In a radio access network (RAN) where information may be sent to a mobile radio
unit using a shared radio channel shared by other mobile radio units, a first transport
bearer is established between a first RAN node, e.g., a drift RNC, and a second
RAN node, e.g., a base station, to transport data to be transmitted on the shared
radio channel. A second transport bearer is established between the first and second
RAN nodes to transport control information originated in the first RAN node that
relates to the first transport bearer data. The first RAN node then transmits the
control information over the second transport bearer to the second RAN node. The
control information might include, for example, scheduling information known to
the first RAN node because the first RAN node supervises scheduling of data to
be transmitted on the shared radio channel. The control information may provide
to the mobile radio unit information needed to decode the data transmitted on the
shared radio channel. Such needed information might include, for example, a frame
identifier, a specific radio resource like a spreading code, and/or an indication
of how different radio resources associated with different connections are multiplexed
on the shared radio channel. In one example, non-limiting embodiment, the control
information includes transport format indication information such as transmit format
combination indicator (TFCI) information employed in third generation Universal
Mobile Telephone Systems (UMTS) in accordance with the 3GPP specification.