Scheduling Request Transmission via PUCCH Preemption
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Solution Overview
Problem
Current methods for transmitting scheduling requests in communication technology face delays when PUCCH resources overlap with UL-SCH resources or measurement gaps, failing to meet low-latency requirements for services that require immediate resource allocation.
Innovation Solution
The method involves determining overlaps between PUCCH transmissions for scheduling requests and other operations, suspending the overlapping operations, and transmitting the scheduling requests through the PUCCH to secure uplink resources promptly, ensuring timely buffer status reports and meeting service delay requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the SR is transmitted only after data transmission through UL-SCH or after measurement gap ends, then resource conflicts are avoided, but transmission delay increases and low-latency service requirements cannot be met
Solution Approach 1:
The patent implements dynamic priority-based scheduling where the SR transmission decision adapts based on service type and QoS requirements. High-priority SRs can preempt ongoing UL-SCH transmissions or measurement gaps, while low-priority SRs follow traditional waiting behavior. This dynamic approach resolves the contradiction by allowing time-critical SRs to break through the delay caused by resource conflict avoidance rules.
Solution Approach 2:
The patent changes the parameter of SR transmission timing based on service characteristics and QoS parameters. By introducing priority levels and QoS-based thresholds, the system can adjust transmission behavior: high-priority services trigger immediate SR transmission even during UL-SCH or measurement gaps, while normal services maintain the traditional wait-for-resources approach. This parameter-based differentiation resolves the universal delay problem.
2Productivity
If the PUCCH resource for SR overlaps with UL-SCH resource or measurement gap, then resource utilization is optimized, but SR transmission is delayed until overlap resolution
Solution Approach 1:
The patent performs preliminary evaluation of SR priority and QoS requirements before determining transmission timing. When an SR is triggered, the system pre-assesses whether it belongs to a low-latency service type. If so, the SR is transmitted immediately on the PUCCH resource even if it overlaps with UL-SCH or measurement gap, rather than waiting for the overlap to resolve. This preliminary action based on priority assessment resolves the contradiction by preventing delay before it occurs.
3Stability of the object's composition
If SR transmission waits for UL-SCH data transmission completion, then interference between channels is avoided, but uplink resource allocation delay increases
Solution Approach 1:
The patent segments SR transmission into different priority levels and handles them differently. High-priority SRs are transmitted immediately on PUCCH regardless of UL-SCH overlap, while low-priority SRs wait for UL-SCH completion. This segmentation allows the system to maintain channel stability for normal traffic while providing expedited paths for time-critical services, resolving the contradiction between stability and speed.
Data Source
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AI summary
The present invention relates to a method of transmitting a scheduling request, applied to user equipment, includes: determining whether there is an overlap in time-domain between a physical uplink control channel transmission for a scheduling request corresponding to a first logical channel by the user equipment and another operation of the user equipment; and transmitting, in response to that there is the overlap, the scheduling request corresponding to the first logical channel through a physical uplink control channel and suspending said other operation. According to the embodiments of the present invention, when the user equipment determines that there is the overlap in time-domain between the physical uplink control channel transmission for the scheduling request corresponding to the first logical channel and the other operation, the other operation can be suspended and the scheduling request corresponding to the first logical channel can be transmitted through the physical uplink control channel, so that uplink resources requested by the scheduling request can be obtained as soon as possible to transmit a buffer status report, thereby ensuring a lower delay required by a service corresponding to the first logical channel.