User guide

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5 Initial setting
5.1 Selection of configuration file
The default file used by LTE automatic service is ue.cfg (available under /root/ue/config
directory). This files aims to configure the UE simulator parameters such as UE category,
EARFCN, IMSI and others.
To change the UE configuration, update this file and restart the LTE service with service lte
restart command.
Note: Some examples of configuration file (ue-nbiot.cfg, ue-catm1.cfg) are provided in Amarisoft
releases as a starting point.
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To quickly swap between different configuration, you can stop the automatic service using
service lte stop command and run manually the command line ./lteue config/xxx.cfg
under /root/ue directory.
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5.2 Frequency and bandwidth configuration
Once configuration file has been selected, frequency and bandwidth must be set to match eN-
odeB/gNodeB setting as both parameters are static at UE simulator side.
The parameters to be changed are:
• dl earfcn
• bandwidth
5.3 Multiple cells configuration
When multiple cells are configured at network side, each of them must be declared in cell_
groups parameter.
A cell groups references the configuration of 1 or more cells of the same type (LTE, Cat-M1,
NB-IoT, or 5G NR). See lteue.pdf for more details
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Note: Cells within same group must be synchronized at subframe/frame level.
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5.3.1 Example : 2 LTE cells from two different eNodeB
The example below represents a scenario with 2 cells from two different eNodeB (not syn-
chonized)
cell_groups: [{
group_type: "lte",
multi_ue: true,
cells: [{
rf_port: 0,
bandwidth: 20,
dl_earfcn: 6300,
n_antenna_dl: 1,
n_antenna_ul: 1,
}]
}, {
group_type: "lte",