In-Network Retransmissions in Named Data Networking

Abstract

A core mechanism in every forwarding strategy is the decision of whether to retransmit an unsatisfied Interest or to wait for an application retransmission. While some applications request control of all retransmissions, others rely on the assumption that the strategy will retransmit an Interest when it is not satisfied. Although an application can select the forwarding strategy used in the local host, it cannot guarantee that the same strategy will be selected in other nodes in the network, especially in shared resource environments. In this paper we propose a simple forwarding strategy abstraction that allows the application to decide whether a network retransmission is required, and to differentiate application retransmissions from network retransmissions.