Uplink Control Information Multiplexing Resource Allocation
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Solution Overview
Problem
In next-generation radio communication systems, the existing methods for mapping channel state information (CSI) on a Physical Uplink Shared Channel (PUSCH) do not adequately control transmission processing, leading to potential degradation in communication throughput and quality when uplink control information is multiplexed with uplink data.
Innovation Solution
A user terminal is designed to transmit retransmission control information (HARQ-ACK) and channel state information, with at least one CSI part allocated to different resources, using rate-matching or puncturing processing to optimize resource allocation and minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink control information (UCI) is multiplexed on uplink shared channel (PUSCH), then transmission efficiency is improved, but communication throughput and quality may be degraded
Solution Approach 1:
The channel state information (CSI) is divided into multiple parts (CSI part 1, CSI part 2, etc.), where different parts are allocated to different resources. This segmentation allows critical CSI parts to be transmitted on protected resources while less critical parts share resources with UCI, resolving the contradiction between transmission efficiency and communication quality
Solution Approach 2:
Different resource allocation strategies are applied to different CSI parts based on their importance. Critical CSI parts receive protected resource allocation to ensure communication quality, while less critical parts allow multiplexing with UCI to improve transmission efficiency. This local differentiation resolves the contradiction by applying appropriate quality levels to different parts
2Adaptability or versatility
If mapping is performed on each CSI type separately, then resource allocation flexibility is improved, but transmission processing control becomes insufficient
Solution Approach 1:
The patent introduces new parameters for resource allocation including CSI part identifiers, resource offset values, and priority levels. By changing and expanding the parameter set, the system achieves both flexible resource allocation for different CSI types and comprehensive transmission processing control, resolving the contradiction between flexibility and control
3Productivity
If HARQ-ACK and CSI are allocated to the same resources, then resource utilization is improved, but interference between signals increases
Solution Approach 1:
Resources are segmented into protected resources for critical CSI parts and shared resources for less critical CSI parts. This segmentation allows HARQ-ACK and CSI to share resources in controlled manner, improving resource utilization while minimizing interference through spatial and resource domain separation
Solution Approach 2:
The patent introduces resource allocation control mechanisms that act as intermediaries between HARQ-ACK and CSI signaling. These mechanisms coordinate resource assignment, apply appropriate power control, and manage interference through structured resource partitioning, enabling both high resource utilization and low interference
Data Source
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Figure 3A~3B
AI summary
A decrease in communication throughput and so on is suppressed even in a case where uplink control information is multiplexed on an uplink data channel. A user terminal includes a transmitting section that transmits, on an uplink shared channel, retransmission control information (HARQ-ACK) and channel state information including a plurality of channel state information parts (CSI parts), and a control section that performs control to allocate at least the HARQ-ACK and a specific CSI part to different resources.