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Add telnet trigger for N2 handover

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* the command gets in input the neighbour PCI and the UE ID
* the telnet ci function to retrieve the UE context was extended in the process
* add function to trigger handover on the same gNB for testing purposes

Co-authored-by: batuhan duyuler <batuhan.duyuler@firecell.io>
This commit is contained in:
Guido Casati
2025-09-18 11:34:31 +02:00
co-authored by batuhan duyuler
parent cb68d817f0
commit 5227becf89
2 changed files with 98 additions and 0 deletions
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openair2/RRC/NR/rrc_gNB_mobility.c
+49
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@@ -549,3 +549,52 @@ void nr_rrc_trigger_n2_ho(gNB_RRC_INST *rrc,
rrc_gNB_send_NGAP_HANDOVER_REQUIRED(rrc, ue, neighbour_config, hoPrepInfo);
free_byte_array(hoPrepInfo);
}
extern const nr_neighbour_cell_t *get_neighbour_cell_by_pci(const neighbour_cell_configuration_t *cell, int pci);
extern const neighbour_cell_configuration_t *get_neighbour_cell_config(const gNB_RRC_INST *rrc, int cell_id);
void nr_HO_N2_trigger_telnet(gNB_RRC_INST *rrc, uint32_t neighbour_pci, uint32_t rrc_ue_id)
{
rrc_gNB_ue_context_t *ue_context_p = rrc_gNB_get_ue_context(rrc, rrc_ue_id);
if (ue_context_p == NULL) {
LOG_E(NR_RRC, "N2 HO trigger failed for UE %d: cannot find UE context\n", rrc_ue_id);
return;
}
gNB_RRC_UE_t *UE = &ue_context_p->ue_context;
struct nr_rrc_du_container_t *du = get_du_for_ue(rrc, rrc_ue_id);
if (du == NULL) {
LOG_E(NR_RRC, "N2 HO trigger failed for UE %d: Unknown DU\n", rrc_ue_id);
return;
}
uint16_t scell_pci = du->setup_req->cell[0].info.nr_pci;
// Simulate handover on the same cell (testing purposes)
if (neighbour_pci == scell_pci) {
LOG_I(NR_RRC, "UE %d: trigger handover on the same cell PCI=%d\n", rrc_ue_id, neighbour_pci);
nr_neighbour_cell_t neighbourConfig = {
.isIntraFrequencyNeighbour = true,
.gNB_ID = du->setup_req->gNB_DU_id,
.nrcell_id = du->setup_req->cell[0].info.nr_cellid,
.physicalCellId = du->setup_req->cell[0].info.nr_pci,
.plmn = du->setup_req->cell[0].info.plmn,
.subcarrierSpacing = du->setup_req->cell[0].info.tdd.tbw.scs,
};
nr_rrc_trigger_n2_ho(rrc, UE, neighbour_pci, &neighbourConfig);
return;
}
const f1ap_served_cell_info_t *scell_du = get_cell_information_by_phycellId(scell_pci);
DevAssert(scell_du);
LOG_I(NR_RRC, "UE %d: triggered N2 HO, source PCI=%d to target PCI=%d\n", rrc_ue_id, scell_pci, neighbour_pci);
const neighbour_cell_configuration_t *cell = get_neighbour_cell_config(rrc, scell_du->nr_cellid);
const nr_neighbour_cell_t *neighbour = get_neighbour_cell_by_pci(cell, neighbour_pci);
if (neighbour == NULL) {
LOG_E(NR_RRC, "N2 HO trigger failed for UE %d: could not find neighbour cell with PCI=%d\n", rrc_ue_id, neighbour_pci);
return;
}
nr_rrc_trigger_n2_ho(rrc, UE, scell_du->nr_pci, neighbour);
}