Re: [ossig] Jaring wireless broadband? Now merger with AtlasONE???

[Dinesh Nair <dinesh@xxxxxxxxxxxx>]

On Wed, 7 Apr 2004, Imran William Smith wrote:

> Your starting to live up to that '1 man ISP' tag :)

i have a dream, i have an awesome dream....in a megalomaniacal world, i'd
buy jaring.

> If Jaring does get approval, wonder if they are eyeing the voice over IP
> market, since I think these SOMA basestations also allow voice devices
> to be plugged in, right?

iianm, jaring already has secured it's nfp license, which means it can
provide it's own infrastructure, last mile included for both voice and
data. up till now, the lack of the nfp hobbled jaring who needed to piggy
back off tm's infrastructure for the most part.

is jaring eyeing the voip market ? i'd bet on it. the purchase of soma
equipment seems to be a step in this direction, especially since now they
can bypass tm and go direct to the customer, carrying all sorts of traffic
over their _own_ links. all they need to do this is to put on some serious
thinking caps and bundle services/packages correctly. goof this up and
there wont be a second time.

this also makes them a plump and juicy takeover target, hence the recent
news on reuters about an atlasone takeover (or vice versa) of jaring.

> If each person gets 1Mbps (good broadband figure), isn't that 1MHz per
> person?

doesn't work that way. there're many ways to piggy back multiple sessions
(deemed as 1 session/subscriber) over the same frequency channels. while
you would say that 1Mhz=1Mbps, most fixed wireless broadband technology
uses many different modulation techniques from QPSK to 16QAM to 64QAM. all
of this raise the bit/Hz ratio, allowing you to carry more bits per Hz for
better frequency use. obviously, the further away the two comms points
are, the lower modulation you can use and thus reduce your bits/Hz ratio.

at the same time, laws of physics apply, i.e. the higher the frequency,
the lower the possibility that it will permeate a wall or two (or even
moisture in the air for that matter). it is the moisture in the air thing
which usually throws US based wireless vendors specs out of whack when
they come to malaysia.

> So would a basestation only be able to support 100 simultaneous users
> if each person uses their full bandwidth?  Can a basestation

normal fwba base stations will support numbers in the thousands of users.

> segment by direction, i.e. can multiple people in different
> directions from the basestation use the same frequency?

two ways of segmenting a cell. one is by using different frequency
channels, the other is by using polarization to split adjacent sectors on
the same base station. another is by using sectoral antennaes to limit the
scope of a signal beam.

rf engineers usually use a combination of the above to squeeze the most
they can out of a base station.

Regards,                           /\_/\   "All dogs go to heaven."
dinesh@alphaque.com                (0 0)    http://www.alphaque.com/
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