ASSIGN (Advancing Solar System Internet and GrouNd) is a multi-directorate initiative safeguarding Europe's role and interests in the global vision of Solar System Internet. As humanity expands its presence beyond Earth, reliable communication networks and autonomous navigation capabilities will be essential. ESA's systematic approach to developing the Solar System Internet based on interoperable standards ensures that European capabilities will be integral to humanity's interplanetary future, with European companies playing a leading role.