C++ definition

Implements frame retransmission and recovery procedures for non-QoS frames in IEEE 802.11 networks. Manages short and long retry counters, adjusts contention window size based on transmission outcomes, and enforces retry limits. Handles different retry procedures for frames below and above the RTS threshold as specified in IEEE 802.11 standard section 9.19.2.6.

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

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
Dcf	compound module	Implements the DCF (Distributed Coordination Function) for IEEE 802.11.
Edca	compound module	Implements EDCA (Enhanced Distributed Channel Access) for IEEE 802.11. The implementation allows for a configurable number of access categories, not just four as defined by the standard.

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	NonQosRecoveryProcedure
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 non-QoS frames in
// IEEE 802.11 networks. Manages short and long retry counters, adjusts contention
// window size based on transmission outcomes, and enforces retry limits. Handles
// different retry procedures for frames below and above the RTS threshold as
// specified in IEEE 802.11 standard section 9.19.2.6.
//
// @see IRtsPolicy, Dcaf
//
simple NonQosRecoveryProcedure extends SimpleModule
{
    parameters:
        @class(NonQosRecoveryProcedure);
        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/NonQosRecoveryProcedure.ned

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