Balance radios, drones, and sensors on busy job sites. Allocate spectrum fairly and forecast throughput for crews. Export results for daily shift planning reports.
| Scenario | Spectrum (MHz) | Eff. Legacy | Eff. New | Demand Legacy (Mbps) | Demand New (Mbps) | Overhead (%) | Min Legacy (%) | Min New (%) |
|---|---|---|---|---|---|---|---|---|
| Baseline day shift | 20 | 1.5 | 2.8 | 18 | 35 | 12 | 25 | 25 |
| High video usage | 20 | 1.5 | 2.6 | 20 | 55 | 15 | 30 | 25 |
| More spectrum available | 40 | 1.7 | 3.0 | 22 | 60 | 12 | 25 | 25 |
Modern construction relies on connected radios, tablets, cameras, drones, and sensors. When multiple systems compete for the same band, performance becomes unpredictable. Dynamic spectrum sharing estimates how airtime can be split between legacy users and newer devices, helping planners avoid outages during lifts, pours, inspections, and safety briefings.
The calculator converts spectrum in megahertz and spectral efficiency into an expected full-airtime capacity. This capacity represents best-case throughput if one group used the channel alone. A control overhead factor then reduces capacity to reflect scheduling, signaling, and real-world retransmissions, creating a more usable planning figure.
By entering peak demand for both groups, the model estimates how much airtime each would need to meet that demand. If total airtime needed exceeds 100%, the network is congested. Minimum shares protect critical traffic, while priorities bias remaining airtime toward the group that must deliver time-sensitive work.
Results highlight delivered and unmet throughput, per-device averages, and a fairness index. Use them to decide whether to add spectrum, relocate access points, improve link quality, or reschedule heavy uploads. Documenting these assumptions supports daily coordination meetings and reduces disputes when performance varies across crews.
Exporting CSV and PDF outputs makes it easy to attach calculations to method statements, temporary works plans, or site IT logs. After each shift, compare reported congestion with actual complaints and update efficiency and overhead values. Over time, the calculator becomes a practical baseline for improving coverage and reliability. This supports proactive upgrades before critical milestones and reduces downtime across the project.
Dynamic spectrum sharing is a time-based method that lets legacy and newer devices use the same spectrum. The scheduler assigns airtime to each group so both can operate without needing separate bands.
Use field experience, vendor link budgets, or pilot tests. Lower values fit long distances, obstructions, and interference. Higher values fit strong signals, good antennas, and stable line-of-sight paths.
It represents protocol signaling, scheduling messages, guard time, and practical retransmissions. Higher overhead reduces usable throughput and can explain why measured performance is lower than a simple capacity estimate.
Congestion occurs when the combined airtime needed to meet both demands exceeds 100%. In that case, the tool allocates minimum shares first and then splits remaining airtime using priorities.
Set minimums to protect safety-critical and supervisory traffic. Keep the combined minimum shares at or below 100% so the system can still adapt to changing demand during the shift.
It summarizes how balanced per-device throughput is between the two groups. Values closer to 1 indicate more equal sharing, while lower values suggest one group is receiving much higher per-device service.
Increase available spectrum, improve antenna placement, reduce interference sources, or lower peak demand by scheduling heavy uploads. Also revisit overhead and efficiency estimates to match real conditions.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.