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The Global Positioning System (GPS) revolutionized positioning on Earth, providing precise location data through satellite ranging. The GPS system was developed in 1978 by the U.S. Department of Defense  for military use, and it became available for civilian applications in 1983, transforming fields including navigation, fleet management, and time synchronization for telecommunications systems.GPS consists of satellites in medium Earth orbit, about 20,200 kilometers above the surface,...
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Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
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GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
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The Earth's shape is best described as an ellipsoid, a slightly flattened sphere created by rotating an ellipse around its minor axis. This flattening results in the polar axis being about 21 kilometers shorter than the equatorial axis. In contrast, the geoid represents the Earth's gravitational shape and aligns with the mean sea level (MSL). The geoid is an irregular equipotential surface where gravity is perpendicular at every point. Variations in Earth's mass distribution cause geoid...
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BeiDou Satellite Positioning Method Based on IoT and Edge Computing.

Lina Wang1,2, Rui Qiu1

  • 1School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing 100083, China.

Sensors (Basel, Switzerland)
|February 13, 2020
PubMed
Summary
This summary is machine-generated.

China's BeiDou navigation system is enhanced for large-scale Internet of Things (IoT) applications. A new method uses edge computing and an improved genetic algorithm for efficient resource allocation and reduced delay, improving positioning precision for IoT terminals.

Keywords:
Beidou navigation satelliteedge computinginternet of thingsload balancingpseudo-range difference

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Area of Science:

  • Satellite Navigation Systems
  • Internet of Things (IoT)
  • Edge Computing

Background:

  • The BeiDou navigation satellite system (BDS) offers high-precision, all-weather, real-time positioning.
  • Emerging 5G and IoT technologies present challenges for BDS scalability and precision.
  • Large-scale IoT terminal scenarios require enhanced positioning capabilities.

Purpose of the Study:

  • To propose a BeiDou differential positioning method optimized for IoT and edge computing environments.
  • To address the computational demands of massive positioning requests from IoT terminals.
  • To improve positioning precision and reduce service delay for large-scale IoT applications.

Main Methods:

  • Implemented edge computing to offload computational pressure from data centers to edge nodes.
  • Utilized an improved genetic algorithm for resource allocation of terminal positioning requests to ensure load balancing.
  • Employed an optimized unscented Kalman filter based on the edge node (EUKF) algorithm to enhance positioning accuracy.

Main Results:

  • The proposed method effectively offloads computation to edge nodes, managing massive positioning requests.
  • Resource allocation using the improved genetic algorithm reduced service delay across the edge network.
  • The EUKF algorithm demonstrated improved positioning precision for IoT terminals.

Conclusions:

  • The developed BeiDou differential positioning method is suitable for large-scale IoT terminals.
  • The integration of IoT and edge computing enhances BDS performance for modern applications.
  • The method provides reliable, real-time positioning services with improved accuracy and efficiency.