Uplink Signal Transmission with Subband Precoding Indication
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Solution Overview
Problem
Existing wireless communication systems, such as LTE and NR, lack flexibility in transmission information during PUSCH uplink transmission, as they only support broadband precoding and do not allow for subband precoding, limiting the adaptability of uplink signal transmission.
Innovation Solution
A method and device that determine transmission information for uplink signals based on first resource information, generating corresponding transmission indication information, and indicating it to the terminal for flexible determination of transmission parameters on frequency domain resources, reducing overhead by establishing a correspondence between resource information and transmission information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If broadband precoding is used for uplink signal transmission, then the system maintains simplicity in transmission indication, but the adaptability to different frequency domain resources is insufficient
Solution Approach 1:
The patent segments the frequency domain resources into multiple subbands and introduces subband precoding to allow different transmission parameters for each subband. This segmentation enables the system to adapt to frequency-selective fading characteristics of different subbands, improving adaptability while maintaining manageable complexity through structured resource division
Solution Approach 2:
The patent introduces dynamic transmission indication mechanisms that allow the base station to flexibly indicate different precoding matrices, SRS resources, and transmission stream numbers for different subbands. This dynamic indication adapts to varying channel conditions across frequency resources, resolving the contradiction between adaptability and complexity
2Adaptability or versatility
If transmission information is indicated for each resource separately, then the adaptability is improved, but the overhead increases
Solution Approach 1:
The patent merges transmission information indication for multiple subbands into a unified indication mechanism. By combining resource information (SRS resource indicator, number of antenna ports) with transmission information (precoding matrix indicator, number of transmission streams) in a coordinated manner, the system reduces redundant indications while maintaining the ability to adapt transmission parameters across different subbands
Solution Approach 2:
The patent creates a universal transmission indication framework where a single set of indication mechanisms serves multiple functions: indicating SRS resources, precoding matrices, and transmission stream numbers simultaneously. This multi-functional indication reduces overhead by eliminating the need for separate indications for each parameter
Data Source
AI summary
A signal transmission method and device are disclosed. The method includes: a network side device first determines transmission information that is used for uplink signal transmission and that corresponds to first resource information, then generates transmission indication information according to the transmission information, and finally indicates the transmission indication information to a terminal so that the terminal determines, according to the transmission indication information, transmission information corresponding to an uplink signal on a frequency domain resource, and transmits the uplink signal according to the transmission information.