Enhanced nr_phy_test with better PRACH stats

test/phy/dummy_gnb_stack.h

@@ -36,7 +36,9 @@ class gnb_dummy_stack : public srsenb::stack_interface_phy_nr
 public:
   struct prach_metrics_t {
     uint32_t count;
-    float    avg_ta;
+    float    avg_ta = 0.0f;
+    float    min_ta = +INFINITY;
+    float    max_ta = -INFINITY;
   };
   struct pucch_metrics_t {
     float    epre_db_avg = 0.0f;
@@ -706,6 +708,8 @@ public:
     std::unique_lock<std::mutex> lock(metrics_mutex);
     prach_metrics_t&             prach_metrics = metrics.prach[rach_info.preamble];
     prach_metrics.avg_ta = SRSRAN_VEC_SAFE_CMA((float)rach_info.time_adv, prach_metrics.avg_ta, prach_metrics.count);
+    prach_metrics.min_ta = SRSRAN_MIN((float)rach_info.time_adv, prach_metrics.min_ta);
+    prach_metrics.max_ta = SRSRAN_MAX((float)rach_info.time_adv, prach_metrics.max_ta);
     prach_metrics.count++;
   }
 

test/phy/dummy_ue_stack.h

@@ -29,6 +29,7 @@ public:
 
 private:
   std::mutex                     rnti_mutex;
+  srsran_random_t                random_gen     = srsran_random_init(0x1323);
   srsran_rnti_type_t             dl_rnti_type   = srsran_rnti_type_c;
   uint16_t                       rnti           = 0;
   bool                           valid          = false;
@@ -58,7 +59,7 @@ public:
   {
     valid = true;
   }
-  ~ue_dummy_stack() = default;
+  ~ue_dummy_stack() { srsran_random_free(random_gen); }
   void in_sync() override {}
   void out_of_sync() override {}
   void run_tti(const uint32_t tti) override
@@ -68,8 +69,12 @@ public:
       uint32_t slot_idx = tti % SRSRAN_NSLOTS_PER_FRAME_NR(srsran_subcarrier_spacing_15kHz);
       uint32_t sfn      = tti / SRSRAN_NSLOTS_PER_FRAME_NR(srsran_subcarrier_spacing_15kHz);
       if (slot_idx == 0 and sfn % prach_period == 0) {
-        phy.send_prach(0, prach_preamble, 0.0f, 0.0f);
-        metrics.prach[prach_preamble].count++;
+        uint32_t prach_preamble_ = prach_preamble;
+        if (prach_preamble_ >= 64) {
+          prach_preamble_ = srsran_random_uniform_int_dist(random_gen, 0, 63);
+        }
+        phy.send_prach(0, prach_preamble_, 0.0f, 0.0f);
+        metrics.prach[prach_preamble_].count++;
       }
     }
   }

test/phy/nr_phy_test.cc

@@ -25,6 +25,7 @@ static double assert_sr_detection_min  = 1.000;
 static double assert_cqi_detection_min   = 1.000;
 static double assert_pusch_bler_max      = 0.000;
 static double assert_pdsch_bler_max      = 0.000;
+static double assert_prach_detection_min = 1.000;
 
 test_bench::args_t::args_t(int argc, char** argv)
 {
@@ -236,34 +237,57 @@ int main(int argc, char** argv)
   }
 
   // Print PRACH
+  double   prach_detection = 0.0;
+  uint32_t prach_tx_count  = 0;
+  uint32_t prach_rx_count  = 0;
   if (metrics.ue_stack.prach.size() > 0) {
     srsran::console("PRACH:\n");
-    srsran::console("  UE transmitted:\n");
-    srsran::console("   +------------+------------+\n");
-    srsran::console("   | %10s | %10s |\n", "preamble", "count");
-    srsran::console("   +------------+------------+\n");
+    srsran::console(
+        "   +------------+------------+------------+------------+------------+------------+------------+\n");
+    srsran::console("   | %10s | %10s | %10s | %10s | %10s | %10s | %10s |\n",
+                    "Preamble",
+                    "Transmit'd",
+                    "Received",
+                    "Detection",
+                    "Avg TA",
+                    "Min TA",
+                    "Max TA");
+    srsran::console(
+        "   +------------+------------+------------+------------+------------+------------+------------+\n");
 
     for (const auto& p : metrics.ue_stack.prach) {
-      srsran::console("   | %10d | %10d |\n", p.first, p.second.count);
-
       // Ensure the detected count matches with transmission
-      TESTASSERT(metrics.gnb_stack.prach.count(p.first));
-      TESTASSERT(metrics.gnb_stack.prach[p.first].count == p.second.count);
+      //      TESTASSERT(metrics.gnb_stack.prach.count(p.first));
+      //      TESTASSERT(metrics.gnb_stack.prach[p.first].count == p.second.count);
+      TESTASSERT(p.second.count != 0);
+      prach_tx_count += p.second.count;
+
+      gnb_dummy_stack::prach_metrics_t gnb_prach = {};
+      if (metrics.gnb_stack.prach.count(p.first) > 0) {
+        gnb_prach = metrics.gnb_stack.prach[p.first];
+      } else {
+        gnb_prach.avg_ta = NAN;
+        gnb_prach.min_ta = NAN;
+        gnb_prach.max_ta = NAN;
       }
-    srsran::console("   +------------+------------+\n\n");
-
-    srsran::console("  GNB detected:\n");
-    srsran::console("   +------------+------------+------------+\n");
-    srsran::console("   | %10s | %10s | %10s |\n", "preamble", "count", "avg TA");
-    srsran::console("   +------------+------------+------------+\n");
-
-    for (const auto& p : metrics.gnb_stack.prach) {
-      srsran::console("   | %10d | %10d | %10.1f |\n", p.first, p.second.count, p.second.avg_ta);
-
-      // Ensure all detected preambles were transmitted
-      TESTASSERT(metrics.ue_stack.prach.count(p.first) > 0);
+      prach_rx_count += gnb_prach.count;
+
+      double detection = (double)gnb_prach.count / (double)p.second.count;
+
+      srsran::console("   | %10d | %10d | %10d | %10.3f | %10.1f | %10.1f | %10.1f |\n",
+                      p.first,
+                      p.second.count,
+                      gnb_prach.count,
+                      detection,
+                      gnb_prach.avg_ta,
+                      gnb_prach.min_ta,
+                      gnb_prach.max_ta);
+    }
+    srsran::console(
+        "   +------------+------------+------------+------------+------------+------------+------------+\n");
   }
-    srsran::console("   +------------+------------+------------+\n\n");
+  if (prach_tx_count > 0) {
+    prach_detection = (double)prach_rx_count / (double)prach_tx_count;
   }
 
   // Print PUCCH
@@ -410,6 +434,10 @@ int main(int argc, char** argv)
                 "CQI report detection probability (%f) did not reach the assertion minimum (%f)",
                 cqi_detection,
                 assert_sr_detection_min);
+  srsran_assert(prach_tx_count == 0 or prach_detection >= assert_prach_detection_min,
+                "PRACH detection probability (%f) did not reach the assertion minimum (%f)",
+                prach_detection,
+                assert_prach_detection_min);
 
   // If reached here, the test is successful
   return SRSRAN_SUCCESS;