Infrastructure

Infrastructure refers to the physical equipment, networkA Network is a connected system of radios, equipment and infrastructure that allows users to communicate across a defined area. Radio networks can range from simple radio-to-radio systems to large multi-site networks. connections, sites and supporting systems that are required to operate a communication system.

In professional two-way radio, radio infrastructure can include equipment such as Repeaters, antennas, base stations, control systems, network connections, powerAn antenna transmits and receives radio-frequency signals, allowing a two-way radio to communicate. Antenna type, frequency, height and location can all affect radio performance and coverage. supplies and other components that support communication between radio users.

A basic radio systemA Radio System is a complete communication solution comprising two-way radios and, where required, equipment such as repeaters, antennas, base stations, mobile radios and network infrastructure. may operate without additional infrastructure, with radios communicating directly with one another. Larger systems often require infrastructure to provide greater coverageRadio Coverage is the geographical area in which a two-way radio system can provide reliable communication. Coverage depends on the radios, antennas, frequency, terrain, buildings and system infrastructure., additional functionality or communication between multiple locations.

What is radio infrastructure?

Radio infrastructure is the equipment and supporting systems that sit behind or around the individual two-way radios.

For example:

Handheld radios → RepeaterA Repeater receives a two-way radio transmission and retransmits it, usually from an elevated location, to extend the coverage and reliability of a radio communication system. → AntennaAn antenna transmits and receives radio-frequency signals, allowing a two-way radio to communicate. Antenna type, frequency, height and location can all affect radio performance and coverage. → Network → Control system

The exact arrangement depends on the size and requirements of the radio system.

Why is radio infrastructure important?

Infrastructure can allow a radio system to provide:

• Greater coverage
• Communication across larger sites
• Multi-site communication
• Centralised control
• GPS and location services
• Emergency communications
• Call recordingCall Recording is a two-way radio feature or system function that captures and stores radio communications for later playback, review, incident investigation or record keeping.
• Dispatch
• Network connectivity
• Improved resilience

The amount of infrastructure required depends on the environment, number of users and required coverage.

Radio infrastructure and direct radio communication

The simplest radio system consists of two or more radios communicating directly with one another.

This is sometimes referred to as simplexSimplex is a method of two-way radio communication where radios transmit and receive on the same frequency, communicating directly without a repeater. operation.

Radio A → Radio B

No repeater or other network infrastructure is required.

This can be suitable for smaller operations where the required coverage can be achieved directly between the radios.

Radio infrastructure and repeaters

A Repeater is one of the most common components of professional radio infrastructure.

A repeater receives a transmissionTransmission is the process of sending voice, data or signalling from a radio using a radio-frequency signal to another radio, repeater or communication system. from a radio and retransmits it, allowing users to communicate over a greater area.

A simplified system might be:

Radio → Repeater → Radio

The repeater is normally positioned where it can provide effective coverage across the required operating area.

Repeater sites

A repeater site can contain more than just the repeater itself.

Depending on the system, a site may include:

• Repeater equipment
• Antenna
• Mast or tower
• Duplexer
• Filters
• Power supply
• Battery backup
• Network connection
• Cabinet or equipment shelter

The site must be designed to suit the radio frequencyAn antenna transmits and receives radio-frequency signals, allowing a two-way radio to communicate. Antenna type, frequency, height and location can all affect radio performance and coverage., coverage requirements and environment.

Infrastructure and antennas

The Antenna is a critical part of radio infrastructure.

A well-positioned antenna can have a significant effect on the coverage achieved by a radio system.

For repeater sites, antenna height and location are particularly important because increasing the effective height can improve the radio horizon.

The antenna system may also include:

• Coaxial cable
• ConnectorsAn antenna transmits and receives radio-frequency signals, allowing a two-way radio to communicate. Antenna type, frequency, height and location can all affect radio performance and coverage.
• Lightning protection
• Filters
• Duplexers
• Mounting equipment

Infrastructure and base stations

A Base StationA base station is a fixed two-way radio installed at a permanent location, allowing an operator to communicate with handheld or mobile radios across a site or operating area. is a fixed radio installation that can provide a central communication point.

A base station may be installed in:

• Control rooms
• Security offices
• Site offices
• Dispatch centres
• Operations rooms

It can communicate with mobile or handheld radios within its coverage area.

Infrastructure and mobile radio systems

Vehicle-mounted radios can form part of a wider radio infrastructure.

A mobile radioA Mobile Radio is a two-way radio designed to be installed in a vehicle. It normally uses the vehicle's power supply and an external antenna to provide reliable communication while travelling or working in the field. can provide greater available transmit power and use an external vehicle-mounted antenna.

In some systems, vehicles can also act as communication points or mobile infrastructure.

Infrastructure and control rooms

A control room can form an important part of radio infrastructure.

It may contain:

• Base stations
• Dispatch consoles
• Radio control equipment
• Recording systems
• Network equipment
• Monitoring systems
• Emergency communication facilities

A control room allows operators to coordinate radio users and manage communications centrally.

Infrastructure and dispatch

Dispatch systems allow authorised operators to communicate with and manage radio users.

Depending on the system, dispatch infrastructure can provide:

• Individual calls
• Group calls
• Emergency alerts
• GPS location
• Call recording
• User management
• Communication monitoring

Dispatch infrastructure can be installed locally or provided through a network or cloud platform.

Infrastructure and Cloud Dispatch

Cloud DispatchCloud Dispatch is a cloud-based radio management and communication system that allows authorised dispatchers to communicate with, monitor and manage two-way radio users through an internet-connected platform. moves some dispatch functionality into a cloud-based environment.

Radio infrastructure can connect to the cloud through an IP network, allowing authorised operators to communicate with radio users remotely.

This can be particularly useful for organisations operating across multiple locations.

Infrastructure and IP networks

Modern radio systems can use IP (Internet Protocol) networks to connect radio infrastructure.

For example:

Repeater → IP Network → Repeater

This can link geographically separated radio sites.

IP networking can also connect radio systems to:

• Dispatch platforms
• Cloud managementCloud Management uses an online platform to remotely manage and monitor compatible two-way radios, users, devices and communication settings from a central location.
• Call recording
• GPS systems
• Other radio networks

Infrastructure and gateways

A Gateway connects different communication systems or networks.

For example, a radio gateway can connect:

Radio system → IP network → Other communication system

Gateways are particularly useful in Hybrid CommunicationHybrid Communication combines two or more communication technologies, such as two-way radio, DMR, cellular, Wi-Fi or IP networks, allowing different systems or users to communicate through a common platform. environments where different radio or network technologies need to communicate.

Infrastructure and hotspots

A HotspotA radio Hotspot connects compatible two-way radio equipment to another communication network, such as an IP or internet-based network, allowing radio users to communicate beyond their normal local coverage. can provide a network connection between compatible radio equipment and an IP-based communication network.

Depending on the radio technology, this can allow communications to travel beyond the local RF coverage.

A hotspot is therefore one possible component of network-connected radio infrastructure.

Infrastructure and multi-site radio systems

Organisations operating across multiple locations may require infrastructure at each site.

A multi-site system could look like:

Site A Repeater → IP Network → Site B Repeater → Site C Repeater

This can allow radio users across different sites to communicate through a common system.

Infrastructure and wide-area coverage

Infrastructure can be used to create Wide-Area Radio systems.

Multiple repeater sites can be linked together to provide communication across a large geographical area.

The number and location of sites depend on:

• Geography
• Terrain
• Building density
• Required coverage
• FrequencyFrequency is the number of cycles a radio wave completes each second, measured in Hertz. In two-way radio, frequency determines where a transmission operates within the radio spectrum.
• Antenna height
• User locations

Infrastructure and coverage

Radio infrastructure plays a major role in determining system Coverage.

Coverage can be affected by:

• Repeater location
• Antenna height
• Antenna type
• Frequency
• Transmit power
• Terrain
• BuildingsAn antenna transmits and receives radio-frequency signals, allowing a two-way radio to communicate. Antenna type, frequency, height and location can all affect radio performance and coverage.
• Vegetation
• InterferenceRadio interference occurs when unwanted radio-frequency signals or electrical noise disrupt two-way radio communications, causing distorted audio, broken transmissions, reduced coverage or loss of communication.

A coverage survey can help determine where infrastructure is required.

Infrastructure and dead spots

A Dead SpotA Dead Spot is an area where two-way radio communication is weak, unreliable or unavailable. Dead spots can be caused by buildings, terrain, distance, interference or inadequate radio coverage. is an area where radio communication is unavailable or unreliable.

Infrastructure can sometimes be used to reduce dead spots.

Possible solutions include:

• Repositioning an antenna
• Installing a repeater
• Increasing antenna height
• Adding another radio site
• Improving the antenna system
• Using network-connected communications

The appropriate solution depends on the cause of the coverage problem.

Infrastructure and frequency

Radio infrastructure must be designed around the frequencies being used.

Frequency affects:

• Propagation
• Antenna requirements
• Coverage
• Building penetration
• Equipment design
• Licensing

The infrastructure must be compatible with the radio frequency and applicable regulatory requirements.

Infrastructure and duplex operation

A repeater normally uses different transmit and receive frequencies so that it can receive and retransmit at the same time.

A Duplexer can allow a repeater to use a single antenna for both transmit and receive functions while providing the necessary isolation between the signals.

Duplexers and filters can therefore form important parts of repeater infrastructure.

Infrastructure and power

Radio infrastructure requires a reliable power supply.

A repeater site may require power for:

• Repeater equipment
• Network equipment
• Cooling
• Control equipment
• Ancillary systems

Where communication is operationally critical, backup batteries or other power-resilience measures may be used.

Infrastructure and failover

FailoverFailover allows a two-way radio system to switch to backup equipment, infrastructure or communication routes when the primary system fails, helping maintain communications. provides an alternative communication path or system when the primary system becomes unavailable.

Infrastructure can be designed with redundancy such as:

• Backup power
• Redundant network connections
• Multiple radio sites
• Backup repeaters
• Alternative communication networks

The level of redundancy should reflect the importance of the communication system.

Infrastructure and resilience

A resilient radio infrastructure is designed to continue operating when individual components fail.

For example:

Primary power → Battery backup

Primary network → Secondary network

Primary radio site → Alternative radio site

The more critical the communication requirement, the more important infrastructure resilience becomes.

Infrastructure and battery backup

Repeater sites and control systems can use battery backup to maintain operation during a power interruption.

The available backup time depends on:

• Battery capacity
• Equipment load
• Battery condition
• Environmental temperature
• System configuration

Battery backup should be tested and maintained regularly.

Infrastructure and radio recording

Call Recording infrastructure can record radio communications for later review.

A recording system may be connected to:

• Radio consoles
• Dispatch systems
• Repeaters
• Communication gateways

Recording can be particularly useful for security, transport, event control and other operational environments.

Infrastructure and GPS

Radio infrastructure can transport GPS location information from compatible radios to a central system.

For example:

GPS radio → Radio infrastructure → IP network → Dispatch platform

This can allow authorised operators to see the approximate location of radio users.

Infrastructure and Geo-Fencing

Where GPS information is available, infrastructure can support systems that use Geo-FencingGeo-Fencing uses GPS and a virtual geographical boundary to identify when a radio user or tracked device enters or leaves a defined area, triggering alerts or other actions where supported..

A central platform can compare the location of a compatible device with predefined geographical areas.

This can support functions such as entry and exit alerts where the system provides the required functionality.

Infrastructure and emergency communications

Infrastructure can provide the communication path required for emergency alerts.

For example:

Emergency ButtonAn Emergency Button is a dedicated two-way radio control that allows users to quickly send an emergency alert to a dispatcher, control room or authorised radio users. → Radio → Repeater → Network → Control Room

The actual path depends on the radio technology and system design.

Emergency functionality should be tested across the complete infrastructure rather than assumed to work automatically.

Infrastructure and encryption

Radio infrastructure can carry Encrypted communications where supported by the radio system.

However, encryptionEncryption protects two-way radio communications by converting voice or data into a secure form that can only be understood by authorised radios with the correct encryption capability and keys. requirements should be considered across the complete communication path.

When communications pass through gateways, networks or dispatch platforms, the security architecture must be designed appropriately.

Infrastructure and end-to-end encryption

End-to-End EncryptionEnd-to-End Encryption protects radio communications between authorised endpoints, keeping voice or data encrypted through the network until it reaches the intended receiving device. provides protection between the intended endpoints of a communication.

In complex radio infrastructure, it is important to establish exactly where encryption is applied.

A communication passing through a gateway or dispatch system may have different security characteristics from a direct encrypted radio-to-radio transmission.

Infrastructure and cloud management

Cloud Management allows some radio infrastructure and devices to be managed remotely.

Depending on the system, administrators may be able to manage:

• Radios
• Users
• Channels
• Talkgroups
• Sites
• Configuration
• GPS information
• System status

The exact capabilities depend on the equipment and software.

Infrastructure and hybrid communication

Hybrid Communication can combine radio infrastructure with other communication networks.

For example:

DMR radio → Repeater → IP network → Cloud platform → Mobile device

This can allow users on different communication technologies to participate in a common communication system.

Infrastructure and interoperability

InteroperabilityInteroperability is the ability of different communication systems, devices or organisations to work together and exchange information. In two-way radio, it can connect different radio networks, technologies or users through compatible systems or gateways. allows different communication systems to work together.

Infrastructure such as gateways, network connections and dispatch platforms can provide the interfaces needed to connect otherwise separate systems.

Compatibility must be confirmed for the specific technologies involved.

Infrastructure and DMR

Digital Mobile Radio (DMR)Digital Mobile Radio (DMR) is an ETSI digital radio standard for professional two-way communications, supporting voice, group calling, data and other features on compatible radio systems. systems can use infrastructure such as:

• Repeaters
• Antennas
• Duplexers
• Controllers
• IP links
• Dispatch systems
• Network management platforms

The required infrastructure depends on whether the system is conventional, trunked or network-connected.

Infrastructure and trunked radio

Trunked Radio systems use central infrastructure to dynamically allocate radio channels to users.

A trunked system can use multiple radio channels efficiently by assigning available resources according to communication demand.

Trunked infrastructure is generally more complex than a simple conventional repeater system.

Infrastructure and conventional radio

A conventional radio system can be relatively simple.

For example:

Handheld radios → Repeater → Handheld radios

Additional infrastructure can then be added if greater coverage or functionality is required.

Infrastructure and PMR446

PMR446 radios are designed to operate without conventional licensed repeater infrastructure under the applicable licence-exempt conditions.

A PMR446 radio system should therefore not be treated in the same way as a professionally licensed repeater-based radio network.

The specific regulatory conditions applicable to PMR446 must be observed.

Infrastructure and licensing

Professional radio infrastructure can require appropriate frequency and radio licensing.

This may apply to:

• Repeaters
• Base stations
• Mobile radios
• Fixed radio sites

The exact licensing requirements depend on the radio service and frequency being used.

Infrastructure and site planning

A radio infrastructure project should consider the physical location of equipment.

Important factors can include:

• Antenna height
• Building access
• Power availability
• Network connectivity
• Equipment security
• Environmental conditions
• Lightning protection
• Maintenance access

Good site planning can significantly affect system performance.

Infrastructure and coverage surveys

A Coverage Survey can identify where radio infrastructure is required.

Testing can reveal:

• Strong coverage areas
• Weak coverage areas
• Dead spots
• Building penetration problems
• Terrain-related limitations
• Interference

Coverage surveys are particularly important for large sites and critical communication systems.

Infrastructure and system maintenance

Radio infrastructure requires ongoing maintenance.

This can include:

• Equipment inspection
• Battery testing
• Antenna checks
• Cable checks
• Network monitoring
• Software updates
• FirmwareFirmware is the software built into a two-way radio that controls its underlying operation, features and hardware. Manufacturers may release updates to improve performance, fix faults or add functionality. updates
• Coverage testing
• Backup system testing

Regular maintenance helps maintain system reliability.

Infrastructure and firmware

Firmware controls many of the functions of radio infrastructure equipment.

Manufacturers may release firmware updates to address:

• Bugs
• Security issues
• Compatibility
• Performance
• New features

Firmware updates should be managed carefully because infrastructure equipment must remain compatible with connected radios and software.

Infrastructure and cybersecurity

Network-connected radio infrastructure introduces cybersecurity considerations.

These can include:

• Access control
• Authentication
• Network security
• Firmware management
• Device security
• Cloud security
• Encryption
• Monitoring

The security requirements become increasingly important as radio systems become more connected to IP and cloud networks.

Infrastructure and radio hire

Temporary radio hireRadio Hire is the temporary rental of two-way radios and related communication equipment for events, projects and operational requirements, providing professional communication without purchasing the equipment. systems can include infrastructure where required.

For example, a large event may require:

Handheld radios + repeater + antenna + batteries + chargers

A suitable temporary repeater can provide greater coverage than radios operating directly with one another.

For larger or geographically separated events, network-connected infrastructure may also be considered.

Infrastructure for events

Event radio infrastructure can include:

• Repeaters
• Base stations
• Antennas
• Control-room equipment
• Charging systems
• Headsets
• Remote PTTs

The infrastructure can be configured around different operational teams.

Infrastructure for construction

Construction projects may require infrastructure to overcome the limitations caused by:

• Large buildings
• Steel structures
• Underground areas
• Terrain
• Distance

A repeater and suitable antenna installation can help provide more consistent coverage across the working area.

Infrastructure for security

Security operations can use radio infrastructure to provide coverage across:

• Buildings
• Estates
• Shopping centres
• Industrial sites
• Events
• Multiple premises

Control-room and dispatch infrastructure can also provide central coordination.

Infrastructure for transport

Transport organisations can use radio infrastructure to connect:

• Vehicles
• Depots
• Control centres
• Maintenance teams
• Operational staff

Wide-area infrastructure can allow communication across larger geographical areas.

Infrastructure for agriculture

Large farms and rural estates may require specialist radio infrastructure because of the distances involved and the presence of buildings, hills and other obstacles.

A repeater located at a suitable elevated position can potentially provide improved coverage across a large working area.

Infrastructure limitations

Radio infrastructure can improve coverage and functionality, but it introduces additional requirements.

These can include:

• Installation
• Power
• Network connectivity
• Maintenance
• Site access
• Licensing
• Equipment costs
• Technical support
• Security

Infrastructure should therefore be designed according to actual operational requirements.

Infrastructure and system design

A professional radio system should be designed as a complete system rather than simply selecting radios.

This can involve:

Users → Radios → Antennas → Repeaters → Network → Dispatch → Management

Each component contributes to the overall performance and reliability of the system.

Infrastructure and DCS

DCS can design and supply professional two-way radio infrastructure for businesses and organisations requiring reliable communication across sites, buildings or larger geographical areas.

Depending on the application, infrastructure can include repeaters, antennas, base stations, network connectivity, dispatch, GPS, recording and other supporting systems.

The appropriate infrastructure depends on the required coverage, operating environment, number of users and communication objectives.