From cf8dff2093f0a65c3a90285290263b8bdc756aa5 Mon Sep 17 00:00:00 2001
From: Roberto Louro Magueta <rmagueta@allbesmart.pt>
Date: Mon, 13 Mar 2023 19:45:31 +0000
Subject: [PATCH] Implementation to update the RRC timers at UE

---
 executables/nr-uesoftmodem.c   |  5 +++++
 openair2/RRC/NR_UE/rrc_UE.c    | 26 ++++++++++++++++++++++++++
 openair2/RRC/NR_UE/rrc_proto.h |  3 +++
 3 files changed, 34 insertions(+)

diff --git a/executables/nr-uesoftmodem.c b/executables/nr-uesoftmodem.c
index eb6e160ec3..5cef04f195 100644
--- a/executables/nr-uesoftmodem.c
+++ b/executables/nr-uesoftmodem.c
@@ -211,6 +211,11 @@ int create_tasks_nrue(uint32_t ue_nb) {
   }
 
   itti_wait_ready(0);
+
+  // Thread to update the RRC timers (in msec) at UE
+  pthread_t timers_update;
+  threadCreate(&timers_update, nr_rrc_timers_update, NULL, "nr_rrc_timer_update", -1, OAI_PRIORITY_RT_LOW);
+
   return 0;
 }
 
diff --git a/openair2/RRC/NR_UE/rrc_UE.c b/openair2/RRC/NR_UE/rrc_UE.c
index 9f47cf7640..6ee8c762fc 100644
--- a/openair2/RRC/NR_UE/rrc_UE.c
+++ b/openair2/RRC/NR_UE/rrc_UE.c
@@ -2890,3 +2890,29 @@ void process_lte_nsa_msg(nsa_msg_t *msg, int msg_len)
             LOG_E(NR_RRC, "No NSA Message Found\n");
     }
 }
+
+void *nr_rrc_timers_update() {
+
+  while (1) {
+
+    for (int mod_id = 0; mod_id < NB_NR_UE_INST; mod_id++) {
+      for (int i = 0; i < NB_SIG_CNX_UE; i++) {
+        NR_UE_RRC_INFO *timers = &NR_UE_rrc_inst[mod_id].Info[i];
+
+        // T304
+        if (timers->T304_active == 1) {
+          if ((timers->T304_cnt % 100) == 0) {
+            LOG_W(NR_RRC, "T304: %u\n", timers->T304_cnt);
+          }
+          if (timers->T304_cnt == 1) {
+            timers->T304_active = 0;
+          }
+          timers->T304_cnt--;
+        }
+
+      }
+    }
+
+    usleep(1000);
+  }
+}
diff --git a/openair2/RRC/NR_UE/rrc_proto.h b/openair2/RRC/NR_UE/rrc_proto.h
index 48b8510de5..2739c7ccf8 100644
--- a/openair2/RRC/NR_UE/rrc_proto.h
+++ b/openair2/RRC/NR_UE/rrc_proto.h
@@ -162,6 +162,9 @@ int8_t nr_rrc_RA_succeeded(const module_id_t mod_id, const uint8_t gNB_index);
    \param void *args_p Pointer on arguments to start the task. */
 void *rrc_nrue_task(void *args_p);
 
+/**\brief RRC timers update at UE. */
+void *nr_rrc_timers_update();
+
 /**\brief RRC NSA UE task.
    \param void *args_p Pointer on arguments to start the task. */
 void *recv_msgs_from_lte_ue(void *args_p);