Communicating scheduling requests in a wireless network
A wireless transmit/receive unit (WTRU) may generate, on a condition that a scheduling request and an acknowledgement/negative acknowledgement (ACK/NACK) or channel quality information (CQI) are to be transmitted, a message having the scheduling request and the ACK/NACK or the CQI. The message may be transmitted over a physical uplink control channel. The WTRU may determine whether scheduling request information, including buffer status, is to be transmitted. The scheduling request information may be transmitted as in-band information.
1. A wireless transmit/receive unit (WTRU) comprising:
a transmitter; and
a processor;
the processor is configured to determine that acknowledgement/negative acknowledgement (ACK/NACK) information and channel quality information (CQI) are to be transmitted in a physical uplink control channel transmission;
the processor is further configured to determine that a scheduling request is to be transmitted;
the transmitter is configured to transmit a message in a physical uplink control channel transmission in response to the determination that ACK/NACK information and CQI are to be transmitted in a physical uplink control channel transmission and in response to the determination that the scheduling request is to be transmitted, wherein, based on an amount of information that the message is capable of carrying, the transmitted message includes the scheduling request, the ACK/NACK information, and at least a portion of the CQI;
the processor is further configured to determine that scheduling request information, including information indicating information indicating a buffer status, is to be transmitted; and
the transmitter is further configured to transmit, in a physical uplink shared channel transmission, the scheduling request information including the information indicating the buffer status as in-band information.
2. The WTRU of claim 1 , wherein the scheduling request is needed for transmission of buffered data before a predetermined delay.
3. The WTRU of claim 1 , wherein the message is transmitted in a sub-frame as L1 or L2 control information.
4. The WTRU of claim 1 wherein the message is transmitted on a condition that a scheduling grant is insufficient for buffered data.
5. The WTRU of claim 1 , wherein status information or quality of service (QoS) requirements of the WTRU are transmitted along with the information indicating the buffer status.
6. The WTRU of claim 1 , wherein the WTRU utilizes Long-Term Evolution (LTE) transmissions.
7. The WTRU of claim 1 , wherein the scheduling request is prioritized over the information indicating the buffer status.
8. The WTRU of claim 1 , wherein the processor is further configured to send, after a predetermined number of sub-frames after transmission of the message, the information indicating the buffer status.
9. A method performed by a wireless transmit/receive unit (WTRU), the method comprising:
determining that acknowledgement/negative acknowledgement (ACK/NACK) information and channel quality information (CQI) are to be transmitted in a physical uplink control channel transmission;
determining that a scheduling request is to be transmitted;
generating a message, the message comprising, based on an amount of information that the message is capable of carrying, the scheduling request and at least a portion of the ACK/NACK information and a portion of the CQI;
transmitting a message in a physical uplink control channel transmission, in response to the determination that ACK/NACK information and CQI are to be transmitted in a physical uplink control channel transmission and in response to the determination that the scheduling request is to be transmitted, wherein based on an amount of information that the message is capable of carrying, the transmitted message includes the scheduling request, the ACK/NACK information, and at least a portion of the CQI;
determining that scheduling request information, including information indicating a buffer status, is to be transmitted; and
transmitting, in a physical uplink shared channel transmission, the scheduling request information including the information indicating the buffer status as in-band information.
10. The method of claim 9 , wherein the scheduling request is needed for transmission of buffered data before a predetermined delay.
11. The method of claim 9 , wherein the message is transmitted in a sub-frame as L1 or L2 control information.
12. The method of claim 9 wherein the message is transmitted on a condition that a scheduling grant is insufficient for buffered data.
13. The method of claim 9 , wherein status information or quality of service (QoS) requirements of the WTRU are transmitted along with the information indicating the buffer status.
14. The method of claim 9 , wherein the WTRU utilizes Long-Term Evolution (LTE) transmissions.
15. The method of claim 9 , wherein the scheduling request is prioritized over the information indicating the buffer status.
16. The method of claim 9 further comprising sending, after a predetermined number of sub-frames after transmission of the message, the information indicating the buffer status.