An identifier, required by a radio access network controller in order to
support resource allocation associated with a predetermined condition, is
sent from a core network to the radio access network controller
independently of the predetermined condition. The identifier is thus
available to the radio access network controller for verification of
mobile user identity, regardless of whether it is needed to support
resource allocation. A radio access network controller can receive an
identifier in a communication sent by a core network according to a
communication protocol. The radio access network controller terminates
the communication protocol to access the communication, and uses the
identifier for verification of mobile user identity.