Selecting and communicating buffer status information

1. A wireless transmit/receive unit (WTRU) comprising:

a transmitter configured to transmit, on a condition that the WTRU does not have a scheduling grant, a scheduling request over an uplink control channel, wherein the scheduling request is transmitted without buffered data and the WTRU is time synchronized with a network when transmitting the scheduling request;

a processor configured to select, on a condition that the WTRU does have the scheduling grant, a first type of buffer status information or a second type of buffer status information, wherein the first type of buffer status information or the second type of buffer status information indicate an amount of data buffered, and the second type of buffer status information has fewer bits and is a different format than the first type of buffer status information;

the transmitter further configured to transmit, over an uplink shared channel with buffered data, the selected first or the selected second type of buffer status information; and

the processor further configured to send, after a predetermined number of sub-frames after transmission of buffer status information of the first type, to send buffer status information of the first type.

2. The WTRU of claim 1 , wherein on a condition that acknowledgement/negative acknowledgement information or channel quality information is to be sent with the scheduling request, the scheduling request includes the acknowledgement/negative acknowledgement information or channel quality information on the uplink control channel.

3. The WTRU of claim 1 , wherein the second type of buffer status information omits information with respect to the first type of buffer status information.

4. The WTRU of claim 1 , wherein the WTRU utilizes long term evolution (LTE) transmissions.

5. The WTRU of claim 1 , wherein the second type of buffer status information is prioritized for selection over the first type of buffer status information.

6. The WTRU of claim 1 , wherein the second type of buffer status information is selected in response to not having enough available bits for the first type of buffer status information.

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

transmitting, by the WTRU on a condition that the WTRU does not have a scheduling grant, a scheduling request over an uplink control channel, wherein the scheduling request is transmitted without buffered data and the WTRU is time synchronized with a network when transmitting the scheduling request;

selecting, by the WTRU on a condition that the WTRU does have the scheduling grant, a first type of buffer status information or a second type of buffer status information, wherein the first type of buffer status information and the second type of buffer status information indicate an amount of data buffered, and the second type of buffer status information has fewer bits and is a different format than the first type of buffer status information;

transmitting, by the WTRU over an uplink shared channel with buffered data, the selected first or the selected second type of buffer status information; and

sending, by the WTRU after a predetermined number of sub-frames after transmission of buffer status information of the first type, buffer status information of the first type.

8. The method claim 7 , wherein on a condition that acknowledgement/negative acknowledgement information or channel quality information is to be sent with the scheduling request, the scheduling request is includes the acknowledgement/negative acknowledgement information or channel quality information on the uplink control channel.

9. The method of claim 7 , wherein the second type of buffer status information omits information with respect to the first type of buffer status information.

10. The method of claim 7 , further comprising transmitting utilizing long term evolution (LTE).

11. The method of claim 7 , wherein the second type of buffer status information is prioritized for selection over the first type of buffer status information.

12. The method of claim 7 , wherein the second type of buffer status information is selected in response to not having enough available bits for the first type of buffer status information.