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Opportunistic networks are a form of mobile ad-hoc networks that exploit users mobility to provide data sharing. Individual nodes store, carry and forward messages using direct communication between devices; no fixed infrastructure of communication is required. The final goal is to reach the totality of the participating users. The efficiency of message diffusion depends on the users' mobility, the...
The Epidemic protocol is an effective way to achieve information diffusion in opportunistic networks. Its performance depends on two key factors: the device mobility pattern,, the message transmission time. The mobility pattern determines the contact time, duration. If contact durations are shorter than the required transmission times, some messages will not get delivered,, the whole diffusion scheme...
In this letter, we propose an analytical model based on delay differential equations (DDEs) to evaluate the diffusion of messages in groups taking into account the transmission time of the messages. This model was validated through simulation studies using the ONE simulator. Evaluation results show that, considering the impact of data transfer time is of utmost importance, as when message size increases...
The duration of batteries is a key factor that must be considered in the design and deployment of applications and services on mobile devices. The users of this technology are not aware of the energetic impact of the applications executing in their devices, especially if these applications present an adaptive behavior.
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