Dynamic HARQ-ACK Codebook for Network-Controlled Repeaters
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing HARQ-ACK feedback for network-controlled repeaters, particularly in scenarios where beamforming and dynamic coverage enhancement are required, leading to inefficiencies in signal forwarding and interference management.
Innovation Solution
Implementing a dynamic HARQ-ACK codebook for network-controlled repeaters, configured with three HARQ-ACK groups, to manage feedback corresponding to PDCCH, PDSCH, and radio link/beam quality, allowing for efficient signal forwarding and interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a dynamic HARQ-ACK codebook with three HARQ-ACK groups is implemented for network-controlled repeaters, then the efficiency of signal forwarding and interference management is improved, but the device complexity increases
Solution Approach 1:
The HARQ-ACK codebook is segmented into three distinct groups: first HARQ-ACK group for PDCCH transmissions, second HARQ-ACK group for PDSCH transmissions, and third HARQ-ACK group for radio link/beam quality measurements. This segmentation allows each group to be managed independently with specific configurations, improving signal forwarding efficiency while organizing the complexity into manageable segments.
Solution Approach 2:
The patent implements a dynamic HARQ-ACK codebook that can adapt its structure and content based on actual transmission conditions. The codebook dynamically adjusts which HARQ-ACK groups are included and their configurations, allowing the system to optimize performance for varying signal forwarding scenarios while maintaining organized complexity through defined groups.
2Area of stationary object
If a dynamic HARQ-ACK codebook with three HARQ-ACK groups is implemented for network-controlled repeaters, then coverage is improved, but the device complexity increases
Solution Approach 1:
By dividing the HARQ-ACK feedback into three specialized groups, the system can independently optimize each group for different coverage scenarios. The third group specifically handles radio link/beam quality measurements, enabling enhanced coverage through dedicated beam management while keeping the overall codebook structure organized and manageable.
Solution Approach 2:
Each HARQ-ACK group is configured with specific local properties tailored to its function. The third group focuses on beam quality measurements with specific configurations for radio link monitoring, allowing localized optimization for coverage enhancement without requiring complete reconfiguration of the entire HARQ-ACK system.
3Loss of time
If a dynamic HARQ-ACK codebook with three HARQ-ACK groups is implemented for network-controlled repeaters, then latency is reduced, but the device complexity increases
Solution Approach 1:
The dynamic HARQ-ACK codebook adapts its configuration based on current transmission conditions, allowing the system to optimize feedback timing and reduce latency when conditions permit. The dynamic nature enables flexible adjustment of codebook structure to minimize feedback delay while maintaining organized complexity through the defined three-group framework.
Data Source
AI summary
Methods and apparatus are provided for wireless communication performed by a network-controlled repeater (NCR) configured to forward downlink (DL) channels or signals from a base station to a user equipment (UE). The NCR determines a duration for which hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback is configured. The NCR determines a number of measurements of the DL channels or signals for which a single HARQ-ACK bit is reported. The NCR determines, based on the number of measurements and a comparison with a success threshold for each of the measurements, an acknowledgement (ACK) or negative acknowledgement (NACK) for each configured HARQ-ACK bit in a first sequence of HARQ-ACK bits. The NCR constructs a dynamic HARQ-ACK codebook to send to the base station. The dynamic HARQ-ACK codebook includes at least the first sequence of HARQ-ACK bits.