gnb: add PUCCH config for 256 UEs

Signed-off-by: Carlo Galiotto <[email protected]>

Author: carlo-gal

configs/cell_cfg_max_256_ues.yml

@@ -0,0 +1,28 @@
+#   This file contains the PUCCH configuration for the gNB to support:
+#   - SR period 20ms or 40ms.
+#   - CSI period 20ms or 40ms.
+#   - Max 128 UEs.
+
+#   NOTEs:
+#   - This configuration is optimized for TDD 7D-2U configuration, but it still works for TDD configurations
+#     with more than 2 UL slots.
+#   - This configuration might work for more than 128 UEs, although it hasn't been tested for those scenarios.
+
+cell_cfg:
+  pucch:
+    sr_period_ms: 20   # This can be set either 20 or 40 ms.
+    nof_ue_res_harq_per_set: 8
+    nof_cell_harq_pucch_sets: 2    # Increase this if UEs are not scheduled PDSCH due to PUCCH resources starvation.
+    f0_or_f1_nof_cell_res_sr: 50
+    f2_nof_cell_res_csi: 50
+  csi:
+    csi_rs_period: 40  # This can be set either 20 or 40 ms.
+  ul_common:
+    max_ul_grants_per_slot: 128
+    max_pucchs_per_slot: 120
+  pusch:
+    max_puschs_per_slot: 8
+  tdd_ul_dl_cfg:
+    nof_dl_symbols: 7
+    nof_dl_slots: 7
+    nof_ul_slots: 2

include/srsran/ran/slot_pdu_capacity_constants.h

@@ -65,7 +65,7 @@ static constexpr size_t MAX_PUSCH_PDUS_PER_SLOT = 16U;
 static constexpr size_t MAX_UL_PDCCH_PDUS_PER_SLOT = 16U;
 
 /// [Implementation defined] Maximum number of PUCCH PDUs per slot.
-static constexpr size_t MAX_PUCCH_PDUS_PER_SLOT = 64U;
+static constexpr size_t MAX_PUCCH_PDUS_PER_SLOT = 128U;
 
 /// [Implementation defined] Maximum number of SRS PDUs per slot.
 static constexpr size_t MAX_SRS_PDUS_PER_SLOT = 32U;