How to Implement 5G network Slicing in ns2

To implement the 5G network slicing in ns2 (Network Simulator 2) which has complexity due to ns2 was mainly build for older generation networks and cannot offer the support needed for 5G technologies and mechanisms like network slicing. It includes generating numerous virtual networks on top of common physical infrastructure, all customized to particular service demands contains enhanced mobile broadband (eMBB), massive machine-type communications (mMTC), and ultra-reliable low-latency communications (URLLC).

Though, you can compute the concept of network slicing by generating various logical network topologies or traffic classes inside ns2 that replicate the action of slices. It will help you get started with ns2 by offering demonstration process below:

Step-by-Step Implementation:

Step 1: Conceptualize Network Slicing

  1. Slices: Each slice can be thought of as a individual network with its own routing, QoS, and resource distribution criteria. For instance, you could generate three slices:
    • eMBB Slice: For high-bandwidth services like video streaming.
    • mMTC Slice: For IoT devices with massive connectivity.
    • URLLC Slice: For low-latency, high-reliability applications like self-sufficient driving or remote surgery.
  2. Traffic Types: Various kinds of traffic will be directed over multiple slices with proper QoS configurations. request

Step 2: Create the Tcl Script

Below is a sample of Tcl script that simulates a basic network slicing scenario by generating various traffic classes to indicate slices.

Example Tcl Script for Simulating 5G Network Slicing in ns2

# Create a simulator object

set ns [new Simulator]

# Define the topography object

set topo [new Topography]

$topo load_flatgrid 1000 1000  # 1km x 1km area

# Create the General Operations Director (GOD) for wireless simulations

create-god 6  # Number of nodes (3 user nodes, 3 base stations)

# Configure the nodes (representing base stations and users)

$ns node-config -adhocRouting AODV \

-llType LL \

-macType Mac/802_11 \

-ifqType Queue/DropTail/PriQueue \

-ifqLen 50 \

-antType Antenna/OmniAntenna \

-propType Propagation/TwoRayGround \

-phyType Phy/WirelessPhy \

-channelType Channel/WirelessChannel \

-topoInstance $topo \

-agentTrace ON \

-routerTrace ON \

-macTrace ON \

-movementTrace OFF

# Open trace and NAM files for recording the simulation

set tracefile [open slicing_out.tr w]

$ns trace-all $tracefile

set namfile [open slicing_out.nam w]

$ns namtrace-all-wireless $namfile 1000 1000

# Define a finish procedure to close files and end the simulation

global ns tracefile namfile

$ns flush-trace

close $tracefile

close $namfile

exec nam slicing_out.nam &

exit 0

}

# Create nodes representing base stations

set bs1 [$ns node]

set bs2 [$ns node]

set bs3 [$ns node]

# Create nodes representing user devices

set user1 [$ns node]

set user2 [$ns node]

set user3 [$ns node]

# Set initial positions for base stations (fixed positions)

$bs1 set X_ 100.0

$bs1 set Y_ 500.0

$bs1 set Z_ 0.0

$bs2 set X_ 500.0

$bs2 set Y_ 500.0

$bs2 set Z_ 0.0

$bs3 set X_ 900.0

$bs3 set Y_ 500.0

$bs3 set Z_ 0.0

# Set initial positions for users (within coverage area)

$user1 set X_ 200.0

$user1 set Y_ 500.0

$user1 set Z_ 0.0

$user2 set X_ 500.0

$user2 set Y_ 700.0

$user2 set Z_ 0.0

$user3 set X_ 800.0

$user3 set Y_ 500.0

$user3 set Z_ 0.0

# Define traffic for eMBB slice (high data rate, high throughput)

set tcp1 [new Agent/TCP]

$ns attach-agent $user1 $tcp1

set sink1 [new Agent/TCPSink]

$ns attach-agent $bs1 $sink1

$ns connect $tcp1 $sink1

set ftp1 [new Application/FTP]

$ftp1 attach-agent $tcp1

$ftp1 start

# Define traffic for mMTC slice (many small, infrequent messages)

set udp2 [new Agent/UDP]

$udp2 set packetSize_ 100  # Small packets

$udp2 set interval_ 2.0    # Low-frequency transmission

$ns attach-agent $user2 $udp2

set null2 [new Agent/Null]

$ns attach-agent $bs2 $null2

$ns connect $udp2 $null2

set cbr2 [new Application/Traffic/CBR]

$cbr2 attach-agent $udp2

$cbr2 set packetSize_ 100

$cbr2 set rate_ 50Kb

$cbr2 start

# Define traffic for URLLC slice (low latency, high reliability)

set tcp3 [new Agent/TCP]

$tcp3 set window_ 5  # Smaller TCP window for reduced latency

$ns attach-agent $user3 $tcp3

set sink3 [new Agent/TCPSink]

$ns attach-agent $bs3 $sink3

$ns connect $tcp3 $sink3

set ftp3 [new Application/FTP]

$ftp3 attach-agent $tcp3

$ftp3 start

# Schedule the end of the simulation

$ns at 20.0 “finish”

# Run the simulation

$ns run

Step 3: Run the Tcl Script

Save the script with a .tcl extension, for example, slicing_simulation.tcl. Then, follow the command to execute the script in the terminal:

ns slicing_simulation.tcl

Step 4: Visualize the Simulation

To visualize the simulation, open the created NAM file using:

nam slicing_out.nam

Script Explanation

  • Base Stations and Users: The nodes bs1, bs2, and bs3 denote base stations or network infrastructure for each slice, while user1, user2, and user3 indicate user devices.
  • Traffic Classes:
    • eMBB Slice: Simulated by TCP traffic with high throughput demands.
    • mMTC Slice: Recreated by low-rate UDP traffic with small packet sizes, indicating IoT devices.
    • URLLC Slice: Mimicked by TCP traffic with a smaller window size, denoting low-latency, high-reliability communication.
  • Resource Allocation: Each slice is indicated by several traffic patterns and QoS settings, imitating the resource allotment and isolation amongst slices.

Customization

  • Multiple Users per Slice: Replicate a more different environment with several users per slice by attaching more user nodes to every slice.
  • Mobility Models: Execute mobility models to imitate users moving amidst base stations, which could be used to learn handovers amongst slices.
  • QoS Parameters: Explore the enactment of every slice in various conditions by testing with multiple QoS configurations (like delay, bandwidth).
  • Error Models: Present error models to simulate packet loss or changing channel conditions, reflecting real-world network threats.

Limitations

  • Simplified Approximation: It delivers a simplified model of network slicing and does not has the full difficulty of 5G network slicing like virtualized network functions (VNFs) or software-defined networking (SDN) control.
  • No Physical Layer Simulation: It does not mimic the physical layer characteristics of 5G includes millimeter-wave communication or massive MIMO.
  • Limited 5G-Specific Features: ns2 is not created for 5G networks, so the simulation is restricted to basic functionality and high-level abstractions.

This set up will help you by providing the step-by-step implementation of 5G network slicing simulation in ns2 with customization and limitation steps. Whenever you have some concerns about network slicing, we will guide you. Drop your research details we share with you innovative 5G network slicing projects with implementation results.ns2project.com will give you best research outcomes with detailed outcomes.