1. Service Capability Exposure Function User's Guide
  2. SCEF Functional Summary
  3. Non-IP Data Delivery
  4. Support of External Group ID for NIDD

Support of External Group ID for NIDD

The group Message Delivery feature allows an SCS/AS to deliver a payload to a group of UEs. SCEF supports group message delivery for a group of UEs which are part of the same External Group ID.

The SCEF uses the SCS/AS Identifier and the External Group Identifier to determine the APN that is used to send the non-IP data to the group member UEs.

Figure 2-9 illustrates the NIDD configuration for group processing.

Figure 2-9 NIDD configuration for group processing

NIDD configuration for group processing
With the enhancement of support of external group ID, the SCEF supports the following:
  • NIDD configuration with External Group Identifier for a group of UEs.
  • NIDD configuration with External Group Identifier procedures as specified in 3GPP TS 23.682 Architecture enhancements to facilitate communications with packet data networks and applications.
  • External Group identifier for maximum of 3K UEs.
  • MT-NIDD delivery of messages to a group of UEs using External Group ID MT-NIDD delivery of messages to a group of UEs using External Group ID procedures as specified in 3GPP TS 29.122 specifications.
  • If due to message size constraint, HSS determines to segment the message then SCEF shall support segmented message.
  • SCEF follows the call flow as specified in Figure 2-9 for handling of the segmented message.
  • SCEF aggregates the MT-NIDD group message delivery response and sends a notification to the SCS/AS.

    Note:

    Buffering is not supported in MT-NIDD group message delivery.