This definition appears somewhat frequently
See other definitions of RAB
Samples in periodicals archive:
The Radio Access Bearers are provided by the Access Stratum. Over Iu-BC, a datagram mechanism is used; 3GPP TS 25.411 ...
GSM Association Non-confidential Official Document IR.94 - IMS Profile for Conversational Video Service V5.0 Page 5 of 16 RAB Radio Access Bearer
The purpose of the admission control is to admit or deny new users, new radio access bearers or new radio links (for example due to handover).