Terminal Lowest-ID PUCCH Selection for QCL and Pathloss References
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Solution Overview
Problem
In future radio communication systems like NR, determining appropriate reference signals for quasi-co-location (QCL) and pathloss calculation is unclear, leading to potential reductions in system performance such as throughput.
Innovation Solution
A terminal with a receiving section that processes configuration information without spatial relation information and controls reception of physical channels using downlink control information (DCI) format 0_0 to determine reference signals for QCL and pathloss calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If configuration information without spatial relation information is provided for PUCCH resource, then device complexity is reduced and ease of operation is improved, but reference signal determination becomes unclear leading to throughput reduction
Solution Approach 1:
The terminal autonomously determines the reference signal for PUSCH by selecting the PUCCH resource with the lowest ID from the configured resources, without requiring additional spatial relation information from the network. This self-service mechanism resolves the ambiguity in reference signal determination while maintaining configuration simplicity.
Solution Approach 2:
The PUCCH resource with the lowest ID serves as an intermediary element that links the configuration information to the reference signal determination. By using this specific PUCCH resource as a mediator, the system establishes a clear reference signal selection process without adding complex spatial relation configurations.
2Productivity
If spatial relation information is included in configuration information, then reference signal determination becomes clear improving throughput, but device complexity and configuration overhead increase
Solution Approach 1:
The invention extracts the essential function of reference signal determination from the spatial relation information configuration. Instead of requiring complete spatial relation information, the system extracts only the necessary element (PUCCH resource with lowest ID) to determine the reference signal, thereby reducing configuration complexity while maintaining throughput performance.
Solution Approach 2:
The network pre-configures multiple PUCCH resources without spatial relation information, and the terminal performs preliminary selection of the PUCCH resource with the lowest ID. This preliminary action establishes the reference signal determination before PUSCH transmission, avoiding the need for complex spatial relation configurations during operation.
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes: a receiving section that receives configuration information not including spatial relation information and indicating a physical uplink control channel (PUCCH) resource having a lowest ID; and a control section that controls reception of a physical uplink shared channel (PUSCH) scheduled using downlink control information (DCI) format 0_0.