User guide

Chapter 11: Channel simulator 35
11.2 UE parameters
When the UE channel simulator is enabled (channel_sim = true), the following UE parameters
must be provided (see lteue.pdf file for more details):
• position
• initial radius
• speed
• direction
• noise spd
• channel
Those parameters can be set manually in the ue.cg file or configured automatically with the
WebGui as described below.
Scenario creation through WebGui is the easiest way to simulate noise and mobility. Based
on input parameters, WebGui will generate a random scenario and static channel simulation
parameters.
However, if you need to get deeper control of UE position, speed and direction or set specific
path loss parameters, you can set the initial value of UE list parameters in the ue.cfg file (See
[example of ue list cfg file], page 36) and use the remote API as described below to move the
UE position.
11.3 Channel simulation scenario using WebGui
The WebGui (ltewww) provides options to create scenario including channel simulation.
WebGui interface :
To activate channel simulation through WebGui :
• Select Channel type = Additive white Gaussian noise
• Set Min distance: minimum allowed distance from coordinates [0,0] in meters.
• Set Max distance: maximum allowed distance from coordinates [0,0] in meters.
• Set Speed: UE speed in km/h.
• Set Noise spectral density in dBm/Hz : define Noise density (default value is -174).
Note that UE will be randomly placed inside the ring delimited by minimum and maximum
distance
Example :
Let’s define the same values as the picture above :
• Channel type = Additive white Gaussian noise