Dynamic UCI Field Length for HARQ-ACK Feedback Configuration
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Solution Overview
Problem
The current design of UCI fields in LTE wireless communication systems is inadequate for supporting multiple HARQ-ACK feedback configurations, leading to increased signaling overhead when trying to accommodate two HARQ-ACK feedback configurations within a single DCI format.
Innovation Solution
The method involves determining the length of a first information field in the DCI based on the received HARQ-ACK feedback configurations, allowing the field to support multiple HARQ-ACK feedback configurations dynamically, thereby reducing signaling overhead by enabling multiple configurations to share a single field related to uplink control feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UCI field design supports multiple HARQ-ACK feedback configurations, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The UCI field is designed to serve multiple HARQ-ACK feedback configurations through a unified structure. The field can dynamically adapt to different configuration types (e.g., Type-1 and Type-2 codebooks) without requiring separate dedicated fields for each configuration type, thereby achieving multi-functionality while maintaining reasonable complexity
Solution Approach 2:
The UCI field length is made dynamic rather than fixed, allowing it to adjust based on the specific HARQ-ACK feedback configuration being used. This dynamic adaptation enables the system to support multiple configurations efficiently by allocating field length according to actual needs, avoiding the complexity of designing separate static fields for each configuration
2Reliability
If separate fields are allocated for each HARQ-ACK feedback configuration, then the reliability is improved, but the loss of information increases due to increased signaling overhead
Solution Approach 1:
Multiple HARQ-ACK feedback configurations share a single UCI field rather than having separate fields for each configuration. This merging approach reduces the total signaling overhead while maintaining the ability to reliably transmit HARQ-ACK feedback for multiple configurations through the shared field
Solution Approach 2:
The shared UCI field is designed to universally support multiple HARQ-ACK feedback configurations through dynamic length adjustment and configurable interpretation, ensuring that reliability is maintained across different configuration types without requiring redundant separate fields
Data Source
AI summary
A method for determining an uplink control information (UCI) field and related apparatus are provided. The method includes the following. A terminal receives at least two Hybrid Automatic Repeat reQuest-acknowledgement (HARQ-ACK) feedback configurations. The terminal receives first downlink control information (DCI), where a first information field in the first DCI has a length determined by the at least two HARQ-ACK feedback configurations, and the first information field is a field related to uplink control feedback in the first DCI.