WHICH BEARER IS BEST?
for Mission-Critical communications
Chief Technical Architect Geoff Peck compares the
performance of cellular and LMR for mission-critical
comms, and concludes it’s not as simple as it seems.
There is ongoing debate on the topic of cellular verses LMR. Indeed, nothing
seems better designed to polarise opinion. This article looks at the issue from
where it matters: the end user.
The first thing you notice about the debate is the misinformation – it’s not easy to
nail things down simply. So let’s start with some important points of comparison.
There are some clear differences, like the fact that LMR uses fewer towers,
requires higher power and has a larger effective range. These are coloured in
green. Yellow features are a bit more controversial, while those in red are hotly
disputed or frequently misunderstood. It is these that we will explain further here.
LAND MOBILE RADIO
Designed for coverage
Relatively few towers
When infrastructure fails
Avoid event overload
Designed for capacity
No group mode (until 4G 2015)
4G will have in 2015
Consumer voice quality
Cellular LTE = AES256
Rich services and applications
Subject to event overload