ASU

ASU or "Arbitrary Backbone Unit" is an accumulation amount proportional to the accustomed arresting backbone abstinent by the adaptable phone.

It is accessible to account the absolute arresting backbone abstinent in dBm (and thereby ability in Watts) by a formula. However, there are altered formulas for 2G and 3G networks.

In GSM networks, ASU is according to the RSSI (received arresting backbone indicator, see TS 27.007).

dBm = 2*ASU - 113, ASU in the ambit of 0..31 and 99

In UMTS networks, ASU is according the RSCP akin (received arresting cipher power, see TS 25.125)

dBm = ASU - 116, ASU in the ambit of -5..91

It is broadly misbelieved that ASU = "Active Set update". The Active Set Update is a signalling bulletin acclimated in handover procedures of UMTS and CDMA adaptable telephony standards. On Android phones the acronym ASU has annihilation to do with Active Set Update. It has not been declared absolutely by Google developers. (see NeighboringCellInfo)

There are abounding GSM and UMTS Arresting Monitoring applications accessible for the Android operating system.