As we don't have SIB19 with continuously updated ta-Common and ta-CommonDrift values yet, the UE can only adapt it's UL timing according to it's DL drift.
This is required for the UE to keep UL sync with fast time drift and relatively long RTT (e.g. LEO satellite).
We should replace this with the standard compliant way as soon as we have SIB19 with continuously updated contents.
While we don't have SIB19 support yet, UE gets this parameter from command line, just like --ntn-koffset and --ntn-ta-common.
We use this value to initialize the UE's time-tracking PI controller accumulator.
This allows to correctly track the time even if the delay is changing significantly (e.g. due to LEO satellite movement).
We also use it to compensate for the time drift that happenes while performing the initial sync.
This now allows to indicate "there was a new sampleShift calculation, and the actual value is 0"
additionally to "there was no new sampleShift calculation".
* In LTE there is logic that checks the thread configurtion with the
getters `get_thread_parallel_conf()` and `get_thread_worker_conf()`
in NR these getters are not used, only setters, which have no impact
* strdup is returning a malloced string that needs to freed after use
> Direct leak of 90 byte(s) in 1 object(s) allocated from:
>0 0x7ffff745b9a7 in __interceptor_strdup ../../../../src/libsanitizer/asan/asan_interceptors.cpp:454
>1 0x555556c7b341 in main /executables/nr-uesoftmodem.c:461
>2 0x7ffff5e29d8f in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58
* strdup is returning a malloced string which needs to be freed after use
> Direct leak of 90 byte(s) in 1 object(s) allocated from:
> 0 0x7ffff745b9a7 in __interceptor_strdup ../../../../src/libsanitizer/asan/asan_interceptors.cpp:454
> 1 0x5555591598a3 in main /executables/nr-softmodem.c:667
> 2 0x7ffff5e29d8f in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58
Remove netlink code, and the PDCP_USE_NETLINK macro, as there is no
known use, it makes the code more complicated, and is simply "technical
debt".
In 4G PDCP, a subtle change has been introduced, in pdcp_module_init()
of pdcp.c. Looking at the diff of this commit, it can be seen that there
is now a new "else-if (ENB_NAS_USE_TUN_W_MBMS_BIT)" branch that is under
what was the "if (PDCP_USE_NETLINK)" branch, while the code fragment was
actually inside the "else" branch of PDCP_USE_NETLINK. This seems to be
necessary: previously, if we did not use noS1 mode and we don't use any
TUN (i.e., the eNB), the else block would set up this interface. It is
important that this interface is brought up, because if we omit it,
RFsim will not work. It seems to me that this interface will regularly
create some traffic; without it, RFsim will be blocked, and the UE
cannot connect.
In short, it seems to be important to have the MBMS interface, which
injects traffic in the RFsim side, which will unblock RFsim. The change
in pdcp_module_init() preserves the total changes of the if-else
(PDCP_USE_NETLINK).
Remove function pointers that were used in the past to implement the
F1(-U) interface in 4G, i.e., to have different functions to handle
split/monolithic operations. As we don't have F1 in 4G anymore (see
commit 9dc2282249), we don't need the
function pointers anymore.
On that occasion, rename the 5G functions by prepending nr_ to them;
this allows to refactor the interface in 5G further (which is not the
focus of this changeset).
- if search fails, keeps increasing the rx gain (set by --ue-rxgain) by
3 db until USRP max rx gain
- if initial sync is success, sets the rxgain to the value of
(TARGET_RX_POWER (50) - pbch digital power in dB/RE)
making aerial shm prefix configurable (so we can use muliptle VNFs per PNF)
making the nvipc thread affinity configurable and using threadCreate.
removing aerial_vnf_nr_aerial_p7_start_thread
Integration: `2024.w28`
See merge request oai/openairinterface5g!2856
* !2847 UE setting wrong frequency in 5G rfsimulator SA test
* !2850 NR UE MAC DCI 00 BWP handling
* !2852 \[E2 agent\] Move UE RRC_CONNECTED state signaling
* !2851 Minor code cleanup and fixes
* !2842 UE assertion for msg1_SubcarrierSpacing in RA
* !2831 PUSCH power control state
* !2838 NR UE UL FAPI PDU length fix
* !2723 add initial NTN support for NR UE
* !2764 Adding 7.2 containerfiles and docker-compose
* !2827 Increase RX_DATA.indication PDU Length to 32 bits
Correct the array by taking out a verification entry in the verification
array that led to runtime error
Assertion (numparams == (sizeof(cmdline_CheckParams)/sizeof(*(cmdline_CheckParams)))) failed!
In get_common_options() /home/richie/openairinterface5g/executables/softmodem-common.c:109
Error in arrays size (41!=42)
According to the RRC specification, cellSpecificKoffset is:
Scheduling offset used for the timing relationships that are modified for NTN (see TS 38.213 [13]).
The unit of the field K_offset is number of slots for a given subcarrier spacing of 15 kHz.
If the field is absent UE assumes value 0
This parameter `cellSpecificKoffset_r17` can be set via UE command line parameter `--ntn-koffset`.
- Reworked nrLDPC_decoder_offload.c to process all segments in a TB with a single call to LDPCdecoder() or LDPCencoder().
- Perform CRC checks on the T2.
- Modified nr_ulsch_decoding (gNB decoder) to:
- Count processed segments.
- Properly perform CRC checks.
- Created a constant NR_LDPC_MAX_NUM_CB to define the maximum number of codeblocks.
- Conditional library loading:
- On gNB: Load ldpc_t2 library if offload is enabled using the --ldpc-offload-enable flag.
- On UE: Load both ldpc_t2 and ldpc libraries since only encoder offload is supported.
- General cleanup of nrLDPC_decoder_offload.c for improved readability and maintainability.
- Modified the structure of LDPC encoder/decoder/offload parameters:
- Introduced a structure for code block (CB) related parameters.
- Removed parameter E from the encoder and offload parameter structures for clarity.
- Replaced E with perCB->E_cb in the UE encoder code.
Thomas Schlichter