DBM_LoRa_Simulation

This is a simulation of the Decentralized Burst Mitigation (DBM) mechanism for LoRa networks.

This code wa sused to produce the results for the publication DBM: Decentralized Burst Mitigation for Periodic LoRa Devices using Self-Organizing Radio Access submitted to ICC 2023.

Implementation and Structure

The simulation has been developed using the r-simmer discrete event simulation framework for the R programming language.

To run the example provided in this repository (run_dbm_sim.R), the following packages need to be present in the R environment:

• simmer
• tidyverse -- Actually only ggplot2, margrittr and dplyr
• data.table -- For longer running simulation to keep evaluation performant
• futile.logger -- To provide output of the simulation progress

install.packages(c("simmer", "tidyverse", "data.table", "futile.logger"))

The code is structured as follows

.
├── LICENSE
├── README.md
├── resources # Contains the overview image and other resources
│   └── dbm_example.pdf
├── run_dbm_sim.R # Main file to run
└── sim # Contains the actual simulation source
    ├── 01_dbm_lora.R # Executes a more realistic multi channel scenario
    ├── 02_dbm_lora_one_channel.R # Executes a single channel scenario
    └── trajectories # Contains the trajectory definitions for each of the different mechanisms
        ├── dbm_device # DBM mechanism for LoRa

Configuration

The run_dbm_sim.R main file includes a preconfigured example simulation for both scenarios. The simulation parameters are defined as below.

period<-c(900,900)
run_time<- 1800
run=1
delta<-2
scenario<-"device_variation_one_channel" # or any suitable scenario name
devices <- 500

Execution and Results

After running run_dbm_sim.R using the provided configuration, the output should look as shown here.

> source("~/git/2022-dbm-icc/run_dbm_sim.R")
[1] "dbm_one_channel"
INFO [2022-10-31 14:53:47] 0
INFO [2022-10-31 14:53:47] 0.1
INFO [2022-10-31 14:53:47] 0.2
INFO [2022-10-31 14:53:47] 0.3
INFO [2022-10-31 14:53:47] 0.4
INFO [2022-10-31 14:53:54] 0.5
INFO [2022-10-31 14:54:04] 0.6
INFO [2022-10-31 14:54:04] 0.7
INFO [2022-10-31 14:54:04] 0.8
INFO [2022-10-31 14:54:04] 0.9
INFO [2022-10-31 14:54:10] 1
[1] "dbm_multi_channel"
INFO [2022-10-31 14:54:10] 0
INFO [2022-10-31 14:54:10] 0.1
INFO [2022-10-31 14:54:10] 0.2
INFO [2022-10-31 14:54:10] 0.3
INFO [2022-10-31 14:54:10] 0.4
INFO [2022-10-31 14:54:17] 0.5
INFO [2022-10-31 14:54:28] 0.6
INFO [2022-10-31 14:54:28] 0.7
INFO [2022-10-31 14:54:28] 0.8
INFO [2022-10-31 14:54:28] 0.9
INFO [2022-10-31 14:54:35] 1

Here, the output shows the percentage progress towards completion. The simulation creates three output files in the ./results/ folder.

packetloss(...).csv contains information regarding the packetloss for each device for the whole simualtion, as well as information about the spreading factor, payload, period, and used channel.

devices(...).csv contains the information of the temporal neighbors and transmissions for each device for the last simulated transmission cycle.

timeline(...).csv contains data for all the steps of the DBM mechanism with timestamps for the whole simulation duration.

Contact

For questions or issues with the simulation, please raise an issue or contact Simon Raffeck (simon.raffeck@informatik.uni-wuerzburg.de) or any of the authors of the related publication.