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With increased cloud adoption globally, the cloud service providers are setting up their data centers in various geographical location to cater the needs of diverse range of users across the globe. The cost of managing data center includes not only hardware, software costs but also the electricity costs prevailing at that location. The cost of electricity varies from location to location and it is...
As the Internet keeps growing, online video has become a great part of the current Internet data traffic, which will take over 80% of Internet traffic according to Cisco's report. Also, new and more heavyweight applications keep developing to fulfill people's growing requirements, like 4k resolution and visual reality videos. However, one single service provider, like a Content Delivery Network (CDN),...
Distributed cloud networking builds on network functions virtualization (NFV) and software defined networking (SDN) to enable the deployment of network services in the form of elastic virtual network functions (VNFs) instantiated over general purpose servers at distributed cloud locations. We address the design of fast approximation algorithms for the NFV service distribution problem (NSDP), whose...
With the development of network, IP geolocation technology has been widely used. Nearly all of the previous IP geolocation technology depends on the delay information. And most of them are based on the assumption of strong correlation between network delay and the geographic distance. But in China the correlation is weak. That makes the IP geolocation precision very low. To improve the problem, we...
In this work, we focus on designing high-throughput anycast mechanisms in a software Defined Network (SDN), as anycast routing serves as a fundamental building block for many services. Specifically, we investigate two main challenges for efficient implementation of a SDN-based anycast system: high throughput anycast routing (HTAR) and congestion-free anycast reconfiguration (CFAR). For the first challenge,...
Link flooding attack (LFA), as a new type of DDoS attack, can degrade or even cut off network connectivity of a target area. This attack employs legitimate, low-density flows to flood a group of selected links. Therefore, these malicious flows can hardly be distinguished by traditional schemes. In this paper, we propose a scheme called Woodpecker, which makes the LFA more difficult to take effect...
It is important to build overlays for topic-based publish/subscribe (pub/sub) under resource constraints. In a topic-connected overlay (TCO), each topic t induces a connected sub-overlay among all nodes interested in t. Existing work merely consider how to optimize a complete TCO and implicitly commit the unrealistic assumption of unlimited resources. In contrast, we make maximum use of restricted...
For Internet service providers to efficiently use network resources, they need to conduct traffic engineering to dynamically control traffic routes to accommodate traffic with limited network resources. The performance of traffic engineering depends on the accuracy of traffic prediction. However, the volume of network traffic has been changing drastically in recent years due to the growth of various...
The ability to perform vehicle tracking is very useful in daily life — today, such as security on personal vehicles, public transportation systems, fleet management and other mass transit. In this study, we designed an application of Geographic Information Systems (GIS) that will be applied to public transport services. This system provides real-time position tracking of each vehicle (taxi) and capable...
Currently, there are ongoing research and development efforts directed to data offloading. Data offloading allows load distribution by suitably allocating data communication traffic to other systems, such as wireless LANs or vehicle-to-vehicle communication systems. Especially, there is also ongoing research into traffic offloading using vehicle-to-vehicle communication. In traffic offloading using...
Wide range of researchers have explored and criticized the in-network caching performance for a set of algorithms, recently. While there are quite a few caching architecture proposals for Information-centric networks (ICN) to increase the effectiveness of it, there has also been criticisms against it stating that clever ideas do not improve the efficiency latency-wise. On the other hand, the default...
Software Defined Network has a centralized controller that regulates packet forwarding by updating flow tables of switches. The sole responsibility of these OpenFlow-enabled switches is to forward packets according to rules in their flow tables. The function of Software Defined Network is similar to the traditional IPTV protocol that there are Rendezvous Point be the intermediate node. Rendezvous...
This paper presents the design, analysis, and implementation of a novel data center network architecture, named NovaCube. Based on regular Torus topology, NovaCube is constructed by adding a number of most beneficial jump-over links, which offers many distinct advantages and practical benefits. Moreover, in order to enable NovaCube to achieve its maximum theoretical performance, a probabilistic oblivious...
A fat-tree network is scalable, but the probability of network faults also increases with the fat-tree size. Faulttolerant routing in fat tree is thus particularly important. Instead of relying on a time-consuming centralized recovery process, a fast local rerouting algorithm is highly desirable. A deflection based fast local rerouting algorithm, which we call it Local Rerouting by Deflection (LRD),...
Data center networks become increasingly important with the growth of cloud computing. For any integers k ≥ 0 and n ≥ 2, the k-dimensional DCell, Dk,n, has been proposed for one of the most important data center networks as a server-centric data center network structure. In this paper, we propose an efficient algorithm for finding disjoint paths in node-to-set routing...
As cloud computing goes, How to provide a security cloud becomes an important problem. Virtual networking plays an important role in cloud computing infrastructure. To identify which node is a critical node become an important research question. In this study, our team analyzed the fat tree network and small-world network, and proposed a network modeling method for the virtual networking. On this...
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...
Mobile social networks (MSNs) are a kind of delay tolerant network that consists of lots of mobile nodes with social characteristics. Recently, many social-aware algorithms have been proposed to address routing problems in MSNs. However, it also brings more security and privacy concerns. In this paper, we discuss a specific type of Sybil attack in MSNs, which few researches has been focused on. We...
This paper presents a distributed lookup protocol named Automatic Balancing Chord(ABC) to solve load imbalance problems in distributed system. Load balancing problems in P2P environment have an important impact on the performance of P2P applications, which are probably caused by allocation of the peer address space, the difference of load size, query uneven distribution and so on. This paper proposes...
Mobile ad hoc network (MANET) is a decentralized, multi-hop, and dynamic network with least infrastructure. Therefore, it is necessary that they should be self organizing, self healing, self configuring and adaptable to frequent changes in network. Ant Colony Optimization presents a problem-solving paradigm that suits the dynamicity and mobility of mobile ad hoc networks. In this paper we propose...
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