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Broadcast and Multicast

Broadcast and Multicast

What you can build in this area is in preparation. The projects below show where the work stands today.

Projects in this area

5G Broadcast - TV and Radio ServicesPublic Warning Systems5G Multicast Broadcast Services (MBS)

What you can build​

Hybrid broadcast and unicast delivery​

Early stage

Broadcast What Is Common, Use Unicast Where Needed

Broadcast delivers what is common to all viewers; unicast handles what is individual, personalised, unavailable or interactive. An Android device plays a stream over 5G Broadcast and falls back to unicast when the broadcast signal is unavailable.

FeaturesSeamless switching between unicast and 5G Broadcast (Android) implemented

Converged unicast and multicast delivery​

Nothing to try yet in the Reference Tools.

Not yet possible​

What could be built next in this area. Each needs a feature that the Reference Tools do not implement yet, or that is still being specified.

Converged unicast and multicast delivery

  • In-Session Unicast Repair for MBS/MBMS Object DistributionNeeds: Object Repair (TS 26.502 clause 4.2.6)In the Reference Tools: to be checked
  • Broadcast What Is Common, Use Unicast Where Needed, over 5G MBSNeeds: Combined unicast, multicast and broadcast delivery (Release 20, in progress)In the Reference Tools: not implemented

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