Uplink Control Information Transmission Mode Selection
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting uplink control information, particularly in scenarios where simultaneous physical uplink shared channel (PUSCH) and physical uplink control channel (PUCCH) transmissions are configured, as existing methods do not effectively manage the transmission of channel status information and hybrid automatic repeat request acknowledgments.
Innovation Solution
A method and system that configure terminals and base stations to receive information on simultaneous PUSCH and PUCCH transmission, allowing for the transmission of uplink control information on either PUSCH or PUCCH based on the presence of channel status information or hybrid automatic repeat request acknowledgments, ensuring optimal data and control information multiplexing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If simultaneous PUSCH and PUCCH transmission is configured, then uplink control information can be transmitted more reliably, but device complexity increases due to multiple channel management
Solution Approach 1:
The patent implements dynamic channel selection where the terminal adaptively switches between PUSCH and PUCCH for UCI transmission based on real-time conditions. When PUSCH is scheduled in the uplink subframe, UCI is transmitted on PUSCH; otherwise, it uses PUCCH. This dynamic adaptation resolves the contradiction by optimizing reliability through flexible channel usage while managing complexity through clear selection criteria.
Solution Approach 2:
The patent segments the UCI transmission process into distinct scenarios: one for when PUSCH is scheduled and another for when it is not. This segmentation allows the system to handle each case with appropriate transmission rules, improving reliability through scenario-specific optimization while reducing the overall complexity by breaking down the decision-making process into manageable segments.
2Productivity
If UCI is transmitted on PUSCH, then data throughput is maintained, but channel status information accuracy may be compromised due to multiplexing
Solution Approach 1:
The patent employs dynamic channel allocation that responds to scheduling conditions. When PUSCH is scheduled, UCI (including CSI) is transmitted on PUSCH to maintain data throughput. The system dynamically adjusts the transmission channel based on whether PUSCH resources are available, thereby maintaining productivity while managing the trade-off in measurement precision through appropriate channel selection.
Solution Approach 2:
The patent merges data transmission on PUSCH with control information transmission by allowing UCI to be multiplexed on PUSCH when scheduled. This combining approach maintains data throughput by utilizing existing PUSCH resources for both data and control information, while the system manages the precision trade-off through standardized multiplexing procedures defined in the patent.
3Adaptability or versatility
If simultaneous PUSCH and PUCCH transmission is configured, then transmission flexibility is improved, but peak-to-average power ratio increases
Solution Approach 1:
The patent implements dynamic channel selection that adapts to scheduling conditions to improve transmission flexibility. When PUSCH is scheduled, UCI transmission occurs on PUSCH; otherwise, it uses PUCCH. This dynamic approach enhances adaptability by providing multiple transmission paths while managing power consumption through conditional channel selection rather than simultaneous transmission.
Solution Approach 2:
Instead of configuring simultaneous PUSCH and PUCCH transmission which would increase flexibility but raise PAPR, the patent inverts the approach by using exclusive selection based on scheduling conditions. This inversion resolves the contradiction by achieving flexibility through conditional channel switching rather than simultaneous transmission, thereby controlling the peak-to-average power ratio.
4Measurement precision
If UCI is transmitted on PUCCH, then channel status information is protected from multiplexing interference, but data throughput decreases due to dedicated control channel resources
Solution Approach 1:
The patent uses dynamic channel selection that switches between PUCCH and PUSCH based on scheduling conditions. When PUSCH is scheduled, UCI is transmitted on PUSCH to maintain data throughput; when not scheduled, UCI uses PUCCH to ensure accuracy. This dynamic adaptation resolves the contradiction by optimizing for throughput when possible and for accuracy when necessary.
Solution Approach 2:
The patent segments UCI transmission into two distinct paths: PUCCH for when PUSCH is not scheduled (prioritizing accuracy) and PUSCH for when it is scheduled (prioritizing throughput). This segmentation allows the system to achieve both high accuracy and high throughput by selecting the appropriate path based on real-time scheduling conditions, rather than being constrained to a single fixed approach.
Data Source
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AI summary
A method for Uplink Control Information (UCI) transmission of User Equipment (UE) in a communication system is disclosed. The method comprises receiving information indicating whether simultaneous Physical Uplink Shared Channel (PUSCH) and Physical Uplink Control Channel (PUCCH) transmission is configured or not. The method further comprises identifying whether at least one PUSCH transmission is configured at a corresponding subframe for UCI transmission or not. The method further comprises transmitting, when at least one PUSCH transmission configured at the corresponding subframe for UCI transmission, the UCI on a PUSCH at the corresponding subframe. The method further comprises transmitting, when the UE is configured with more than one serving cell and is not configured for simultaneous PUSCH and PUCCH transmission, the UCI on PUSCH of a serving cell at the corresponding subframe if the UCI consists of aperiodic Channel Status Information (CSI) or aperiodic CSI and Hybrid Automatic Repeat Request (HARQ) with-Acknowledgement (ACK).