Today, broadcast and mobile systems work separately. Broadcast excels at delivering high capacity, one-to-many content, while mobile networks are better at personalized and interactive unicast services. The industry now needs a practical way to combine these strengths under a common IP-based structure.  

B2X (Broadcast-to-Everything) is a developing standard that merges the reach of broadcast with the intelligence of mobile networks. B2X aligns ATSC 3.0 with the 5G Core to connect broadcast delivery with mobile session control, security, and service management. This allows broadcasters and mobile operators to share network resources and offer consistent user experiences across all devices, whether content comes from over-the-air broadcast or through mobile network broadband.  

This paper introduces a framework for integrating ATSC 3.0 with B2X to build a broadcast system that works together with mobile networks. At the service layer, a common IP-based discovery and delivery framework connects the broadcast network to existing mobile applications. It enables unified service listings, shared metadata, and smooth transitions between broadcast and broadband. 

It also presents proof-of-concept work to validate how B2X can interwork with the 5G Core while supporting existing mobile applications. This work builds on established mobile service environments and focuses on significantly improving delivery efficiency within the broadcast transmission layer. Together, these advances demonstrate a practical path toward a globally interoperable broadcast and mobile ecosystem. 

In addition, the study details methods for integrating the 5G Core with the B2X framework and explains how discovery and delivery mechanisms can operate across both broadcast and broadband environments.