Mobile Signal Strength Recommendations: Difference between revisions

Revision as of 07:19, 29 September 2017

Summary

This chapter is an overview of recommended signal strength levels for different mobile service modes.

Signal Measurement

Signal strength values are defined by a few different measurements which vary even more for different service modes. These measurements are as follows:

RSSI
RSRP
RSRQ
RSCP
SINR
EC/IO

2G (GSM)

2G (GSM) Signal strength is defined by only one value: RSSI – Received Signal Strength Indicator;

RSSI
RSSI	Signal strength
> -70 dBm	Excellent
-70 dBm to -85 dBm	Good
-86 dBm to -100 dBm	Fair
< -100 dBm	Poor
-110 dBm	No signal

3G (WCDMA, TDSCDMA, CDMA, EVDO, CDMA-EVDO)

For 3G service mode, there are three relevant measurements:

RSSI - indicates the received signal strength
EC/IO - indicates the downlink carrier-to-interference ratio (signal quality)
RSCP - indicates the received signal code power

The RSSI standard values for 3G are the same as 2G

RSSI
RSSI	Signal strength
> -70 dBm	Excellent
-70 dBm to -85 dBm	Good
-86 dBm to -100 dBm	Fair
< -100 dBm	Poor
-110 dBm	No signal

EC/IO
EC/IO	Signal quality
0 to -6	Excellent
-7 to -10	Good
-11 to -20	Fair to poor

@@ Line 18: / Line 18: @@
 {| class="wikitable"
-|+
+|+ style="text-align: left;" | RSSI
 ! style="width: 500px; background: black; color: white;" | RSSI
 ! style="width: 500px; background: black; color: white;" | Signal strength
@@ Line 47: / Line 47: @@
 *RSCP - indicates the received signal code power
+The RSSI standard values for 3G are the same as 2G
 {| class="wikitable"
-|+ style="text-align: left;" | EC/IO
+|+ style="text-align: left;" | RSSI
-! style="width: 250px; background: black; color: white;" | EC/IO
+! style="width: 500px; background: black; color: white;" | RSSI
-! style="width: 250px; background: black; color: white;" | Signal quality
+! style="width: 500px; background: black; color: white;" | Signal strength
 |-
-! style="text-align: left; background: #6ACE61;" | 0 to -6
+! style="text-align: left; background: #6ACE61;" | > -70 dBm
 | style="text-align: left; background: #6ACE61;" | '''Excellent'''
 |-
-! style="text-align: left; background: #FBFB43;" | -7 to -10
+! style="text-align: left; background: #FBFB43;" | -70 dBm to -85 dBm
 | style="text-align: left; background: #FBFB43;" | '''Good'''
 |-
-! style="text-align: left; background: #EC031D;" | -11 to -20
+! style="text-align: left; background: #F7BA30;" | -86 dBm to -100 dBm
-| style="text-align: left; background: #EC031D;" | '''Fair to poor'''
+| style="text-align: left; background: #F7BA30;" | '''Fair'''
+|-
+! style="text-align: left; background: #EC031D;" | < -100 dBm
+| style="text-align: left; background: #EC031D;" | '''Poor'''
+|-
+! style="text-align: left; background: #AB0312;" | -110 dBm
+| style="text-align: left; background: #AB0312;" | '''No signal'''
 |-
 |}
 {| class="wikitable"
-|+ style="text-align: left;" | RSCP
+|+ style="text-align: left;" | EC/IO
 ! style="width: 250px; background: black; color: white;" | EC/IO
 ! style="width: 250px; background: black; color: white;" | Signal quality