Nhss_ImsUECM_Registration

This service operation registers the serving S-CSCF assigned to an IMS User. If authentication is not to be performed, this operation also sets the registration state. The S-CSCF is implicitly subscribed to be notified when it is deregistered in HSS. This notification is done by means of Nhss_ImsUECM_DeregistrationNotification operation.

Public Identity, S-CSCF name, Registration Type (e.g. Initial Registration, Unregistered).

Private Identity.

Result indication.

List of registered Private Identities sharing the same Public Identity which is being registered, S-CSCF Restoration indication.

Nhss_ImsUECM_Deregistration

This service operation deregisters the S-CSCF allocated to a public identity.

S-CSCF name, Deregistration Type.

User Identity (Private Identity and/or Public Identity), P-CSCF Restoration indication, Session Priority.

Result indication.

None.

Nhss_ImsUECM_DeregistrationNotification

This service operation enables HSS to inform a S-CSCF which has previously registered in HSS of a Public Identity deregistration. This notification corresponds to an implicit subscription.

Private Identity, Reason for Deregistration.

Public Identity, Associated Private Identities.

Result indication.

Associated Private Identities, Identities with Emergency Registration.

Nhss_ImsUECM_Authorize

This service operation is used by the I-CSCF to request authorization from HSS for:

• The registration of a Public Identity by a UE in a P-CSCF network identifier according to the IMS User's subscription and operator limitations/restrictions.
• The reception of a terminating request based on the user state and IMS user's subscription (e.g. IMS User's barring status).

If the IMS User is authorized, the HSS may provide the address of the S-CSCF assigned to the Public Identity if any. Additionally, this service operation is used to authorize in HSS a S-CSCF reselection (e.g. after I-CSCF detection if a S-CSCF failure).

Public Identity, Authorization Type.

Private User Identity, P-CSCF network identifier.

Result indication.

S-CSCF name.

Nhss_ImsUECM_Update

This service operation updates the registration state of a Public Identity or Private Identity in HSS i.e. to update the registration state from Not Registered or Unregistered to Registered state.

Public Identity, S-CSCF name.

Private Identity.

Result indication.

None.

Nhss_ImsUECM_RestorationInfoGet

This service operation is used between the S-CSCF and the HSS to retrieve information from HSS to support the S-CSCF procedures.

Public Identity.

Private Identity.

Result Indication.

Restoration data.

Nhss_ImsUECM_RestorationInfoUpdate

This service operation is used between the S-CSCF and the HSS to update information in HSS to support the S-CSCF Restoration procedures.

Private Identity, Public Identity, Restoration data.

None.

Result indication.

None.

Nhss_ImsSDM_Get

This service operation enables the NF consumer to fetch the service profile data, repository data, and non-transparent data references for an IMS User.

NF Type, IMS Subscriber data type(s), Key for each IMS Subscriber data type(s).

Application Service Identity.

Result indication.

Requested Data.

Nhss_ImsSDM_Subscribe

The NF consumer subscribes for updates to requested data. HSS shall check that the requested NF consumer is authorized to subscribe to requested updates.

NF Type, IMS Subscriber data type(s), Key for each IMS Subscriber data type(s).

Application Server Identity.

When the subscription is accepted: Subscription Correlation ID.

None.

Nhss_ImsSDM_Unsubscribe

The NF consumer unsubscribes for updates to Requested data.

Subscription Correlation ID.

None.

Result.

None.

Nhss_ImsSDM_Notification

This service operation enables HSS to notify a NF of any changes to what the NF subscribed to.

IMS Subscriber data type(s), Key for each IMS Subscriber data type(s).

None.

Result indication.

None.

Nhss_ImsSDM_Update

The NF consumer updates HSS subscription data if authorized to do so.

NF Type, IMS Subscriber data type(s), Key for each IMS Subscriber data type(s).

Application Service Identity.

Result.

None.

Nhss_ImsUEAuthenticate_Get

This service operation is used between the S-CSCF and the HSS to exchange information to support the authentication between the end user and the home IMS network.

Private User Identity, Public User Identity, Authentication Data (Authentication Scheme).

Authentication Data (Authentication Context, Authorization Information).

Result Indication.

User Identity, Authentication Data (e.g. AV).

Nimsas_SessionEventControl_Notify

This service operation enables IMS AS to notify consumers of session events related to a specific served IMS subscriber requesting use of IMS data channel media.

Session ID, Event ID, Session ID is the identity of the IMS session for which the event relates to. Event ID is the event triggered within the IMS session.

Calling ID, Called ID, Session case, Event initiator, Media info list. Calling ID is the public identity of the calling IMS subscriber. Called ID is the public identity of the called IMS Subscriber. Session case indicates if this is an originating or terminating IMS session. Event initiator indicates initiator of the event, i.e. 'served IMS subscriber' vs 'remote IMS subscriber'. Media info list includes for each media in the list:

• media ID: uniquely identifies this media item within the list. The identity is allocated by IMS AS,
• media specification: This depends on media type including relevant media attributes of interest to the consumer. The media specification includes the following media description attributes:
  • Media Type: Data_Channel, Audio, or Video.
    When the media type is Data Channel, the elements below are derived from the SDP received by the IMS AS in an SIP INVITE or a re-INVITE related to an IMS Data Channel and the corresponding DTLS connection.
    • Data Channel Mapping and Configuration Information: This attribute is applicable to Data Channel and includes relevant configuration Information, including the stream ID of the Data Channel.
    • Maximum Message Size: This attribute defines the maximum size to be expected.
    • Data Channel Port: This attribute identifies the port for the Data Channel.
    • Security Setup: This attribute identifies the security set up of the DTLS connection.
    • Security Certificate Fingerprint: This attribute identifies the security certificate fingerprint.
    • Security Transport Identity: This attribute identifies transport layer identity.

Result indication.

None.

This service enables the consumer to control IMS AS handling of media flow within an IMS session. The service can be used by the consumer before responding to a Nimsas_SessionEventControl_Notity request.

Nimsas_MediaControl_MediaInstruction

This operation provides instructions to the IMS AS for all media flows a consumer wants to control based on its policies for the received IMS session event, and that may require resource reservation in media resource e.g. MF or MRF. For the case when a specific media flow needs to be terminated in MF media resource (i.e. termination of a Data Channel media descriptor offered by one of the IMS subscribers) or originated by the MF or MRF (i.e. origination of a data channel media descriptor to be offered towards one of the IMS subscribers), the consumer must provide a complete MF media specification including information required by MF to know how to terminate or originate the media flow.

Session ID, Media instruction set Session ID specifies the IMS session for which the MediaInstruction operation applies. Media instruction set includes a set of instructions for each media flow to control. Each instruction includes:

• media ID: used by the producer (IMS AS) and the consumer for referencing purposes. The consumer reuses the media ID it received from the IMS AS for referencing the same media. This field will be null for instructions related to originating new media.
• Media resource capability: Identify the Media Resource capabilities the Media instruction is intended for (e.g. DCMF, ARMF).
• Media instruction: includes instructions to the producer (IMS AS) for handling the media. The following instructions are supported:
  • "TerminateMedia": Terminate the offered media descriptor of the UE in the mediaResource, i.e. this media descriptor will not be exposed to the other UE.
  • "OriginateMedia": Originate and offer a media descriptor from the mediaResource to the UE. The media ID representing the new media flow will be provided by the IMS AS in the response.
  • "TerminateAndOriginateMedia": Terminate the offered media flow in the mediaResource from the UE and originate the same media flow from the mediaResource to the other UE, i.e. the offered media descriptor of the originating UE will be replaced by the mediaResource provided media descriptor, which is sent towards the other UE.
  • "UpdateMedia": Update a media flow of the mediaResource previously allocated by the instructions "TerminateMedia", "OriginateMedia" and "TerminateAndOriginateMedia"
  • "DeleteMedia": Delete a media flow of the mediaResource previously allocated by the instructions "TerminateMedia", "OriginateMedia" and "TerminateAndOriginateMedia".
  • "RejectMedia": Remove an offered media flow, i.e. the offered media descriptor will be removed both from the offer sent to the remote UE and from the answer returned to the initiator of the offer.
• DC Media Specification: Description of additional media specification information needed for data channel media stream from application layer, which includes:
  • Media proxy configuration (HTTP or UDP) applicable to the media flow.
  • MDC1/MDC2 media endpoint address of the application layer.
  • Replacement HTTP URL per stream ID allocated by the application layer representing the application list (e.g. graphical user interface) provided to the IMS subscriber via the MDC1 interface.
  • Data Channel Mapping and Configuration information when originating/terminating data channel media flows on the Mb interface.
• AR Media Specification: Description of additional media specification information needed for AR communication services from application layer, which includes:
  • Media Processing Specification: It specifies the how the media stream should be processed.

None.

None.

operation result indication.

media resource information set: This set includes entries corresponding to each instruction in the received media instruction set. Each entry in the set includes the media ID (same as received or new for new media) and includes the media type according to SDP. Each entry may optionally contain DC Media Specification and/or AR Media Specification. The DC Media Specification shall exist only with media type "DC" and contains additional media resource information, e.g. allocated media address for MDC2 interface when an offer must be provided to Data Channel Application Server. The AR Media Specification contains media processing instruction for MF on how to process the media.

This service enables the consumer to create, update and delete media resources related to IMS Data Channel. The media resource represents a media context including one or multiple media terminations. A media termination includes media resources for one or multiple media streams on the Mb interface. Each media stream is identified by a media ID.

Nmf_MRM_Create

The consumer NF requests the MF to create a media context including one or multiple media terminations and reserve media resources for one or multiple media streams of Mb interface in each termination. The consumer NF may also include media resource descriptions requested by the upper layer, e.g. DCSF, to be reserved on the MF.

List of Media Termination Descriptors. Each Media Termination Descriptor of the list includes:

• List of Media Stream Descriptors belonging to the Termination.

Each Media Stream Descriptor of the list includes:

• Media ID: A unique identity of the media stream within the media context instance. The MediaID value is set by the consumer.
• Remote Mb Specification: Media Specification specifying SDP parameters of a media endpoint e.g. IP address and ports of the UE. This parameter is used to establish IMS DC or audio/video media path between MF and UE.
• Media Specifications:
  • Media Type: Identify the media type the Media instruction is intended for (e.g. DC, AR).

If the Media Type is "DC":

• DC Media Specification: Description of additional media specification information needed for data channel media stream from application layer, which includes:
  • Media proxy configuration (HTTP or UDP) applicable to the media flow.
  • MDC1/MDC2 media endpoint address.
  • Replacement HTTP URL per Stream ID allocated by the application layer representing the application list (e.g. graphical user interface) provided to the IMS subscriber via the MDC1 interface.

If the Media Type is "AR":

• AR Media Specification: Description of additional media specification information needed for AR communication services from application layer, which includes:
  • Media Processing Specification: It specifies the how the media stream should be processed.

None.

Result indication, Media Resource Context ID, List of allocated Media Termination Descriptor Resource information. Media Resource Context ID uniquely identifies the media resources created by the MF. This identity shall be used as reference when updating or deleting the created media resource. List of allocated Media Termination Descriptor Resource information includes one or multiple Media Termination Descriptor resources allocated. The list will include same number of terminations, in the same order as provided in the request. Media Termination Descriptor Resource includes:

• Termination ID: Unique identity allocated by the consumer. The identity shall be used when updating/deleting the Media Termination.
• List of Media Stream Descriptor Resource information elements allocated within the media termination.

Media Stream Descriptor resource information includes:

• Media ID: Unique identity of the media stream within the media context instance allocated by the consumer.
• Local Mb Specification: Media specification specifying SDP parameters representing the media endpoint of the provider e.g. IP address and ports used in SDP response etc.
• DC Media Resource Description: Optional application specific media resource specification specifying the information of data channel, which includes:
• MF MDC1/MDC2 media point information (IP address/port number, etc.) which shall be relayed to the DCSF by the consumer NF.

None.

Nmf_MRM_Update

The consumer NF requests the MF to update one or multiple media resources within a specific media resource context. Terminations and/or Media Streams can be added, modified or deleted within an Update request.

Media Resource Context ID, List of Media Termination Descriptors to be updated. Media Resource Context ID specifies the media context resource to be updated. List of Media Termination Descriptors includes one of multiple updated Media Stream Descriptors, which provides the media stream information that needs to be updated.

None.

Result indication, List of Media Termination Descriptor Resource information. List of Media Termination Descriptors includes one or multiple updated Media Stream Descriptors, which provides the media stream information that needs to be updated.

None.

Nmf_MRM_Delete

The consumer NF requests the MF to delete a specific media context resource including all existing terminations and media streams.

Media Context Resource ID. Media Context Resource ID specifies the media context resource to be deleted.

None.

Result indication.

None.