From 9ab7373251b0aae002cfa0ded647b43f096ea542 Mon Sep 17 00:00:00 2001
From: Francisco <francisco.paisana@softwareradiosystems.com>
Date: Wed, 20 Jan 2021 15:28:07 +0000
Subject: [PATCH] Encode correctly DCI format2A when one of the TBs is empty

---
 srsenb/src/stack/mac/sched_ue.cc | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/srsenb/src/stack/mac/sched_ue.cc b/srsenb/src/stack/mac/sched_ue.cc
index 23e86bd59..f32e026c9 100644
--- a/srsenb/src/stack/mac/sched_ue.cc
+++ b/srsenb/src/stack/mac/sched_ue.cc
@@ -452,7 +452,18 @@ tbs_info sched_ue::allocate_new_dl_mac_pdu(sched::dl_sched_data_t* data,
     h->new_tx(
         user_mask, tb, tti_tx_dl, tb_info.mcs, tb_info.tbs_bytes, data->dci.location.ncce, get_ue_cfg().maxharq_tx);
   } else {
-    Warning("SCHED: Failed to allocate DL harq pid=%d\n", h->get_id());
+    uint32_t pending_bytes = lch_handler.get_dl_tx_total();
+    if (pending_bytes > 0) {
+      Warning("SCHED: Failed to allocate DL TB with tb_idx=%d, tbs=%d, pid=%d. Pending DL buffer data=%d\n",
+              tb,
+              rem_tbs,
+              h->get_id(),
+              lch_handler.get_dl_tx_total());
+    } else {
+      Info("SCHED: DL TB tb_idx=%d, tbs=%d, pid=%d did not get allocated.\n", tb, rem_tbs, h->get_id());
+    }
+    tb_info.tbs_bytes = 0;
+    tb_info.mcs       = 0;
   }
 
   return tb_info;