This repository contains the implementation of DDR, a Deadline-Driven Routing Protocol designed to provide delay-guaranteed service in networks. This work was presented at IEEE INFOCOM 2024.

• Introduction
• Features
• Installation
• Usage
• License
• Acknowledgments

DDR (Deadline-Driven Routing) is a distributed traffic-aware adaptive routing protocol that provides delay-guaranteed service. Time-sensitive applications have become increasingly prevalent in modern networks, necessitating the development of Delay-Guaranteed Routing (DGR) solutions. Finding an optimal DGR solution remains a challenging task due to the NP-hard nature of the problem and the dynamic nature of network traffic. Inspired by online navigation techniques, DDR leverages real-time traffic conditions to optimize routing decisions and ensure on-time packet delivery. By combining network topology-based path generation with real-time traffic knowledge, each router can adjust packet forwarding directions to meet its heterogeneous latency requirements.

Comprehensive simulations on real-world network topologies demonstrate that DDR can consistently provide delay-guaranteed service in different network topologies with varying traffic conditions. In addition, DDR ensures backward compatibility with legacy devices and existing routing protocols, making it a viable solution for supporting delay-guaranteed service.

DDR is implemented based on ns-3.38. Running this code requires cloning it into the ns-3 contrib/ folder.

• Deadline-aware packet scheduling
• Adaptive routing based on network conditions
• Support for various network topologies
• Performance evaluation tools

To install the necessary dependencies and set up the environment for DDR, follow these steps:

1. Clone the ns-3.38 repository and navigate to the contrib/ directory:

   git clone https://gitlab.com/nsnam/ns-3-dev.git ns-3.38
   cd ns-3.38/contrib

2. Clone the DDR repository into the contrib/ directory:

   git clone https://github.com/yourusername/DDR.git

3. Build ns-3 with the DDR module:

   cd ..
   ./ns3 configure --enable-examples
   ./ns3 build

To run a demo of DDR:

cp contrib/ddr/examples/ddr-demo.cc scratch/ddr-demo.cc
./ns3 --run "scratch/ddr-demo.cc"

To reproduce the experimental results:

cd ns-3.38
bash contrib/ddr/infocomm2024/EXP1/EPOCH1/code/exp1-1.sh
bash contrib/ddr/infocomm2024/EXP1/EPOCH2/code/exp1-2.sh
bash contrib/ddr/infocomm2024/EXP1/EPOCH3/code/exp1-3.sh

This project is licensed under the MIT License - see the LICENSE file for details.

We would like to thank the contributors and the research community for their valuable feedback and support. Special thanks to the IEEE INFOCOM 2024 conference for providing a platform to present our work.