Valori di segnale, cosa significa "asu"?

[gattopallino]

salve , nel mio telefono nella casella " INTENSITA' SEGNALE " c'e scritto ( -109 dbm 2 asu ) 109 so' che e' il rumore , ma 2 asu cosa vogliono dire ????

[matr]

ASU means:
Although the mobile standards define an ASU message ("Active Set Update") used in handover procedures, on Android phones the acronym ASU has nothing to do with Active Set Update. It seems not to be declared precisely by Google developers but probably means "Arbitrary Scale Unit" or "Android Signal Unit". (see NeighboringCellInfo)
It is an integer value proportional to the received signal strength measured by the mobile phone. It is possible to calculate the real signal strength measured in dBm (and hence Watt) by a formula. However, there are different formulas for 2G and 3G networks.
In GSM networks, ASU is equal to the RSSI (received signal strength indicator, see TS 27.007).
dBm = 2*ASU - 113, ASU in the range of 0..31 and 99
In UMTS networks, ASU is equal the RSCP level (received signal control power, see TS 25.125)
dBm = ASU - 116, ASU in the range of -5..91