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Implement start_L1L2()

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Implements the re-start of the L1 after it has been stopped through
stop_L1(). It takes into account some changes, such as bandwidth, or
frequency, when restarting the L1. To this end, it also triggers a
gNB-DU configuration update message on each restart to inform the CU
about any changes in the DU. FDD has not been tested.
This commit is contained in:
Robert Schmidt
2024-12-16 16:18:11 +01:00
parent 8e32f566fc
commit 68ae3ea11c
1 changed files with 51 additions and 0 deletions
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executables/nr-softmodem.c
+51
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@@ -449,6 +449,57 @@ int stop_L1(module_id_t gnb_id)
return 0;
}
/*
* Restart the nr-softmodem after it has been soft-stopped with stop_L1L2()
*/
#include "openair2/LAYER2/NR_MAC_gNB/mac_proto.h"
int start_L1L2(module_id_t gnb_id)
{
LOG_I(GNB_APP, "starting nr-softmodem\n");
/* block threads */
oai_exit = 0;
sync_var = -1;
extern void init_sched_response(void);
init_sched_response();
/* update config */
gNB_MAC_INST *mac = RC.nrmac[0];
NR_ServingCellConfigCommon_t *scc = mac->common_channels[0].ServingCellConfigCommon;
nr_mac_config_scc(mac, scc, &mac->radio_config);
NR_BCCH_BCH_Message_t *mib = mac->common_channels[0].mib;
const NR_BCCH_DL_SCH_Message_t *sib1 = mac->common_channels[0].sib1;
/* update existing config in F1 Setup request structures */
f1ap_setup_req_t *sr = mac->f1_config.setup_req;
DevAssert(sr->num_cells_available == 1);
f1ap_served_cell_info_t *info = &sr->cell[0].info;
DevAssert(info->mode == F1AP_MODE_TDD);
DevAssert(scc->tdd_UL_DL_ConfigurationCommon != NULL);
info->tdd = read_tdd_config(scc); /* updates radio config */
/* send gNB-DU configuration update to RRC */
f1ap_gnb_du_configuration_update_t update = {
.transaction_id = 1,
.num_cells_to_modify = 1,
};
update.cell_to_modify[0].old_nr_cellid = info->nr_cellid;
update.cell_to_modify[0].info = *info;
update.cell_to_modify[0].sys_info = get_sys_info(mib, sib1);
mac->mac_rrc.gnb_du_configuration_update(&update);
init_NR_RU(config_get_if(), NULL);
start_NR_RU();
wait_RUs();
init_eNB_afterRU();
LOG_I(GNB_APP, "Sending sync to all threads\n");
pthread_mutex_lock(&sync_mutex);
sync_var=0;
pthread_cond_broadcast(&sync_cond);
pthread_mutex_unlock(&sync_mutex);
return 0;
}
static void wait_nfapi_init(char *thread_name)
{
pthread_mutex_lock( &nfapi_sync_mutex );