Method and apparatus for minimizing uplink scheduling requests
A wireless transmit/receive unit (WTRU) comprises a processor configured to buffer data for uplink transmission. The processor is configured to trigger a first scheduling request. The processor is configured to start a timer based on the buffered data. A transmitter is configured to transmit the first scheduling request to a network. The processor is configured, in response to receipt of an uplink grant sufficient to transmit the buffered data, to stop the timer. The processor is configured while the timer is running, to not have the transmitter transmit another scheduling request The processor is configured, after the timer expires, to have the transmitter transmit a second scheduling request to the network.
1. A wireless transmit/receive unit (WTRU) comprising:
a receiver;
a transmitter; and
a processor, wherein:
the receiver and the processor are configured to receive configuration information from a network, wherein the configuration information indicates a plurality of timer values, wherein each timer value is associated with at least one data flow;
the processor is further configured to trigger a first scheduling request in response to the WTRU having uplink data to send and not having resources to send the uplink data;
the transmitter and the processor are configured to transmit the first scheduling request to the network;
the processor is further configured to start a timer in response to the transmitted first scheduling request;
the processor is further configured to, in response to receipt of an uplink grant to transmit the uplink data, stop the timer;
the transmitter and the processor are further configured to, while the timer is running, not transmit another scheduling request based on the uplink data to send; and
the transmitter and the processor are further configured to, when the timer is not running, transmit a second scheduling request to the network.
2. The WTRU of claim 1 , wherein the first scheduling request is transmitted over an uplink signaling channel.
3. The WTRU of claim 1 , wherein the timer is based on one of the received plurality of timer values.
4. The WTRU of claim 1 , wherein the first scheduling request is a request for uplink resources to send a new transmission.
5. The WTRU of claim 1 , wherein the second scheduling request is a request for uplink resources to send a new transmission.
6. A method implemented by a wireless transmit/receive unit (WTRU) comprising:
receiving configuration information from a network, wherein the configuration information indicates a plurality of timer values, wherein each timer value is associated with at least one data flow;
triggering a first scheduling request in response to the WTRU having uplink data to send and not having resources to send the uplink data;
transmitting the first scheduling request to the network;
starting a timer in response to transmitting the first scheduling request;
stopping the timer in response to receiving an uplink grant to transmit the uplink data;
refraining from transmitting another scheduling request based on the uplink data to send while the timer is running; and
transmitting a second scheduling request to the network when the timer is not running.
7. The method of claim 6 , wherein the first scheduling request is transmitted over an uplink signaling channel.
8. The method of claim 6 , wherein the timer is based on one of the received plurality of timer values.
9. The method of claim 6 , wherein the first scheduling request is a request for uplink resources to send a new transmission.
10. The method of claim 6 , wherein the second scheduling request is a request for uplink resources to send a new transmission.