PUCCH Resource Selection for UCI and Multi-CSI Multiplexing in FD Slots
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Solution Overview
Problem
In wireless communication systems, particularly in full duplex (FD) operations, the physical uplink control channel (PUCCH) resources overlap with guard bands or downlink resources, limiting the ability to multiplex uplink control information (UCI) and multiple channel state information (CSI) instances, impacting transmission timing and reliability.
Innovation Solution
The method involves selecting a PUCCH resource in a full duplex slot based on payload size for UCI transmission, configuring multiple CSI PUCCH resources, and adapting resource configurations to prioritize UCI/CSI multiplexing, ensuring non-overlapping resources and optimal coding rates for reliable transmission in both half duplex (HD) and FD slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PUCCH resources are allocated in full duplex slots, then uplink control information can be transmitted in FD slots, but the PUCCH resources overlap with guard bands or downlink resources limiting multiplexing capability
Solution Approach 1:
The patent segments the PUCCH resource allocation by identifying and excluding overlapping resources (those overlapping with guard bands or downlink resources) from the set of available PUCCH resources in FD slots. This segmentation allows the system to maintain UCI transmission capability while avoiding resources that would cause interference or conflicts, thereby resolving the contradiction between transmission capability and multiplexing versatility.
2Adaptability or versatility
If multiple CSI instances are multiplexed on PUCCH, then transmission options increase, but resource conflicts with guard bands and downlink resources occur
Solution Approach 1:
The patent extracts or removes PUCCH resources that overlap with guard bands or downlink resources from the set of available resources for CSI multiplexing. By taking out these conflicting resources, the system can maintain multiple transmission options for CSI reporting while ensuring that only non-overlapping, reliable resources are used, thus preserving transmission reliability.
3Productivity
If PUCCH resources are selected based on payload size, then resource allocation optimizes transmission efficiency, but available non-overlapping resources are reduced
Solution Approach 1:
The patent applies local quality by differentiating between PUCCH resources based on their availability in FD slots. It identifies which resources are locally suitable (non-overlapping with guard bands or downlink resources) and uses this local quality information to guide the selection process. This allows the system to optimize transmission efficiency by selecting appropriate resources while maintaining awareness of the reduced set of valid options in FD slots.
Data Source
AI summary
Apparatuses and methods for UCI and multi-CSI multiplexing on PUCCH for SBFD are described. An apparatus is configured to select a PUCCH resource in a FD slot, based on an uplink UCI payload size, for transmission of CSI via the FD slot, and to transmit the UCI in the PUCCH resource. Another apparatus is configured to configure multiple CSI PUCCH resources for a UE, indicate that a will be a FD slot, and receive, in the FD slot, UCI including multiplexed CSI reports in a portion of a PUCCH resource from the set of multiple CSI PUCCH resources. Yet another apparatus is configured to receive a code rate configuration that indicates a maximum coding rate for uplink transmission of information via a PUCCH resource in FD slots, and to transmit a PUCCH in the PUCCH resource of a FD slot with a coding rate based on the maximum coding rate.