Cisco Cisco Packet Data Interworking Function (PDIF)
HNB Gateway in Wireless Network
▀ How HNB-GW Works
▄ HNB-GW Administration Guide, StarOS Release 18
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Elementary Procedure
Message
Error Indication
ERROR INDICATION
Handling of Class 1 EPs
:
In case of Class 1 EPs, HNB-GW receives SABP messages from CBC, extracts Service Area
List from SABP message and sends this message to corresponding HNBs in provided service
areas.
areas.
While sending the SABP messages to HNB, HNB-GW modifies service area list and includes
only that service area to which HNB belongs.
HNB-GW receives successful/failure responses from HNBs within service areas and sends
collective response for these service areas to CBC.
Important:
HNB-GW supports maximum of 1000 service areas (SAs) per
SABP message. If more than 1000 SAs need to be sent, then HNB-GW sends
multiple SABP messages in chunks of 1000 SAs per SABP message.
multiple SABP messages in chunks of 1000 SAs per SABP message.
Handling of Class 2 EPs
In case of Class 2 EPs, HNB-GW receives SABP messages from HNB and sends it to CBC.
HNB initiates the RESTART and FAILURE procedures and HNB-GW transparently passes it
to the CBC.
ERROR INDICATION is initiated by both HNB-GW and HNB.
Call Flows: Handling Class 2 Elementary Procedures
ERROR Indication
Following figure and text points describe the ERROR Indication procedure: