Wireless communication method and apparatus for selecting between transmission of short-version and full-version uplink scheduling requests

A wireless transmit/receive unit (WTRU) that has data to transmit to the Node-B, but needs to have a scheduling grant for uplink (UL) data transmission, the WTRU comprising:

• at least one antenna;
• a receiver in communication with the antenna, the receiver being configured to receive, via the antenna, a scheduling grant transmitted by a Node-B over a downlink (DL) channel;
• a transmitter in communication with the antenna, the transmitter being configured to transmit to the Node-B, via the antenna, a UL scheduling request over a UL channel;
• a data buffer;
• and
• a scheduling request processor in communication with the data buffer, the transmitter and the receiver, the scheduling request processor being configured to determine whether to transmit to the Node-B a short-version UL scheduling request a full-version UL scheduling request on a condition that there is buffered data in the data buffer waiting to be transmitted in a UL transmission to the Node-B, wherein the short-version UL scheduling request is a one-bit indicator or a multi-bit indicator, wherein the short-version UL scheduling request indicates the amount of scheduling grant or resources requested, and wherein the full-version UL scheduling request includes detailed information related to at least one of a WTRU buffer status and a WTRU link budget, and wherein the WTRU transmits the full-version UL scheduling request on a condition that at least a predetermined number of sub-frames elapsed since the last time a full-version UL scheduling request was transmitted and the WTRU has a scheduling grant.