What happens when an athlete enters a forest, mountain area, or remote racecourse and suddenly loses mobile network coverage?

For a typical mobile application, this may mean that location updates stop reaching the server. For a dedicated sports tracking system, this situation requires a more carefully designed solution.

That is why Sport Flow Solutions focuses not only on GPS accuracy but also on the reliability of the entire data collection and transmission system.

GPS and Mobile Connectivity Are Different Technologies

Many people think of GPS and mobile internet as one connected technology. In reality, they perform two different functions.

A GPS/GNSS receiver determines location using signals from navigation satellites. An LTE mobile connection transmits those coordinates to a remote server.

Losing cellular coverage therefore does not necessarily mean losing satellite positioning.

An athlete may continue moving while the device continues calculating coordinates, even though the coach temporarily stops receiving updates.

This raises an important question: what happens to the location data that cannot be transmitted immediately?

Why Local Data Storage Matters

The GPS tracker currently being developed by Sport Flow Solutions is designed to support local data storage using a MicroSD card.

The purpose is to preserve movement history even when the connection to the server is temporarily unavailable.

This is particularly relevant for:

  • Orienteering and trail running
  • Cross-country skiing and mountain sports
  • Long-distance cycling training
  • Competitions in remote outdoor environments

When connectivity returns, recorded information should remain available for later transmission or analysis. The exact recovery and synchronization mechanisms are still part of the development and testing process.

A temporary loss of mobile coverage should not automatically mean losing the entire training history.

Why the Last Known Position Is Not Always the Current Position

Another important challenge is how tracking information is presented to coaches.

Imagine an athlete running through a forest. The last location update was received several minutes ago.

If the system simply displays a dot on the map, someone might incorrectly assume that the athlete is still at that exact location.

This is why a well-designed tracking interface needs to communicate not only location coordinates but also when those coordinates were last received.

Coaches need to distinguish between a current position and a last known position.

That distinction becomes especially important when GPS tracking is used as an additional safety tool during outdoor sports.

How We Are Designing Sport Flow Solutions

We are developing our own wearable GPS tracking device specifically for sports training and competitions.

The planned hardware architecture includes:

  • A dedicated dual-band GNSS module for positioning
  • An LTE modem for direct data transmission to the server
  • MicroSD storage for local data recording
  • Bluetooth Low Energy connectivity for external sensors
  • Battery monitoring and power-management components

Our engineering approach considers more than the specifications of individual components.

We are examining how positioning, communication, storage, and power management interact during movement, vibration, unstable network conditions, and extended training sessions.

The hardware is currently under development. Real-world positioning performance, communication reliability, and data recovery still need to be evaluated through prototype testing.

Our Goal Goes Beyond Displaying Coordinates

Sport Flow Solutions is being developed as a GPS tracking and athlete monitoring system for coaches, athletes, and sports event organizers.

Our goal is to make outdoor athlete tracking more informative and reliable, particularly when athletes are outside the coach's direct line of sight.

We believe a reliable sports tracker should do more than display a location. It should also handle interruptions responsibly and clearly communicate when information is no longer current.

Follow the development of Sport Flow Solutions as we continue sharing our engineering decisions, prototype testing, and progress toward building our own GPS tracking device.

https://www.sportflow.pro/