Simple Module CSMAMacLayer

Package: org.mixim.modules.mac
File: modules/mac/CSMAMacLayer.ned

CSMA MAC protocol

Usage diagram:

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Inheritance diagram:

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Extends:

BaseMacLayer (simple module)

Base module for every mac layer module

Used in compound modules:

If a module type shows up more than once, that means it has been defined in more than one NED file.

BaseNic (compound module)	This NIC implements an CSMA network interface card using the CSMAMacLayer module
PhyMacNic (compound module)	(no description)
PhyMacNic (compound module)	(no description)

Parameters:

Name	Type	Default value	Description
notAffectedByHostState	bool	false
coreDebug	bool		debug switch
headerLength	double		length of the MAC packet header (in bits)
debug	bool	false	enable debugging for this module
slotDuration	double		how long is a slot? [s]
difs	double		maximum time between a packet and its ack [s]
maxTxAttempts	double		maximum number of transmission attempts
queueLength	int		length of the MAC queue
defaultChannel	double		default channel
bitrate	double		bit rate [bps]
txPower	double		tx power [mW]
contentionWindow	double		contention window

Properties:

Name	Value	Description
class	CSMAMacLayer

Gates:

Name	Direction	Description
upperGateIn	input	from upper layer
upperGateOut	output	to uppe layer
upperControlIn	input	control from upper layer
upperControlOut	output	control to upper layer
lowerGateIn	input	from lower layer
lowerGateOut	output	to lower layer
lowerControlIn	input	control from lower layer
lowerControlOut	output	control to lower layer

Source code:

//
// CSMA MAC protocol
//
simple CSMAMacLayer extends BaseMacLayer
{
    parameters:
        @class(CSMAMacLayer);
        // enable debugging for this module
        bool debug = default(false);
        // how long is a slot? [s]
        double slotDuration @unit(s);
        // maximum time between a packet and its ack [s]
        double difs @unit(s);
        // maximum number of transmission attempts
        double maxTxAttempts;
        // length of the MAC queue
        int queueLength;
        // default channel 
        double defaultChannel;
        // bit rate [bps]
        double bitrate @unit(bps);
        //tx power [mW]
        double txPower @unit(mW);
        // contention window
        double contentionWindow;
}