Method and apparatus for selectively enabling reception of downlink signaling channels

A method used by a wireless transmit/receive unit (WTRU), the method comprising:

• selectively enabling or disabling, by the WTRU, reception of downlink signaling;
• autonomously monitoring, by the WTRU, a buffer of the WTRU for data to transmit including times that reception of the downlink signaling is disabled;
• determining, by the WTRU, to transmit a channel allocation request based on the monitored buffer;
• autonomously transmitting, by the WTRU, a channel allocation request in response to the determination to transmit the channel allocation request;
• when reception of the downlink signaling is disabled and in response to the transmission of the channel allocation request, enabling, by the WTRU, reception of the downlink signaling to allow the WTRU to receive an uplink channel allocation;
• in response to receiving an uplink channel allocation, transmitting, by the WTRU, uplink data on an uplink channel;
• and
• when reception of the downlink signaling is disabled and in response to the transmitted uplink data, enabling, by the WTRU, reception of the downlink signaling to receive hybrid automatic repeat request (HARQ) feedback.

A wireless communication device comprising:

• a transmitter configured to transmit information to a wireless transmit/receive unit (WTRU) indicating first time periods that the WTRU is to enable reception;
• the transmitter further configured to transmit channel allocation information to the WTRU in the first time periods;
• a receiver configured to receive channel allocation requests from the WTRU;
• the transmitter further configured, in response to the received channel allocation requests, to transmit uplink channel allocations to the WTRU in second time periods, wherein the second time periods include time periods other than the first time periods;
• and
• the receiver further configured to receive uplink data on an uplink channel from the WTRU and to transmit hybrid automatic repeat request (HARQ) feedback to the WTRU in third time periods, wherein the third time periods include time periods other than the first time periods.