Wireless Communication Precoding Adaptation for TRP Scheduling
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Solution Overview
Problem
In wireless communication systems, particularly in LTE and NR systems, the increase in the number of antennas leads to higher channel estimation and feedback overheads for codebook-based precoding, complicating the blind detection of scheduling signals in User Equipment (UE) that support both codebook-based and non-codebook-based precoding modes.
Innovation Solution
A method where the UE determines and transmits radio signals using distinct air interface resources for codebook-based and non-codebook-based precoding, each with specific scheduling information, reducing complexity by allowing each Transmitter Receiver Point (TRP) to select the optimal precoding mode based on its conditions, thereby optimizing transmission quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE supports both codebook-based and non-codebook-based precoding modes to adapt to different TRP conditions, then the adaptability of the system is improved, but the complexity of blind detection of scheduling signals increases
Solution Approach 1:
The patent segments the air interface resources into distinct resource sets (first resource set for codebook-based precoding, second resource set for non-codebook-based precoding). This segmentation allows the UE to identify the precoding mode through resource set association rather than blind detection of multiple signaling formats, thereby reducing detection complexity while maintaining support for both precoding modes
Solution Approach 2:
The patent introduces an intermediary mechanism where the association between air interface resources and precoding modes serves as a mediator. Instead of directly detecting precoding mode indicators in scheduling signals, the UE uses the resource set association as an intermediary to determine the precoding mode, simplifying the detection process while preserving adaptability
2Reliability
If the number of antennas is increased to improve multiantenna transmission capability, then the transmission quality is improved, but the channel estimation and feedback overheads increase
Solution Approach 1:
The patent segments the precoding approach into codebook-based and non-codebook-based modes, each suitable for different antenna configurations and channel conditions. This segmentation allows the system to optimize for multiantenna transmission quality while managing overhead by selecting the appropriate precoding mode for the given antenna count and channel state
Solution Approach 2:
The patent enables dynamic parameter changes by allowing the system to switch between different precoding modes based on antenna configuration and channel conditions. This parameter adaptation optimizes the balance between transmission quality and overhead, particularly for systems with large numbers of antennas where non-codebook-based precoding can reduce feedback requirements
Data Source
AI summary
The disclosure provides a method and a device in a User Equipment (UE) and a base station for wireless communication. The UE receives first information, receives a first signaling and transmits a first radio signal. The first information is used for determining a first air interface resource and a second air interface resource, and the first signaling includes scheduling information of the first radio signal; in instances in which the first radio signal is related to the first air interface resource, the scheduling information of the first radio signal is codebook-based; in instances in which the first radio signal is related to the second air interface resource, the scheduling information of the first radio signal is non-codebook-based. The above method has following benefits: when multiple TRPs serve one UE simultaneously, each TRP can select an optimal precoding mode depending on its own actual condition.