HARQ-ACK Codebook Transmission for Multi-TRP Signaling Overhead
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Solution Overview
Problem
In communication systems with multiple transmission reception points (TRPs) lacking ideal backhaul, the challenge is to manage hybrid automatic repeat request acknowledge (HARQ-ACK) feedback and reduce signaling overhead while minimizing interference among TRPs and user equipment (UE).
Innovation Solution
An information transmission method and device that determines and transmits a hybrid automatic repeat request acknowledge (HARQ-ACK) codebook based on frequency domain bandwidth sets and high-layer signaling information, reducing signaling overhead and interference by grouping and separating channels and signals among different communication nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple PDCCHs are monitored in a cell, then the probability of successfully receiving downlink control information is improved, but the power consumption of the terminal device increases
Solution Approach 1:
The patent extracts and monitors only the essential downlink control information from multiple PDCCH candidates, rather than processing all PDCCH messages equally. The terminal device identifies and focuses on PDCCH messages that contain actual control information, filtering out redundant monitoring attempts, thereby reducing power consumption while maintaining reception reliability.
Solution Approach 2:
The patent implements partial monitoring by configuring the terminal to monitor a subset of PDCCH candidates rather than all possible candidates. The network device controls the quantity of PDCCH candidates based on terminal capability and service requirements, applying partial action (monitoring only necessary candidates) to balance reliability improvement with power consumption reduction.
2Reliability
If the quantity of PDCCH candidates is increased, then the coverage of downlink control information is improved, but the processing complexity of the terminal device increases
Solution Approach 1:
The patent dynamically adjusts the quantity of PDCCH candidates based on terminal device capability and service requirements. The network device configures different numbers of candidates for different terminals or different service types, making the system adaptive rather than static. This dynamic configuration optimizes coverage while controlling processing complexity according to actual needs.
Solution Approach 2:
The patent segments the PDCCH monitoring space into different candidate sets with different complexities. Terminal devices with higher processing capabilities are assigned larger candidate sets for better coverage, while devices with limited capabilities receive smaller sets. This segmentation allows the system to achieve good coverage where possible without universally increasing complexity for all terminals.
3Reliability
If blind detection is performed on all PDCCH candidates, then the reliability of control information reception is improved, but the time consumption increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the terminal device with information about which PDCCH candidates are likely to contain control information. The network device provides advance guidance on candidate selection based on scheduling decisions, allowing the terminal to perform targeted blind detection rather than exhaustive search, thus reducing time consumption while maintaining reliability.
Data Source
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AI summary
Disclosed are an information transmission method and device, an information determination method and device, a signaling information transmission method and device, a parameter acquisition method and device, and a storage medium. The information transmission method includes: second information corresponding to a hybrid automatic repeat request acknowledge (HARQ-ACK) codebook to be transmitted is determined; the HARQ-ACK codebook to be transmitted is determined according to the determined second information; and the determined HARQ-ACK codebook is transmitted; where the second information includes at least one of: a frequency domain bandwidth set, first information, or high-layer signaling information.