Add api for ImsStack to trigger EPS fallback procedure. (1f74a417) · Commits · e / os / android_frameworks_base

telephony/java/android/telephony/ims/aidl/IImsMmTelListener.aidl

+1 −0

Original line number	Diff line number	Diff line
		@@ -35,4 +35,5 @@ interface IImsMmTelListener {
		void onRejectedCall(in ImsCallProfile callProfile, in ImsReasonInfo reason);
		oneway void onVoiceMessageCountUpdate(int count);
		oneway void onAudioModeIsVoipChanged(int imsAudioHandler);
		oneway void onTriggerEpsFallback(int reason);
		}

telephony/java/android/telephony/ims/feature/MmTelFeature.java

+71 −0

Original line number	Diff line number	Diff line
		@@ -590,6 +590,17 @@ public class MmTelFeature extends ImsFeature {
		public void onAudioModeIsVoipChanged(int imsAudioHandler) {

		}

		/**
		* Called when the IMS triggers EPS fallback procedure.
		*
		* @param reason specifies the reason that causes EPS fallback.
		* @hide
		*/
		@Override
		public void onTriggerEpsFallback(@EpsFallbackReason int reason) {

		}
		}

		/**
		@@ -662,6 +673,48 @@ public class MmTelFeature extends ImsFeature {
		@SystemApi
		public static final int AUDIO_HANDLER_BASEBAND = 1;

		/** @hide */
		@Retention(RetentionPolicy.SOURCE)
		@IntDef(
		prefix = "EPS_FALLBACK_REASON_",
		value = {
		EPS_FALLBACK_REASON_INVALID,
		EPS_FALLBACK_REASON_NO_NETWORK_TRIGGER,
		EPS_FALLBACK_REASON_NO_NETWORK_RESPONSE,
		})
		public @interface EpsFallbackReason {}

		/**
		* Default value. Internal use only.
		* This value should not be used to trigger EPS fallback.
		* @hide
		*/
		public static final int EPS_FALLBACK_REASON_INVALID = -1;

		/**
		* If the network only supports the EPS fallback in 5G NR SA for voice calling and the EPS
		* Fallback procedure by the network during the call setup is not triggered, UE initiated
		* fallback will be triggered with this reason. The modem shall locally release the 5G NR
		* SA RRC connection and acquire the LTE network and perform a tracking area update
		* procedure. After the EPS fallback procedure is completed, the call setup for voice will
		* be established if there is no problem.
		*
		* @hide
		*/
		public static final int EPS_FALLBACK_REASON_NO_NETWORK_TRIGGER = 1;

		/**
		* If the UE doesn't receive any response for SIP INVITE within a certain timeout in 5G NR
		* SA for MO voice calling, the device determines that voice call is not available in 5G and
		* terminates all active SIP dialogs and SIP requests and enters IMS non-registered state.
		* In that case, UE initiated fallback will be triggered with this reason. The modem shall
		* reset modem's data buffer of IMS PDU to prevent the ghost call. After the EPS fallback
		* procedure is completed, VoLTE call could be tried if there is no problem.
		*
		* @hide
		*/
		public static final int EPS_FALLBACK_REASON_NO_NETWORK_RESPONSE = 2;

		private IImsMmTelListener mListener;

		/**
		@@ -829,6 +882,24 @@ public class MmTelFeature extends ImsFeature {
		}
		}

		/**
		* Triggers the EPS fallback procedure.
		*
		* @param reason specifies the reason that causes EPS fallback.
		* @hide
		*/
		public final void triggerEpsFallback(@EpsFallbackReason int reason) {
		IImsMmTelListener listener = getListener();
		if (listener == null) {
		throw new IllegalStateException("Session is not available.");
		}
		try {
		listener.onTriggerEpsFallback(reason);
		} catch (RemoteException e) {
		throw new RuntimeException(e);
		}
		}

		/**
		* Provides the MmTelFeature with the ability to return the framework Capability Configuration
		* for a provided Capability. If the framework calls {@link #changeEnabledCapabilities} and