diff --git a/datalink814_ge/src/linklayer/time_sync.c b/datalink814_ge/src/linklayer/time_sync.c
index a5df6bb..a73f725 100644
--- a/datalink814_ge/src/linklayer/time_sync.c
+++ b/datalink814_ge/src/linklayer/time_sync.c
@@ -112,7 +112,7 @@ static void RTT_StageUpdate(L2_RTT_FSM* rttFsmPtr, L2_RTT_SATGE newSatge) {
 void RTT_Reset(L2_RTT_FSM* rttFsmPtr){
 	ASSERT(rttFsmPtr != NULL);
 	memset(&(rttFsmPtr->rttRecord), 0x00, sizeof(RTT_RECORD));
-	rttFsmPtr->rttStatge = RTT_NONE_STAGE;
+	rttFsmPtr->rttStatge = RTT_REQ1;
 	rttFsmPtr->isR1Valid = false;
 	rttFsmPtr->isR2Valid = false;
 	rttFsmPtr->isR3Valid = false;
@@ -353,7 +353,7 @@ int32_t RTT_FsmUpdate(L2_INST* instPtr, L2_TOR_TYPE torType) {
 				DBG_INFO("Tr4-timeH:%08X.\n", rttRecord->Tr4.int_part);
 				DBG_INFO("TroundA-timeL:%08X.\n", rttRecord->TroundA.frac_part);
 				DBG_INFO("TroundA-timeH:%08X.\n", rttRecord->TroundA.int_part);
-				RTT_StageUpdate(rttFsmPtr, RTT_NONE_STAGE);
+				RTT_StageUpdate(rttFsmPtr, RTT_REQ1);
 				DBG_INFO("RTT procedure end...\n");
 			}
 			else{
@@ -477,7 +477,7 @@ int32_t RTT_FsmUpdate(L2_INST* instPtr, L2_TOR_TYPE torType) {
 				// Prepare data for sending.
 				rttFsmPtr->timeStamp = rttRecord->TreplyB;
 				rttFsmPtr->doppler = rttRecord->dopplerR3;
-				RTT_StageUpdate(rttFsmPtr, RTT_NONE_STAGE);
+				RTT_StageUpdate(rttFsmPtr, RTT_REQ1);
 				DBG_INFO("RTT procedure end...\n");
 			}
 			else{