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Software Defined Network (SDN) is able to provide better network management and higher utilization for data center. However the centralized control of entire network may trigger large overhead and limit the scalability of control plane. In this paper, we propose an enhanced mechanism of elephant flow scheduling in SDN-based data center. The mechanism can efficiently reduce the overhead and improve...
HTTP adaptive streaming is used by a numerous video streaming services in the internet. It facilitates video streaming through heterogeneous network, without the need of a dictated streaming infrastructure. The benefit of HTTP Adaptive Streaming, compared to classical HTTP, is the reduction of the interruption, i.e. stalling event, and the use of bandwidth. This technology tries to adapt the video...
It is well known that the performance of wireless communication are quite sensitive to channel conditions and the transfer data rates are declining as the distance between the communicating peers is increased. In this paper are presented a set of results from a performance evaluation study of wireless communication based on the IEEE 802.11ac standard. The measurements were made between a pair of wireless...
In spite of the improvement brought by recent research on load balancing in video on demand (VOD) system, it still as an actuality problem. In this paper we propose a payoff-based dynamic segment replication policy called P-DSR which instead of replicating the entire video file, it divides it into several segments then selects the segments with the highest payoff which can rebalance load faster and...
Data consumption increased sharply, all triple play services such as Voice, Data-Internet & Video can be performed on one communication path, even fiber optic has also bandwidth limitations, previous studies tried to maintain the fairness among the users, but there is no fairness of service therefore the allocation of data transmission must be optimized as their needs. A Passive Optical Communication...
Future Internet proposals have employed edge-directed routing to realize the benefits of path choice by the sources (e.g., end users). However, economic issues hamper the adoption by ISPs: 1) ISPs' costs increase when sources choose paths that are not economically optimal for ISPs, and 2) ISPs have to overprovision their links aggressively since traffic engineering is shifted to the users and congestion...
Network steganography or covert channel allows one to initiate secret communication with the hope that such communication cannot be detected by adversaries. It appears to be a favourable tool that could bring the next level of communication secrecy for everyone. While there are number of research work into how such covert channels are formed and used, there are also a number of work investigating...
Recently, P2PTV is a popular application to deliver video streaming data over Internet network. On the overlay network, P2PTV applications create the logical links between pairs of peers considering round trip time (RTT) without physical network consideration. P2PTV packets are shared over a network without localization awareness which is the serious problem for Internet Service Providers (ISPs)....
In this paper, we analyze flow-based routing schemes in SDN. Specifically, we study the flow-based routing performance; combining the knowledge of the link condition and updating the period for calculating the path. The framework uses centralized control of SDN where the SDN controller calculates available paths to determine the routing policy based on a global knowledge network. This flow-based routing...
Considering that the current information content being exchanged is increasingly multimedia, it is quite natural to the demand for a relatively short time downloading or to a certain extent uploading large information files to the Internet. Mobility is increasingly demanded along with broadband. Certain to locations do not have the necessary infrastructure for broadband. Users that are residing in...
The effective bandwidth management in multi-service computer networks such as university networks has become a challenge in recent years. The growth of internet traffic and limitation of bandwidth resources persuade the information technology (IT) managers to focus on effective bandwidth allocation policies. One of the important issues discussed in this domain is how to assign the bandwidth fairly...
In these days, wireless AP's signal is all around us. Multiple APs are set up at a big area, enterprise, university, movie theater, etc. and small area, such as a private house. So wireless APs are not special to us. However, the APs with several tools that can manage multiple APs are hard to find and also too expensive to the public. To solve this problem, this paper discusses how to install the...
Few trends in education in the last century match the sudden onset of Massive Open Online Courses (MOOCs). The modern MOOC movement started in late 2011, when the first standard MOOC was launched. In few years, MOOCs have received immense coverage in media, academia and industry. MOOCs have established one of the key facts that education is no longer a privilege but a basic right. Students can learn...
This Paper presents a realistic approach on tackling the dynamic traffic generation problem for Wavelength Division Multiplexing Optical Networks. Given the relatively novel aspect of these networks, most research in this area was mainly focusing on the problems of routing and wavelength assignment while using fairly simplistic memoryless models for traffic generation in the simulated networks. The...
Apache Hadoop is the famous open source cloud computing software in recent years, the performance is much better than before due to lots of researchers' efforts, but its performance still has chance to be improved further because of unsatisfied distributed computing speed and slow response time from heterogeneous Internet's uncertain and dynamic environment. In this paper, coupling emerging GPU computing...
The market penetration of in-home entertainment systems is playing a crucial role in the diffusion of interactive multimedia services. In this context, thin-client game systems have received a lot of attention, shifting the computational burden of the game play toward the server while the client renders a fat video stream. This paper proposes an analysis of the network characteristics of the Remote...
In this paper, the performance of HTTP protocol and FTP Protocol is analyzed by using OPNET-based simulation. Firstly, related scenarios are modeled with OPNET Simulator. Furthermore, two case studies are conducted by choosing average queuing delay and TCP delay as performance indices respectively. In the case of HTTP protocol's performance, the changing trend with the increase of the number of clients...
As a new networking paradigm adapted to the shift of Internet usage, named data networking (NDN) shows a promising prospect. The enhanced NDN data plane calls for a flexible management of the incoming requests. In this paper, we tackle the problem of designing a forwarding strategy of content requests for NDN from a single-node point of view. Based on the Semi-Markov Decision Process (SMDP) theory,...
Ubiquitous Learning changing the existing paradigm of learning that is a learning process everywhere, every time and anything into the learning process right place, right time and the right thing, so that the determination of the appropriate content for the user and the system's ability to adapt to the user is important in ubiquitous learning. Context aware in ubiquitous learning can be used to achieve...
Wireless Mesh Networks (WMN) usually extend Internet access to unconnected mesh devices by extending the reach of wired access. Typically, in community WiFi networks, the gateway routers see no benefit for providing Internet access to the network other than having the capability of reaching other mesh devices. In this paper, we explore a WMN approach where all mesh devices are home gateway router...
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