Delay IMS teardown during SRVCC handover (0b0938cc) · Commits · e / os / android_frameworks_opt_telephony

src/java/com/android/internal/telephony/data/DataEvaluation.java

+2 −0

Original line number	Diff line number	Diff line
		@@ -230,6 +230,8 @@ public class DataEvaluation {
		PREFERRED_TRANSPORT_CHANGED(true),
		/** Slice config changed. */
		SLICE_CONFIG_CHANGED(true),
		/** SRVCC state changed. */
		SRVCC_STATE_CHANGED(true),
		/**
		* Single data network arbitration. On certain RATs, only one data network is allowed at the
		* same time.

src/java/com/android/internal/telephony/data/DataNetwork.java

+1 −12

Original line number	Diff line number	Diff line
		@@ -1338,17 +1338,6 @@ public class DataNetwork extends StateMachine {
		}

		int tearDownReason = msg.arg1;
		// If the tear down request is from upper layer, for example, IMS service
		// releases network request, we don't need to delay. The purpose of the delay
		// is to have IMS service have time to perform IMS de-registration, so if this
		// request is from IMS service itself, that means IMS service is already aware
		// of the tear down. So there is no need to delay in this case.
		if (tearDownReason != TEAR_DOWN_REASON_CONNECTIVITY_SERVICE_UNWANTED
		&& shouldDelayImsTearDown()) {
		logl("Delay IMS tear down until call ends. reason="
		+ tearDownReasonToString(tearDownReason));
		break;
		}

		removeMessages(EVENT_TEAR_DOWN_NETWORK);
		removeDeferredMessages(EVENT_TEAR_DOWN_NETWORK);
		@@ -2607,7 +2596,7 @@ public class DataNetwork extends StateMachine {
		* @return {@code true} if this is an IMS network and tear down should be delayed until call
		* ends on this data network.
		*/
		public boolean shouldDelayImsTearDown() {
		public boolean shouldDelayImsTearDownDueToInCall() {
		return mDataConfigManager.isImsDelayTearDownEnabled()
		&& mNetworkCapabilities != null
		&& mNetworkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_MMTEL)

src/java/com/android/internal/telephony/data/DataNetworkController.java

+42 −4

Original line number	Diff line number	Diff line
		@@ -141,6 +141,9 @@ public class DataNetworkController extends Handler {
		/** Event for removing a network request. */
		private static final int EVENT_REMOVE_NETWORK_REQUEST = 3;

		/** Event for SRVCC state changed. */
		private static final int EVENT_SRVCC_STATE_CHANGED = 4;

		/** Re-evaluate all unsatisfied network requests. */
		private static final int EVENT_REEVALUATE_UNSATISFIED_NETWORK_REQUESTS = 5;

		@@ -311,6 +314,9 @@ public class DataNetworkController extends Handler {
		/** Indicates if NR advanced is allowed by PCO. */
		private boolean mNrAdvancedCapableByPco = false;

		/** Indicates if srvcc is going on. */
		private boolean mIsSrvccHandoverInProcess = false;

		/**
		* Indicates if the data services are bound. Key if the transport type, and value is the boolean
		* indicating service is bound or not.
		@@ -910,7 +916,7 @@ public class DataNetworkController extends Handler {
		preferredTransport));
		return;
		}
		if (dataNetwork.shouldDelayImsTearDown()) {
		if (dataNetwork.shouldDelayImsTearDownDueToInCall()) {
		log("onDataNetworkHandoverRetryStopped: Delay IMS tear down until call "
		+ "ends. " + dataNetwork);
		return;
		@@ -1025,6 +1031,7 @@ public class DataNetworkController extends Handler {
		this, EVENT_VOICE_CALL_ENDED, null);
		}
		mPhone.mCi.registerForSlicingConfigChanged(this, EVENT_SLICE_CONFIG_CHANGED, null);
		mPhone.mCi.registerForSrvccStateChanged(this, EVENT_SRVCC_STATE_CHANGED, null);

		mPhone.getLinkBandwidthEstimator().registerCallback(
		new LinkBandwidthEstimatorCallback(this::post) {
		@@ -1038,6 +1045,7 @@ public class DataNetworkController extends Handler {

		@Override
		public void handleMessage(@NonNull Message msg) {
		AsyncResult ar;
		switch (msg.what) {
		case EVENT_REGISTER_ALL_EVENTS:
		onRegisterAllEvents();
		@@ -1072,6 +1080,12 @@ public class DataNetworkController extends Handler {
		sendMessage(obtainMessage(EVENT_REEVALUATE_UNSATISFIED_NETWORK_REQUESTS,
		DataEvaluationReason.SLICE_CONFIG_CHANGED));
		break;
		case EVENT_SRVCC_STATE_CHANGED:
		ar = (AsyncResult) msg.obj;
		if (ar.exception == null) {
		onSrvccStateChanged((int[]) ar.result);
		}
		break;
		case EVENT_PS_RESTRICT_ENABLED:
		mPsRestricted = true;
		break;
		@@ -1088,7 +1102,7 @@ public class DataNetworkController extends Handler {
		REEVALUATE_UNSATISFIED_NETWORK_REQUESTS_TAC_CHANGED_DELAY_MILLIS);
		break;
		case EVENT_DATA_SERVICE_BINDING_CHANGED:
		AsyncResult ar = (AsyncResult) msg.obj;
		ar = (AsyncResult) msg.obj;
		int transport = (int) ar.userObj;
		boolean bound = (boolean) ar.result;
		onDataServiceBindingChanged(transport, bound);
		@@ -1750,13 +1764,15 @@ public class DataNetworkController extends Handler {
		}
		}

		boolean isMmtel = false;
		// If the data network is IMS that supports voice call, and has MMTEL request (client
		// specified VoPS is required.)
		if (dataNetwork.getAttachedNetworkRequestList().get(
		new int[]{NetworkCapabilities.NET_CAPABILITY_MMTEL}) != null) {
		// When reaching here, it means the network supports MMTEL, and also has MMTEL request
		// attached to it.
		if (!dataNetwork.shouldDelayImsTearDown()) {
		isMmtel = true;
		if (!dataNetwork.shouldDelayImsTearDownDueToInCall()) {
		if (dataNetwork.getTransport() == AccessNetworkConstants.TRANSPORT_TYPE_WWAN) {
		NetworkRegistrationInfo nri = mServiceState.getNetworkRegistrationInfo(
		NetworkRegistrationInfo.DOMAIN_PS,
		@@ -1803,7 +1819,9 @@ public class DataNetworkController extends Handler {
		// Sometimes network temporarily OOS and network type becomes UNKNOWN. We don't
		// tear down network in that case.
		if (networkType != TelephonyManager.NETWORK_TYPE_UNKNOWN
		&& !dataProfile.getApnSetting().canSupportLingeringNetworkType(networkType)) {
		&& !dataProfile.getApnSetting().canSupportLingeringNetworkType(networkType)
		// delay IMS tear down if SRVCC in progress
		&& !(isMmtel && mIsSrvccHandoverInProcess)) {
		log("networkType=" + TelephonyManager.getNetworkTypeName(networkType)
		+ ", networkTypeBitmask="
		+ TelephonyManager.convertNetworkTypeBitmaskToString(
		@@ -2993,6 +3011,25 @@ public class DataNetworkController extends Handler {
		DataNetwork.TEAR_DOWN_REASON_DATA_STALL));
		}

		/**
		* Called when SRVCC handover state changes. To preserve the voice call, we don't tear down the
		* IMS network while handover in process. We reevaluate the network when handover ends.
		*
		* @param state The handover state of SRVCC
		*/
		private void onSrvccStateChanged(@NonNull int[] state) {
		if (state != null && state.length != 0) {
		log("onSrvccStateChanged: " + TelephonyManager.srvccStateToString(state[0]));
		mIsSrvccHandoverInProcess = state[0] == TelephonyManager.SRVCC_STATE_HANDOVER_STARTED;
		// Reevaluate networks if SRVCC ends.
		if (!mIsSrvccHandoverInProcess
		&& !hasMessages(EVENT_REEVALUATE_EXISTING_DATA_NETWORKS)) {
		sendMessage(obtainMessage(EVENT_REEVALUATE_EXISTING_DATA_NETWORKS,
		DataEvaluationReason.SRVCC_STATE_CHANGED));
		}
		}
		}

		/**
		* Called when data service binding changed.
		*
		@@ -3745,6 +3782,7 @@ public class DataNetworkController extends Handler {
		pw.println("mImsDataNetworkState="
		+ TelephonyUtils.dataStateToString(mImsDataNetworkState));
		pw.println("mDataServiceBound=" + mDataServiceBound);
		pw.println("mIsSrvccHandoverInProcess=" + mIsSrvccHandoverInProcess);
		pw.println("mSimState=" + TelephonyManager.simStateToString(mSimState));
		pw.println("mDataNetworkControllerCallbacks=" + mDataNetworkControllerCallbacks);
		pw.println("Subscription plans:");

tests/telephonytests/src/com/android/internal/telephony/data/DataNetworkControllerTest.java

+27 −0

Original line number	Diff line number	Diff line
		@@ -3140,6 +3140,33 @@ public class DataNetworkControllerTest extends TelephonyTest {
		verifyAllDataDisconnected();
		}

		@Test
		public void testDelayImsTearDownDuringSrvcc() throws Exception {
		testSetupImsDataNetwork();
		// SRVCC in progress, delay tear down
		mDataNetworkControllerUT.obtainMessage(4 /EVENT_SRVCC_STATE_CHANGED/,
		new AsyncResult(null,
		new int[]{TelephonyManager.SRVCC_STATE_HANDOVER_STARTED}, null))
		.sendToTarget();
		serviceStateChanged(TelephonyManager.NETWORK_TYPE_HSPAP,
		NetworkRegistrationInfo.REGISTRATION_STATE_HOME);
		processAllMessages();

		// Make sure IMS network is still connected.
		verifyConnectedNetworkHasCapabilities(NetworkCapabilities.NET_CAPABILITY_IMS,
		NetworkCapabilities.NET_CAPABILITY_MMTEL);

		// SRVCC handover ends, tear down as normal
		mDataNetworkControllerUT.obtainMessage(4 /EVENT_SRVCC_STATE_CHANGED/,
		new AsyncResult(null,
		new int[]{TelephonyManager.SRVCC_STATE_HANDOVER_CANCELED}, null))
		.sendToTarget();
		processAllFutureMessages();

		// Make sure IMS network is torn down
		verifyNoConnectedNetworkHasCapability(NetworkCapabilities.NET_CAPABILITY_MMTEL);
		}

		@Test
		public void testUnmeteredMmsWhenDataDisabled() throws Exception {
		mCarrierConfig.putStringArray(