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

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What are all identifiers used for an UE in IMS network ?
posted Nov 7, 2015 by Harshita

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1 Answer

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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
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