Abstract
Delay Tolerant Networks (DTNs) is a mobile wireless network, in which it is difficult to establish end-to-end paths. Meanwhile, the nodes transmit message copies randomly, resulting in a high overhead of message propagation. In this paper, a Transfer Utility of Node Spray and Wait (TUoN-SNW) routing is proposed to forward the message copies dynamically, which avoid randomness of Spray and Wait routing protocol when message copies are forwarded. And in order to reduce the overhead, a Based on Transfer Utility of Node's Buffer Scheduling Strategy (BTUoN-BSP) is also applied. Simulation results show that compared with the Spray and Wait (SNW) routing, the algorithms could not only improve the delivery rate but also reduce the overhead of network obviously.
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