ZyXEL Communications Nebula LTE3301-PLUS User Manual page 272

Table 116 System Monitor > Cellular WAN Status (continued)
LABEL DESCRIPTION
MCS MCS stands for modulation coding scheme. The base station selects MCS based on current
radio conditions. The higher the MCS the more bits can be transmitted per time unit.
RI This displays the Rank Indication, one of the control information that a UE will report to eNodeB
(Evolved Node-B) on either PUCCH (Physical Uplink Control Channel) or PUSCH (Physical Uplink
Shared Channel) based on uplink scheduling.
PMI This displays the Precoding Matrix Indicator (PMI).
PMI is for transmission modes 4 (closed loop spatial multiplexing), 5 (multi-user MIMO), and 6
(closed loop spatial multiplexing using a single layer).
PMI determines how cellular data are encoded for the antennas to improve the downlink rate.
Neighbour Cells This displays the type of the neighbor cell's carrier frequency detected by the Zyxel Device.
Intra-Frequency – when the current cell and target cell operate on the same carrier frequency.
Inter-Frequency – when the current cell and target cell operate on different carrier frequencies.
# This is the index number of the entry.
Connection This displays the connection mode of the detected neighbor cell.
Mode
PhyCellID This shows the Physical Cell ID (PCI), which are queries and replies between the Zyxel Device and
the mobile network it is connecting to. The normal range is 0 to 503.
RFCN This displays the Radio Frequency Channel Number (RFCN) of the detected base station. This is
the carrier frequency designated by EARFCN. The range is 0 – 65535.
RSSI This displays the Received Signal Strength Indicator (RSSI) level of the detected base station.
RSSI is an indicator of the signal strength, including signals and noises received by the target cell.
The normal range is –30dBm to –79dBm.
RSRP This displays the Reference Symbol Received Power (RSRP) level of the detected base station.
RSRP is the average signal strength of the target station and is usually measured during a
handover. The normal range is –140dBm to –44dBm.
RSRQ This displays the Reference Signal Received Quality (RSRQ) level of the detected base station.
RSRQ is the indicator of the signal quality of data transmission. The normal range is –24.0dB to
0dB.
RSRQ is defined as RSRP/RSSI*N. N is the number of resource blocks. A resource block is the
smallest unit of radio resources allocated to a user and contains twelve sub-carriers in frequency
and 0.5 ms in time.
Chapter 26 Cellular WAN Status
Nebula Mobile Router User's Guide
272