bluetoothNode
Download Required: To use bluetoothNode
,
first download the Communications Toolbox Wireless Network Simulation Library add-on. For more
information, see Get and Manage Add-Ons.
Description
Use the bluetoothNode
object to create and configure a
Bluetooth® basic rate/enhanced data rate (BR/EDR) node.
Creation
Syntax
Description
creates a default
Bluetooth BR/EDR node object with a BREDRNode
= bluetoothNode"peripheral"
role.
creates a Bluetooth BR/EDR node object with the Role
property set to BREDRNode
= bluetoothNode(role
)role
.
sets the properties of
the Bluetooth BR/EDR node object with a BREDRNode
= bluetoothNode(Name=Value
)"peripheral"
role by using one
or more optional name-value arguments. For example, NoiseFigure=5
sets
the noise figure of the Peripheral node to 5 dB.
You can use this syntax to generate an array of Bluetooth BR/EDR node objects by
specifying the value of the Position
property.
creates a Bluetooth BR/EDR node object with the Role
property set to BREDRNode
= bluetoothNode(role
,Name=Value
)role
and the other properties
specified by using one or more optional name-value arguments. For example,
bluetoothNode("central",NoiseFigure=5)
sets the noise figure of the
specified node to 5 dB.
Properties
Role
— Role of Bluetooth BR/EDR Node
"peripheral"
(default) | "central"
This property is read-only.
Role of the Bluetooth BR/EDR node, specified as "central"
or
"peripheral"
. The role
argument sets the value
of this property.
Data Types: char
| string
Position
— Node position in 3-D Cartesian coordinates
[0 0 0]
(default) | numeric N-by-3 matrix
Node position in 3-D Cartesian coordinates, specified as a numeric
N-by-3 matrix, where N is the number of nodes.
By specifying a matrix with N greater than one, you can create a
1-by-N array of bluetoothNode
objects.
Specify this value in meters. This value specifies the positions of the nodes in Cartesian x-, y-, and z-coordinates.
Data Types: double
Name
— Name of Bluetooth BR/EDR node
"NodeN"
(default) | character vector | string scalar | string array | cell array of character vectors
Name of Bluetooth BR/EDR node, specified as a character vector, string scalar,
string array, or cell array of character vectors. The default format of this property is
"NodeN"
, where N is the
node identifier specified by the ID
property.
When you create an array of bluetoothNode
objects by specifying the
Position
property, you can name each node in the array at once by specifying the
Name
as a string array or cell array of character vectors. If the
length of the Name
array is greater than the number of nodes, the
extra names do not apply. If the length of the Name
array is less
than the number of nodes, the extra nodes get default names.
Data Types: char
| string
| cell
TransmitterGain
— Transmitter antenna gain
0
(default) | finite numeric scalar
Transmitter antenna gain, specified as a finite numeric scalar. Units are in dB.
Data Types: double
ReceiverGain
— Receiver antenna gain
0
(default) | finite numeric scalar
Receiver antenna gain, specified as a finite numeric scalar. Units are in dB.
Data Types: double
ReceiverSensitivity
— Receiver sensitivity
-100
(default) | finite numeric scalar
Receiver sensitivity, specified as a finite numeric scalar. This property sets the minimum power that the receiver requires to detect the incoming packet. If the received power of an incoming packet is below this value, the node drops the packet. Units are in dBm.
Data Types: double
NoiseFigure
— Noise figure
0
(default) | nonnegative finite scalar
Noise figure, specified as a nonnegative finite scalar. The object uses this value to apply thermal noise on the received packet. Units are in dB.
Data Types: double
InterferenceModeling
— Type of interference modeling
"overlapping-adjacent-channel"
(default) | "non-overlapping-adjacent-channel"
Type of interference modeling, specified as
"overlapping-adjacent-channel"
or
"non-overlapping-adjacent-channel"
.
"overlapping-adjacent-channel"
— The object considers signals overlapping in time and frequency to be interference."non-overlapping-adjacent-channel"
— In addition to signals that satisfy the conditions described under"overlapping-adjacent-channel"
, the object considers signals that overlap with the SOI in time and with the interval [f1 – fd, f2 + fd] in frequency to be interference. f1 and f2 are the starting and ending frequencies of the SOI, respectively. fd is the value of the MaxInterferenceOffset property.
Data Types: char
| string
MaxInterferenceOffset
— Maximum frequency offset for determining signal interference
100e6
(default) | nonnegative scalar
Maximum frequency offset for determining signal interference, specified as a
nonnegative scalar. Units are in Hz. This property specifies the offset between the edge
of the SOI frequency and the edge of the interfering signal. If you specify this
property as Inf
, the object considers all the signals that overlap in
time, regardless of their frequency, to be interference. If you specify this property as
a finite nonnegative scalar, the object considers all the signals overlapping in time
and with frequency in the range [(f1 –
),
(f2 +
MaxInterferenceOffset
)], to be
interference.MaxInterferenceOffset
Dependencies
To enable this property, set the InterferenceModeling
property to
"non-overlapping-adjacent-channel"
.
Data Types: double
ID
— Node identifier
integer scalar
This property is read-only.
Node identifier, stored as an integer scalar. This value specifies a unique
identifier for the node in the simulation. The object assigns this value incrementally,
starting from 1
.
Note
If you create and store the Bluetooth BR/EDR nodes in an uninitialized matrix, the IDs that this property allocates to the nodes can be nonsequential because of the memory allocation to the object in the matrix. For more information about MATLAB memory allocation, see How MATLAB Allocates Memory.
Data Types: double
NodeAddress
— Address of Bluetooth BR/EDR node
12-element character vector | string scalar denoting 6-octet hexadecimal value
This property is read-only.
Address of the Bluetooth BR/EDR node, stored as a 12-element character vector or a
string scalar denoting a 6-octet hexadecimal value. This value is unique to each
Bluetooth BR/EDR node and is derived from the ID
property.
Data Types: char
| string
ConnectionConfig
— Bluetooth BR/EDR connection configuration parameters
bluetoothConnectionConfig
object
This property is read-only.
Bluetooth BR/EDR connection configuration parameters, stored as a bluetoothConnectionConfig
object.
NumConnections
— Number of active connections associated with the node
Nonnegative integer
This property is read-only.
Number of Peripheral nodes associated with the Central node, stored as a positive integer.
Dependencies
To enable this property, set the Role
property to "central"
.
Data Types: double
Object Functions
Specific to This Object
addMobility | Add random waypoint mobility model to Bluetooth BR/EDR node |
addTrafficSource | Add data traffic source to Bluetooth BR/EDR node on ACL connection |
configureScheduler | Configure baseband scheduler at Bluetooth BR/EDR Central node |
kpi | Returns key performance indicators (KPIs) for Bluetooth BR/EDR nodes |
statistics | Get statistics of Bluetooth BR/EDR node |
updateChannelList | Update channel list of Bluetooth BR/EDR node |
Examples
Create, Configure, and Simulate Bluetooth BR Nodes
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;
Initialize the wireless network simulator.
networkSimulator = wirelessNetworkSimulator.init;
Create two Bluetooth BR nodes, one with the "central"
role and the other with the "peripheral"
role. Specify the position of the Peripheral node, in meters.
centralNode = bluetoothNode("central"); peripheralNode = bluetoothNode("peripheral",Position=[1 0 0]);
Add a random waypoint mobility model to the peripheral node. Set the shape of the node's mobility area to "circle"
.
addMobility(peripheralNode,BoundaryShape="circle")
Create a default Bluetooth BR/EDR connection configuration object to configure and share a connection between the Bluetooth BR Central and Peripheral nodes.
cfgConnection = bluetoothConnectionConfig;
Configure the connection between the Central and the Peripheral nodes.
connection = configureConnection(cfgConnection,centralNode,peripheralNode)
connection = bluetoothConnectionConfig with properties: CentralToPeripheralACLPacketType: "DH1" PeripheralToCentralACLPacketType: "DH1" SCOPacketType: "None" HoppingSequenceType: "Connection adaptive" UsedChannels: [0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 ... ] (1x79 double) PollInterval: 40 InstantOffset: 240 TransmitterPower: 20 SupervisionTimeout: 32000 CentralAddress: "D091BBE70001" PrimaryLTAddress: 1
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 = 0.3;
Run the simulation for the specified simulation time.
run(networkSimulator,simulationTime);
Retrieve the 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]
Schedule Updated Channel Map for Bluetooth EDR Node
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;
Initialize the wireless network simulator object.
networkSimulator = wirelessNetworkSimulator.init();
Create two Bluetooth EDR 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/EDR connection configuration object to configure and share a connection between Bluetooth EDR Central and Peripheral nodes.
cfgConnection = bluetoothConnectionConfig(CentralToPeripheralACLPacketType="2-DH3",PeripheralToCentralACLPacketType="2-DH5");
Configure connection between the Central and the Peripheral nodes.
connection = configureConnection(cfgConnection,centralNode,peripheralNode)
connection = bluetoothConnectionConfig with properties: CentralToPeripheralACLPacketType: "2-DH3" PeripheralToCentralACLPacketType: "2-DH5" SCOPacketType: "None" HoppingSequenceType: "Connection adaptive" UsedChannels: [0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 ... ] (1x79 double) PollInterval: 40 InstantOffset: 240 TransmitterPower: 20 SupervisionTimeout: 32000 CentralAddress: "D091BBE70001" PrimaryLTAddress: 1
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);
Schedule channel list update at the Central node at 0.05 seconds to use channels 0 to 40.
scheduleAction(networkSimulator,@(varargin) updateChannelList(centralNode, ...
0:40,DestinationNode=peripheralNode),[],0.05);
Add the Central and Peripheral nodes to the wireless network simulator.
addNodes(networkSimulator,[centralNode peripheralNode]);
Specify the simulation time in seconds.
simulationTime = 0.3;
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); peripheralStats = statistics(peripheralNode);
References
[1] Bluetooth Technology Website. “Bluetooth Technology Website | The Official Website of Bluetooth Technology.” Accessed May 22, 2022. https://www.bluetooth.com/.
[2] Bluetooth Core Specifications Working Group. "Bluetooth Core Specification" v5.3. https://www.bluetooth.com/.
Version History
Introduced in R2022bR2024b: InterferenceFidelity
property will be removed
The
property issues a
warning that it will be removed in a future release. Use the new InterferenceFidelity
InterferenceModeling
property instead. For code that uses the
default interference modeling, you do not need to make any changes as the object manages the
transition internally. However, if you have explicitly set the
InterferenceFidelity
property, you must change the property name from
InterferenceFidelity
to InterferenceModeling
,
and modify the value from 0
or 1
to
"overlapping-adjacent-channel"
or
"non-overlapping-adjacent-channel"
, respectively. This table shows the
change in syntax after this update.
Syntax Before This Update | Syntax After This Update |
---|---|
bluetoothNode(“central”,InterferenceFidelity=0) |
bluetoothNode(“central”,InterferenceModeling=”overlapping-adjacent-channel”) |
bluetoothNode(“peripheral”,InterferenceFidelity=1) |
bluetoothNode(“peripheral”,InterferenceModeling=”non-overlapping-adjacent-channel”) |
R2024a: Model interference at Bluetooth node
These two new properties of the bluetoothNode
object enable you to
model interference by considering signals overlapping in the time and frequency domains.
InterferenceModeling
— Use this property to set the type of interference modeling.MaxInterferenceOffset
— Use this property to specify the offset between the edge of the SOI frequency and the edge of the interfering signal.
R2024a: InterferenceFidelity
property will be removed
The
property will be
removed in a future release. Use the new InterferenceFidelity
InterferenceModeling
property instead. For code that uses the
default interference modeling, you do not need to make any changes as the object manages the
transition internally. However, if you have explicitly set the
InterferenceFidelity
property, you must change the property name from
InterferenceFidelity
to InterferenceModeling
,
and modify the value from 0
or 1
to
"overlapping-adjacent-channel"
or
"non-overlapping-adjacent-channel"
, respectively. This table shows the
change in syntax after this update.
Syntax Before This Update | Syntax After This Update |
---|---|
bluetoothNode(“central”,InterferenceFidelity=0) |
bluetoothNode(“central”,InterferenceModeling=”overlapping-adjacent-channel”) |
bluetoothNode(“peripheral”,InterferenceFidelity=1) |
bluetoothNode(“peripheral”,InterferenceModeling=”non-overlapping-adjacent-channel”) |
R2023a: Includes support for adding random waypoint mobility model to Bluetooth BR/EDR node
The bluetoothNode object now supports adding a random waypoint mobility model to Bluetooth
BR/EDR nodes through the addMobility
object function.
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