This module implements a lightweight model for 4G or 5G User Equipment (UE). It is used to simulate the generation of background traffic in both uplink and downlink bandwidths, according to the logic specified by its ITrafficGenerator submodule. The generated traffic is not actually transmitted or received by this module, making it more efficient from a simulation complexity perspective. Instead, such traffic modifies the buffer status information that is used by the BackgroundScheduler to allocate resources. Each background UE has a mobility submodule to configure its position in the simulation floor plan. This allows for realistic channel status information to be computed for the background UE and used by the BackgroundScheduler. Since this module does not send or receive actual traffic, application-level statistics are not produced.

Usage diagram

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

Used in compound modules

Name	Type	Description
BackgroundTrafficGenerator	compound module	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.

Parameters

Name	Type	Default value	Description
computeAvgInterference	bool
enablePeriodicCqiUpdate	bool
useProbabilisticCqi	bool

Properties

Name	Value	Description
display	i=device/pocketpc

Source code

//
// This module implements a lightweight model for 4G or 5G User Equipment (UE).
// It is used to simulate the generation of background traffic in both uplink and
// downlink bandwidths, according to the logic specified by its ~ITrafficGenerator
// submodule. The generated traffic is not actually transmitted or received by this module,
// making it more efficient from a simulation complexity perspective.
// Instead, such traffic modifies the buffer status information that is used by the
// ~BackgroundScheduler to allocate resources.
// Each background UE has a mobility submodule to configure its position in the
// simulation floor plan. This allows for realistic channel status information to be
// computed for the background UE and used by the ~BackgroundScheduler.
// Since this module does not send or receive actual traffic, application-level
// statistics are not produced.
//
module BackgroundUe
{
    parameters:
        @display("i=device/pocketpc");
        bool computeAvgInterference;
        bool enablePeriodicCqiUpdate;
        bool useProbabilisticCqi;
        *.computeAvgInterference = this.computeAvgInterference;
        *.enablePeriodicCqiUpdate = this.enablePeriodicCqiUpdate;
        *.useProbabilisticCqi = this.useProbabilisticCqi;
    submodules:
        mobility: <default("StationaryMobility")> like IMobility if typename != "" {
            @display("p=57,61;is=s");
        }
        generator: <default("TrafficGeneratorBase")> like ITrafficGenerator {
            @display("p=142,61;is=s");
        }
}

File: src/stack/backgroundTrafficGenerator/BackgroundUe.ned

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