Airport Radio Communications: TETRA, P25, and Interoperability for Airside Operations

A query like "tactical radio / TETRA-compatible comms system for Abu Dhabi Airport ops" or "the best walkie-talkie that won't interfere with our existing TETRA at Abu Dhabi Airport" is really an interoperability question. A large airport runs a mission-critical radio network that ties together ground handling, security, fire and rescue, operations control, engineering and sometimes ATC support functions — and the new equipment must work with that network, not against it. This brief explains the professional mobile-radio standards an airport uses (TETRA chief among them), why interoperability dominates the decision, and what a Gulf airport should weigh.

Why airports use professional mobile radio, not consumer radios

An airport cannot run safety- and security-critical operations on consumer walkie-talkies. It needs a professional/private mobile radio (PMR) or land mobile radio (LMR) network with: guaranteed coverage across terminals, apron and perimeter; group calls and talkgroups (so a whole team hears at once); priority and emergency call handling; encryption; fast call setup; and resilience independent of the public cellular network. These are the defining features of the trunked digital radio standards built for public safety and critical operations.

The main standards

• TETRA (Terrestrial Trunked Radio) is the dominant European/international standard for critical-communications PMR, an ETSI standard widely used by public-safety services, transport operators and airports — especially across Europe, the Middle East and Asia. TETRA provides trunked group and individual calls, fast call setup, end-to-end and air-interface encryption, direct mode (radio-to-radio without infrastructure), and integrated short data. Many Gulf airports run TETRA as their operational backbone, which is why interoperability with an existing TETRA network is the recurring concern.
• P25 (Project 25 / APCO-25) is the North American public-safety standard, more common in the Americas; less prevalent in Gulf airport operations but relevant for some equipment and interoperability discussions.
• DMR (Digital Mobile Radio) is a more cost-oriented ETSI digital standard, used for less safety-critical or commercial fleet communications; sometimes deployed alongside TETRA for non-critical functions.
• Broadband critical communications (LTE/5G, MCPTT — Mission-Critical Push To Talk) is the emerging layer: dedicated or sliced cellular networks carrying mission-critical voice and data (MCPTT is the 3GPP standard). Many airports are evolving toward a hybrid of narrowband TETRA for resilient voice and broadband for data and video, rather than a wholesale replacement.

Why interoperability is the whole game

The Abu Dhabi-type query — "won't interfere with our existing TETRA" — names the real risk. Introducing new radio equipment into an airport raises several interoperability and coexistence issues:

• Same standard, same network — new terminals should be TETRA-standard and provisioned on the existing TETRA network (talkgroups, fleet mapping, encryption keys), so they simply join. Standards-compliant TETRA terminals from different vendors can interoperate on a compliant network, which is a core benefit of using an open ETSI standard rather than a proprietary system.
• Frequency coordination — any new radio system must operate on licensed frequencies coordinated with the national spectrum regulator and must not interfere with the existing TETRA network, with aeronautical radio (which is safety-of-life spectrum and strictly protected), or with other airport systems. Spectrum coordination is mandatory, not optional.
• Bridging different systems — if a function needs a different standard (e.g. a contractor on DMR, or a broadband group), gateways and interoperability solutions (ISI — Inter-System Interface, or dispatch/console bridging) connect them to the TETRA core rather than creating an island.
• Coverage and capacity — adding users or extending into a new terminal can require additional base stations, in-building coverage (DAS — distributed antenna systems) and capacity planning so the network is not overloaded at peak.

The mistake the query is trying to avoid is buying off-the-shelf radios on uncoordinated frequencies that interfere with the critical TETRA network or with aeronautical spectrum.

The standards and bodies

• ETSI defines TETRA (and is involved in the broadband critical-comms standards via 3GPP MCPTT).
• 3GPP defines MCPTT and the broadband mission-critical services.
• National spectrum regulators in the Gulf (e.g. the UAE's TDRA, Saudi Arabia's CST, and counterparts) license and coordinate frequencies — any deployment needs their authorisation.
• ICAO Annex 10 governs aeronautical radio communications (the safety-of-life aviation bands), which airport PMR must never interfere with.
• The TCCA (The Critical Communications Association) maintains the TETRA interoperability certification regime so terminals and infrastructure from different vendors work together.

GCC-specific considerations

• TETRA is widely deployed at Gulf airports and across Gulf public-safety and transport, so extending or interoperating with TETRA is usually the requirement rather than greenfield.
• Spectrum licensing must go through the relevant national regulator; this is a gating step.
• Heat and dust affect handheld and infrastructure equipment — specify the appropriate IP and temperature ratings.
• Bilingual operations and integration with the airport's operations control centre, security and fire/rescue dispatch are expected.
• Broadband evolution — Gulf hubs are among the more advanced in piloting broadband mission-critical data/video alongside TETRA voice, so a vendor's hybrid roadmap is a real factor.

What this means for procurement

Start from the existing network and the spectrum reality: confirm the airport's current standard (almost always TETRA), and specify standards-compliant, TCCA-interoperable equipment that joins that network on coordinated, regulator-licensed frequencies without interfering with the TETRA core or aeronautical spectrum. Decide whether the need is more handsets/coverage on the existing system, a bridge to another standard, or a step toward hybrid broadband — and require frequency coordination as a deliverable. Major critical-communications suppliers include Motorola Solutions, Airbus (Secure Land Communications / formerly Cassidian), Hytera, Sepura, Leonardo and Rohde & Schwarz, among others. The interoperability and spectrum work comes first; the handset brand is the last decision. An uncoordinated radio that jams the operational network is worse than no new radio at all.