4 General aspects

25.4353GPPRelease 17TSUTRAN Iub interface user plane protocols for Common Transport Channel data streams

4.1 Common Transport Channel Data Stream User Plane Protocol Services

Common transport channel provides the following services:

– Transport of TBS between the Node B and the CRNC for common transport channels.

– Support of transport channel synchronisation mechanism.

– Support of Node Synchronisation mechanism.

4.2 Services expected from the Data Transport Network layer

The following services are expected from the transport layer:

– Delivery of Frame Protocol PDUs.

In sequence delivery is not required. However, frequent out-of-sequence delivery may impact the performance and should be avoided.

4.3 Protocol Version

This revision of the specification specifies version 1 of the protocols.