The present document specifies the procedures used at the radio interface for normal operation, registration, erasure, activation, deactivation, invocation and interrogation of line identification supplementary services. Provision and withdrawal of supplementary services is an administrative matter between the mobile subscriber and the service provider and cause no signalling on the radio interface.
In
TS 24.010 the general aspects of the specification of supplementary services at the layer 3 radio interface are given.
3GPP
TS 24.080 specifies the formats and coding for the supplementary services.
Definitions and descriptions of supplementary services are given in
TS 22.004 and 3GPP TS 22.08x and 3GPP TS 22.09x-series.
TS 22.081 is related specially to line identification supplementary services.
Technical realization of supplementary services is described in
TS 23.011 and 3GPP TS 23.08x and 3GPP TS 23.09x-series.
TS 23.081 is related specially to line identification supplementary services.
The procedures for Call Control, Mobility Management and Radio Resource management at the layer 3 radio interface are defined in
TS 24.007 and
TS 24.008.
The following supplementary services belong to the line identification supplementary services and are described in the present document:
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Calling line identification presentation (CLIP) (clause 1);
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Calling line identification restriction (CLIR) (clause 2);
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Connected line identification presentation (COLP) (clause 3);
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Connected line identification restriction (COLR) (clause 4).
The calling line identity consists of a calling party BCD number and optionally, a calling party subaddress and/or a cause of no CLI.
The calling party BCD number information element is made up of a number of information units as indicated in
TS 24.008.
In addition to or instead of the calling party's digits, the subscriber may be given the following information:
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screening indicator;
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presentation indicator.
Indicator values are given in
TS 24.008.
The calling party subaddress information element is made up of a number of information units as indicated in
TS 24.008.
The cause of no CLI information element is made up of a detailed cause of no CLI as indicated in
TS 24.008.
A called mobile subscriber subscribing to calling line identification presentation service receives the call with the information indicated above, see
Figure 1.1.
When the calling line identity is not available, the presentation indicator which is given to the called mobile subscriber takes the value of "number not available".
Status Check
The mobile subscriber can request the status of the supplementary service and be informed if the service is provided to him.
Activation, deactivation, registration and erasure of the supplementary service calling line identification presentation are not applicable.
When calling line identification restriction is applicable, the originating network provides the destination network with a notification that the calling party's ISDN number, with possible additional address information, is not allowed to be presented to the called party.
If the called mobile user subscribes to calling line identification presentation and the calling party has calling line identification restriction applied, the called mobile party shall receive the presentation indicator showing "presentation restricted" in the calling party BCD field of the SETUP message, see
Figure 1.1. In this case, the calling party's number (digits) will not be sent towards the called subscriber.
When the CLIR presentation mode is temporary (presentation restricted), it is possible for the subscriber to present his CLI on a per call basis. The MS shall send a CLIR suppression information element to the network.
If the subscriber tries to override CLIR (i.e. requests that the CLI is displayed), when he has subscribed to permanent mode a NotifySS shall be sent to the MS in order to inform that the override has not been performed and the call set-up shall continue.
When the CLIR presentation mode is temporary (presentation allowed), it is possible for the subscriber to restrict the CLI on a per call basis. The MS shall send a CLIR invocation information element to the network.
If the subscriber has not subscribed to CLIR and tries to invoke CLIR (i.e. requests that the CLI is not displayed), the SETUP shall be rejected. The MS and the network shall act in accordance with
TS 24.008 network initiated call clearing procedure, see
Figure 2.2.
Data request
The mobile subscriber can request the data of the supplementary service.
If the service is not provisioned the network shall sent a return result including the SS-Status parameter.
If the service is provisioned the network shall sent a return result including the SS-Status and the CLI Restriction Option parameters.
Activation, deactivation, registration and erasure of the supplementary service calling line identification restriction are not applicable.
The connected line identity consists of a connected number and optionally, a connected subaddress.
The connected number is made up of a number of information units as indicated in
TS 24.008.
In addition to or instead of the connected number digits, the subscriber may be given the following information:
-
screening indicator;
-
presentation indicator.
Indicator values are given in
TS 24.008.
In the call set-up phase the calling mobile subscriber receives the information at the end of the call set-up.
The connected subaddress information element is made up of a number of information units as indicated in
TS 24.008.
A calling mobile subscriber subscribing to connected line identification presentation receives a message with the information indicated above, see
Figure 3.1.
When the connected line identity is not available (due to interworking or presentation restrictions), appropriate indication information is given to the calling mobile subscriber.
Status Check
The mobile subscriber can request the status of the supplementary service and be informed if the service is provided to him.
Activation, deactivation, registration and erasure of the supplementary service connected line identification presentation is not applicable.
When connected line identification restriction is applicable the destination network provides the originating network with a notification that the connected party's ISDN number, with possible additional address information, is not allowed to be presented to the calling party.
If the calling mobile user subscribes to connected line identification presentation and the connected party has connected line identification restriction applied, the calling mobile party shall receive the presentation indicator showing "presentation restricted", see
Figure 3.1. In this case, the connected number will not be sent towards the calling subscriber.
Status Check
The mobile subscriber can request the status of the supplementary service and be informed if the service is provided to him.
Activation, deactivation, registration and erasure of the supplementary service connected line identification restriction are not applicable.