317 lines
8.4 KiB
Java
317 lines
8.4 KiB
Java
/*
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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.os.Parcel;
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import android.os.Parcelable;
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import android.telephony.Rlog;
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/**
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* LTE signal strength related information.
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*/
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public final class CellSignalStrengthLte extends CellSignalStrength implements Parcelable {
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private static final String LOG_TAG = "CellSignalStrengthLte";
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private static final boolean DBG = false;
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private int mSignalStrength;
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private int mRsrp;
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private int mRsrq;
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private int mRssnr;
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private int mCqi;
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private int mTimingAdvance;
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/**
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* Empty constructor
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*
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* @hide
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*/
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public CellSignalStrengthLte() {
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setDefaultValues();
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}
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/**
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* Constructor
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*
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* @hide
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*/
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public CellSignalStrengthLte(int signalStrength, int rsrp, int rsrq, int rssnr, int cqi,
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int timingAdvance) {
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initialize(signalStrength, rsrp, rsrq, rssnr, cqi, timingAdvance);
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}
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/**
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* Copy constructors
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*
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* @param s Source SignalStrength
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*
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* @hide
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*/
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public CellSignalStrengthLte(CellSignalStrengthLte s) {
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copyFrom(s);
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}
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/**
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* Initialize all the values
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*
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* @param lteSignalStrength
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* @param rsrp
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* @param rsrq
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* @param rssnr
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* @param cqi
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*
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* @hide
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*/
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public void initialize(int lteSignalStrength, int rsrp, int rsrq, int rssnr, int cqi,
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int timingAdvance) {
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mSignalStrength = lteSignalStrength;
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mRsrp = rsrp;
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mRsrq = rsrq;
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mRssnr = rssnr;
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mCqi = cqi;
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mTimingAdvance = timingAdvance;
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}
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/**
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* Initialize from the SignalStrength structure.
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*
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* @param ss
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*
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* @hide
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*/
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public void initialize(SignalStrength ss, int timingAdvance) {
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mSignalStrength = ss.getLteSignalStrength();
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mRsrp = ss.getLteRsrp();
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mRsrq = ss.getLteRsrq();
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mRssnr = ss.getLteRssnr();
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mCqi = ss.getLteCqi();
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mTimingAdvance = timingAdvance;
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}
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/**
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* @hide
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*/
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protected void copyFrom(CellSignalStrengthLte s) {
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mSignalStrength = s.mSignalStrength;
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mRsrp = s.mRsrp;
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mRsrq = s.mRsrq;
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mRssnr = s.mRssnr;
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mCqi = s.mCqi;
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mTimingAdvance = s.mTimingAdvance;
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}
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/**
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* @hide
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*/
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@Override
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public CellSignalStrengthLte copy() {
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return new CellSignalStrengthLte(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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mSignalStrength = Integer.MAX_VALUE;
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mRsrp = Integer.MAX_VALUE;
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mRsrq = Integer.MAX_VALUE;
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mRssnr = Integer.MAX_VALUE;
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mCqi = Integer.MAX_VALUE;
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mTimingAdvance = Integer.MAX_VALUE;
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}
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/**
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* Get signal level as an int from 0..4
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*/
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@Override
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public int getLevel() {
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int levelRsrp = 0;
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int levelRssnr = 0;
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if (mRsrp == Integer.MAX_VALUE) levelRsrp = 0;
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else if (mRsrp >= -95) levelRsrp = SIGNAL_STRENGTH_GREAT;
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else if (mRsrp >= -105) levelRsrp = SIGNAL_STRENGTH_GOOD;
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else if (mRsrp >= -115) levelRsrp = SIGNAL_STRENGTH_MODERATE;
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else levelRsrp = SIGNAL_STRENGTH_POOR;
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// See RIL_LTE_SignalStrength in ril.h
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if (mRssnr == Integer.MAX_VALUE) levelRssnr = 0;
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else if (mRssnr >= 45) levelRssnr = SIGNAL_STRENGTH_GREAT;
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else if (mRssnr >= 10) levelRssnr = SIGNAL_STRENGTH_GOOD;
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else if (mRssnr >= -30) levelRssnr = SIGNAL_STRENGTH_MODERATE;
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else levelRssnr = SIGNAL_STRENGTH_POOR;
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int level;
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if (mRsrp == Integer.MAX_VALUE)
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level = levelRssnr;
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else if (mRssnr == Integer.MAX_VALUE)
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level = levelRsrp;
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else
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level = (levelRssnr < levelRsrp) ? levelRssnr : levelRsrp;
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if (DBG) log("Lte rsrp level: " + levelRsrp
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+ " snr level: " + levelRssnr + " level: " + level);
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return level;
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}
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/**
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* @hide
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*/
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public int getRsrq() {
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return mRsrq;
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}
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/**
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* @hide
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*/
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public int getRssnr() {
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return mRssnr;
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}
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/**
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* Get signal strength as dBm
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*/
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@Override
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public int getDbm() {
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return mRsrp;
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}
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/**
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* Get the LTE signal level as an asu value between 0..97, 99 is unknown
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* Asu is calculated based on 3GPP RSRP. Refer to 3GPP 27.007 (Ver 10.3.0) Sec 8.69
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*/
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@Override
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public int getAsuLevel() {
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int lteAsuLevel = 99;
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int lteDbm = getDbm();
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if (lteDbm <= -140) lteAsuLevel = 0;
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else if (lteDbm >= -43) lteAsuLevel = 97;
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else lteAsuLevel = lteDbm + 140;
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if (DBG) log("Lte Asu level: "+lteAsuLevel);
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return lteAsuLevel;
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}
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/**
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* Get the timing advance value for LTE.
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* See 3GPP xxxx
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*/
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public int getTimingAdvance() {
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return mTimingAdvance;
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}
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@Override
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public int hashCode() {
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int primeNum = 31;
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return (mSignalStrength * primeNum) + (mRsrp * primeNum)
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+ (mRsrq * primeNum) + (mRssnr * primeNum) + (mCqi * primeNum)
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+ (mTimingAdvance * primeNum);
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}
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@Override
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public boolean equals (Object o) {
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CellSignalStrengthLte s;
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try {
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s = (CellSignalStrengthLte) o;
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} catch (ClassCastException ex) {
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return false;
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}
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if (o == null) {
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return false;
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}
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return mSignalStrength == s.mSignalStrength
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&& mRsrp == s.mRsrp
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&& mRsrq == s.mRsrq
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&& mRssnr == s.mRssnr
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&& mCqi == s.mCqi
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&& mTimingAdvance == s.mTimingAdvance;
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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 "CellSignalStrengthLte:"
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+ " ss=" + mSignalStrength
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+ " rsrp=" + mRsrp
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+ " rsrq=" + mRsrq
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+ " rssnr=" + mRssnr
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+ " cqi=" + mCqi
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+ " ta=" + mTimingAdvance;
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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(mSignalStrength);
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// Need to multiply rsrp and rsrq by -1
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// to ensure consistency when reading values written here
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dest.writeInt(mRsrp * -1);
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dest.writeInt(mRsrq * -1);
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dest.writeInt(mRssnr);
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dest.writeInt(mCqi);
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dest.writeInt(mTimingAdvance);
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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 CellSignalStrengthLte(Parcel in) {
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mSignalStrength = in.readInt();
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// rsrp and rsrq are written into the parcel as positive values.
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// Need to convert into negative values
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mRsrp = in.readInt() * -1;
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mRsrq = in.readInt() * -1;
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mRssnr = in.readInt();
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mCqi = in.readInt();
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mTimingAdvance = in.readInt();
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if (DBG) log("CellSignalStrengthLte(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 Parcelable.Creator<CellSignalStrengthLte> CREATOR =
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new Parcelable.Creator<CellSignalStrengthLte>() {
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@Override
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public CellSignalStrengthLte createFromParcel(Parcel in) {
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return new CellSignalStrengthLte(in);
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}
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@Override
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public CellSignalStrengthLte[] newArray(int size) {
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return new CellSignalStrengthLte[size];
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}
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};
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/**
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* log
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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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