Working at an RF company I have learned another possible reason why the
PalmVII designers might have been wary of "push". A sophisticated digital
receiver generally needs a DSP for its implementation. Have you ever tried
powering a DSP chip off batteries? Even the low-powered ones eat more than
something like the Dragonball. With "pull", you crank up the transmitter,
listen for the answer, then turn off the whole radio until you're interested
in something again.
To receive packets being pushed to you, you have to leave the receiver on
all the time. It is not enough just to listen for a carrier, it's probably
there most of the time sending packets to someone else. You have to decode
the packets and look for the ones addressed to you. That means feeding
quite a few DSP horses all the time.
So there's another control issue with push -- being in control of your
battery. You can always write code to ignore packets you think might be
dangerous, but packets that aren't even yours cost you energy to receive and
discard.
> -----Original Message-----
> From: Laurence Lundblade [mailto:[EMAIL PROTECTED]]
> Sent: Friday, April 14, 2000 10:46 AM
> To: Palm Developer Forum
> Subject: Re: Is it possible to push the data on PalmVII?
>
>
> At 12:15 AM 4/14/00 -0700, Steve Sabram wrote:
> >KimDongGyun wrote:
> >
> > > I want to develop programs having something like push technology.
> > > Server pushes binary data to PalmVII for a specified time
> and then, PDA
> > > displays the data.
> >
> >This goes dead against the entire philosophy of the Palm
> VII. With the
SNIP
>
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