A method of scheduling packets for transmission over the air interface of a UMTS
Terrestrial Radio Access Network (UTRAN) in the case where a pair of Radio Network
Controllers (RNCs) are acting as separate serving and controlling (drift) RNCs
for a mobile terminal. The method comprises sending from the controlling RNC to
the serving RNC, allocated scheduling priorities together with packet sizes accepted
for transmission with those priorities by the controlling RNC. Subsequently the
serving RNC send to the controlling RNC, packets of sizes accepted by the serving
RNC together with respective allocated priorities.
