Merge "Add init version of LinkBandwidthEstimator" into sc-dev (5bd07bd5) · Commits · e / os / android_frameworks_opt_telephony

src/java/com/android/internal/telephony/GsmCdmaPhone.java

+5 −0

Original line number	Diff line number	Diff line
		@@ -89,6 +89,7 @@ import com.android.internal.telephony.cdma.CdmaMmiCode;
		import com.android.internal.telephony.cdma.CdmaSubscriptionSourceManager;
		import com.android.internal.telephony.dataconnection.DataEnabledSettings;
		import com.android.internal.telephony.dataconnection.DcTracker;
		import com.android.internal.telephony.dataconnection.LinkBandwidthEstimator;
		import com.android.internal.telephony.dataconnection.TransportManager;
		import com.android.internal.telephony.emergency.EmergencyNumberTracker;
		import com.android.internal.telephony.gsm.GsmMmiCode;
		@@ -323,6 +324,10 @@ public class GsmCdmaPhone extends Phone {
		SubscriptionController.getInstance().registerForUiccAppsEnabled(this,
		EVENT_UICC_APPS_ENABLEMENT_SETTING_CHANGED, null, false);

		mLinkBandwidthEstimator = mTelephonyComponentFactory
		.inject(LinkBandwidthEstimator.class.getName())
		.makeLinkBandwidthEstimator(this);

		loadTtyMode();

		CallManager.getInstance().registerPhone(this);

src/java/com/android/internal/telephony/Phone.java

+3 −0

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		@@ -78,6 +78,7 @@ import com.android.internal.annotations.VisibleForTesting;
		import com.android.internal.telephony.dataconnection.DataConnectionReasons;
		import com.android.internal.telephony.dataconnection.DataEnabledSettings;
		import com.android.internal.telephony.dataconnection.DcTracker;
		import com.android.internal.telephony.dataconnection.LinkBandwidthEstimator;
		import com.android.internal.telephony.dataconnection.TransportManager;
		import com.android.internal.telephony.emergency.EmergencyNumberTracker;
		import com.android.internal.telephony.imsphone.ImsPhoneCall;
		@@ -453,6 +454,8 @@ public abstract class Phone extends Handler implements PhoneInternalInterface {
		protected VoiceCallSessionStats mVoiceCallSessionStats;
		protected SmsStats mSmsStats;

		protected LinkBandwidthEstimator mLinkBandwidthEstimator;

		public IccRecords getIccRecords() {
		return mIccRecords.get();
		}

src/java/com/android/internal/telephony/TelephonyComponentFactory.java

+9 −0

Original line number	Diff line number	Diff line
		@@ -35,6 +35,7 @@ import com.android.internal.telephony.cdma.CdmaSubscriptionSourceManager;
		import com.android.internal.telephony.cdma.EriManager;
		import com.android.internal.telephony.dataconnection.DataEnabledSettings;
		import com.android.internal.telephony.dataconnection.DcTracker;
		import com.android.internal.telephony.dataconnection.LinkBandwidthEstimator;
		import com.android.internal.telephony.dataconnection.TransportManager;
		import com.android.internal.telephony.emergency.EmergencyNumberTracker;
		import com.android.internal.telephony.imsphone.ImsExternalCallTracker;
		@@ -69,6 +70,7 @@ public class TelephonyComponentFactory {
		private static final String TAG = TelephonyComponentFactory.class.getSimpleName();

		private static TelephonyComponentFactory sInstance;
		private final TelephonyFacade mTelephonyFacade = new TelephonyFacade();

		private InjectedComponents mInjectedComponents;

		@@ -447,4 +449,11 @@ public class TelephonyComponentFactory {
		SubscriptionController sc) {
		return new SubscriptionInfoUpdater(looper, context, sc);
		}

		/**
		* Create a new LinkBandwidthEstimator.
		*/
		public LinkBandwidthEstimator makeLinkBandwidthEstimator(Phone phone) {
		return new LinkBandwidthEstimator(phone, mTelephonyFacade);
		}
		}

src/java/com/android/internal/telephony/TelephonyFacade.java

0 → 100644

+48 −0

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		/*
		* Copyright (C) 2021 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package com.android.internal.telephony;

		import android.net.TrafficStats;
		import android.os.SystemClock;

		/**
		* This class is a wrapper of various static methods to simplify unit tests with static methods
		*/
		public class TelephonyFacade {
		/**
		* Returns milliseconds since boot, including time spent in sleep.
		*
		* @return Current time since boot in milliseconds.
		*/
		public long getElapsedSinceBootMillis() {
		return SystemClock.elapsedRealtime();
		}

		/**
		* Wrapper for {@link TrafficStats#getMobileTxBytes}.
		*/
		public long getMobileTxBytes() {
		return TrafficStats.getMobileTxBytes();
		}

		/**
		* Wrapper for {@link TrafficStats#getMobileRxBytes}.
		*/
		public long getMobileRxBytes() {
		return TrafficStats.getMobileRxBytes();
		}
		}

src/java/com/android/internal/telephony/dataconnection/LinkBandwidthEstimator.java

0 → 100644

+365 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2021 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package com.android.internal.telephony.dataconnection;

		import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;

		import android.annotation.NonNull;
		import android.content.Context;
		import android.hardware.display.DisplayManager;
		import android.net.ConnectivityManager;
		import android.net.Network;
		import android.net.NetworkCapabilities;
		import android.os.Handler;
		import android.os.HandlerExecutor;
		import android.os.Message;
		import android.os.OutcomeReceiver;
		import android.telephony.CellSignalStrength;
		import android.telephony.ModemActivityInfo;
		import android.telephony.PhoneStateListener;
		import android.telephony.SignalStrength;
		import android.telephony.TelephonyManager;
		import android.view.Display;

		import com.android.internal.annotations.VisibleForTesting;
		import com.android.internal.telephony.Phone;
		import com.android.internal.telephony.TelephonyFacade;
		import com.android.telephony.Rlog;

		import java.util.List;

		/**
		* Link Bandwidth Estimator based on the byte counts in TrafficStats and the time reported in modem
		* activity.
		*/
		public class LinkBandwidthEstimator extends Handler {
		private static final String TAG = LinkBandwidthEstimator.class.getSimpleName();
		private static final boolean DBG = false;
		@VisibleForTesting
		static final int MSG_SCREEN_STATE_CHANGED = 1;
		@VisibleForTesting
		static final int MSG_TRAFFIC_STATS_POLL = 2;
		@VisibleForTesting
		static final int MSG_MODEM_ACTIVITY_RETURNED = 3;
		@VisibleForTesting
		static final int MSG_DEFAULT_NETWORK_CHANGED = 4;
		private static final int MSG_SIGNAL_STRENGTH_CHANGED = 5;

		private static final int TRAFFIC_STATS_POLL_INTERVAL_MS = 1_000;
		private static final int MODEM_POLL_BYTE_DELTA_THR = 20_000;
		private static final int MODEM_POLL_BYTE_DELTA_ACC_THR = 500_000;
		private static final int MODEM_POLL_MIN_INTERVAL_MS = 5_000;
		private static final int MODEM_POLL_TIME_DELTA_MAX_MS = 15_000;
		private static final int TX_TIME_OVER_RX_TIME_RATIO_THR_NUM = 3;
		private static final int TX_TIME_OVER_RX_TIME_RATIO_THR_DEN = 2;

		private final Phone mPhone;
		private final TelephonyFacade mTelephonyFacade;
		private final TelephonyManager mTelephonyManager;
		private final ConnectivityManager mConnectivityManager;
		private boolean mScreenOn = false;
		private boolean mIsOnDefaultRoute = false;
		private long mLastModemPollTimeMs;

		private long mLastMobileTxBytes;
		private long mLastMobileRxBytes;
		private long mTxBytesDeltaAcc;
		private long mRxBytesDeltaAcc;
		private ModemActivityInfo mLastModemActivityInfo = null;
		private final PhoneStateListener mPhoneStateListener = new PhoneStateListenerImpl();
		private int mSignalStrengthDbm;
		private int mNetworkType;
		private NetworkCapabilities mNetworkCapabilities;
		private int mLinkBandwidthTxKps;
		private int mLinkBandwidthRxKps;

		private final DisplayManager.DisplayListener mDisplayListener =
		new DisplayManager.DisplayListener() {
		@Override
		public void onDisplayAdded(int displayId) { }

		@Override
		public void onDisplayRemoved(int displayId) { }

		@Override
		public void onDisplayChanged(int displayId) {
		obtainMessage(MSG_SCREEN_STATE_CHANGED, isScreenOn()).sendToTarget();
		}
		};

		private final OutcomeReceiver<ModemActivityInfo, TelephonyManager.ModemActivityInfoException>
		mOutcomeReceiver =
		new OutcomeReceiver<ModemActivityInfo, TelephonyManager.ModemActivityInfoException>() {
		@Override
		public void onResult(ModemActivityInfo result) {
		obtainMessage(MSG_MODEM_ACTIVITY_RETURNED, result).sendToTarget();
		}

		@Override
		public void onError(TelephonyManager.ModemActivityInfoException e) {
		Rlog.e(TAG, "error reading modem stats:" + e);
		obtainMessage(MSG_MODEM_ACTIVITY_RETURNED, null).sendToTarget();
		}
		};

		private final ConnectivityManager.NetworkCallback mDefaultNetworkCallback =
		new ConnectivityManager.NetworkCallback() {
		@Override
		public void onCapabilitiesChanged(@NonNull Network network,
		@NonNull NetworkCapabilities networkCapabilities) {
		obtainMessage(MSG_DEFAULT_NETWORK_CHANGED, networkCapabilities).sendToTarget();
		}

		public void onLost(@NonNull Network network) {
		obtainMessage(MSG_DEFAULT_NETWORK_CHANGED, null).sendToTarget();
		}
		};

		public LinkBandwidthEstimator(Phone phone, TelephonyFacade telephonyFacade) {
		mPhone = phone;
		mTelephonyFacade = telephonyFacade;
		mTelephonyManager = phone.getContext()
		.getSystemService(TelephonyManager.class)
		.createForSubscriptionId(phone.getSubId());
		mConnectivityManager = phone.getContext().getSystemService(ConnectivityManager.class);
		DisplayManager dm = (DisplayManager) phone.getContext().getSystemService(
		Context.DISPLAY_SERVICE);
		dm.registerDisplayListener(mDisplayListener, null);
		handleScreenStateChange(isScreenOn());
		mConnectivityManager.registerDefaultNetworkCallback(mDefaultNetworkCallback, this);
		mTelephonyManager.registerPhoneStateListener(new HandlerExecutor(this),
		mPhoneStateListener);
		}

		@Override
		public void handleMessage(Message msg) {
		switch (msg.what) {
		case MSG_SCREEN_STATE_CHANGED:
		handleScreenStateChange((boolean) msg.obj);
		break;
		case MSG_TRAFFIC_STATS_POLL:
		handleTrafficStatsPoll();
		break;
		case MSG_MODEM_ACTIVITY_RETURNED:
		handleModemActivityReturned((ModemActivityInfo) msg.obj);
		break;
		case MSG_DEFAULT_NETWORK_CHANGED:
		handleDefaultNetworkChanged((NetworkCapabilities) msg.obj);
		break;
		case MSG_SIGNAL_STRENGTH_CHANGED:
		handleSignalStrengthChange((SignalStrength) msg.obj);
		break;
		default:
		Rlog.e(TAG, "invalid message " + msg.what);
		break;
		}
		}

		/**
		* @return True if one the device's screen (e.g. main screen, wifi display, HDMI display etc...)
		* is on.
		*/
		private boolean isScreenOn() {
		// Note that we don't listen to Intent.SCREEN_ON and Intent.SCREEN_OFF because they are no
		// longer adequate for monitoring the screen state since they are not sent in cases where
		// the screen is turned off transiently such as due to the proximity sensor.
		final DisplayManager dm = (DisplayManager) mPhone.getContext().getSystemService(
		Context.DISPLAY_SERVICE);
		Display[] displays = dm.getDisplays();

		if (displays != null) {
		for (Display display : displays) {
		// Anything other than STATE_ON is treated as screen off, such as STATE_DOZE,
		// STATE_DOZE_SUSPEND, etc...
		if (display.getState() == Display.STATE_ON) {
		return true;
		}
		}
		return false;
		}

		return false;
		}

		private void handleScreenStateChange(boolean screenOn) {
		if (mScreenOn == screenOn) {
		return;
		}
		mScreenOn = screenOn;
		handleTrafficStatsPollConditionChanged();
		}

		private void handleDefaultNetworkChanged(NetworkCapabilities networkCapabilities) {
		mNetworkCapabilities = networkCapabilities;
		if (networkCapabilities == null) {
		mIsOnDefaultRoute = false;
		} else {
		mIsOnDefaultRoute = networkCapabilities.hasTransport(TRANSPORT_CELLULAR);
		}
		handleTrafficStatsPollConditionChanged();
		}

		private void handleTrafficStatsPollConditionChanged() {
		if (mScreenOn && mIsOnDefaultRoute) {
		handleTrafficStatsPoll();
		} else {
		removeMessages(MSG_TRAFFIC_STATS_POLL);
		}
		}

		private void handleTrafficStatsPoll() {
		long mobileTxBytes = mTelephonyFacade.getMobileTxBytes();
		long mobileRxBytes = mTelephonyFacade.getMobileRxBytes();
		long txBytesDelta = mobileTxBytes - mLastMobileTxBytes;
		long rxBytesDelta = mobileRxBytes - mLastMobileRxBytes;
		mLastMobileTxBytes = mobileTxBytes;
		mLastMobileRxBytes = mobileRxBytes;
		mTxBytesDeltaAcc += txBytesDelta;
		mRxBytesDeltaAcc += rxBytesDelta;
		logd("TxByteDelta " + txBytesDelta + " RxByteDelta " + rxBytesDelta);
		logd("TxByteDeltaAcc " + mTxBytesDeltaAcc + " RxByteDeltaAcc " + mRxBytesDeltaAcc);
		// Schedule the next traffic stats poll
		sendEmptyMessageDelayed(MSG_TRAFFIC_STATS_POLL, TRAFFIC_STATS_POLL_INTERVAL_MS);

		// Check it meets the requirement to request modem activity
		if (txBytesDelta < MODEM_POLL_BYTE_DELTA_THR && rxBytesDelta < MODEM_POLL_BYTE_DELTA_THR
		&& mTxBytesDeltaAcc < MODEM_POLL_BYTE_DELTA_ACC_THR
		&& mRxBytesDeltaAcc < MODEM_POLL_BYTE_DELTA_ACC_THR) {
		return;
		}

		long timeSinceLastModemPoll = mTelephonyFacade.getElapsedSinceBootMillis()
		- mLastModemPollTimeMs;
		if (timeSinceLastModemPoll < MODEM_POLL_MIN_INTERVAL_MS) {
		return;
		}
		makeRequestModemActivity();
		}

		private void makeRequestModemActivity() {
		logd("modem activity requested");
		mLastModemPollTimeMs = mTelephonyFacade.getElapsedSinceBootMillis();
		mTelephonyManager.requestModemActivityInfo(Runnable::run, mOutcomeReceiver);
		}

		private void handleModemActivityReturned(ModemActivityInfo result) {
		logd("modem activity returned");
		updateBandwidthEst(result);

		mLastModemActivityInfo = result;
		resetByteDeltaAcc();
		}

		private void resetByteDeltaAcc() {
		mTxBytesDeltaAcc = 0;
		mRxBytesDeltaAcc = 0;
		}

		private void updateBandwidthEst(ModemActivityInfo modemActivityInfo) {
		if (mLastModemActivityInfo == null \|\| modemActivityInfo == null
		\|\| mNetworkCapabilities == null) {
		return;
		}
		long lastTimeMs = mLastModemActivityInfo.getTimestampMillis();
		long currTimeMs = modemActivityInfo.getTimestampMillis();
		long timeDeltaMs = currTimeMs - lastTimeMs;

		if (timeDeltaMs > MODEM_POLL_TIME_DELTA_MAX_MS \|\| timeDeltaMs <= 0) {
		return;
		}
		ModemActivityInfo deltaInfo = mLastModemActivityInfo.getDelta(modemActivityInfo);
		long txTimeDeltaMs = getModemTxTimeMs(deltaInfo);
		long rxTimeDeltaMs = deltaInfo.getReceiveTimeMillis();
		long idleTimeDeltaMs = deltaInfo.getIdleTimeMillis();
		long sleepTimeDeltaMs = deltaInfo.getSleepTimeMillis();

		// Check if txTimeDeltaMs / rxTimeDeltaMs > TX_TIME_OVER_RX_TIME_RATIO_THR
		boolean isTxTimeOverRxTimeRatioLarge = (txTimeDeltaMs * TX_TIME_OVER_RX_TIME_RATIO_THR_DEN
		> rxTimeDeltaMs * TX_TIME_OVER_RX_TIME_RATIO_THR_NUM);
		long rxTimeBwEstMs = isTxTimeOverRxTimeRatioLarge
		? (txTimeDeltaMs + rxTimeDeltaMs) : rxTimeDeltaMs;
		mLinkBandwidthTxKps = (int) (txTimeDeltaMs <= 0 ? 0 : mTxBytesDeltaAcc * 8 * 1000
		/ txTimeDeltaMs / 1024);
		mLinkBandwidthRxKps = (int) (rxTimeBwEstMs <= 0 ? 0 : mRxBytesDeltaAcc * 8 * 1000
		/ rxTimeBwEstMs / 1024);

		int l2TxTputKbps = mNetworkCapabilities.getLinkUpstreamBandwidthKbps();
		int l2RxTputKbps = mNetworkCapabilities.getLinkDownstreamBandwidthKbps();

		StringBuilder sb = new StringBuilder();
		logd(sb.append("dBm, ").append(mSignalStrengthDbm)
		.append(", ").append(mNetworkType)
		.append(", L2 txRxKbps, ").append(l2TxTputKbps)
		.append(", ").append(l2RxTputKbps)
		.append(", txRxSleepIdleMs, ").append(txTimeDeltaMs)
		.append(", ").append(rxTimeDeltaMs)
		.append(", ").append(sleepTimeDeltaMs)
		.append(", ").append(idleTimeDeltaMs)
		.append(", txRxKB, ").append(mTxBytesDeltaAcc / 1000)
		.append(", ").append(mRxBytesDeltaAcc / 1000)
		.append(", L3 txRxKbps, ").append(mLinkBandwidthTxKps)
		.append(", ").append(mLinkBandwidthRxKps)
		.toString());
		}

		private long getModemTxTimeMs(ModemActivityInfo modemActivity) {
		long txTimeMs = 0;
		for (int lvl = 0; lvl < ModemActivityInfo.getNumTxPowerLevels(); lvl++) {
		txTimeMs += modemActivity.getTransmitDurationMillisAtPowerLevel(lvl);
		}
		return txTimeMs;
		}

		private void handleSignalStrengthChange(SignalStrength signalStrength) {
		List<CellSignalStrength> cssList =
		(signalStrength == null) ? null : signalStrength.getCellSignalStrengths();

		if (cssList == null \|\| cssList.isEmpty()) {
		return;
		}

		CellSignalStrength primaryCss = cssList.get(0);
		mSignalStrengthDbm = primaryCss.getDbm();
		mNetworkType = mTelephonyManager.getDataNetworkType();
		}

		private class PhoneStateListenerImpl extends PhoneStateListener
		implements PhoneStateListener.SignalStrengthsChangedListener {
		@Override
		public void onSignalStrengthsChanged(SignalStrength signalStrength) {
		obtainMessage(MSG_SIGNAL_STRENGTH_CHANGED, signalStrength).sendToTarget();
		}
		}

		/**
		* @return the latest Tx link bandwidth estimate in Kbps
		*/
		public int getTxLinkBandwidthKbps() {
		return mLinkBandwidthTxKps;
		}

		/**
		* @return the latest Rx link bandwidth estimate in Kbps
		*/
		public int getRxLinkBandwidthKbps() {
		return mLinkBandwidthRxKps;
		}

		void logd(String msg) {
		if (DBG) Rlog.d(TAG, msg);
		}
		}