HARQ-ACK Resource Selection Under PUSCH-UCI Collision
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Solution Overview
Problem
In wireless communication systems, the collision of high-priority Physical Uplink Shared CHannel (PUSCH) with low-priority Uplink Control Information (UCI) channels, such as PUCCH carrying Hybrid Automatic Repeat reQuest Acknowledgement (HARQ-ACK), leads to inefficient system performance due to the direct dropping of low-priority UCI, which reduces overall efficiency.
Innovation Solution
A method for multiplexing low-priority UCI onto high-priority PUSCH by determining appropriate time-frequency-resource blocks based on serving cell IDs and resource availability, ensuring that UCI of different priorities are multiplexed onto separate PUSCHs or layers, thereby avoiding resource shortages and enhancing transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If low-priority UCI is dropped directly when colliding with high-priority PUSCH, then high-priority transmission reliability is maintained, but overall system efficiency deteriorates
Solution Approach 1:
The patent applies local quality by differentiating resource allocation based on priority levels. Low-priority UCI is multiplexed onto high-priority PUSCH only when resources are available, while high-priority UCI maintains dedicated resources. This creates localized quality variations in resource allocation that preserve high-priority reliability while improving overall efficiency through selective multiplexing.
Solution Approach 2:
The patent implements dynamic resource allocation where the decision to multiplex low-priority UCI onto high-priority PUSCH depends on real-time resource availability. The system dynamically adjusts whether to multiplex based on whether the high-priority PUSCH has sufficient resources, transforming a static drop policy into a dynamic adaptive strategy that balances reliability and efficiency.
2Productivity
If multiple UCI of different priorities are multiplexed onto the same PUSCH, then resource utilization improves, but transmission reliability of high-priority UCI deteriorates
Solution Approach 1:
The patent applies segmentation by separating UCI multiplexing into distinct scenarios: high-priority UCI maintains dedicated PUSCH resources, while low-priority UCI is conditionally multiplexed only when high-priority resources are sufficient. This segmentation prevents resource conflicts and ensures high-priority reliability while allowing improved resource utilization through selective low-priority multiplexing.
Solution Approach 2:
The patent changes the parameter of resource allocation based on priority levels and availability. When high-priority PUSCH has sufficient resources, the system allows low-priority UCI multiplexing; when resources are tight, it prioritizes high-priority UCI exclusively. This parameter-based dynamic allocation resolves the contradiction between resource utilization and high-priority reliability.
3Productivity
If low-priority UCI is multiplexed onto high-priority PUSCH, then system efficiency improves, but resource management complexity increases
Solution Approach 1:
The patent applies preliminary action by establishing clear priority-based multiplexing rules in advance. The system pre-defines that low-priority UCI can be multiplexed onto high-priority PUSCH only when resources are available, eliminating the need for complex real-time negotiations. This preliminary rule-setting simplifies resource management while improving system efficiency through predictable multiplexing behavior.
Data Source
AI summary
Disclosure provides a method and device in a node for wireless communications. A first receiver, receives a first signaling; and a first transmitter, transmits a first signal in a target time-frequency-resource block, and the first signal carries a second bit block; herein, the first signaling is used to determine a first bit block; the first bit block comprises a second-type HARQ-ACK; the first bit block is used to generate the second bit block; the first time-frequency-resource block and the second time-frequency-resource block are respectively reserved for different bit blocks; a number of resources used to transmit a first-type HARQ-ACK in the first time-frequency-resource block is used to determine whether the target time-frequency-resource block is the first time-frequency-resource block or the second time-frequency-resource block; the first-type HARQ-ACK corresponds to a first index; the second-type HARQ-ACK corresponds to a second index; the first signaling indicates the second index.