jgombos
join:2003-05-19
Fort Wayne, IN
3 edits | How to rapid fire syn's over an intermittent connection
There are times when EVDO service goes unstable.. Eg. it snows, and the blue LED on the CDU680 goes solid over half the time, randomly.
I know someone who has the very same problem on conventional dialup.. the browser just goes to lunch periodically on poor quality connections. Web pages with dynamic content become impossible to use.
Rather than try to improve the connection itself, I want to focus on how to make use of this kind of low quality uplink. When I make an http request, it times out even when the connection improves for enough time to load a page. I suspect the problem is that the browser makes the initial request, and it either doesn't get through, or it gets lost. I've noticed that if I study the modem lights and click to reload the instant the connection improves, it will often work.
Well closely monitoring the uplink status is not only a pain, but I may have to set this up for someone who doesn't have the patience or the skill to know when to strategically hit the reload button. So the question is: Is there a browser or http proxy that will rapid fire requests until the web page loads?
Or what other approaches are useful for coping with intermittent connectivity?
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netwire
Premium
join:2001-04-27
Mooresboro, NC
 ·RoadRunner Cable
 ·Millenicom
·Sprint Mobile Broa..
 ·Vonage
| That is a strange issue, I've not had that problem when it snows or sleets so I don't think it's EVDO in and of it's self. The issue could be with a connection point between your tower and the backbone. As per the dial-up I had problems with mine whenever it would raid but that was due to out-dated damaged lines in my area.
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jgombos
join:2003-05-19
Fort Wayne, IN
1 edit | said by netwire  :That is a strange issue, I've not had that problem when it snows or sleets so I don't think it's EVDO in and of it's self. The issue could be with a connection point between your tower and the backbone. So EVDO is impervious to water? I suppose it's a moot point, whatever it is, it's a situation I have limited control over, and need a means to work within it.
said by netwire : As per the dial-up I had problems with mine whenever it would raid but that was due to out-dated damaged lines in my area. That is indeed the case here. The house is way out in the sticks, with old lines that probably have breaks in the insulation, and to top it off the phone company is using equipment to share as few physical lines as possible with all the homes in this remote area, so it usually connects at 18-24kbps. The person using that connection is non-technical, in fact techno-hostile, impatient, and easily put into a state of rage at the slightest malfunction. I need to get this connection as fault tolerant as possible, because the user is intolerant. I can't be there to hit the browsers reload button whenever the RX light on the lan modem stops unexpectedly.
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jgombos
join:2003-05-19
Fort Wayne, IN
1 edit | reply to jgombos
I know TCP guarantees delivery (unlike UDP), but not sequence. So the question is are browsers are so fragile to intermittent connections because they're not reassembling packets that are severely out of order?
I'm assuming guaranteed delivery means the sender must get an ack for every packet it sends, or resend it. Is it likely that the ISPs TCP traffic is not trully TCP compliant?
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nobleguy1
Premium
join:2008-01-31
Kouts, IN
·Millenicom
| I am not sure if this will answer your question or not but I will give it a try.
If you use Mozilla browser there is an extension called reload every. I think you can set it to 1 sec. It will then reload every second until it connects.
Sorry if this answer is way off course. |
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jgombos
join:2003-05-19
Fort Wayne, IN
| said by nobleguy1 :I am not sure if this will answer your question or not but I will give it a try. If you use Mozilla browser there is an extension called reload every. I think you can set it to 1 sec. It will then reload every second until it connects. Sorry if this answer is way off course. I appreciate the feedback. Although that approach doesn't have much finesse, I want to be aware of all the practical options and seems like that would be useful. It may even be the best answer, if there doesn't exist a means to reload intelligently (that is, as needed).
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