Space System Internetworking: The Foundational Role of Delay and Disruption-Tolerant Networking

As humanity's reach in space exploration extends beyond Earth's orbit, the demand for robust and efficient communication systems intensifies. The traditional paradigm of isolated missions has given way to a complex network of diverse spacecraft engaged in terrestrial research, lunar exploration, and the provision of essential satellite services. Yet, the limitations of current spacecraft communication technology, which predominantly rely on individual spacecraft connections, are becoming increasingly apparent. These systems grapple with issues of scalability, collaboration, automation, and reliability. This paper addresses these challenges by exploring the development of more sophisticated systems designed to meet the evolving demands of space exploration. It delves into the specifics of the Interplanetary Overlay Network (ION) implementation of Delay and Disruption Tolerant Networking (DTN), a comprehensive software system stack that accommodates a variety of applications and Convergence Layer Adapters (CLAs). The paper also forecasts the future of DTN implementation, highlighting key developments and advancements anticipated between 2023 and 2029. These advancements are expected to enhance the functionality and reliability of DTN-based systems.