The purpose of this page is to document rmanager commands in the yateenb module.
This content should be move to the public wiki when it is presentable.
These are commands that touch multiple layers in the yateenb module.
These commands start, stop, and restart the yateenb module independently of the Yate engine and the rest of the eNodeB.
This command shows the processing timeline inside the yateenb module, in terms of what subframe is being processed in each layer of UL and DL and the number of samples of lag between the RX and TX sides of the radio interface.
> enb time
Modulator: 61476732|601:2:0:0 (860674248)
Radio TX: 61476730|601:0:0:0 (860674220) sample=472141286400
Radio RX: 61476729|600:9:0:0 (860674206) sample=472141278720
Demodulator: 61476729|600:9:0:0 (860674206)
TX-RX: 1|0:1:0:0 (14) sample: 7680
RadioDevTX: 472141276087 delta_from_us=-10313
RadioDevRX: 472141279717 delta_from_us=997
enb measurements commands
Commands in the “measurements” group operate on the KPI-related measurements in the yateenb module. These measurements are kept in the ENB by an object called the Measurement Engine.
enb measurements report
Clear the MeasurementEngine and start a new baseline for measurement recording.
Print only summations and averages from the MeasurementEngine.
enb measurements pat=< regex >
Print measurements with names matching a regular expression. For example, this can be used to show the raw information used to generate “enb measurements report”, or to isolate a group of measurements defined in the standard.
Some useful ones:
This command works with the MeasurementEngine, like “enb measurements”, but is intended for automation interfaces instead of human use. The form is:
status enb [summary] [clear] [rrc] [carriers] [drb] [erab] [equipment] [rru] [paging] [s1ap] [tb] [srb] [bearers] [phy] [all]
The first options are control options:
The next options select measurement groups. (See KPI-related measurements for definitions of these groups.)
|bearers||DRB ERAB SRB|
|phy||TB RRU CARR|
These are commands that operate at and above the MAC layer.
enb capture commands
enb scheduler commands
The are commands specific to the scheduler.
enb scheduler stats
This command prints performance statistics for the scheduler, including processing times for UL and DL transport blocks.
Example (from an idle ENB):
> enb scheduler stats
Scheduler subframe starts and abort counts since last restart:
total subframes 61991884
Request aborts 264
PdcchAlloc aborts 0
UeAlloc aborts 0
PdcchSending aborts 5
PdschSending aborts 0
PuschSending aborts 0
total aborted subframes 269 0%
subframes skipped due to late PHY 1130 0%
Scheduled transfer stats since last restart:
UplinkHarqRetires 0 0%
DownlinkHarqRetires 0 0%
DL demand scale 1
UL demand scale 1
UL RB utilization 5.60519e-45
DL RB utilization 0.016713
PDCCH utilization 0.380952
Avg connection life 14 ms
Scheduler latest processing times in microseconds:
PHY Worker Loop ExecTimer stats:
UlRxWorker0: phase List avg 1 us, phase Demod avg 0 us,
UlRxWorker1: phase List avg 1 us, phase Demod avg 0 us,
DlTxWorker0: phase Mod avg 32 us,
DlTxWorker1: phase Mod avg 29 us,
Commands Related to the PHY
This are commands the monitor or control the PHY.
enb phy commands
Commands in the “phy” group operate on lower PHY layer of the ENB.
enb phy radiotest
enb phy simtraffic
This command fills unused resource elements in the DL grid with random QPSK symbols to simulate active DL transmissions. It purpose is to provide test signals for the analog part of the radio system.
To start the simulation:
enb phy simtraffic [fill=pct] [sumframes=]
To stop the simulation:
enb phy simtraffic stop=true
> enb phy simtraffic
Lower phy traffic simulation disabled.
> enb phy simtraffic subframes= 02468
Lower phy traffic simulation enabled on subframes 02468 with fill level 100%.
> enb phy simtraffic fill= 50
Lower phy traffic simulation enabled on subframes 02468 with fill level 50%.
> enb phy simtraffic stop=true
Lower phy traffic simulation disabled.
enb phy printgrid
The printgrid command generates a .png file that shows an image in three parts:
- CSRS – red
- reserved – black
- PSS – yellow
- SSS – green
- PBCH – blue
- PDCCH – orange
- PDSCH – white active, grey unused
- black – no power
- white – maximum allowed power
- black – the quantization noise floor of the eNodeB receiver
- white – the saturation point of the the eNodeB receiver
The file name is based on the Unix epoch time when the file is generated.
This is an example grid image showing a 5 MHz 1×1 configuration. It shows:
enb phy trxstats
The trxstats command gives overall configuration and performance statistics for the lower PHY and the radio interface.
Band 3 EARFCN 1490 (1834000 kHz DL, 1739000 kHz UL)
NID1 3 NID2 1 (PHY-CID 10)
DL Bandwidth 25
PDCCH format 3
PRACH config index 0, 4 preambles, freq offset 0
Connection Pool 0 modems in use, 10 available
enb phy crestfactor
This command shows or sets the crest factor headroom of the OFDM transmitter. (The initial crest factor headroom setting comes from the configuration file and has a default value of 12 dB, but it can be adjusted here in real time for testing.)
> enb phy crestfactor
Crest factor compensation is 10 dB
> enb phy crestfactor dB= 13
Setting crest factor compensation to 13 dB
The example raises the crest factor headroom by 3 dB, which will give a more linear signal, but will also lower the output power by 3 dB.
The theoretical crest factor for LTE OFDMA is 12 dB. Lowering the crest factor headroom allows for higher output power, but also raises the noise level in the transmitter, possibly limiting the useful MCS on DL.
enb phy prach
The prach command is a test feature in the PRACH detector. The form is
enb phy prach oper= <oper>
The allowed operations are:
enb phy forcepucch
The forcepucch command is a test feature that forces PUCCH Format 1 decoding on every subframe for a given RNTI. This force mode stops automatically when the first valid PUCCH Format 1 message is received. The arguments are:
enb phy forcepucch rnti=1234 start=true
enb uepool commands
Commands in the “uepool” group operate on upper PHY layers of the UE connections in the ENB.
enb uepool chans
enb uepool sim
This command is only available in XDEBUG builds.
See MATLAB eNodeB Testing System.