PT-RS Transmission Mode for Multi-PUSCH Spatial Separation
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Solution Overview
Problem
The simultaneous transmission of multiple physical uplink shared channels (PUSCHs) by a terminal device to two transmission reception points (TRPs) can cause resource location conflicts between phase-tracking reference signals (PT-RSs), leading to reduced performance of common phase error compensation and increased interference levels.
Innovation Solution
A method for wireless communication where a terminal device determines a transmission mode for at least two PT-RSs corresponding to at least two PUSCHs, and transmits the PUSCHs according to this mode. The transmission mode includes either not transmitting a portion of the PT-RSs or ensuring that at least a portion of their resource locations are not overlapped.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simultaneous transmission of multiple PUSCHs is supported, then transmission productivity is improved, but PT-RS resource location conflicts occur
Solution Approach 1:
The patent segments the PT-RS transmission by spatial parameters, assigning different spatial domain resources to PT-RSs of different PUSCHs. This allows multiple PUSCHs to be transmitted simultaneously while avoiding PT-RS resource location conflicts through spatial separation.
Solution Approach 2:
The patent introduces spatial parameters as an additional dimension for PT-RS transmission. By utilizing spatial domain resources (different spatial parameters) rather than only frequency or time domain resources, the system enables simultaneous multi-PUSCH transmission without PT-RS conflicts.
2Measurement precision
If PT-RS resource location conflicts are avoided, then common phase error compensation performance is improved, but transmission mode complexity increases
Solution Approach 1:
The patent applies preliminary action by determining the transmission mode for PT-RSs before the actual transmission. The network device or terminal device determines in advance which PT-RSs to transmit and their spatial parameter assignments, preventing conflicts before they occur rather than resolving them during transmission.
Solution Approach 2:
The patent changes the transmission parameters of PT-RSs by assigning different spatial parameters to different PUSCHs. This parameter change allows the system to maintain PT-RS orthogonality and avoid conflicts while enabling simultaneous multi-PUSCH transmission, balancing precision requirements with transmission efficiency.
Data Source
AI summary
A method for wireless communication includes: determining, by a terminal device, a transmission mode for at least two phase-tracking reference signals (PT-RSs), where the at least two PT-RSs correspond to at least two physical uplink shared channels (PUSCHs); and transmitting the at least two PUSCHs according to the transmission mode for the at least two PT-RSs, where the at least two PUSCHs are associated with different spatial parameters; where the transmission mode for the at least two PT-RSs includes at least one of the following: a portion of PT-RSs of the at least two PT-RSs being not transmitted; or that at least portion of resource locations of the at least two PT-RSs being not overlapped.