C++ definition

Implements frame retransmission and recovery procedures for QoS frames in IEEE 802.11 networks. Manages retry counters for failed transmissions, adjusts contention window size, and enforces retry limits. Maintains separate short and long retry counters based on frame size relative to RTS threshold, and tracks per-TID frame status to support Quality of Service requirements.

<b>See also:</b> IRtsPolicy, Dcaf, Edcaf

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
cwCalculatorModule	string
rtsPolicyModule	string
shortRetryLimit	int	7
longRetryLimit	int	4

Properties

Name	Value	Description
class	QosRecoveryProcedure
display	i=block/cogwheel

Signals

Name	Type	Unit	Description
contentionWindowChanged	long
retryLimitReached	inet::Packet

Statistics

Name	Title	Source	Record	Unit	Interpolation Mode	Description
contentionWindowChanged	contention window		vector		sample-hold
retryLimitReached	retry limit reached		count

Source code

//
// Implements frame retransmission and recovery procedures for QoS frames in IEEE
// 802.11 networks. Manages retry counters for failed transmissions, adjusts
// contention window size, and enforces retry limits. Maintains separate short and
// long retry counters based on frame size relative to RTS threshold, and tracks
// per-TID frame status to support Quality of Service requirements.
//
// @see IRtsPolicy, Dcaf, Edcaf
//
simple QosRecoveryProcedure extends SimpleModule
{
    parameters:
        @class(QosRecoveryProcedure);
        string cwCalculatorModule;
        string rtsPolicyModule;

        int shortRetryLimit = default(7);
        int longRetryLimit = default(4);
        @display("i=block/cogwheel");
        @signal[contentionWindowChanged](type=long);
        @signal[retryLimitReached](type=inet::Packet);
        @statistic[contentionWindowChanged](title="contention window"; record=vector; interpolationmode=sample-hold);
        @statistic[retryLimitReached](title="retry limit reached"; record=count);
}

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

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