Yeah, but while the AP is blasting to A, A isn't sending more requests (or even ACKs), so the buffers will not just refill. Once the AP is done emptying its buffers, B should have the same ability to talk as A. I'm not saying there can't be pathological cases, but it doesn't seem likely to be a very common occurrence.
TLDR version: the main performance killer in a wireless net is retransmit delays due to packet loss and collision. Reduce those by any means and your effective speed goes up a _lot_.
Thing is, there's medium speed, which is what you're talking about, and there's perceived speed, which is 'how long does it take to download my file', which includes things like retransmit delays. There was an article a few weeks ago that illustrated that if you can reduce retransmits by reducing collisions and/or packet loss, you can get some really huge improvements in perceived speed without any change to the speed of the medium.
Example: 50 megabit medium, 5 megabyte (40 megabit) file, which comes to around 3300 packets. Assume 1% collisions, that's 33 retransmits. Retransmits in TCP/IP start with 'wait a second and try again' so that's 33 seconds of waiting. So 0.8 seconds data transfer, 33 seconds of delay, total about 34 seconds. Cut the collision rate in half by moving to a "one speaker at a time" model, and you've doubled your perceived speed. Cut it down to 4 collisions and your effective speed is about 7x what it was before.
yeah, this would work for my daily commute with a bit of rerouting to avoid the freeway. Not so much for my wife, who actually needs to carry cargo sometimes, but that's why she has a CRV instead of a Civic:)
with a top speed of 50, this is not intended for the US and the ideas of minimal safety are a bit different in Japan (not least because the driving styles are entirely different).
Sweet. Still looking on the site for how much storage it has (or how to connect it to a belt pack or something); I've been wanting one of these to take to costume-heavy conventions for _years_.
although with those crushed silicon anodes from that other slashdot story, they may get a lot cheaper in a couple of years. Just in time for my wife and I to pay off her car and be ready for a new one for me:)
and by then it's 'reasonable', because nobody griped about it. I swear, if I had a time machine I would probably spend quite a bit of time going back to various people at various times and saying "no, be specific! If you want it to not reach a certain point, say that!"
and leaving the backup generators in an insufficiently drained basement. And not being able to get extra generators in because of hilly terrain and road damage.
not to hard to imagine. Anything with a real backspace beats a manual typewriter:)
If I got an ipad, I'm pretty sure a bluetooth keyboard would be my next purchase. A friend of mine has a hardshell ipad case with the keyboard built in. Makes a neat little terminal.
yeah, but within 5 minutes someone'll gripe that they got harmed by someone (even unknowingly) and they need compensation, and then there'll have to be laws on how to handle that.
It doesn't necessarily need support from the server hosting the content. Any router along the path could take the old-style packets and wrap them in new-style packets. Since the servers are likely to be using wired connections anyway, this technique might not help them a lot anyway; the real win is using this to beef up the connection from the radio tower (be it cell or wifi) to the client (be it cellphone or wireless card), and that's a much smaller set of hardware/firmware to update.
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Yeah, but while the AP is blasting to A, A isn't sending more requests (or even ACKs), so the buffers will not just refill. Once the AP is done emptying its buffers, B should have the same ability to talk as A. I'm not saying there can't be pathological cases, but it doesn't seem likely to be a very common occurrence.
TLDR version: the main performance killer in a wireless net is retransmit delays due to packet loss and collision. Reduce those by any means and your effective speed goes up a _lot_.
Thing is, there's medium speed, which is what you're talking about, and there's perceived speed, which is 'how long does it take to download my file', which includes things like retransmit delays. There was an article a few weeks ago that illustrated that if you can reduce retransmits by reducing collisions and/or packet loss, you can get some really huge improvements in perceived speed without any change to the speed of the medium.
Example: 50 megabit medium, 5 megabyte (40 megabit) file, which comes to around 3300 packets. Assume 1% collisions, that's 33 retransmits. Retransmits in TCP/IP start with 'wait a second and try again' so that's 33 seconds of waiting. So 0.8 seconds data transfer, 33 seconds of delay, total about 34 seconds. Cut the collision rate in half by moving to a "one speaker at a time" model, and you've doubled your perceived speed. Cut it down to 4 collisions and your effective speed is about 7x what it was before.
yeah, this would work for my daily commute with a bit of rerouting to avoid the freeway. Not so much for my wife, who actually needs to carry cargo sometimes, but that's why she has a CRV instead of a Civic :)
Eh. I've been in a Lamborghini. Beautiful exterior, but I don't like craning my neck enough to drive from a lawn chair :)
with a top speed of 50, this is not intended for the US and the ideas of minimal safety are a bit different in Japan (not least because the driving styles are entirely different).
Because one can get that much from hospitals that can't use the open source one because it's not certified?
wiretap laws, maybe?
Sweet. Still looking on the site for how much storage it has (or how to connect it to a belt pack or something); I've been wanting one of these to take to costume-heavy conventions for _years_.
tell me, who's the victim of a guy who pees on a tree in the woods?
All rights? Any law? Either you need more specifics or I don't want to be in the same country as you.
Fits my range. I don't drive further than that unless I have to haul cargo, and for that I probably have a rented truck.
although with those crushed silicon anodes from that other slashdot story, they may get a lot cheaper in a couple of years. Just in time for my wife and I to pay off her car and be ready for a new one for me :)
... that you know of.
and by then it's 'reasonable', because nobody griped about it. I swear, if I had a time machine I would probably spend quite a bit of time going back to various people at various times and saying "no, be specific! If you want it to not reach a certain point, say that!"
At one time they had the modified versions for sale and the bonus item was the original theatrical version on a separate disk.
But my unmodified DVDs are definitely treasured :)
and leaving the backup generators in an insufficiently drained basement. And not being able to get extra generators in because of hilly terrain and road damage.
maybe. If the water starts spinning the impeller beyond what the generator can handle, they'll get decoupled and the generator will sit idle.
not to hard to imagine. Anything with a real backspace beats a manual typewriter :)
If I got an ipad, I'm pretty sure a bluetooth keyboard would be my next purchase. A friend of mine has a hardshell ipad case with the keyboard built in. Makes a neat little terminal.
It's in their best interest in the long term... but who cares about the long term? Quarterly reports, baybee!
yeah, but within 5 minutes someone'll gripe that they got harmed by someone (even unknowingly) and they need compensation, and then there'll have to be laws on how to handle that.
Even if they did absolutely nothing during that time, I'll lay odds that it would be a net improvement on average.
Nah, that'll be on google streetview soon.
I dunno, I think this is going on my list of places to check out next time I'm in Seattle to visit my niece.
It doesn't necessarily need support from the server hosting the content. Any router along the path could take the old-style packets and wrap them in new-style packets. Since the servers are likely to be using wired connections anyway, this technique might not help them a lot anyway; the real win is using this to beef up the connection from the radio tower (be it cell or wifi) to the client (be it cellphone or wireless card), and that's a much smaller set of hardware/firmware to update.