PUCCH Repetition Resource Allocation Across Slot Types
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in physical uplink control channel (PUCCH) resource allocation across different slot types, leading to latency and suboptimal use of signaling resources, particularly in scenarios where PUCCH repetition is required.
Innovation Solution
The method involves receiving multiple PUCCH resource indicators from a base station, allowing user equipment (UE) to determine and transmit PUCCH instances in appropriate slots based on their resource configurations and slot types, thereby reducing latency and optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PUCCH repetition is configured using existing resource allocation methods, then reliability is improved through repeated transmissions, but latency increases and resource utilization becomes suboptimal
Solution Approach 1:
The patent segments the PUCCH repetition resource allocation into two distinct parts: a first resource indicator for the first PUCCH instance and a second resource indicator for the second PUCCH instance. This segmentation allows independent optimization of each repetition's timing and resources, enabling closer slot placement while maintaining reliability through repeated transmissions.
Solution Approach 2:
The patent introduces dynamic resource allocation where the second PUCCH resource indicator can be configured to point to resources in adjacent or closer slots compared to traditional configurations. This dynamic approach allows the system to adaptively select optimal slot placements based on current channel conditions and traffic requirements, reducing latency while preserving reliability.
2Adaptability or versatility
If PUCCH resources are allocated in non-adjacent slots, then resource availability is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent utilizes the time dimension more effectively by configuring PUCCH repetition instances in adjacent or closer slots rather than widely separated slots. The second resource indicator enables placement in the next available slot or even the same slot, transforming the time resource utilization from sparse to dense, thereby improving overall resource efficiency while maintaining adaptability through flexible resource indicator configuration.
3Device complexity
If a single PUCCH resource indicator is used for repetition, then device complexity is reduced, but adaptability to different slot types deteriorates
Solution Approach 1:
The patent implements a universal resource indication mechanism where the second resource indicator can universally point to PUCCH resources across different slot types (uplink slots, downlink slots, special slots). This multi-functional indicator system allows the same indication mechanism to adapt to various slot configurations without increasing UE processing complexity, as the interpretation rules remain consistent across different slot types.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, a first physical uplink control channel (PUCCH) resource indicator, which indicates a first PUCCH resource for a first instance of a repeated PUCCH message, and a second PUCCH resource indicator, which indicates a second PUCCH resource for a second instance of the repeated PUCCH message. The UE may determine a first slot for the first instance and a second slot for the second instance, and transmit the first instance in the first PUCCH resource in the first slot and the second instance in the second PUCCH resource in the second slot. Numerous other aspects are described.