Manual

SRNS Relocation Procedure
This procedure is applicable for intra-CN or inter-CN handover procedure between HNB to HNB-GW and
HNB-GW to SGSN/MSC in core network.
The following text describes the call flow for SRNS relocation procedure on HNB-GW:
1
HNB-GW receives Relocation-Request from SGSN/MSC in case subscriber moves from Macrocell to
Femtocell in a connected mode.
2
If the request does not contain IMSI (i.e. for an emergency call), HNB-GW sends Relocation-Request-Reject
with an appropriate cause.
3
. If the request contains IMSI, HNB-GW finds the list of registered HNBs which have this IMSI in their
white-list. If there is no such HNB found, HNB-GW sends Relocation-Request-Reject with appropriate
cause.
4
If there is only one such HNB found which has this IMSI in its white-list, HNB-GW sends
Relocation-Request to this HNB.
5
If there are more than one such HNBs found which have this IMSI in their whitelist, then HNBGW looks
for Home-HNB for this IMSI. If there are more than one Home-HNB found then HNB-GW sends
Relocation-Request-Reject with appropriate cause.
6
If there are multiple HNBs registered which have this IMSI in their whitelist but only one Home-HNB
found, HNBGW sends Relocation-Request to this HNB.
RANAP Reset Procedures
This section describes the call flow for various RANAP Reset procedures supported in HNB-GW.
Following procedure call flows are described for RANAP Reset procedures between HNB, HNB-GW, and
SGSN/MSC in core network:
•
HNB Initiated RANAP Reset Procedure, on page 55
•
CN Initiated RANAP Reset Procedure, on page 56
•
HNB Initiated RANAP Reset Procedure, on page 55
HNB Initiated RANAP Reset Procedure
This procedure is applicable for HNB-initiated RANAP Reset procedure between HNB, HNB-GW, and
SGSN/MSC in core network.
The following text describes the call flow for HNB-initiated RANAP Reset procedure:
1
HNB sends RANAP-RESET command message to HNB-GW for a session.
2
HNB-GW identifies the all affected Iu connection for particular HNB and sends RESET-ACK message
to HNB.
3
HNB-GW sends SCCP_Released (SCCP-RLSD) message to CN to release the SCCP connection for each
affected Iu connection for particular HNB.
4
CN (SGSN/MSC) sends the SCCP_Release_Complete (SCCP-RLC) message to HNB-GW and release
the SCCP connection for requested HNB.
HNB-GW Administration Guide, StarOS Release 19
55
HNB Gateway in Wireless Network
RANAP Reset Procedures