GaussMarkovMobility¶

simple module GaussMarkovMobility

Uses a Gauss-Markov model to control the randomness in the movement. Totally random walk (Brownian motion) is obtained by setting alpha=0, while alpha=1 results in linear motion.

Inheritance diagram¶

Extends¶

Name	Type	Description
MovingMobilityBase	simple module	Abstract base module for mobility models.

Parameters¶

Name	Type	Default value	Description
displayStringTextFormat	string	“p: {position}\nv: {velocity}”	Determines the text that is written on top of the submodule, supports displaying pars, watches, and module-specific information
subjectModule	string	“^”	The module path that determines the subject module, the motion of which this mobility model describes. The default value is the parent module
coordinateSystemModule	string	“”	The module path of the geographic coordinate system module; optional, empty disables geographic conversion (and the {geo_position} directive)
updateDisplayString	bool	true	Enables continuous update of the subject module’s position by modifying its display string
constraintAreaMinX	double	-inf m	The minimum x position of the constraint area. It is unconstrained by default (negative infinity)
constraintAreaMinY	double	-inf m	The minimum y position of the constraint area. It is unconstrained by default (negative infinity)
constraintAreaMinZ	double	-inf m	The minimum z position of the constraint area. It is unconstrained by default (negative infinity)
constraintAreaMaxX	double	inf m	The maximum x position of the constraint area. It is unconstrained by default (positive infinity)
constraintAreaMaxY	double	inf m	The maximum y position of the constraint area. It is unconstrained by default (positive infinity)
constraintAreaMaxZ	double	inf m	The maximum z position of the constraint area. It is unconstrained by default (positive infinity)
updateInterval	double	0.1s	The simulation time interval used to regularly signal mobility state changes and update the display
faceForward	bool	true
alpha	double	0.5	[0;1], 0 - brownian motion, 1 - linear motion
speed	double
speedStdDev	double		Speed standard deviation
angle	double	uniform(0deg, 360deg)
angleStdDev	double		Angle standard deviation
margin	double

Properties¶

Name	Value	Description
class	GaussMarkovMobility
display	i=block/cogwheel

Signals¶

Name	Type	Unit	Description
mobilityStateChanged	inet::MobilityBase		It works in inet, but not in the extended module in another namespace

Source code¶

//
// Uses a Gauss-Markov model to control the randomness in the movement.
// Totally random walk (Brownian motion) is obtained by setting alpha=0,
// while alpha=1 results in linear motion.
//
simple GaussMarkovMobility extends MovingMobilityBase
{
    parameters:
        @class(GaussMarkovMobility);
        double alpha = default(0.5); // [0;1], 0 - brownian motion, 1 - linear motion
        double speed @unit(mps);
        double speedStdDev @unit(mps);     // Speed standard deviation
        double angle @unit(deg) = default(uniform(0deg, 360deg));
        double angleStdDev @unit(deg);     // Angle standard deviation
        double margin @unit(m);
}

File: src/inet/mobility/single/GaussMarkovMobility.ned