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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...
This paper presents the methodology of defining the measurement trigger conditions and evaluation conditions of LTE cell reselection for release 9 capable UEs. In the proposal of cell reselection parameters, the RSRQ measurement quantity is considered to account for the increase of packet traffic in LTE networks. In addition, the proposal is designed to improve the end user experiences such the LTE...
Due the complexity of the wireless environments, single technology cannot be efficient to provide demands of mobile users. Hence, in cooperation with heterogeneous wireless technologies, the next generation of wireless systems makes it possible to communicate everywhere. Providing high performance and data rate is what this cooperation has promised to meet. So issues related to the heterogeneity of...
Physical unclonable functions (PUFs) and biometrics are inherently noisy. When used in practice as cryptographic key generators, they need to be combined with an extraction technique to derive reliable bit strings (i.e., cryptographic key). An approach based on an error correcting code was proposed by Dodis et al. and is known as a fuzzy extractor. However, this method appears to be difficult for...
Internet censorship threatens people's online privacy, and in recent years, new technologies such as high-speed Deep Packet Inspection (DPI) and statistical traffic analysis methods had been applied in country scale censorship and surveillance projects. Traditional encryption protocols cannot hide statistical flow properties and new censoring systems can easily detect and block them "in the dark"...
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