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    <p>Try this then:</p> <ul> <li>Start with packets of 1KB size (for example).</li> <li>For them, calculate how many packets per second will be OK to send - for example - 1GB ethernet = 100MBytes of raw bandwidth -> 100000 packets</li> <li>create a packed so first 4 bytes would be the serial number, rest could be anything - if you are testing here, fill it with zeroes or noise (random data)</li> <li>on sending side, create a packets and push them at the speed of RATE (previously calculated) for one second. calculate time spent, and <code>Sleep()</code> the rest of the time, waiting for new time slot.</li> <li>on receiving end, gather packets and look into their serial numbers. if packets are missing, send (another connection) some info to the sender about it.</li> <li>sender, on info about lost packets, should do something like <code>RATE = RATE * .9</code> - reduce sending rate to 90% of a previous one</li> <li>sender should gradually increase rate (say 1%) every few seconds if it doesn't get any 'lost packets' message</li> <li>after some time you RATE will converge to something that you wanted in the first place</li> </ul> <p>Some considerations: - if back connection is TCP, you'll have some overhead there - if back connection is UDP, you can also have dropped packets here (because you are flooding the channel) and sender could never know that packets are dropped - algorithm above won't solve missing data issue or out-of-order data issue, it will just measure the throughput.</p>
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    1. POUDPclient rate control in c#
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    1. USDaniel Mošmondor
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    1. COThanks Daniel. Have a look at my current implementation here http://stackoverflow.com/questions/4167278/how-to-calculate-bandwidth-using-c. Corrent me if im wrong, from what i understand, if i send data for 1 second, and the receiver received data for 2 second, that means i have to readjust my sending rate until i get 1 second send and 1 second receive? pardon my language. im not good at explaining myself. this by the way, remind me of some papers on bandwidth estimation. one of em is pathload.thanks.
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      1. USSyaiful Nizam Yahya
    2. COWell, it's time you bang your head into it - you have all the info you need, now experiment until you get it right. Programmers do that from time to time, it's fun and it's most valuable experience. Have fun.
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