UK Mobile Phones (uk.telecom.mobile) Mobile telephone equipment and networks.

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Old June 3rd 18, 09:26 PM posted to uk.telecom.mobile
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Default Airwave reaches parts other networks cannot reach...

In article , Martin Brown <'''newspam'''@n
ezumi.demon.co.uk scribeth thus
On 30/05/2018 19:43, tim... wrote:


"Tweed" wrote in message
news
http://www.theregister.co.uk/2018/05...utdown_of_emer

gency_services_4g_programme/


When will these government people learn

My guess is that they were far too ambitious with the roll out wanting
all of the new features to be 100% available on day one.


Probably, but it was the requirement to rescind some of the laws of
physics pertaining to the propagation of electromagnetic waves that will
have been their undoing. That and the usual list of "bad planning" x10.

Instead of what a normal person would do, start with the basic features
and incrementally add on the extra bits piecemeal

I mean, how hard is it going to be to provide a basic voice service.


If you choose the right frequency as the old system did it is easy but
if you insist on insane data rates and absolute availability under all
circumstances including national grid failure then it gets expensive.

It's a publically available network FFS.* I can go and buy a phone to do
that now!


Not away from the big cities you can't. There are dead spots for DAB
radio on the A1 even today and that is supposed to be "fully working".


And 4G mobile Telcos;!..
--
Tony Sayer


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Old June 3rd 18, 09:29 PM posted to uk.telecom.mobile
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Default Airwave reaches parts other networks cannot reach...


"it's free to make calls within your personal network." (and it has single
key "push to talk" back to base [1])

but with terminals costing upwards of 1000 pounds and networks fees of 100s
per month that's a pretty pyrrhic advantage when (for customers who don't
need the network security) you can go and buy a mobile phone for 50 quid a
pop, with call packages at 20 quid a month.

so that what's all the potential non-emergency-services customers went and
did.


tim

[1] The last time that I worked on a mobile (3G) handset there was talk of
the networks adding PTT to mobiles (and hence us having to have a PTT button
on the phone). It came to nothing as there is little end-customer demand
for such a feature.



PTT over cellular still is problematic in group calls where the
reception of some on the group may not be as good as it ought and all
that capacity being taken up, sometimes the group can be over a 100 odd
mobiles...
--
Tony Sayer


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Old June 4th 18, 09:00 AM posted to uk.telecom.mobile
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Default Airwave reaches parts other networks cannot reach...

On 03/06/2018 22:29, tony sayer wrote:
PTT over cellular still is problematic in group calls where the
reception of some on the group may not be as good as it ought and all
that capacity being taken up, sometimes the group can be over a 100 odd
mobiles...


Wasn't that found to be a weakness of Airwave when police were brought
in from all over the UK for big world leaders conference at
Gleneagles(?) and Rent-a-Mob turned out in force. Many of the police
left their radios set to the talkgroup back in the home area. I think
they had to tell them on the buses moving plod around to turn off all
radios except for the person in charge.
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Old June 12th 18, 06:21 PM posted to uk.telecom.mobile
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Default Airwave reaches parts other networks cannot reach...


"MB" wrote in message
news
On 31/05/2018 11:16, Tweed wrote:
Tetra does things that the standard 4G network doesn't. Eg local
handset
calling without a base station, using vehicle sets as a handset
repeater,
group calls involving very many handsets. They don't seemed to have
cracked
this on the EE network yet.


I thought that those modes were not implemented in Airwave?

[snip]

Indeed you are correct Martin, Airwave handsets are basically secure
two-way radios with secure telephone capability and a few other clever
bits.

On the other hand TetraPol had those functions as standard. If a site
lost contact with the node it would go to local talkthrough for all
users, and you could register and deregister on it. If a vehicle was
out of range of a site but there was a vehicle nearby in range it
could repeat through automatically, and quite a few other clever
things that were/are useful with such as panic buttons and hands free.

One force not far from both of us but not our local went from six UHF
analogue QS systems with over twenty sites to cover their main city to
three on Airwave. The Airwave sites kept loosing contact with the node
in Rugby (or was it Oswestry?) so they were reprogrammed to fall back
to T/T. However if you were registered on a site that lost contact you
could not register onto another site until you completely lost contact
with the site you were registered on - perhaps 40 miles away! The
solution was to put a fixed mobile at each site connected to the HQ
control system by landline so that if the site lost the node they
could still contact the users on that site.

When Airwave was being conceived there was much discussion about all
eggs in one basket and too much coverage. For instance when would a
copper on the Newcastle Metro ever need to talk to another copper
standing on Bournemouth Pier - but he could if he wanted to (OK
perhaps with the exceptions of MoDPlod, UKAEA Constab (as it then was)
and BTP.) It was often thought in the industry that a better solution
would be for each county to get its own infrastructure across all
emergency services and link the sites together with routers (which
essentially is what the nodes do.) Then if a router failed you just
toddled along to Expensive World and bought a new one. Of course that
was far far to easy.


Woody

harrogate three at ntlworld dot com




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