Compound Module SnrNic

File: NetworkInterfaces/MF80211/SnrNic.ned

This is the easiest nic to implement "real" network behaviour. It uses the CsmaMacLayer and the SnrDecider and SnrEval modules.

The csma mac provides basic medium access and is used here to prevent a host from trying to send a message while it is still in receive mode.

The phy layer modules allow to account for collision and take fading into account so that messages can actually be lost.

IMPORTANT:
In order to work with the ChannelControl module the snrEval module has to be called "snrEval" in the ned file.

See also: BasicMacLayer, SnrDecider, SnrEval

Author: Daniel Willkomm

mac: CSMAMacLayer decider: SnrDecider snrEval: SnrEval

Usage diagram:

The following diagram shows usage relationships between modules, networks and channels. Unresolved module (and channel) types are missing from the diagram. Click here to see the full picture.

Contains the following modules:

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

CSMAMacLayer

CSMA MAC protocol

SnrDecider

Decider module to be used with SnrEval

SnrEval (no description)

Gates:

Name Direction Description
uppergateIn input

to upper layers

uppergateOut output

from upper layers

Unassigned submodule parameters:

Name Type Description
mac.debug bool

debug switch

mac.headerLength numeric const
mac.queueLength numeric const
decider.debug bool

debug switch

decider.snrThresholdLevel numeric
snrEval.debug bool

debug switch

snrEval.transmitterPower numeric
snrEval.bitrate numeric
snrEval.headerLength numeric const
snrEval.carrierFrequency numeric
snrEval.thermalNoise numeric
snrEval.pathLossAlpha numeric
snrEval.sensitivity numeric

Source code:

module SnrNic
    gates:
        in: uppergateIn; // to upper layers
        out: uppergateOut; // from upper layers
    submodules:
        mac: CSMAMacLayer;
            display: "p=60,50;b=32,30;i=prot2";
        decider: SnrDecider;
            display: "p=68,100;b=16,16;i=box2_s;o=white";
        snrEval: SnrEval;
            display: "p=60,150;b=32,30;i=prot3";
    connections:
        decider.uppergateOut --> mac.lowergateIn display "m=m,50,50,75,0";
        snrEval.uppergateIn <-- mac.lowergateOut display "m=m,25,0,25,0";
        snrEval.uppergateOut --> decider.lowergateIn display "m=m,73,0,50,50";

        mac.uppergateOut --> uppergateOut;
        mac.uppergateIn <-- uppergateIn;

    display: "p=10,10;b=101,180,rect;o=white";
endmodule