I don't see how fixing this on ofono layer requires any changes; we only
have to modify the mapping.
Android code itself defines 5 discrete strengths:
- SIGNAL_STRENGTH_GREAT
- SIGNAL_STRENGTH_GOOD
- SIGNAL_STRENGTH_MODERATE
- SIGNAL_STRENGTH_POOR
- SIGNAL_STRENGTH_NONE_OR_UNKNOWN
We can map those (how ever they are calculated) to the linear and evenly
distributed range of [0..100].
As an example:
int asu = getGsmSignalStrength();
// 0-20% - SIGNAL_STRENGTH_NONE_OR_UNKNOWN
if (asu == 99)
level = 0;
else if (asu == 0)
level = 6;
else if (asu == 1)
level = 12;
else if (asu == 2)
level = 18;
// 20-40% - SIGNAL_STRENGTH_POOR
else if (asu == 3)
level = 25;
else if (asu = 4)
level = 35;
// 40-60% - SIGNAL_STRENGTH_MODERATE
else if (asu = 5)
level = 46;
else if (asu = 6)
level = 52;
else if (asu = 7)
level = 58;
// 60-80% SIGNAL_STRENGTH_GOOD
else if (asu = 8)
level = 60;
else if (asu = 9)
level = 65;
else if (asu = 10)
level = 70;
else if (asu = 11)
level = 75;
// 80-100% - SIGNAL_STRENGTH_GREAT
else if (asu >= 12)
level = 80 + 20*(1 - (31-asu)/19.0);
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https://bugs.launchpad.net/bugs/1329945
Title:
WWAN signal strength is reported lower than android in same location
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