CQI Table Configuration for Reliable Low-Rate MTC And 5G Feedback
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Solution Overview
Problem
Current mobile communication systems, particularly in LTE and emerging 5G technologies, face challenges in providing higher data transmission reliability and lower data transmission rates for Machine Type Communications (MTC) terminals and New Radio Access Technology (NR) terminals, which are not adequately addressed by existing standards.
Innovation Solution
A method and apparatus for receiving and transmitting Channel Quality Indication (CQI) information using higher layer configuration signaling messages to determine CQI tables that include specific modulation schemes and code rates, tailored for different coverage levels, scenarios, and channel coding types, allowing for adaptive CQI feedback mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high order modulation and low redundancy error correction coding with high transmission rate are adopted, then system throughput is significantly increased, but communication reliability deteriorates in deep-fading channels
Solution Approach 1:
The patent implements dynamic adaptation of modulation and coding schemes based on real-time channel conditions. The base station receives CQI feedback from terminals and adjusts the modulation order and coding rate dynamically, transitioning from static to dynamic parameter selection to optimize both throughput and reliability according to varying channel quality.
Solution Approach 2:
The patent changes key transmission parameters (modulation order, coding rate, transmit power) based on channel state information. By adjusting these parameters dynamically according to CQI feedback, the system achieves optimal balance between throughput and reliability for different channel conditions, resolving the contradiction between high-rate transmission and reliable communication.
2Reliability
If low order modulation and high redundancy error correction coding with low transmission rate are adopted, then communication reliability is guaranteed, but system throughput is constrained and resources are wasted
Solution Approach 1:
The system transitions from static low-rate transmission to dynamic rate adaptation. Based on CQI feedback indicating channel quality, the base station dynamically increases modulation order and coding rate when channel conditions improve, thereby releasing resource constraints and increasing throughput while maintaining reliability through adaptive adjustments.
Solution Approach 2:
The patent adjusts transmission parameters (modulation order, coding rate, spectral efficiency) based on channel conditions. When channels are favorable, parameters are increased to maximize throughput; when channels deteriorate, parameters are reduced to maintain reliability, thus eliminating resource waste while preserving communication reliability.
3Reliability
If transmit power is increased to combat time-varying characteristics of wireless fading channels, then communication quality in deep-fading channels is guaranteed, but system throughput increase is limited
Solution Approach 1:
The patent implements joint optimization of transmit power and spectral efficiency parameters. Instead of relying solely on power increases, the system dynamically adjusts modulation order and coding rate based on CQI feedback, achieving both communication quality and throughput improvement through coordinated parameter changes rather than single-parameter adjustment.
Data Source
AI summary
The present disclosure provides a method and an apparatus for receiving Channel Quality Indication (CQI) information, as well as a method and an apparatus for transmitting CQI information. The method for receiving CQI information includes: transmitting a higher layer configuration signaling message to a terminal; and receiving CQI information from the terminal. The CQI information is determined based on a CQI table obtained based on the higher layer configuration signaling message. With the above solutions, higher data transmission reliability and lower data transmission rate required for MTC terminals with coverage enhancement and 5G terminals can be achieved.