Random Access TA Positioning for Low-Capability Terminals
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Solution Overview
Problem
Existing positioning methods for terminal devices require high performance capabilities and complex operations, limiting their applicability to devices that cannot support advanced positioning algorithms.
Innovation Solution
Positioning terminal devices using multiple Timing Advances (TAs) corresponding to multiple cells, leveraging random access capabilities commonly supported by terminal devices, thereby reducing performance requirements and enabling positioning for devices with simpler hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional positioning methods are used, then positioning accuracy can be achieved, but terminal device performance requirements are high and the process is complex
Solution Approach 1:
The patent extracts the core positioning function from complex positioning algorithms by utilizing TA values that are already generated during normal random access procedures. Instead of requiring terminal devices to perform complex positioning operations, the system extracts positioning information from existing signaling messages, thereby reducing terminal device complexity while maintaining positioning accuracy.
Solution Approach 2:
The patent makes TA values serve multiple functions: they are used both for uplink timing synchronization during normal communication and for positioning purposes. By enabling TA values to fulfill dual roles, the patent eliminates the need for separate positioning operations, reducing terminal device performance requirements while achieving positioning accuracy.
2Measurement precision
If complex positioning algorithms are implemented, then positioning accuracy is improved, but terminal device performance requirements increase
Solution Approach 1:
The patent enables the network side to perform positioning calculations autonomously using TA values obtained from random access procedures. The terminal device only needs to provide basic signaling information, while the network side computes positioning results using its own processing power. This self-service approach on the network side eliminates the need for terminal devices to have high processing capabilities while maintaining positioning accuracy.
Solution Approach 2:
The patent introduces TA values as an intermediary that carries positioning information from the random access process. Instead of requiring terminal devices to execute complex positioning algorithms, the TA values serve as intermediaries that convey timing information to the network side, which then performs the actual positioning calculations, reducing terminal device power requirements.
3Measurement precision
If multiple TAs from multiple cells are used, then positioning accuracy is improved, but the positioning process becomes more complex
Solution Approach 1:
The patent merges the positioning process with the existing random access procedure by obtaining TA values from multiple cells during normal access operations. Instead of adding separate positioning steps, the patent combines positioning data collection with routine communication procedures, thereby improving positioning accuracy through multi-cell TA values without increasing operational complexity for terminal devices.
Data Source
AI summary
Provided in the present application are a positioning method, a terminal device, and a network device. One example method includes: transmitting, by a terminal device, a plurality of sequences to base stations of a plurality of cells; and receiving, by the terminal device, a plurality of TAs corresponding to the plurality of cells.