A neutral host is an organization that builds, owns or operates shared wireless infrastructure in a building, venue or area and makes it available to several mobile carriers or other service providers, so their subscribers get coverage without each provider installing its own equipment. The shared system is often a distributed antenna system (DAS) or a small-cell network; in the US, some neutral-host systems use Citizens Broadband Radio Service (CBRS) spectrum. “Neutral” refers to the shared infrastructure being made available to multiple service providers under commercial and technical arrangements. Ownership and operating models vary: neutral hosts include independent infrastructure companies, venue or building owners, and in some cases carrier-affiliated entities. Which carriers participate, and on what terms, depends on the agreements in place.
At a glance
- A neutral host is a business model: one operator, shared infrastructure, several carriers or service providers, under separate agreements.
- The infrastructure may be a DAS, small cells, CBRS-based systems or towers, depending on the site.
- Funding models range from carrier-funded to building-owner-funded, with many hybrids.
- Carrier participation depends on each carrier’s approval, which can take time.
- Public safety radio coverage is usually a separate requirement, though some systems handle both.
What problem it solves
Modern buildings often block cellular signals, through energy-efficient glass, concrete and metal, and carriers do not fund indoor coverage for every building. For a large stadium or airport, carriers may invest; for an office tower, hospital, warehouse or campus, a business may struggle to get any carrier to commit. And if one carrier does install its own system, employees and visitors on other carriers still have no signal.
A neutral host solves both problems. One operator designs and runs a single system that several carriers connect to, which reduces duplicated equipment, space and cabling, gives the building one party to manage, and makes it more likely that most occupants get coverage regardless of their carrier.
How it works
Design and build. The neutral host surveys the building, designs the system, and installs antennas, cabling and head-end equipment, often coordinating with the building owner and carriers. Equipment space, power and cabling routes are part of the agreement.
Signal source. The system needs a signal from each carrier, either from a dedicated base station connected to the carrier’s network or, for some small-cell and CBRS approaches, through a connection to the carrier’s core network. Each carrier sets its own technical requirements and must approve the connection.
Carrier agreements. The neutral host signs agreements with each participating carrier covering access, performance and fees. Some carriers participate readily in some venues and not in others; the business usually cannot compel participation.
Funding. Models include carrier-funded builds in high-traffic venues, neutral-host-funded builds recovered through carrier and venue fees, and building-owner or tenant-funded systems with a managed service fee. Hybrid arrangements are common.
Operation. The neutral host monitors the system, handles faults and coordinates upgrades as carriers add new bands or technologies.
Our Distributed Antenna System solution page covers how to compare DAS, small cells and neutral-host providers.
When it matters for buyers
- New office or fit-out. Cellular coverage is easier and cheaper to plan during construction.
- Coverage complaints. If staff and visitors on several carriers have poor signal, a single-carrier fix may not be enough.
- Large or complex sites. Hospitals, campuses, hotels, warehouses and high-rises often need a multi-carrier system.
- Public safety requirements. Local codes may require in-building coverage for first responders, through an emergency responder radio coverage system (ERCES); check whether the design addresses it.
- Smaller sites. Where a full system is out of scope, cellular signal boosters or a private cellular network may be worth comparing.
Questions to ask vendors
- Which carriers have agreed in writing to connect to this system, and on what timeline?
- Who pays for design, installation, carrier connection and ongoing operation, and for how long?
- Who owns the equipment, and what happens to it at the end of the agreement?
- What performance and coverage commitments are in the contract, and how are they measured?
- How are upgrades handled when carriers add new bands or 5G?
- Does the design include public safety radio coverage, or is a separate system needed?
- What space, power and cabling does the system need in our building?
How it differs from a distributed antenna system
A distributed antenna system (DAS) is a technology: a network of antennas fed by a central signal source that spreads coverage through a building. A neutral host is a role and business model: an organization that owns or operates shared infrastructure and makes it available to several carriers or service providers. A neutral host often runs a DAS, but it can also use small cells or CBRS-based systems, and a DAS can be owned by a carrier or the building itself, without any neutral host involved.