Network Initiated Iu Connection Release Procedure - Cisco ASR 5000 Series Administration Manual

HNB Gateway in UMTS Network
6. The HNB-GW uses the information received in Direct Transfer procedure from CN and forwards the same to
HNB through RUA-DIRECT-TRANSFER message.
7. On successful acceptance of RUA-DIRECT-TRANSFER message the HNB responds to HNB-GW and sends
RUA-DIRECT-TRANSFER Response message to HNB-GW.
8. On reception of successful acceptance of RUA-DIRECT-TRANSFER message from HNB, the HNB-GW sends
SCCP-DATA-FORM1 (Direct Transfer) Response message to CN (SGSN/MSC). This completes the
establishment of Iuh and Iu-PS/CS connection through HNB, HNB-GW, and SGSN/MSC in core network.

Network Initiated Iu Connection Release Procedure

This procedure is applicable for release of Iuh and Iu-PS/CS connection between HNB to HNB-GW and HNB-GW to
SGSN/MSC in core network.
The following figure and the text that follows describe the message flow for an Iu connection release procedure initiated
by CN (SGSN/MSC).
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