UTO-UCI Bitmap Reporting for Unused CG PUSCH Occasions
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Solution Overview
Problem
Existing wireless communication systems face limitations in communication flexibility and efficiency, particularly in handling HARQ-ACK feedback with different priorities and multiplexing of deferred SPS HARQ-ACK, leading to inefficiencies and potential data loss.
Innovation Solution
Implementing joint coding and multiplexing techniques for HARQ-ACK with different priorities, including methods for deferred SPS HARQ-ACK, using UTO-UCI to efficiently manage PUSCH occasions and reduce collisions, and utilizing UTO-UCI to indicate unused transmission occasions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PUSCH occasions are configured for CG transmission, then communication capacity and resource utilization are improved, but complexity in managing HARQ-ACK feedback and determining unused occasions increases
Solution Approach 1:
The patent segments the HARQ-ACK feedback by introducing separate UTO-UCI feedback for each PUSCH occasion. Instead of managing all HARQ-ACK feedback uniformly, the system divides it into individual occasion-specific feedback units, allowing independent tracking and reporting of unused occasions. This segmentation reduces the complexity of managing aggregated feedback while maintaining high communication capacity through multiple occasions.
Solution Approach 2:
The patent introduces UTO-UCI as an intermediary mechanism between the UE and gNB for reporting unused PUSCH occasions. This intermediary feedback structure simplifies the management complexity by providing a standardized, dedicated channel for reporting unused occasions, rather than requiring complex logic to interleave UTO information with regular HARQ-ACK feedback.
2Productivity
If joint coding and multiplexing techniques are implemented for HARQ-ACK with different priorities, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by differentiating the treatment of HARQ-ACK feedback based on priority levels. High-priority and low-priority HARQ-ACK feedback are handled with different coding and multiplexing strategies. This allows the system to optimize communication efficiency for each priority level independently, applying more robust joint coding where needed while simplifying processing where less critical, thereby balancing efficiency gains with complexity management.
Solution Approach 2:
The patent introduces dynamic adaptation in the joint coding and multiplexing process, where the coding strategy and resource allocation are adjusted based on the priority of the HARQ-ACK feedback and the current system state. This dynamic approach allows the system to achieve high communication efficiency under varying conditions without requiring permanently complex device architecture, as the complexity is activated only when and where needed.
3Productivity
If UTO-UCI is used to indicate unused transmission occasions, then resource utilization is improved, but information overhead increases
Solution Approach 1:
The patent merges the UTO-UCI feedback with the existing HARQ-ACK feedback structure. Instead of transmitting UTO information separately as independent overhead, the unused occasion indicators are combined with the regular HARQ-ACK feedback in the same uplink transmission. This merging approach allows the system to report resource utilization status (unused occasions) without significantly increasing overall information overhead, as the feedback is piggybacked on existing control channel resources.
Data Source
AI summary
A user equipment (UE) is described. The UE includes receiving circuitry configured to receive a configuration for a configured grant (CG) with multiple physical uplink shared channel (PUSCH) transmission occasions in a CG period, and a configuration for the unused transmission PUSCH occasion uplink control information (UTO-UCI). The UE also includes transmitting circuitry configured to transmit the UTO-UCI on a CG PUSCH, wherein the UTO-UCI provides a bitmap comprising a bit corresponding to a transmission occasion (TO) within a time duration.