A method and apparatus for processing data blocks during soft handover.
The apparatus may be a wireless communication system including at least
two enhanced uplink soft handover (EU-SHO) Node-Bs and a radio network
controller (RNC). Each Node-B decodes a received data block and forwards
the decoded data block to the RNC. If the RNC receives at least one copy
of a successfully decoded data block, the RNC uses a re-ordering function
entity to process the copy of the successfully decoded data block to
support in-sequence delivery to higher protocol layers. If the RNC
receives more than one copy of a successfully decoded data block, the RNC
discards the extra successfully decoded data block copies. The RNC is
either a serving-RNC (S-RNC) or a controlling-RNC (C-RNC). Each Node-B
includes a medium access control (MAC) entity that handles enhanced
uplink dedicated channel (EU-DCH) functionalities.