A method and an apparatus are described for sending packet data over a wireless
link. The method includes sequentially multiplexing a plurality of radio bearers
onto one Temporary Block Flow (TBF) by performing, for a first radio bearer, transmitting
the first radio bearer identity to a receiver in at least one first Radio Link
Control (RLC) block of a Temporary Block Flow (TBF); upon an occurrence of a change
from the first radio bearer to a second radio bearer, transmitting the second radio
bearer identity to the receiver in at least one subsequent Radio Link Control (RLC)
block of the same TBF; and, at the receiver, sequentially demultiplexing the plurality
of radio bearers from the one Temporary Block Flow (TBF) by first detecting the
presence of the radio bearer identities in received RLC blocks.
