Merge remote-tracking branch 'eurecom/develop' into episys/mel/merge_develop_cfra_working

common/utils/nr/nr_common.c

@@ -106,6 +106,40 @@ nr_bandentry_t nr_bandtable[] = {
   {261,27500040,28350000,27500040,28350000,  2,2070833, 120}
 };
 
+uint16_t get_band(uint64_t downlink_frequency, int32_t delta_duplex)
+{
+  const uint64_t dl_freq_khz = downlink_frequency / 1000;
+  const int32_t  delta_duplex_khz = delta_duplex / 1000;
+
+  uint64_t center_freq_diff_khz = 999999999999999999; // 2^64
+  uint16_t current_band = 0;
+
+  for (int ind = 0; ind < nr_bandtable_size; ind++) {
+
+    if (dl_freq_khz < nr_bandtable[ind].dl_min || dl_freq_khz > nr_bandtable[ind].dl_max)
+      continue;
+
+    int32_t current_offset_khz = nr_bandtable[ind].ul_min - nr_bandtable[ind].dl_min;
+
+    if (current_offset_khz != delta_duplex_khz)
+      continue;
+
+    uint64_t center_frequency_khz = (nr_bandtable[ind].dl_max + nr_bandtable[ind].dl_min) / 2;
+
+    if (abs(dl_freq_khz - center_frequency_khz) < center_freq_diff_khz){
+      current_band = nr_bandtable[ind].band;
+      center_freq_diff_khz = abs(dl_freq_khz - center_frequency_khz);
+    }
+  }
+
+  printf("DL frequency %"PRIu64": band %d, UL frequency %"PRIu64"\n",
+        downlink_frequency, current_band, downlink_frequency+delta_duplex);
+
+  AssertFatal(current_band != 0, "Can't find EUTRA band for frequency %"PRIu64" and duplex_spacing %u\n", downlink_frequency, delta_duplex);
+
+  return current_band;
+}
+
 const size_t nr_bandtable_size = sizeof(nr_bandtable) / sizeof(nr_bandentry_t);
 
 int NRRIV2BW(int locationAndBandwidth,int N_RB) {

common/utils/nr/nr_common.h

@@ -50,6 +50,7 @@ typedef struct nr_bandentry_s {
 extern const size_t nr_bandtable_size;
 extern nr_bandentry_t nr_bandtable[];
 
+uint16_t get_band(uint64_t downlink_frequency, int32_t delta_duplex);
 int NRRIV2BW(int locationAndBandwidth,int N_RB);
 int NRRIV2PRBOFFSET(int locationAndBandwidth,int N_RB);
 int PRBalloc_to_locationandbandwidth0(int NPRB,int RBstart,int BWPsize);

common/utils/system.c

@@ -209,6 +209,10 @@ int background_system(char *command) {
 void start_background_system(void) {
   int p[2];
   pid_t son;
+
+  if (module_initialized == 1)
+    return;
+
   module_initialized = 1;
 
   if (pipe(p) == -1) {