8107939f08
- all RAN code, CI code, configuration files, dockerfiles, in CSSL v1.0
- all deployment code (openshift, charts, ancillary files like shell
scripts), in MIT
- documentation in CC-BY-4.0
- exceptions might apply and are listed in NOTICE
- there is a new LICENSES folder with all licenses
- CONTRIBUTIONS.md has been updated accordingly
For automated changes based on OAI PL v1.1:
perl -i~ -0pe 's/\/\*.*Licensed to the OpenAirInterface.*openairinterface.org\n#?/\/*\n * SPDX-License-Identifier: LicenseRef-CSSL-1.0\n/s' **/*.{c,h,cpp}
perl -i~ -0pe 's/\/\*.*Licensed to the OpenAirInterface.*openairinterface.org\n#?/\/*\n * SPDX-License-Identifier: LicenseRef-CSSL-1.0\n/s' **/*.ts
perl -i~ -0pe 's/<!--.*Licensed to the OpenAirInterface.*openairinterface.org\n.*-->/<!-- SPDX-License-Identifier: LicenseRef-CSSL-1.0 -->/s' **/*.xml
The rest (cmake, files with missing license, cmake) manually.
1.7 KiB
The gNB RACH Processing
1. Collect I/Q Samples
The gNB/ru main loop, in ru_thread()
If there is rach occasions in this slot
this main loop calls rx_nr_prach_ru() that stores the I/Q samples in the prach_item_t context.
2. Process the Samples
L1_rx_thread() has received slot indication by msg on queue resp_L1, it calls rx_func() => L1_nr_prach_procedures()
L1_nr_prach_procedures() fills nfapi_nr_rach_indication_t structure from result of rx_nr_prach() that process the content of rxsigF[prachOccasion][aa]
rx_func() sends the decoded rach to upper processing by call to NR_UL_indication() that calls handle_nr_rach() => nr_initiate_ra_proc().
nr_initiate_ra_proc() creates a UE context if it needs, then sets UE.ra.ra_state to what it should do.
3. Send the RACH DL
tx_func() that is launched by L1_tx_thread() as it gets L1_tx_out msg (from main loop in 1.)
tx_func()=>run_scheduler_monolithic()=>gNB_dlsch_ulsch_scheduler()=>nr_scheduler_RA()
nr_scheduler_RA() process all existing UE contexts, to see it it has to schedule a RACH DL.
4. Global Synchronisation
resp_L1 msg for (2.) is created in tx_func() that is launched by L1_tx_thread() (see 3.) when it receives slot indication as it gets L1_tx_out msg
this msg is sent by the main loop (see 1.)
tx_func()=>run_scheduler_monolithic()=>nr_schedule_response ()=>nr_schedule_ul_tti_req ()=> nr_schedule_rx_prach()
writes in the triggering structure to (1.) that it will have to run rx_nr_prach_ru() in a given future slot.