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Due to the fluctuation of the bandwidth consumption of mobile users, the availability of a more flexible bandwidth pricing structure becomes important. Unfortunately, most mobile service providers only offer long-term contracts. Hence, wireless bandwidth sharing has a potential to become a niche market. In this paper, we propose the pay-per-second model, in which the price is based on the mobile net...
The Digital Agenda for Europe (DAE) mandates that 100-Mbit/s Internet access should be available to 50% of the households. Fiber to the Cabinet and Fiber to the Building are appealing architectures to quickly achieve this goal. This paper compares the standard copper technologies G.fast, VDSL2 and their enhancements in a multi-operator environment. The paper shows that both G.fast and the new EVDSL...
Caching is a core problem in Information Centric Networks (ICN) which can be considered as a network of caches. The design of effective caching algorithms involves a broad range of interrelated problems such as how to accurate predict the requests, and how to optimize cache replacement. In this paper, we develop a lightweight caching management algorithm motivated to maximize the traffic volume served...
In order to guarantee and optimize end-to-end Quality-of-Service (QoS) in heterogeneous and converged mobile Internet, a novel QoS routing algorithm proposed to optimize multiple QoS metrics on virtual Overlay platform based on Multi-Objective optimization is introduced at this paper. Because of the imprecise network information, the membership function and probability are combined to find a solution...
An information-centric network should realize significant economies by exploiting a favourable memory-bandwidth tradeoff: it is cheaper to store copies of popular content close to users than to fetch them repeatedly over the Internet. We evaluate this tradeoff for some simple cache network structures under realistic assumptions concerning the size of the content catalogue and its popularity distribution...
Network virtualization is considered to be not only an enabler to overcome the inflexibility of the current Internet infrastructure but also an enabler to achieve an energy-efficient Future Internet. Virtual network embedding (VNE) is a critical issue in network virtualization technology. This paper explores a joint power-aware node and link resource allocation approach to handle the VNE problem with...
As audiovisual communications services become the dominant traffic source in the Future Internet, their stable coexistence and their fairness towards background traffic is an active research topic. The Internet implements flow multiplexing in a decentralized fashion via congestion control. Audiovisual media streams, however, are classified as inelastic traffic flows that do not allow rate control...
This paper reports on work in progress on modeling of the effect of packet-level TCP congestion avoidance dynamics on flow-level Internet performance and management including buffer sizing under arriving/departing flows. The proposed model accounts for the packet-level TCP burstiness due to congestion avoidance dynamics by incorporating the entire effective bandwidth of TCP-controlled traffic as opposed...
With the popularity of the P2P applications in the Internet, the study of the P2P file-sharing system becomes more important. BitTorrent is a preliminary and the most successful P2P file-sharing application in the Internet, and has all the typical characteristics of the P2P file-sharing systems. In this paper, we propose a dynamic model of BitTorrent-like P2P File-Sharing System. The model describes...
Smooth rate control schemes are necessary for Internet streaming flows to use available bandwidth. To equally share the Internet bandwidth with existing Transmission Control Protocol (TCP) flows, these new schemes should meet TCP-equivalent criterion, i.e., achieve the same transmission rates as TCP under the same network conditions. However, when the available bandwidth oscillates, many of these...
The eXplicit Control Protocol (XCP) is a promising congestion control protocol that outperforms TCP in terms of efficiency, fairness, persistent queue length, and packet loss rate. XCP quantitatively informs senders how to adjust their sending rate, and assumes that all senders will respond. However, short-lived flows are often on the order of a few segments, they may be unresponsive to XCP feedback,...
Xunlei is a P2P file sharing application that is popular in China. The performance of previous P2P applications is limited by the selfishness of peers and the widely use of firewall. Xunlei applies implicit uploading strategy and firewall bypassing technologies to conquer above drawbacks. To evaluate the effects of above solutions, we perform a series of measurements on Xunlei and BitTorrent networks...
Network virtualization has been propounded as a key diversifying attribute of the future inter-networking paradigm. Although exciting progresses have been made in this area, understanding the performance of end-to-end service delivery in network virtualization is still a significant opening topic that requires analytical modeling and analysis. Heterogeneity of the network infrastructures coexisting...
Recently network virtualization is considered as a powerful way to overcome the current ossification of Internet, and is viewed as the keystone of the next-generation network architecture. In network virtualization, virtual network (VN) embedding problem, which assigns virtual nodes and links to physical network, plays an important role. Due to the scarcity of physical resource, efficient and effective...
In less than two decades, computer viruses and worms have grown from an anomaly to an everyday occurrence. In response to such a threat, the academic community has started a set of research projects seeking to understand worm behavior through creation of models. Staniford created a model to explain the propagation behaviors of worms in computer network environments. Liljenstam added a spatial perspective...
In the highly connected Internet most of domains have more than one interconnection link to different providers. In such a multi-homed scenario destinations for inter-domain traffic may be reachable through multiple egress routers with different offered cost and path performance. In this paper, we address the problem of route selection in a multi-homed stub network to optimize transit costs and paths...
Overlay routing is an application-level routing mechanism and existing research has revealed that overlay routing can improve user-perceived performance. On the other hand, overlay routing may harm the ISPs' cost structure because of the policy mismatch between IP routing and overlay routing. In a previous study, we proposed a method to reduce inter-ISP transit cost caused by overlay routing while...
SimRank has been proposed to rank web documents based on a graph model on hyperlinks. The existing techniques for conducting SimRank computation adopt an iteration computation paradigm. The most efficient technique has the time complexity O(n3) with the space requirement O(n2) in the worst case for each iteration where n is the number of nodes (web documents). In this paper, we propose novel optimization...
Correct estimation of the available bandwidth in overlapped WiFi WLANs environments is one of the essential functions for efficient network resource management and seamless mobile service provisioning of QoS-guaranteed realtime multimedia applications in future Internet. In this paper, we propose a cognitive passive estimation of the available bandwidth (cPEAB) by correct measurements of i) the proportion...
Internet video broadcasting allows video playback simultaneously by many users in a network. Most broadcast approaches are limited to (i) one video broadcast server, and (ii) a fixed play time for all nodes. With only one server the more users join a broadcast program, the more load on the server. To solve this problem a mixture of characteristics from live-video streaming and video-on-demand is proposed...
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