diff --git a/src/lte/model/lte-common.cc b/src/lte/model/lte-common.cc
index 2e38346b5..b83f0a6c1 100644
--- a/src/lte/model/lte-common.cc
+++ b/src/lte/model/lte-common.cc
@@ -78,6 +78,9 @@ uint16_t
 LteFfConverter::double2fpS11dot3 (double val)
 {
   // convert from double to fixed point notation Sxxxxxxxxxxx.xxx
+  // truncate val to notation limits
+  if (val > 4095.88) val = 4095.88;
+  if (val < -4096) val = -4096;
   int16_t valFp = (int16_t)(val * pow (2, 3));
   return (valFp);
 }
diff --git a/src/lte/model/pf-ff-mac-scheduler.cc b/src/lte/model/pf-ff-mac-scheduler.cc
index d5392f31e..c811be4b5 100644
--- a/src/lte/model/pf-ff-mac-scheduler.cc
+++ b/src/lte/model/pf-ff-mac-scheduler.cc
@@ -861,6 +861,7 @@ PfFfMacScheduler::DoSchedUlTriggerReq (const struct FfMacSchedSapProvider::Sched
         }
       uldci.m_tbSize = (m_amc->GetTbSizeFromMcs (uldci.m_mcs, rbPerFlow) / 8);
 //       NS_LOG_DEBUG (this << " UE " << (*it).first << " startPRB " << (uint32_t)uldci.m_rbStart << " nPRB " << (uint32_t)uldci.m_rbLen << " CQI " << cqi << " MCS " << (uint32_t)uldci.m_mcs << " TBsize " << uldci.m_tbSize << " RbAlloc " << rbAllocated);
+      UpdateUlRlcBufferInfo (uldci.m_rnti, uldci.m_tbSize);
       uldci.m_ndi = 1;
       uldci.m_cceIndex = 0;
       uldci.m_aggrLevel = 1;
diff --git a/src/lte/model/rr-ff-mac-scheduler.cc b/src/lte/model/rr-ff-mac-scheduler.cc
index 365b80665..171d17dee 100644
--- a/src/lte/model/rr-ff-mac-scheduler.cc
+++ b/src/lte/model/rr-ff-mac-scheduler.cc
@@ -744,6 +744,7 @@ RrFfMacScheduler::DoSchedUlTriggerReq (const struct FfMacSchedSapProvider::Sched
         
       uldci.m_tbSize = (m_amc->GetTbSizeFromMcs (uldci.m_mcs, rbPerFlow) / 8); // MCS 0 -> UL-AMC TBD
       NS_LOG_DEBUG (this << " UE " << (*it).first << " startPRB " << (uint32_t)uldci.m_rbStart << " nPRB " << (uint32_t)uldci.m_rbLen << " CQI " << cqi << " MCS " << (uint32_t)uldci.m_mcs << " TBsize " << uldci.m_tbSize);
+      UpdateUlRlcBufferInfo (uldci.m_rnti, uldci.m_tbSize);
       uldci.m_ndi = 1;
       uldci.m_cceIndex = 0;
       uldci.m_aggrLevel = 1;