7 Signalling Bearer for ALCAP on I_ur Interface

25.4243GPPRelease 17TSUTRAN Iur interface data transport & transport signalling for Common Transport Channel data streams

7.1 ATM Transport Option

The signalling bearer for the ALCAP on the Iur interface for common transport channels data streams is the same as the signalling bearer for the ALCAP on the Iur interface for DCH data streams, defined in TS 25.426 [6].

7.2 IP Transport Option

An ALCAP protocol is not required in case both RNCs are using the IP transport option.