How can I simulate and analyze ping-pong handovers in NetSim 5G?

Simulating Ping-Pong Handovers in NetSim 5G

Simulating ping-pong handovers in NetSim 5G involves creating a scenario where the User Equipment (UE) keeps switching between two Base Stations (BS) due to fluctuating signal strength. Here's how you can achieve this:

Network Setup:

Open NetSim and navigate to Experiments > 5G NR > Handover in 5GNR. There might be pre-built examples for handover algorithms. You can use those as a base or create a new one.

Create the Network: You'll need two gNBs (Next Generation Node B - 5G base station) and one UE. Place the UE near the edge of the coverage area of one gNB.

Enable Shadow Fading: In the gNB properties, enable shadow fading for the radio channel. This will simulate fluctuations in signal strength experienced by the UE as it moves.

Handover Parameters:

Handover Threshold: Set a low handover threshold (e.g., -2 dB) in the UE or EPC (Evolved Packet Core) settings. This will trigger handovers more frequently based on small changes in received signal strength.

Handover Hysteresis: You can adjust the handover hysteresis (optional) to define a minimum improvement needed in the target signal before switching back to the previous BS. This can help reduce ping-pong effects to some extent.

Analysis:

Run Simulation: Run the simulation and observe the handover events. You can use the NetSim event trace to analyze the handover details like time, source, and target cells.

Metrics: Analyze metrics like handover ping-pong ratio (number of unnecessary handovers), handover latency (time taken for handover completion), and call drops due to handover failures.

Tips:

You can experiment with different UE movement patterns (e.g., constant speed along the cell edge) to see how it affects ping-pong handovers.
NetSim offers functionalities to automate simulations with varying parameters. This can help you analyze the impact of different configurations on ping-pong.

Additional Resources:

NetSim Help Centre on Handover in 5GNR: https://tetcos.com/help/v13.2/Experiments-Manual/Handover-in-5GNR.html
Performance analysis of 5G Handovers using NetSim: https://tetcos.com/help/v13.2/Experiments-Manual/Handover-in-5GNR.html

Abdulwahid Mohammed

To simulate and analyze ping-pong handovers in NetSim 5G, you can follow these general steps:

Create a 5G network scenario: Start by creating a 5G network scenario in NetSim, including a 5G base station (gNB) and multiple user equipment (UEs) that are moving around the coverage area.

Configure the mobility pattern: Set the mobility pattern for the UEs to create a scenario where the UEs are moving in a way that will trigger frequent handovers between the 5G base stations.

Enable ping-pong handover detection: In the NetSim 5G configuration, enable the ping-pong handover detection feature. This will allow NetSim to identify and track the occurrence of ping-pong handovers during the simulation.

Adjust handover parameters: Tune the handover-related parameters, such as the handover threshold, hysteresis, and time-to-trigger, to observe their impact on the occurrence of ping-pong handovers. This will help you understand how different parameter settings affect the handover behavior.

Run the simulation: Run the simulation and observe the handover events in the NetSim logs and statistics. Look for instances where a UE is quickly handed over back and forth between two base stations, indicating a ping-pong handover.

Analyze the results: Examine the simulation results, including the handover statistics, latency, and throughput, to understand the impact of ping-pong handovers on the overall network performance.

Optimize the network configuration: Based on the analysis, you can adjust the handover parameters or consider other strategies, such as introducing cell-range expansion or adjusting the base station coverage, to mitigate the occurrence of ping-pong handovers and improve the network performance.

Here's an example of how you can configure and analyze ping-pong handovers in NetSim 5G using the Markdown code:

# Simulating Ping-Pong Handovers in NetSim 5G

1. Create a new 5G network scenario in NetSim.

2. Add a 5G base station (gNB) and multiple user equipment (UEs) to the scenario.

3. Set the mobility pattern for the UEs to create a scenario where they move in a way that triggers frequent handovers.

4. In the 5G configuration settings, enable the "Ping-Pong Handover Detection" feature.

5. Adjust the handover-related parameters, such as:

- Handover Threshold: -70 dBm

- Hysteresis: 3 dB

- Time-to-Trigger: 40 ms

6. Run the simulation and observe the handover events in the NetSim logs and statistics.

7. Analyze the simulation results, focusing on:

- Handover statistics: Number of handovers, ping-pong handovers, etc.

- Latency: Impact of ping-pong handovers on latency

- Throughput: Impact of ping-pong handovers on throughput

8. Adjust the handover parameters or consider other strategies to mitigate the occurrence of ping-pong handovers and improve the network performance.

By following these steps, you can effectively simulate and analyze ping-pong handovers in your 5G network scenario using NetSim, and then explore ways to optimize the network configuration to minimize the impact of this phenomenon.

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