-1
\$\begingroup\$

In several 3gpp documentation pages, it is mentioned that we use TMSI in every sim cards to identify the user in a local network. But my questions is that if we have IMSI, then why they need TMSI for the local geographical area ?

Note: If this is not the place for questions on 3GPP and mobile application framework, then please mention where I can ask these types of questions

\$\endgroup\$
1
  • 1
    \$\begingroup\$ when I googled '3gpp TMSI', the third hit started with 'The intention of TMSI is ... '. Google might be a good place to start! \$\endgroup\$
    – Neil_UK
    Commented Jan 13, 2016 at 7:39

1 Answer 1

Reset to default
1
\$\begingroup\$

Googling 'TMSI' gave me this answer straight away. Looks like a pretty convincing explanation. The key word here is privacy.

The Temporary Mobile Subscriber Identity (TMSI) is a temporary identification number that is used in the GSM network instead of the IMSI to ensure the privacy of the mobile subscriber. The TMSI prohibits tracing of the identity of a mobile subscriber by interception of the traffic on the radio link

\$\endgroup\$
2

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.