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In terms of network security, software-defined networks (SDN) offer researchers unprecedented control over network infrastructure and define a single point of control over the data flows routing of all network infrastructure. OpenFlow protocol is an embodiment of the software-defined networking paradigm. OpenFlow network security applications can implement more complex logic processing flows than...
Node isolation is one of the fundamental metrics in the design consideration and evaluation of wireless ad hoc network. This paper is aimed to introduce a statistical framework for the computing of the isolation probability of a randomly chosen node in a wireless network. The statistical framework is proposed in the context of lognormal shadowing on Nakagami fading for multiple inputs multiple output...
In this paper, we propose the tuned free-space path loss modelling in high speed railroad considering Doppler effect. We use tuned free space path loss model which is utilized for measurement results at high speed railroad. The environment of high speed rail is mostly at viaduct and tintinnii over than 50 percent. The purpose of this paper is analyzing Doppler shift effect at viaduct and plain by...
Recently, the mobile communication has been rapidly changing the LTE-based mobile communication. In LTE-based mobile communication system, paging performance is a critical factor to be considered, a paging area is defined as TAC, which is group of cells. In this paper, we propose a new scheme for configuration of TAC to maximize the paging success rate. This scheme constructs a TAC using traffic load,...
In initial random access, base station (BS) estimates the distance between the user equipment (UE) and BS. In the mobile satellite system (MSS), however, the characteristics of large transmission delay makes the estimation method used in the terrestrial system not applicable in the MSS. To solve this problem, a two-step time delay difference estimation scheme is proposed for orthogonal frequency division...
The collaborative filtering is the traditional method in the recommender system. In order to improve the accuracy of recommender system, an improved collaborative filtering recommendation method based on the timestamp is proposed in this paper. Since the preferences of the user towards to items are a time series, so they are changing. Therefore, we choose user ratings that are related with the current...
In this paper, we advocate addressing the communication overhead problem between OpenFlow controllers and OpenFlow switches due to table-miss in a flow table. It may cause the communication overhead between controllers and switches because a switch has to send packet-in message to a controller for processing table-missed flows. We propose a simple flow entry management scheme for reducing the controller...
The human desire to develop high reactive, safety, precise and convenient control system makes smart machinery equipped with computing elements appear on the scene. Especially in order to get free of household affairs, the necessity of home service robot — that is a good example of control systems — has been increased. Home service robot is a robot used for household chores on behalf of human. We...
Nowadays, many mobile devices have multiple networking modules to receive data from various networks such as WI-FI, 3G, Wimax, DVB-H, etc. The mobile devices are used to receive multimedia streams through various networking interfaces. However, mobile characteristics can cause loss of packets and needs an effective method to recover the loss to provide high-quality multimedia streaming service. ARQ...
VANET (Vehicular ad hoc Network) is a special kind of ad hoc wireless network where every single node is a vehicle moving in a relatively high velocity, which leads to exclusive challenges like rapid changing topologies, safety and privacy concerns. In this specific network, the propagation of emergency messages could be critical to save human lives and property. Many researchers have proposed routing...
With the rapid development of smart grid, intelligent electric meters can be seen in most of the households, and the volume of electric energy data is in a rapid growth. This paper mainly aims at introducing an abnormity diagnosis platform in electric power system. It is used to distinguish the abnormal point according to the historical data and expert experience, and put forward some resolving scheme...
IPTV brought a new digital era in the broadcasting domain. The main change of digital broadcasting is an advent of a bi-directional interactive service feature. Using that bi-directionality, IPTV provides various kinds of convergence service such as information providing, advertisement, and e-commerce. But the number of services required to be developed and to be provided to users geometrically increases...
Stability test of high-rise buildings must be achieved periodically for the buildings' maintenance, but there are many problems that it is dangerous for inspector to make a personal test, it needs much time and cost, and accurate diagnosis is difficult. This paper proposes a monitoring system for construction stability test based on image processing to analyze and process data from sensors in the...
As the today's Web provides open communication environment for a variety of web resources, the Web of Things (WoT) offers new opportunity and challenges about the interoperation among the smart things. The well-known Web technologies can leverage the Web-enabled things to publish and exchange their resource information over the Web, then the Web-enabled thing should cope with the security threat regarding...
Traditional reliable transport protocols use end-to-end retransmission for the recovery of lost packets, which has high cost in Wireless Sensor Networks (WSNs). Hence, reliable transport protocols in WSNs use caching packets at the intermediate nodes in order to avoid costly end-to-end retransmission for loss recovery. Hop-by-hop retransmission scheme is one of the most important caching policies...
Energy consumption and computing performance are two essential considerations when service providers establish new data centres. The energy-saving cloud computing platform proposed in this study as potential applications in internet network information centres because of its excellent energy efficiency when manage large datasets. Increased data nodes in distributed computing systems greatly enhance...
Digital signage service is capable of providing advertisement contents and information to users using electronic displays with network capabilities. Compared to Traditional DID (Digital Information Device) that just provides contents one-way, digital signage service can provide more advanced functionalities such as user interaction and audience measurements. By measuring audience behaviour, it is...
LTE is defined as the 4G generation network providing high data rates. Channel estimation is important in the wireless system conception. Classical LMMSE channel estimation techniques require 0(JV3) floating operations and 0(JV2) memory locations (N is the size of the channel autocorrelation). In this paper, we propose fast channel estimation techniques for LTE based on fast solver for linear Toeplitz...
This paper proposes a mobile virtualization system based android-x86 virtual machine. The proposed system provides virtual services to a light-weighted device. Those are provided from the android-x86 based virtual machine. Here, light-weighted device is like a phone or a pad just having the ability of H.264 decoding and a virtual machine is based android-x86 using Oracle VirtualBox. In this paper,...
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