Minimal TLVs to do Beamforming with Aerial 25.2

nfapi/open-nFAPI/fapi/src/nr_fapi_p5.c

@@ -1143,15 +1143,21 @@ uint8_t pack_nr_config_request(void *msg, uint8_t **ppWritePackedMsg, uint8_t *e
                         &pack_uint8_tlv_value);
   numTLVs++;
   // END Measurement Config
-#ifndef ENABLE_AERIAL
+#ifdef ENABLE_AERIAL
-  // START Digital Beam Table (DBT) PDU
+  retval &= pack_nr_tlv(NFAPI_NR_CONFIG_NUM_TX_PORT_TAG,
-  if (pNfapiMsg->dbt_config.num_dig_beams != 0) {
+                        &(pNfapiMsg->carrier_config.num_tx_port),
-    nfapi_nr_dbt_tlv_ve_t dbt_tlv = {.tl.tag = NFAPI_NR_CONFIG_BEAMFORMING_TABLE_TAG, .value = pNfapiMsg->dbt_config};
+                        ppWritePackedMsg,
-    pack_nr_tlv(NFAPI_NR_CONFIG_BEAMFORMING_TABLE_TAG, &dbt_tlv, ppWritePackedMsg, end, &pack_dbt_table_tlv_value);
+                        end,
-    numTLVs++;
+                        &pack_uint16_tlv_value);
-  }
+  numTLVs++;
-  // END Digital Beam Table (DBT) PDU
 
+  retval &= pack_nr_tlv(NFAPI_NR_CONFIG_NUM_RX_PORT_TAG,
+                        &(pNfapiMsg->carrier_config.num_rx_port),
+                        ppWritePackedMsg,
+                        end,
+                        &pack_uint16_tlv_value);
+  numTLVs++;
+#else  
   // START Precoding Matrix (PM) PDU
   if (pNfapiMsg->pmi_list.num_pm_idx != 0) {
     nfapi_nr_pm_tlv_ve_t pm_tlv = {.tl.tag = NFAPI_NR_CONFIG_PRECODING_TABLE_V6_TAG, .value = pNfapiMsg->pmi_list};

nfapi/open-nFAPI/nfapi/public_inc/nfapi_nr_interface_scf.h

@@ -332,6 +332,10 @@ typedef struct
 #define NFAPI_NR_CONFIG_TDD_TABLE 0x1035
 #define NFAPI_NR_CONFIG_BEAMFORMING_TABLE_TAG 0x1043 // This tag was added in version 5 of the SCF222 standard ( Table 3-50 of SCF222.10.05 )
 #define NFAPI_NR_CONFIG_PRECODING_TABLE_V6_TAG 0x104B // This tag was added in version 6 of the SCF222 standard ( Table 3-52 of SCF222.10.06 )
+#ifdef ENABLE_AERIAL
+  #define NFAPI_NR_CONFIG_NUM_TX_PORT_TAG 0xA016
+  #define NFAPI_NR_CONFIG_NUM_RX_PORT_TAG 0xA017
+#endif
 
 //table 3-21
 typedef struct 
@@ -347,6 +351,8 @@ typedef struct
   nfapi_uint16_tlv_t ul_grid_size[5];//Grid size 𝑁𝑔𝑟𝑖𝑑 𝑠𝑖𝑧𝑒,𝜇 for each of the numerologies [38.211, sec 4.4.2]. Value: 0->275 0 = this numerology not used
   nfapi_uint16_tlv_t num_rx_ant;//
   nfapi_uint8_tlv_t  frequency_shift_7p5khz;//Indicates presence of 7.5KHz frequency shift. Value: 0 = false 1 = true
+  nfapi_uint16_tlv_t num_tx_port; //used by Aerial L1 when BF mode is enabled to signal the number of logical antenna ports
+  nfapi_uint16_tlv_t num_rx_port; //used by Aerial L1 when BF mode is enabled to signal the number of logical antenna ports
 
 } nfapi_nr_carrier_config_t; 
 

openair2/LAYER2/NR_MAC_gNB/config.c

@@ -691,7 +691,19 @@ static void config_common(gNB_MAC_INST *nrmac, const nr_mac_config_t *config, NR
               cfg->carrier_config.num_tx_ant.value);
   cfg->num_tlv++;
   cfg->num_tlv++;
-
+#ifdef ENABLE_AERIAL
+  if (nrmac->beam_info.beam_mode == PRECONFIGURED_BEAM_IDX) {
+    // if we are doing BF in Aerial we need these Custom TLV
+    cfg->carrier_config.num_rx_ant.value = 64; //TOOD: Read number of baseband ports (phy ant) from Config?
+    cfg->carrier_config.num_tx_ant.value = 64; //TOOD: Read number of baseband ports (phy ant) from Config? 
+  }else{
+    // In CAT-A Mode these are equal to num_rx_ant (and Aerial ignores the value)
+    cfg->carrier_config.num_rx_port.value = pusch_AntennaPorts;
+    cfg->carrier_config.num_rx_port.tl.tag = NFAPI_NR_CONFIG_NUM_RX_PORT_TAG;
+    cfg->carrier_config.num_tx_port.value = num_pdsch_antenna_ports;
+    cfg->carrier_config.num_tx_port.tl.tag = NFAPI_NR_CONFIG_NUM_TX_PORT_TAG;
+  }
+#endif
   // Frame structure configuration
   uint8_t mu = frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing;
   if (cfg->cell_config.frame_duplex_type.value == TDD) {