Content for TS 23.278 Word version: 18.0.0
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4.6.1.1
4.6.1.2
4.6.1.3
4.6.1.4
4.6.1.5
4.6.1.6
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4.7.2…
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4.7.2 gsmSCF to IM-SSF information flows
4.7.2.1 Activity Test
4.7.2.2 Apply Charging
4.7.2.3 Call Information Request
4.7.2.4 Cancel
4.7.2.5 Connect
4.7.2.6 Connect To Resource
4.7.2.7 Continue
4.7.2.8 Continue With Argument
4.7.2.9 Disconnect Forward Connection
4.7.2.10 Furnish Charging Information
4.7.2.11 Release Call
4.7.2.12 Request Report BCSM Event
4.7.2.13 Reset Timer
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4.7.2 gsmSCF to IM-SSF information flows p. 137
4.7.2.1 Activity Test p. 137
4.7.2.1.1 Description p. 137
This IF is used to check for the continued existence of a relationship between the gsmSCF and IM-SSF. If the relationship is still in existence, then the IM-SSF will respond. If no reply is received, then the gsmSCF will assume that the IM-SSF has failed in some way and will take the appropriate action.
4.7.2.1.2 Information Elements p. 137
This IF contains no information elements.
4.7.2.2 Apply Charging p. 137
4.7.2.2.1 Description p. 137
This IF is used for interacting from the gsmSCF with the IM-SSF charging mechanisms to control the call duration.
4.7.2.2.2 Information Elements p. 137
| Information element name | Status | Description |
|---|---|---|
| ACh Billing Charging Characteristics | M | This IE specifies the charging related information to be provided by the IM-SSF and the conditions on which this information has to be provided back to the gsmSCF. |
| Party To Charge | M | This IE shall be reflected in the corresponding IE of the Apply Charging Report operation. This IE has no effect on the charging procedures in the MSC. |
ACh Billing Charging Characteristics contains the following information:
| Information element name | Status | Description |
|---|---|---|
| Time Duration Charging | M | This IE is described in the next table. |
Time Duration Charging contains the following information:
| Information element name | Status | Description |
|---|---|---|
| Max Call Period Duration | M | This IE indicates the maximum call period duration timer. |
| Tariff Switch Interval | O | This IE indicates the tariff switch time until the next tariff switch applies. |
| Release If Duration Exceeded | O | This IE indicates that the call shall be released when the Max call Period Duration expires, with a warning tone if the Play Tone IE is present. The cause used in the release message shall be "normal unspecified". Default is to continue the call. |
| Play Tone | O | This IE is set if a tone has to be played to the party for whom the BCSM is operating. If present, this IE indicates that 30 seconds before the Max Call Period Duration timer expires, a triple tone of 900 Hz (200 milliseconds tone, 200 milliseconds pause) shall be played. |
4.7.2.3 Call Information Request p. 138
4.7.2.3.1 Description p. 138
This IF is used to request the IM-SSF to record specific information about a single call and report it to the gsmSCF (with a CallInformationReport).
4.7.2.3.2 Information Elements p. 138
| Information element name | Status | Description |
|---|---|---|
| Requested Information Type List | M | This IE specifies a list of specific items of information which are requested. |
| Leg ID | M | This IE indicates the party in the call for which information shall be collected. |
Requested Information Type List contains the following information:
| Information element name | Status | Description |
|---|---|---|
| Call Attempt Elapsed Time | O | This IE indicates that the Call Attempt Elapsed Time is requested in the Call Information Report. Call Attempt Elapsed Time is the duration between the end of the CAMEL processing initiating call setup (Connect, Continue or Continue With Argument IF) and the received answer indication from the called party side. For the Calling Party, the value of Call Attempt Elapsed Time in the Call Information Report shall be set to 0. |
| Call Stop Time | O | This IE indicates that the Call Stop Time is requested in the Call Information Report. Call Stop Time is the time stamp when the connection is released. |
| Call Connected Elapsed Time | O | This IE indicates that the Call Connected Elapsed Time is requested in the Call Information Report. Call Connected Elapsed Time is the duration between the received answer indication from the called party side and the release of the connection. For a Calling Party, it indicates the duration between the sending of IDP and the release of that party |
| Release Cause | O | This IE indicates that the Release Cause is requested in the Call Information Report. Release Cause is the release cause for the call. |
4.7.2.4 Cancel p. 138
4.7.2.4.1 Description p. 138
This IF is used by the gsmSCF to request the IM-SSF to cancel all EDPs and reports.
4.7.2.4.2 Information Elements p. 138
| Information element name | Status | Description |
|---|---|---|
| All Requests | M | This IE indicates that all active requests for EventReportBCSM, ApplyChargingReport and CallInformationReport shall be cancelled. |
4.7.2.5 Connect p. 139
4.7.2.5.1 Description p. 139
This IF is used to request the IM-SSF to perform the call processing actions to route a call to a specific destination. To do so, the IM-SSF may use destination information from the calling party and existing call set-up information depending on the information provided by the gsmSCF.
4.7.2.5.2 Information Elements p. 139
| Information element name | Status | Description |
|---|---|---|
| Calling Party Category | O | This IE indicates the type of calling party (e.g., operator, pay phone, ordinary subscriber). |
| Destination Routing Address | E1 | This IE contains the called party number towards which the call is to be routed using an ISDN value. |
| Destination Routing Address URL | E1 | This IE contains the called party number towards which the call is to be routed using a SIP URL. |
| Original Called Party ID | O,E2 | This contains the original destination number if the call has been forwarded on route to the IM-SSF or is forwarded by the gsmSCF. This IE shall use an ISDN value to identify the original destination number. |
| Original Called Party URL | O,E2 | This contains the original destination number if the call has been forwarded on route to the IM-SSF or is forwarded by the gsmSCF. This IE shall use a SIP URL to identify the original destination number. |
| Redirecting Party ID | O,E3 | This IE indicates the directory number the call was redirected from. This IE shall use an ISDN value to identify the redirecting party. |
| Redirecting Party URL | O,E3 | This IE indicates the directory number the call was redirected from. This IE shall use a SIP URL to identify the redirecting party. |
4.7.2.6 Connect To Resource p. 139
4.7.2.6.1 Description p. 139
This IF is used to connect a call from the IM-SSF to MRFC via S-CSCF.
4.7.2.6.2 Information Elements p. 139
This IF requires no information elements for IMS.
4.7.2.7 Continue p. 139
4.7.2.7.1 Description p. 139
This IF requests the IM-SSF to proceed with call processing at the DP at which it previously suspended call processing to await gsmSCF instructions. The IM-SSF completes DP processing, and continues basic call processing (i.e. proceeds to the next point in call in the BCSM) without substituting new data from the gsmSCF.
4.7.2.7.2 Information Elements p. 139
This IF contains no information elements.
4.7.2.8 Continue With Argument p. 140
4.7.2.8.1 Description p. 140
This information flow requests the IM-SSF to proceed the call processing with modified information at the DP at which it previously suspended call processing to await gsmSCF instructions. The IM-SSF completes DP processing, and continues basic call processing (i.e. proceeds to the next point in call in the BCSM) with the modified call setup information as received from the gsmSCF.
4.7.2.8.2 Information Elements p. 140
| Information element name | Status | Description |
|---|---|---|
| Calling Party Category | O | This IE indicates the type of calling party (e.g., operator, pay phone, ordinary subscriber). |
4.7.2.9 Disconnect Forward Connection p. 140
4.7.2.9.1 Description p. 140
This IF is used to disconnect a connection with a MRFC previously established with a Connect To Resource IF.
4.7.2.9.2 Information Elements p. 140
This IF contains no information elements.
4.7.2.10 Furnish Charging Information p. 140
4.7.2.10.1 Description p. 140
This IF is used to request the IM-SSF to include call related information in the CAMEL specific logical call record. The logical call record is created when FCI is received and a logical call record for that leg does not exist. For modelling purposes the logical call record is buffered in the IM-SSF. The IM-SSF completes logical call records as defined in the SDLs. Once the logical call record is completed, then its free format data is moved to the corresponding CDR and the logical call record is deleted.
The CSE can send multiple concatenated FCIs per leg for completion. The total maximum of free format data is 160 octets per leg. The 160 octets may be sent in one or more FCI operations. If there is non-completed free format data and new FCI operation(s) is/are received to overwrite the non-completed data, then the non-completed data is discarded and the gsmSCF can send another 160 octets per leg. The SDLs of TS 23.078 Rel-99 define when Logical CDRs are completed. After the completion the gsmSCF can send another 160 octets of free format data in one or more FCI operations for the called leg.
4.7.2.10.2 Information Elements p. 140
| Information element name | Status | Description |
|---|---|---|
| FCI Billing Charging Characteristics | M | This IE is described in the next Table. |
FCI Billing Charging Characteristics contains the following information:
| Information element name | Status | Description |
|---|---|---|
| FCIBCCCAMEL Sequence 1 | M | This IE is described in the next Table. |
FCIBCCCAMEL Sequence 1 contains the following information:
| Information element name | Status | Description |
|---|---|---|
| Free Format Data | M | This IE is a free format data to be inserted in the CAMEL logical call record. |
| Party To Charge | M | This IE indicates the party for whom a CAMEL logical call record will be created. |
| Append Free Format Data | O |
This IE indicates that the IM-SSF shall append the free format data to the Logical call record.
|
4.7.2.11 Release Call p. 141
4.7.2.11.1 Description p. 141
This IF is used to tear down by the gsmSCF an existing call at any phase of the call for all parties involved in the call.
4.7.2.11.2 Information Elements p. 141
The following information elements are required:
| Information element name | Status | Description |
|---|---|---|
| Release Cause | M | A number giving an indication to the IM-SSF about the reason of releasing this specific call. This may be used by MSC/GMSC for generating specific tones to the different parties in the call or to fill in the "cause" in the release message. |
4.7.2.12 Request Report BCSM Event p. 141
4.7.2.12.1 Description p. 141
This IF is used to request the IM-SSF to monitor for a call-related event, then send a notification back to the gsmSCF when the event is detected (see Event Report BCSM).
4.7.2.12.2 Information Elements p. 141
| Information element name | Status | Description |
|---|---|---|
| BCSM Event | M | This IE specifies the event or events of which a report is requested. |
BCSM Event contains the following information:
| Information element name | Status | Description |
|---|---|---|
| Event type | M | This IE specifies the type of event of which a report is requested. |
| Leg ID | C | This IE indicates the party in the call for which the event shall be reported. |
| Monitor Mode | M | When this IE is "interrupted", the event shall be reported as a request, if it is "notifyAndContinue", the event shall be reported as a notification, if the IE is "transparent", the event shall not be reported. |
| DP Specific Criteria | O | This IE is described in the next Table. |
DP Specific Criteria is defined as:
| Information element name | Status | Description |
|---|---|---|
| Application Timer | O | This IE carries additional timer duration information (timer values for No Answer event) required for arming No_Answer EDPs in the IM-SSF. The TNRy timer (value defined between 10 s and 40 s) shall be shorter than the network no answer timer. |
|
NOTE:
If a Request Report BCSM Event information flow overwrites previous Request Report BCSM Event information flow which contained Application Timer IE for No_Answer DP, the behaviour of the IM-SSF is unpredictable.
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4.7.2.13 Reset Timer p. 142
4.7.2.13.1 Description p. 142
This IF is used to refresh a timer.
4.7.2.13.2 Information Elements p. 142
| Information element name | Status | Description |
|---|---|---|
| Timer Value | M | This IE specifies the value to which the indicated timer shall be set. |
| Timer ID | O | This IE indicates which timer shall be reset. It shall be set to "Tssf". |
