Multiplexing Overlapped Uplink Repetitions in 5G NR
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in handling overlapping uplink channel transmission repetitions with different priorities, leading to resource wastage and reduced reliability, particularly when lower priority repetitions carrying HARQ-ACK information are dropped, requiring additional resources for retransmission.
Innovation Solution
The technology enables multiplexing of uplink control information (UCI) and uplink channels with different priorities, allowing for the combination of high-priority and low-priority HARQ-ACK, SR, and CSI information within the same channel, thereby modifying overlapping uplink repetitions to enhance transmission efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lower priority uplink repetitions are dropped when overlapping with higher priority repetitions, then transmission reliability for high priority data is improved, but resource utilization deteriorates and additional retransmission resources are required
Solution Approach 1:
The patent merges multiple overlapping uplink repetitions with different priorities into a single multiplexed transmission. Instead of dropping lower priority repetitions and requiring separate retransmission resources, the system combines high priority and low priority HARQ-ACK information along with SR and CSI into unified PUCCH transmissions, eliminating resource wastage while maintaining reliability
Solution Approach 2:
The patent implements a universal handling mechanism that processes multiple types of uplink control information (HARQ-ACK, SR, CSI) from different priority levels within the same transmission framework. The UE determines multiplexing based on the types of information and priority levels, allowing a single transmission to serve multiple functions simultaneously
2Loss of information
If additional resources are allocated for retransmitting dropped low priority repetitions, then information completeness is improved, but system complexity and resource overhead increase
Solution Approach 1:
The patent combines the transmission of multiple priority levels into a single integrated process. The UE multiplexes high priority and low priority HARQ-ACK information, SR, and CSI into unified PUCCH transmissions, eliminating the need for separate retransmission resources and reducing system complexity while ensuring information completeness
Solution Approach 2:
The patent introduces dynamic multiplexing determination where the UE assesses the types of information and priority levels in real-time to decide on the multiplexing approach. This dynamic decision-making allows the system to adapt to different transmission scenarios without requiring fixed complex handling procedures for all cases
Data Source
AI summary
Apparatus, methods, and computer-readable media for multiplexing of overlapped uplink channel transmission repetitions are disclosed herein. A user equipment (UE) may determine that at least a portion of a first set of uplink channel transmission repetitions overlaps with at least a portion of a second set of uplink channel transmission repetitions. The UE may modify the first set of uplink channel transmission repetitions based on the second set of uplink channel transmission repetitions. A base station (BS) may transmit a first downlink transmission associated with the first set of uplink channel transmission repetitions that overlaps with at least a portion of a second set of uplink channel transmission repetitions associated with a second downlink transmission. The BS may receive a modified version of the first set of uplink channel transmission repetitions based on the second set of uplink channel transmission repetitions. Thus, the reliability of uplink repetitions can be increased.