TCP/IP connection over GPRS stops receiving

[Anonymous]

I'm having problems with TCP/IP "freezing" with the XDA. What happens is that the XDA stops receiving messages if there's a period of inactivity over the IP connection of about 45 seconds.

The IP connection still works, and I can send messages from the XDA in the other direction, which then "unfreezes" the waiting messages and they then appear at the XDA.

GPRS is still connected throughout.

This happens both with my IP test apps and with MS Messenger. In messenger, if I start a chat with a PC and the person on the PC doesn't type anything for 45 secs, then no further message comes in from the PC until I send a message from the XDA, whereupon I get all the messages they sent to me.

This seems, therefore, to be a bug in the XDA's socket stack.

Is this a known problem and, if so, is there a fix?

I'm running BIOS version 3.12.07 ENG, 08/13/02.

Cheers,

MikeS.

[bamse]

Upgrade your software.

I had the same issue and fixed it by upgrading to 3.16.13 & 3.19.

[Anonymous]

Thanks bamse - was planning on doing that as soon as I get a smart card reader.

[nick.sturrock]

i have various different versions of the radio stack and bios on different devices but none of them are as recent as the versions you mention. can anyone tell me where to get these versions of the bios and radio software? did they come from microsoft or from the device manufacturer, or somewhere else perhaps?

thanks,

nick.

[bamse]

You might want to try this:

http://www.idedata.no/support/support.asp?ID=299

The files seem to be the same for all of the Scandinavian countries (SE/DK/NO), and they work just fine for me in Sweden. I don't know if anyone tried them anywhere else, but I can't see why they wouldn't work.

[nick.sturrock]

Thanks!

Not speaking Norwegian I'm not sure exactly what it says, but I already have Radio version 4.08 so I'm not going to change that. Is there a list of the problems that this release fixes that you know of? (There isn't one in the zip file) I'm specifically interested in fixes to the Communication Manager and GPRS connection handling and I don't know whether these would be in the BIOS upgrade or the Radio upgrade. I know that various people have Radio v6.x and ideally i'd like to get hold of this.

Any help you can give is much appreciated,

nick.

[bamse]

4.08 is actually way older than 3.19 (v8 compared to v19). From what I've read on this site, the first digit in the version number is sort of an area code that will differ between different areas rather than different versions. I am not sure the 3.XX would work for you as your original is 4.XX, but I think there has been a discussion about that in another thread.

What it tells you on the Norweigan page is more or less that you have to make the upgrades in the correct order, or they will fail and leave you with a non-working device.

I think the improvements you're looking for are in the radio upgrade, but for a stable device you should probably upgrade both at the same time.

[nick.sturrock]

I've also heard that in the UK, the O2 version of the radio stack has been 'optimised' (a moot point, since it doesn't currently work that well) for use over the O2 GPRS network, so I'm thinking it might be wise to wait for the official 4.x release. Unfortunately they're being slow in producing the update and we've got customers complaining about the reliability of the connectivity in our software when it's all down to the flaky radio stack (!)

Thanks for your help,

nick.

[Anonymous]

Just to update everyone: it was a problem with the radio stack not allocating resource for the return leg.

The problem went away when I installed radio stack 4.20.

MikeS.

[vpreHoose]

GPRS has an issue. The downlink is kept alive by sending packets in hte uplink, and vice versa. So if you are sending downlink UDP data with nothing on the uplink then the GPRS downlink will timeout after 62 seconds.

So if you are coding a video or audio streaming application please send an uplink packet now and then...
(Pay attention Microsoft WMP team)

[Anonymous]

try this program:

https://www.handango.com/PlatformProductDetail.jsp?siteId=1&jid=51F61833CXB549164DBC7F99F117BEB4&productId=69829&optionId=1_2_2&productType=2&catalog=30&txtSearch=gprs&sectionId=0&platformId=2

[mairaeva]

Could anyone send me a sample code creating and using socket over GPRS ??
I ve only found how to send HTP request over GPRS in the forum.

I d like to be able to send packets in UDP for a VoIP softphone.

THANK YOU FOR YOUR HELP