Indoor Terminal Positioning via Pico RRU Signal Convergence
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Solution Overview
Problem
Existing indoor distributed communication systems face challenges in accurately positioning terminal devices within buildings due to signal attenuation and the fact that multiple Pico RRUs often form a single logical cell, making traditional base station positioning methods ineffective.
Innovation Solution
A method involving a Building Baseband Unit (BBU) that identifies multiple Pico Radio Remote Units (Pico RRUs) corresponding to a logical cell where a target terminal device is located, acquires converged signals from these Pico RRUs, and calculates the geographic location of the terminal device based on these signals and the location information of at least three Pico RRUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional base station positioning methods are used in indoor distributed systems, then the system structure is simple, but positioning accuracy deteriorates because multiple Pico RRUs form a single logical cell
Solution Approach 1:
The patent segments the logical cell into multiple physical Pico RRU units, each with independently identifiable characteristics. By treating each Pico RRU as a separate positioning reference point with its own geographic location information, the system can perform triangulation or multilateration to achieve accurate indoor positioning, effectively resolving the contradiction between maintaining simple system structure and achieving high positioning accuracy.
2Measurement precision
If GPS positioning is used for indoor locations, then the system is simple to implement, but positioning accuracy deteriorates due to signal attenuation by buildings
Solution Approach 1:
The patent introduces indoor Pico RRUs as intermediary positioning reference points that operate within the building environment. These Pico RRUs receive and process signals locally, avoiding the need for external GPS signals to penetrate building structures. This intermediary approach eliminates the harmful effect of signal attenuation by buildings while maintaining system simplicity.
3Measurement precision
If converged signals from multiple Pico RRUs are acquired for positioning, then positioning accuracy is improved, but the complexity of signal processing increases
Solution Approach 1:
The patent merges signals from multiple Pico RRUs at the baseband processing unit, which is already part of the standard network infrastructure. By combining the signal processing functionality with existing baseband processing capabilities, the system achieves improved positioning accuracy without adding significant processing complexity, as the convergence happens at a centralized point that already handles multiple signal streams.
Data Source
AI summary
A method for positioning a terminal device, a server, and a non-transitory storage medium are provided. The method may include, identifying several Pico RRUs corresponding to a logical cell where a target terminal device is located, in response to a request for positioning the target terminal device being received, and the number of Pico RRUs is ≥3; acquiring several converged signals corresponding to Pico RRUs, each by converging of, a processed radio frequency signal received by the current Pico RRU, and radio frequency signals received by other Pico RRUs than the current Pico RRU; calculating geographic location information of the target terminal device according to converged signals corresponding to Pico RRUs and geographic location information of at least three Pico RRUs; and sending positioning information of the target terminal device including at least the geographic location information to a sender of the request for positioning.