Uplink Signal Transmission Using Antenna Panel Codebook Selection
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Solution Overview
Problem
In 5G systems, terminal devices often have a limited number of RF channels, making it challenging to utilize all available antenna panels simultaneously for uplink signal transmission due to the large number of antennas required.
Innovation Solution
The method involves determining a target codebook based on the number of antenna panels, allowing flexible selection of antenna panels for uplink signal transmission by using a codeword in the codebook, or receiving antenna panel indication information from a network device to select the appropriate panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If all antenna panels are used to transmit uplink signals simultaneously, then the total number of antennas increases, but the terminal device does not have enough RF channels to support all antenna panels
Solution Approach 1:
The patent segments the antenna panels into multiple groups, where each group can be independently selected for transmission. The codebook is divided into multiple codebook groups, each corresponding to a specific antenna panel group. This segmentation allows the system to use a manageable number of RF channels while still supporting a large total number of antennas by activating only the necessary segments.
Solution Approach 2:
The patent implements dynamic selection of antenna panel groups through codebook group indication information. The terminal device can dynamically choose which codebook group to use based on channel conditions, and the network device can indicate the selected codebook group through downlink control information. This dynamic approach allows flexible adaptation between using more antennas when needed and using fewer antennas when RF channels are limited.
2Adaptability or versatility
If a fixed codebook is used for all antenna panels, then the system is simple to implement, but it cannot flexibly adapt to different numbers of antenna panels
Solution Approach 1:
The patent creates a universal codebook structure that can serve multiple functions and adapt to different scenarios. The codebook is designed to support different numbers of antenna panels (1, 2, or 4 panels) through a unified framework with multiple codebook groups. Each codebook group contains precoding matrices that can be applied to different antenna panel configurations, making the system universally applicable while maintaining flexibility.
Solution Approach 2:
The patent changes the parameter of codebook configuration based on the number of antenna panels. The codebook is divided into multiple codebook groups, where each group corresponds to a specific antenna panel configuration. The network device indicates which codebook group to use through downlink control information, allowing the system to adapt to different antenna panel numbers by selecting the appropriate codebook group rather than using a single fixed codebook.
Data Source
AI summary
An uplink signal transmission method includes: determining, by a terminal device, a target codebook according to a number of antenna panels of the terminal device; and transmitting, by the terminal device, uplink signal by using a codeword in the target codebook.