Multi-Link CSI Feedback for Coordinated Wireless Link Control
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively managing and optimizing communication via multiple independent links, particularly in coordinating channel state information, power control, and beamforming across different links, which affects the overall performance and reliability of wireless networks.
Innovation Solution
The proposed solution involves a method and apparatus for obtaining and processing channel state information from multiple wireless communication links to generate feedback signals, enabling dynamic control of uplink and downlink allocations, power control, and beam management across multiple independent links, allowing for improved resource sharing and communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple independent links are used for wireless communication, then communication reliability and throughput are improved, but coordination of channel state information and feedback signaling becomes more complex
Solution Approach 1:
The patent combines channel state information from multiple independent links into a single unified feedback report. Instead of transmitting separate feedback signals for each link, the system merges the CSI measurements and transmits them together through a single feedback mechanism, reducing signaling overhead and complexity while maintaining the reliability benefits of multi-link communication
Solution Approach 2:
The feedback signaling mechanism is designed to handle multiple links universally through a single report structure. The unified feedback system can accommodate CSI from any number of independent links using a standardized format, making the system scalable and reducing the complexity that would otherwise increase linearly with the number of links
2Productivity
If separate feedback signals are generated for each link, then link-specific optimization is improved, but overall feedback overhead and processing complexity increase
Solution Approach 1:
The patent merges separate feedback signals into a single unified feedback report that contains channel state information for multiple links. This consolidation reduces the total feedback overhead and energy consumption while still preserving link-specific optimization capabilities through the structured organization of multi-link CSI within the unified report
Data Source
AI summary
Various aspects of the disclosure relate to feedback for independent links. For example, channel state feedback may be based on the channel state of multiple links. In some aspects, the independent links may involve a first device (e.g., a user equipment) communicating via different independent links with different devices (e.g., transmit receive points (TRPs) or sets of TRPs). In some scenarios, channel state information (CSI) feedback may take into account the CSI-reference signals (CSI-RSs) from multiple links. For example, CSI feedback may be based on CSI-RSs from multiple links if the antenna sub-arrays for the links are close to one another. As another example, a decision as to whether CSI feedback is to be based on CSI-RSs from multiple links may depend on channel conditions.