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In this paper, we treat the pricing of the cloud resources as an option pricing problem. The pricing of the Reserved scheme can be solved as a European option problem and the pricing of the On-Demand Scheme can be solved as an American option problem. We adopt the method of Trinomial tree to resolve the European option problem and the American option problem. The model we proposed can calculate the...
Aiming to resolve insufficiency of existing Energy-Saving (ES) methods in heterogeneous network, a novel self-organizing ES mechanism to improve energy efficiency suitable for heterogeneous networks is proposed. In the mechanism, we come up with the self-organizing procedures, the traffic model, and an optimizing objective model. The mechanism is then simulated under an urban LTE scenario with 7 macro...
Cell outage is the total loss of radio services in the coverage area of a cell. Aiming at mitigating the coverage problems caused by a sudden outage, this paper proposed a concrete cell outage compensation scheme based on immune algorithm. Taking into account the two objectives, coverage and quality, the scheme constructs a mathematical model which adjusts the uplink target received power in surrounding...
In this paper, we proposed a compact near-field and far-field RFID reader antenna with a dimension of 50 mm × 50 mm × 0.8 mm in the UHF band. The fabricated antenna printed on a FR4 substrate operates from 915 to 935 MHz with reflection coefficient less than −10dB, covering the China UHF band. The strong and uniform magnetic field is excited by magnetic dipole source. The measured reading distance...
Automatic meter reading (AMR) system is the important components of smart grid. State Grid Corporation of China (SGCC) plan to established an AMR which can cover 200 million energy consumer till 2015, this system can help SGCC to realize the target “Full coverage, collection, full-fee control” in its operational region, the reliable communication channel construction is a premise to achieve this goal...
A system of transmission line tower anti-theft monitoring based on video difference analysis is designed in this paper. Gaussian Mixture Model is firstly used to create dynamic background model. Then the moving objects can be extracted effectively with the background subtraction. SVM is used to detect moving targets on the quick identification. Finally, Based on regions and characteristics method,the...
For the sake of the increase of energy consumption, the emission of carbide can't be negligible. In this paper, we propose a mathematical model which adjusts the radius of base station, to figure out the problem of energy saving, while the quality of services such as the traffic volume of each base station and the service area should be satisfied. For the model, we use ant colony algorithm as a practical...
To solve the abnormal coverage problems caused by unreasonable network parameter settings more effectively, an automated coverage optimization scheme based on downtilt-adjustment of base stations in wireless access networks is proposed. After detecting and analyzing the abnormal coverage situation, simulated annealing algorithm is adopted by the scheme to figure out an optimal downtilt-adjustment...
An acousto-optic Q-switched pulse fiber laser was presented, and the output power of 20.1W was obtained by using the one-stage Ytterbium-doped double-cladding fiber amplification The repetition frequency of the pulse fiber laser was tunable in the range of 20–80 kHz. By adjusting the rise time of the acousto-optic modulator, we obtained the pulse output with pulse width of 58ns and peak power of 17...
A gain-switched Ytterbium-doped double-cladding fiber laser pumped by a laser diode was presented. A diode laser with wavelength of 966nm and output power of 25W was adopted as the pump source. 11-meter long Yb-doped double-cladding fiber was used as gain medium. The output power and the pulse waveform of the laser were measured under different pulse width and different repetition frequency. The output...
Design of a passive multifaceted phased array for hemispherical coverage is proposed in this paper, which has the advantages of low cost and easy fabrication. The multifaceted array consists of seven passive planar phased sub-arrays accommodated on the sides of a pyramidal frustum. Simulated results indicate that the multifaceted phased array achieves realized gains of over 10dBi within 86.6% and...
A novel circularly-polarized antenna with wide bandwidth and beamwidth is presented. The antenna is composed of four compact linearly-polarized elements, which are sequentially rotated with a phase difference of 90° and fed by a four-way microstrip feed network. The antenna achieves an impedance bandwidth (S11<−10dB) of 18%, with the HP (Half-Power) and 3dB-AR (Axial Ratio) -beamwidth of about...
In this paper, a wideband dual-frequency dual-polarized microstrip array antenna with a high gain is proposed for the ku-band satellite communication application. The antenna has a vertical polarization for transmitting band and a horizontal polarization for receiving band. Symmetry feed, series feed and parallel feed techniques are together used to design array antenna. The experimental results show...
When regional traffic is low, one key issue of ESM (Energy-Saving Management) in cellular networks is how to sleep several BSs (Base Stations) and meanwhile guaranteeing regional coverage and service quality. Current ESM methods lack efficient regional coverage compensation method and accurate evaluation model for ESM algorithms. This paper proposes a novel ESM mechanism to resolve these problems...
Cell Outage Management (COM) is a functionality aiming to automatically detect and mitigate outages that occur in radio networks due to unexpected failures. In this paper, we assume that future Radio Access Networks (RAN) can autonomously detect an outage based on measurements, then we propose a Genetic Algorithm (GA) based mechanism for Cell Outage Compensation (COC). COC is achieved by a GA- based...
Energy issue of cellular access network has drawn much attention in the recent years. In this paper, we propose a Novel Energy-Saving Cell Selection Mechanism (ESCSM) including the energy-saving triggering conditions determination and a regional cell selection algorithm based on traffic. ESCSM selects the BSes which can be switched off without any negative effects to the radio coverage and service...
The flat architecture becomes the evolution direction of the next generation Mobile Communication Network. It can also lighten the load on the core network effectively. The LIPA (Local IP Access) and SIPTO (Selected IP Traffic Offload) proposed by 3GPP are the typical technologies to implement the flat traffic offload in the user side. Current offload mechanisms for LIPA/SIPTO are either costly for...
With the development of Mobile Communication Network, flat network architecture has become a study focus. The flat traffic transmission can effectively lighten the burden on the operators' core network. The LIPA (Local IP Access) and SIPTO (Selected IP Traffic Offload) proposed by 3GPP are the typical technologies in the horizontal structure evolution. Current offload policy for LIPA&SIPTO either...
This paper developed a novel power harmonic analyzer system based on ARM and FPGA, aiming at reducing the spectrum leakage caused by fixed-frequency sampling. It focused on the design of system architecture, preprocessing circuit, digital multiplier circuit based on FPGA. The comparison of harmonics analysis by using fixed-frequency and frequency tracking samples show that the latter can reduce spectrum...
Using two pairs of specific primers, DNA fragments containing the promoter PpsbA of psbA gene and terminator TpsbA of psbA gene, were obtained by PCR from Beta vulgaris. L chloroplast genomic DNA. Sequence analyzing results showed that the functional domains such as −35 domain, −10 domain and the translation control sequence motif in the cloned promoters the highly conserved to Nicotiana tabacum....
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