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HNB Gateway in Wireless Network
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
CN Initiated RANAP Reset Procedure
HNB-GW Initiated RANAP Reset Procedure
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.
CN 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. CN (SGSN/MSC) sends RANAP-RESET command message to HNB-GW for a session.
2. On receiving RANAP-RESET from CN, the HNB-GW starts Guard timer for configured timeout duration.
3. HNB-GW identifies the all affected Iu connections and sends RUA-DISCONNECT message to HNB.
4. On expiry of Guard timer the HNB-GW sends the RESET-ACK message to CN.
HNB-GW Initiated RANAP Reset Procedure
This procedure is applicable for HNB-GW-initiated RANAP Reset procedure between HNB, HNB-GW, and
SGSN/MSC in core network.
The HNB-GW initiates RESET towards CN node in following scenarios:
OL-25069-03
Cisco ASR 5000 Series 3G Home NodeB Gateway Administration Guide ▄
How HNB-GW Works ▀
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