问题
I'm playing around with reading the signal strengths in a small Android App, and was wondering if anyone has tested this (or just knows) of the documented values (0-31, 99) which value is better.
By asking which is better, I mean, does 0 represent no signal, or perfect signal.
I'm running an HTC Incredible on Verizon, so I can confirm the 99 is no GSM antenna, but I could not find any other items on GSM
回答1:
The values are defined in the GSM standard TS 27.007, section 8.5 (Google it, or see here)
From the standard:
0 -113 dBm or less
1 -111 dBm
2...30 -109... -53 dBm
31 -51 dBm or greater
99 not known or not detectable
Which means - 0 is low, 31 is good.
来源：https://stackoverflow.com/questions/3427571/which-values-high-or-low-are-better-in-androids-getgsmsignalstrength