This module is part of a BackgroundCell module and is responsible for instantiating a configurable number of background UEs (see BackgroundUe module) and setting up their method for computing the channel status information required by the BackgroundScheduler module.

Usage diagram

The following diagram shows usage relationships between types. Unresolved types are missing from the diagram.

Used in compound modules

Name	Type	Description
BackgroundCell	compound module	This module implements a lightweight model for a 4G eNodeB or 5G gNodeB. It is used to generate configurable inter-cell interference in the simulated network. Compared to the eNodeB and gNodeB modules, this module occupies time-frequency resources in both the uplink and downlink bandwidth without simulating the actual transmission or reception of data packets to or from User Equipments (UEs). Therefore, it is significantly more efficient from a simulation speed perspective. To achieve this, it includes a BackgroundTrafficGenerator to customize the level of background traffic to be simulated, a BackgroundChannelModel to configure channel parameters, and a BackgroundScheduler that manages the allocation of time-frequency resources based on the traffic generator. Note that this module can generate interference on only one Component Carrier, as configured in the BackgroundScheduler module. To produce interference across multiple carriers, it is possible to use multiple instances of this module, each configured with the desired carrier frequency.
LteNicEnb	compound module	The LteNicEnb module is a network interface that provides LTE connectivity within an eNodeB. It implements the data and signaling planes of the LTE stack, which includes the PDCP, RLC, MAC, and PHY layers. The parameters and submodules allow customization of the eNodeB's behavior, including whether it supports D2D communication, CoMP (Coordinated MultiPoint), or dual connectivity.

Parameters

Name	Type	Default value	Description
numBgUes	int	0
enablePeriodicCqiUpdate	bool	true
useProbabilisticCqi	bool	false
computeAvgInterference	bool	false

Properties

Name	Value	Description
display	i=block/source

Source code

//
// This module is part of a ~BackgroundCell module and is responsible for instantiating a
// configurable number of background UEs (see ~BackgroundUe module) and setting up
// their method for computing the channel status information required by the
// ~BackgroundScheduler module.
//
module BackgroundTrafficGenerator
{
    parameters:
        @display("i=block/source");
        int numBgUes = default(0);
        bool enablePeriodicCqiUpdate = default(true);
        bool useProbabilisticCqi = default(false);
        bool computeAvgInterference = default(false);
        *.computeAvgInterference = this.computeAvgInterference;
        *.enablePeriodicCqiUpdate = this.enablePeriodicCqiUpdate;
        *.useProbabilisticCqi = this.useProbabilisticCqi;
        *.numBgUes = this.numBgUes;

    submodules:
        bgUE[numBgUes]: BackgroundUe {
            @display("p=77,118");
        }
        manager: <default("BackgroundTrafficManager")> like IBackgroundTrafficManager {
            @display("p=77,41");
        }
}

File: src/stack/backgroundTrafficGenerator/BackgroundTrafficGenerator.ned

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