TRP Priority Sequencing for Low-Complexity CA Positioning
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Solution Overview
Problem
The challenge in carrier aggregation (CA) positioning scenarios is the high processing complexity for measuring positioning reference signals (PRS) by terminal devices, which hinders efficient bandwidth utilization and accuracy improvement.
Innovation Solution
A method is introduced to determine priorities among transmission and reception points (TRPs) based on predefined or preconfigured rules, reducing frequency band switching and FFT switching, thereby lowering processing complexity and resource overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If carrier aggregation positioning is used to increase PRS bandwidth, then positioning accuracy is improved, but processing complexity of measuring PRS by terminal device increases
Solution Approach 1:
The network side performs preliminary actions by pre-configuring priority information for multiple TRPs and pre-establishing the measurement sequence. The terminal device follows this pre-defined sequence to measure PRS from different TRPs, which determines the measurement order in advance and avoids complex real-time decisions, thereby reducing processing complexity while maintaining high positioning accuracy through carrier aggregation
2Measurement precision
If terminal device measures PRS from multiple TRPs with different frequency bands, then positioning accuracy is improved, but frequency band switching and FFT switching increase processing complexity
Solution Approach 1:
The network side pre-configures priority information that determines the measurement sequence for TRPs with different frequency bands. The terminal device measures PRS from TRPs in the predetermined priority order, which optimizes the measurement sequence to minimize frequency band switching and FFT switching operations, thereby reducing processing complexity while maintaining positioning accuracy
Solution Approach 2:
The system dynamically adjusts the measurement sequence based on the priority configuration. The terminal device adapts its measurement order according to the pre-configured TRP priorities, allowing flexible optimization of frequency band switching operations while maintaining high positioning accuracy through carrier aggregation of multiple frequency bands
Data Source
AI summary
This application relates to the field of communication technologies, and discloses a communication method and apparatus. The method includes: A terminal device determines priorities of a plurality of TRPs, and measures reference signals from the plurality of TRPs based on the priorities of the plurality of TRPs. The priorities of the plurality of TRPs are: A priority of a first TRP is higher than a priority of a second TRP; and/or the priority of the second TRP is higher than a priority of a third TRP. Reference signals from the first TRP are on a first frequency band group; reference signals from the second TRP are on a second frequency band group, and a total bandwidth of the first frequency band group is the same as a total bandwidth of the second frequency band group.