GilbertElliotSnr Class Reference
[snrEval - modules for attenuation and interference calculation]

Keeps track of the different snir levels when receiving a packet and switches between states GOOD and BAD (Gilbert-Elliot-Model). More...

#include <GilbertElliotSnr.h>

Inherits SnrEval.

Inheritance diagram for GilbertElliotSnr:

[legend]Collaboration diagram for GilbertElliotSnr:

[legend]List of all members.

Public Member Functions
virtual void	initialize (int)
	Initialize variables and publish the radio status.
virtual void	finish ()
Protected Types
enum	State { GOOD, BAD }
	Gilbert-Elliot state types.
Protected Member Functions
virtual void	handleSelfMsg (cMessage *)
	Handle state change timer.
virtual void	handleLowerMsgStart (AirFrame *)
	Assigns bit errors to all messages.
virtual void	handleLowerMsgEnd (AirFrame *)
	Assigns bit errors to all messages.
Protected Attributes
State	state
	System state.
double	meanGood
	mean value to compute the time the xystem stays in the GOOD state
double	meanBad
	mean value to compute the time the xystem stays in the BAD state
cMessage *	stateChange
	timer to indicate a change of state
Private Member Functions
	Module_Class_Members (GilbertElliotSnr, SnrEval, 0)

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Detailed Description

Keeps track of the different snir levels when receiving a packet and switches between states GOOD and BAD (Gilbert-Elliot-Model).

This module has exactly the same functionality as the SnrEval module, but furthermore it puts a Gilbert-Elliot model on top of the SNIR level computation. This means that it changes between the states GOOD and BAD. If it is in state BAD a received frame will be marked as corrupted.

The Gilbert Elliot model is used to simulate outer system disturbances.

This module should be used in combination with the GilbertElliotDecider moulde which evaluates the snr levels as well as the marked frames.

Author:

Marc Loebbers

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Member Function Documentation

void GilbertElliotSnr::handleLowerMsgEnd (  AirFrame *   )  [protected, virtual]

Assigns bit errors to all messages. A bad state may be so long that it spans several recvBuffers -- this case is caught here. Reimplemented from SnrEval.

void GilbertElliotSnr::handleLowerMsgStart (  AirFrame *   )  [protected, virtual]

Assigns bit errors to all messages. A bad state may be so long that it spans several recvBuffers -- this case is caught here. Reimplemented from SnrEval.

void GilbertElliotSnr::handleSelfMsg (  cMessage *   )  [protected, virtual]

Handle state change timer. Assigns bit errors to all messages currently in the recvBuffer Reimplemented from BasicSnrEval.

void GilbertElliotSnr::initialize (  int  stage  )  [virtual]

Initialize variables and publish the radio status. All values not present in the ned file will be read from the ChannelControl module or assigned default values. Reimplemented from SnrEval.

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The documentation for this class was generated from the following files:

• GilbertElliotSnr.h
• GilbertElliotSnr.cc

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