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One of the main challenges in opportunistic networks is how to deliver messages effectively. Mobile nodes have to rely on encounter opportunities to exchange data due to no complete end-to-end path existing in such networks. In this paper, based on in-depth analysis of encounter occurrence process and contact frequency, we find that both of them exhibit unique power-law distributions. The great majority...
Opportunistic network that consists of mobile devices carried by social people is called community based opportunistic network (CON) which has community characteristics. Currently prevalent multi-copy routing algorithms in opportunistic networks have not considered these characteristics, therefore when these algorithms are used in CON, they will lead to high transmission delay and packet loss rate...
In a wireless sensor network for data-gathering applications, if all network data congregate to a stationary sink node hop by hop, the sensor nodes near the sink have to consume more energy on forwarding data for other nodes, which probably causes the early function loss of the sensor network. Employing a mobile sink can alleviate the hotspot problem and balance the energy consumption among the sensor...
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