From f765352be7309bf798c6faa19440f7875d210025 Mon Sep 17 00:00:00 2001
From: luis_pereira87 <lpereira@allbesmart.pt>
Date: Thu, 6 Mar 2025 16:23:37 +0000
Subject: [PATCH] Reset timing_advance on sync/re-sync

This prevents the UE to use an outdated timing_advance after a re-sync. It prevents the UE to send a PRACH with a wrong TA, thus preventing a RAPID mismatch in Msg2 (example: '[UE 0][RAPROC][0.0] Received RAR preamble (29) doesn't match the intended RAPID (30)')
---
 executables/nr-ue.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/executables/nr-ue.c b/executables/nr-ue.c
index a5c4f69ed5..d954c6756b 100644
--- a/executables/nr-ue.c
+++ b/executables/nr-ue.c
@@ -970,6 +970,8 @@ void *UE_thread(void *arg)
       syncMsg->UE = UE;
       memset(&syncMsg->proc, 0, sizeof(syncMsg->proc));
       pushNotifiedFIFO(&UE->sync_actor.fifo, Msg);
+      timing_advance = 0;
+      UE->timing_advance = 0;
       trashed_frames = 0;
       syncRunning = true;
       continue;