Channel State Indication on Unlicensed Spectrum Antenna Panels
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Solution Overview
Problem
In 5G NR systems, base stations with multiple antenna panels face challenges in providing accurate channel state indication to terminals on unlicensed spectra, as existing solutions do not effectively manage channel state detection results across multiple antenna panels, impacting reliable communication.
Innovation Solution
The method involves a base station sending channel state indication information through a selected antenna panel, which indicates the detection results of multiple antenna panels across one or more bandwidth units, allowing terminals to detect channel state information and PDCCH signaling in a cyclical manner to optimize communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station uses multiple antenna panels to improve spatial diversity gain, then communication reliability is improved, but channel state indication complexity increases because channel state detection results of multiple antenna panels may not be the same
Solution Approach 1:
The patent segments the channel state indication information by antenna panel, with each panel transmitting its own detection results independently. This allows the base station to manage multiple antenna panels separately, reducing the complexity of handling diverse detection results while maintaining spatial diversity benefits
Solution Approach 2:
The patent introduces a dedicated channel state indication signal as an intermediary mechanism that mediates between the multiple antenna panels and the terminal. This standardized indication signal simplifies the terminal's processing by providing a uniform interface to receive channel state information from any antenna panel
2Measurement precision
If the terminal detects channel state indication information from each antenna panel periodically, then channel state awareness is improved, but terminal power consumption increases
Solution Approach 1:
The patent implements periodic detection cycles for channel state indication information, where the terminal monitors only at scheduled intervals rather than continuously. This periodic action maintains channel state awareness while significantly reducing power consumption compared to continuous monitoring
Solution Approach 2:
The base station actively transmits channel state indication information proactively, allowing the terminal to receive updates without constant polling. This self-service approach enables the terminal to maintain accurate channel state knowledge with minimal active detection, reducing power consumption
Data Source
AI summary
A method and device for channel state indication on an unlicensed spectrum. A base station sends channel state indication information through a first antenna panel. The channel state indication information is configured to indicate channel state detection results of k antenna panels of the base station on at least one BWU of an unlicensed spectrum, where k is positive integer.