Location Identification via Distance Packets and Access Point Coordinates
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Solution Overview
Problem
Existing methods for identifying the location of communication terminals are limited by distance errors and require multiple accessible terminals, making it impossible to identify locations if certain terminals are absent.
Innovation Solution
A location identification apparatus that receives distance packets containing start-point, end-point, and terminal distances, along with coordinate values of access points, to accurately determine the location of each communication terminal, even in scenarios where not all terminals are present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If location information is acquired from a terminal at a short distance, then location identification is possible, but the terminal must be present at a short distance and errors increase with larger distances
Solution Approach 1:
The patent introduces distance packets as intermediary carriers that transmit distance information between terminals and access points. These packets enable indirect measurement of distances beyond direct communication range by utilizing multiple access points as intermediaries, thereby extending the effective identification range while maintaining accuracy through triangulation calculations.
Solution Approach 2:
The patent transitions from one-dimensional direct distance measurement to multi-dimensional spatial positioning by incorporating coordinates of multiple access points. This dimensional expansion allows the system to calculate terminal positions using triangulation across a two-dimensional plane, overcoming the limitations of linear distance constraints.
2Reliability
If multiple accessible terminals are required for location identification, then geometric derivation of directional relationships is possible, but it becomes impossible to identify locations if certain terminals are absent
Solution Approach 1:
The patent makes access points universal reference objects that can serve multiple terminals simultaneously. Instead of requiring specific terminal combinations, any terminal can use any accessible access point for position calculation. This universal reference system allows location identification to proceed with fewer terminals by leveraging the shared coordinate framework of access points.
Solution Approach 2:
The system enables terminals to self-determine their positions using distance packets from access points without requiring other terminals to be present. Each terminal independently calculates its location based on measured distances to access points and their known coordinates, eliminating the dependency on other terminals being available for geometric derivation.
Data Source
AI summary
A communication terminal (200) propagates a distance packet, and the distance packet is transmitted to a location identification apparatus (300) via an access point (110). The distance packet includes a start-point distance, an end-point distance, and a terminal distance. The start-point distance is a distance between a start-point terminal and a start-point point, which is an access point detected by the start-point terminal. The end-point distance is a distance between an end-point terminal and an end-point point, which is an access point detected by the end-point terminal. The terminal distance is a distance between each other of communication terminals. The location identification apparatus identifies a location of each communication terminal based on distances included in the distance packet, coordinate values of the start-point point, and coordinate values of the end-point point.