(keitai-l) Re: GSM, PDC and proprietary systems

Juergen,

majority of the 20% - 30% failed messages in the first attempt,
as Michael said, is because of the handsets powered-off or out
of coverage.

nobody can push the figure down to 5% because you cannot turn-on
the power from the network or move the handset to a better place
with "the force".

the 5% you mentioned I think maybe is for those handsets that are
powered on and in good coverage.  then the failures are likely to
be the jammed network, the i-mode mail center, the core network,
or the radio interface.

it's easier to send a short message than make a voice call where
the radio is weak, because short message doesn't need the signal
to be stable for long time.

then it means that well over 5% of subscribers in DoCoMo network
powered-on and within coverage, cannot make voice call.

what a beautiful network!

time is not an issue here, because i-mode never retries.  whenever
it tries doesn't affect the study of the failure rate.

cheers,

Ken


From: Juergen Specht <js@nooper.com>
Reply-To: keitai-l@appelsiini.net
To: keitai-l@appelsiini.net
Subject: (keitai-l) Re: GSM, PDC and proprietary systems
Date: Mon, 24 Jun 2002 08:40:12 +0900

>no network in the world, including the best turned Qualcomm
>cdma networks, can only do around 20%.  (I do know someone
>who claim much less, but I won't believe easily like you.)

It's not about believing, but than lets define what a "first
attempt" is...you claim that 20-30% of messages can not
delivered in a first attempt. My controlled tests speak a
different language, so we should define it first.

"Normally" a message is delivered to the handset some seconds
after you sent it. This is what I define as a first attempt. If
it comes some minutes after sending, did this already count as
failed (did a retry from the handset took place = second
attempt?) or is it just delayed in some complicated anti-spam
rules in DoCoMo's gateway before it is even ready to get
delivered to the handset, so it comes in still at the first
attempt?

Sometimes you also see the phenomena that a message will not
arrive and if you sent a second message, it "pushes" out the
first and second one. Sometimes in different order.

So how do you define a "first attempt"?

Thanks,

Juergen
--
Juergen Specht, CTO, Nooper.com - Mobile Services Inc., Tokyo, Japan
i-mode & FOMA consulting, development, testing: http://nooper.co.jp/


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