Method and apparatus for assigning hybrid-automatic repeat request processes

A wireless transmit/receive unit (WTRU) for assigning a hybrid automatic repeat request (H-ARQ) process for supporting enhanced uplink (EU) transmission comprising:

• a receiver configured to receive configuration parameters for a plurality of medium access control for dedicated channel (MAC-d) flows, wherein the configuration parameters include a priority associated with each MAC-d flow and a maximum number of H-ARQ transmissions associated with each MAC-d flow;
• a controller configured to select data for transmission over an enhanced dedicated channel (E-DCH) based on a priority associated with at least one of the plurality of MAC-d flows, wherein data of at least one of the plurality of MAC-d flows associated with a highest priority that has data available for transmission is selected;
• on a condition that the selected data is new data that was not previously transmitted, the controller is configured to assign an available H-ARQ process for supporting transmission of the selected data, and a transmitter is configured to transmit the selected data over the E-DCH using the assigned H-ARQ process;
• on a condition that the selected data was previously transmitted, the transmitter is configured to transmit the selected data over the E-DCH using the same H-ARQ process that was assigned to previously transmit the selected data;
• a transmission counter configured to indicate a transmission count, wherein the controller is configured to increment the transmission counter in response to transmitting the selected data;
• wherein the controller is further configured to determine whether the transmission counter is at least equal to a maximum number of H-ARQ transmissions associated with one of the plurality of MAC-d flows from which the data for transmission was selected;
• and
• the controller is further configured to discard the selected data in response to a determination that the transmission counter is at least equal to a maximum number of transmissions associated with one of the plurality of MAC-d flows from which the data for transmission was selected.