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srsRAN_4G
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7348 Commits (12f998cea358ae0e063d0514187945b2fbbae08c)
 

Author SHA1 Message Date
Xavier Arteaga f8dd67260f Polar: fix unit test working directory 4 years ago
Xavier Arteaga 15356b3ec8 Fix compilation for non-AVX2 machines 4 years ago
Xavier Arteaga 2c4aa1e379 Added Polar and LDPC forward error correction 4 years ago
Francisco Paisana a351b2534e allow PUSCH grants for CQI in PCell 4 years ago
Francisco Paisana 2ade364434 defer scell activation to rrc reconf complete reception 4 years ago
David Rupprecht 387a84ff84 Updated missing byte 4 years ago
David Rupprecht b85cb614aa Added test cases for asn1 decoding lib from pcap 4 years ago
Andre Puschmann 74dcdec54f enb: fix antenna port count for SCell config in RRC reconfig 
set antenna port count for SCells in RRC reconfig message according
to configured ports in the enb config
 4 years ago
Xavier Arteaga 271002c9fb Fix compilation 4 years ago
Xavier Arteaga 4f89c6ed3f Added missing CMakeFiles 4 years ago
Xavier Arteaga f21590735d refactored FEC directories 4 years ago
Xavier Arteaga 7093a85f81 Refactored FEC directories 4 years ago
Xavier Arteaga 32ea840a30 INTRA: better ring-buffer protection 4 years ago
Xavier Arteaga c2621cc4f8 Protect ring-buffer write from nullptr 4 years ago
Xavier Arteaga 369cffec00 More deterministic SCell search test 4 years ago
Francisco Paisana a865858db3 disable srbs UL during handover to avoid UL grants and scheduling requests before the handover is complete 4 years ago
Andre Puschmann f647343f18 rlc_am: fix poll bit during header reconstruction 
this makes sure that the reconstructed RLC AM header
has the poll bit set when any of its segments had it set.

this triggered a bug in RLC AM because the Status PDU
isn't transmitted for a RLC PDU that was segmented and
only the first segment had the P flag set.
 4 years ago
Francisco Paisana 484c7586b4 fix heap buffer overflow 4 years ago
Francisco Paisana 42cdc5e340 Allocate all the leftover bytes of the TBS to last allocated MAC SDU. 
Fix the way the RLC header is accounted for depending on the bearer id.
For instance, the SRB0 does not require any RLC header.
 4 years ago
Francisco Paisana 55d62a2baa fix rlc buffer updating inside the scheduler to account for RLC headers 4 years ago
Francisco Paisana 980278fdec add comments regarding radio resource asn1 setting in the eNB 4 years ago
Francisco Paisana 84cfc29ca1 apply the scell configuration sooner during intra-enb handover 4 years ago
Francisco Paisana b40a5a958e use common function to fill rrc reconf message in handover 4 years ago
Francisco Paisana e9b693942f diff-based cell selection activation 4 years ago
Francisco Paisana 836e7d7ede refactor scell addition in the srsenb::rrc to follow the same style of other rrc recfg fields 4 years ago
Francisco Paisana a8e11d7991 removal of the special case for rrc reconf update 4 years ago
Francisco Paisana f26b5ccde7 fix drb reestablishment during handover 4 years ago
Francisco Paisana 7bf196a6e0 removal of srb handling from srsenb::rrc::bearer_cfg_handler 4 years ago
Francisco Paisana 2ef1e286b2 fix set of rrc reconf message radio resource cfg fields 4 years ago
Francisco Paisana 890113fd32 now the rrc enb is using a common function for rr_cfg reconf for the first reconf message 4 years ago
Francisco Paisana ce78fa82ce now the rrc enb is using a common function for rr_cfg setup/reest 4 years ago
Francisco Paisana 97f2e4336e refactor of functions for filling the asn1 radio resource config structs. This functions are used during rrc setup/reest/reconf 4 years ago
Xavier Arteaga 9487d27ef9 Renamed NR constants and comments 4 years ago
Xavier Arteaga e8f168b20c PDSCH NR: Added files 4 years ago
Xavier Arteaga c8477483d9 PDSCH NR: Added files 4 years ago
Xavier Arteaga 30d8e05d50 Fix PDSCH-DMRS symbol index 4 years ago
Xavier Arteaga 275cbafe6e Modified comments 4 years ago
Xavier Arteaga 8d34d344a8 Created PDSCH-NR configuration structures and refactored DMRS 4 years ago
Xavier Arteaga 009f300c5e Initial PHY Data procedures 4 years ago
Xavier Arteaga 775692f461 Rearanged PDCCH NR functions structures 4 years ago
Xavier Arteaga 452eb2dbbf Updated some DOCS 4 years ago
Xavier Arteaga 937c52339d Added PDCCH DMRS estimation and measurement 4 years ago
Xavier Arteaga 5799100e42 FFT based Resampler admits NULL inputs/outputs 4 years ago
Xavier Arteaga 44ae70dcc6 Initial implementation of the 5G NR PDCCH DMRS encoding 4 years ago
Xavier Arteaga 29ad2427d9 Initial implementation of the 5G NR PDCCH DMRS encoding 4 years ago
Xavier Arteaga 579526f1fe Added sequence advance without generating data 4 years ago
Xavier Arteaga fa837925d0 Fix inter-frequency/intra-enb HO 4 years ago
Xavier Arteaga eba20b6367 Radio: fix frame overlap at start-of-burst 4 years ago
Xavier Arteaga a5f9ea5654 SRSUE: force paging for every cell reselection procedure end 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