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when UE send GUTI, IMSI, S-TMSI?

+1 vote
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When UE sends GUTI/STMSI to MME and what all massages are involved?

posted Apr 5, 2017 by anonymous

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2 Answers

+1 vote

UE sends IMSI during Attach Request and NW allocates a different identity to UE , that is GUTI in attach accept.
Now UE can use GUTI if it attaches again with Attach Request and Tracking Area Update Request.
S-TMSI is generally used as UE identity in the RRC Connection Request or in Paging.

answer Apr 11, 2017 by Anand Yadav
0 votes

UE sends IMSI an Attach Request message in case of initial cell selection. Network allocates a unique identity to UE, that is GUTI in attach accept. UE can use GUTI if it attaches again (stored information cell selection) with Attach Request or Tracking Area Update Request. S-TMSI is used as UE identity in the RRC Connection Request and in dedicated paging messages.

answer Jan 2, 2021 by Manje Gowda K.r.
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