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The location of node is a research focus in wireless sensor networks (WSNs), and it is the foundation of the service based on the node location. In this paper, we propose a new localization method to improve the moving-baseline localization(MBL) performance by using second-order system. This method takes advantage of precise properties of MBL. We improve the localization accuracy by accurate fitting...
Urban traffic congestion state detection has been a problem of concern at home and abroad. The mainstream and traditional ways to detect traffic congestion state include manual survey, fixed traffic information collection technology and mobile traffic information collection technology. These methods all have obvious flaws such as the sample size of these methods is limited and additional equipment...
As the rapid growth of the data traffic, the mobile cellular network is under unprecedented operation pressure. Various of small cells with relay technologies have been proposed to bypass increased data with the status of the limited base station so far. Therefore, vehicular small cell gradually are attracting the attention of the researchers. In this paper, we discuss the communication model of the...
Deploying multiple antennas on high speed trains is an effective way to enhance the information transmission performance for high speed railway (HSR) wireless communication systems. However, how to efficiently deploy ($N\geq 2$) antennas on a train has not been studied yet. In this paper, we investigate efficient antenna deployment strategies for HSR communication systems where two multi- antenna...
The increasing of mobile devices results in the recent mobile big data era. A large number of useful information can be extracted from mobile big data. Extracting the residents' activity information from mobile big data is more and more popular in recent years because of its lower cost and higher accuracy. In this paper, we propose an algorithm to mine some meaningful residents' activity information...
Mobile network security and management are becoming important issues, due to the rapid development and widespread of the mobile network. Application traffic identification is a critical technology to resolve these issues. A variety of traffic classification methods on desktop applications are no longer effective in mobile network, because the majority of mobile traffic is carried over HTTP without...
The initial Named Data Networking (NDN) architecture design provided consumer mobility support automatically, taking advantage of NDN's stateful forwarding plane to return data to mobile consumers; at the same time, the support of data producer mobility was left unspecified. During the past few years, a number of NDN producer mobility support schemes have been proposed. This paper provides a clear...
The explosive growth of online videos brings a great pressure on LTE mobile networks caused by huge mobile data traffics. Deploying caches at the evolved packet core (EPC) and radio access network (RAN) in LTE mobile networks can efficiently relieve this pressure by the way of reducing duplicate content transmissions. In this paper, we propose collaborative caching algorithms for the LTE mobile network...
Face detection has been a very active research topic in recent years. However, when applied to uncontrolled environments, some systems exhibit poor generalization ability. Even though few of existing methods can achieve promising results in some challenging situations, they usually have the requirement of high computational cost. This will definitely limit the use of those methods in some mobile platforms...
According to the lightning protection requirements of the facilities and equipments in oil depot, this paper proposes the integrated mobile lightning protection device and technology to protect lightning strike in different regions of oil depot, analyses the systemic composition and the technical characteristics of the integrated mobile lightning protection device and technology, and practically applies...
A novel algorithm for evaluating the quality of movable signal coverage in gridded area is proposed in this paper. The algorithm makes use of minimum mean-squared error rule to fit the path loss formula in Okumura-Hata model, combining the existing field test data, and then calculates the signal strength of each grid in the designated area by combining the fitted path loss formula and the parameters...
In existing mobile content service systems, the study is quite rare on automatic situation-service rule construction. Hence, a method is proposed that the semantic association rules between situations and preferences are built by quantitative frequent marked lattice. Different recommendation rules can be extracted along multi-dimensional context routes from this lattice structure. It is propitious...
In mobile communication, the covering range and the interference is considered to be so important in each base station that it is necessary to know the regional transmission loss. Currently, there is a high margin of error in actual transmission loss model on the sea. This paper presents a propagation loss model. After doing many experiments, the results show that the error between the models predicted...
Physicists agree that decision tree is an interesting new topic in the field of programming languages, and statisticians concur. Here, we show the development of decision tree. In our research we use replicated epistemologies to verify that an novel networks fault diagnosis method using decision tree is compatible.
The theory solution to embedded mobile database is defined not only by the study of embedded technology, but also by the confusing need for mobile technology. In our research, we verify the simulation of access points, which embodies the structured principles of embedded mobile database on mobile agent. In order to accomplish this mission, we propose an analysis of embedded mobile database based on...
Polarized antennas equipped in multi-input multioutput (MIMO) systems are anticipated as space-effective alternatives. In this situation, the impacts of polarization configurations on fading correlation should be considered. A novel model with flexible polarization orientation is proposed for calculating spatial correlation. The model demonstrates that introducing of polarization reduces the spatial...
In this paper, we propose a novel spatial autocorrelation model of the shadow fading process in urban macro environments. The proposed model is based on the empirical results obtained from extensive wideband radio channel measurement campaigns at 2.35 GHz in an urban area of a typical medium-sized Chinese city. The shadow fading component was extracted assuming a single-slope log-distance path loss...
The wideband channel measurements at 580 MHz, 2.35 GHz and 4.90 GHz have been performed in the urban micro- and macrocell scenarios in the cities of China with multiple-input multiple-output (MIMO) channel sounder. The measured cases include line-of-sight (LOS) and non-line-of-sight (NLOS) propagation. Statistical results and comparative analysis for both scenarios are presented in this paper, including...
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