osmo-msc[master]: fix paging: add timeout to discard unsuccessful paging

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Harald Welte gerrit-no-reply at lists.osmocom.org
Tue Dec 19 08:23:22 UTC 2017


Patch Set 3:

> > > are we sure there's no GSM timer number/name for this?
 > >
 > > not sure. I can try to have a look...
 > 
 > So far all "Paging" chapters I have found talk merely of initiating
 > a Paging; closest match would be the 48.008 "3.1.10 Paging", which
 > doesn't mention any timeouts. 

I think the general assumption is that the MSC once sends a PAGING command
to the BSC[s] and doesn't do any re-transmissions but rather relies on the
BSC to take care of that.

The question is how long the BSC will wait for any response from the BSC. I'll have a look.

 > The T3113 timer is mentioned for the
 > RR layer in 44.018 "3.3.2.1 Paging initiation by the network", but
 > I'm looking at the MSC, i.e. BSSMAP and IuCS. I feel like I'm
 > searching the needle in the hay stack.

Sorry for that.

 > On another note, I personally find "paging timeout" much easier to
 > understand than "T1234"...

The "problem" is that the existing literature on network configuration/optimziation will always refer to the timer numbers. Us inventing our own names is fine, as long
was we also use the official number somewhere so people can find it easily.

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Gerrit-MessageType: comment
Gerrit-Change-Id: I2db6f1e2ad341cf9c2cc7a21ec2fca0bae5b2db5
Gerrit-PatchSet: 3
Gerrit-Project: osmo-msc
Gerrit-Branch: master
Gerrit-Owner: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Gerrit-HasComments: No



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