Terminal CSI Feedback Configuration for Multiple Transmission Modes
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Solution Overview
Problem
In communication systems supporting multiple transmission modes, terminal devices struggle to determine the appropriate mode for CSI measurement and feedback, leading to inefficiencies and increased signaling overheads.
Innovation Solution
A network device configures terminal devices with specific CSI measurement and feedback instructions based on the required transmission mode, enabling the terminal devices to perform CSI measurement and feedback efficiently in multiple modes, reducing signaling overheads and improving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal device is configured to support multiple transmission modes, then the adaptability of the system is improved, but the device complexity increases
Solution Approach 1:
The patent segments the transmission modes into distinct types (single-point transmission mode and coordinated multipoint transmission/reception mode) with specific configuration parameters for each. The network device configures different CSI measurement and feedback processes for different transmission modes, allowing the terminal device to handle each mode independently through separate configuration sets, thereby managing complexity through structured division.
Solution Approach 2:
The patent creates a universal configuration framework where the terminal device can operate across multiple transmission modes using a standardized configuration structure. The configuration information includes mode-specific parameters that can be applied universally to different transmission scenarios, enabling the terminal device to adapt to various modes without requiring mode-specific hardware or fundamentally different operational procedures.
2Measurement precision
If the terminal device performs CSI measurement and feedback in multiple transmission modes, then the measurement precision is improved, but the loss of time increases
Solution Approach 1:
The network device performs preliminary configuration of CSI measurement and feedback parameters for multiple transmission modes before actual data transmission begins. The terminal device receives and stores configuration information including CSI-RS resource configurations, feedback formats, and measurement parameters for both single-point and coordinated multipoint modes in advance, enabling rapid mode switching without repeated configuration overhead.
Solution Approach 2:
The patent implements dynamic transmission mode selection where the network device can switch between single-point and coordinated multipoint transmission modes based on channel conditions and traffic requirements. The terminal device dynamically adjusts its CSI measurement and feedback behavior according to the active transmission mode, optimizing the balance between measurement precision and time consumption by activating only the necessary measurement processes for the current mode.
3Reliability
If the network device configures detailed CSI measurement and feedback parameters for multiple transmission modes, then the reliability is improved, but the loss of information increases
Solution Approach 1:
The patent extracts and separates mode-specific configuration parameters from the general CSI feedback configuration. The network device sends dedicated configuration information for each transmission mode including specific CSI-RS resource configurations, feedback formats, and measurement parameters. This extraction allows the terminal device to receive only the necessary parameters for the active transmission mode, reducing redundant signaling overhead while maintaining complete configuration information for reliability when needed.
Data Source
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AI summary
Disclosed are a communications method and device. The method includes: sending, by a network device, configuration information to a terminal device; determining, by the terminal device, channel state information CSI measurement behavior and/or CSI feedback related information, where the channel state information CSI measurement behavior and/or the CSI feedback related information are/is related to the configuration information; and performing, by the terminal device, CSI measurement based on the configuration information and the CSI measurement behavior and/or the CSI feedback related information, to obtain at least one piece of CSI, and sending all or some of the at least one piece of CSI to the network device. It can be learned that, in a scenario in which a plurality of transmission modes are supported, according to the foregoing method, the terminal device can measure CSI, and feed back the measured CSI to the network device.