10 Information stored in the HLR and in the VLR

23.0873GPPRelease 17Stage 2TSUser-to-User Signalling (UUS) supplementary service

10.1 Information stored in the HLR

The following logical states are applicable for each of the 3 Services of the User-to-user supplementary service (refer to GSM 03.11 for an explanation of the notation):

Provisioning State

Registration State

Activation State

HLR Induction State

(Not Provisioned,

Not Applicable,

Not Active,

Not Induced)


Not Applicable,

Active and operative,

Not Induced)

The HLR shall store:

– the logical state of each of the 3 services of the UUS supplementary service (which shall be one of the valid states listed above) on a per subscriber basis.

10.2 Transfer of information from HLR to VLR

If the provisioning state for the UUS services is "Provisioned" then when the subscriber registers on a VLR the HLR shall send that VLR information about the logical state of these UUS services.

If the logical state of the UUS services is changed while a subscriber is registered on a VLR then the HLR shall inform the VLR of the new logical state of the UUS services.

10.3 Information stored in the VLR

For the supplementary service UUS the VLR shall store the service state information received from the HLR.