Overlapping PUSCH Priority Grouping for Optimal Uplink Transmission
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Solution Overview
Problem
Existing methods for prioritizing overlapping Physical Uplink Shared Channels (PUSCHs) with differing priorities in NR-IIoT are inefficient, leading to suboptimal transmission outcomes due to dependency on the order of grant occurrence.
Innovation Solution
Implement methods for grouping overlapping grants based on priority, deprioritizing resources within specific durations, and prioritizing Scheduling Requests (SRs) to ensure optimal transmission regardless of grant order.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing prioritization methods for overlapping PUSCHs are used, then transmission order is determined by grant occurrence sequence, but transmission optimality deteriorates due to suboptimal outcomes
Solution Approach 1:
The patent applies preliminary action by performing grouping of overlapping grants based on priority levels before actual transmission scheduling. The UE groups grants into sets according to their priority relationships in advance, so when transmission decisions need to be made, the optimal transmission order is already determined by the pre-established groupings rather than by grant occurrence sequence. This preliminary organization eliminates the need for complex real-time prioritization decisions.
2Productivity
If grant-specific UL resources are processed individually, then processing simplicity is maintained, but spectral efficiency deteriorates due to resource wastage
Solution Approach 1:
The patent applies merging by combining multiple overlapping grant-specific UL resources into priority-based groups. Instead of processing each grant individually, the UE merges grants into groups where grants with the same priority level are grouped together. This merging enables more efficient resource utilization by allowing the UE to transmit on multiple grants within a group simultaneously or in optimized sequences, thereby improving spectral efficiency while the grouping structure itself manages the complexity.
Solution Approach 2:
The patent applies segmentation by dividing the set of overlapping grants into distinct priority-based groups. The UE segments grants into multiple groups according to their priority levels, where each group contains grants of a specific priority. This segmentation allows independent processing of each group, simplifying the overall processing complexity while enabling optimized transmission strategies for each segment, thereby improving spectral efficiency.
3Reliability
If deprioritization of overlapping resources is not implemented, then resource utilization is maximized, but transmission priority reliability deteriorates
Solution Approach 1:
The patent applies local quality by implementing different transmission strategies for different priority groups. High-priority grants receive preferential treatment through guaranteed transmission opportunities, while lower-priority grants within overlapping groups are deprioritized or deferred. This local differentiation of transmission quality based on priority level ensures that critical transmissions are reliably delivered while avoiding energy waste on lower-priority transmissions that would interfere with high-priority ones.
Data Source
AI summary
Handling overlapping of multiple physical uplink shared channels (a combination of one or more PUSCHs and PUCCHs) is disclosed herein. In one embodiment, a method performed by a wireless device for handling an overlapping group of transmissions with differing transmission priorities comprises determining that at least one grant-specific uplink (UL) resource of multiple grant-specific UL resources overlaps with two other grant-specific UL resources of the plurality of grant-specific UL resources. The method further comprises dividing overlapping grant-specific UL resources of the multiple grant-specific UL resources into a plurality of groups such that each group of the plurality of groups only contains grant-specific UL resources that are non-overlapping. The method also comprises identifying, from the plurality of groups, a group that contains a grant-specific UL resource having a highest transmission priority. The method additionally comprises performing a transmission associated with the grant-specific UL resources within the identified group.