Multi-Panel PT-RS Port Association for Wireless Phase Tracking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting phase tracking reference signals across multiple panels, which is crucial for improved signal transmission and reception, especially in next-generation radio access technologies like 3GPP NR.
Innovation Solution
A method and apparatus for transmitting phase tracking reference signals (PT-RS) across multiple panels (STxMP) by associating PT-RS ports with demodulation reference signal (DM-RS) ports based on downlink control information (DCI), allowing simultaneous transmission of PT-RS on multiple ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phase tracking reference signals are transmitted across multiple panels simultaneously, then signal transmission efficiency and reception quality are improved, but system complexity and resource management difficulty increase
Solution Approach 1:
The patent segments the phase tracking reference signal transmission by associating different PT-RS ports with different DM-RS ports, where each DM-RS port corresponds to a specific panel. This segmentation allows independent phase tracking for each panel while maintaining overall system coordination, thus improving signal transmission efficiency without overwhelming system complexity
Solution Approach 2:
The patent introduces Downlink Control Information (DCI) as an intermediary mechanism that carries PT-RS port to DM-RS port association information. This intermediary enables coordinated multi-panel transmission by providing a centralized control mechanism that manages the relationships between reference signal ports, thereby improving reliability while keeping system complexity manageable through structured control signaling
2Measurement precision
If multiple PT-RS ports are used for simultaneous transmission, then phase tracking accuracy is improved, but resource overhead and signaling complexity increase
Solution Approach 1:
The patent makes the existing DCI structure multi-functional by extending it to carry both traditional scheduling information and the new PT-RS port to DM-RS port association information. This universal approach allows the same control channel to serve multiple purposes without requiring separate dedicated signaling resources, thus improving phase tracking accuracy while minimizing additional resource overhead
Solution Approach 2:
The patent merges the phase tracking reference signal management with the existing demodulation reference signal framework by establishing port associations between PT-RS and DM-RS. This combining approach allows phase tracking to leverage existing DM-RS port structures and resource allocations, improving measurement precision without proportionally increasing resource overhead
Data Source
AI summary
The present disclosure relates to a method performed by user equipment (UE) in a wireless communication system. Particularly, the method comprises the steps of: receiving, from a base station (BS), downlink control information (DCI) for simultaneous transmission across multiple panels (STxMP); and on the basis of association information between a phase tracking (PT)-reference signal (RS) port and a demodulation (DM)-RS port included in the DCI, to the BS, transmitting a first PT-RS on a first PT-RS port and transmitting a second PT-RS on a second PT-RS port, wherein first information of the association information between the PT-RS port and the DM-RS port indicates a first DM-RS port associated with the first PT-RS port, from among DM-RS ports corresponding to at least one of a first sounding reference signal resource indicator (SRI) and first precoding information, and second information of the association information between the PT-RS port and the DM-RS port indicates a second DM-RS port associated with the second PT-RS port, from among DM-RS ports corresponding to at least one of a second SRI and second precoding information.