UAC Access category determination

src/ue/nas/mm/access.cpp

@@ -126,4 +126,59 @@ std::bitset<16> NasMm::determineAccessIdentities()
     return ais;
 }
 
+int NasMm::determineAccessCategory()
+{
+    /* Check for Rule #1 */
+    if (m_procCtl.mobilityRegistration)
+    {
+        if (m_procCtl.mobilityRegistration == ERegUpdateCause::PAGING_OR_NOTIFICATION)
+        {
+            return 0;
+        }
+    }
+
+    if (m_procCtl.serviceRequest)
+    {
+        if (m_procCtl.serviceRequest == EServiceReqCause::IDLE_PAGING ||
+            m_procCtl.serviceRequest == EServiceReqCause::CONNECTED_3GPP_NOTIFICATION_N3GPP ||
+            m_procCtl.serviceRequest == EServiceReqCause::IDLE_3GPP_NOTIFICATION_N3GPP)
+        {
+            return 0;
+        }
+    }
+
+    /* Check for Rule #2 */
+    if (hasEmergency())
+        return 2;
+
+    /* Check for Rule #3 */
+    // TODO: Operator defined access category not supported
+
+    /* Check for Rule #4 */
+    // TODO: Access attempt for delay tolerant service
+
+    /* Check for Rule #5 */
+    // TODO: MO MMTel voice call
+
+    /* Check for Rule #6 */
+    // TODO: MO MMTel video call
+
+    /* Check for Rule #7 */
+    // TODO: MO SMS over NAS or MO SMSoIP
+
+    /* Check for Rule #8 */
+    if (hasPendingProcedure() && !m_sm->anyUplinkDataPending())
+        return 3;
+
+    /* Check for Rule #9 */
+    if (hasPendingProcedure() && m_sm->anyUplinkDataPending())
+        return 7;
+
+    /* Check for Rule #10 */
+    if (m_sm->anyUplinkDataPending())
+        return 7;
+
+    return 0;
+}
+
 } // namespace nr::ue

src/ue/nas/mm/mm.hpp

@@ -175,6 +175,7 @@ class NasMm
     void setN1Capability(bool enabled);
     bool isInNonAllowedArea();
     std::bitset<16> determineAccessIdentities();
+    int determineAccessCategory();
 
   private: /* eCall */
     bool startECallInactivityIfNeeded();