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516 Commits (e26d873249a78079d9e1ee7bac0e2731a40eb6ab)

Author SHA1 Message Date
Ismael Gomez 7839ab09dc Add RLF-Reportv9 to srsUE 3 years ago
David Rupprecht 3217c00cfc Adjusting NAS base security function to 5G 3 years ago
Andre Puschmann 28668aac34 ue,proc_ra_nr: add temporary flag to skip RAR reception 
this will be removed again as soon as the eNB supports full RAR
transmission.
 3 years ago
Andre Puschmann 99dc94ab38 nas: make state variables atomics 
NAS states and substates maybe be requested from other threads so
they need to be protected.

Note that the caller still needs to hold it's own mutex if different
actions are required based on the state.
 3 years ago
David Rupprecht 04ef6e120d Added new SIM functions to get MCC, MNC and MSIN 3 years ago
Andre Puschmann 9c298b203d srsue: reduce the default RRC release to 8 (minimum value) 3 years ago
David Rupprecht 2563a78f34 Added basic 5G NAS metrics 3 years ago
David Rupprecht 9172059078 Supply ctor with logger instead of fetching 3 years ago
David Rupprecht 0217bf5332 Fixed name space for rrc ue 3 years ago
David Rupprecht fb92118bb7 Add 5G NAS infrastructure 4 years ago
David Rupprecht 505225d845 Added ue nas base class with security functions 4 years ago
David Rupprecht 7fa85ab336 Added nas test common file 4 years ago
Andre Puschmann e0d9afc342 proc_ra: fix race detected with TSAN 
rar_received is accessed from PHY worker and Stack thread
 4 years ago
Ismael Gomez 4e39982a19
Fix TSAN warnings in UE (#3021) 
* Protect PHY SR signal management in a class

* Protect intra_freq_meas vector

* Protect cell and srate shared variables in thread-safe classes

* srsue,srsenb: include TSAN options header

* Protect ue_rnti_t and rnti scheduling windows behind thread-safe classes

* Protect access to state variable in sync_state

* Protect access to metrics configuration

* Protect access to is_pending_sr

* Protect access to UE prach worker

* Protect UE mux

* Avoid unlocking mutex twice

* Fix data races in RF/ZMQ

* Fix data races in intra_measure and PHY

* Fix minor data races in MAC

* Make TSAN default behaviour to not halt on error

* Fix blocking in intra cell measurement

* Address comments

Co-authored-by: Andre Puschmann <andre@softwareradiosystems.com>
 4 years ago
Pedro Alvarez 171d5727be Moved lib RLC into it's own folder 4 years ago
Andre Puschmann 0a16f48869 gw: fix race condition 
GW thread was checking the default_eps_bearer variable without
protection. RRC could update it when deleting DRB or receiving RRC
connection release.
 4 years ago
Andre Puschmann 368c7b9e4f ue,stack: clear all EPS bearers when going RRC idle 
the EPS bearer manager was only informed when a single DRB
was removed but not when entering idle which requires to
remove all bearers.

This cause the service request to fail.
 4 years ago
Andre Puschmann 5313fb99d6 tft: add helper to delete all TFTs for EPS bearer 
when a EPS bearer is removed, all associated TFTs need
to be removed as well.
 4 years ago
Andre Puschmann 483a216bd5 ue,stack: refactor handling of radio bearears in UE stack 
this is a rather large commit that is hard to split because
it touches quite a few components.

It's a preparation patch for adding NR split bearers in the next
step.

We realized that managing RLC and PDCP bearers for both NR and LTE
in the same entity doesn't work. This is because we use the LCID
as a key for all accesses. With NR dual connectivity however we
can have the same LCID active at the same time for both LTE and NR
carriers.

The patch solves that by creating a dedicated NR instance for RLC/PDCP
in the stack. But then the question arises for UL traffic on, e.g. LCID 4
what PDCP instance the GW should use for pushing SDUs. It doesnt' know
that. And in fact it doesn't need to. It just needs to know EPS
bearer IDs. So the next change was to remove the knowledge of what
LCIDs are from the GW. Make is agnostic and only work on EPS bearer IDs.

The handling and mapping between EPS bearer IDs and LCIDs for LTE
or NR (mainly PDCP for pushing data) is done in the Stack because
it has access to both.

The NAS also has a EPS bearer map but only knows about default and
dedicated bearers. It doesn't know on which logical channels they
are transmitted.
 4 years ago
Andre Puschmann 3f9c069ff7 ue_stack_lte: add RLC and PDCP entities for NR 4 years ago
David Rupprecht d1d8500ce5 Add testcase for reconfiguration 4 years ago
Andre Puschmann e2c496d825 srsue,mac: fix race between PHY and MAC when stopping UE 
the issue let to unwanted log warning at the end of the UE
execution when the PHY was still pushing DL PDUs while MAC
was already stopped.

This fixes #3003
 4 years ago
Ismael Gomez e35a0d72fa Revert UE changes 4 years ago
Ismael Gomez dd9889e07c Add carrier index to uplink PCAP captures 4 years ago
Pedro Alvarez 299d2ee35d Added interface to make the PDCP notify the RRC of integrity check 
failures.
 4 years ago
Andre Puschmann aaffdeb326 rrc,rlc: add method to signal protocol failure to RRC 
general-purpose method for lower layers to signal protocol
failures to higher layers, i.e. RRC.

In the current case, implement a direct release of the UE (enb) or
a reestablishment (UE).
 4 years ago
Francisco 486823e5de sched,bugfix: The PHR handling scheme now considers the number of PRBs of the UL grant that carried the PHR. Before, it was assuming the most conservative scenario of Nprb=1 4 years ago
Andre Puschmann 018c734b09 dl_harq: fix unlocking of unlocked mutex bug detected by TSAN 
in the mac_test the tb_decoded() method was called twice for
the 2nd codeword, causig TSAN to complain about an unlocked mutex
being unlocked.

The patch resolves the potential issue only calling tb_decoded
for a grant/tb thas has a non-zero MCS.

The patch also adjusts the reset function to have a safe and "unsafe"
version to be called from inside the class, similar to other
classes where we do the same.
 4 years ago
Andre Puschmann b40867ffec ue,rrc: add simple connection setup procedure 
this is an attempt to fix #2850 by defering the transmission of
the connection setup complete until the PHY has applied
the dedicated config in the connection setup.
 4 years ago
David Rupprecht 8c194b887b Allow NAS init function to fail 4 years ago
David Rupprecht 617fb2ba7e Added default destructor for args 4 years ago
David Rupprecht 102a943171 Fixed naming srsLTE to srsRAN 4 years ago
David Rupprecht fd451e8be3 Configure Short PDCP NR SN support 4 years ago
Andre Puschmann e3b77fd82a rrc_nr: set timeout for NR cell measurement to 250ms 
the low timout of 10ms was:
1) causing too frequent measurement reports
2) causes a MO ping test to fail where the ICMP request
was sent on the LTE carrier but never got a reply because
the MCG addition was inbetween
 4 years ago
David Rupprecht d2aa25d451 Added option for simulated measurement 4 years ago
Xavier Arteaga 715f8900a8 Selected NR RA procedure PRACH send timeout according to system frame number period from PRACH PHY tables 4 years ago
Andre Puschmann 4b3538aaa8 {dl,ul}_harq: fix metrics calculation 
rewrite  metrics calculation for NR HARQ and remove
unneeded operations.
 4 years ago
Andre Puschmann b6f2c80f66 mac_common: add helper method to get total buffer state 4 years ago
David Rupprecht a064e85c54 rename common lte header 4 years ago
David Rupprecht 81ad72b0ff Refactor srb and drb handling 4 years ago
David Rupprecht 91ff8a2e6d Add rrc_nr to rlc init function 4 years ago
Andre Puschmann c8d3e133dc ue: bump default RRC release announced to 15 4 years ago
David Rupprecht 75cd5e65e5 Removed arfcn and freq, and nof_prbs from config file 4 years ago
David Rupprecht bfe2ad98ef Added parsing for NR DL HARQ cfg 4 years ago
Andre Puschmann b9ae064338 mac_nr: add DL HARQ 
this commit adds a complete DL HARQ entity to the MAC of the UE.
It also refactors demux into an own class and adapts the PHY-MAC
interface to use the new MAC capabilities.
 4 years ago
David Rupprecht fe8727050b Added new rrc_nr to phy flattening functions and fixes 4 years ago
David Rupprecht 4c68c17bd3 Fixed log level of nr loggers to lte level and hex size 4 years ago
Andre Puschmann 44baea6666 mac_nr: add UL HARQ 
this patch adds a basic UL HARQ entity for NR.

The patch also updates some interfaces between MAC/RA/HARQ,
i.e. get_temp_crnti().

It also adds a Msg3 unit test.
 4 years ago
David Rupprecht eeddbe69ce Fixes repeating proc RA due to SR trigger 4 years ago
David Rupprecht 5a3a2a6d6f Added functions for adding phr and tag config 4 years ago
Francisco f7a8b8bf94 separate drb srb ids into separate enum types 4 years ago
Francisco 21718af3b6 avoid allocating std::string to get lcid radio bearer name. Refactored the lte radio bearer enum type 4 years ago
Andre Puschmann cf696138d3 mac_nr: fix packing order of SDU and CEs 
SDUs need to go first in the MAC PDU, followed by CEs
 4 years ago
Andre Puschmann 7f415189f3 ue,mac: enable basic MAC metrics 
this adds basic MAC metrics calculation for the DL NR MAC
 4 years ago
Andre Puschmann db496df1e6 mac_nr: add support for periodic BSR reporting 
building on the previous refactor this patch now adds support
for peridoic BSR reporting (using short BSR). It furthermore does
the following changes:

* add BSR packing
* add proc_bsr_nr unit test
* move mac_nr test code into test folder under src (needs to be done with other test code too)
 4 years ago
David Rupprecht 56e947bf27 Added functionality for releasing a NR bearer 4 years ago
David Rupprecht cc6d8128ad Added gw interface if it is running 4 years ago
David Rupprecht 7a481c40ab Added mac prach nr proc error handling 4 years ago
David Rupprecht f9ea02b6bf Added functions for rrc reestablishing procedure if nr reconfig failes 4 years ago
Xavier Arteaga 01990c2e1d SRSUE: Add PHY-MAC SR related interfaces 4 years ago
David Rupprecht 506adca930 Set eutra nr band info based config value 4 years ago
Andre Puschmann d135ae4d29 proc_bsr: initial BSR procedure for NR 
* refactor some common methods to mac_common.cc
* add common mux_base class
* move UL PDU generation to mux class
* add logical channel registration to MAC, MUX, BSR
* add initial proc BSR
* add basic MAC NR test
* rework MAC interfaces
 4 years ago
Francisco d04a19f8bc refactor - increase code reuse in adt files 4 years ago
Andre Puschmann bde7b49ca3 ue,mac_nr: add basic SR procedure 
the current implementation support only one SR config
and doesn't support the prohibit timer
 4 years ago
David Rupprecht 8c86d2084d Adding NR phy config RRC parsing 
Added error handling

Reworked flattening error handling
 4 years ago
Andre Puschmann 1a0891df51 all: check return value of make_byte_buffer() and handle them safely 4 years ago
Codebot 4523ee6087 rename srsLTE to srsRAN 4 years ago
Xavier Arteaga 2782d96170 SRSUE: compute speed from TA commands 4 years ago
Francisco 3e9f93eb8a refactor - remove old log_filter and logmap libraries from the codebase 4 years ago
David Rupprecht bb3e87302d Added new pcap enable option and mac nr 4 years ago
Xavier Arteaga 1e55d68b55 Removed set RNTI from API 4 years ago
Francisco b329e25bbb move ue phy interfaces to separate interfaces header file 4 years ago
Francisco 13d805ef56 move ue rrc interfaces to separate interfaces header file 4 years ago
Francisco b1706b9197 move ue nas interfaces to separate interfaces header file 4 years ago
Francisco b8bd869d0f move ue rlc interfaces to separate interfaces header file 4 years ago
Francisco a988351f46 move ue pdcp interfaces to separate interfaces header file 4 years ago
Francisco ea04104e8e move ue gw interfaces to separate interfaces header file 4 years ago
Francisco 186285ffd3 move ue usim interfaces to separate interfaces header file 4 years ago
faluco eaf20fa4f3 - Removed some logger injections in the ue app. 
- Removed old logger setup code not needed anymore.
 4 years ago
faluco 3ce7454105 - Remove old loggers from ue_stack_lte, ue gw. 
- Remove old loggers setting up for these classes.
 4 years ago
Andre Puschmann 9c4146442a mac,phy: refactor NR MAC/PHY UL data passing interface 
inspired by accepted (but not yet merged) PR to include the
(unique_)byte_buffer_t for MAC/PHY interfacing, this patch adds
a few more useful bits to that. Buffer management for UL data is now
done in MAC and only a pointer to the data is passed in the UL action.

* Move Tx softbuffer to MAC (until UL HARQ class is ready)
* Remove temparal data member in cc_worker
* Remove memcpy after packing MAC PDU
 4 years ago
David Rupprecht f6f6ee406b SRSUE NR: use correct rnti in rar and make NR proc ra 4 years ago
David Rupprecht 1fcd006a7c fixed segfaulting 4 years ago
David Rupprecht 82a8dcc77a Change interface to unique_byte_buffer 
logging message for msg3 preparing
 4 years ago
David Rupprecht 3af0342418 Added mux class and packing of msg3 4 years ago
Xavier Arteaga 760ad3a746 SRSUE: Interface stack and PHY for NR-RA procedure 4 years ago
David Rupprecht 0f1586dd2d Deleted all HAVE_5GNR in CC and h files 
CMakeList and travis yaml
 4 years ago
David Rupprecht 1987ddd923 Added phy_nr to ue_stack_lte 4 years ago
David Rupprecht 24123313bf Added MAC NR RA procedure with a minimal test case 4 years ago
Andre Puschmann 6eed6f622f mac_nr: update RA related function in MAC/PHY interface 
* expose interface to trigger PRACH from MAC
* indicate PRACH tx from PHY
* add temporary RAR PDU handling with Msg3 grant indication to PHY
 4 years ago
Francisco 3265d940ec remove byte buffer pool cached member variables as they are unnecessary now. 4 years ago
Francisco 0c7c317be5 refactor byte_buffer class and move it to separate file 4 years ago
Pedro Alvarez bb0e31feda Reduce log level of SDUs dropped in the stack to info. Added ul_dropped_sdus to stack metrics. 4 years ago
David Rupprecht 3dab82c42f Added interface that allows to update the lcid in case of a nr reconfiguration 
nr rrc updates gw lcid if reconf was received
 4 years ago
faluco 821925a273 - Upgrade to srslog the loggers in lib/mac. 
- Adapted users of these classes and tests.
 4 years ago
Andre Puschmann 8e13f04684 mac_pcap: refactor MAC PCAP and include NR RAT into same object 
after adding the thread-safe PCAP writer functionality to the EUTRA
MAC object it became clear that we don't wont to replicate the
same for the NR object.

This patch therefore refactors the class that now supports both EUTRA and
NR rats. The old mac_nr_pcap.[h/cc] has been deleted. All test-cases
and usages now use the new object that needs to pass the RAT type in
the ctor.

this patch addresses the last open point of #2160
 4 years ago
faluco d37a07a47f Replaced loggers in buffer_pool.h 4 years ago
Andre Puschmann ecf7eaec5c ue_stack_lte: expose MAC NR interface for NSA configs 4 years ago
Andre Puschmann f5c945dc2f mac_nr: add interface to set C-RNTI and contention ID from RRC 
used during contention-based/free RA
 4 years ago
Andre Puschmann 1aadc5c53e mac_nr: tiny cleanups of MAC class, use of new logger 4 years ago
Andre Puschmann 73cb0dabf2 mac_nr: move UE MAC class into own subfolder 
this should simplify further MAC NR extensions and lead
to a more organized folder structure
 4 years ago
Andre Puschmann da9e3363f1 mac_pdu_nr: rename MAC PDU class for NR to adhere naming conventions 
* mainly to have _nr as trailing name for filename and class
* also add "sch" to class and filename (RAR PDU will have extra class)
 4 years ago
faluco 5981469f9f
Upgrade loggers in srsue (#2163) 
* Replaced UE logger in the ue class.

* Replaced loggers in the main phy class and prach.

* Replaced loggers in phy common and ta_control.

* Replace loggers in cc and sf workers.

* Replaced loggers in intra_measure, scell_recv, search, sfn_sync, sync.

* Remove last uses of the old loggers in the main phy class.

* Remove stray newline in logs.

* Replaced loggers in ue gw.

* - Started to replace loggers in the ue stack.
- Replaced loggers in usim and pcsc.
- Adapted nas and usim tests.

* Replace loggers in nas.

* Added missing log init calls in two previously modified tests.

* Replaced logger in nas idle procs.

* Replaced loggers in nas emm state.

* Replaced loggers in tft packet filter and adapted tft test.

* Replaced loggers in main RRC class.

* Replaced loggers in RRC cell.

* Replaced loggers in RRC meas.

* Replaced loggers in rrc procedures.

* Started logger replacement in MAC layer, more precisely in demux and dl_harq classes.
Been unable to inject loggers in construction for dl_tb_process due to very weird static assertions in the std::vector code being the type not constructible which is not true, so instead use the main MAC logger directly.

* Replaced loggers in mac mux class.

* Replaced loggers in mac pro_bsr.

* Replaced loggers in mac proc phr.

* Replaced loggers in mac proc SR and RA.

* Replace loggers in mac UL HARQ.

* Replaced loggers in main ue stack class.

* Fixed nas test crashing due to a null string.

* Ported mac_test to use the new loggers.

* Removed TTI reporting for the PHY log as the old logger did.

* Replaced loggers in UE phy tests.

* Configure loggers in nas_test.

* Replaced loggers in rrc_meas_test.

* Replaced loggers in rrc_reconfig_test.

* Added missing newline in tft_test.

* Fix compilation errors in TTCN3 tests.

* Fix linker error detected in CI and warning.

* Replaced loggers in TTCN3 tests.

* Fix a text replace error in some log messages.

* Remove trailing newlines from log entries.

* Remove old logger from rrc.

* Flush backend before printing the test status.

* - Fix compilation error from previous rebase.
- Remove trailing newlines from some missing log entries.
 4 years ago
Andre Puschmann 4709bacefd srsue: add DL NR-ARFCN param 
* add PHY param to set DL NR-ARFCN
* use new band_helper class to convert ARFCNs to supported bands
* signal supported NR bands in UE capabilities
 4 years ago
David Rupprecht 9ccc36d4fa Make fake measurement frequency depend on measurement config 4 years ago
David Rupprecht 1b19ee40e7 Added usim features for key derivation 4 years ago
David Rupprecht ceda458bb3 Added MAC NR to EUTRA and NR with stack interfaces including MAC config build 
Moved MAC logical channel config to MAC interface types
 4 years ago
David Rupprecht e0420049e3 Build infrastucture for reconfig 4 years ago
David Rupprecht 64299960bd Added procedure for NR reconfiguration and RRC with NR complete 4 years ago
Andre Puschmann a09fb95c25 proc_ra: protect RA procedure from concurrent thread access 
that patch addreses issue #2199 by defering RA-related calls that
are executed from within PHY workers.

The time-critical bits of more complex functions such as tb_decoded()
are still executed in the PHY worker thread but the state machine
manipulation is defered.
 4 years ago
Ismael Gomez a6423442c2
Refactor NR RA files and fix header includes all over library (#2162) 
* Refactor NR resource allocation classes. Use DCI instead of grant for dummy PDSCH UE/eNB test

* Minor refactors in NR workers and ue_dl

* Fix include issues

* fix compilation issues
 4 years ago
David Rupprecht 1a10c783b5 Faking measurements 4 years ago
David Rupprecht f7d313147a Added infrastrukture for measurements 
Init rrc_nr as part of the LTE stack
 4 years ago
David Rupprecht 4305929ec7 Hardcoded NR/MRDC-Capabilities 4 years ago
David Rupprecht b79eef0860 Introducing nr_rrc <-> rrc interface for eutra and nr cap query 4 years ago
David Rupprecht 9eb0b72cb4 Added rrc function has_nr_dc 4 years ago
Andre Puschmann 37fc1c59e3 fix DRB release logging 
this caused wrong logs because the LCID was printed based on the assumption
that the DRB LCID is alwasy 2 + drb ID

Use drb_id as drb_cfg key
 4 years ago
Andre Puschmann c8801578df gw: use std::chrono for metrics and fix nan display 
* replace gettimeofday with std::chrono
* fix nan printing when nof_tti is zero (at startup)
 4 years ago
David Rupprecht 81609d48dd Added measurment report for interrat nr15 
Added function for removing interrat triggers
 4 years ago
David Rupprecht 5df2fb1fa1 Added rrc has nr neighbour cells 4 years ago
David Rupprecht 0e4d77da76 Refactor eutra reporting code and add report triggers for inter rat measurements 4 years ago
David Rupprecht e4e67eebce Added infrastucture to process measurments and evaluate interrat triggers 4 years ago
David Rupprecht 25e5b88704 Added NR range_to_value function and debug logging for measurements 4 years ago
David Rupprecht ce4526a935 Extended measurements interrat nr r15 testcase with measurements 4 years ago
David Rupprecht 826dd32c89 Rename meas_cell to meas_cell_eutra 
Added meas_cell_nr class

Make meas_cell list as template class

Inheritance rrc_cell to meas_cell_nr
Added process_new_cell_meas_nr function
 4 years ago
David Rupprecht 62b558fccf Move rat type to common header 
Removed phy measurement from rrc interface phy

Updated rrc interface for handling measurements
 4 years ago
David Rupprecht 848496bb0f Moved get_earfcn to srslte get_carrier_freq func 4 years ago
David Rupprecht d4fb2dfb16 Added handling of inter rat measurement config function 
Make report config more agonistic
 4 years ago
David Rupprecht f4b0042c10 Added minimal interrat and nr measurement testcase 
Added the handling of nr_r15 meas config
Added seperate handling of reportConfig for eutra
 4 years ago
Andre Puschmann ab598dae3b gw: calculate GW throughput based on TTI timing 
similiar like the RLC patch, MAC TTIs are passed to GW so the
rx/tx rate can be calculated based on the LTE timing
 4 years ago
Andre Puschmann 07d2bc4fe8 change license header to agnostic version with hint to root LICENSE file 4 years ago
Xavier Arteaga f64c268a69 SRSUE: Refactored MAC/RRC SCell Activation/Deactivation 4 years ago
Pedro Alvarez 454162cea7 Deleted nas_interface_stack. 4 years ago
Pedro Alvarez 604e79214d Changed NAS is_attached interface to is_registered. 4 years ago
Pedro Alvarez 5649ecaab0 Renamed nas_common.h to nas_config.h. Moved emm_state_t into nas_emm_state.h and nas_emm_state.cc. 4 years ago
Pedro Alvarez 96f39da5d7 Fixes for airplane simulator. 4 years ago
Pedro Alvarez 14844a168a Created new class to hold all NAS states for the NAS state machine. Added EMM-DEREGISTERED substates and EMM-REGISTERED substates. 
Decoupled PLMN selection, attach request and service request. Removed RRC connect procedure from NAS.
 4 years ago
Andre Puschmann 2be85217fd mac,ue: reset demux when restting MAC 
this potentially fixes the issue we see during HO and RLF
under high DL load.

The issue happens because buffered DL PDUs are delivered to
RLC after reestablishing RLC that confuse the receiving
RLC entity bc the sequence numbers are very high, as opposed
to begin with zero again after reestablishment.
 4 years ago
Andre Puschmann 7cf919e2af Fix MAC PDU packing after sending Truncated BSR (#2004) 
* mac_test: add extended TBSR unit test

unit test to MAC UL packing after sending a TBSR

this fixes the MAC issues described in issue #2002

* mux: fix updating of LCG buffer state after packing PDU

we've previously lowered the buffer state of the LCG according
to the bytes that have been scheduled, but not according to
those that have been actually included in the PDU.

* proc_bsr: fix LCG buffer state updating for TBSR

when sending a TBSR do not update the internal buffer
state of the BSR proc.

This caused issues because the buffer state for all LCG that
are not included in the TBSR are set to zero, although at least
one LCG does have data to transmit.

* rlc_am: include LCID when logging retx of SN
 4 years ago
Francisco Paisana 510959b50f update nr asn1 files, and asn1 tests 4 years ago
Andre Puschmann 082e002b67 nas: fix airplane mode simulation 
the current implementation was somehow broken after a
NAS refactor. It was undetected because we didn't really
use it.

this fixes the simulation by using a single timer to simulate
airplane mode transitions.
the timer is rearmed in the timer_expire() function
if the correspondig event is set.

Has been tested to work well with, e.g.:

--sim.airplane_t_on_ms 5000 --sim.airplane_t_off_ms 10000
 4 years ago
Andre Puschmann fd5cde525c proc_bsr: fix race condition in BSR reporting 
fix for #1934

This fixes a race condition between Stack thread and DL
PDU processing that lead to updates of the RLC buffer that
are undetected by the BSR routine.

What happens is that in a UL SCH PDU all outstanding data is transmitted
and and a LBSR with all zero buffers is sent.

14:39:47.327301 [MAC ] [D] [ 3793] BSR:   LCID=3 old_buffer=59
14:39:47.330600 [MAC ] [I] [ 3793] UL LCID=3 len=58 LBSR: b=0 0 0 0

Note that "old_buffer" isn't set to zero here.

At the same time (same TTI), the MAC PDU processing thread handles DL-SCH PDUs
that may generate new UL PDUs:

14:39:47.330749 [RLC ] [I] DRB1 Tx SDU (54 B, tx_sdu_queue_len=1)
14:39:47.330762 [RLC ] [I] DRB1 Tx SDU (54 B, tx_sdu_queue_len=2)
14:39:47.330775 [RLC ] [I] DRB1 Tx SDU (54 B, tx_sdu_queue_len=3)
..

Those PDUs are "new data" since the previous buffer state was zero.

Here is the race now between the threads, at the end of the bsr::step() function
old_buffer of each LCG is updated with the previous new_buffer, so
the buffer state of LCG=2 is now 59.

Now MAC starts the next TTI:

14:39:47.331910 [MAC ] [D] [ 3794] Running MAC tti=3794
14:39:47.331928 [MAC ] [D] [ 3794] Update Bj: lcid=0, Bj=0
14:39:47.331934 [MAC ] [D] [ 3794] Update Bj: lcid=1, Bj=0
14:39:47.331938 [MAC ] [D] [ 3794] Update Bj: lcid=2, Bj=0
14:39:47.331941 [MAC ] [D] [ 3794] Update Bj: lcid=3, Bj=-1752
14:39:47.331951 [MAC ] [D] [ 3794] BSR:   LCID=0 update new buffer=0
14:39:47.331960 [MAC ] [D] [ 3794] BSR:   LCID=1 update new buffer=0
14:39:47.331964 [MAC ] [D] [ 3794] BSR:   LCID=2 update new buffer=0
14:39:47.331971 [MAC ] [D] [ 3794] BSR:   LCID=3 update new buffer=335
14:39:47.331976 [MAC ] [D] [ 3794] BSR:    check_new_data() -> get_buffer_state_lcg(0)=0
14:39:47.331980 [MAC ] [D] [ 3794] BSR:    check_new_data() -> get_buffer_state_lcg(1)=0
14:39:47.331984 [MAC ] [D] [ 3794] BSR:    check_new_data() -> get_buffer_state_lcg(2)=59
14:39:47.331988 [MAC ] [D] [ 3794] BSR:    check_new_data() -> get_buffer_state_lcg(3)=0
14:39:47.331993 [MAC ] [D] [ 3794] BSR:   LCID=0 old_buffer=0
14:39:47.332000 [MAC ] [D] [ 3794] BSR:   LCID=1 old_buffer=0
14:39:47.332003 [MAC ] [D] [ 3794] BSR:   LCID=2 old_buffer=0
14:39:47.332007 [MAC ] [D] [ 3794] BSR:   LCID=3 old_buffer=335

And since the buffer state of LCG=2 isn't zero, the new data for LCID=3 of that LCG is considered.
So effectivly, the BSR missed the "empty" buffer state for a fraction of time and doesn't
consider the outgoing data generated in the same TTI as new. It therefore
doesn't transmit a BSR.

in which a BSR wasn't
 4 years ago
Andre Puschmann d5286e70aa proc_bsr: refactor and add extra print_state() method 
allows to call the print_state() routine from other places in the BSR
 4 years ago
Francisco Paisana 514deaf25b fix resetting of phy and mac during reestablishment 4 years ago
Andre Puschmann a366500a78 rrc_proc: init cs_result to none 
detected by Coverity CID 363053
 4 years ago
Francisco Paisana 665b3996bb now the phy controller handles the scenario where the phy cell selection failed to be initialized 4 years ago
Andre Puschmann 937067a205 proc_phr: rename start_periodic_timer() and make sure its only started if a valid config is present 4 years ago
Andre Puschmann fab86382c1 mac,rrc: add interface to set SR config explicitly without touching any other MAC function 
when releasing PUCCH/SRS (see 5.3.13 in 36.331) we need to reset the SR config as well.
In our case, SR is handled by MAC so we need to (re-)configure MAC, not all of
MAC though, just SR.
 4 years ago
Francisco Paisana e7239163e9 silence noisy unhandled in_sync_ev logs 4 years ago
Francisco Paisana f185272367 added comments explaining the meaning of the cell reselection procedures 4 years ago