[amsat-bb] Re: FM satellites
bruninga at usna.edu
Wed Jul 6 17:33:03 PDT 2011
The issue here is not the failure of the cell site, it is the 10 million
people that all try to use their cell phones at once. It takes days for
people to get their "urgent calls through" before the load goes down enough
to have any hope of getting in. But like in Haiti, even after a few days,
the emergency persisted and still everyone needed to use their phones for
urgent requirements and so the load on the few hundered cell channels
At least until most people's batteries went dead (due to no power) and only
after most of those phones became useless was the demand low enough for
those still with enough charge to get a call through.
Again, this is my assumption, not known to be fact. But the fact of
cellphone LOAD after a wide area emergency totally blocking service is
pretty much fact.
From: Gregg Wonderly [mailto:greggwon at gmail.com]
Sent: Wednesday, July 06, 2011 5:49 PM
To: Bob Bruninga
Cc: 'i8cvs'; rnutter at networkref.com; 'Dave Guimont'; 'Amsat - BBs'
Subject: Re: [amsat-bb] Re: FM satellites
On 7/6/2011 4:30 PM, Bob Bruninga wrote:
>> In emergency situation novadays a cell-phone
>> is much much better and reliable.
> I think there are a lot of people in Haiti that might disagree
Unfortunately, we have a lot of people with ham licenses who have never
understood or seen the complexity behind cellular networks to understand how
fragile they actually are. Sure, the cell site is wireless to you, but it
power and wired telephony requirements that put it several steps on the risk
ladder above a ham repeater, and extremely high risk for failure compared to
simplex radio comms.
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