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Public Safety Programme
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Mission-critical
Communications to
Rely on
Communication is a key
factor in an emergency
situation, whether small
incidents such as a man
overboard or major natural
disasters.
TETRA covers the mobile-to-network interface architecture of
Terrestrial Trunked Radio (TETRA) is the leading technology a critical communications application operating over a
choice for critical communications users, with a projected 5 broadband Internet Protocol (IP) interface. Publication of
million terminals in use by 2020. The TETRA standard serves the new version is scheduled for mid-2018. We have also
a variety of professional markets – public safety, transport, begun to look at extending our work to interfaces to 5G. In
industry and commercial users – which rely on TETRA’s high addition, work is ongoing on the detailed specification for
performance group and individual voice communications the mobile-to-infrastructure interface. We have begun new
services and its wide range of data services, with one radio work specifying the means of encapsulating TETRA speech
terminal able to provide many services. coding, packet format and rate and end-to-end encryption
synchronisation for use in 3GPP Mission-Critical Push-To-Talk
Although use of TETRA for public safety applications, the (MCPTT) over LTE systems for the purpose of interworking
military and utilities continues to grow, the majority of the with TETRA.
work of our TETRA and Critical Communications Evolution
committee (TC TCCE) is driven by the requirements of Public We continue to work very closely with the Critical
Protection and Disaster Relief (PPDR) and other mission- Communications Broadband group of the TETRA and Critical
critical services. Communications Association in relation to a revision of the
TR on the user requirements specification on interworking
The ‘Future Vision’ for TETRA is an evolution towards a fully between the Critical Communications Application and TETRA
integrated and seamless Information and Communications and on migration of services from TETRA to broadband (LTE).
Technologies solution, providing narrowband/wideband/
broadband wireless communications for mission-critical
and business-critical Professional Mobile Radio (PMR)
applications. Broadband will be a crucial factor in this, as
it can supply the high data speeds required for various key
applications including, for example, streaming video from the
scene of an incident.
In the medium term, most users see a hybrid of TETRA
and broadband networks as the way forward for critical
communications, so we are also looking at methods of
integrating TETRA into broadband solutions, and enabling
migration from TETRA to (future) broadband. To minimise the
work required and to optimise the standardisation process,
the plan is to enhance existing standards for technologies,
such as LTE™ and 5G, by the development of interfaces
and applications, to make them suitable for mission-critical
applications. By the end of 2017, we expect to publish a
Technical Report (TR) outlining the key issues and solutions
for TETRA to broadband interworking which will be followed
by a Technical Specification (TS) detailing the required
architecture.

We are also developing an architecture encompassing a
range of application layer interfaces to LTE, defined in a set
of TSs. In response to feedback from the Third Generation
Partnership Project (3GPP™), we are revising the TS which

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