C++ definition

Implements the Transmission Opportunity (TXOP) mechanism in IEEE 802.11 QoS networks. Manages TXOP periods during which a station has the right to transmit. Tracks TXOP limits based on access category (AC) and PHY mode. Supports both single and multiple protection mechanisms to protect frame exchanges during the TXOP.

Inheritance diagram

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the diagram.

Used in compound modules

Name	Type	Description
Edcaf	compound module	Implements EDCAF (Enhanced Distributed Channel Access Function) for IEEE 802.11. EDCAF represents one access category within EDCA.

Extends

Name	Type	Description
SimpleModule	simple module	Base module for all INET simple modules.

Parameters

Name	Type	Default value	Description
displayStringTextFormat	string	""	Determines the text that is written on top of the submodule, supports displaying pars, watches, and module-specific information
txopLimit	double	-1s

Properties

Name	Value	Description
class	TxopProcedure
display	i=block/timer

Signals

Name	Type	Unit	Description
txopEnded
txopStarted

Statistics

Name	Title	Source	Record	Unit	Interpolation Mode	Description
txopDuration	txop duration	txopDuration(txopEnded)	histogram, vector?		none
txopEnded	txops ended	txopEnded	count, vector?		none
txopActive	txop active	warmup(count(txopStarted)-count(txopEnded))	vector		sample-hold

Source code

//
// Implements the Transmission Opportunity (TXOP) mechanism in IEEE 802.11 QoS
// networks. Manages TXOP periods during which a station has the right to transmit. 
// Tracks TXOP limits based on access category (AC) and PHY mode. Supports both single
// and multiple protection mechanisms to protect frame exchanges during the TXOP.
//
simple TxopProcedure extends SimpleModule
{
    parameters:
        @class(TxopProcedure);
        double txopLimit @unit(s) = default(-1s);
        @display("i=block/timer");
        @signal[txopStarted](inet::ieee80211::TxopProcedure);
        @signal[txopEnded](inet::ieee80211::TxopProcedure);
        @statistic[txopEnded](title="txops ended"; source=txopEnded; record=count,vector?; interpolationmode=none);
        @statistic[txopDuration](title="txop duration"; source=txopDuration(txopEnded); record=histogram,vector?; interpolationmode=none);
        @statistic[txopActive](title="txop active"; source=warmup(count(txopStarted)-count(txopEnded)); record=vector; interpolationmode=sample-hold; autoWarmupFilter=false);
}

File: src/inet/linklayer/ieee80211/mac/originator/TxopProcedure.ned

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