Wireless Oom

Among many, in this post, we focus on signal level perspective.

Suitable cell is defined:

Srxlev > 0
Squal > 0

Then, questions arise: what is Srxlev and Squal?

Srxlev = Qrxlev_meas – Qrxlevmin – Pcompensation

Qrxlevmin is the minimum received signal level defined for the cell (broadcast information). Qrxlevmin ranges from -115dBm to -25dBm.
Here, we use RSCP (power measured by a receiver on a particular physical communication channel. It is used as an indication of signal strength, as a handover criterion, in downlink power control, and to calculate path loss).

Pcompensation = Max (UE_TXPWR_MAX_RACH – P_MAX, 0)

UE_TXPWR_MAX_RACH is the broadcast value of the maximum RACH power and P_MAX is the UE maximum TX power.

Qrxlev_meas is the measured RSCP value at the device.
———————–

Squal = Qqual_meas – Qqualmin

Qqualmin is the minimum received signal quality defined for the cell. (broadcast value).
Here we use CPICH Ec/Io( measurement defined as the ration of the received energy per chip and the total receiver interference plus noise power spectral density.)

Qqual_meas is the received CPICH Ec/Io at the receiver.