Optimize spectrum sharing across cranes, sensors, and crews. Enter site radius, sectors, and channel plan. Get reuse factor, distance, and interference margin instantly now.
Use this tool to size clusters and estimate reuse separation for on-site connectivity planning.
This estimate is planning-grade. Real deployments depend on terrain, antenna patterns, scheduling, and power control.
| Scenario | Spectrum (MHz) | Channel (kHz) | Guard (%) | N | Sectors | R (m) | n | Reuse factor | D (m) |
|---|---|---|---|---|---|---|---|---|---|
| Dense site mesh | 20 | 200 | 5 | 7 | 3 | 450 | 3.7 | 0.1429 | 2061 |
| Wide yard coverage | 10 | 180 | 3 | 4 | 1 | 700 | 3.2 | 0.2500 | 2425 |
| High-capacity zones | 40 | 200 | 5 | 3 | 6 | 350 | 3.5 | 0.3333 | 1049 |
| Interference cautious | 15 | 150 | 6 | 9 | 3 | 500 | 4.0 | 0.1111 | 2598 |
| Compact indoor mix | 5 | 100 | 2 | 1 | 1 | 120 | 2.8 | 1.0000 | 208 |
Use these rows to sanity-check your inputs and expected scaling.
Construction sites run voice radios, IoT sensors, cameras, drones, and access points within short ranges. Steel, scaffolding, and moving plant add multipath that raises interference. Frequency reuse assigns identical channels to separated cells so each work zone stays connected while conserving spectrum. A reuse plan supports safer lifts, clearer dispatch, and steadier telemetry.
Cluster size N splits the total channel pool into N groups, giving a reuse factor of 1/N. Smaller N increases channels per cell but tightens spacing between co-channel neighbors. Hex geometry uses Q = D/R = √(3N), so higher N increases reuse distance D for a fixed cell radius R. Use the calculator to balance capacity against your required C/I.
Directional sectors reduce the number of dominant co-channel interferers. Planning approximations commonly use i0 ≈ 6 for omni, ≈ 2 for tri-sector, and ≈ 1 for six-sector layouts. Place sectors to cover active faces, laydown yards, and offices, and limit overshoot beyond the perimeter with downtilt or lower mounts. Sectorization can often meet targets without increasing N.
Effective spectrum is total bandwidth minus guard band percentage. Guard bands protect adjacent services and reduce spillover when multiple contractors bring equipment. Channel bandwidth controls how many channels fit; narrower spacing increases count but may reduce throughput per channel. For mixed services, reserve blocks for safety voice, low-latency control, and best-effort data, then document the channel map on drawings.
Treat results as planning-grade. Confirm with a site walk, antenna heights, and realistic path-loss exponent n for your environment. Check measured RSSI and SINR near cranes and inside temporary structures, then rerun scenarios as the site evolves. If estimated C/I falls short, increase N, add sectors, reduce radius with more small cells, or schedule transmissions to lower simultaneous reuse during peaks. Export CSV and PDF outputs to include in commissioning notes, coordination meetings, and change-control records.
It is the practice of using the same channel set in different areas, separated by sufficient distance or directionality so interference stays within an acceptable C/I target.
Start with your required C/I and an estimated path-loss exponent. Test several N values and choose the smallest N that meets the target while keeping enough channels per cell for peak demand.
Guard bands reserve edge spectrum to limit adjacent-channel spillover, reduce inter-system conflicts, and provide tolerance when different vendors or contractors operate nearby equipment.
Sectors narrow antenna coverage, lowering the count of dominant co-channel interferers. That often increases C/I without sacrificing as much capacity as increasing N.
n describes how quickly signal power decays with distance in your environment. Open areas may be near 2–3, while dense steel and clutter can push values toward 4 or higher.
Increase N, add sectors, reduce cell radius by deploying more cells, adjust antenna placement, or apply scheduling and power control. Then retest until the estimated C/I meets the target.
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.