CSI Reporting with Multiple Measurement Assumptions
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Solution Overview
Problem
Existing CSI reporting methods in wireless communication systems, particularly in 5G networks, result in inefficient energy consumption due to excessive CSI reporting overheads and inaccurate antenna port adaptation, as UEs often report a single CSI without network-side indication, leading to misinterpretation and increased power consumption.
Innovation Solution
A CSI sending method that enables UE to report multiple CSI instances with distinct measurement assumptions, employing a compression rule and identification mechanism to ensure accurate interpretation by the network side, reducing overheads and enhancing energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the UE reports a single piece of CSI without network-side indication, then the reporting overhead is reduced, but the CSI reporting accuracy and antenna port adaptation precision deteriorate
Solution Approach 1:
The patent segments the single CSI report into multiple CSI instances, where each instance corresponds to a specific antenna port assumption. This segmentation allows the network to receive multiple targeted CSI reports instead of a single generic report, improving accuracy while managing overhead through selective reporting based on network-side indications.
Solution Approach 2:
The patent introduces dynamic control where the network can indicate to the UE whether to report one or two CSI instances. This dynamic adjustment allows the system to adapt the reporting overhead based on current network conditions and requirements, resolving the contradiction between overhead reduction and accuracy improvement.
2Measurement precision
If the UE reports multiple pieces of CSI for different measurement assumptions, then the CSI reporting accuracy is improved, but the reporting overhead increases
Solution Approach 1:
The network dynamically controls the number of CSI instances reported by the UE through explicit indications. When high accuracy is needed, the network requests two CSI instances; when overhead reduction is prioritized, the network requests only one instance. This dynamic control resolves the contradiction between accuracy improvement and overhead increase.
Solution Approach 2:
The patent changes the parameter of CSI reporting quantity from fixed to variable, controlled by network-side indications. The UE adjusts its reporting behavior based on the number of CSI instances indicated by the network, allowing flexible adjustment of reporting overhead while maintaining the capability for high-accuracy reporting when needed.
3Measurement precision
If the network configures the UE to report two pieces of CSI, then the antenna port adaptation precision is improved, but the energy consumption increases
Solution Approach 1:
The system dynamically adjusts the CSI reporting quantity based on network conditions and requirements. The network only requests two CSI instances when high-precision antenna port adaptation is actually needed, rather than continuously requiring dual CSI reporting. This reduces unnecessary energy consumption while maintaining adaptation precision when required.
Solution Approach 2:
The reporting quantity parameter is changed from a static configuration to a dynamically adjustable parameter controlled by network-side indications. The UE adjusts its energy consumption for CSI reporting based on the indicated number of instances, allowing the system to optimize energy usage while maintaining the capability for high-precision adaptation when needed.
Data Source
AI summary
A channel state information (CSI) sending method, which includes sending, by user equipment (UE), a plurality of pieces of first CSI to a network side device according to a first form, where the plurality of pieces of first CSI are CSI for different measurement assumptions. The first form includes feeding back one CSI report, where the CSI report includes the plurality of pieces of first CSI.