Date Added: Oct 2011
Delay Tolerant Networks (DTN) present many challenges that are not present in traditional networks. Many stem from the need to deal with disconnections which directly impacts routing and forwarding. However, as these networks enable communication between wide range of devices, there are secondary problems that routing strategies may need to take care of such as to deal with limited resources like buffer, bandwidth, power. Most of the routing protocols in DTN assume that the buffer size as infinite which is not the case in reality. In resource constrained environment, buffers will run out of capacity at certain point of time.