HARQ-ACK Feedback Management in Wireless Nodes
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing Hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback, particularly in energy-saving scenarios, leading to increased overhead and complexity, which affects network performance and energy consumption.
Innovation Solution
A method involving monitoring a PDCCH associated with a target serving cell during a target monitoring occasion and transmitting a target HARQ-ACK bit block, where the configuration change occurs within a same active BWP, with the decision to generate or skip HARQ-ACK bits based on the sequence between the target monitoring occasion and a reference change occasion, reducing overhead and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ-ACK feedback is transmitted for all monitoring occasions, then feedback completeness is improved, but feedback overhead increases
Solution Approach 1:
The patent extracts and removes unnecessary HARQ-ACK feedback bits corresponding to monitoring occasions that occur before the active BWP configuration change. By identifying and eliminating these redundant feedback requirements, the system reduces feedback overhead while maintaining complete feedback for relevant monitoring occasions that occur after the configuration change.
Solution Approach 2:
The patent changes the parameter of feedback generation based on the temporal relationship between monitoring occasions and the configuration change point. The system dynamically adjusts which monitoring occasions generate HARQ-ACK feedback based on whether they occur before or after the active BWP configuration change, thereby optimizing the balance between feedback completeness and overhead reduction.
2Reliability
If HARQ-ACK feedback is transmitted for all monitoring occasions, then feedback completeness is improved, but system complexity increases
Solution Approach 1:
The patent extracts and removes the complex logic required to handle feedback for monitoring occasions before the configuration change. By eliminating these problematic feedback requirements, the system reduces processing complexity while maintaining straightforward feedback handling for monitoring occasions after the configuration change.
Solution Approach 2:
The patent applies preliminary action by establishing the configuration change point as a reference before processing feedback requirements. This pre-established reference point simplifies the subsequent determination of which monitoring occasions require feedback, reducing system complexity through clear temporal categorization.
3Use of energy by moving object
If network energy saving is enhanced, then energy consumption is reduced, but HARQ-ACK feedback management becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-establishing the active BWP configuration change as a reference point before processing HARQ-ACK feedback. This pre-prepared reference simplifies the feedback management logic in energy-saving scenarios, reducing complexity while enabling effective feedback handling during network energy saving operations.
Solution Approach 2:
The patent changes the feedback generation parameter based on the temporal relationship with the configuration change point. This parameter adjustment simplifies feedback management in energy-saving scenarios by providing clear criteria for determining which monitoring occasions require feedback, thereby reducing management complexity while maintaining energy efficiency.
Data Source
AI summary
The present application provides a method and device in a node for wireless communications. A first receiver monitors a PDCCH at least associated with a target serving cell in a target monitoring occasion, the target serving cell is a configured serving cell; a first transmitter transmits a target HARQ-ACK bit block; wherein a first-type configuration change comprises a change in frequency-band resources, and the first-type configuration change occurs within a same active BWP; a reference change occasion comprises time occupied by the first-type configuration change, and the target HARQ-ACK bit block depends on a sequence between the target monitoring occasion and the reference change occasion.