diff --git a/src/lte/model/lte-enb-phy.cc b/src/lte/model/lte-enb-phy.cc
index 53c48cc7a..8d66883ee 100644
--- a/src/lte/model/lte-enb-phy.cc
+++ b/src/lte/model/lte-enb-phy.cc
@@ -894,7 +894,7 @@ LteEnbPhy::DoSetSrsConfigurationIndex (uint16_t  rnti, uint16_t srcCi)
       // inhibit SRS until RRC Connection Reconfiguration propagates
       // to UEs, otherwise we might be wrong in determining the UE who
       // actually sent the SRS (if the UE was using a stale SRS config)
-      m_srsStartTime = Simulator::Now () + MilliSeconds (m_macChTtiDelay) + MilliSeconds (3);
+      m_srsStartTime = Simulator::Now () + MilliSeconds (m_macChTtiDelay) + MilliSeconds (20);
     }
 
   NS_LOG_DEBUG (this << " ENB SRS P " << m_srsPeriodicity << " RNTI " << rnti << " offset " << GetSrsSubframeOffset (srcCi) << " CI " << srcCi);
diff --git a/src/lte/model/lte-ue-phy.cc b/src/lte/model/lte-ue-phy.cc
index 4778eca02..be8ad7d8d 100644
--- a/src/lte/model/lte-ue-phy.cc
+++ b/src/lte/model/lte-ue-phy.cc
@@ -899,7 +899,7 @@ LteUePhy::DoSetSrsConfigurationIndex (uint16_t srcCi)
   // to make sure no UE sends SRSs before all UEs received the new SRS configuration.
   // Note that the eNB will send the new SRS config to all UEs at the same time,
   // but with the real RRC model the time it takes to reach each UE might vary.
-  m_srsStartTime = Simulator::Now () + MilliSeconds (3);
+  m_srsStartTime = Simulator::Now () + MilliSeconds (20);
   NS_LOG_DEBUG (this << " UE SRS P " << m_srsPeriodicity << " RNTI " << m_rnti << " offset " << m_srsSubframeOffset << " cellId " << m_cellId << " CI " << srcCi);
 }