User Equipment Receiver Processing for Multi-TRP Synchronization
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving low latency and high reliability in multi-transmit-receive-point communication scenarios, particularly due to synchronization issues between transmit receive points (TRPs), which affect receiver performance.
Innovation Solution
The implementation of a method in user equipment (UE) to determine common parameters based on reference signals from multiple TRPs, allowing for the performance of tracking loop operations such as frequency and time tracking loops, which helps in channel estimation and data processing across multiple TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate tracking loops are maintained for each TRP, then synchronization accuracy between TRPs is improved, but receiver processing complexity increases
Solution Approach 1:
The patent combines multiple TRP-specific tracking loops into a single common tracking loop that processes reference signals from multiple TRPs together. This merging approach maintains synchronization accuracy by treating all TRPs uniformly while significantly reducing receiver processing complexity by eliminating the need to maintain separate tracking states for each TRP.
Solution Approach 2:
The common tracking loop is designed to handle reference signals from multiple TRPs simultaneously, making it a universal solution that serves all TRPs with a single processing mechanism. This multi-functional approach allows the same tracking loop structure to be reused across different TRPs, reducing overall system complexity while maintaining accuracy.
2Device complexity
If common parameters are used for tracking loop operations across multiple TRPs, then receiver processing load is reduced, but synchronization precision between TRPs deteriorates
Solution Approach 1:
The patent merges the parameter determination process for multiple TRPs into a single common parameter set derived from combined reference signal processing. This approach reduces receiver processing load by using unified parameters across all TRPs while maintaining synchronization precision through the coordinated processing of multiple reference signals within the same tracking loop framework.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a first set of parameters based at least in part on a first reference signal received from a first transmit receive point (TRP) and a second set of parameters based at least in part on a second reference signal received from a second TRP; determine a common parameter using the first set of parameters and the second set of parameters; and perform a tracking loop operation using the common parameter or the first set of parameters and the second set of parameters, wherein the tracking loop operation comprises at least one of a frequency tracking loop operation or a time tracking loop operation. Numerous other aspects are provided.