SPV's GPRS Speed Sucks!!!

[Guest Geniarse]

From what I understand, GPRS works by connecting multiple channels together, each running at 14.4kbps (so 3 x 14.4 = 43.2kbps, the 'maximum' speed of GPRS at the moment as far as i know).  It seems as tho the SPV is only connecting to 1 or sometimes 2 channels, while the P800 will happily connecting to 3.

This is HSCSD (High Speed Circuits Switched Data) that aggregates three data cells of 14.4Kbits/s to reach a theoretical speed of 43.2Kbits/s.

GPRS (General Packet Radio Service) using GSM networks have a theoretical maximum speed of 107.2Kbits/s.

Maximum GPRS data transmission depends on:

The number of voice channels supported by the phone (not more than 8 channels, each of which provides a data transmission rate of 13.4 Kbit/sec). Most mobile phones on the market support not more than 4 channels at the same time.

The number of free channels available at the time of transmission.

General quality of radio coverage.

As usual these discussions will go round and round in circles and never seem to get aired to the right people. i.e., Orange/HTC/Microsoft.

[Guest adrianfox]

Maybe Paul could use his contacts to raise this as it is quite a major issue :)

[Guest Simon Desser]

Maybe Paul could use his contacts to raise this as it is quite a major issue :lol:

I agree, any chance Paul :?:

[Guest Big Ron - No Longer a Mem]

GPRS is based on current network availability, yes slots are connected together but voice slots are allocated as a priority, GPRS is not based on quality of service, its always best endeavours.

Maybe Orange have got it wrong (which would be no suprise) but they're under the apprehension that GPRS uses totally different "nodes" to regular CSD calls, and is NOT used for voice at all. That's why (for example) they use mapping software at 156 which shows coverage of voice calls, and the DIFFERENT GPRS coverage. It's also why there are places like a point just outside Eccles (Lancashire), or parts of Dorset, where you can make Voice calls... but there's zero GPRS coverage. With CSD rather than GPRS, if there are too many users, you simply won't be able to connect. With GPRS, you will... but at a snail's pace as your data joins the "queue".

[Guest Simon Desser]

All of this makes interesting reading, and is good to know. But what I want to know, plain and simple:-

Why is the SPV 3 times slower on GPRS, on the same network, in the same room, under the same conditions, than the P800 :?:

[Guest Big Ron - No Longer a Mem]

"Why is the SPV 3 times slower on GPRS, on the same network, in the same room, under the same conditions, than the P800" Why is surfing the web on a P4 faster than a 486, when both have the same 56k modem fitted, and use the same phone network? Why is surfing the web on that SAME 486 faster when you increase the amount of RAM? Or when you've defragged the hard drive...? Is it the phone line that causes the differences?

[Guest Simon Desser]

Ron, I understand what you're saying, but don't accept that this could possibly account for a three times speed increase!? Especially when we all know that the SPV's WERE considerably faster before the UK update!