Uplink Channel Estimation Mapping for Multi-TRP Joint Reception
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing channel estimation methods in wireless communication systems, such as those in 5G and future 6G networks, are inadequate for optimizing joint channel estimation, particularly in scenarios involving multiple TRPs and different duplexing modes, leading to suboptimal performance in uplink transmissions.
Innovation Solution
A mapping pattern is determined for uplink transmissions using at least two different reference signal resource sets, spatial settings, or power control parameters sets, based on whether joint channel estimation is enabled, considering duplexing mode and RRC configurations, to enhance channel estimation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing channel estimation methods are used in wireless communication systems, then basic uplink transmission functionality is maintained, but channel estimation performance is suboptimal particularly in scenarios involving multiple TRPs and different duplexing modes
Solution Approach 1:
The patent implements dynamic mapping patterns that adapt to different duplexing modes (TDD/FDD) and joint channel estimation configurations. The mapping pattern between reference signal resource sets and uplink transmissions is dynamically determined based on whether joint channel estimation is enabled, allowing the system to optimize channel estimation performance for multiple TRPs while maintaining compatibility with different duplexing modes
Solution Approach 2:
The patent changes key parameters including the mapping pattern between reference signal resource sets and uplink transmissions, power control parameters, and spatial settings. By dynamically adjusting these parameters based on joint channel estimation configuration and duplexing mode, the system achieves improved channel estimation performance across multiple TRPs without sacrificing adaptability
2Reliability
If joint channel estimation is enabled across multiple TRPs, then uplink channel estimation performance and coverage are improved, but system complexity increases due to multiple reference signal resource sets and mapping pattern determination
Solution Approach 1:
The patent segments the channel estimation process by configuring multiple reference signal resource sets (e.g., SRS resource sets) that can be independently mapped to different uplink transmissions. This segmentation allows joint channel estimation across multiple TRPs while maintaining manageable system complexity through structured resource set management and deterministic mapping patterns
Solution Approach 2:
The patent creates a universal mapping pattern mechanism that works across different duplexing modes (TDD and FDD) and supports both joint and non-joint channel estimation scenarios. The same framework handles multiple reference signal resource sets, spatial settings, and power control parameters, reducing overall system complexity through a unified approach
3Productivity
If mapping pattern determination depends on joint channel estimation configuration and duplexing mode, then channel estimation efficiency is enhanced, but processing overhead increases
Solution Approach 1:
The patent performs preliminary configuration of mapping patterns between reference signal resource sets and uplink transmissions based on joint channel estimation enablement and duplexing mode. By determining the mapping pattern in advance through configuration messages (RRC signaling or DCI), the system enhances channel estimation efficiency without requiring complex real-time processing during uplink transmissions
Data Source
AI summary
According to an example aspect of the present disclosure, there is provided an apparatus comprising means for receiving, from a wireless network node, a configuration configuring the apparatus to transmit uplink transmissions using at least two different reference signal resource sets, at least two different spatial settings or at least two different power control parameters sets, means for determining a mapping pattern for transmitting said uplink transmissions using the at least two different reference signal resource sets, the at least two different spatial settings or the at least two different power control parameters sets, wherein the mapping pattern depends at least on whether joint channel estimation is enabled or disabled for the apparatus and means for transmitting said uplink transmissions using the at least two different reference signal resource sets, the at least two different spatial settings or the at least two different power control parameters sets in accordance with the determined mapping pattern.