--- a/src/lte/model/lte-ue-phy.cc	2015-02-05 21:46:22.000000000 -0200
+++ a/src/lte/model/lte-ue-phy.cc	2015-04-08 20:02:58.000000000 -0300
@@ -558,9 +558,11 @@ LteUePhy::GenerateCqiRsrpRsrq (const Spe
               // store measurements
               std::map <uint16_t, UeMeasurementsElement>::iterator itMeasMap;
               itMeasMap = m_ueMeasurementsMap.find ((*itPss).cellId);
-              NS_ASSERT (itMeasMap != m_ueMeasurementsMap.end ());
-              (*itMeasMap).second.rsrqSum += rsrq_dB;
-              (*itMeasMap).second.rsrqNum++;
+              if (itMeasMap != m_ueMeasurementsMap.end ())
+              {
+                (*itMeasMap).second.rsrqSum += rsrq_dB;
+                (*itMeasMap).second.rsrqNum++;
+              }
             }
 
           itPss++;