Sub-Band Uplink Precoding for Eight-Layer Transport
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing 5G NR system is limited to uplink transport of 4 layers, while downlink transport supports 8 layers, necessitating a solution to achieve frequency selective precoding to enhance uplink transport rates.
Innovation Solution
A method for determining and applying precoding codewords to each sub-band of the uplink channel based on indication information received from the network device, enabling frequency selective precoding and supporting up to 8 layers of uplink transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed codebook is used for uplink channel precoding, then the system is simple to implement, but the uplink transport rate is limited to 4 layers
Solution Approach 1:
The patent divides the frequency band into multiple sub-bands and applies different precoding codewords to each sub-band based on channel conditions. This segmentation allows the system to achieve frequency-selective precoding, improving uplink transport rate while managing complexity through structured division of the communication channel.
Solution Approach 2:
The patent introduces dynamic precoding where the network device sends indication information to the terminal device, allowing the precoding codeword to be selected and changed based on real-time channel conditions. This dynamic adaptation enables the system to achieve higher transport rates (up to 8 layers) while maintaining manageable complexity through automated decision-making.
2Productivity
If frequency selective precoding is implemented, then uplink transport efficiency is enhanced, but the system complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the terminal device receives indication information from the network device about which precoding codeword to use for each sub-band. This feedback-based approach enables frequency-selective precoding to improve transport efficiency while reducing configuration complexity through automated network-controlled precoding selection.
3Adaptability or versatility
If a fixed codebook is used, then the system is easy to implement, but it cannot adapt to frequency selective channels
Solution Approach 1:
The patent applies different precoding strategies to different sub-bands based on their specific channel conditions. Each sub-band receives customized precoding codewords selected according to local channel characteristics, enabling the system to adapt to frequency-selective channels while managing complexity through localized optimization rather than global reconfiguration.
Data Source
AI summary
A transmitting method for an uplink channel, executed by a terminal device, includes: receiving indication information related to precoding transmitted by a network device, determining a precoding codeword corresponding to each sub-band of the uplink channel according to the indication information, precoding each corresponding sub-band of the uplink channel with the precoding codeword corresponding to each sub-band, and transmitting the uplink channel, of which each sub-band has been precoded, to the network device.