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laforge has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-hnbgw/+/32041 )

Change subject: [RFC] drop list of HNBAP UE Context ......................................................................

Patch Set 2:

(1 comment)

Patchset:

PS2: I think this could have implications when we start to support things like SABP (Service Area Broadcast Protocol).

In 2G, the BSC not only sends a warning message as broadcast to all BTSs who broadcast it on the downlink CBCH - but the BSC also needs to send a copy of the message via every currently active dedicated channel (as the UE doesn't listen to CCCH/CBCH while it is on a dedicated channel).

I'm not 100% familiar with the 3G service area broadcast, but I would imagine a similar procedure being required here. In this case the HNBGW would need to iterate over all active Iu connections and send a message through each of them.