[ibr-dtn] transfer of bundles

Hello

In order to analyze the results of some experiences I made, I need to know if two bundles are sent at the same time in one node.

Let's say that the scenario has three nodes. The middle node receives a fragment from the first and starts to send it for the last node. In the meanwhile the first node sends a second fragment to the middle one while he is still sending the first one to the last node. What happen? Are the two fragments sent at the same time or the last fragment is only sent to the last node when the transfer of first fragment to the last node is finished ?

Thank you

Best regards

Bruno Tavares