CSI-RS Reporting Trigger Mechanism for Mixed NP and BF Types
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Solution Overview
Problem
In existing LTE systems, there is no CSI reporting trigger mechanism when both non-precoded CSI-RS (NP CSI-RS) and beamformed CSI-RS (BF CSI-RS) exist in the same process, leading to inefficient channel state information reporting.
Innovation Solution
A method and apparatus for controlling channel state information reporting by sending control information from a first network device to a second network device, which includes a trigger signal and channel state information type, allowing the second network device to report target channel state information based on the indicated type, thereby enabling reporting of NP CSI-RS and BF CSI-RS separately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If only one CSI-RS type is configured in a CSI process, then the reporting mechanism is simple and clear, but the system cannot support both NP CSI-RS and BF CSI-RS reporting simultaneously
Solution Approach 1:
The patent segments the CSI reporting mechanism by introducing separate trigger signals for different CSI-RS types. Specifically, it configures first trigger signals for NP CSI-RS reporting and second trigger signals for BF CSI-RS reporting, allowing independent control and reporting of each type without mixing them in a single unified process.
Solution Approach 2:
The patent introduces an intermediary mechanism through separate trigger signal configurations that mediate between the network device and terminal device for different CSI-RS types. The trigger signals act as intermediaries to initiate specific reporting processes, enabling the system to handle multiple CSI-RS types through a structured intermediate control layer.
2Productivity
If NP CSI-RS and BF CSI-RS are configured in the same process without separate trigger mechanisms, then the configuration is simple, but CSI reporting cannot be triggered efficiently for different types
Solution Approach 1:
The patent implements dynamic triggering by configuring different trigger signals that can be activated independently based on reporting needs. The network device can dynamically select whether to trigger NP CSI-RS reporting, BF CSI-RS reporting, or both, by activating the corresponding first or second trigger signals as conditions require.
Solution Approach 2:
The patent changes the triggering parameter structure by introducing distinct trigger signal types with different configurations. Instead of using a single trigger mechanism, it employs multiple trigger parameters (first trigger signals and second trigger signals) that can be independently configured and activated to control different CSI reporting behaviors.
3Measurement precision
If a unified CSI reporting mechanism is used for both NP CSI-RS and BF CSI-RS, then the mechanism is simple to implement, but measurement precision and reporting accuracy deteriorate
Solution Approach 1:
The patent segments the CSI measurement and reporting process into distinct paths for NP CSI-RS and BF CSI-RS. By configuring separate trigger signals and independent reporting mechanisms for each type, it ensures that measurements for each CSI-RS type are processed independently, maintaining measurement precision without mixing different CSI types in the same reporting flow.
Data Source
AI summary
The present disclosure describes information reporting methods and related apparatuses used to control channel state information reporting between network devices. One example method includes receiving, by a second network device, control information sent by a first network device. The control information can include a trigger signal and a channel state information type, and the trigger signal can be used to trigger the second network device to report target channel state information to the first network device. The second network device determines the target channel state information based on the channel state information type, and then reports the target channel state information to the first network device based on the trigger signal and the channel state information type.