Abstract
The traditional flooding based routing protocols for the opportunistic networks like Epidemic or SnW (Spray and Wait) are blindfold on nodes selecting during the data packets forwarding, and besides, traditional probability based routing protocol like PRoPHET has the disadvantages of low transmission success rate and high transmission delay. So in this paper, we propose Encounter Tree Spray and Wait (ETSW) routing protocol combining with the respective advantages of them for routing in opportunistic networks, which exploits the encounter history of mobile nodes to reduce the blindness of data transmission between nodes. And the simulation results show that ETSW can improve the delivery rate, and reduce the transmission delay of data packets forwarding comparing with the traditional Spray and Wait routing protocols.
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