Make sure an unreserved FN is picked and reserved when allocating and
scheduling an SBA.
In practice this has no change in behavior right now, since anyway using
an offset of 52 FNs ensure no USF or POLL has alredy been scheduled that
far in the future. Since it's also impossible to allocate more than 1
SBA per PDCH and RTS FN, we are also safe about multiple SBAs being
allocated, because we use a hardcoded offset of 52.
However, that could change in the future, when we dynamically tweak the
current offset of 52 FN based on information from BTS about its AGCH
queue load:
* If load is high, we may need to increase the offset since it
will take more time for the BTS to transmit the TBF and hence we must
reserve a TBF starting time further in the future (higher FN).
* If load turns low, we may schedule next SBA a bit more nearby in time
than the previously allocated SBA, hence here there could be a
collision.
Related: OS#5020
Change-Id: I2d4e21e2307de6c17748e8da5c7e149c947a7eb9
This way PCU can now detect whether scheduled UL blocks through USF
were never received. This allows in a follow-up patch to start
increasing N3101 properly.
Related: OS#5033
Change-Id: Ia99c9edad6e5bd837e9baeb4fb2683b227887957
When the scheduler detects it's time to receive a UL block due to a
scheduled poll, if that polling is done on a UL TBF, then use its USF if
available instead of using USF_UNUSED (=7) when sending a DL block on
that same FN.
This is not really needed for correct work, since MS take care
themselves of scheduling a UL block when they receive the poll (RRBP)
some time before, and don't check the USF at the time of transmitting.
In any case, it helps understand better when looking at pcap traces that
indeed it a UL block from that MS was requested, instead of setting USF
to 7.
Related: OS#5033
Change-Id: I2ad9d8ea6afc8f83192033470bd27010a7474430
Simply use the UL TBF pointer all along until the end, instead of setting
both the UL TBF pointer plus the usf var.
This commit is also a preparation for next commit which also selects UL
TBF when a poll is available, to set its USF in the DL message instead
of "USF_UNUSED".
Change-Id: I3aa3886932ef87db18ed7ff6991ea315f481990b
With previous code, a skipped TBF could be returned despite not matching
the conditions, since at the end of the loop the tbf pointer was
returned.
Related: OS#5020
Change-Id: If6dccec86c7a655bf1c62f333cfbc8d2c507c94f
pdch_ul_controller.c: In function ‘pdch_ulc_release_tbf’:
pdch_ul_controller.c:217:7: error: ‘item_tbf’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
217 | if (item_tbf != tbf)
| ^
Change-Id: I42120fdf23753945ebc16bb5469d9fd253c3da37
There's no need for setting the FN in RA.ind since we anyway already
receive a DATA.ind beforehand.
Furthermore, the applied delay of 5 in the call is not really used at
all.
Change-Id: I437f4f95d054aea96bec3b9343e495451020ff3c
Issue will be fixed in next commit. Leaving ASSERTs disabled so that
test passes in jenkins.
Related: OS#5020
Change-Id: I657db6b300363f8f3a9e4cfaf7a7f49e361a0512
Take the time to also do small refactorings to clarify and simplify the
function, by using rts_next_fn() already available in pcu_utils.h and
getting rid of poll_tbf from tbf_candidates, which clearly follows
another objective.
Using PDCH UL Controller has the advantage that we don't need to check
poll_scheduled() on each TBF, but only do the query once.
Related: OS#5020
Change-Id: Ia60bb5249a9837dec1f42180e44d9848334d86d6
TbfTest is updated to submit empty blocks to have somehow meaningful
output (at least as meaningful test results as before, not much). That's
because we must update bts->curr_fn to have polls expire.
Related: OS#5020
Change-Id: I683ca738ce5a133c49c36a1d94439a942d64a831
Right now we handle different types of UL allocations in different
classes like PollAllocator and SBAllocator, and they usually don't take
into account the other one in most cases. Furthermore, those objects are
usually per-BTS object, instead of per PDCH object.
This is a first step towards having a unified per-PDCH controller which
takes care of controlling what is scheduled and hence expected on the
uplink. Each PDCH has a UL Controller which keeps track of all reserved
uplink frame, be it SB, RRBP poll or USF assigned, all under the same
API.
As a first step, only the SBA part is fully implemented and used (being
it the easiest part to replace); TBF poll+usf will come in follow-up
patches later on. As a result, the SBAllocator per-BTS class dissappears
but some of its code is refactored/reused to provide more features to the
gprs_rlcmac_sba object, which is also further integrated into the new UL
Controller.
Related: OS#5020
Change-Id: I84b24beea4a1aa2c1528f41435f77bd16df2b947
Since recently (see Depends below), BTS side submits DATA.ind with len=0
to announce nothing was received on that UL block FN. This will allow
osmo-pcu track time more accurately, and use this information to quickly
find out if a UL block was expected as requested by RRBP or USF poll and
increment counters such as N3101 (finally being able to properly
implement timers such as T3619).
Depends: osmo-bts.git Change-Id I343c7a721dab72411edbca816c8864926bc329fb
Related: OS#5020
Change-Id: Ibc495173119465e74f726ddc36e312334e6dc0fd
Since recently (see Depends below), BTS side submits DATA.ind with len=0
to announce nothing was received on that UL block FN. This will allow
osmo-pcu track time more accurately, and use this information to quickly
find out if a UL block was expected as requested by RRBP or USF poll and
increment counters such as N3101 (finally being able to properly
implement timers such as T3619).
This patch does the same for direct phy feature, where the osmo-pcu
process receives the DATA.ind directly from the DSP.
Depends: osmo-bts.git Change-Id I343c7a721dab72411edbca816c8864926bc329fb
Related: OS#5033
Change-Id: I9a835e16ef0e5a68c003a93d1a33233aa43464ae
Since recently (see Depends below), BTS side submits DATA.ind with len=0
to announce nothing was received on that UL block FN. This will allow
osmo-pcu track time more accurately, and use this information to quickly
find out if a UL block was expected as requested by RRBP or USF poll and
increment counters such as N3101 (finally being able to properly
implement timers such as T3619).
Depends: osmo-bts.git Change-Id I343c7a721dab72411edbca816c8864926bc329fb
Related: OS#5020
Change-Id: I17c28abf63b153448b533971ac5cf2e48daadea8
Recent commit started using ->is_sgsn field which is only available as
of current libosmocore master (> 1.5.1)
Fixes: 423bf8c408
Change-Id: I3d579bd253363efc3cf183a922d6affca1a499e0
Use primitives instead of parsing the message a second time.
Set bctx->is_sgsn to false to allow the BSSGP layer to send back a
RESET_ACK with cell information.
Related: OS#3879
Depends: Ibcbaffa94cbdc4296a8a7c372304ac11d50d9559 (libosmocore)
Change-Id: I3afaf826798e362270ffa622c24bfd124ef25cd1
If Idle TBF timer (X2031) is set to 0, it means the TBF release is
immediately started once all queued data has been scheduled. In that
case, we must set FBI=1 (by setting cv=0) and move to FINISH state.
This used to work over the usual path where X2031 != 0, because release
start will alays happen at a later sched poll time where a dummy LLC
frame is sent and FBI set accordingly.
Change-Id: Ib20602936ae084c413f6bfe14eea33b602020be0
Old commit getting rid of LLC UI dummy and updating create_new_bsn()
function introduced a bug by not moving update of value m_last_dl_drained_fn
prior to a new break introduced.
As a result, the value is not updated in the case LLC queue becomes
drained but last few bytes are drained at exactly that moment.
Furthermore, then the IDLE tbf timer (X2031, keep_open())) returns always
true since according to it the drain never happened.
The impact of the bug is basically delaying a bit more than expected the
time the TBF stays in IDLE state with the TBF release process yet
to be started.
Related: OS#4849
Fixes: 7d0f9a0ec3
Change-Id: I7420aeffda3500bcdc990291e4a56511af433ff9
This is specially useful to detect for instance if a cell is handling
too many users, ending up in TFI or USF exhaustions. This information
can be later in the future used to tune TBF allocation algorithm behavior
(either manually/statially through config file, or
automatically/dynamically in code based on some thresholds).
Related: OS#5042
Change-Id: I5402e937ff8d800684655e500ef8e5c867141dc3
Since a while ago, the data architecture was changed so that TBF is
guaranteed to always have a MS object associated. Hence, it makes no
sense to pass the MS object as a separate param as we can take it from
tbf object and makes code less confusing.
Change-Id: Idc0c76cf6f007afa4236480cdad0d8e99dabec5f
Pau Espin
Alexander Couzens
Harald Welte