Storage Usage of Custody Transfer in Delay Tolerant Networks with Intermittent Connectivity
نویسنده
چکیده
Delay Tolerant Networks (DTNs) operate in a environment characterized by intermittently connected links and long, variable latency. End-to-end reliability schemes, such as TCP, perform poorly, or not at all, in this environment. Source node storage becomes a constrained resource when intermittent links have long downtimes or latency to receive acknowledgement from the destination is long. To alleviate this constraint, custody transfer is a proposed DTN reliability scheme using hop-by-hop reliability to enhance end-to-end reliability. A simulation study of storage usage is presented in this paper comparing endto-end reliability and custody transfer with three different intermittent link connectivity schedules. The results presented show significantly lower storage usage when custody transfer is used as opposed to end-to-end reliability in intermittently connected networks for all schedules considered.
منابع مشابه
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