LOS/NLOS Indication for Positioning Accuracy
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Solution Overview
Problem
Current mobile communication technologies face challenges in accurately determining the line of sight (LOS) or non-line of sight (NLOS) attributes of radio links, which affects positioning accuracy in mobile communication systems.
Innovation Solution
A method and apparatus for transmitting and receiving LOS/NLOS indication information, where a first device (such as a user equipment, base station, or transmit and receive point) transmits LOS/NLOS indication information corresponding to positioning measurement quantities to a positioning server, indicating the LOS or NLOS attribute of radio links, including LOS, NLOS, probability of LOS, or probability of NLOS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning measurement quantities are used without LOS/NLOS indication information, then the positioning process is simple, but the positioning accuracy deteriorates due to NLOS effects
Solution Approach 1:
The patent applies preliminary action by having the first device determine and transmit LOS/NLOS indication information before the positioning server performs positioning calculations. This advance preparation allows the positioning server to selectively use or compensate for measurements based on known LOS/NLOS conditions, thereby improving positioning accuracy without adding complex real-time processing.
Solution Approach 2:
The patent implements feedback by transmitting LOS/NLOS indication information from the first device to the positioning server. This feedback mechanism enables the positioning server to adjust its positioning algorithm based on the quality of the radio link, selecting appropriate measurements or applying compensations to mitigate NLOS effects and improve overall positioning accuracy.
2Measurement precision
If LOS/NLOS indication information is transmitted for each positioning measurement quantity, then positioning accuracy improves, but the signaling overhead increases
Solution Approach 1:
The patent applies merging by combining multiple LOS/NLOS indication information elements into a single comprehensive indication. Instead of transmitting separate LOS/NLOS indicators for each positioning measurement quantity, the system consolidates this information, reducing signaling overhead while still providing the positioning server with sufficient data to make informed decisions about measurement selection and compensation.
Solution Approach 2:
The patent implements universality by designing the LOS/NLOS indication information to serve multiple functions simultaneously. A single indication can provide information about multiple radio links, support different positioning methods, and enable both measurement selection and compensation operations, thereby reducing the need for separate dedicated signaling for each function.
Data Source
AI summary
Provided are a method and an apparatus for transmitting LOS/NLOS indication information, and a method and an apparatus for receiving LOS/NLOS indication information. The method includes: transmitting, by a first device, LOS/NLOS indication information corresponding to a positioning measurement quantity to a positioning server, wherein the first device includes at least one device of a UE, a base station, or a transmit and receive point (TRP), the LOS/NLOS indication information is used to indicate a LOS or NLOS attribute of a radio link associated with the positioning measurement quantity, and the LOS or NLOS attribute includes at least one of the following: a LOS, an NLOS, a probability of LOS or a probability of NLOS.