|Authors||G. Papastergiou, C. V. Samaras and V. Tsaoussidis|
|Title||Where does transport layer fit into space DTN architecture?|
|Afilliation||Communication Systems, Communication Systems|
|Publication Type||Proceedings, refereed|
|Year of Publication||2010|
|Conference Name||Advanced satellite multimedia systems conference (asma) and the 11th signal processing for space communications workshop (spsc), 2010 5th|
|Keywords||Aerospace electronics, bundle protocol, Context, convergence layer protocols, Deep-space communications, deep-space communications field, Delay, Delay Tolerant Networking, DS-TP, DTTP, end-to-end packet-oriented retransmission, End-to-end reliability, flow control, global overlay architecture, hop-by-hop reliable communication, network connectivity, OSI model, path diversity, redundant transmission, reliability, Routing, routing protocols, space communication links, space communication scenarios, space DTN architecture, Telecommunication network reliability, transport layer, transport layer services, Transport protocol, transport protocols, two-tier routing policy|
Delay Tolerant Networking (DTN) has been proposed as a global overlay architecture to provide network connectivity in challenged environments such as deep-space communications field. Bundle Protocol along with its convergence layer protocols transform end-to-end reliability into questionable hop-by-hop reliable communication and imposes a two-tier routing policy that allows flexible routes only within regions. Following the OSI model, in this paper we discuss the advantages and disadvantages of having a transport protocol relying on DTN for providing reliable and transparent transfer of data between end systems and offering common transport layer services such as end-to-end packet-oriented retransmission, flow control, path diversity and redundant transmission. In that context, we highlight features from DS-TP and DTTP that correspond to the requirements of transport protocols for space. We present space communication scenarios, which cannot be adequately addressed by the current DTN architecture.