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/* * Copyright (C) 2012 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 android.telephony; import android.annotation.IntRange; import android.annotation.UnsupportedAppUsage; import android.os.Parcel; import android.os.Parcelable; import android.os.PersistableBundle; import java.util.Arrays; import java.util.Objects; /** * LTE signal strength related information. */ public final class CellSignalStrengthLte extends CellSignalStrength implements Parcelable { private static final String LOG_TAG = "CellSignalStrengthLte"; private static final boolean DBG = false; /** * Indicates the unknown or undetectable RSSI value in ASU. * * Reference: TS 27.007 8.5 - Signal quality +CSQ */ private static final int SIGNAL_STRENGTH_LTE_RSSI_ASU_UNKNOWN = 99; /** * Indicates the maximum valid RSSI value in ASU. * * Reference: TS 27.007 8.5 - Signal quality +CSQ */ private static final int SIGNAL_STRENGTH_LTE_RSSI_VALID_ASU_MAX_VALUE = 31; /** * Indicates the minimum valid RSSI value in ASU. * * Reference: TS 27.007 8.5 - Signal quality +CSQ */ private static final int SIGNAL_STRENGTH_LTE_RSSI_VALID_ASU_MIN_VALUE = 0; private static final int MAX_LTE_RSRP = -44; private static final int MIN_LTE_RSRP = -140; @UnsupportedAppUsage(maxTargetSdk = android.os.Build.VERSION_CODES.P) private int mSignalStrength; // To be removed private int mRssi; @UnsupportedAppUsage(maxTargetSdk = android.os.Build.VERSION_CODES.P) private int mRsrp; @UnsupportedAppUsage(maxTargetSdk = android.os.Build.VERSION_CODES.P) private int mRsrq; @UnsupportedAppUsage(maxTargetSdk = android.os.Build.VERSION_CODES.P) private int mRssnr; @UnsupportedAppUsage(maxTargetSdk = android.os.Build.VERSION_CODES.P) private int mCqi; @UnsupportedAppUsage(maxTargetSdk = android.os.Build.VERSION_CODES.P) private int mTimingAdvance; private int mLevel; /** @hide */ @UnsupportedAppUsage public CellSignalStrengthLte() { setDefaultValues(); } /** * Construct a cell signal strength * * @param rssi in dBm [-113,-51], UNKNOWN * @param rsrp in dBm [-140,-43], UNKNOWN * @param rsrq in dB [-20,-3], UNKNOWN * @param rssnr in 10*dB [-200, +300], UNKNOWN * @param cqi [0, 15], UNKNOWN * @param timingAdvance [0, 1282], UNKNOWN * */ /** @hide */ public CellSignalStrengthLte(int rssi, int rsrp, int rsrq, int rssnr, int cqi, int timingAdvance) { mRssi = inRangeOrUnavailable(rssi, -113, -51); mSignalStrength = mRssi; mRsrp = inRangeOrUnavailable(rsrp, -140, -43); mRsrq = inRangeOrUnavailable(rsrq, -20, -3); mRssnr = inRangeOrUnavailable(rssnr, -200, 300); mCqi = inRangeOrUnavailable(cqi, 0, 15); mTimingAdvance = inRangeOrUnavailable(timingAdvance, 0, 1282); updateLevel(null, null); } /** @hide */ public CellSignalStrengthLte(android.hardware.radio.V1_0.LteSignalStrength lte) { // Convert from HAL values as part of construction. this(convertRssiAsuToDBm(lte.signalStrength), lte.rsrp != CellInfo.UNAVAILABLE ? -lte.rsrp : lte.rsrp, lte.rsrq != CellInfo.UNAVAILABLE ? -lte.rsrq : lte.rsrq, lte.rssnr, lte.cqi, lte.timingAdvance); } /** @hide */ public CellSignalStrengthLte(CellSignalStrengthLte s) { copyFrom(s); } /** @hide */ protected void copyFrom(CellSignalStrengthLte s) { mSignalStrength = s.mSignalStrength; mRssi = s.mRssi; mRsrp = s.mRsrp; mRsrq = s.mRsrq; mRssnr = s.mRssnr; mCqi = s.mCqi; mTimingAdvance = s.mTimingAdvance; mLevel = s.mLevel; } /** @hide */ @Override public CellSignalStrengthLte copy() { return new CellSignalStrengthLte(this); } /** @hide */ @Override public void setDefaultValues() { mSignalStrength = CellInfo.UNAVAILABLE; mRssi = CellInfo.UNAVAILABLE; mRsrp = CellInfo.UNAVAILABLE; mRsrq = CellInfo.UNAVAILABLE; mRssnr = CellInfo.UNAVAILABLE; mCqi = CellInfo.UNAVAILABLE; mTimingAdvance = CellInfo.UNAVAILABLE; mLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN; } /** {@inheritDoc} */ @Override @IntRange(from = SIGNAL_STRENGTH_NONE_OR_UNKNOWN, to = SIGNAL_STRENGTH_GREAT) public int getLevel() { return mLevel; } // Lifted from Default carrier configs and max range of RSRP private static final int[] sThresholds = new int[] { -115, -105, -95, -85 }; private static final int sRsrpBoost = 0; /** @hide */ @Override public void updateLevel(PersistableBundle cc, ServiceState ss) { int[] thresholds; boolean rsrpOnly; if (cc == null) { thresholds = sThresholds; rsrpOnly = false; } else { rsrpOnly = cc.getBoolean(CarrierConfigManager.KEY_USE_ONLY_RSRP_FOR_LTE_SIGNAL_BAR_BOOL, false); thresholds = cc.getIntArray(CarrierConfigManager.KEY_LTE_RSRP_THRESHOLDS_INT_ARRAY); if (thresholds == null) thresholds = sThresholds; if (DBG) log("updateLevel() carrierconfig - rsrpOnly=" + rsrpOnly + ", thresholds=" + Arrays.toString(thresholds)); } int rsrpBoost = 0; if (ss != null) { rsrpBoost = ss.getLteEarfcnRsrpBoost(); } int rssiIconLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN; int rsrpIconLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN; int snrIconLevel = -1; int rsrp = mRsrp + rsrpBoost; if (rsrp < MIN_LTE_RSRP || rsrp > MAX_LTE_RSRP) { rsrpIconLevel = -1; } else { rsrpIconLevel = thresholds.length; while (rsrpIconLevel > 0 && rsrp < thresholds[rsrpIconLevel - 1]) rsrpIconLevel--; } if (rsrpOnly) { if (DBG) log("updateLevel() - rsrp = " + rsrpIconLevel); if (rsrpIconLevel != -1) { mLevel = rsrpIconLevel; return; } } /* * Values are -200 dB to +300 (SNR*10dB) RS_SNR >= 13.0 dB =>4 bars 4.5 * dB <= RS_SNR < 13.0 dB => 3 bars 1.0 dB <= RS_SNR < 4.5 dB => 2 bars * -3.0 dB <= RS_SNR < 1.0 dB 1 bar RS_SNR < -3.0 dB/No Service Antenna * Icon Only */ if (mRssnr > 300) snrIconLevel = -1; else if (mRssnr >= 130) snrIconLevel = SIGNAL_STRENGTH_GREAT; else if (mRssnr >= 45) snrIconLevel = SIGNAL_STRENGTH_GOOD; else if (mRssnr >= 10) snrIconLevel = SIGNAL_STRENGTH_MODERATE; else if (mRssnr >= -30) snrIconLevel = SIGNAL_STRENGTH_POOR; else if (mRssnr >= -200) snrIconLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN; if (DBG) log("updateLevel() - rsrp:" + mRsrp + " snr:" + mRssnr + " rsrpIconLevel:" + rsrpIconLevel + " snrIconLevel:" + snrIconLevel + " lteRsrpBoost:" + sRsrpBoost); /* Choose a measurement type to use for notification */ if (snrIconLevel != -1 && rsrpIconLevel != -1) { /* * The number of bars displayed shall be the smaller of the bars * associated with LTE RSRP and the bars associated with the LTE * RS_SNR */ mLevel = (rsrpIconLevel < snrIconLevel ? rsrpIconLevel : snrIconLevel); return; } if (snrIconLevel != -1) { mLevel = snrIconLevel; return; } if (rsrpIconLevel != -1) { mLevel = rsrpIconLevel; return; } if (mRssi > -51) rssiIconLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN; else if (mRssi >= -89) rssiIconLevel = SIGNAL_STRENGTH_GREAT; else if (mRssi >= -97) rssiIconLevel = SIGNAL_STRENGTH_GOOD; else if (mRssi >= -103) rssiIconLevel = SIGNAL_STRENGTH_MODERATE; else if (mRssi >= -113) rssiIconLevel = SIGNAL_STRENGTH_POOR; else rssiIconLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN; if (DBG) log("getLteLevel - rssi:" + mRssi + " rssiIconLevel:" + rssiIconLevel); mLevel = rssiIconLevel; } /** * Get reference signal received quality * * @return the RSRQ if available or * {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable. */ public int getRsrq() { return mRsrq; } /** * Get Received Signal Strength Indication (RSSI) in dBm * * The value range is [-113, -51] inclusively or {@link CellInfo#UNAVAILABLE} if unavailable. * * Reference: TS 27.007 8.5 Signal quality +CSQ * * @return the RSSI if available or {@link CellInfo#UNAVAILABLE} if unavailable. */ public int getRssi() { return mRssi; } /** * Get reference signal signal-to-noise ratio * * @return the RSSNR if available or * {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable. */ public int getRssnr() { return mRssnr; } /** * Get reference signal received power in dBm * * @return the RSRP of the measured cell. */ public int getRsrp() { return mRsrp; } /** * Get channel quality indicator * * @return the CQI if available or * {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable. */ public int getCqi() { return mCqi; } /** * Get signal strength in dBm * * @return the RSRP of the measured cell. */ @Override public int getDbm() { return mRsrp; } /** * Get the RSRP in ASU. * * Asu is calculated based on 3GPP RSRP. Refer to 3GPP 27.007 (Ver 10.3.0) Sec 8.69 * * @return RSCP in ASU 0..97, 255, or UNAVAILABLE */ @Override public int getAsuLevel() { int lteAsuLevel = 99; int lteDbm = mRsrp; if (lteDbm == CellInfo.UNAVAILABLE) lteAsuLevel = 99; else if (lteDbm <= -140) lteAsuLevel = 0; else if (lteDbm >= -43) lteAsuLevel = 97; else lteAsuLevel = lteDbm + 140; if (DBG) log("Lte Asu level: " + lteAsuLevel); return lteAsuLevel; } /** * Get the timing advance value for LTE, as a value in range of 0..1282. * {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} is reported when there is no * active RRC connection. Refer to 3GPP 36.213 Sec 4.2.3 * * @return the LTE timing advance if available or * {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable. */ public int getTimingAdvance() { return mTimingAdvance; } @Override public int hashCode() { return Objects.hash(mRssi, mRsrp, mRsrq, mRssnr, mCqi, mTimingAdvance, mLevel); } private static final CellSignalStrengthLte sInvalid = new CellSignalStrengthLte(); /** @hide */ @Override public boolean isValid() { return !this.equals(sInvalid); } @Override public boolean equals(Object o) { CellSignalStrengthLte s; if (!(o instanceof CellSignalStrengthLte)) return false; s = (CellSignalStrengthLte) o; return mRssi == s.mRssi && mRsrp == s.mRsrp && mRsrq == s.mRsrq && mRssnr == s.mRssnr && mCqi == s.mCqi && mTimingAdvance == s.mTimingAdvance && mLevel == s.mLevel; } /** * @return string representation. */ @Override public String toString() { return "CellSignalStrengthLte:" + " rssi=" + mRssi + " rsrp=" + mRsrp + " rsrq=" + mRsrq + " rssnr=" + mRssnr + " cqi=" + mCqi + " ta=" + mTimingAdvance + " level=" + mLevel; } /** Implement the Parcelable interface */ @Override public void writeToParcel(Parcel dest, int flags) { if (DBG) log("writeToParcel(Parcel, int): " + toString()); dest.writeInt(mRssi); // Need to multiply rsrp and rsrq by -1 // to ensure consistency when reading values written here // unless the values are invalid dest.writeInt(mRsrp); dest.writeInt(mRsrq); dest.writeInt(mRssnr); dest.writeInt(mCqi); dest.writeInt(mTimingAdvance); dest.writeInt(mLevel); } /** * Construct a SignalStrength object from the given parcel * where the token is already been processed. */ private CellSignalStrengthLte(Parcel in) { mRssi = in.readInt(); mSignalStrength = mRssi; mRsrp = in.readInt(); mRsrq = in.readInt(); mRssnr = in.readInt(); mCqi = in.readInt(); mTimingAdvance = in.readInt(); mLevel = in.readInt(); if (DBG) log("CellSignalStrengthLte(Parcel): " + toString()); } /** Implement the Parcelable interface */ @Override public int describeContents() { return 0; } /** Implement the Parcelable interface */ @SuppressWarnings("hiding") public static final Parcelable.Creator<CellSignalStrengthLte> CREATOR = new Parcelable.Creator<CellSignalStrengthLte>() { @Override public CellSignalStrengthLte createFromParcel(Parcel in) { return new CellSignalStrengthLte(in); } @Override public CellSignalStrengthLte[] newArray(int size) { return new CellSignalStrengthLte[size]; } }; /** * log */ private static void log(String s) { Rlog.w(LOG_TAG, s); } private static int convertRssiAsuToDBm(int rssiAsu) { if (rssiAsu == SIGNAL_STRENGTH_LTE_RSSI_ASU_UNKNOWN) { return CellInfo.UNAVAILABLE; } if ((rssiAsu < SIGNAL_STRENGTH_LTE_RSSI_VALID_ASU_MIN_VALUE || rssiAsu > SIGNAL_STRENGTH_LTE_RSSI_VALID_ASU_MAX_VALUE)) { Rlog.e(LOG_TAG, "convertRssiAsuToDBm: invalid RSSI in ASU=" + rssiAsu); return CellInfo.UNAVAILABLE; } return -113 + (2 * rssiAsu); } }