top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

What are all identifiers used for an UE in IMS network ?

+2 votes
538 views
What are all identifiers used for an UE in IMS network ?
posted Nov 7, 2015 by Harshita

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

IMS network uses following identifiers to identify an user in IMS network.

IMPI (IP Multimedia Private Identity) : is a unique permanently allocated global identity assigned by home network operator, used for registration, authorization, administration and accounting purposes. Every IMS user shall have one IMPI.

IMPU (IP Multimedia Public Identity) : is used by an user for requesting communications to other users. There can be multiple IMPUs per IMPI. IMPU can also be shared with another phone.

GRUU (Globally Rout-able User Agent URI) : is an identity that identifies a unique combination of IMPU and UE instance.

answer Nov 7, 2015 by Vikram Singh
Similar Questions
+1 vote
IMS: When the following response codes are used during an established IMS call session ?

Redirection (3xx), Client failure (4xx), Server failure (5xx) and Global failure (6xx) in which scenarios these codes are used ?

+3 votes
Is it necessary HSS and S-CSCF both the nodes belongs to home network for an IMS call ?

Is it possible HSS belongs to home network and S-CSCF belongs to visited network for the Cx interface ? If not then why ?

+2 votes
LTE: Why a separate default bearer is required to exchange SIP signalling messages between UE and IMS network ?

Is it mandatory to establish a separate default bearer to exchange IMS signaling messages between UE and IMS network nodes ? Can't internet default bearer be used for the same ?

+6 votes
IMS: Why is IP sec tunnel established between UE and P-CSCF ?

I was going through IMS call flow and came to know that an IP sec tunnel is established between UE and P-CSCF . I could not find out reasoning behind it.

...