Configurable CQI Value Range for 5G NR Signaling Overhead
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Solution Overview
Problem
Current 5G NR systems lack a specific solution for designing CQI tables that effectively configure channel quality indicator (CQI) feedback for different target block error rates (BLERs), leading to inefficiencies in resource usage and reliability.
Innovation Solution
A method and device for transmitting and receiving configuration information that allows network devices to configure continuous CQI value ranges for terminal devices based on changing channel conditions, reducing overhead and improving feedback reliability by adjusting the length of the CQI value range according to application scenarios and BLERs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a CQI table is configured for different target BLERs, then the CQI feedback reliability is improved, but the signaling overhead increases
Solution Approach 1:
The patent extracts only the necessary CQI value range information from a complete CQI table configuration. Instead of configuring entire CQI tables for different BLERs, the network device indicates specific value ranges (e.g., starting position and length) that the terminal device uses to determine CQI feedback, significantly reducing signaling overhead while maintaining reliability
Solution Approach 2:
The patent enables dynamic configuration of CQI value ranges by allowing the network device to adjust the starting position and length of CQI value ranges based on changing channel conditions and application scenarios, making the system adaptable without requiring complete table reconfigurations
2Device complexity
If a fixed CQI table is used, then the configuration complexity is reduced, but the adaptability to changing channel conditions deteriorates
Solution Approach 1:
The patent transforms the static CQI table into a dynamic configuration system where the network device can adjust the starting position and length of CQI value ranges based on real-time channel conditions, application scenarios, and target BLERs, enabling continuous adaptation without increasing terminal device complexity
Solution Approach 2:
The patent segments the complete CQI table into configurable value ranges, allowing the network device to selectively activate specific portions of the table based on current conditions. This segmentation enables flexible adaptation while keeping the terminal device's processing complexity manageable
3Productivity
If the CQI value range length is increased, then the CQI indicating efficiency is improved, but the number of feedback bits increases causing resource waste
Solution Approach 1:
The patent enables dynamic adjustment of the CQI value range length based on application scenarios and channel conditions. The network device can configure longer ranges when high indicating efficiency is needed and shorter ranges when resource conservation is prioritized, optimizing the balance between efficiency and resource usage
Solution Approach 2:
The patent changes the parameter of CQI value range length from a fixed value to a configurable parameter that can be adjusted by the network device. This allows the system to optimize the length parameter according to specific scenarios, improving indicating efficiency when needed while reducing feedback bits and resource consumption when possible
Data Source
AI summary
There is provided a method and a device for transmitting and receiving configuration information. The method includes: determining, by a network device, configuration information, where the configuration information is configured to indicate, for a terminal device, a first CQI value range under a first target BLER; and transmitting, by the network device, the configuration information to the terminal device. In the embodiments of the present disclosure, the network device indicates the first CQI value range under the first BLER to the terminal device by using the configuration information, which can effectively save the overhead of high-level signaling, compared to by a manner of configuring a CQI table. In addition, since the CQI value range is configurable, not only the reliability of the CQI feedback but also efficiency of the CQI indication is improved.