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Node buffer size has a big influence on performance of Mobile Opportunistic Networks (MONs). This is mainlybecause each node should temporarily cache packets to deal with the intermittently connected links. In this paper, we study fundamental bounds on node buffer size below which the network system can not achieve the expected performance. Given the condition that each link has the same probability...
Mobile crowd sensing is a new paradigm that takes advantage of pervasive mobile devices to efficiently collect data, enabling numerous largescale applications. Human involvement is one of the most important features, and human mobility offers unprecedented opportunities for both sensing coverage and data transmission. In this article, we investigate the opportunistic characteristics of human mobility...
Probabilistic forwarding methods have been exploited in opportunistic networks to reduce the overhead of epidemic routing. However, most existing methods make all the nodes forward messages with the same probability (i.e., equal scheme), which causes the energy unbalance of nodes. To guarantee the energy balance of nodes and prolong the network lifetime, we design a differentiated scheme, i.e., different...
In this paper we study multi-copy routing schemes in opportunistic networks. Compared to single-copy protocols, the multi-copy schemes expedite the mean delivery delay while consuming more resources and exposing lower packet delivery ratio in resource-constrained system. To enhance the system capacity, most recent works explore the impact of social structure on network performance. Their results indicate...
We evaluate the performance of epidemic protocol in opportunistic networks. Early works follow an independent model which assumes that different messages in the network disseminate independently. Whereas, most recent work has pointed out that the same event can be detected by multiple nodes at different locations or different moments. Hence, the messages sensed by different nodes, indicating the same...
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