Dynamic CSI Measurement Pilot Configuration for Flexible Feedback
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Solution Overview
Problem
The existing Long Term Evolution (LTE) system's CSI measurement process lacks flexibility as user equipment (UE) repeatedly measures and feeds back channel state information using a fixedly configured measurement pilot, limiting adaptability and efficiency.
Innovation Solution
A method where a first network device sends a signal to a second network device to determine and send a measurement pilot, allowing the second network device to measure and feedback channel state information, including port selection information, which indicates the selected port number, enabling dynamic configuration of measurement pilots and improved flexibility in CSI measurement and feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a fixedly configured measurement pilot is used for CSI measurement, then the measurement process is simple and stable, but the flexibility and adaptability of the system deteriorates
Solution Approach 1:
The patent applies dynamics by enabling the measurement pilot configuration to change over time. The network device dynamically adjusts measurement pilot parameters (such as port quantity, pilot pattern, frequency location) based on current channel conditions and system requirements, transforming the static fixed configuration into a dynamic adaptable system that maintains stability through controlled changes
2Quantity of substance
If the base station sends a fixedly configured measurement pilot, then the signaling overhead is reduced, but the ability to adapt to changing channel conditions deteriorates
Solution Approach 1:
The patent implements parameter changes by allowing the network device to modify measurement pilot parameters (port quantity, frequency location, pilot pattern) based on channel conditions. This enables the system to adapt to varying channel characteristics while maintaining reasonable signaling overhead through targeted parameter adjustments rather than complete reconfiguration
3Ease of operation
If the UE repeatedly measures and feeds back CSI using a fixed measurement pilot, then the feedback process is straightforward, but the measurement precision and accuracy deteriorate in changing environments
Solution Approach 1:
The patent applies periodic action by having the network device periodically update measurement pilot configurations based on changing channel conditions. This creates a rhythm of measurement and update cycles where the measurement pilot is refreshed at appropriate intervals, maintaining measurement accuracy without requiring continuous reconfiguration, thus balancing simplicity with precision
Data Source
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AI summary
Embodiments of the present invention relate to the field of communications technologies, and disclose a CSI measurement and feedback method and a device, so as to resolve a prior-art problem that flexibility is poor when the UE measures a measurement pilot and provides a feedback. In a specific solution, a first network device sends a first signal to a second network device. The first signal is used for the second network device to determine a first measurement pilot according to the first signal, and send the first measurement pilot to the first network device. The first network device receives the first measurement pilot sent by the second network device, and measures the first measurement pilot to obtain first CSI. The first CSI includes at least one of a CQI, a PMI, an RI, or port selection information, and the port selection information is used to indicate a port number of a port selected by the first network device from ports in the first measurement pilot. The first network device sends the first CSI to the second network device.