adding nr_common.c

common/utils/nr/nr_common.c

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+/* \file config_ue.c
+ * \brief common utility functions for NR (gNB and UE)
+ * \author R. Knopp,
+ * \date 2019
+ * \version 0.1
+ * \company Eurecom
+ * \email: knopp@eurecom.fr
+ * \note
+ * \warning
+ */
+
+#include <stdint.h>
+#include "assertions.h"
+
+int NRRIV2BW(int locationAndBandwidth,int N_RB) {
+  int tmp = locationAndBandwidth/N_RB;
+  int tmp2 = locationAndBandwidth%N_RB;
+
+  if (tmp <= (N_RB-tmp2+1)) return(tmp);
+  else                      return(N_RB-tmp);
+
+}
+
+int NRRIV2PRBOFFSET(int locationAndBandwidth,int N_RB) {
+  int tmp = locationAndBandwidth/N_RB;
+  int tmp2 = locationAndBandwidth%N_RB;
+  
+  if (tmp <= (N_RB-tmp2+1)) return(tmp2);
+  else                      return(N_RB-tmp2);
+}
+
+int PRBalloc_to_locationanbandwidth(int NPRB,int RBstart) {
+  return(275*(NPRB-1)+RBstart);
+}
+
+/// Target code rate tables indexed by Imcs
+uint16_t nr_target_code_rate_table1[29] = {120, 157, 193, 251, 308, 379, 449, 526, 602, 679, 340, 378, 434, 490, 553, \
+                                            616, 658, 438, 466, 517, 567, 616, 666, 719, 772, 822, 873, 910, 948};
+  // Imcs values 20 and 26 have been multiplied by 2 to avoid the floating point
+uint16_t nr_target_code_rate_table2[28] = {120, 193, 308, 449, 602, 378, 434, 490, 553, 616, 658, 466, 517, 567, \
+                                            616, 666, 719, 772, 822, 873, 1365, 711, 754, 797, 841, 885, 1833, 948};
+uint16_t nr_target_code_rate_table3[29] = {30, 40, 50, 64, 78, 99, 120, 157, 193, 251, 308, 379, 449, 526, 602, 340, \
+                                            378, 434, 490, 553, 616, 438, 466, 517, 567, 616, 666, 719, 772};
+uint16_t nr_tbs_table[93] = {24, 32, 40, 48, 56, 64, 72, 80, 88, 96, 104, 112, 120, 128, 136, 144, 152, 160, 168, 176, 184, 192, 208, 224, 240, 256, 272, 288, 304, 320, \
+                              336, 352, 368, 384, 408, 432, 456, 480, 504, 528, 552, 576, 608, 640, 672, 704, 736, 768, 808, 848, 888, 928, 984, 1032, 1064, 1128, 1160, 1192, 1224, 1256, \
+                              1288, 1320, 1352, 1416, 1480, 1544, 1608, 1672, 1736, 1800, 1864, 1928, 2024, 2088, 2152, 2216, 2280, 2408, 2472, 2536, 2600, 2664, 2728, 2792, 2856, 2976, \
+                              3104, 3240, 3368, 3496, 3624, 3752, 3824};
+
+uint8_t nr_get_Qm(uint8_t Imcs, uint8_t table_idx) {
+  switch(table_idx) {
+    case 1:
+      return (((Imcs<10)||(Imcs==29))?2:((Imcs<17)||(Imcs==30))?4:((Imcs<29)||(Imcs==31))?6:-1);
+    break;
+
+    case 2:
+      return (((Imcs<5)||(Imcs==28))?2:((Imcs<11)||(Imcs==29))?4:((Imcs<20)||(Imcs==30))?6:((Imcs<28)||(Imcs==31))?8:-1);
+    break;
+
+    case 3:
+      return (((Imcs<15)||(Imcs==29))?2:((Imcs<21)||(Imcs==30))?4:((Imcs<29)||(Imcs==31))?6:-1);
+    break;
+
+    default:
+      AssertFatal(0, "Invalid MCS table index %d (expected in range [1,3])\n", table_idx);
+      return(0);
+      break;
+  }
+}
+
+uint32_t nr_get_code_rate(uint8_t Imcs, uint8_t table_idx) {
+  switch(table_idx) {
+    case 1:
+      return (nr_target_code_rate_table1[Imcs]);
+    break;
+
+    case 2:
+      return (nr_target_code_rate_table2[Imcs]);
+    break;
+
+    case 3:
+      return (nr_target_code_rate_table3[Imcs]);
+    break;
+
+    default:
+      AssertFatal(0, "Invalid MCS table index %d (expected in range [1,3])\n", table_idx);
+      return(0);
+      break;
+  }
+}