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/*
* Copyright (c) 2009 MIRKO BANCHI
*
* SPDX-License-Identifier: GPL-2.0-only
*
* Author: Mirko Banchi <mk.banchi@gmail.com>
*/
/**
* This is a simple example in order to show how 802.11n compressed block ack mechanism could be
* used.
*
* Network topology:
*
* Wifi 192.168.1.0
*
* AP
* * *
* | |
* n1 n2
*
* In this example a QoS sta sends UDP datagram packets to access point. On the access point
* there is no application installed so it replies to every packet with an ICMP frame. However
* our attention is on originator sta n1. We have set blockAckThreshold (minimum number of packets
* to use block ack) to 2 so if there are in the BestEffort queue more than 2 packets a block ack
* will be negotiated. We also set a timeout for block ack inactivity to 3 blocks of 1024
* microseconds. This timer is reset when:
* - the originator receives a block ack frame.
* - the recipient receives a block ack request or a MPDU with ack policy Block Ack.
*/
#include "ns3/boolean.h"
#include "ns3/command-line.h"
#include "ns3/double.h"
#include "ns3/internet-stack-helper.h"
#include "ns3/ipv4-address-helper.h"
#include "ns3/ipv4-global-routing-helper.h"
#include "ns3/log.h"
#include "ns3/mobility-helper.h"
#include "ns3/mobility-model.h"
#include "ns3/on-off-helper.h"
#include "ns3/rectangle.h"
#include "ns3/ssid.h"
#include "ns3/string.h"
#include "ns3/uinteger.h"
#include "ns3/yans-wifi-channel.h"
#include "ns3/yans-wifi-helper.h"
using namespace ns3;
NS_LOG_COMPONENT_DEFINE("Test-block-ack");
int
main(int argc, char* argv[])
{
CommandLine cmd(__FILE__);
cmd.Parse(argc, argv);
LogComponentEnable("QosTxop", LOG_LEVEL_DEBUG);
LogComponentEnable("BlockAckManager", LOG_LEVEL_INFO);
Ptr<Node> sta = CreateObject<Node>();
Ptr<Node> ap = CreateObject<Node>();
YansWifiChannelHelper channel = YansWifiChannelHelper::Default();
YansWifiPhyHelper phy;
phy.SetPcapDataLinkType(WifiPhyHelper::DLT_IEEE802_11_RADIO);
phy.SetChannel(channel.Create());
WifiHelper wifi;
wifi.SetStandard(WIFI_STANDARD_80211n);
WifiMacHelper mac;
/* disable fragmentation */
wifi.SetRemoteStationManager("ns3::IdealWifiManager",
"FragmentationThreshold",
UintegerValue(2500));
Ssid ssid("My-network");
mac.SetType("ns3::StaWifiMac",
"QosSupported",
BooleanValue(true),
"Ssid",
SsidValue(ssid),
/* setting blockack threshold for sta's BE queue */
"BE_BlockAckThreshold",
UintegerValue(2),
/* setting block inactivity timeout to 3*1024 = 3072 microseconds */
"BE_BlockAckInactivityTimeout",
UintegerValue(3));
NetDeviceContainer staDevice = wifi.Install(phy, mac, sta);
mac.SetType("ns3::ApWifiMac",
"QosSupported",
BooleanValue(true),
"Ssid",
SsidValue(ssid),
"BE_BlockAckThreshold",
UintegerValue(0));
NetDeviceContainer apDevice = wifi.Install(phy, mac, ap);
/* Setting mobility model */
MobilityHelper mobility;
mobility.SetPositionAllocator("ns3::GridPositionAllocator",
"MinX",
DoubleValue(0.0),
"MinY",
DoubleValue(0.0),
"DeltaX",
DoubleValue(5.0),
"DeltaY",
DoubleValue(10.0),
"GridWidth",
UintegerValue(3),
"LayoutType",
StringValue("RowFirst"));
mobility.SetMobilityModel("ns3::RandomWalk2dMobilityModel",
"Bounds",
RectangleValue(Rectangle(-50, 50, -50, 50)));
mobility.Install(sta);
mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");
mobility.Install(ap);
/* Internet stack*/
InternetStackHelper stack;
stack.Install(sta);
stack.Install(ap);
Ipv4AddressHelper address;
address.SetBase("192.168.1.0", "255.255.255.0");
Ipv4InterfaceContainer staIf;
Ipv4InterfaceContainer apIf;
staIf = address.Assign(staDevice);
apIf = address.Assign(apDevice);
/* Setting applications */
uint16_t port = 9;
DataRate dataRate("1Mb/s");
OnOffHelper onOff("ns3::UdpSocketFactory",
Address(InetSocketAddress(apIf.GetAddress(0), port)));
onOff.SetAttribute("DataRate", DataRateValue(dataRate));
onOff.SetAttribute("OnTime", StringValue("ns3::ConstantRandomVariable[Constant=0.01]"));
onOff.SetAttribute("OffTime", StringValue("ns3::ConstantRandomVariable[Constant=8]"));
onOff.SetAttribute("PacketSize", UintegerValue(50));
ApplicationContainer staApps = onOff.Install(sta);
staApps.Start(Seconds(1));
staApps.Stop(Seconds(10));
Ipv4GlobalRoutingHelper::PopulateRoutingTables();
Simulator::Stop(Seconds(10));
phy.EnablePcap("test-blockack", ap->GetId(), 0);
Simulator::Run();
Simulator::Destroy();
return 0;
}
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