Calculation of charged traffic in GPRS network

Posted by TyBoer on Stack Overflow See other posts from Stack Overflow or by TyBoer
Published on 2009-01-27T16:13:40Z Indexed on 2010/05/01 4:07 UTC
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gprs

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billing

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network-protocols

I am working with a distributed application communicating over GPRS. I use UDP packets to send business data and ICMP pings to verify connectivity. And now I have a problem with calculating a traffic for which I will be charged by the provider. I have to consider following factors:

UDP payload: that is obvious.
UDP overhead: UDP header + IP header = 8 + 20 bytes.
ICMP echo request without data: IP header + ICMP payload = 28 bytes.
ICMP echo reply: as in 3.

Above means that for evey data packet I am charged for payload + 28 bytes and for every ping 56 bytes. Am I right or I am missing/misunderstanding something?

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