GC-PDCCH Multiplexing of CG-SDT Feedback for Uplink Priority Handling
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing configured grant small data transfer (CG-SDT) response transmissions and uplink priority handling, particularly in scenarios involving multiple user equipment (UEs), leading to increased signaling overhead and resource wastage.
Innovation Solution
Implementing a group common physical downlink control channel (GC-PDCCH) to multiplex CG-SDT feedback for multiple UEs, reducing signaling overhead by transmitting a single GC-PDCCH that includes feedback for all UEs in a CG-SDT occasion group, and employing conflict resolution rules to handle overlapping uplink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual PDCCH feedback is transmitted to each UE for CG-SDT, then feedback reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent combines individual feedback messages for multiple UEs into a single group common PDCCH (GC-PDCCH) transmission. The GC-PDCCH contains feedback information for multiple UEs multiplexed together, reducing the number of separate PDCCH transmissions needed while maintaining feedback delivery to each individual UE.
Solution Approach 2:
The GC-PDCCH serves multiple functions simultaneously: it provides feedback to multiple UEs in a single transmission, reduces signaling overhead, and maintains individual UE feedback reliability through multiplexing techniques. This multi-functional approach resolves the contradiction between reliability and overhead.
2Productivity
If multiple UEs transmit uplink data in the same CG-SDT occasion, then resource utilization is improved, but transmission conflicts increase
Solution Approach 1:
The patent implements conflict resolution rules that are predetermined and configured before CG-SDT transmissions occur. These rules establish priority relationships and resolution mechanisms in advance, allowing UEs to autonomously resolve conflicts without real-time intervention, thus maintaining both high resource utilization and transmission reliability.
Solution Approach 2:
The system changes transmission parameters dynamically based on conflict resolution outcomes. When conflicts are detected in CG-SDT occasions, UEs adjust their transmission parameters according to predefined rules, such as prioritizing certain UEs or rescheduling transmissions, thereby maintaining reliable communication while maximizing resource utilization.
3Quantity of substance
If CG-SDT feedback is multiplexed in GC-PDCCH, then signaling overhead is reduced, but feedback processing complexity increases
Solution Approach 1:
The patent segments the feedback information for multiple UEs into distinct fields or structures within the GC-PDCCH. This segmentation allows receiving UEs to efficiently extract their specific feedback information without processing the entire message, reducing the effective processing complexity despite the multiplexed structure.
Solution Approach 2:
The GC-PDCCH structure acts as an intermediary that organizes multiplexed feedback information in a standardized format. This intermediary structure simplifies processing by providing clear delimiters and identification mechanisms, allowing UEs to efficiently locate and process their specific feedback without being overwhelmed by the complexity of multiplexed data.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit uplink data to a base station in a configured grant small data transfer (CG-SDT) occasion in a CG-SDT occasion group associated with multiple UEs. The UE may receive a group common physical downlink control channel (GC-PDCCH) multiplexing CG-SDT feedback targeted to the multiple UEs associated with the CG-SDT occasion group. In some aspects, the CG-SDT feedback multiplexed in the GC-PDCCH includes CG-SDT feedback for the uplink data transmitted in the CG-SDT occasion. Numerous other aspects are provided.