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Energy consumption in data center has already become a widely concerned issue in cloud computing research. There are many studies on data center energy efficiency optimization. But most of them focus on the energy consumption of the servers and cooling equipment. Few of them considered data center network (DCN), which is also a significant energy consuming component. By applying newly emerged Software...
The rapid development of cloud computing has raised big concerns over the high energy consumption of modern data centers. To satisfy the ever increasing data traffic needs, the energy consumption of data center network (DCN) also takes a significant proportion. The newly emerging technology, Software Defined Networking (SDN), which allows flexible control of network devices, brings a new opportunity...
Delay Tolerant Network (DTN) has been regarded as an important complementary networking paradigm to existing infrastructure-based networks. Without infrastructure support, the mobile nodes in DTNs opportunistically explore the communication opportunities to disseminate messages. As a result, the DTNs are characterized and challenged by the intermittent connectivities. To enhance the connectivity in...
Service provisioning has been widely regarded as a critical issue to quality-of-service (QoS) of cloud services in datacenters. Conventional studies on service provisioning mainly focus on task mapping, i.e., how to distribute the service-oriented tasks onto the servers to achieve different goals, e.g., makespan minimization. In distributed datacenters, a task is usually routed from its generation...
To understand the delivery performance of message dissemination in Disruption Tolerant Networks (DTNs), various methods have been proposed in the literature. However, existing work shares a common simplification that the pairwise meeting rate between any two mobile nodes is exponentially distributed. In this paper, instead of relying on such assumption, we jointly consider the transmission range and...
Development of Internet brings the great increasing communication requirement. This demand impels the developing progress of Voice over Internet Protocol (VoIP). It is difficult to supply the high quality user experience for VoIP services, which has brought great challenges to VoIP developer because of the dynamic property of Internet. We obtain the following results in lots of existing VoIP systems:...
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