diff --git a/specification/stage-3/06_Connection_Control/asn1/Uu-6G-ConnectionControl.asn b/specification/stage-3/06_Connection_Control/asn1/Uu-6G-ConnectionControl.asn
new file mode 100644
index 0000000000000000000000000000000000000000..102ee1ecf8e9c5ca152893e33a308c743163b09b
--- /dev/null
+++ b/specification/stage-3/06_Connection_Control/asn1/Uu-6G-ConnectionControl.asn
@@ -0,0 +1,27 @@
+Uu-6G-ConnectionControl
+DEFINITIONS
+    AUTOMATIC TAGS ::=
+BEGIN
+
+ConnectionSetupRequest ::= SEQUENCE {
+    /* If upper layers provide a 5G-S-TMSI, the UE shall set this field to the ng-5G-S-TMSI-Part1 (note: upper layers provide the 5G-S-TMSI if the UE is registered in the TA of the current cell.). Else, the UE shall set the field to a uniformly drawn random value in the range 0..549755813887. */
+    ue-Identity InitialUE-Identity,
+
+    /* If the UE establishmes the RRC connection as a result of release with redirect with mpsPriorityIndication, it shall set this field to "mps-PriorityAccess". Else, the UE shall set the field in accordance with the information received from upper layers.
+    NOTE: The network does not reject an RRCSetupRequest if the UE chooses a cause value that is unknown to the network. */
+    establishmentCause EstablishmentCause,
+
+    spare BIT STRING (SIZE (1))
+}
+
+InitialUE-Identity ::= CHOICE {
+    /* The rightmost 39 bits of 5G-S-TMSI. */
+    ng-5G-S-TMSI-Part1 BIT STRING (SIZE (39)),
+
+    randomValue INTEGER(0..549755813887)
+}
+
+EstablishmentCause ::= ENUMERATED {
+    emergency, highPriorityAccess, mt-Access, mo-Signalling, mo-Data, mo-VoiceCall, mo-VideoCall, mo-SMS, mps-PriorityAccess, mcs-PriorityAccess, spare6, spare5, spare4, spare3, spare2, spare1}
+
+END
\ No newline at end of file