supports multiple IMS users.
Identity Types
The
supports the following identity types:- IP Multimedia Private Identity (IMPI) is a unique permanently allocated global identity assigned by the home network operator, and is used, for example, for Registration, Authorization, Administration, and Accounting purposes. Every IMS user shall have one IMPI.
- IP Multimedia Public Identity (IMPU) is used by any user for requesting communications to other users (e.g. this might be included on a business card). There can be multiple IMPUs per IMPI. The IMPU can also be shared with another phone, so that both are reachable using the same identity (e.g. a single phone-number for an entire family).
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| 1 | Relationship between Private and Public User Identities |
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Public identities can be grouped together to form an implicit registration set. The public identities in this set get implicitly registered via single IMS registration of one of the Public User Identity's in that set. No single public identity shall be considered as a master to the other Public User Identities. A simple diagram of implicit registration of Public User Identities is depicted below.
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Public User Identities may be shared among multiple Private User Identities within the same IMS subscription. Hence a Public User Identity may be simultaneously registered from multiple UEs that use different Private User Identities and different contact addresses.
The following relationships are possible between Public User Identities and Private User Identities in IMS deployments:
- Single Private Identity Bound to Multiple PUIDs in Implicit Set
- Single Private Identity Bound to Implicit Set Plus Additional PUID
- Multiple Private Identities Bound to Single PUID
- Multiple Private Identities Bound to Implicit Set of Multiple PUIDs
Private Identity Interrelationships to Public User Identities in IMS Deployments
Single Private Identity Bound to Multiple PUIDs in Implicit Set
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| 1 | Single Contact Bound to Implicit Set |
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Single Private Identity Bound to Implicit Set Plus Additional PUID
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| 1 | Additional Public User Identity |
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Multiple Private Identities Bound to Single PUID
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| 1 | Multiple Contacts Bound to Single PUID |
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Multiple Private Identities Bound to Implicit Set of Multiple PUIDs
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