src.android.telephony.CellSignalStrengthCdma Maven / Gradle / Ivy
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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.os.Parcel;
import android.os.Parcelable;
import android.os.PersistableBundle;
import com.android.telephony.Rlog;
import java.util.Objects;
/**
* Signal strength related information.
*/
public final class CellSignalStrengthCdma extends CellSignalStrength implements Parcelable {
private static final String LOG_TAG = "CellSignalStrengthCdma";
private static final boolean DBG = false;
private int mCdmaDbm; // This value is the RSSI value
private int mCdmaEcio; // This value is the Ec/Io
private int mEvdoDbm; // This value is the EVDO RSSI value
private int mEvdoEcio; // This value is the EVDO Ec/Io
private int mEvdoSnr; // Valid values are 0-8. 8 is the highest signal to noise ratio
private int mLevel;
/** @hide */
public CellSignalStrengthCdma() {
setDefaultValues();
}
/**
* SignalStrength constructor for input from the HAL.
*
* Note that values received from the HAL require coersion to be compatible here. All values
* reported through IRadio are the negative of the actual values (which results in a positive
* input to this method.
*
* Note that this HAL is inconsistent with UMTS-based radio techs as the value indicating
* that a field is unreported is negative, rather than a large(r) positive number.
*
Also note that to keep the public-facing methods of this class consistent with others,
* unreported values are coerced to {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE}
* rather than left as -1, which is a departure from SignalStrength, which is stuck with the
* values it currently reports.
*
* @param cdmaDbm CDMA signal strength value or CellInfo.UNAVAILABLE if invalid.
* @param cdmaEcio CDMA pilot/noise ratio or CellInfo.UNAVAILABLE if invalid.
* @param evdoDbm negative of the EvDO signal strength value or CellInfo.UNAVAILABLE if invalid.
* @param evdoEcio negative of the EvDO pilot/noise ratio or CellInfo.UNAVAILABLE if invalid.
* @param evdoSnr an SNR value 0..8 or CellInfo.UNVAILABLE if invalid.
* @hide
*/
public CellSignalStrengthCdma(int cdmaDbm, int cdmaEcio, int evdoDbm, int evdoEcio,
int evdoSnr) {
mCdmaDbm = inRangeOrUnavailable(cdmaDbm, -120, 0);
mCdmaEcio = inRangeOrUnavailable(cdmaEcio, -160, 0);
mEvdoDbm = inRangeOrUnavailable(evdoDbm, -120, 0);
mEvdoEcio = inRangeOrUnavailable(evdoEcio, -160, 0);
mEvdoSnr = inRangeOrUnavailable(evdoSnr, 0, 8);
updateLevel(null, null);
}
/** @hide */
public CellSignalStrengthCdma(android.hardware.radio.V1_0.CdmaSignalStrength cdma,
android.hardware.radio.V1_0.EvdoSignalStrength evdo) {
// Convert from HAL values as part of construction.
this(-cdma.dbm, -cdma.ecio, -evdo.dbm, -evdo.ecio, evdo.signalNoiseRatio);
}
/** @hide */
public CellSignalStrengthCdma(CellSignalStrengthCdma s) {
copyFrom(s);
}
/** @hide */
protected void copyFrom(CellSignalStrengthCdma s) {
mCdmaDbm = s.mCdmaDbm;
mCdmaEcio = s.mCdmaEcio;
mEvdoDbm = s.mEvdoDbm;
mEvdoEcio = s.mEvdoEcio;
mEvdoSnr = s.mEvdoSnr;
mLevel = s.mLevel;
}
/** @hide */
@Override
public CellSignalStrengthCdma copy() {
return new CellSignalStrengthCdma(this);
}
/** @hide */
@Override
public void setDefaultValues() {
mCdmaDbm = CellInfo.UNAVAILABLE;
mCdmaEcio = CellInfo.UNAVAILABLE;
mEvdoDbm = CellInfo.UNAVAILABLE;
mEvdoEcio = CellInfo.UNAVAILABLE;
mEvdoSnr = 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;
}
/** @hide */
@Override
public void updateLevel(PersistableBundle cc, ServiceState ss) {
int cdmaLevel = getCdmaLevel();
int evdoLevel = getEvdoLevel();
if (evdoLevel == SIGNAL_STRENGTH_NONE_OR_UNKNOWN) {
/* We don't know evdo, use cdma */
mLevel = getCdmaLevel();
} else if (cdmaLevel == SIGNAL_STRENGTH_NONE_OR_UNKNOWN) {
/* We don't know cdma, use evdo */
mLevel = getEvdoLevel();
} else {
/* We know both, use the lowest level */
mLevel = cdmaLevel < evdoLevel ? cdmaLevel : evdoLevel;
}
}
/**
* Get the 1xRTT Level in (Android) ASU.
*
* There is no standard definition of ASU for CDMA; however, Android defines it as the
* the lesser of the following two results (for 1xRTT):
*
* RSSI Range (dBm) ASU Value -75.. 16 -82..-76 8 -90..-83 4 -95..-91 2 -100..-96 1 ..-101 99
*
* Ec/Io Range (dB) ASU Value -90.. 16 -100..-91 8 -115..-101 4 -130..-116 2 --150..-131 1 ..-151 99
* @return 1xRTT Level in Android ASU {1,2,4,8,16,99}
*/
@Override
public int getAsuLevel() {
final int cdmaDbm = getCdmaDbm();
final int cdmaEcio = getCdmaEcio();
int cdmaAsuLevel;
int ecioAsuLevel;
if (cdmaDbm == CellInfo.UNAVAILABLE) cdmaAsuLevel = 99;
else if (cdmaDbm >= -75) cdmaAsuLevel = 16;
else if (cdmaDbm >= -82) cdmaAsuLevel = 8;
else if (cdmaDbm >= -90) cdmaAsuLevel = 4;
else if (cdmaDbm >= -95) cdmaAsuLevel = 2;
else if (cdmaDbm >= -100) cdmaAsuLevel = 1;
else cdmaAsuLevel = 99;
// Ec/Io are in dB*10
if (cdmaEcio == CellInfo.UNAVAILABLE) ecioAsuLevel = 99;
else if (cdmaEcio >= -90) ecioAsuLevel = 16;
else if (cdmaEcio >= -100) ecioAsuLevel = 8;
else if (cdmaEcio >= -115) ecioAsuLevel = 4;
else if (cdmaEcio >= -130) ecioAsuLevel = 2;
else if (cdmaEcio >= -150) ecioAsuLevel = 1;
else ecioAsuLevel = 99;
int level = (cdmaAsuLevel < ecioAsuLevel) ? cdmaAsuLevel : ecioAsuLevel;
if (DBG) log("getAsuLevel=" + level);
return level;
}
/**
* Get cdma as level 0..4
*/
public int getCdmaLevel() {
final int cdmaDbm = getCdmaDbm();
final int cdmaEcio = getCdmaEcio();
int levelDbm;
int levelEcio;
if (cdmaDbm == CellInfo.UNAVAILABLE) levelDbm = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
else if (cdmaDbm >= -75) levelDbm = SIGNAL_STRENGTH_GREAT;
else if (cdmaDbm >= -85) levelDbm = SIGNAL_STRENGTH_GOOD;
else if (cdmaDbm >= -95) levelDbm = SIGNAL_STRENGTH_MODERATE;
else if (cdmaDbm >= -100) levelDbm = SIGNAL_STRENGTH_POOR;
else levelDbm = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
// Ec/Io are in dB*10
if (cdmaEcio == CellInfo.UNAVAILABLE) levelEcio = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
else if (cdmaEcio >= -90) levelEcio = SIGNAL_STRENGTH_GREAT;
else if (cdmaEcio >= -110) levelEcio = SIGNAL_STRENGTH_GOOD;
else if (cdmaEcio >= -130) levelEcio = SIGNAL_STRENGTH_MODERATE;
else if (cdmaEcio >= -150) levelEcio = SIGNAL_STRENGTH_POOR;
else levelEcio = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
int level = (levelDbm < levelEcio) ? levelDbm : levelEcio;
if (DBG) log("getCdmaLevel=" + level);
return level;
}
/**
* Get Evdo as level 0..4
*/
public int getEvdoLevel() {
int evdoDbm = getEvdoDbm();
int evdoSnr = getEvdoSnr();
int levelEvdoDbm;
int levelEvdoSnr;
if (evdoDbm == CellInfo.UNAVAILABLE) levelEvdoDbm = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
else if (evdoDbm >= -65) levelEvdoDbm = SIGNAL_STRENGTH_GREAT;
else if (evdoDbm >= -75) levelEvdoDbm = SIGNAL_STRENGTH_GOOD;
else if (evdoDbm >= -90) levelEvdoDbm = SIGNAL_STRENGTH_MODERATE;
else if (evdoDbm >= -105) levelEvdoDbm = SIGNAL_STRENGTH_POOR;
else levelEvdoDbm = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
if (evdoSnr == CellInfo.UNAVAILABLE) levelEvdoSnr = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
else if (evdoSnr >= 7) levelEvdoSnr = SIGNAL_STRENGTH_GREAT;
else if (evdoSnr >= 5) levelEvdoSnr = SIGNAL_STRENGTH_GOOD;
else if (evdoSnr >= 3) levelEvdoSnr = SIGNAL_STRENGTH_MODERATE;
else if (evdoSnr >= 1) levelEvdoSnr = SIGNAL_STRENGTH_POOR;
else levelEvdoSnr = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
int level = (levelEvdoDbm < levelEvdoSnr) ? levelEvdoDbm : levelEvdoSnr;
if (DBG) log("getEvdoLevel=" + level);
return level;
}
/**
* Get the EVDO Level in (Android) ASU.
*
* There is no standard definition of ASU for CDMA; however, Android defines it as the
* the lesser of the following two results (for EVDO):
*
* RSSI Range (dBm) ASU Value -65.. 16 -75..-66 8 -85..-76 4 -95..-86 2 -105..-96 1 ..-106 99
*
* SNR Range (unitless) ASU Value 7.. 16 6 8 5 4 3..4 2 1..2 1 0 99
*
* @return EVDO Level in Android ASU {1,2,4,8,16,99}
*
* @hide
*/
public int getEvdoAsuLevel() {
int evdoDbm = getEvdoDbm();
int evdoSnr = getEvdoSnr();
int levelEvdoDbm;
int levelEvdoSnr;
if (evdoDbm >= -65) levelEvdoDbm = 16;
else if (evdoDbm >= -75) levelEvdoDbm = 8;
else if (evdoDbm >= -85) levelEvdoDbm = 4;
else if (evdoDbm >= -95) levelEvdoDbm = 2;
else if (evdoDbm >= -105) levelEvdoDbm = 1;
else levelEvdoDbm = 99;
if (evdoSnr >= 7) levelEvdoSnr = 16;
else if (evdoSnr >= 6) levelEvdoSnr = 8;
else if (evdoSnr >= 5) levelEvdoSnr = 4;
else if (evdoSnr >= 3) levelEvdoSnr = 2;
else if (evdoSnr >= 1) levelEvdoSnr = 1;
else levelEvdoSnr = 99;
int level = (levelEvdoDbm < levelEvdoSnr) ? levelEvdoDbm : levelEvdoSnr;
if (DBG) log("getEvdoAsuLevel=" + level);
return level;
}
/**
* Get the signal strength as dBm
*
* @return min(CDMA RSSI, EVDO RSSI) of the measured cell.
*/
@Override
public int getDbm() {
int cdmaDbm = getCdmaDbm();
int evdoDbm = getEvdoDbm();
// Use the lower value to be conservative
return (cdmaDbm < evdoDbm) ? cdmaDbm : evdoDbm;
}
/**
* Get the CDMA RSSI value in dBm
*/
public int getCdmaDbm() {
return mCdmaDbm;
}
/** @hide */
public void setCdmaDbm(int cdmaDbm) {
mCdmaDbm = cdmaDbm;
}
/**
* Get the CDMA Ec/Io value in dB*10
*/
public int getCdmaEcio() {
return mCdmaEcio;
}
/** @hide */
public void setCdmaEcio(int cdmaEcio) {
mCdmaEcio = cdmaEcio;
}
/**
* Get the EVDO RSSI value in dBm
*/
public int getEvdoDbm() {
return mEvdoDbm;
}
/** @hide */
public void setEvdoDbm(int evdoDbm) {
mEvdoDbm = evdoDbm;
}
/**
* Get the EVDO Ec/Io value in dB*10
*/
public int getEvdoEcio() {
return mEvdoEcio;
}
/** @hide */
public void setEvdoEcio(int evdoEcio) {
mEvdoEcio = evdoEcio;
}
/**
* Get the signal to noise ratio. Valid values are 0-8. 8 is the highest.
*/
public int getEvdoSnr() {
return mEvdoSnr;
}
/** @hide */
public void setEvdoSnr(int evdoSnr) {
mEvdoSnr = evdoSnr;
}
@Override
public int hashCode() {
return Objects.hash(mCdmaDbm, mCdmaEcio, mEvdoDbm, mEvdoEcio, mEvdoSnr, mLevel);
}
private static final CellSignalStrengthCdma sInvalid = new CellSignalStrengthCdma();
/** @hide */
@Override
public boolean isValid() {
return !this.equals(sInvalid);
}
@Override
public boolean equals (Object o) {
CellSignalStrengthCdma s;
if (!(o instanceof CellSignalStrengthCdma)) return false;
s = (CellSignalStrengthCdma) o;
return mCdmaDbm == s.mCdmaDbm
&& mCdmaEcio == s.mCdmaEcio
&& mEvdoDbm == s.mEvdoDbm
&& mEvdoEcio == s.mEvdoEcio
&& mEvdoSnr == s.mEvdoSnr
&& mLevel == s.mLevel;
}
/**
* @return string representation.
*/
@Override
public String toString() {
return "CellSignalStrengthCdma:"
+ " cdmaDbm=" + mCdmaDbm
+ " cdmaEcio=" + mCdmaEcio
+ " evdoDbm=" + mEvdoDbm
+ " evdoEcio=" + mEvdoEcio
+ " evdoSnr=" + mEvdoSnr
+ " level=" + mLevel;
}
/** Implement the Parcelable interface */
@Override
public void writeToParcel(Parcel dest, int flags) {
if (DBG) log("writeToParcel(Parcel, int): " + toString());
dest.writeInt(mCdmaDbm);
dest.writeInt(mCdmaEcio);
dest.writeInt(mEvdoDbm);
dest.writeInt(mEvdoEcio);
dest.writeInt(mEvdoSnr);
dest.writeInt(mLevel);
}
/**
* Construct a SignalStrength object from the given parcel
* where the TYPE_CDMA token is already been processed.
*/
private CellSignalStrengthCdma(Parcel in) {
// CdmaDbm, CdmaEcio, EvdoDbm and EvdoEcio are written into
// the parcel as positive values.
// Need to convert into negative values unless the value is invalid
mCdmaDbm = in.readInt();
mCdmaEcio = in.readInt();
mEvdoDbm = in.readInt();
mEvdoEcio = in.readInt();
mEvdoSnr = in.readInt();
mLevel = in.readInt();
if (DBG) log("CellSignalStrengthCdma(Parcel): " + toString());
}
/** Implement the Parcelable interface */
@Override
public int describeContents() {
return 0;
}
/** Implement the Parcelable interface */
@SuppressWarnings("hiding")
public static final @android.annotation.NonNull Parcelable.Creator CREATOR =
new Parcelable.Creator() {
@Override
public CellSignalStrengthCdma createFromParcel(Parcel in) {
return new CellSignalStrengthCdma(in);
}
@Override
public CellSignalStrengthCdma[] newArray(int size) {
return new CellSignalStrengthCdma[size];
}
};
/**
* log
*/
private static void log(String s) {
Rlog.w(LOG_TAG, s);
}
}