:
: : > The advantage of CDMA is that there can be a soft handoff in
progress
: > to three sites simultaneously, giving improved performance compared
to
: > using GSM in difficult high density areas.
: > the disadvantage is that 3x the resources are required. and three
: > basestations are tied up servicing one user.
: >
: > another problem with the new 3g CDMA system that tel$tra is planning
to
: > build is that the users will have to share the bandwidth with all
the
: > other users on the backbone to the base station. how can 50 users @
: > 14.4Mb/s each (theory) fit onto a limited capacity link that at the
: > moment is only 2Mb/s and may even be upgraded to a massive 8Mb/s in
the
: > future. total redesign and massive expenditure here.
: >
: > with the increase of basestations required to be in high density
metro
: > areas, the co-channel interference will be higher causing TX powers
to
: > ramp up and causing further interference, eventually causing a total
: > collapse of the network in peak usage conditions.
: >
: > there will be resistance by the community to the increased qty of
: > basestations all contributing to the electrosmog. the "not in my
: > backyard" ers will grow in number causing higher cost or failure of
the
: > rollout.
: >
: > the bottom line is that most users who need only basic voice and
slow
: > data will be forced onto the new system just because tel$tra needs
more
: > revenue and desires to keep its existing market share, wether users
want
: > to pay for new handsets and expensive content or not.
: >
: > my prediction will be that this scheme will go the same way as WAP
which
: > ended up as CRAP even after all the HYPE
: >
: > It will even contribute to the collapse of this current federal
: > government after shareholders and users alike, clamour for a
scapegoat.
: >
: >
: >
: > :
: > : : > : > Does anyone know how much longer the GSM service will be
available?
: > : >
: > : > I have just built a Silicon Chip SMS controller, and might like
to
: > : > build more.
: > : > The phone used is a Nokia 5110 which is GSM.
: > : >
: > : > Thanks,
: > : > Russell.
: > : >
: > : ----------------------
: > :
: > : The way I have heard it is that GSM towers will stay around for
: > another 5-10
: > : years as there is no requirement for their bandwidth, then
: > considerations
: > : will be made. I think the GSM handpeice sales is supposed to be
phased
: > out
: > : when 3G has been placed on every tower.
: > :
: > : If as Julien was saying, the reception is incredibly poor then
there
: > will be
: > : rather a lot of unhappy campers in this area as GSM has close
enough
: > to SFA
: > : coverage here. I remember reading something years ago in one of
the
: > papers
: > : about 3 (Hutchinson) having problems finding more sites in Sydney
for
: > their
: > : base stations due to reception problems. So if they have that much
: > trouble
: > : in a basin such as Sydney then we truly are screwed.
: > :
: > :
: >
: ---------------------
: Ok, the question then would be what is going to be made available in
the
: interum for the alledged high speed data services. And also how can
they
: expect this system to work to its full potential as the current CDMA
system
: does in the farming/remote/non metro areas?? Sounds like a typical
: government/telstra FU here, I seem to remember them saying GSM would
within
: a few years have the coverage analogue did but this never happened.
:
:
only time will prove, that in the end, this scheme actually worked. I
say it won't, and if your benchmark is: the same coverage as AMPS as
well as high speed data. then we already know the answer?
