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144 Commits (11ac8c25294c75fb0a0a9a9f93072fa117117fba)

Author SHA1 Message Date
Andre Puschmann 813adb9567 rlc_um_nr: reduce verbosity in info mode 
this will only print the most relevant messages in info mode.
also streamlines some messages with RLC AM entity.
 3 years ago
Andre Puschmann 1bec07a64a rlc_um_nr: fix starting/stopping of reassemble timer 3 years ago
Andre Puschmann 4187be3ff9 Revert "Revert "rlc_um_nr: reimplement update of RX_Next_Reassembly"" 
This reverts commit 296758e4ab.
 3 years ago
Pedro Alvarez f99d6bc224 lib,rlc: changed get_bearer() to get_lcid(). 3 years ago
Pedro Alvarez 123ac16653 rlc_am_nr: fixed issue with pointers from rx entity to tx entity 3 years ago
Pedro Alvarez f99e841421 Changed using a rlc_am_lte and rlc_am_nr entity, to a single rlc_am entity. 3 years ago
Pedro Alvarez eefedcfccd rlc_am_nr: renamed rlc_am_base to just rlc_am 3 years ago
Pedro Alvarez aef87d5366 rlc_am_nr: Change rlc_am_base to use unique_ptr to hold rx/tx entities 3 years ago
Pedro Alvarez 779eda98bd Temporarly silence unused variable warnings. 3 years ago
Pedro Alvarez e780eb5ab0 Fixed missing TM and RLC AM NR in mem_pool 3 years ago
Pedro Alvarez debb4a0c6b Refactored RLC AM segment pool for re-use in both LTE and NR 
Moved RLC AMD PDU definitions from rlc_am_lte.h to rlc_common.h to make them re-usable in both RLC LTE and RLC NR
 3 years ago
Pedro Alvarez 54be15e7a6 Moved write pdu to rlc_am_base::rlc_am_base_rx 3 years ago
Pedro Alvarez 476f9e1156 Changed logger initialization in RLC AM entities 3 years ago
Pedro Alvarez 022c51493b Refactored RLC AM NR/LTE Rx and Tx entities to use a rlc_am_base_rx/tx class. 
This was done to make it easier to share entity specific code between LTE and NR.
This removes the previously used templates.
 3 years ago
Pedro Alvarez b15f63f32f Added an RLC AM base class to avoid code duplication in the RLC AM NR entity. 
This class is based on a template that receives as argument the
rlc_am_*_tx/rx entities, so that those are different for LTE and NR.

Moved code from rlc_am_lte/nr entities so that they use the new base class.
 3 years ago
Andre Puschmann 951fea5f61 bearer_manager,rlc: reduce log level of message to warning level 
relevant for the UE when it receives 2nd reconfiguration it could
be that the bearers are added again. in this case the handling is fine
and everything will work as expected. No reason to log error.
 3 years ago
Pedro Alvarez d528d8af4c Added initial skeleton for RLC AM NR entity 3 years ago
Pedro Alvarez 2bb249bf09 Moved RLC AM LTE and NR packing functions to their own file. 3 years ago
Pedro Alvarez f93d428e49 Moved RLC AM data structures to their own file 3 years ago
Carlo Galiotto ba50bbfb76 rlc,rrc,nr: remove rb_type from rlc_um_config 
Signed-off-by: Carlo Galiotto <carlo@srs.io>
 3 years ago
Carlo Galiotto 9c2099f680 rrc,rlc,nr: fix RB label in RLC-NR for UE logs + .. 
add rb_type in rlc_um_config

Signed-off-by: Carlo Galiotto <carlo@srs.io>
 3 years ago
Carlo Galiotto d95c31d2de rlc,rrc,nr: fix rlc bearer string diplayed in logs 
Signed-off-by: Carlo Galiotto <carlo@srs.io>
 3 years ago
Andre Puschmann 296758e4ab Revert "rlc_um_nr: reimplement update of RX_Next_Reassembly" 
This reverts commit 5b025cfbf8.
 3 years ago
Andre Puschmann 6d0aafcf69 rlc_um_nr: fix has_missing_byte_segment() routine 
return true if rx_window contains segment of this SN
 3 years ago
Andre Puschmann 5b025cfbf8 rlc_um_nr: reimplement update of RX_Next_Reassembly 3 years ago
Andre Puschmann 2366dc286d rlc_um_nr: improve logging 3 years ago
Francisco 529e2bdf55 nr,rlc: call bsr update callback in RLC UM NR 3 years ago
Francisco 7ad1ad800e lte,enb,rlc: atomically compute DL buffer state and update the scheduler in the eNB 3 years ago
Andre Puschmann e2d26b5a8c rlc_um_nr: log PDU without SN if full SDU is transmitted 
PDUs that contain full SDUs don't have SNs, so the log should be
without it
 3 years ago
Ismael Gomez 80c48a8b01 rlc: protect access to tx_enabled 3 years ago
Francisco d60950d0f3 lte,enb,rlc: change new_tx and prio_tx variable names to snake_case and ensure they are zero initialized 3 years ago
Francisco 7aa5f731ce lte,enb,rlc: push to scheduler pending prioritized bytes both in case of RLC timer expiry or in case of new buffer state detection 3 years ago
Francisco 4a58c10f30 lte,enb,rlc: compute and forward to scheduler the number of bytes pending for retx and status pdu in RLC AM bearer 3 years ago
faluco fa351cd285 Rename functions that contain the unsafe word to nolock. 
The term "unsafe" does not clearly state that the function is not locking the shared date and it sounds "dangerous", so use a more explicit term.
 3 years ago
Andre Puschmann 59e1bca3f5 rlc_am_lte: fix potential crash when attempting to resize tx queue 
under some circumstances it could happen that the RLC is configured
when SDUs are already being written to the queue. The resize
operation of the underlying container would fail in this case.

Make sure to empty the queue before doing the resize.
 3 years ago
faluco 7b079fe289 Fix a data race in rlc TM metrics. 3 years ago
faluco edb7342aef Fix data race in rlc UM metrics. 3 years ago
faluco d009160ba6 Fix data race in the metrics of the rlc. 3 years ago
Andre Puschmann 7726acad41 rlc_am_lte: fix counting of retx of entire PDUs and PDU segments 
this patch fixes a bug discovered in a real network where the DL CQI of a
user degraded repidly in very short time. A relativly big RLC PDU that
was still sent with the good CQI in a big grant now needs to be split
across many tiny segments because the CQI degraded so much.

The retx couting for each transmitted segment caused the retx counter to
reach maxRetx quickly.

With this patch we do not increment the retx counter for each transmitted
PDU or segment of a PDU but instead only increment the counter when
a given SN is added to the retx queue. This can happen either:
a) if the SN is negativly acknowledged and was not already on the retx queue,
b) no new data is available for tx and a SN is selected for retx.

This is in accordance with TS 36.322 which handles retx counting in section
5.2.1 according to the above description.
 3 years ago
Andre Puschmann 4379c20eb9 rlc_am_lte: avoid locking of Rx mutex twice when generating status PDU 
call reset_status(), which now is an private method directly when
building a status PDU. No need for the Tx side to call Rx again.
 3 years ago
Andre Puschmann 53a7dc78ee rlc_am_lte: replace do_status boolean with atomic 
the do_status is queried from the Tx code frequently. To reduce
chances to delay the execution because the RLC Rx side is currently
holding the mutex we can use an atomic.
 3 years ago
Andre Puschmann f292042f66 rlc_am_lte: use try-lock when building status PDU 
the patch uses try-lock whenever a status PDU is tried
to be built. This makes sure that when the lock is currently
hold (e.g. by a thread processing rx PDUs) the generation
of the status PDUs is not taking too long and blocking the calling
thread. Instead the status PDU generation is deferred to the next
Tx opportunity.

It's a probabilistic approach that assumes that at some stage the
lock can in fact be acquired.
 3 years ago
Andre Puschmann a9d21696c5 rlc_am_lte: make number of RLC SDUs per PDU a compile-time parameter 
this allows to set the maximum number of RLC SDUs included
in a single PDU at compile time.
 3 years ago
Pedro Alvarez 171d5727be Moved lib RLC into it's own folder 3 years ago