Prohibiting unnecessary scheduling requests for uplink grants

摘要

Uplink transmission scheduling requests (SRs) may be prohibited for a lower priority data flow, logical channel group (e.g., VoIP configured with semi-persistent resource allocation), or other grouping but may still be triggered for higher priority traffic (e.g., data connected to a signaling radio bearer (SRB)). More efficient scheduling is also achieved by allowing an uplink transmission scheduler to distinguish between different priority flows or groups (e.g., LCGs) without a buffer status report (BSR), As a result, when a semi-persistent resource is scheled for the lower priority data, there is less delay for high priority data while eliminating uplink and downlink control signaling, i.e., fewer scheduling requests (SRs) and uplink grants, for the lower priority data.

主权项

1. A method relating to uplink communications from a wireless terminal to a network over a radio interface, the method implemented in the wireless terminal comprising:
detecting data to be transmitted by the wireless terminal to the network to trigger a scheduling request to the network for an uplink transmission; determining a priority associated with the detected data; transmitting an uplink transmission scheduling request to the network if the determined priority is a first priority; delaying transmission or not transmitting an uplink transmission scheduling request to the network if the determined priority is a second different priority, wherein the second priority data corresponds to a data flow configured not to send a scheduling request; determining that a future uplink radio resource is scheduled for use by the wireless terminal, transmitting the data using the future uplink radio resource when the determined priority is the second priority; starting a timer having a predetermined timer value associated with the second priority when the time remaining to the future uplink radio resource equals the predetermined timer value; determining if the timer times out; if the timer times out prior to the data being transmitted, transmitting the uplink transmission scheduling request to the network.