Low Throughput for Wireless Network with TCP

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Shahrukh Khan Kasi

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20 de ago. de 2019, 11:39:5620/08/2019

para OMNeT++ Users

Hi,

I have simulated a wireless network scenario in which hosts transmit data to a specfic server using FTP. I am using bitrate of 12Mbps for the network, yet at best the maximum throughput achieved is around 1.5Mbps. Can anyone please guide me what is it that I am doing wrong?

I am attaching the ned, ini and xml files below:

.ned Script:

import inet.networklayer.configurator.ipv4.Ipv4NetworkConfigurator;

import inet.node.inet.Router;

import inet.node.inet.WirelessHost;

import inet.node.wireless.AccessPoint;

import inet.physicallayer.ieee80211.packetlevel.Ieee80211ScalarRadioMedium;

import inet.visualizer.contract.IIntegratedVisualizer;

network Wirelesscongestion

{

@display("bgb=800,400");

submodules:

visualizer: <default("IntegratedCanvasVisualizer")> like IIntegratedVisualizer if hasVisualizer() {

parameters:

@display("p=50,103;is=s");

}

radioMedium: Ieee80211ScalarRadioMedium {

parameters:

@display("p=49,59;is=s");

}

configurator: Ipv4NetworkConfigurator {

parameters:

@display("p=50,17;is=s");

}

Host1: WirelessHost {

parameters:

@display("p=230,100");

}

Host2: WirelessHost {

parameters:

@display("p=230,160");

}

Host3: WirelessHost {

parameters:

@display("p=230,220");

}

Host4: WirelessHost {

parameters:

@display("p=230,280");

}

ap1: AccessPoint {

parameters:

@display("p=310,190");

}

router: Router {

parameters:

@display("p=410,190");

}

ap2: AccessPoint {

parameters:

@display("p=510,190");

}

Server1: WirelessHost {

parameters:

@display("p=590,100");

}

Server2: WirelessHost {

parameters:

@display("p=590,160");

}

Server3: WirelessHost {

parameters:

@display("p=590,220");

}

Server4: WirelessHost {

parameters:

@display("p=590,280");

}

.ini Script:

[General]

network = Wirelesscongestion

sim-time-limit = 1000s

record-eventlog = true

#debug-on-errors = true

**.vector-recording = true

*.*.ipv4.arp.typename = "GlobalArp"

# mobility

**.constraintAreaMinX = 0m

**.constraintAreaMinY = 0m

**.constraintAreaMinZ = 0m

**.constraintAreaMaxX = 800m

**.constraintAreaMaxY = 400m

**.constraintAreaMaxZ = 0m

# analog model

**.analogModel.ignorePartialInterference = true

# access point configuration

*.ap1.wlan[0].address = "001111111111"

*.ap1.wlan[0].radio.channelNumber = 0

*.ap2.wlan[0].address = "002222222222"

*.ap2.wlan[0].radio.channelNumber = 1

# router is associated with both AP's using two different radios

*.router*.numWlanInterfaces = 2

*.router*.wlan[0].mgmt.accessPointAddress = "001111111111"

*.router*.wlan[0].radio.channelNumber = 0

*.router*.wlan[1].mgmt.accessPointAddress = "002222222222"

*.router*.wlan[1].radio.channelNumber = 1

# Hosts are associated with AP1 on channel 0

**.Host*.wlan[0].mgmt.accessPointAddress = "001111111111"

**.Host*.wlan[0].radio.channelNumber = 0

# Servers are associated with AP2 on channel 1

**.Server*.wlan[0].mgmt.accessPointAddress = "002222222222"

**.Server*.wlan[0].radio.channelNumber = 1

# use simplified ieee802.11 management (no association, authentication etc.)

**.Host*.**.mgmt.typename = "Ieee80211MgmtStaSimplified"

**.Host*.**.agent.typename = ""

**.Server*.**.mgmt.typename = "Ieee80211MgmtStaSimplified"

**.Server*.**.agent.typename = ""

*.router*.**.mgmt.typename = "Ieee80211MgmtStaSimplified"

*.router*.**.agent.typename = ""

*.ap*.**.mgmt.typename = "Ieee80211MgmtApSimplified"

# global data rates

*.*.wlan[*].bitrate = ${bitrate = 12}Mbps

# tcp apps

**.Host*.numApps = 1

**.Host*.app[*].typename = "TcpSessionApp" # ftp

**.Host*.app[0].active = true

**.Host*.app[0].localPort = -1

**.Host1.app[0].localAddress = "Host1"

**.Host2.app[0].localAddress = "Host2"

**.Host3.app[0].localAddress = "Host3"

**.Host4.app[0].localAddress = "Host4"

**.Host1.app[0].connectAddress = "Server1"

**.Host2.app[0].connectAddress = "Server2"

**.Host3.app[0].connectAddress = "Server3"

**.Host4.app[0].connectAddress = "Server4"

**.Host*.app[0].connectPort = 1000

**.Host*.app[0].tOpen = exponential(0.1s)

**.Host*.app[0].tSend = 0s

**.Host1.app[0].sendBytes = ${packetLength1 = 4000000}byte

**.Host2.app[0].sendBytes = ${packetLength2 = 2000000}byte

**.Host3.app[0].sendBytes = ${packetLength3 = 1000000}byte

**.Host4.app[0].sendBytes = ${packetLength4 = 1000000}byte

**.Host*.app[0].tClose = 0s

**.Host1.app[0].sendInterval = ${packetLength1} * 8 / ${bitrate} * 1us

**.Host2.app[0].sendInterval = ${packetLength2} * 8 / ${bitrate} * 1us

**.Host3.app[0].sendInterval = ${packetLength3} * 8 / ${bitrate} * 1us

**.Host4.app[0].sendInterval = ${packetLength4} * 8 / ${bitrate} * 1us

**.Host*.sendScript = ""

**.Server*.numApps = 1

**.Server*.app[*].typename = "TcpSinkApp"

**.Server*.app[0].localPort = 1000

**.Server*.app[0].localAddress = ""

# tcp settings

**.app[*].dataTransferMode = "object"

# Network configuration

*.configurator.config = xmldoc("network.xml")

# Radio configuration

**.wlan[*].radio.transmitter.power = 0.485mW

**.wlan[*].radio.displayCommunicationRange = true

**.wlan[*].radio.transmitter.bitrate = 12Mbps

**.wlan[*].radio.transmitter.communicationRange = 80m

**.wlan[*].radio.transmitter.interferenceRange = 0m

**.wlan[*].radio.transmitter.detectionRange = 0m

**.radioMedium.rangeFilter = "communicationRange"

# NIC configuration

**.ppp[*].queue.typename = "DropTailQueue" # in routers

**.ppp[*].queue.frameCapacity = 10 # in routers

.xml Script:

<!--

-->

</config>

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