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Improve a calculation method for LTE antenna reception level

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RSRP value thresholds is relatively high compared with
other mobile phone platforms, which make android seems
low sensitive to radio. This patch sets better thresholds.

Bug: 17891524
Change-Id: I502e1c3d08b2a52c51fe93da9b77476ac827a25b
This commit is contained in:
Kensuke Ueda
2013-02-27 17:27:53 +09:00
committed by Amit Mahajan
parent b9eabc5c2b
commit c962b1dcfb
5 changed files with 46 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
core/res/res/values-mcc204-mnc04/config.xml
View File

@@ -31,4 +31,11 @@
<item>"*611:+19085594899,BAE0000000000000"</item>
<item>"*86:+1MDN,BAE0000000000000"</item>
</string-array>
<!-- Flag indicating whether strict threshold is used, or lenient threshold is used,
when evaluating RSRP for LTE antenna bar display
0. Strict threshold
1. Lenient threshold
-->
<integer name="config_LTE_RSRP_threshold_type">0</integer>
</resources>

7
core/res/res/values-mcc311-mnc480/config.xml
View File

@@ -49,4 +49,11 @@
<item>"*611:+19085594899,"</item>
<item>"*86:+1MDN,"</item>
</string-array>
<!-- Flag indicating whether strict threshold is used, or lenient threshold is used,
when evaluating RSRP for LTE antenna bar display
0. Strict threshold
1. Lenient threshold
-->
<integer name="config_LTE_RSRP_threshold_type">0</integer>
</resources>

7
core/res/res/values/config.xml
View File

@@ -1885,4 +1885,11 @@
<bool name="config_switch_phone_on_voice_reg_state_change">true</bool>
<bool name="config_sms_force_7bit_encoding">false</bool>
<!-- Flag indicating whether strict threshold is used, or lenient threshold is used,
when evaluating RSRP for LTE antenna bar display
0. Strict threshold
1. Lenient threshold
-->
<integer name="config_LTE_RSRP_threshold_type">1</integer>
</resources>

3
core/res/res/values/symbols.xml
View File

@@ -2094,4 +2094,7 @@
<java-symbol type="layout" name="simple_account_item" />
<java-symbol type="id" name="scrollIndicatorUp" />
<java-symbol type="id" name="scrollIndicatorDown" />
<!-- From SignalStrength -->
<java-symbol type="integer" name="config_LTE_RSRP_threshold_type" />
</resources>

28
telephony/java/android/telephony/SignalStrength.java
View File

@@ -20,6 +20,7 @@ import android.os.Bundle;
import android.os.Parcel;
import android.os.Parcelable;
import android.telephony.Rlog;
import android.content.res.Resources;
/**
* Contains phone signal strength related information.
@@ -50,6 +51,11 @@ public class SignalStrength implements Parcelable {
//Use int max, as -1 is a valid value in signal strength
public static final int INVALID = 0x7FFFFFFF;
private static final int RSRP_THRESH_TYPE_STRICT = 0;
private static final int[] RSRP_THRESH_STRICT = new int[] {-140, -115, -105, -95, -85, -44};
private static final int[] RSRP_THRESH_LENIENT = new int[] {-140, -128, -118, -108, -98, -44};
private int mGsmSignalStrength; // Valid values are (0-31, 99) as defined in TS 27.007 8.5
private int mGsmBitErrorRate; // bit error rate (0-7, 99) as defined in TS 27.007 8.5
private int mCdmaDbm; // This value is the RSSI value
@@ -745,12 +751,21 @@ public class SignalStrength implements Parcelable {
*/
int rssiIconLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN, rsrpIconLevel = -1, snrIconLevel = -1;
if (mLteRsrp > -44) rsrpIconLevel = -1;
else if (mLteRsrp >= -85) rsrpIconLevel = SIGNAL_STRENGTH_GREAT;
else if (mLteRsrp >= -95) rsrpIconLevel = SIGNAL_STRENGTH_GOOD;
else if (mLteRsrp >= -105) rsrpIconLevel = SIGNAL_STRENGTH_MODERATE;
else if (mLteRsrp >= -115) rsrpIconLevel = SIGNAL_STRENGTH_POOR;
else if (mLteRsrp >= -140) rsrpIconLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
int rsrpThreshType = Resources.getSystem().getInteger(com.android.internal.R.integer.
config_LTE_RSRP_threshold_type);
int[] threshRsrp;
if (rsrpThreshType == RSRP_THRESH_TYPE_STRICT) {
threshRsrp = RSRP_THRESH_STRICT;
} else {
threshRsrp = RSRP_THRESH_LENIENT;
}
if (mLteRsrp > threshRsrp[5]) rsrpIconLevel = -1;
else if (mLteRsrp >= threshRsrp[4]) rsrpIconLevel = SIGNAL_STRENGTH_GREAT;
else if (mLteRsrp >= threshRsrp[3]) rsrpIconLevel = SIGNAL_STRENGTH_GOOD;
else if (mLteRsrp >= threshRsrp[2]) rsrpIconLevel = SIGNAL_STRENGTH_MODERATE;
else if (mLteRsrp >= threshRsrp[1]) rsrpIconLevel = SIGNAL_STRENGTH_POOR;
else if (mLteRsrp >= threshRsrp[0]) rsrpIconLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
/*
* Values are -200 dB to +300 (SNR*10dB) RS_SNR >= 13.0 dB =>4 bars 4.5
@@ -789,6 +804,7 @@ public class SignalStrength implements Parcelable {
else if (mLteSignalStrength >= 8) rssiIconLevel = SIGNAL_STRENGTH_GOOD;
else if (mLteSignalStrength >= 5) rssiIconLevel = SIGNAL_STRENGTH_MODERATE;
else if (mLteSignalStrength >= 0) rssiIconLevel = SIGNAL_STRENGTH_POOR;
if (DBG) log("getLTELevel - rssi:" + mLteSignalStrength + " rssiIconLevel:"
+ rssiIconLevel);
return rssiIconLevel;