RRC developments

src/gnb/rrc/broadcast.cpp

+//
+// This file is a part of UERANSIM open source project.
+// Copyright (c) 2021 ALİ GÜNGÖR.
+//
+// The software and all associated files are licensed under GPL-3.0
+// and subject to the terms and conditions defined in LICENSE file.
+//
+
+
+#include "task.hpp"
+
+#include <gnb/ngap/task.hpp>
+#include <lib/rrc/encode.hpp>
+
+namespace nr::gnb
+{
+
+void GnbRrcTask::onBroadcastTimerExpired()
+{
+    triggerSysInfoBroadcast();
+}
+
+void GnbRrcTask::triggerSysInfoBroadcast()
+{
+    // TODO
+}
+
+} // namespace nr::gnb
\ No newline at end of file

src/gnb/rrc/task.cpp

@@ -15,6 +15,9 @@
 #include <asn/rrc/ASN_RRC_DLInformationTransfer-IEs.h>
 #include <asn/rrc/ASN_RRC_DLInformationTransfer.h>
 
+static constexpr const int TIMER_ID_SI_BROADCAST = 1;
+static constexpr const int TIMER_PERIOD_SI_BROADCAST = 5000;
+
 namespace nr::gnb
 {
 
@@ -25,6 +28,7 @@ GnbRrcTask::GnbRrcTask(TaskBase *base) : m_base{base}, m_ueCtx{}, m_tidCounter{}
 
 void GnbRrcTask::onStart()
 {
+    setTimer(TIMER_ID_SI_BROADCAST, TIMER_PERIOD_SI_BROADCAST);
 }
 
 void GnbRrcTask::onQuit()
@@ -77,6 +81,15 @@ void GnbRrcTask::onLoop()
         }
         break;
     }
+    case NtsMessageType::TIMER_EXPIRED: {
+        auto *w = dynamic_cast<NwTimerExpired *>(msg);
+        if (w->timerId == TIMER_ID_SI_BROADCAST)
+        {
+            setTimer(TIMER_ID_SI_BROADCAST, TIMER_PERIOD_SI_BROADCAST);
+            onBroadcastTimerExpired();
+        }
+        break;
+    }
     default:
         m_logger->unhandledNts(msg);
         break;

src/gnb/rrc/task.hpp

@@ -90,6 +90,10 @@ class GnbRrcTask : public NtsTask
     void receiveRrcMessage(int ueId, ASN_RRC_UL_CCCH_Message *msg);
     void receiveRrcMessage(int ueId, ASN_RRC_UL_CCCH1_Message *msg);
     void receiveRrcMessage(int ueId, ASN_RRC_UL_DCCH_Message *msg);
+
+    /* System Information Broadcast related */
+    void onBroadcastTimerExpired();
+    void triggerSysInfoBroadcast();
 };
 
 } // namespace nr::gnb