Decider80211 Class Reference
[decider - decider modules]

Decider for the 802.11 modules. More...

#include <Decider80211.h>

Inherits BasicLayer.

Inheritance diagram for Decider80211:

[legend]Collaboration diagram for Decider80211:

[legend]List of all members.

Public Member Functions
virtual void	initialize (int)
	Initialization of the module and some variables.
Protected Member Functions
virtual void	handleLowerMsg (cMessage *msg)
	Check whether we received the packet correctly. Also appends the PhyControlInfo.
virtual void	handleUpperMsg (cMessage *msg)
	This function should not be called.
virtual void	handleSelfMsg (cMessage *msg)
	Handle self messages such as timer...
virtual void	handleLowerControl (cMessage *msg)
	Handle control messages from lower layer Just cut them through.
double	dB2fraction (double)
	converts a dB value into a normal fraction
bool	packetOk (double, int, double bitrate)
	computes if packet is ok or has errors
Protected Attributes
double	bitrate
	should be set in the omnetpp.ini
double	snirThreshold
	should be set in the omnetpp.ini; everthing below this threshold can't be read and is therefor considered as a collision
Private Member Functions
	Module_Class_Members (Decider80211, BasicLayer, 0)

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Detailed Description

Decider for the 802.11 modules.

Depending on the minimum of the snr included in the PhySDU this module computes a bit error probability. The header (1 Mbit/s) is always modulated with DBQPSK. The PDU is normally modulated either with DBPSK (1 and 2 Mbit/s) or CCK (5.5 and 11 Mbit/s). CCK is not easy to model, therefore it is modeled as DQPSK with a 16-QAM for 5.5 Mbit/s and a 256-QAM for 11 Mbit/s.

Author:

Marc Löbbers, David Raguin

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Member Function Documentation

void Decider80211::handleLowerMsg (  cMessage *  m  )  [protected, virtual]

Check whether we received the packet correctly. Also appends the PhyControlInfo. Handle message from lower layer. The minimal snir is read in and it is computed wether the packet has collided or has bit errors or was received correctly. The corresponding kind is set and it is handed on to the upper layer. Implements BasicLayer.

void Decider80211::initialize (  int  stage  )  [virtual]

Initialization of the module and some variables. First we have to initialize the module from which we derived ours, in this case BasicDecider. This decider also needs the bitrate and some 802.11 parameters are initialized Reimplemented from BasicLayer.

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

• Decider80211.h
• Decider80211.cc

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