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Author SHA1 Message Date
Thomas Schlichter a898c18ddc Update NTN in Feature Set 2025-10-24 15:11:36 +02:00
Thomas Schlichter ccad50daca NR UE: do not consider suspended logical channels in nr_update_bsr() 
While a logical channel is suspended, we should not consider it in the BSR,
as we cannot transmit any data from it.
 2025-09-23 11:17:44 +02:00
Thomas Schlichter 5c16758386 gNB: when creating a ReconfigurationWithSync, make sure epochTime_r17 is present if there is a ntn_Config_r17 
Fixes #995
 2025-09-22 11:06:16 +02:00
Thomas Schlichter 272be719dd NR UE: in nr_ue_scheduler.c set LCID_buffer_remain to 0 if RLC indicates not more bytes in buffer 
If the RLC indicates that there is no more data in the buffer, also the scheduler's
LCID_buffer_remain should be set to 0. Else the UE sends BSR indicating it has data
to be transmitted. The gNB would then unnecessarily schedule UL for this UE, which
would not be used, as there is no actual data to be transmitted.
 2025-09-19 12:11:58 +02:00
Thomas Schlichter 6b80fbf072 update doc/MAC/mac-usage.md 2025-09-09 11:17:43 +02:00
Thomas Schlichter b3242490f1 enable SSB-SINR reporting for NTN GEO scenario 2025-09-09 11:17:43 +02:00
Thomas Schlichter 2944775952 nr_ulsim: fix computation of the scrambling errors 
The array ul_harq_processes[harq_pid].f contains the data as bits, not bytes.
 2025-09-09 11:17:43 +02:00
Thomas Schlichter 4e87ac46a1 nr_dlsim: several fixes for low SNR scenarios 
If the DCI in PDCCH is not correctly received, no PDSCH would be decoded but counted as no error.
Also if the DCI was not correctly received, a TBS of 0 would be used in some computations and memory allocations.

Fix these not counting if there is no PDSCH decoding, and by using the known TBS instead of the one received from the DCI.
 2025-09-09 11:17:43 +02:00
Thomas Schlichter 1c63d44afd NR UE: make the power averaging IIR filter faster 
Especially high initial noise levels would stay too long and negatively impact the accuracy of later S(I)NR computations.
 2025-09-09 11:17:43 +02:00
Thomas Schlichter e70bb45ebd gNB: consider the measured PUSCH SNR when computing the UL MCS if only one round is used 2025-09-09 11:17:43 +02:00
Thomas Schlichter 9346b50eb3 gNB: consider also the min_mcs when computing the DL MCS if only one round is used 2025-09-09 11:17:43 +02:00
Thomas Schlichter a9a9dfe297 gNB: adjust the dl_max_mcs based on the reported SSB-SINR 2025-09-09 11:17:33 +02:00
Thomas Schlichter 2b2e9563ff gNB: add SSB-SINR measurement values to the MAC statistics output 2025-09-08 13:32:23 +02:00
Thomas Schlichter afc13c264c gNB: compute and store SSB-SINR in dB instead of just the SINR-index 2025-09-08 13:32:23 +02:00
Thomas Schlichter e5b68fb6ee NR UE: modify shift value in nr_dlsch_mmse() for improved performance 2025-08-25 09:29:38 +02:00
Thomas Schlichter eb6c195c9b NR UE NTN: consider acceleration on orbital path to calculate N_UE_TA_drift_variant 
The acceleration magnitude on the orbital path can be calculated as:

t = 2 * pi * r / v
omega = 2 * pi / t = v / r
acceleration = omega² * r = v² / r

Where t is the orbital period, r is the orbital radius, v is the orbital velocity, omega is the angular velocity.
The acceleration direction is from the SAT position towards the earth center.
To calculate the acceleration towards the UE, this is projected on the direction from the SAT to the UE.
 2025-08-09 07:37:35 +02:00
Thomas Schlichter 4de0e54a3a NR UE: further simplify and optimize the usage of the PDCCH LLR array 
The initial version of this patch was provided by "Laurent THOMAS <laurent.thomas@open-cells.com>"
 2025-08-08 17:41:15 +02:00
Thomas Schlichter a6ccdd1340 NR UE: fix pdcch llr_size calculation in nr_rx_pdcch() 2025-08-08 14:58:14 +02:00
Thomas Schlichter 506dc7da52 NR UE: invalidate SI window on successful SI reception to avoid wrongly reusing this old SI window for new SI reception 
This fix was suggested by Francesco Mani
 2025-08-04 10:52:08 +02:00
Thomas Schlichter 16fd1bb67c gNB: fix case when multiple Rel-17 SIBs would be defined 
The boolean value v17_sib was not set to true when allocating si_schedulingInfo_v17 and schedulingInfo2_r17.
So multiple Rel-17 SIBs would lead to multiple allocations and only the last SIB being actually configured.

Fix this by removing the redundant v17_sib variable and directly check if the memory was already allocated.
Also move the definition and allocation of si_schedulingInfo_v17 closer to its actual usage.
 2025-08-04 10:52:08 +02:00
Thomas Schlichter 7827a40f19 NTN config: setting sib1_tda is not required anymore 2025-08-04 10:52:08 +02:00
Thomas Schlichter d4f4cefd6b set ntn-UlSyncValidityDuration-r17 to 5 seconds for LEO scenario 
Now that we reliably receive SIB19, we can set the ntn-UlSyncValidityDuration-r17 to a sane value
and thus make sure that the UE always has up-to-date SIB19 information.
 2025-08-04 10:52:08 +02:00
Thomas Schlichter 53208bd163 NR UE: fix calculation of SI window expiry 2025-08-04 10:52:08 +02:00
Thomas Schlichter bbf4cd4a90 gNB: fix scheduling of rel-17 SIBs 2025-08-01 16:00:12 +02:00
Thomas Schlichter 5fb72906f3 gNB: fix NTN UL retransmissions 
Re-add to consider the cellSpecificKoffset_r17 for UL retransmissions.
This got lost in commit c8387d706c
 2025-07-01 07:48:21 +00:00
Thomas Schlichter ed54e0bbd1 NR_UE: make lcids_bj_pos an array of nr_lcordered_info_t pointers instead of structure elements 
This makes the array itself smaller and allows to store just a pointer in select_logical_channels() instead of copying the complete structure element.
 2025-06-24 14:56:35 +00:00
Thomas Schlichter 5856c89741 NR UE: do not select a suspended LCID for scheduling 
This fixes a lifelock in nr_ue_get_sdu(), because select_logical_channels() would select
a suspended LCID for scheduling, but fill_mac_sdu() would not provide data for it.
 2025-06-24 14:42:20 +00:00
Thomas Schlichter c3a11c4717 NR UE: fix condition when to print the error message in write_reorder_clear_context() 
We should print the error message when the mutex cannot be locked because it is already locked.
Unfortunately, the if() condition was inverted...
 2025-06-24 14:41:53 +00:00
Thomas Schlichter 7b991c4dbf NR UE: exit from configure_ntn_ta() if ntn_Config_r17 is not provided 2025-06-20 13:58:55 +00:00
Thomas Schlichter a3bb97b6b7 gNB: set invalid NTN parameters in prepare_scc(), so fix_scc() will free them when not used 2025-06-20 13:55:45 +00:00
Thomas Schlichter ef416234d9 NR UE: enable logging of NTN RRC timer information 
To verify the NTN epoch time and NTN timer calculations, enable the logging by default.
This only affects NTN configurations.
 2025-06-20 11:43:59 +00:00
Thomas Schlichter 1bb781b08c NR UE: trigger RRC timers based on RX frame and slot 
For NTN Epoch time calculations, we need to know the RX frame number.
 2025-06-20 11:24:06 +00:00
Thomas Schlichter 960f2e7101 NR UE: allow the epochTime-r17 in NTN-Config-r17 to be in the future 
The implementation is limited to epoch times that are not more than 5.12 seconds in the future (allowed are up to 10.24 seconds)
and ntn-UlSyncValidityDuration < 5.12 seconds (allowed are up to 90 seconds).

To fix this limitation, the hyper frame number HFN has to be introduced at the OAI UE!
 2025-06-20 11:24:06 +00:00
Thomas Schlichter a9a6ab367b NR UE: fix autonomous_ta to be applied only when we also adjust the DL sync 2025-06-20 11:24:06 +00:00
Thomas Schlichter 786f4877bc rfsimulator: for LEO NTN, update SIB19 information once for each frame 2025-06-20 11:24:06 +00:00
Thomas Schlichter e91fb33da3 NR UE: also use ta_CommonDriftVariant_r17 to calculate the initial timing advance 2025-06-20 11:24:06 +00:00
Thomas Schlichter 22866c3c1e NR UE: for consistency, rename ntn_ta_commondrift to N_common_ta_drift 2025-06-20 11:21:01 +00:00
Thomas Schlichter f7ab814a3c NR UE: remove unused elements from struc fapi_nr_dl_ntn_config_command_pdu 2025-06-20 11:18:59 +00:00
Thomas Schlichter 7ba63a2052 rfsimulator: for LEO NTN, calculate SAT acceleration towards gNB to determine ta-CommonDriftVariant-r17 2025-06-20 11:18:59 +00:00
Thomas Schlichter ece430b6c3 NR UE: use shorter member names for position_t structure 2025-06-20 11:18:59 +00:00
Thomas Schlichter f1d612c01b NR UE: improve initial timing advance calculation from SIB19 
Before, we only considered ta_Common_r17 and the SAT position from SIB19 to compute the initial timing advance value.
This is good enough if the satellite does not move too fast (e.g. GEO satellite).

Now we also consider ta_CommonDrift_r17 and the SAT velocity together with the epoch time from SIB19.
This improves the accuracy of the initial TA computation, esp. for LEO satellite scenarios.
 2025-06-20 11:18:48 +00:00
Thomas Schlichter 42bc0d4eb3 rfsimulator: update SIB19 contents every second for LEO channel simulations 2025-06-20 11:15:49 +00:00
Thomas Schlichter 99f3628569 gNB: add function nr_update_sib19() allowing to update SIB19 information 2025-06-20 11:15:49 +00:00
Thomas Schlichter 0ddba90874 ci: test reestablishment for NTN GEO 2025-06-20 08:33:52 +00:00
Thomas Schlichter ffc0cd43a2 for NTN GEO scenario increase ul_AM_RLC.t_PollRetransmit timer to 2 seconds 2025-06-20 08:33:52 +00:00
Thomas Schlichter 400926115e NR UE: fix reestablishment for NTN 
During reestablishment the UE goes back to not synchronized state.
While the synchronizatin is running, we trash frames using the function readFrame().
And when we successfully synchronize, we skip samples to align with the start of the frame using syncInFrame().

In rfsimulator mode, both of these functions send dummy data using the function dummyWrite().
Unfortunately, the writeTimestamp provided to that function was always assuming a duration from RX to TX of NR_UE_CAPABILITY_SLOT_RX_TO_TX.
But in NTN mode, this value is changed when receiving SIB19.
Therefore we have to consider this changed value instead of the static one.
 2025-06-20 08:33:52 +00:00
Thomas Schlichter b264ddc1ec nrLDPC_coding_t2 fix: convert the correct number of LLRs from 16 Bit to 8 Bit 2025-05-20 08:55:31 +00:00
Thomas Schlichter 073a705720 nrLDPC_coding_t2: minor cleanup 2025-05-20 08:55:30 +00:00
Thomas Schlichter ffb8e8ff37 nrLDPC_coding_t2: nb_TBs is of type int 2025-05-20 08:53:57 +00:00
Thomas Schlichter c3d0b2db5c nrLDPC_coding_t2 fix: use rte_pktmbuf_mtod_offset() to consider offset when accessing output data 2025-05-20 08:51:37 +00:00
Thomas Schlichter 944ac15ab5 nrLDPC_coding_t2: allocate array of rte_bbdev_dec_op pointers on stack instead of heap 2025-05-20 08:00:36 +00:00
Thomas Schlichter 2df487fc8b nrLDPC_coding_t2: use rte_bbdev_op_type_str() instead of hardcoded array of strings 2025-05-20 08:00:36 +00:00
Thomas Schlichter af7054554b nrLDPC_coding_t2: make parameters for set_ldpc_dec_op() more smilar to set_ldpc_enc_op() 2025-05-20 08:00:36 +00:00
Thomas Schlichter d442461bd1 nrLDPC_coding_t2: remove unused start_idx from set_ldpc_enc_op() and set_ldpc_dec_op() 2025-05-20 08:00:35 +00:00
Thomas Schlichter b5c9e13df3 nrLDPC_coding_t2: remove unused #define HARQ_INCR 2025-05-20 07:57:23 +00:00
Thomas Schlichter 07ff8a27c4 nrLDPC_coding_t2: remove unused functions mbuf_reset() and check_bit() 2025-05-20 07:57:23 +00:00
Thomas Schlichter c1e057bc8b nrLDPC_coding_t2: remove unused atomic variables nb_dequeued and processing_status 2025-05-20 07:57:23 +00:00
Thomas Schlichter adbf056abb nrLDPC_coding_t2: remove unused global variable m_head 2025-05-20 07:57:23 +00:00
Thomas Schlichter 4dde956e84 nrLDPC_coding_t2: remove unused vector_mask 2025-05-20 07:57:23 +00:00
Thomas Schlichter b02e6e8ddd nrLDPC_coding_t2: inline and remove now nearly empty init_test_op_params() 2025-05-20 07:57:23 +00:00
Thomas Schlichter ea7e6ffb0b nrLDPC_coding_t2: remove unused num_to_process 2025-05-20 07:57:23 +00:00
Thomas Schlichter 73c6d1fb62 nrLDPC_coding_t2: remove unused burst_sz 2025-05-20 07:57:23 +00:00
Thomas Schlichter f47b549f41 nrLDPC_coding_t2: remove unused rte_bbdev_dec_op from test_op_params and thread_params 2025-05-20 07:57:23 +00:00
Thomas Schlichter e45aff7763 nrLDPC_coding_t2: replace global mp_dec and mp_enc by bbdev_op_pool in thread_params 2025-05-20 07:57:23 +00:00
Thomas Schlichter 300346c43a nrLDPC_coding_t2: replace global q_bufs by struct data_buffers on stack 2025-05-20 07:57:23 +00:00
Thomas Schlichter 48e78ff4b0 nrLDPC_coding_t2: fix q_bufs memory leak 2025-05-20 07:57:23 +00:00
Thomas Schlichter ac9a8f017b nrLDPC_coding_t2 fix: make sure to free allocated mbufs 
The DPDK driver may directly provide the internal HW mbuf in the dequeued structure.
So don't try to free the mbufs from that dequeued structure, but the ones we allocated.
 2025-05-20 07:57:21 +00:00
Thomas Schlichter 1612ba33a8 nrLDPC_coding_t2: remove unused soft_outputs, harq_inputs and harq_outputs elements 2025-05-20 07:56:26 +00:00
Thomas Schlichter d8b3bfd17b nrLDPC_coding_t2: use nb_segments_decoding() and nb_segments_encoding() to calculate num_segments 2025-05-20 07:56:24 +00:00
Thomas Schlichter 084bbb0363 nrLDPC_coding_t2: also support newer DPDK versions 2025-05-20 07:54:12 +00:00
Thomas Schlichter 8f93424e53 Adapt NTN-LEO config after integration branch runs 2025-04-22 15:47:41 +02:00
Thomas Schlichter 1aa6aab120 NR UE: in nr_slot_fep() perform FO compensation in local tmp_dft_in array instead of global rxdata array 
This avoids problems if nr_slot_fep() is called more than once for an OFDM symbol.
 2025-04-16 17:42:11 +00:00
Thomas Schlichter 5f8aeaacc9 fix CI files for NTN LEO scenario 2025-04-16 17:00:36 +00:00
Thomas Schlichter 5ac3f59d61 NR UE: fix and improve PHY layer debugging 2025-04-16 12:59:13 +00:00
Thomas Schlichter 67482f5d85 CI: add NR UE conf file including NTN LEO channel model 2025-04-10 14:36:01 +00:00
Thomas Schlichter 6e06c817f4 NR UE: remove now unnecessary local variable update_ntn_system_information 
directly use `UE->ntn_config_message->update` instead
 2025-04-10 13:56:20 +00:00
Thomas Schlichter 997790f656 NR UE: remove unused nr_slot_tx_offset 
`nr_slot_tx_offset` is unused since commit f3e60a1417
 2025-04-10 13:56:20 +00:00
Thomas Schlichter a9132a2f79 NR UE: in nr_adjust_synch_ue() extend the peak search to +/- cyclic prefix size 
esp. for LEO NTN scenarios the timing drifts during initial sync, which is mostly compensated with --ntn-initial-time-drift.
But there might be a residual time offset, and by extending the peak search window we make this more tolerant.
 2025-04-10 13:56:20 +00:00
Thomas Schlichter 4e3a7ad56e Extend NTN LEO example in RUNMODEM.md to include continuous Doppler compensation 2025-04-10 13:56:20 +00:00
Thomas Schlichter 29ed144764 use SIMD to speed up nr_fo_compensation() 2025-04-10 13:56:20 +00:00
Thomas Schlichter d6585f3750 rfsimulator: enable and correct NTN LEO doppler simulation 2025-04-10 13:56:20 +00:00
Thomas Schlichter 18469302d8 NR UE: add PI controller to continuous frequency offset compensation 2025-04-10 13:56:20 +00:00
Thomas Schlichter 84712f5f92 NR UE: add support for continuous UL frequency offset pre-compensation 
Depending on the main source of frequency offset, pre-compensate the UL frequency offset (FO) accordingly.
Therefore modify the flag `--cont-fo-comp` to accept an integer value, where
 - `1` specifies, that the main FO contribution comes from the accuracy of the local oscillator (LO)
 - `2` specifies, that the main FO contribution comes from Doppler shift
 2025-04-10 13:56:13 +00:00
Thomas Schlichter aac4642910 NR UE: add support for continuous DL frequency offset compensation (--cont-fo-comp) 2025-04-10 13:54:59 +00:00
Thomas Schlichter 616568a79d NR UE: add command line parameter --initial-fo to specify known initial frequency offset 2025-04-10 13:54:50 +00:00
Thomas Schlichter d16507055f NR UE: continuously estimate the frequency offset using PBCH DMRS 2025-04-10 12:37:19 +00:00
Thomas Schlichter dd827c7bd8 refactor (co)sinus calculation out of phase_noise() into openair1/PHY/TOOLS/get_sin_cos.c 2025-04-10 12:37:19 +00:00
Thomas Schlichter 9e4df97d84 move function add_noise() to file openair1/SIMULATION/TOOLS/phase_noise.c 2025-04-10 12:36:30 +00:00
Thomas Schlichter 0d01efa00b NR UE: don't activate HARQ process for PUCCH transmission if feedback is disabled 
Currently we still activated the DL HARQ process for PUCCH transmission,
and only at the time of the scheduled PUCCH transmission, we actually skip sending the ACK.
This is not only unnecessary, it is at least misleading and strange that
DL HARQ processes can be reused in the meantime, even though they are active...

Therefore simply don't activate the DL HARQ process by skipping the call to set_harq_status() if feedback for it is disabled.
 2025-04-01 10:00:46 +00:00
Thomas Schlichter cfde90dc85 rfsimulator: apply deadlock detection only if more than one client is connected 2025-03-27 09:54:20 +00:00
Thomas Schlichter 981ecb5dde NR UE: fix nr_pbch_channel_estimation() 2025-03-27 09:50:17 +00:00
Thomas Schlichter 66485aeb1d correctly set cellBarredNTN_r17 for NTN band again 
fixes e73e04543a
 2025-03-27 09:46:29 +00:00
Thomas Schlichter 0bc46a22c6 move NTN LEO config to band 254 and update doc/RUNMODEM.md 2025-02-14 17:04:47 +00:00
Thomas Schlichter 11b87d8744 NR UE: RRC layer now explicitly tells MAC layer when the RA procedure can be started 2025-02-14 17:04:47 +00:00
Thomas Schlichter b3581ce1b8 NR UE: simplify calculation of next_tx_slot_and_frame by moving up assignment of duration_rx_to_tx 2025-02-14 17:04:46 +00:00
Thomas Schlichter f1ae1025ad fix: ta-Common is a round-trip-time, not a one-way delay 2025-02-14 17:03:56 +00:00
Thomas Schlichter acac0b21bf update description how to run NTN scenarios in RUNMODEM.md 2025-02-14 17:03:56 +00:00
Thomas Schlichter cf0a1d6db4 update conf files for NTN LEO scenario 
Also added a dedicated conf file for NTN LEO, that can be used for CI.
 2025-02-14 17:03:56 +00:00
Thomas Schlichter 3fce7688aa rfsimulator: update earth radius for LEO simulation to match UE position in ue.conf file 2025-02-14 17:03:56 +00:00
Thomas Schlichter be2ed07911 NR UE: add MAC state UE_RECEIVING_SIB ensuring to start RA only after successfully receiving SIBs 2025-02-14 17:03:56 +00:00