[opendtv] Re: Small cells still not ready for mobile prime time
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Mon, 25 Jun 2012 11:50:48 -0400
At 5:01 PM -0500 6/24/12, Manfredi, Albert E wrote:
These are the two KEY points, IMO. Quoting:
1. "A carrier can increase its capacity as much as twenty-fold
adopting heterogeneous networks of small and macro cells,
2. "but only if it pools all its spectrum into one combined 3G and
LTE net, said Erik Ekudden, head of technology strategy at Ericsson."
There's also this related issue (quoting again):
"The amount of cellular coverage area subject to inter-cell
interference grows from 25 percent with macro cells to 40 percent
with macro and small cells, said Andrew Jun, vice president of
network strategy at cellular operator KT in Korea that has created
centralized pools of 144 to 1,000 cell sites."
And btw, let's not forget that when you use lower UHF frequencies of
the TV bands, this problem can only get worse.
Still, the "multiplier effect" achieved with small cells is clearly
way more than what an extra 120 MHz of TV spectrum can provide. When
we remember that these 4G channels are going to aggregate multiple
20 MHz channels into 80 or 100 MHz channels. You ain't going to get
no stinkin' 20X increase in capacity if all you get from the TV
giveback is 1 or 1 1/2 more LTE 4G channels.
I'm not sure why broadcasters would need to deploy small cells.
Perhaps in very localized areas like a football stadium. But
congestion is not an issue on a Broadcast LTE network as the goal is
to deliver multicasts.
The issue that may be relevant is cell synchronization of these
multicasts to deal with receivers that may "see" multiple towers...
Regards
Craig
----------------------------------------------------------------------
You can UNSUBSCRIBE from the OpenDTV list in two ways:
- Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org
- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word
unsubscribe in the subject line.
Other related posts: