UCI Multiplexing on Overlapping PUCCH Resources with Mixed Priorities
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Solution Overview
Problem
In 5G NR systems, there is no specific method to handle the multiplexing transmission of uplink control information (UCI) on physical uplink control channels (PUCCHs) with different physical layer priorities that overlap in the time domain, leading to conflicts and potential dropping of low-priority channels.
Innovation Solution
A method that determines a target time unit and selects PUCCH resources for UCI transmission, applying predetermined multiplexing rules to multiplex UCI on overlapping PUCCH resources with different priorities, ensuring continuous transmission without grouping based on physical layer priority.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channels with high physical layer priority are transmitted and channels with low physical layer priority are dropped, then high priority UCI transmission is ensured, but low priority UCI is lost
Solution Approach 1:
The patent merges multiple UCIs from different priority channels into a single target PUCCH resource. When PUCCH resources with different priorities overlap in time domain, the method combines the UCIs (HARQ-ACK, CSI, SR) from both high and low priority channels into one resource, ensuring that low priority UCI is not dropped but rather integrated with high priority UCI for joint transmission.
2Loss of information
If multiple PUCCH resources with different priorities are transmitted simultaneously, then all UCI can be transmitted, but resource conflict occurs in time domain
Solution Approach 1:
Instead of allowing simultaneous transmission of multiple PUCCH resources (which causes conflict), the patent inverts the approach by selecting a single target PUCCH resource from the overlapping set. The method establishes selection criteria based on priority levels and resource characteristics to determine which single resource will carry all multiplexed UCIs, thereby eliminating the conflict while maintaining complete UCI transmission.
3Ease of operation
If PUCCH resources are selected without specific multiplexing rules, then resource selection is simple, but UCI transmission reliability is reduced
Solution Approach 1:
The patent establishes preliminary multiplexing rules and selection criteria before actual resource allocation. The method pre-defines how to handle different priority combinations, what target resources to select based on resource characteristics, and how to multiplex different types of UCI. This preliminary framework enables reliable UCI transmission while keeping the actual resource selection process straightforward and rule-based.
Data Source
AI summary
The embodiments of the present disclosure provide a multiplexing transmission method and apparatus, and a storage medium. The method comprises: if uplink control information (UCI) multiplexing transmission on physical uplink control channels (PUCCHs) with different physical layer priorities is configured or supported, and the PUCCHs are overlapped with each other in terms of time domain, determining a target time unit, and determining, as a PUCCH resource set, PUCCH resources for transmitting the UCI in the target time unit; and determining, on the basis of the PUCCH resource set, a PUCCH resource for finally transmitting the UCI in the target time unit. By means of the embodiments of the present disclosure, performing UCI multiplexing transmission without distinguishing channel priorities is realized.