PTRS Configuration for Mixed MCS Wireless Transmission
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Solution Overview
Problem
High-frequency wireless communication systems face challenges in managing data signalling, particularly with beamforming and multiple TRPs, which require efficient handling of Phase Tracking Reference Signalling (PTRS) to maintain consistent operation and phase error correction in millimeter wave communication.
Innovation Solution
The implementation of a method where a transmitting radio node and a receiving radio node use PTRS based on different Modulation and Coding Schemes (MCS) for different sets of data blocks, with PTRS density and power scaling adjusted accordingly to ensure smooth operation and phase error correction, facilitating consistent reception and decoding without unnecessary switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PTRS is configured for each data block with different MCS, then phase error correction accuracy is improved, but system complexity and switching overhead increase
Solution Approach 1:
The patent applies parameter changes by configuring PTRS density and power scaling based on MCS thresholds. When MCS is below a threshold, PTRS density is set to a first value; when MCS is above the threshold, PTRS density is set to a second value. This dynamic parameter adjustment resolves the contradiction by optimizing phase error correction for high MCS while reducing complexity for low MCS scenarios.
Solution Approach 2:
The patent implements dynamics by making PTRS configuration adaptive to MCS conditions. The system dynamically switches between different PTRS density values and power scaling factors based on the current MCS, allowing the phase tracking mechanism to adapt its complexity level according to the actual modulation and coding scheme being used.
2Measurement precision
If PTRS density is increased for high MCS, then phase tracking precision is improved, but power consumption increases
Solution Approach 1:
The patent applies parameter changes by configuring PTRS power scaling factor based on MCS thresholds and power control activation. When power control is activated and MCS exceeds the threshold, the PTRS power scaling factor is adjusted; otherwise, it uses a default value. This resolves the contradiction by increasing power consumption only when high phase tracking precision is actually needed for high MCS transmissions.
Solution Approach 2:
The patent implements dynamics by making PTRS power consumption adaptive to both MCS conditions and power control state. The system dynamically adjusts PTRS power scaling based on the combination of MCS value and power control activation status, optimizing the balance between phase tracking precision and power consumption in real-time.
3Reliability
If beamforming and multiple TRPs are used, then communication reliability is improved, but PTRS management complexity increases
Solution Approach 1:
The patent applies universality by creating a unified PTRS management mechanism that handles both single-TRP and multi-TRP scenarios, as well as various beamforming configurations, through a single threshold-based decision framework. This universal approach resolves the contradiction by providing consistent PTRS management across different reliability-enhancing techniques without requiring separate complex management procedures for each case.
Data Source
AI summary
There is disclosed a method of operating transmitting radio node in a wireless communication network. The method includes transmitting data signalling, the data signalling representing a plurality of data blocks, wherein a first set of data blocks of the plurality of data blocks is associated to a first Modulation and Coding Scheme, MCS, and wherein a second set of data blocks of the plurality of data blocks is associated to a second MCS, the first MCS being different from the second MCS. Phase Tracking Reference Signalling, PTRS, associated to the first set of data blocks is based on the second MCS, and/or PTRS associated to the second set of data blocks is based on the first MCS. The disclosure also pertains to related devices and methods.