Digital
sponsored by T e standard’s primary goal is to specify a
digital system off ering low complexity, low cost and interoperability across manufacturers. What this means is that user organizations are not locked in to a proprietary solution.
An industry standard Simoco is a committed member of the DMR Association and continues to be heavily in- volved in both the marketing and technical working groups. One of the key objectives of the association is to provide a mechanism for ensuring that DMR equipment from diff erent manufacturers will interoperate. By removing barriers to interoperability and
supporting innovation and adoption, a single agreed standard enables end-use to buy with a greater degree of confi dence. With dPMR, such a programme does not exist and so you fi nd fewer manufacturers actually developing hardware.
How can I benefi t from DMR?
B
enefi ts of moving to DMR can be summed up as follows:
• Twice the channel capacity: with DMR, a single 12∙5 kHz channel can support two simultaneous and independent calls. This is achieved using TDMA.
• Compatibility with legacy analogue sys- tems: this will be of benefi t if (for example) you need to retain existing legacy radios or to work with external organizations which still use analogue handsets.
• Effi cient use of equipment: another advan- tage of the DMR TDMA approach is that you gain two communications channels with one repeater, one antenna and a simple duplexer.
• Greater power effi ciency: until now there have been few options for increasing talk time on portable radios on a single charge. In two-slot, TDMA however, the portable transmits for only half of the time compared with an analogue radio, thus increasing battery life.
• Ease of use and creation of data appli- cations: the end-to-end nature of DMR means that applications such as text mes- saging, GPS and telemetry can be added on to radio devices and systems with a minimum of fuss. In addition, with support for transmitting IP data over the air it is possible to develop standard applications.
• A well-established, widely backed stand- ard: as an open standard backed by a wide variety of vendors, DMR assures end- user organizations of continuity of supply through the lifespan of their network.
18 Simoco’s commitment to DMR is reinforced
by signifi cant investment in both people and facilities. Its global research and development operations have been signifi cantly expanded, increasing both head count and the size of its facilities in the UK and Australia. Simoco has al so created brand new hardware platforms for its DMR off ering, to ensure state of the art designs that are future-proof.
Applying what we know Simoco’s experience in developing and deliver- ing MPT systems dates back to the creation of the open MPT standard. T e company went on to deploy many systems around the world with its TN10X and RTSX trunked switching infrastructure. In 2005, Simoco reinforced its product credentials with the launch of the Xfi n system, a fully distributed MPT infrastructure running on an IP backbone. Xfi n was the fi rst MPT system to be deploy-
able over an IP backbone and the fi rst switch- less technology to be used in MPT. Unparalleled in its ability to continue operating during fault conditions, it is the most resilient radio system in the world. Simoco has enjoyed considerable success
with its Xfi n MPT trunked infrastructure. In- stalled systems range from single-site deploy- ments to large networks in excess of 100 sites.
Building blocks for success Simoco’s DMR infrastructure is based on the same successful design principles as Xfi n. IP connectivity allows the radio system to sit on a backbone which delivers multiple routes be- tween sites on the network, easing bandwidth and maximizing resilience. Additional sites and applications, such as dis-
patchers and voice recorders, can be incorpo- rated simply by connecting to the IP network. System support and maintenance can also be carried out remotely over the IP network; pre- viously, expensive and time-consuming site vis- its would have been required in order to man- age the network. Simoco is one of only three independent sup-
pliers manufacturing complete end-to-end DMR solutions which include a full portfolio of porta- bles, mobiles, base stations and infrastructure.
Who will adopt DMR? T e short answer is everyone. With its all-em- bracing nature, DMR is suitable for all vertical markets. Already we are already seeing strong interest from sectors such as power and utilities, oil, gas and mining, as well as from small cam- pus applications, all with diverse user require- ments. T e common requirement of all these customers is experienced equipment suppliers with strong systems integration experience across a range of applications.
Setting standards in mobile radio
S
imoco has earned a global reputation in the radio communications industry for
exceeding expectations by ensuring quality, innovation, performance and service. With a heritage dating back 70 years
to the birth of effective radio communication, Simoco continues to develop the highest quality, mission- critical, radio technologies for commercial, government, and public safety sectors worldwide. From
market leading conventional, trunked and simulcast systems to cutting- edge Tetra, P25 and DMR, Simoco has dedicated its r&d resources to the development, manufacture and integration of complete radio communications solutions: technology-agnostic, turnkey solutions tailored to meet specifi c and individual needs.
•
www.teamsimoco.com Because DMR is a tiered technology with
a common air interface, it can deliver systems that range in size and complexity. Simoco is developing DMR products in both Tier 2 and Tier 3, to provide full turn-key solutions. With its mobiles, portables, IP based distributed in- frastructure and suite of applications, Simoco will off er system solutions for all users.
From the ground up So let’s be clear: digital isn’t anything new. We all have cell phones, and some might ques- tion as to why professional radio has lagged so far behind. T e short answer is that it hasn’t. Rather, the digital standards that emerged pre- viously, such as P25 and Tetra (both of which were designed for emergency services) simply weren’t fi t for purpose in the commercial world. DMR has been designed from the ground
up for users of professional mobile radio. It ef- fi ciently increases capacity, off ers longer battery life and minimizes the use of infrastructure. T e standard also facilitates advanced function- ality and control features along with the use of business critical data applications. Finally DMR brings the clarity of digital voice. DMR is a technology with all the good
points of the mature technologies used by the emergency services, but is squarely aimed at the cost-sensitive commercial space.
LAND mobile January 2011
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