Distance from Shore
Distance to the donor base station, line of sight, operating frequency and base-station direction determine the usable signal available at the platform.
OFFSHORE 4G 5G COVERAGE • OIL & GAS
Reliable Mobile Coverage on Offshore Platforms Is an RF Engineering Project
Offshore 4G 5G coverage on oil & gas platforms is not created simply by selecting a repeater. It requires measuring the available mobile network environment, designing the donor link, planning deck-by-deck RF distribution, calculating cable and splitter losses, and continuously monitoring the system.
The Stella Doradus approach addresses the complete RF chain, from site survey and StellaPlanner design to Titan iRepeater and LineAmp-based distribution, followed by remote monitoring with StellaControl.
OFFSHORE RF ENVIRONMENT
Why Is Offshore 4G 5G Coverage Challenging?
In offshore 4G 5G coverage design, a strong outdoor mobile signal does not mean the same coverage will be available inside cabins and enclosed areas. The physical structure of the platform and the RF environment must be evaluated together.
Heavy Steel Structure
Steel walls, decks, fire doors and machinery spaces can significantly attenuate RF signals.
Multiple Decks and Cabins
Accommodation areas, control rooms, corridors and operational spaces should be treated as separate coverage zones with different RF conditions.
Multiple Operators and Bands
Repeater bands should not be selected before the target operators, active 4G/5G bands and actual serving cells at the site have been measured.
STELLA DORADUS ENGINEERING WORKFLOW
A Six-Stage Approach from Survey to Continuous Monitoring
01
Site Survey
Measurement of operators, cells, bands and outdoor RF levels
02
Donor RF Analysis
Base-station direction, antenna location, RSRP/RSRQ/SINR and cable losses
03
StellaPlanner
Antenna placement, RF losses and BOM based on deck plans
04
RF Distribution
Balanced distribution using Titan, splitters, LineAmps and service antennas
05
Commissioning
On-site verification of coverage, gain, isolation and target areas
06
Remote Monitoring
StellaControl, alarms, performance history and PortSense monitoring
DONOR RF DESIGN
First Step: Measure the Mobile Network Environment
The donor antenna is installed at a suitable high point on the platform and optimized toward the base stations of the required mobile operators. Signal level alone is not sufficient; signal quality and serving-cell information are also evaluated.
- Identify operators and serving cells
- Verify 4G/5G bands and frequencies
- Measure RSRP, RSRQ and SINR
- Determine donor antenna direction and gain
- Calculate donor cable length and RF losses
- Verify RF isolation between donor and service antennas
IN-PLATFORM RF DISTRIBUTION
From Donor Signal to Deck-by-Deck Mobile Coverage
In offshore 4G 5G coverage distribution, the expected RF level is calculated for every deck and critical indoor area. The objective is not maximum gain, but balanced, stable and manageable coverage across the service antennas.
Available Mobile Network
Target operators and active 4G/5G bands
→
Donor Antenna
Direction, gain and low-loss RF cable
→
Titan iRepeater
Controlled RF amplification on selected bands
→
Splitter / LineAmp / Service Antennas
Deck 1
Deck 2
Deck 3
Control Room
Accommodation
Operational Area
MODULAR RF DISTRIBUTION
Scalable Coverage with Titan iRepeater and LineAmp
As an offshore 4G 5G coverage system grows, it is not limited to a single service antenna. The RF distribution network can be extended to different decks and areas using splitters and, where required, LineAmps. Cable loss, splitter loss and the target RF level at each service antenna are calculated for every distribution branch.
- Select the model according to the required multi-band 4G/5G coverage
- Use LineAmp for controlled gain on long distribution runs
- Provide deck- and room-level coverage with multiple indoor antennas
- Automatic gain and oscillation-control functions
- Monitor antennas and the RF connection chain with PortSense
LINK BUDGET AND RF BALANCE
The Entire RF Chain Is Calculated, Not Just Repeater Gain
Donor Side
Donor antenna gain, cable loss, outdoor RF level and usable signal quality are evaluated together.
Distribution Side
Splitter, cable and LineAmp losses are calculated to achieve the target RF level at each service antenna.
RF Isolation
Adequate isolation between donor and service antennas helps prevent oscillation and unnecessary gain reduction.
SURVEY AND PLANNING TOOLS
Measure with SHARK, Design with StellaPlanner
SHARK Site Survey
SHARK is used to measure outdoor cellular RF conditions, identify available operators and bands, and collect the field data required for donor-system design.
StellaPlanner
StellaPlanner is used to plan repeater, cable and service-antenna placement on deck and building plans, evaluate RF losses and prepare the project BOM.
CONTINUOUS RELIABILITY
The Offshore System Remains Monitored After Installation
For offshore 4G 5G coverage systems, site visits can be costly and time-consuming. Remote monitoring of the repeater system is therefore an important part of operational reliability.
StellaControl RMS
Repeater performance, signal levels, settings, alerts and historical status information can be monitored remotely over the internet.
Cell Scanning
Helps periodically check the available cellular networks and base stations in the surrounding RF environment.
PortSense
Helps monitor the status of antennas, cables and RF connections and provides early warning when a connection problem occurs.
GENERAL EXAMPLE FROM A REAL-WORLD DEPLOYMENT
Offshore Oil & Gas Rig
In a project carried out by Stella Doradus, the mobile signal received through an external donor antenna on a steel offshore platform located far from shore was distributed across multiple decks.
20 kmApproximate distance from shore
5 deckTarget coverage structure
4 LineAmpLong RF distribution run
19 antennasIndoor service antennas
These Values Are Not a Recipe — They Illustrate the Engineering Approach
Every platform has different distances from shore, operators, active frequencies, outdoor signal levels, deck plans and cable routes. The number of repeaters, LineAmps and service antennas must therefore be recalculated for each project.
The value of the case study is not in a fixed quantity of products, but in the engineering method: measuring the external donor signal, receiving it with a directional antenna, supporting long RF distribution runs with LineAmps and creating coverage deck by deck.
The same architecture is not copied directly to other offshore platforms; it is resized through a site survey and RF link budget. You can review Stella Doradus'
offshore oil rig solution approach
on the manufacturer's website.
Hazardous Area and Offshore Installation Requirements
On offshore oil & gas platforms, equipment location, Zone classification, power infrastructure and cable routing must be evaluated according to the platform's hazardous-area requirements. The fact that a product has been used in an offshore project does not automatically mean that it is certified for every Zone.
Placement of the repeater and other active equipment in safe/non-hazardous areas, as well as external antennas, cable penetrations, bonding/grounding, surge/lightning protection and marine-environment mechanical mounting, must be verified on a project-specific basis.
PROJECT INPUTS
Information Required to Start an Offshore Coverage Design
Platform LocationDistance from shore and approximate operating area
Deck PlansDecks, cabins and critical areas to be covered
Mobile OperatorsTarget mobile operators and service requirements
Site MeasurementsRSRP, RSRQ, SINR, cell and frequency information
Cable RoutingApproximate RF cable lengths and routing points
Zone ClassificationSafe and restricted areas for active equipment
Start the Offshore 4G 5G Coverage Design with Field Data
BağLAN supports the technical design and sizing of Stella Doradus solutions, from donor RF analysis and deck-by-deck coverage to remote monitoring.