I wanted to make an improvement related to the fragmentation process. The fragmentation process is made node by node, which limits the efficiency of IBR-DTN. This process can be improved, by enabling the different parts of a bundle that could be received by a destination from different nodes.

For example, a node A has a bundle to send to node D. First, 30 percent of the bundle are sent to node B and then 70 percent are sent to node C. Then i want that node D is able to receive the fragments from B and C and reassemble them together. 

Do you have some idea how can i do this?

Is it and issue of the DTN or in the protocols of routing?

Thank you in advance,

Luis Guedes