From 420aaf371ea12ce55237ed5bff13d32bf157e895 Mon Sep 17 00:00:00 2001
From: Sakthivel Velumani <velumani@eurecom.fr>
Date: Wed, 29 Jul 2020 16:47:45 +0200
Subject: [PATCH] Added print messages for debugging

---
 openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_phytest.c | 13 +++++++++++--
 openair2/NR_PHY_INTERFACE/NR_IF_Module.c           | 10 ++++++++++
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_phytest.c b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_phytest.c
index ae66107512..91c9ae2144 100644
--- a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_phytest.c
+++ b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_phytest.c
@@ -53,6 +53,7 @@
 #include "NR_SearchSpace.h"
 #include "NR_ControlResourceSet.h"
 
+#define UL_HARQ_PRINT
 extern RAN_CONTEXT_t RC;
 
 const uint8_t nr_rv_round_map[4] = {0, 2, 1, 3}; 
@@ -783,15 +784,23 @@ uint8_t select_ul_harq_pid(NR_UE_sched_ctrl_t *sched_ctrl) {
   NR_UE_ul_harq_t cur_harq;
   for (hrq_id=0; hrq_id < max_ul_harq_pids; hrq_id++) {
     cur_harq = sched_ctrl->ul_harq_processes[hrq_id];
-    if (cur_harq.state==ACTIVE_NOT_SCHED)
+    if (cur_harq.state==ACTIVE_NOT_SCHED) {
+#ifdef UL_HARQ_PRINT
+      printf("[SCHED] Found active ulharq id %d, scheduling it for retransmission\n",harq_id); 
+#endif
       return hrq_id;
+    }
   }
 
   // schedule new harq processes
   for (hrq_id=0; hrq_id < max_ul_harq_pids; hrq_id++) {
     cur_harq = sched_ctrl->ul_harq_processes[hrq_id];
-    if (cur_harq.state==INACTIVE)
+    if (cur_harq.state==INACTIVE) {
+#ifdef UL_HARQ_PRINT
+      printf("[SCHED] Found inactive ulharq id %d, scheduling it\n",harq_id); 
+#endif
       return hrq_id;
+    }
   }
 }
 
diff --git a/openair2/NR_PHY_INTERFACE/NR_IF_Module.c b/openair2/NR_PHY_INTERFACE/NR_IF_Module.c
index dd736de0ca..1a08cd60d5 100644
--- a/openair2/NR_PHY_INTERFACE/NR_IF_Module.c
+++ b/openair2/NR_PHY_INTERFACE/NR_IF_Module.c
@@ -41,6 +41,7 @@
 #include "executables/softmodem-common.h"
 
 #define MAX_IF_MODULES 100
+#define UL_HARQ_PRINT
 
 NR_IF_Module_t *if_inst[MAX_IF_MODULES];
 NR_Sched_Rsp_t Sched_INFO[MAX_IF_MODULES][MAX_NUM_CCs];
@@ -141,15 +142,24 @@ void handle_nr_ul_harq(uint16_t slot, NR_UE_sched_ctrl_t *sched_ctrl, uint8_t cr
         cur_harq.ndi ^= 1;
         cur_harq.round = 0;
         cur_harq.state = INACTIVE; // passed -> make inactive. can be used by scheduder for next grant
+#ifdef UL_HARQ_PRINT
+        printf("[HARQ HANDLER] Ulharq id %d crc passed, freeing it for scheduler\n",hrq_id);
+#endif
       } else {
         cur_harq.round++;
         cur_harq.state = ACTIVE_NOT_SCHED;
+#ifdef UL_HARQ_PRINT
+        printf("[HARQ HANDLER] Ulharq id %d crc failed, requesting retransmission\n",hrq_id);
+#endif
       }
 
       if (!(cur_harq.round<max_harq_rounds)) {
         cur_harq.ndi ^= 1;
         cur_harq.state = INACTIVE; // failed after 4 rounds -> make inactive
         cur_harq.round = 0;
+#ifdef UL_HARQ_PRINT
+        printf("[HARQ HANDLER] Ulharq id %d crc failed in all round, freeing it for scheduler\n",hrq_id);
+#endif
       }
       return;
     }