Point-to-Multipoint Planner
Plan a sectorised point-to-multipoint site: subscribers per sector, offered load, azimuth coverage and the subscriber ceiling.
About Point-to-Multipoint Planner
Oversubscription works because subscribers do not all transmit at once, so the sector only has to carry the committed rate divided by the ratio. Inverting the same relationship gives the number of subscribers a sector can sell before the committed rates no longer fit. Point-to-multipoint sites fail commercially, not technically: sell one oversubscription ratio too aggressively and the sector saturates every evening at exactly the hour customers notice.
Formula
Point-to-Multipoint
offered load per sector = (subscribers ÷ sectors) × committed rate ÷ oversubscription ratio; subscriber ceiling = sectors × sector capacity × ratio ÷ committed rate.
- ratio
- Statistical oversubscription — how many sold megabits share one delivered megabit
- azimuthCoverage
- Sectors × beamwidth, capped at a full circle
Worked example
With the default values below, Point-to-Multipoint Planner returns Subscribers per Sector of 30.00. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Sectors on the toweraccepts 1–12 sectors
- 4 sectors
- Azimuth beamwidth per sectoraccepts 10–360 degrees
- 90 degrees
- Subscribers served by the siteaccepts 1–20,000 subscribers
- 120 subscribers
- Usable capacity per sectoraccepts 1–10,000 Mbps
- 300 Mbps
- Committed rate per subscriberaccepts 0.1–1,000 Mbps
- 10 Mbps
- Oversubscription ratioaccepts 1–100 :1
- 10 :1
Results
- Subscribers per Sector
- 30.00
- Offered Load per Sector
- 30.00 Mbps
- Sector Utilisation
- 10.0%
- Subscriber Ceiling for the Site
- 1,200
- Azimuth Covered
- 360 degrees
Step by step
- 1Values used
- 2Point-to-Multipoint
- 3Subscribers per Sector= 30.00
- 4Offered Load per Sector= 30.00 Mbps
- 5Sector Utilisation= 10.0
- 6Subscriber Ceiling for the Site= 1,200
- 7Azimuth Covered= 360 degrees
Assumptions and limits
- The result is derived only from the 6 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Point-to-Multipoint calculated?
offered load per sector = (subscribers ÷ sectors) × committed rate ÷ oversubscription ratio; subscriber ceiling = sectors × sector capacity × ratio ÷ committed rate. Oversubscription works because subscribers do not all transmit at once, so the sector only has to carry the committed rate divided by the ratio. Inverting the same relationship gives the number of subscribers a sector can sell before the committed rates no longer fit.
Why does Point-to-Multipoint matter?
Point-to-multipoint sites fail commercially, not technically: sell one oversubscription ratio too aggressively and the sector saturates every evening at exactly the hour customers notice.
What values do I need to enter?
This calculator takes 6 inputs: Sectors on the tower, Azimuth beamwidth per sector, Subscribers served by the site, Usable capacity per sector, Committed rate per subscriber, Oversubscription ratio. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.