Positioning Relay Station Correction Data Adaptation

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Solution Overview

Problem

Existing positioning systems face challenges in accurately determining the coordinates of a terminal when the communication bandwidth available from a reference station is limited, as they require efficient transmission of correction information across multiple relay stations.

Innovation Solution

The system employs a multi-hop network configuration using relay stations to transmit correction information from a reference station to a terminal, where the correction information is generated based on the coordinates of relay stations communicating with the terminal, optimizing bandwidth usage through multi-cast transmission and generation of correction information based on available bandwidth conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If correction information is transmitted from reference station to terminal through multiple relay stations, then positioning can be performed in narrow bandwidth conditions, but transmission efficiency and positioning accuracy may deteriorate

Engineering Contradiction:

Improvepositioning capability in narrow bandwidthVSAvoidpositioning accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent generates different correction information for different relay stations based on their specific characteristics and positions. Each relay station receives correction information tailored to its local conditions, which maintains positioning accuracy despite the multi-hop transmission path. This local customization prevents the degradation of correction quality that would occur with a single universal correction message.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The correction information transmission is segmented into multiple parts, with each relay station receiving and forwarding specific correction data relevant to its segment of the transmission path. This segmentation allows the system to maintain accurate positioning by ensuring each relay station has the appropriate correction information for its specific location and signal characteristics.

Inventive Principle:

Principle #1Segmentation

2Area of stationary object

If correction information is transmitted through multiple relay stations, then coverage area is extended, but communication overhead and transmission time increase

Engineering Contradiction:

Improvecoverage areaVSAvoidtransmission time

Core Design Contradiction:

Area of stationary objectVSLoss of time

Solution Approach 1:

The reference station generates and transmits correction information to relay stations in advance, before the terminal requires positioning services. This preliminary action allows relay stations to have correction information ready, reducing the actual positioning latency when terminals need services. The system prepares correction data proactively rather than reactively.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Correction information is copied and distributed to multiple relay stations simultaneously through multi-cast transmission. This copying approach allows the same correction data to reach multiple relay stations in parallel, extending coverage area without proportionally increasing transmission time. Each relay station receives a copy of the necessary correction information.

Inventive Principle:

Principle #26Copying

3Measurement precision

If correction information is generated for each relay station, then positioning accuracy is maintained, but communication bandwidth consumption increases

Engineering Contradiction:

Improvepositioning accuracyVSAvoidcommunication bandwidth consumption

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent uses multi-cast transmission to send correction information to multiple relay stations simultaneously through a single communication channel. This multi-functional approach allows one transmission to serve multiple relay stations, maintaining positioning accuracy across different locations while avoiding the need for separate unicast transmissions to each relay station, thus conserving bandwidth.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS10871577B2Positioning method, positioning system, correction information generation method, correction information generation device, and positioning system relay station and terminal

Publication Date: 2020.12.22 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

The present disclosure can perform positioning of a terminal even though a communication bandwidth capable of being used by a reference station is narrow. In a positioning method, a positioning system, a correction information generation method, and a correction information generation apparatus of the present disclosure, coordinates of a terminal are positioned by using the reference station, a plurality of relay stations communicating with the reference station, and the terminal communicating with the relay station. In the positioning method, the positioning system, the correction information generation method, and the correction information generation apparatus of the present disclosure, information for specifying the relay station communicating with the terminal is acquired, and the correction information is generated based on the positioning signal from a satellite which is received by the reference station based on the coordinates of the relay station communicating with the terminal. In the positioning method and the positioning system of the present disclosure, the reference station transmits the correction information to the terminal via the relay station.