A wireless transmit/receive unit, WTRU, comprising: means for transmitting a rate request with scheduling information to a Node-B for uplink transmission utilizing an enhanced uplink dedicated physical data channel, E-DPDCH, and an enhanced uplink dedicated physical control channel, E-DPCCH; means for receiving, from the Node-B, a scheduling assignment via an Absolute Grant Channel, AGCH, or via a Relative Grant Channel, RGCH, to control uplink access and maximum transmission rate for the WTRU; means for transmitting, to the Node-B, uplink, UL, data via the E-DPCCH and the EDPDCH; means for receiving radio bearers utilizing a dedicated physical data channel, DPDCH; means for receiving radio bearers utilizing a high speed physical downlink shared channel, HS-PDSCH; means for determining a channel quality of a dedicated physical control channel, DPCCH, associated with the dedicated physical data channel or of a high speed shared control channel, HS-SCCH, associated with the shared channel; means for determining that a radio link failure has occurred when: the WTRU does not receive scheduling assignments or Hybrid Automatic Repeat Request, HARQ, feedback after sending the rate request, or the determined channel quality of the high speed shared control channel, HS-SCCH, is below a predetermined threshold for a predetermined period of time; or the determined channel quality of the dedicated physical control channel, DPCCH, is below a predetermined threshold; and means for invoking a procedure to recover a radio link when a radio link failure has been declared. means for transmitting a rate request with scheduling information to a Node-B for uplink transmission utilizing an enhanced uplink dedicated physical data channel, E-DPDCH, and an enhanced uplink dedicated physical control channel, E-DPCCH; means for receiving, from the Node-B, a scheduling assignment via an Absolute Grant Channel, AGCH, or via a Relative Grant Channel, RGCH, to control uplink access and maximum transmission rate for the WTRU; means for transmitting, to the Node-B, uplink, UL, data via the E-DPCCH and the EDPDCH; means for receiving radio bearers utilizing a dedicated physical data channel, DPDCH; means for receiving radio bearers utilizing a high speed physical downlink shared channel, HS-PDSCH; means for determining a channel quality of a dedicated physical control channel, DPCCH, associated with the dedicated physical data channel or of a high speed shared control channel, HS-SCCH, associated with the shared channel; means for determining that a radio link failure has occurred when: the WTRU does not receive scheduling assignments or Hybrid Automatic Repeat Request, HARQ, feedback after sending the rate request, or the determined channel quality of the high speed shared control channel, HS-SCCH, is below a predetermined threshold for a predetermined period of time; or the WTRU does not receive scheduling assignments or Hybrid Automatic Repeat Request, HARQ, feedback after sending the rate request, or the determined channel quality of the high speed shared control channel, HS-SCCH, is below a predetermined threshold for a predetermined period of time; or the determined channel quality of the dedicated physical control channel, DPCCH, is below a predetermined threshold; and means for invoking a procedure to recover a radio link when a radio link failure has been declared.