Terminal Device Indoor Positioning via Distributed Antenna Segmentation
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Solution Overview
Problem
Current indoor positioning methods using the observed time difference of arrival (OTDOA) technology face challenges in achieving accurate positioning due to weak or absent signals in multipath and non-line of sight environments, leading to poor positioning accuracy in indoor settings.
Innovation Solution
A terminal device and network device system that identifies reference signals from multiple antenna elements using frequency domain or code domain separation techniques, allowing the terminal device to distinguish between signals and improve indoor positioning accuracy by measuring time differences or scrambling codes, enabling precise location determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If OTDOA positioning method is used with macro base stations, then positioning can be implemented in mobile telecommunications network, but positioning accuracy deteriorates in indoor environments due to weak or absent signals in multipath and non-line of sight conditions
Solution Approach 1:
The patent segments the base station antenna system into multiple distributed antenna elements. Each antenna element transmits reference signals with unique identifiers, allowing the terminal to distinguish between direct path signals and multipath signals. This segmentation enables accurate positioning in indoor environments where traditional macro base station signals fail due to NLOS conditions.
2Adaptability or versatility
If traditional macro base station signals are used for indoor positioning, then network infrastructure can be utilized, but signal quality deteriorates due to multipath and non line of sight environment impact
Solution Approach 1:
The patent implements local quality by assigning different attribute information (identifiers) to reference signals transmitted by different antenna elements. This allows the terminal device to locally identify and select signals from antenna elements that provide line-of-sight paths, thereby maintaining signal quality while utilizing the existing network infrastructure for indoor positioning.
Data Source
AI summary
Embodiments of the present invention provide a terminal device and a positioning system, and relate to the field of communications technologies. The terminal device is configured to: obtain identifiers of at least two antenna elements and attribute information of a reference signal corresponding to each of the at least two antenna elements; receive at least two reference signals based on the attribute information, where the at least two reference signals are sent by corresponding antenna elements of the at least two antenna elements, respectively; obtain positioning information; and send, to the network device, the positioning information and identification information of antenna elements corresponding to the positioning information. Positioning signals obtained by different antenna elements are different, so that the terminal device can identify which antenna element a received positioning signal comes from. Therefore, an improved distributed antenna system can implement terminal device positioning, and improve indoor positioning accuracy.