Change in libosmocore[master]: gsup: add OSMO_GSUP_RAT_TYPES_IE

[Neels Hofmeyr]

Neels Hofmeyr has posted comments on this change. ( https://gerrit.osmocom.org/12452 )

Change subject: gsup: add OSMO_GSUP_RAT_TYPES_IE
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Patch Set 1:

I notice now, in InsertSubscriberDataArg:

AccessRestrictionData ::= BIT STRING {
utranNotAllowed (0),
geranNotAllowed (1),

i.e. the HLR tells the VLR whether access is allowed or not, hence this should indeed be implemented differently than this patch suggests.

This patch aimed at telling the HLR the RAT type during a LU; it worked well, but protocol wise I see it now as little more than a hack.

It would be nice, though, to still notify the HLR of the RAT type, to indicate, next to the last_lu_seen date we already have, also the RAT type of the last LU.


Before, I mentioned 'Cell Id or SAI', but relevant for the UpdateLocationArg is the PagingArea...

PagingArea ::= SEQUENCE SIZE (1..5) OF LocationArea
LocationArea ::= CHOICE {
laiFixedLength (= PLMN + LAC)

Unfortunately, it seems UpdateLocationArg does not include the ability to transfer a CI (full CGI would be PLMN + LAC + CI).

We could decide to indicate these things in GSUP as an Osmocom-specific feature, and any MAP compatibility layer could just drop that extra information.


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Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I93850710ab55a605bf61b95063a69682a2899bb1
Gerrit-Change-Number: 12452
Gerrit-PatchSet: 1
Gerrit-Owner: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder (1000002)
Gerrit-Reviewer: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Gerrit-Comment-Date: Thu, 03 Jan 2019 04:14:23 +0000
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