Content for TS 23.278 Word version: 17.0.0
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4.6.1.1
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4.6.1.5
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4.7.3 gsmSCF - IM-SSF information flows for MRFC related operations
4.7.3.1 Cancel
4.7.3.2 Play Announcement
4.7.3.3 Prompt And Collect User Information (received information)
4.7.3.4 Prompt And Collect User Information ack (received information)
4.7.3.5 Specialized Resource Report
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4.7.3 gsmSCF - IM-SSF information flows for MRFC related operations p. 142
In an IMS Core Network, the Multimedia Resource Function Controller (MRFC) is used for providing specialised resource functions like playing announcements and tones. Requests from the gsmSCF that requires a specialised resource function are sent to the MRFC via the IM-SSF and S-CSCF using SIP signalling as specified in the functional requirements of the MRFC found in TS 23.218.
This clause contains the information flows descriptions between the gsmSCF and the IM-SSF for MRFC-related operations.
4.7.3.1 Cancel p. 142
4.7.3.1.1 Description p. 142
This IF is used by the gsmSCF to request the IM-SSF to cancel a correlated previous operation in the MRFC.
4.7.3.1.2 Information Elements p. 143
The following information elements are used:
| Information element name | Status | Description |
|---|---|---|
| Invoke ID | M | This IE specifies the operation to be cancelled. |
4.7.3.2 Play Announcement p. 143
4.7.3.2.1 Description p. 143
This IF is sent from the gsmSCF to the IM-SSF and is used to specify information for playing announcements or tones in the MRFC.
4.7.3.2.2 Information Elements p. 143
The following information elements are required:
| Information element name | Status | Description |
|---|---|---|
| Information To Send | M | This IE indicates an announcement or a tone to be sent to the end user by the MRFC. |
| Disconnect From IP Forbidden | M | This IE indicates whether or not the MRFC may be disconnected from the user when all information has been sent. |
| Request Announcement Complete | M | This IE indicates whether or not a SpecializedResourceReport shall be sent to the gsmSCF when all information has been sent. |
Information To Send contains the following information:
| Information element name | Status | Description |
|---|---|---|
| Inband Info | C | This IE indicates the inband information to be sent. |
| Tone | C | This IE indicates the tone to be sent. The mapping from the code points of this IE to tones is a matter for agreement between the gsmSCF operator and the MRFC operator. |
Inband Info contains the following information:
| Information element name | Status | Description |
|---|---|---|
| Message ID | M | This IE is described in the next Table. |
| Number Of Repetitions | M | This IE indicates the maximum number of times the message shall be sent to the end-user. |
| Duration | O | This IE indicates the maximum duration time in seconds that the message shall be played/repeated. Zero indicates endless repetition. |
| Interval | O | This IE indicates the time interval in seconds between two repetitions. |
Message ID contains the following information:
| Information element name | Status | Description |
|---|---|---|
| Elementary Message ID | C | This IE indicates a single announcement |
| Text | C | This IE indicates a text to be sent. The text shall be transformed to inband information (speech) by the MRFC. |
| Elementary Message IDs | C | This IE indicates a sequence of announcements |
| Variable Message | C | This IE indicates an announcement with one or more variable parts. |
Tone contains the following information:
| Information element name | Status | Description |
|---|---|---|
| Tone ID | M | This IE indicates the tone to be sent. |
| Duration | O | This IE indicates the maximum duration time in seconds that the message shall be played/repeated. Zero indicates endless repetition. |
4.7.3.3 Prompt And Collect User Information (received information) p. 144
4.7.3.3.1 Description p. 144
This IF is sent from the gsmSCF to the IM-SSF and is used to interact with a call party in order to collect information.
4.7.3.3.2 Information Elements p. 144
The following information elements are required:
| Information element name | Status | Description |
|---|---|---|
| Collected Info | M | This IE is described in the next Table. |
| Information To Send | O | This IE indicates an announcement or a tone to be sent to the end user by the MRFC. |
| Disconnect From IP Forbidden | M | This IE indicates whether the MRFC may be disconnected from the user when all information has been sent. |
Collected Info contains the following information:
| Information element name | Status | Description |
|---|---|---|
| Collected Digits | M | This IE is described in the next Table. |
Collected Digits contains the following information:
| Information element name | Status | Description |
|---|---|---|
| Minimum Number Of Digits | M | This IE indicates the minimum number of valid digits to be collected. |
| Maximum Number Of Digits | M | This IE specifies the maximum number of valid digits to be collected |
| End Of Reply Digit | O | This IE indicates the digit(s) used to signal the end of input. |
| Cancel Digit | O | If this IE is present, the cancel digit can be entered by the user to request a possible retry |
| Start Digit | O | If this IE is present, the start digit(s) indicates the start of the valid digits to be collected. |
| First Digit Time Out | O | If this IE is present, the first digit shall be received before the expiration of the first digit timer expiration |
| Inter Digit Time Out | O | If this IE is present, any subsequent valid or invalid digit shall be received by the MRFC before the inter digit timer expires. |
| Error Treatment | O | This IE indicates what specific action shall be taken by the MRFC in the event of error conditions occurring. |
| Interruptable Ann Ind | O | If this IE is set to TRUE (default value) the announcement is interrupted after the first valid or invalid digit received by the MRFC. If this IE is present and explicitly set to FALSE, the announcement will not be interrupted after the first digit is received by the MRFC |
| Voice Information | O | This IE is optional, where the default value is specified being FALSE. If the VoiceInformation IE is set to FALSE, all valid or invalid digits are entered by DTMF If this IE is present and explicitly set to TRUE, calling user is required to provide all valid or invalid information by speech |
| Voice Back | O | This IE is optional, where the default value is specified being FALSE. If the VoiceBack IE is set to FALSE, no voice back information is given by the MRFC If this IE is present and explicitly set to TRUE, the valid input digits received by the MRFC will be announced back to the calling user immediately after the end of input is received |
InformationToSend is defined in clause 4.7.3.2.2.
4.7.3.4 Prompt And Collect User Information ack (received information) p. 145
4.7.3.4.1 Description p. 145
This IF is used by the IM-SSF to indicate the result a Prompt And Collect User Information IF to the gsmSCF.
4.7.3.4.2 Information Elements p. 145
The following information elements are required:
| Information element name | Status | Description |
|---|---|---|
| Digits Response | C | This IE indicates the digit sequence received from the end user |
4.7.3.5 Specialized Resource Report p. 146
4.7.3.5.1 Description p. 146
This IF is used by the IM-SSF to response to a PlayAnnouncement IF when the announcement complete indication is set.
4.7.3.5.2 Information Elements p. 146
This IF contains no information elements.
