wirelessNetworkSimulator
Download Required: To use wirelessNetworkSimulator
,
first download the Communications Toolbox Wireless Network Simulation Library add-on.
Description
The wirelessNetworkSimulator
object simulates different
wireless network scenarios with different types of wireless nodes. Use the Object Functions to add nodes
to the simulator, interact with the nodes, schedule actions to perform during simulation, plug
in custom channel models, and run simulations.
Creation
Description
creates a networkSimulator
= wirelessNetworkSimulator.initwirelessNetworkSimulator
object with default property values.
If the wirelessNetworkSimulator
object
networkSimulator
already exists in the MATLAB® workspace, the function resets the object to its default state.
Note
By default, the wireless network simulator supports single-input single-output
(SISO) scenarios. To simulate scenarios other than SISO, you must add a channel model
by using the addChannelModel
function.
Properties
CurrentTime
— Current simulation time
0
(default) | nonnegative scalar
This property is read-only.
Current simulation time, stored as a nonnegative scalar. Units are in seconds.
Data Types: double
ChannelFunction
— Channel model
"fspl"
(default) | function handle
This property is read-only.
Channel model, stored as a function handle. By default, the simulator uses the
fspl
function to model the channel. To
specify a custom channel model, use the addChannelModel
function.
Data Types: function_handle
EndTime
— Simulation end time
0
(default) | nonnegative scalar
This property is read-only.
Simulation end time, stored as a nonnegative scalar. Units are in seconds.
Data Types: double
Nodes
— Nodes added to simulator
cell array
This property is read-only.
Nodes added to the simulator, stored as a cell array, where each cell contains a
bluetoothLENode
(Bluetooth Toolbox) object, bluetoothNode
(Bluetooth Toolbox) object, wlanNode
(WLAN Toolbox) object, nrGNB
(5G Toolbox) object, or
nrUE
(5G Toolbox)
object.
Object Functions
wirelessNetworkSimulator.getInstance | Get instance of wirelessNetworkSimulator object |
addNodes | Add nodes to simulator |
addChannelModel | Add custom channel or path loss model |
scheduleAction | Schedule action to perform during simulation |
cancelAction | Cancel scheduled action |
run | Run simulation |
Examples
Simulate Bluetooth BR Network with Default Channel Effects
Create a wirelessNetworkSimulator
object by using the wirelessNetworkSimulator.init()
function. By default, the wirelessNetworkSimulator
object applies free-space path loss model for the channel effects.
networkSimulator = wirelessNetworkSimulator.init();
Create two Bluetooth BR nodes, one with the "central"
role and other with the "peripheral"
role. Specify the position of the Peripheral node in meters.
centralNode = bluetoothNode("central"); peripheralNode = bluetoothNode("peripheral",Position=[1 0 0]);
Create a default Bluetooth BR connection configuration object to configure and share a connection between Bluetooth BR Central and Peripheral nodes.
cfgConnection = bluetoothConnectionConfig;
Configure connection between the Central and the Peripheral nodes.
connection = configureConnection( ...
cfgConnection,centralNode,peripheralNode);
Create and configure a networkTrafficOnOff
object to generate an On-Off application traffic pattern.
traffic = networkTrafficOnOff( ... DataRate=200, ... PacketSize=27, ... GeneratePacket=true, ... OnTime=inf);
Add application traffic from the Central to the Peripheral node.
addTrafficSource(centralNode,traffic, ...
DestinationNode=peripheralNode);
Add the Central and Peripheral nodes to the wireless network simulator.
addNodes(networkSimulator,[centralNode peripheralNode]);
Specify the simulation time in seconds.
simulationTime = 0.05;
Run the simulation for the specified simulation time.
run(networkSimulator,simulationTime);
Retrieve application, baseband, and physical layer (PHY) statistics corresponding to the Central and Peripheral nodes.
centralStats = statistics(centralNode)
centralStats = struct with fields:
Name: "Node1"
ID: 1
App: [1x1 struct]
Baseband: [1x1 struct]
PHY: [1x1 struct]
peripheralStats = statistics(peripheralNode)
peripheralStats = struct with fields:
Name: "Node2"
ID: 2
App: [1x1 struct]
Baseband: [1x1 struct]
PHY: [1x1 struct]
Simulate Bluetooth BR Network without Channel Effects
Create a wirelessNetworkSimulator
object.
networkSimulator = wirelessNetworkSimulator.init();
Create two Bluetooth BR nodes, one with the "central"
role and other with the "peripheral"
role. Specify the position of the Peripheral node in meters.
centralNode = bluetoothNode("central"); peripheralNode = bluetoothNode("peripheral",Position=[1 0 0]);
Create a default Bluetooth BR connection configuration object to configure and share a connection between Bluetooth BR Central and Peripheral nodes.
cfgConnection = bluetoothConnectionConfig;
Configure connection between the Central and the Peripheral nodes.
connection = configureConnection(cfgConnection,centralNode,peripheralNode);
Create and configure a networkTrafficOnOff
object to generate an On-Off application traffic pattern.
traffic = networkTrafficOnOff(DataRate=200,PacketSize=27, ...
GeneratePacket=true,OnTime=inf);
Add application traffic from the Central to the Peripheral node.
addTrafficSource(centralNode,traffic, ...
DestinationNode=peripheralNode);
Add the Central and Peripheral nodes to the wireless network simulator.
addNodes(networkSimulator,[centralNode peripheralNode]);
By default, the wirelessNetworkSimulator
object applies free-space path loss model for the channel effects. You can add custom channel effects by using the addChannelModel
function. However, to model the channel without any channel effects, specify a custom MATLAB™ function, removeChannelEffect, in which the input transmitted packets are returned at the output without any changes.
addChannelModel(networkSimulator,@removeChannelEffect);
Specify the simulation time in seconds.
simulationTime = 0.05;
Run the simulation for the specified simulation time.
run(networkSimulator,simulationTime);
Retrieve application, baseband, and physical layer (PHY) statistics corresponding to the Central and Peripheral nodes.
centralStats = statistics(centralNode)
centralStats = struct with fields:
Name: "Node1"
ID: 1
App: [1x1 struct]
Baseband: [1x1 struct]
PHY: [1x1 struct]
peripheralStats = statistics(peripheralNode)
peripheralStats = struct with fields:
Name: "Node2"
ID: 2
App: [1x1 struct]
Baseband: [1x1 struct]
PHY: [1x1 struct]
function outputData = removeChannelEffect(~,txData) outputData = txData; end
Create, Configure, and Simulate an 802.11ax Mesh Network
This example shows how to create, configure, and simulate an IEEE® 802.11ax™ (Wi-Fi 6) mesh network.
Using this example, you can:
Create and configure an 802.11ax mesh network consisting of four mesh nodes.
Generate, configure, and add on-off application traffic between the mesh nodes.
Add mesh paths to route application traffic from the source node to the sink node.
Simulate the 802.11ax mesh network and visualize the statistics.
The example simulates this mesh network scenario.
The mesh node 1 (source) generates and transmits application traffic to mesh node 4 (sink) through intermediate relay nodes, mesh node 2, and mesh node 3. The example simulates mesh network communication in the 5 GHz band.
Check if the Communications Toolbox™ Wireless Network Simulation Library support package is installed. If the support package is not installed, MATLAB® returns an error with a link to download and install the support package.
wirelessnetworkSupportPackageCheck;
Set the seed for the random number generator to 1
. The seed value controls the pattern of random number generation. The random number generated by the seed value impacts several processes within the simulation including backoff counter selection at the MAC layer and predicting packet reception success at the physical layer. To improve the accuracy of your simulation results, after running the simulation, you can change the seed value, run the simulation again, and average the results over multiple simulations.
rng(1,"combRecursive");
Specify the simulation time in seconds.
simulationTime = 0.5;
Initialize the wireless network simulator.
networkSimulator = wirelessNetworkSimulator.init;
Specify the names and positions of the mesh nodes.
nodeNames = ["MeshNode1","MeshNode2","MeshNode3","MeshNode4"]; nodePositions = [10 0 0; 20 0 0; 30 0 0; 40 0 0]; % x-, y-, and z-coordinates, in meters
Set the configuration parameters of the mesh nodes by using the wlanDeviceConfig
(WLAN Toolbox) object.
meshNodeCfg = wlanDeviceConfig(Mode="mesh",BandAndChannel=[5 36],MCS=7,TransmitPower=15);
Create the mesh nodes from the specified configuration by using the wlanNode
(WLAN Toolbox) object.
meshNodes = wlanNode(Name=nodeNames, ... Position=nodePositions, ... DeviceConfig=meshNodeCfg);
Generate an on-off application traffic pattern by using the networkTrafficOnOff
object. Configure the on-off application traffic by specifying the application data rate and packet size. Add application traffic from mesh node 1 to mesh node 4.
trafficSource = networkTrafficOnOff(DataRate=50000,PacketSize=1500); addTrafficSource(meshNodes(1),trafficSource,DestinationNode=meshNodes(4));
Add mesh paths to propagate the application traffic from the source mesh node 1 to the destination mesh node 4. The application traffic flows from mesh node 1 to mesh node 4 through the intermediate relay nodes mesh node 2 and mesh node 3.
addMeshPath(meshNodes(1),meshNodes(4),meshNodes(2)); addMeshPath(meshNodes(2),meshNodes(4),meshNodes(3)); addMeshPath(meshNodes(3),meshNodes(4));
Add nodes to the wireless network simulator.
addNodes(networkSimulator,meshNodes);
Run the network simulation for the specified simulation time.
run(networkSimulator,simulationTime);
At each mesh node, the simulation captures the statistics by using the statistics
object function. The stats
variable captures the application statistics, MAC layer statistics, physical layer statistics, and mesh forwarding statistics for each node. For more information about these statistics, see the WLAN System-Level Simulation Statistics (WLAN Toolbox) topic.
stats = statistics(meshNodes)
stats=1×4 struct array with fields:
Name
ID
App
MAC
PHY
Mesh
Create, Configure, and Simulate 5G Network
Initialize wireless network simulator.
networkSimulator = wirelessNetworkSimulator.init;
Create a gNB node with these specifications.
Duplex mode — Time division duplex
Channel bandwidth — 20 MHz
Subcarrier spacing — 30 KHz
gnb = nrGNB(ChannelBandwidth=20e6,DuplexMode="TDD",SubcarrierSpacing=30e3);
Create a UE node with a transmit power of 20 dBm.
ue = nrUE(TransmitPower=20);
Configure these uplink power control parameters at the gNB node.
Nominal transmit power of UE per resource block — 7 dBm
Fractional power control multiplier— 2
configureULPowerControl(gnb,PoPUSCH=7,Alpha=0.4)
Add a random way point mobility model to the UE node.
addMobility(ue,BoundaryShape="rectangle")
Establish a connection between the UE and gNB nodes.
connectUE(gnb,ue)
Create a voice over Internet protocol (VoIP) application traffic pattern object.
traffic = networkTrafficVoIP(GeneratePacket=true);
Add the data traffic source to the gNB node. Set the destination node as the UE node.
addTrafficSource(gnb,traffic,DestinationNode=ue)
Add the gNB node to the wireless network simulator.
addNodes(networkSimulator,gnb)
Add the UE node to the wireless network simulator.
addNodes(networkSimulator,ue)
Specify the simulation time, in seconds.
simulationTime = 0.3;
Run the simulation for the specified simulation time.
run(networkSimulator,simulationTime)
Obtain the statistics for the gNB and UE nodes.
gnbStats = statistics(gnb); ueStats = statistics(ue);
Version History
Introduced in R2022bR2023a: Moved to Communications Toolbox Wireless Network Simulation Library from Bluetooth Toolbox
Previously wirelessNetworkSimulator
required Bluetooth® Toolbox.
See Also
Objects
Topics
- Wireless Network Simulator
- Plug Custom Channel into Wireless Network Simulator
- Create, Configure, and Simulate Bluetooth BR/EDR Piconet (Bluetooth Toolbox)
- Bluetooth BR/EDR Data and Voice Communication with WLAN Signal Interference (Bluetooth Toolbox)
- Simulate Multiple Bluetooth BR/EDR Piconets with ACL Traffic (Bluetooth Toolbox)
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