Uplink Precoding Signaling via Data Channel for 5G MIMO
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting uplink precoding information due to limited control channel capacity, especially when subband precoding is required, which is necessary for next-generation wireless communication systems with multiple transmit antennas.
Innovation Solution
A method where a terminal determines subband precoding information based on wideband precoding information received from a base station and transmits uplink precoding information on a data channel rather than a control channel, allowing for efficient subband precoding without increasing control channel burden.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If per-subband precoding information is transmitted to the terminal, then uplink transmission efficiency is improved, but control channel capacity is exceeded
Solution Approach 1:
The patent segments precoding information transmission into two parts: wideband precoding information transmitted via control channel, and subband precoding information transmitted via data channel. This segmentation allows the control channel to carry only essential wideband information while the data channel carries detailed subband information, resolving the capacity conflict.
Solution Approach 2:
The patent moves subband precoding information from the control channel dimension to the data channel dimension. By changing the transmission dimension from control channel to data channel for subband information, the system avoids control channel capacity saturation while maintaining improved uplink transmission efficiency.
2Quantity of substance
If wideband precoding is used, then control channel capacity is maintained, but uplink transmission efficiency deteriorates
Solution Approach 1:
The patent divides precoding information into wideband and subband components, transmitting wideband information through control channel to maintain capacity, while transmitting subband information through data channel to improve transmission efficiency. This segmentation resolves the trade-off between capacity maintenance and efficiency improvement.
Solution Approach 2:
The patent combines wideband and subband precoding information transmission, where the terminal determines subband precoding information based on the received wideband precoding information. This combination allows the system to maintain control channel capacity while achieving improved uplink transmission efficiency through subband processing.
3Quantity of substance
If the terminal determines subband precoding information autonomously, then control channel burden is reduced, but precoding accuracy may deteriorate
Solution Approach 1:
The base station performs preliminary action by transmitting wideband precoding information that serves as a foundation for terminal's autonomous subband determination. This preliminary wideband information provides accurate baseline precoding parameters, ensuring that subsequent autonomous subband determination maintains high precision while reducing control channel burden.
Solution Approach 2:
The terminal performs self-service by autonomously determining subband precoding information based on received wideband information. This self-service mechanism reduces control channel burden while maintaining precision through the terminal's local processing capabilities and the guidance provided by wideband precoding information.
Data Source
AI summary
The present disclosure relates to a communication technique for converging IoT technology with a 5G communication system for supporting a higher data transfer rate beyond a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (e.g., smart homes, smart buildings, smart cities, smart or connected cars, health care, digital education, retail business, and services associated with security and safety) on the basis of 5G communication technology and IoT-related technology. Disclosed are a method and an apparatus for configuring an efficient hierarchical layer 2 architecture and main functions thereof in a next-generation mobile communication system.