GSM Cell Table & KPIs
The view displays the serving cell (always on top) and up to eight neighbors (in order of descending signal strength).
PLMN: Public Land Mobile Network, MCC and MNC (Serving cell Mobile Country Code and Serving cell Mobile Network Code)
LAC: Serving cell Location Area Code
CellID: Serving Cell Identity, 16 bits, decimal
Band Class: GSM Serving band, GSM900, DCS1800, PCS1900, 450M, 700M etc.
MS TxPower: Transmit Power of Mobile Stations, Indicates the value of transmit power currently in use by the mobile active in call. This is expressed as either the power down from maximum in 2dB increments
RxLev Full/Sub: Serving Cell RxLev Full in dBm (for example, -78). This indicates the value of received signal strength (RxLev) measured by the mobile for the serving cell when in call. The full average comprises all of the samples taken over the SACCH period. The sub average comprises a subset of samples on the mandatory bursts within the SACCH period.
RxQual Full/Sub: Received Signal Quality, Full/Sub. Serving Cell RxQual Full range 0...7 (for example, 2). This indicates the value of bit error rate class represented by RxQual measured by the mobile for the serving cell when in call and averaged for all the samples over the previous SACCH period. The sub average comprises of a subset of samples on the mandatory bursts within the SACCH period. The range of RxQualSub is 0-7.
RLT Current/Max: Radio Link Timeout, Current/Max ratio. Identifies the maximum value of the radio link timeout (in SACCH periods) used to determine if the message loss rate renders the downlink speech path unusable. Current is the actual value of timing out.
S: Serving cell
N: Neighbor cell.
ARFCN: Identifies the Absolute Radio Frequency Channel Number supporting the Broadcast Control Channel for the current serving cell.
BSIC: Base Station Identity Code, Identifies the Base Station Identity Code for the serving cell.
RxLev: Indicates the value of received signal strength (RxLev) measured by the mobile on the "camped" cell in the idle mode.
C1: Pathloss Criterion C1. Path loss criterion used for cell selection and reselection. It is defined by the following formula:
(A - Max( B, 0 ) )
A = Received level average - RXLEV_ACCESS_MIN
B = MSTxPWR_MAXCCH – P
P = Maximum RF Output power of the MS.
RXLEV_ACCESS_MIN = Minimum received level at the MS required for access to the system.
MSTxPWR_MAXCCH = Maximum TX power level a MS may use when accessing the system until otherwise commanded.
Except for the class 3 DCS 1800 mobile, where:
B = MSTxPWR_MAXCCH + POWER OFFSET - P
The path loss criterion is satisfied if C1 > 0.
For further information on criteria for cell selection and reselection, please consult the GSM specifications 05.08.
C2: Cell Reselection Criterion C2. Used only for cell reselection and defined by the following:
C2 (dB) = C1 (dB) + CellReselectOffset (dB) - TemporaryOffset(dB) * H(PenaltyTime (s) - T)
In cases when PenaltyTime = 11111:
C2 (dB) = C1 (dB) - CellReselectOffset (dB)
For non-serving cells:
H(x) = 0, when x < 0 and 1 when x >= 0
For serving cells:
H(x) = 0