343 lines
11 KiB
Java
343 lines
11 KiB
Java
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/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.telephony;
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import android.annotation.IntRange;
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import android.annotation.StringDef;
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import android.compat.annotation.UnsupportedAppUsage;
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import android.os.Parcel;
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import android.os.Parcelable;
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import android.os.PersistableBundle;
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import android.text.TextUtils;
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import com.android.telephony.Rlog;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.util.Objects;
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/**
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* Wcdma signal strength related information.
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*/
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public final class CellSignalStrengthWcdma extends CellSignalStrength implements Parcelable {
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private static final String LOG_TAG = "CellSignalStrengthWcdma";
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private static final boolean DBG = false;
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private static final int WCDMA_RSSI_MAX = -51;
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private static final int WCDMA_RSSI_GREAT = -77;
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private static final int WCDMA_RSSI_GOOD = -87;
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private static final int WCDMA_RSSI_MODERATE = -97;
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private static final int WCDMA_RSSI_POOR = -107;
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private static final int WCDMA_RSSI_MIN = -113;
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private static final int[] sRssiThresholds = new int[]{
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WCDMA_RSSI_POOR, WCDMA_RSSI_MODERATE, WCDMA_RSSI_GOOD, WCDMA_RSSI_GREAT};
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private static final int WCDMA_RSCP_MAX = -24;
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private static final int WCDMA_RSCP_GREAT = -85;
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private static final int WCDMA_RSCP_GOOD = -95;
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private static final int WCDMA_RSCP_MODERATE = -105;
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private static final int WCDMA_RSCP_POOR = -115;
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private static final int WCDMA_RSCP_MIN = -120;
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private static final int[] sRscpThresholds = new int[] {
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WCDMA_RSCP_POOR, WCDMA_RSCP_MODERATE, WCDMA_RSCP_GOOD, WCDMA_RSCP_GREAT};
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// TODO: Because these are used as values in CarrierConfig, they should be exposed somehow.
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/** @hide */
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@Retention(RetentionPolicy.SOURCE)
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@StringDef({LEVEL_CALCULATION_METHOD_RSSI, LEVEL_CALCULATION_METHOD_RSCP})
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public @interface LevelCalculationMethod {}
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/** @hide */
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public static final String LEVEL_CALCULATION_METHOD_RSSI = "rssi";
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/** @hide */
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public static final String LEVEL_CALCULATION_METHOD_RSCP = "rscp";
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// Default to RSSI for backwards compatibility with older devices
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private static final String DEFAULT_LEVEL_CALCULATION_METHOD = LEVEL_CALCULATION_METHOD_RSSI;
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private int mRssi; // in dBm [-113, 51] or CellInfo.UNAVAILABLE if unknown
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@UnsupportedAppUsage
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private int mBitErrorRate; // bit error rate (0-7, 99) as defined in TS 27.007 8.5 or
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// CellInfo.UNAVAILABLE if unknown
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private int mRscp; // in dBm [-120, -24]
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private int mEcNo; // range -24, 1, CellInfo.UNAVAILABLE if unknown
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private int mLevel;
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/** @hide */
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public CellSignalStrengthWcdma() {
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setDefaultValues();
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}
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/** @hide */
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public CellSignalStrengthWcdma(int rssi, int ber, int rscp, int ecno) {
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mRssi = inRangeOrUnavailable(rssi, WCDMA_RSSI_MIN, WCDMA_RSSI_MAX);
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mBitErrorRate = inRangeOrUnavailable(ber, 0, 7, 99);
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mRscp = inRangeOrUnavailable(rscp, -120, -24);
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mEcNo = inRangeOrUnavailable(ecno, -24, 1);
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updateLevel(null, null);
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}
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/** @hide */
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public CellSignalStrengthWcdma(CellSignalStrengthWcdma s) {
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copyFrom(s);
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}
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/** @hide */
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protected void copyFrom(CellSignalStrengthWcdma s) {
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mRssi = s.mRssi;
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mBitErrorRate = s.mBitErrorRate;
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mRscp = s.mRscp;
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mEcNo = s.mEcNo;
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mLevel = s.mLevel;
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}
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/** @hide */
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@Override
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public CellSignalStrengthWcdma copy() {
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return new CellSignalStrengthWcdma(this);
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}
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/** @hide */
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@Override
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public void setDefaultValues() {
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mRssi = CellInfo.UNAVAILABLE;
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mBitErrorRate = CellInfo.UNAVAILABLE;
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mRscp = CellInfo.UNAVAILABLE;
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mEcNo = CellInfo.UNAVAILABLE;
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mLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
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}
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/** {@inheritDoc} */
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@Override
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@IntRange(from = SIGNAL_STRENGTH_NONE_OR_UNKNOWN, to = SIGNAL_STRENGTH_GREAT)
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public int getLevel() {
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return mLevel;
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}
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/** @hide */
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@Override
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public void updateLevel(PersistableBundle cc, ServiceState ss) {
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String calcMethod;
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int[] rscpThresholds;
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if (cc == null) {
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calcMethod = DEFAULT_LEVEL_CALCULATION_METHOD;
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rscpThresholds = sRscpThresholds;
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} else {
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// TODO: abstract this entire thing into a series of functions
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calcMethod = cc.getString(
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CarrierConfigManager.KEY_WCDMA_DEFAULT_SIGNAL_STRENGTH_MEASUREMENT_STRING,
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DEFAULT_LEVEL_CALCULATION_METHOD);
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if (TextUtils.isEmpty(calcMethod)) calcMethod = DEFAULT_LEVEL_CALCULATION_METHOD;
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rscpThresholds = cc.getIntArray(
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CarrierConfigManager.KEY_WCDMA_RSCP_THRESHOLDS_INT_ARRAY);
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if (rscpThresholds == null || rscpThresholds.length != NUM_SIGNAL_STRENGTH_THRESHOLDS) {
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rscpThresholds = sRscpThresholds;
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}
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}
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int level = NUM_SIGNAL_STRENGTH_THRESHOLDS;
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switch (calcMethod) {
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case LEVEL_CALCULATION_METHOD_RSCP:
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if (mRscp < WCDMA_RSCP_MIN || mRscp > WCDMA_RSCP_MAX) {
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mLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
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return;
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}
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while (level > 0 && mRscp < rscpThresholds[level - 1]) level--;
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mLevel = level;
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return;
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default:
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loge("Invalid Level Calculation Method for CellSignalStrengthWcdma = "
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+ calcMethod);
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/** fall through */
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case LEVEL_CALCULATION_METHOD_RSSI:
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if (mRssi < WCDMA_RSSI_MIN || mRssi > WCDMA_RSSI_MAX) {
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mLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
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return;
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}
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while (level > 0 && mRssi < sRssiThresholds[level - 1]) level--;
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mLevel = level;
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return;
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}
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}
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/**
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* Get the RSCP as dBm value -120..-24dBm or {@link CellInfo#UNAVAILABLE UNAVAILABLE}.
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*/
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@Override
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public int getDbm() {
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if (mRscp != CellInfo.UNAVAILABLE) return mRscp;
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return mRssi;
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}
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/**
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* Get the RSCP in ASU.
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*
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* Asu is calculated based on 3GPP RSCP. Refer to 3GPP 27.007 (Ver 10.3.0) Sec 8.69
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*
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* @return RSCP in ASU 0..96, 255, or UNAVAILABLE
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*/
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@Override
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public int getAsuLevel() {
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if (mRscp != CellInfo.UNAVAILABLE) return getAsuFromRscpDbm(mRscp);
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// For historical reasons, if RSCP is unavailable, this API will very incorrectly return
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// RSSI. This hackery will be removed when most devices are using Radio HAL 1.2+
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if (mRssi != CellInfo.UNAVAILABLE) return getAsuFromRssiDbm(mRssi);
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return getAsuFromRscpDbm(CellInfo.UNAVAILABLE);
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}
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/**
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* Get the RSSI as dBm
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*
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* @hide
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*/
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public int getRssi() {
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return mRssi;
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}
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/**
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* Get the RSCP as dBm
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*
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* @hide
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*/
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public int getRscp() {
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return mRscp;
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}
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/**
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* Get the Ec/No (Energy per chip over the noise spectral density) as dB.
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*
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* Reference: TS 25.133 Section 9.1.2.3
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*
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* @return the Ec/No of the measured cell in the range [-24, 1] or
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* {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable
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*/
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public int getEcNo() {
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return mEcNo;
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}
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/**
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* Return the Bit Error Rate
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*
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* @returns the bit error rate (0-7, 99) as defined in TS 27.007 8.5 or UNAVAILABLE.
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* @hide
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*/
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public int getBitErrorRate() {
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return mBitErrorRate;
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}
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@Override
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public int hashCode() {
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return Objects.hash(mRssi, mBitErrorRate, mRscp, mEcNo, mLevel);
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}
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private static final CellSignalStrengthWcdma sInvalid = new CellSignalStrengthWcdma();
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/** @hide */
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@Override
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public boolean isValid() {
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return !this.equals(sInvalid);
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}
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@Override
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public boolean equals(Object o) {
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if (!(o instanceof CellSignalStrengthWcdma)) return false;
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CellSignalStrengthWcdma s = (CellSignalStrengthWcdma) o;
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return mRssi == s.mRssi
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&& mBitErrorRate == s.mBitErrorRate
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&& mRscp == s.mRscp
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&& mEcNo == s.mEcNo
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&& mLevel == s.mLevel;
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}
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/**
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* @return string representation.
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*/
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@Override
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public String toString() {
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return "CellSignalStrengthWcdma:"
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+ " ss=" + mRssi
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+ " ber=" + mBitErrorRate
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+ " rscp=" + mRscp
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+ " ecno=" + mEcNo
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+ " level=" + mLevel;
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}
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/** Implement the Parcelable interface */
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@Override
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public void writeToParcel(Parcel dest, int flags) {
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if (DBG) log("writeToParcel(Parcel, int): " + toString());
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dest.writeInt(mRssi);
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dest.writeInt(mBitErrorRate);
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dest.writeInt(mRscp);
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dest.writeInt(mEcNo);
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dest.writeInt(mLevel);
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}
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/**
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* Construct a SignalStrength object from the given parcel
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* where the token is already been processed.
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*/
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private CellSignalStrengthWcdma(Parcel in) {
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mRssi = in.readInt();
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mBitErrorRate = in.readInt();
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mRscp = in.readInt();
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mEcNo = in.readInt();
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mLevel = in.readInt();
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if (DBG) log("CellSignalStrengthWcdma(Parcel): " + toString());
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}
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/** Implement the Parcelable interface */
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@Override
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public int describeContents() {
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return 0;
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}
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/** Implement the Parcelable interface */
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@SuppressWarnings("hiding")
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public static final @android.annotation.NonNull Parcelable.Creator<CellSignalStrengthWcdma> CREATOR =
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new Parcelable.Creator<CellSignalStrengthWcdma>() {
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@Override
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public CellSignalStrengthWcdma createFromParcel(Parcel in) {
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return new CellSignalStrengthWcdma(in);
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}
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@Override
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public CellSignalStrengthWcdma[] newArray(int size) {
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return new CellSignalStrengthWcdma[size];
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}
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};
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/**
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* log warning
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*/
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private static void log(String s) {
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Rlog.w(LOG_TAG, s);
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}
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/**
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* log error
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*/
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private static void loge(String s) {
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Rlog.e(LOG_TAG, s);
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}
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}
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