sched - handle the case when the CRC is missing and max retx is reached

srsenb/hdr/stack/mac/sched_ue_ctrl/sched_harq.h

@@ -24,9 +24,10 @@ class harq_proc
 {
 public:
   harq_proc();
-  void     init(uint32_t id);
-  void     reset(uint32_t tb_idx);
-  uint32_t get_id() const;
+  void init(uint32_t id);
+  void reset(uint32_t tb_idx);
+
+  uint32_t get_id() const { return id; }
   bool     is_empty() const;
   bool     is_empty(uint32_t tb_idx) const;
 
@@ -62,6 +63,9 @@ class dl_harq_proc : public harq_proc
 {
 public:
   dl_harq_proc();
+
+  void new_tti(tti_point tti_tx_dl);
+
   void new_tx(const rbgmask_t& new_mask,
               uint32_t         tb_idx,
               tti_point        tti_tx_dl,
@@ -86,6 +90,8 @@ private:
 class ul_harq_proc : public harq_proc
 {
 public:
+  void new_tti();
+
   void new_tx(srsran::tti_point tti, int mcs, int tbs, prb_interval alloc, uint32_t max_retx_, bool is_msg3);
   void new_retx(srsran::tti_point tti_, int* mcs, int* tbs, prb_interval alloc);
   bool set_ack(uint32_t tb_idx, bool ack);

srsenb/src/stack/mac/sched.cc

@@ -297,7 +297,7 @@ int sched::dl_sched(uint32_t tti_tx_dl, uint32_t enb_cc_idx, sched_interface::dl
     return 0;
   }
 
-  tti_point tti_rx = tti_point{tti_tx_dl} - FDD_HARQ_DELAY_UL_MS;
+  tti_point tti_rx = tti_point{tti_tx_dl} - TX_ENB_DELAY;
   new_tti(tti_rx);
 
   // copy result
@@ -318,7 +318,7 @@ int sched::ul_sched(uint32_t tti, uint32_t enb_cc_idx, srsenb::sched_interface::
   }
 
   // Compute scheduling Result for tti_rx
-  tti_point tti_rx = tti_point{tti} - FDD_HARQ_DELAY_UL_MS - FDD_HARQ_DELAY_DL_MS;
+  tti_point tti_rx = tti_point{tti} - TX_ENB_DELAY - FDD_HARQ_DELAY_DL_MS;
   new_tti(tti_rx);
 
   // copy result

srsenb/src/stack/mac/sched_grid.cc

@@ -686,7 +686,8 @@ void sf_sched::set_dl_data_sched_result(const sf_cch_allocator::alloc_result_t&
     // Print Resulting DL Allocation
     fmt::memory_buffer str_buffer;
     fmt::format_to(str_buffer,
-                   "SCHED: DL {} rnti=0x{:x}, cc={}, pid={}, mask=0x{:x}, dci=({}, {}), n_rtx={}, tbs={}, buffer={}/{}",
+                   "SCHED: DL {} rnti=0x{:x}, cc={}, pid={}, mask=0x{:x}, dci=({}, {}), n_rtx={}, tbs={}, "
+                   "buffer={}/{}, tti_tx_dl={}",
                    is_newtx ? "tx" : "retx",
                    user->get_rnti(),
                    cc_cfg->enb_cc_idx,
@@ -697,7 +698,8 @@ void sf_sched::set_dl_data_sched_result(const sf_cch_allocator::alloc_result_t&
                    dl_harq.nof_retx(0) + dl_harq.nof_retx(1),
                    tbs,
                    data_before,
-                   user->get_requested_dl_bytes(cc_cfg->enb_cc_idx).stop());
+                   user->get_requested_dl_bytes(cc_cfg->enb_cc_idx).stop(),
+                   get_tti_tx_dl());
     logger.info("%s", srsran::to_c_str(str_buffer));
   }
 }

srsenb/src/stack/mac/sched_ue_ctrl/sched_harq.cc

@@ -45,11 +45,6 @@ void harq_proc::reset(uint32_t tb_idx)
   tx_cnt[tb_idx]    = 0;
 }
 
-uint32_t harq_proc::get_id() const
-{
-  return id;
-}
-
 bool harq_proc::is_empty() const
 {
   for (uint32_t i = 0; i < SRSRAN_MAX_TB; ++i) {
@@ -83,14 +78,7 @@ int harq_proc::set_ack_common(uint32_t tb_idx, bool ack_)
   }
   ack_state[tb_idx] = ack_;
   logger->debug("ACK=%d received pid=%d, tb_idx=%d, n_rtx=%d, max_retx=%d", ack_, id, tb_idx, n_rtx[tb_idx], max_retx);
-  if (!ack_ && (n_rtx[tb_idx] + 1 >= max_retx)) {
-    logger->info("SCHED: discarding TB=%d pid=%d, tti=%d, maximum number of retx exceeded (%d)",
-                 tb_idx,
-                 id,
-                 tti.to_uint(),
-                 max_retx);
-    active[tb_idx] = false;
-  } else if (ack_) {
+  if (ack_) {
     active[tb_idx] = false;
   }
   return SRSRAN_SUCCESS;
@@ -161,6 +149,20 @@ dl_harq_proc::dl_harq_proc() : harq_proc()
   n_cce = 0;
 }
 
+void dl_harq_proc::new_tti(tti_point tti_tx_dl)
+{
+  for (uint32_t tb = 0; tb < SRSRAN_MAX_TB; ++tb) {
+    if (has_pending_retx(tb, tti_tx_dl) and nof_retx(tb) + 1 >= max_nof_retx()) {
+      logger->info("SCHED: discarding DL TB=%d pid=%d, tti=%d, maximum number of retx exceeded (%d)",
+                   tb,
+                   get_id(),
+                   tti.to_uint(),
+                   max_retx);
+      active[tb] = false;
+    }
+  }
+}
+
 void dl_harq_proc::new_tx(const rbgmask_t& new_mask,
                           uint32_t         tb_idx,
                           tti_point        tti_tx_dl,
@@ -222,9 +224,18 @@ void dl_harq_proc::reset_pending_data()
 }
 
 /******************************************************
- *                  UE::UL HARQ class                    *
+ *                  UE::UL HARQ class                 *
  ******************************************************/
 
+void ul_harq_proc::new_tti()
+{
+  if (has_pending_retx() and nof_retx(0) + 1 >= max_nof_retx()) {
+    logger->info(
+        "SCHED: discarding UL pid=%d, tti=%d, maximum number of retx exceeded (%d)", get_id(), tti.to_uint(), max_retx);
+    active[0] = false;
+  }
+}
+
 prb_interval ul_harq_proc::get_alloc() const
 {
   return allocation;
@@ -329,6 +340,12 @@ void harq_entity::reset()
 void harq_entity::new_tti(tti_point tti_rx)
 {
   last_ttis[tti_rx.to_uint() % last_ttis.size()] = tti_rx;
+  for (auto& hul : ul_harqs) {
+    hul.new_tti();
+  }
+  for (auto& hdl : dl_harqs) {
+    hdl.new_tti(to_tx_dl(tti_rx));
+  }
 }
 
 dl_harq_proc* harq_entity::get_empty_dl_harq(tti_point tti_tx_dl)