Performance Modeling Of Bundle Protocol(BP) Over Deep-space Channels

Delay/disruption tolerant networking(DTN) was proposed as an end-to-end networking architecture providing file delivery service in and/or through stressed communication environments. Bundle protocol(BP) of DTN utilizes the well-known store-and-forward mechanism together with custody transfer option for transmission reliability. However, little work has been seen in performance modeling of BP transmission in deep-space communications.In this paper, we present performance modeling of BP transmission over a relay-based deep-space communication system characterized by an extremely long signal propagation delay, and highly asymmetric channel rates. Analytical models are built to compute the minimal size of the bundle to avoid delay in CA transmission, to estimate the round-trip-time(RTT) of BP transmission, the number of transmission efforts taken for successful delivery of an entire file, and the total file delivery time and goodput performance. A testbed installed DTN implementation named Interplanerary Overlay Network(ION), developed by the Jet Propulsion Laboratory(JPL) in US is used to run file transfer experiments. Then the models are validated by file transfer experiments using this testbed.