This module implements a trivial MAC protocol for use in ~AckingWirelessInterface.

The implementation provides packet encapsulation and decapsulation, but it doesn't have a real medium access protocol. It doesn't provide carrier sense mechanism, collision avoidance, collision detection, but it provides optional out-of-band acknowledgement. Higher layer packets should have MacAddressReq tag.

See ~AckingWirelessInterface for rationale and details.

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
AckingWirelessInterface	compound module	This module implements a highly abstracted wireless network interface (NIC) that uses a trivial MAC protocol. It offers simplicity for scenarios where Layer 1 and 2 effects can be completely ignored, for example testing the basic functionality of a wireless ad-hoc routing protocol.
Ieee802154UwbIrInterface	compound module	This module implements an IEEE 802.15.4 UWB-IR network interface.

Extends

Name	Type	Description
MacProtocolBase	simple module	Module base for different MAC protocols.

Parameters

Name	Type	Default value	Description
interfaceTableModule	string
address	string	"auto"	MAC address as hex string (12 hex digits), or "auto". "auto" values will be replaced by a generated MAC address in init stage 0.
bitrate	double
mtu	int	4470B
headerLength	int	16B	AckingMacHeader length
promiscuous	bool	false
fullDuplex	bool	true	allows transmitting and receiving simultaneously (transceiver radio mode)
useAck	bool	true
ackTimeout	double	100ms

Properties

Name	Value	Description
display	i=block/rxtx
class	AckingMac

Gates

Name	Direction	Size	Description
upperLayerIn	input
upperLayerOut	output
lowerLayerIn	input
lowerLayerOut	output

Signals

Name	Type	Unit
linkBroken	inet::Packet

Statistics

Name	Title	Source	Record	Unit	Interpolation Mode
passedUpPk	packets passed to higher layer	packetSentToUpper	count, sum(packetBytes), vector(packetBytes)		none
rcvdPkFromHl	packets received from higher layer	packetReceivedFromUpper	count, sum(packetBytes), vector(packetBytes)		none
packetDropInterfaceDown	packet drop: interface down	packetDropReasonIsInterfaceDown(packetDropped)	count, sum(packetBytes), vector(packetBytes)		none
packetDropNotAddressedToUs	packet drop: not addressed to us	packetDropReasonIsNotAddressedToUs(packetDropped)	count, sum(packetBytes), vector(packetBytes)		none
sentDownPk	packets sent to lower layer	packetSentToLower	count, sum(packetBytes), vector(packetBytes)		none
linkBroken	link break	linkBroken	count		none
rcvdPkFromLl	packets received from lower layer	packetReceivedFromLower	count, sum(packetBytes), vector(packetBytes)		none
packetDropIncorrectlyReceived	packet drop: incorrectly received	packetDropReasonIsIncorrectlyReceived(packetDropped)	count, sum(packetBytes), vector(packetBytes)		none

Source code

//
// This module implements a trivial MAC protocol for use in ~AckingWirelessInterface.
//
// The implementation provides packet encapsulation and decapsulation, but it
// doesn't have a real medium access protocol. It doesn't provide carrier sense
// mechanism, collision avoidance, collision detection, but it provides optional
// out-of-band acknowledgement. Higher layer packets should have MacAddressReq
// tag.
//
// See ~AckingWirelessInterface for rationale and details.
//
module AckingMac extends MacProtocolBase like ILinkLayer, IMacProtocol
{
    parameters:
        string address @mutable = default("auto");   // MAC address as hex string (12 hex digits), or
                                                     // "auto". "auto" values will be replaced by
                                                     // a generated MAC address in init stage 0.
        double bitrate @unit(bps);
        int mtu @unit(B) = default(4470B);
        int headerLength @unit(B) = default(16B); // AckingMacHeader length
        bool promiscuous = default(false);
        bool fullDuplex = default(true);    // allows transmitting and receiving simultaneously (transceiver radio mode)
        bool useAck = default(true);
        double ackTimeout @unit(s) = default(100ms);

        @class(AckingMac);
        @signal[linkBroken](type=inet::Packet);
        @statistic[linkBroken](title="link break"; source=linkBroken; record=count; interpolationmode=none);
        @statistic[passedUpPk](title="packets passed to higher layer"; source=packetSentToUpper; record=count,"sum(packetBytes)","vector(packetBytes)"; interpolationmode=none);
        @statistic[sentDownPk](title="packets sent to lower layer"; source=packetSentToLower; record=count,"sum(packetBytes)","vector(packetBytes)"; interpolationmode=none);
        @statistic[rcvdPkFromHl](title="packets received from higher layer"; source=packetReceivedFromUpper; record=count,"sum(packetBytes)","vector(packetBytes)"; interpolationmode=none);
        @statistic[rcvdPkFromLl](title="packets received from lower layer"; source=packetReceivedFromLower; record=count,"sum(packetBytes)","vector(packetBytes)"; interpolationmode=none);
        @statistic[packetDropIncorrectlyReceived](title="packet drop: incorrectly received"; source=packetDropReasonIsIncorrectlyReceived(packetDropped); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetDropInterfaceDown](title="packet drop: interface down"; source=packetDropReasonIsInterfaceDown(packetDropped); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
        @statistic[packetDropNotAddressedToUs](title="packet drop: not addressed to us"; source=packetDropReasonIsNotAddressedToUs(packetDropped); record=count,sum(packetBytes),vector(packetBytes); interpolationmode=none);
}

File: src/inet/linklayer/acking/AckingMac.ned

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