Wireless Node CSI Reporting with Dynamic Power Offset Selection
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Solution Overview
Problem
Existing wireless communication systems face challenges in network energy saving and resource utilization due to half-duplex modes in TDD spectra, leading to increased interference and latency, and the determination of the assumed ratio of PDSCH EPRE to CSI-RS EPRE in CSI reporting is a key issue.
Innovation Solution
A method for wireless communication that adjusts the assumed ratio of PDSCH EPRE to CSI-RS EPRE by using power control offsets, allowing flexible duplex modes and improving CSI reporting flexibility, efficiency, and capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If half-duplex mode is used in TDD spectrum, then self-interference is avoided and cross-link interference is mitigated, but resource utilization decreases and latency increases
Solution Approach 1:
The patent applies dynamic duplex mode selection by configuring different power control offset states for uplink and downlink transmissions. The base station can dynamically switch between half-duplex and full-duplex modes based on channel conditions and interference levels, allowing the system to achieve both interference mitigation and high resource utilization by adapting the duplex mode in real-time
2Productivity
If flexible duplex mode is implemented, then resource utilization and latency are improved, but determination of PDSCH EPRE to CSI-RS EPRE ratio becomes more complex
Solution Approach 1:
The patent introduces multiple power control offset states (first power control offset and second power control offset) that correspond to different transmission scenarios. By changing the power control offset parameter based on the duplex mode and channel conditions, the system simplifies the determination process while maintaining flexible resource allocation and achieving both high resource utilization and manageable complexity
Solution Approach 2:
The base station pre-configures multiple power control offset states and their corresponding conditions before actual transmission. This preliminary configuration allows the UE to quickly determine the appropriate PDSCH EPRE to CSI-RS EPRE ratio without complex real-time calculations, reducing latency and simplifying the determination process while supporting flexible duplex modes
3Adaptability or versatility
If multiple power control offset states are configured, then CSI reporting flexibility is improved, but system complexity increases
Solution Approach 1:
The patent configures multiple power control offset states with different parameter values to adapt to various transmission scenarios and channel conditions. Each state corresponds to specific CSI reporting configurations, allowing the system to achieve high adaptability and flexibility in CSI reporting while managing complexity through structured parameter organization and clear state-transition rules
Data Source
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AI summary
The present application discloses a method and device for a node used for wireless communication. A first node receives a first CSI reporting configuration, the first CSI reporting configuration indicating a first RS resource set, and sends first CSI reporting. A first opportunity set comprises at least one transmission opportunity, which is not later than that of a CSI reference resource of the first CSI reporting, of at least one RS resource in the first RS resource set, and the first opportunity set is used for obtaining channel measurement used for calculating the first CSI reporting; the first CSI reporting comprises information indicating a first CSI-RS resource; a target power control offset is a ratio of a PDSCH EPRE used in the calculation of the first CSI reporting to the EPRE of the first CSI-RS resource, candidates of the target power control offset comprises a first power control offset and a second power control offset, and both the first power control offset and the second power control offset are indicated to the first CSI-RS resource. The method can select appropriate CSI-RS EPREs, and flexibly adjust CSI reporting.