Applied Mechanics and Materials Vols. 411-414

Abstract: In this paper, we investigate Device-to-Device (D2D) communication underlaying cellular networks to provide spectrally efficient support of local services. Since in underlay mode, D2D communications share resources in the time and frequency domains with cellular system, it will introduce potentially severe interference to the cellular users and accordingly presents a challenge in radio resource management. In order to avoid generating interference to the high-priority users (cellular users) operating on the same time-frequency resources and to optimize the throughput over the shared resources under the transmit power and the quality of service (QoS) constraints, we propose an interference alignment-based resource sharing scheme for D2D communication underlaying cellular networks. The simulation results demonstrate that by using the proposed scheme, D2D communication can effectively improve the total throughput without generating harmful interference to cellular networks.

Abstract: This paper presents a method to support real-time data communication over switched Ethernet. The work without modifications in the Ethernet hardware and coexists with TCP/IP suites. Experiment results shows that compared with conventional real-time network protocol, the proposed work has better real-time performances and meets the requirements for industrial control network real-time applications.

Abstract: Building supporting technologies of wireless sensor network system, the data acquisition network scenarios, Win CE and ZigBee technology, design a typical multi-level network model to achieve the CC2430 chip integrated positioning enginewireless communications, applications, short-range multi-network node microprocessor WinCE operating system the center gateway human-computer interaction platform to connect to the public network via broadband and the public telephone network, the use of serial wireless communication terminal acquisition part and gateway platformdata transmission, to achieve environmental monitoring, centralized management of data sent and comprehensive information.

Abstract: In the spectrum auction, bidding strategy of telecommunication operation enterprise is very important. Considing the telecommunication operation enterprise how to choose the optimal bidding strategy as the train of thought. According to the spectrum of value distribution characteristics to the enterprise, using incomplete information static game theory to construct the operating enterprise bidding game model based on the partial distribution, and obtained model’s Nash equilibrium through the simulation with numerical solutions of the form. At the same time, the equilibrium analysis found: enterprise’s valuation central tendency or fluctuation can positive motivate its equilibrium bid; Along with the enterprise central tendency of valuation and fluctuation amplitude of valuation increasing ceaselessly, increasing unit valuation incentive equilibrium bid increment continuously increase.

Abstract: In this paper, we optimize the routing and transmission power in hybrid wireless networks based on an interference-aware criterion. In particular, we consider a hybrid network consisted of a base-station (BS)-oriented network and a device-to-device (D2D) system cooperatively working on the same spectrum. Firstly, we formulate the joint optimization problem which aims to minimize the expected network cost for package delivery. Secondly, in order to analyze the relationship between the transmission power and the link cost, we develop a novel cost model considering the interference impact. Then we propose an efficient algorithm to solve the optimization problem. Finally we simulate the proposed scheme in the hybrid network based on LTE. The result shows an improved overall throughput, and demonstrates that the proposed scheme could well solve the compatibility problem of two wireless networks.

Abstract: This study aims to validate a model of consumer acceptance for 3G use in China. It integrates the technology acceptance model (TAM) and satisfaction theory to examine plans to introduce third-generation mobile phones to second-generation mobile phone users. In addition, this study considers the effect of self-construal on the perceived usefulness, perceived ease of use, subjective norms, prior satisfaction with 2G/2.5G, and intention to use 3G. The empirical results of this study show that the technology acceptance model partially explains consumers intentions to adopt 3G technology. Although consumers perceive that 3G is easier to use, this does not directly influence them to use 3G. Prior satisfaction with their current model of phone does not influence consumers intention to use 3G. Moreover, self-construal has moderate effects on the relationship between perceived usefulness, subjective norms, and the intention to use 3G.

Abstract: This paper uses the CTI technology and voice card to establish a new rural information service center based on the fact that the rural informatization construction is relatively backward in Three Gorges Reservoir area. The information service center adopts a unique design, which combines the computer technology, automation technology and communication technology and realizes the automation of the information service center. As a result, we can use the system conveniently and efficiently as long as we are in the place can make a call. The application results show that the system runs stably and reliably and has certain practicability and popularization value.

Abstract: Eliminating redundant readers is important for the performance improvement of the radio frequency identification (RFID) networks. This paper proposes an efficient approach for redundant reader elimination. A middleware-based model, which is formulated as a multi-dimensional optimization problem, is developed to evaluate the network performance. The real-coded genetic algorithm (RGA) is employed to search the optimal adjustable parameters. The simulation results reveal that the proposed approach outperforms other algorithms in terms of optimization precision and computing time.

Abstract: The term Internet of Things appears to have been coined by a member of the RFID development community circa 2000, who referred to the possibility of discovering information about a tagged object by browsing an Internet address or database entry that corresponds to a particular RFID. RFID and sensor networks are likely to become much more capable and pervasive in the world of IOT. Firstly, the tag and reader function of RFID system are introduced. Secondly, the relationship between the two parts of RFID system is described in the paper. Finally, the standardization of RFID EPC global application system is studied, and the architecture of EPCglobal analyzed.

Abstract: In RFID, when the amount of tags is large, scanning efficiency of the reader is often low. A novel anti-collision algorithm based on jumping-Searching tree is proposed, and the principle of the algorithm is formulated, the procedure and performance of the algorithm is introduced in detail. The algorithm simulation indicates it not only decreases the anti-collision times, but reduces the time delay.