Uplink HARQ-ACK Multiplexing Under PUSCH Resource 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 the appropriate resource allocation based on serving cell ID and resource availability, ensuring that UCI of different priorities are transmitted on separate or distinct PUSCHs in different serving cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If low-priority UCI is directly dropped when colliding with high-priority PUSCH, then high-priority transmission reliability is improved, but system overall efficiency deteriorates
Solution Approach 1:
The patent merges low-priority UCI with high-priority PUSCH transmission by multiplexing the UCI onto the PUSCH resources. This allows both high-priority data and low-priority control information to be transmitted simultaneously without dropping either, thereby improving system efficiency while maintaining high-priority reliability through priority-based resource allocation.
Solution Approach 2:
The high-priority PUSCH is designed to serve multiple functions: transmitting high-priority data and simultaneously carrying multiplexed low-priority UCI. This multi-functionality resolves the contradiction by allowing the same resource to fulfill both high-priority reliability requirements and overall system efficiency goals through integrated transmission.
2Productivity
If low-priority UCI is multiplexed onto high-priority PUSCH, then system efficiency is improved, but transmission reliability of high-priority UCI may deteriorate due to resource sharing
Solution Approach 1:
The patent applies local quality by differentiating resource allocation based on priority levels. High-priority UCI is allocated dedicated resources or prioritized scheduling within the PUSCH, while low-priority UCI shares remaining resources. This ensures that high-priority transmission reliability is maintained through localized resource protection while overall system efficiency improves through multiplexing.
Solution Approach 2:
The system implements partial multiplexing where only a portion of the PUSCH resources are allocated to low-priority UCI, with the majority reserved for high-priority data and critical high-priority UCI. This partial action approach ensures that high-priority reliability is not compromised while still achieving efficiency improvements from multiplexing low-priority traffic.
3Adaptability or versatility
If multiple time-frequency resource blocks are reserved for different bit blocks, then resource allocation flexibility is improved, but device complexity increases
Solution Approach 1:
The patent segments the time-frequency resource blocks into distinct allocations for different bit blocks (first time-frequency resource block for first bit block, second time-frequency resource block for second bit block). This segmentation provides resource allocation flexibility by allowing independent scheduling of different UCI types while managing complexity through structured, rule-based allocation criteria that determine which resource block to use based on serving cell ID and resource availability.
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.