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9.11.3 Information flows  9.11.3.1 SEALDD Background data transfer subscription request  9.11.3.2 SEALDD Background data transfer subscription response  9.11.3.3 SEALDD Background data transfer notification  9.11.3.4 SEALDD Background data transfer update subscription request  9.11.3.5 SEALDD Background data transfer update subscription response  9.11.3.6 SEALDD Background data transfer unsubscribe request  9.11.3.7 SEALDD Background data transfer unsubscribe response  9.11.4 APIs  9.11.4.1 General  9.11.4.2 Sdd_BDT_Subscribe operation  9.11.4.3 Sdd_BDT_Notify operation  9.11.4.4 Sdd_BDT_Update operation  9.11.4.5 Sdd_BDT_Unsubscribe operation 
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9.11.3  Information flows  p. 95

9.11.3.1  SEALDD Background data transfer subscription request  p. 95

Table 9.11.3.1-1 describes the information flow from the VAL server to the SEALDD server for requesting the SEALDD background data transfer request.
Information element Status Description
VAL service IDMIdentity of the VAL service for which the background data transfer is requested.
List of VAL UE IDsO
(See NOTE)		List of VAL UE IDs for which the transfer policy applies.
VAL group IDO
(See NOTE)		VAL group ID for which the transfer policy applies.
Desired time windowODesired time window for the background data transfer.
Desired area informationODesired geographical area for the background data transfer.
Policy Selection GuidanceO List that includes guidance in selecting from multiple transfer policies provided by underlying network. Possible values include: "lowest cost", "highest throughput given maximum cost of X", etc.
If not included, local and ASP-provided policies decide one among multiple transfer policies.
Data volumeMIdentify of the data size to be stored.
NOTE:
One of these IEs shall be present in the message.
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9.11.3.2  SEALDD Background data transfer subscription response  p. 96

Table 9.11.3.2-1 describes the information flow from the SEALDD server to the VAL server.
Information element Status Description
ResultMThe result indicates success or failure.
Subscription identifierOIndicates the Background data transfer subscription identifier.
Applicable for successful result.
Granted time windowOGranted time window for the background data transfer when sending in UL direction.
Applicable for successful result.
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9.11.3.3  SEALDD Background data transfer notification  p. 96

Table 9.11.3.3-1 describes the information flow from the SEALDD server to the VAL server.
Information element Status Description
Subscription identifierMIndicates the Background data transfer subscription identifier.
List of VAL UE IDsOList of VAL UE IDs or VAL group ID.
Executed time windowsOThe actual time window the BDT data was transferred.
BDT transmission qualityOIndicates the transmission quality (e.g., QoE) when transferring the BDT data between SEALDD client and SEALDD server.
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9.11.3.4  SEALDD Background data transfer update subscription request  p. 96

Table 9.11.3.4-1 describes the information flow from the VAL server to the SEALDD server for sending the SEALDD background data transfer update subscription request.
Information element Status Description
Subscription identifierMIndicates the Background data transfer subscription identifier.
Desired time windowO
(See NOTE)		Desired time window for the background data transfer.
Desired area informationO
(See NOTE)		Desired geographical area for the background data transfer.
Policy Selection GuidanceO
(See NOTE)		 List that includes guidance in selecting from multiple transfer policies provided by underlying network. Possible values include: "lowest cost", "highest throughput given maximum cost of X", etc.
Data volumeO
(See NOTE)		Identify of the data size to be stored.
NOTE:
At least one of these IEs shall be present in the message.
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9.11.3.5  SEALDD Background data transfer update subscription response  p. 96

Table 9.11.3.5-1 describes the information flow from the SEALDD server to the VAL server for responding to the SEALDD Background data transfer update subscription request.
Information element Status Description
ResultMThe result indicates success or failure.
Granted time windowOGranted time window for the background data transfer when sending in UL direction.
Applicable for successful result.
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9.11.3.6  SEALDD Background data transfer unsubscribe request  p. 97

Table 9.11.3.6-1 describes the information flow from the VAL server to the SEALDD server for requesting the SEALDD background data transfer unsubscribe request.
Information element Status Description
Subscription identifierMIndicates the Background data transfer subscription identifier.
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9.11.3.7  SEALDD Background data transfer unsubscribe response  p. 97

Table 9.11.3.7-1 describes the information flow from the SEALDD server to the VAL server for responding to the SEALDD Background data transfer unsubscribe response.
Information element Status Description
ResultMThe result indicates success or failure of the BDT unsubscribe operation.
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9.11.4  APIs  p. 97

9.11.4.1  General  p. 97

Table 9.11.4.1-1 illustrates the APIs exposed by SEALDD server for background data transfer.
API Name API Operations Operation Semantics Consumer(s)
Sdd_BDTSubscribeSubscribe/NotifyVAL server
NotifySubscribe/NotifyVAL server
UpdateSubscribe/NotifyVAL server
UnsubscribeSubscribe/NotifyVAL server
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9.11.4.2  Sdd_BDT_Subscribe operation  p. 97

API operation name:
Sdd_BDT_Subscribe
Description:
The consumer requests for a Background data transfer service.
Inputs:
See clause 9.11.3.1.
Outputs:
See clause 9.11.3.2.
See clause 9.11.2.1 for details of usage of this operation.

9.11.4.3  Sdd_BDT_Notify operation  p. 98

API operation name:
Sdd_BDT_Notify
Description:
The consumer is notified with Background data transfer result.
Inputs:
None
Outputs:
See clause 9.11.3.3.
See clause 9.11.2.1 for details of usage of this operation.

9.11.4.4  Sdd_BDT_Update operation  p. 98

API operation name:
Subscribe
Description:
The consumer requests to subscribe to SEALDD connection status event.
Inputs:
See clause 9.2.3.7.
Outputs:
See clause 9.2.3.8.
See clause 9.2.2.6 and clause 9.3.2.3 for details of usage of this operation.

9.11.4.5  Sdd_BDT_Unsubscribe operation  p. 98

API operation name:
Sdd_BDT_Unsubscribe
Description:
The consumer requests to unsubscribe the SEALDD Background data transfer service.
Inputs:
See clause 9.11.3.6.
Outputs:
See clause 9.11.3.7.
See clause 9.11.2.3 for details of usage of this operation.

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