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Wireless sensor networks (WSNs) are starting to have a high impact on our societies and, for next generation WSNs to become more integrated with the Internet, researchers recently proposed to embed IPv6 into such very constrained networks. Also, constraint application protocol (CoAP) and Observe have been proposed for RESTful services to be provided. CoAP/Observe supports the use of caches/proxies...
The near future Internet of Things (IoT) allows devices to discover and to establish cooperation autonomously in an opportunistic manner. While the incentive service is available, the front-end inter-organisational devices may help each other not only on sharing information, but they can also share their Internet connection towards saving energy. Considering that different devices may have been configured...
Network intrusion detection system (NIDS) is becoming an important element even in embedded systems as well as in data centers since embedded computers have been increasingly exposed to the Internet. The demand for power budget of these embedded systems is a critical issue in addition to that for performance. In this paper, we propose a technique to minimize power consumption in the NIDS called by...
Peer to peer networks offer an extensible framework for supporting video streaming service over the Internet. P2P networks efficiency highly depends on peers' contribution. In practice, some peers only use the service, but share few resources or do not share any resources. This phenomenon is called free riding which seriously affects the P2P networks efficiency. So, in order to encourage the peers...
In this paper, we propose CGM-PS, a partial-decentralized, un-starving, work-conservative, and preemptive coflow scheduling scheme to shorten the Coflow Completion Time (CCT) for TCP flows in data center networks (DCNs). In CGMPS, we propose both inter- and intra- coflow scheduling policies. In inter-coflow scheduling, we present P-SEBF, which adopts a connected-graph model based novel concept Partialcoflow,...
We investigate how to build a non-intrusive scheduled TCP. For the flows of a given origin-destination pair, the objective is to schedule their TCP segments (according to some desired criteria) without modifying the network bandwidth-share used by these flows, which in turn ensures friendliness with respect to the rest of the network. We show that in order for a scheduling algorithm to be strictly...
Network operators want to deliver multiple services to the end customers. This leads to the need of efficient transport of data using optical network technologies. OBS is a promising technology for metro networks, where the operator can locate their servers to provide services such as video, backup or PC virtualization. These services are competing for shared network bandwidth when running in parallel...
Distributed denial-of-service (DDoS) attacks continue to pose an important challenge to current networks. DDoS attacks can cause victim resource consumption and link congestion. A filter-based DDoS defense is considered as an effective approach, since it can defend against both attacks: victim resource consumption and link congestion. However, existing filter-based approaches do not address necessary...
In this work, a novel hybrid time scheduling scheme for conducting experiments in an online remotely-triggered laboratory is proposed. The scheme has been implemented in the NETLab online laboratory management system which has been embedded in the curricula of two undergraduate laboratory courses at Indian Institute of Technology, Kharagpur, India.
Energy efficiency is becoming an increasingly important factor to consider in day-to-day operations, and the Information, Communication and Technology (ICT) arena is no exception. The energy consumption in the ICT sector is increasing at a rate that deems energy consumption a possible limitation to the continuous fast growth of the future Internet. We address this limitation in two ways. (1) We propose...
P2P video streaming is a cost effective and scalable alternative for client-server based video delivery over the Internet. In P2P video streaming schemes, the Internet peers contribute their bandwidth for data dissemination in a multicast group. Since the performance of a P2P streaming system is dependent on contribution of the group members, free riders is one of the main challenges of such systems...
The peer-to-peer (P2P) networks provides a data distribution model that is attractive for Video on Demand (VoD) as it allows to decrease the costs and increase the scalability of video distribution. The two significant challenges in P2P VoD streaming are scalability and video quality. Both require efficient utilization of the resources in P2P network. Inspired by this finding, the paper addresses...
We consider geographically distributed data centers forming a collectively managed cloud computing system hosting multiple applications, each subject to Service Level Agreements (SLA). The Service Level Agreements for each application require the response time of a certain percentile of the input requests to be less than a specified value, with the non-conforming requests being charged a penalty....
Optimized Water Filling scheduling (OWF) has been studied previously for no peer leaving Peer-to-Peer (P2P) network, where the problem of efficiently delivering a common set of data from a single base station to multiple users that have heterogeneous uploading capacity was examined. In the absence of peer leaving, it has been demonstrated that OWF can achieve significant performance improvement by...
The recent emergence of clouds with large, virtualized pools of compute and storage resources raises the possibility of a new compute paradigm for scientific research. With virtualization technologies, consolidation of scientific workflows presents a promising opportunity for energy and resource cost optimization, while achieving high performance. We have developed pSciMapper, a power-aware consolidation...
The transmission of stream media over the Internet require a high bandwidth. While the best-effort network could not provide constant transmission speed. The proxy server (PS) is the nearest part of the Internet to the client. The proxy can cache the data, and release the load of the servers. So the proxies have great influence on the video QoS. Through the perfect algorithm, within the acceptable...
SIP (Session Initial Protocol) is attacked easily by DoS flooding thanks to it's open, the queue scheduling scheme can alleviate the SIP server's influence caused by DoS flooding attack at a certain extent. By analyzing SIP message character and existing queue scheduling scheme, we propose a INVITE DoS flooding attack defense mechanism based on CWFQ (Custom Weighted Fair Queue) and simulates it's...
Analysising WEB Geographic Information System (WEBGIS) status, found that the existing problem in the current system, combine the SVG with the Ajax, propose a idea of constructing a new WEBGIS system. First introduce a variety of techniques used, SVG technology has such characteristics as small storage space and the strong intercommunication, illustrates the possibility of using this vector graphic...
The proxy is one of the important parts of the Internet. The proxy can reduce the data flow and release the load of the servers. Because of the unpredictable problem of the network, the proxies have great influence on the video QoS. Through the perfect algorithm, within the acceptable scope, the proxy can improve the performance of the system. In the video service system, the proxy can improve the...
A solution is urgently expected to meet the higher-quality web service requirements of various applications on the limited bandwidth of internet. This paper presents a new scheme of load balance of web cluster servers, making possible the service of the two-class priority station polling system under the mixed policy of exhaustive and gated services, optimizing the services of the system in time of...
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