GPRS DataTransfer Average Speed

**Iphone** · 29-Mar-2007, 02:25 AM

Does anybody know what is the average time for a packet to travel across the GPRS network? I know that it depends on a lot of factors (route, origin, destiny, etc. ) but I just need to have some numbers to compare to my app.

What I have is two terminals exchanging date using the GPRS network through UDP packets. So far my packets (20 to 1000 octets in average) are taking 2.0 to 3s to go from one terminal to the other.

Is that a reasonable delay or is it to slow? What would be the best protocol to transfer data considering speed the main issue?

**Iphone** · 29-Mar-2007, 02:25 AM

ric_vas:
Thanks OnixExp!!

That´s exactly the values I'm getting during my tests. I also find out that when I'm exchanging data inside the GPRS network (i.e. between two terminals connected to the GPRS service) the delay is increased when compare to the values I get while sending and receiving packets from the Internet (outside GPRS network).

I was not able to find a very good explanation for that (maybe too much "Over the Air" phases???).

Anyway, here are my data:

Accessing Internet: 700ms to 1500ms roundtrip;
Between GPRS Terminals: 3000 to 4000ms roundtrip

29-Mar-2007, 02:25 AM	#1 (permalink)
Iphone Fixed Error! Posts: 4,202 Join Date: Mar 2007 Rep Power: 6 IM:	GPRS DataTransfer Average Speed Does anybody know what is the average time for a packet to travel across the GPRS network? I know that it depends on a lot of factors (route, origin, destiny, etc. ) but I just need to have some numbers to compare to my app. What I have is two terminals exchanging date using the GPRS network through UDP packets. So far my packets (20 to 1000 octets in average) are taking 2.0 to 3s to go from one terminal to the other. Is that a reasonable delay or is it to slow? What would be the best protocol to transfer data considering speed the main issue?

29-Mar-2007, 02:25 AM	#2 (permalink)
Iphone Fixed Error! Posts: 4,202 Join Date: Mar 2007 Rep Power: 6 IM:	Re: GPRS DataTransfer Average Speed ric_vas: Thanks OnixExp!! That´s exactly the values I'm getting during my tests. I also find out that when I'm exchanging data inside the GPRS network (i.e. between two terminals connected to the GPRS service) the delay is increased when compare to the values I get while sending and receiving packets from the Internet (outside GPRS network). I was not able to find a very good explanation for that (maybe too much "Over the Air" phases???). Anyway, here are my data: Accessing Internet: 700ms to 1500ms roundtrip; Between GPRS Terminals: 3000 to 4000ms roundtrip

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