches the paging identifier will respond to the network.

Another privacy enhancement in 5G paging procedure comes from a change in “what” this paging identifier is.

Firstly, the I-RNTI is a temporary identifier used by a radio access network. Its use as the paging identifier is a new feature in 5G compared to 4G. And by design, this I-RNTI is made for one-time use i.e. it is compulsory to refresh the I-RNTI after every use.

Secondly, the 5G-S-TMSI is a temporary identifier used by a core network. And 5G enforces a stricter policy for refreshing this 5G-S-TMSI., on 5G networks it becomes compulsory to refresh the 5G-S-TMSI. Furthermore, it is also compulsory to allocate new 5G-S-TMSI at initial registration and mobility registration update procedures.