Journal of China Universities of Posts and Telecommunications最新文献

Novel high PSRR high-order temperature-compensated subthreshold MOS bandgap reference 新型高PSRR高阶温度补偿亚阈值MOS带隙基准

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-12-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60244-9

Zhou Qianneng , Zhu Ling , Li Hongjuan , Lin Jinzhao , Wang Liangcai , Luo Wei

{"title":"Novel high PSRR high-order temperature-compensated subthreshold MOS bandgap reference","authors":"Zhou Qianneng , Zhu Ling , Li Hongjuan , Lin Jinzhao , Wang Liangcai , Luo Wei","doi":"10.1016/S1005-8885(17)60244-9","DOIUrl":"https://doi.org/10.1016/S1005-8885(17)60244-9","url":null,"abstract":"<div><p>Novel high power supply rejection ratio (PSRR) high-order temperature-compensated subthreshold metal-oxide-semiconductor (MOS) bandgap reference (BGR) is proposed in Semiconductor Manufacturing International Corporation (SMIC) 0.13 μm complementary MOS (CMOS) process. By adopting subthreshold MOS field-effect transistors (MOSFETs) and the piecewise-curvature temperature-compensated technique, the output reference voltage's temperature performance of the subthreshold MOS BGR is effectively improved. The subthreshold MOS BGR achieves high PSRR performance by adopting the technique of pre-regulator. Simulation results show that the temperature coefficient (TC) of the subthreshold MOS BGR is 1.38×10<sup>−6</sup>/°C when temperature is changed from −40 °C to 125 °C with a power supply voltage of 1.2 V. The subthreshold MOS BGR achieves the PSRR of −104.54 dB, −104.54 dB, −104.5 dB, −101.82 dB and −79.92 dB at 10 Hz, 100 Hz, 1 kHz, 10 kHz and 100 kHz respectively.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"24 6","pages":"Pages 74-82"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(17)60244-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72232730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-SPF routing algorithm based on ordered semi-group preference algebra 基于有序半群偏好代数的非SPF路由算法

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-12-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60238-3

Zhang Yongtang , Fan Bo

{"title":"Non-SPF routing algorithm based on ordered semi-group preference algebra","authors":"Zhang Yongtang , Fan Bo","doi":"10.1016/S1005-8885(17)60238-3","DOIUrl":"https://doi.org/10.1016/S1005-8885(17)60238-3","url":null,"abstract":"<div><p>Layer 2 network technology is extending beyond its traditional local area implementation and finding wider acceptance in provider's metropolitan area networks and large-scale cloud data center networks. This is mainly due to its plug-and-play capability and native mobility support. Many efforts have been put to increase the bisection bandwidth in layer 2 network, which has been constrained by the spanning tree protocol (STP) that layer 2 network uses for preventing looping. The recent trend is to incorporate layer 3's routing approach into layer 2 network so that multiple paths can be used for forwarding traffic between any source-destination (S-D) node pair. Equal cost multipath (ECMP) is one such example. However, ECMP may still be limited in generating multiple paths due to its shortest path (lowest cost) requirement. In this paper, we consider a non-shortest-path routing approach, called equal preference multipath (EPMP) based on ordered semi group theory, which can generate more paths than ECMP. In EPMP routing, all the paths with different traditionally-defined costs, such as hops, bandwidth, etc., can be determined equally now and thus they become equal candidate paths. By the comparative tests with ECMP, EPMP routing not only generates more paths, provides 15% higher bisection bandwidth, but also identifies bottleneck links in a hierarchical network when different traffic patterns are applied. EPMP is more flexible in controlling the number and length of multipath generation. Simulation results indicate the effectiveness of the proposed algorithm. It is a good reference for non-blocking running of big datacenter networks.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"24 6","pages":"Pages 14-23"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(17)60238-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72269213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Palm vein recognition method based on fusion of local Gabor histograms 基于局部Gabor直方图融合的手掌静脉识别方法

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-12-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60242-5

Ma Xin, Jing Xiaojun

{"title":"Palm vein recognition method based on fusion of local Gabor histograms","authors":"Ma Xin, Jing Xiaojun","doi":"10.1016/S1005-8885(17)60242-5","DOIUrl":"https://doi.org/10.1016/S1005-8885(17)60242-5","url":null,"abstract":"<div><p>Gabor features have been shown to be effective for palm vein recognition. This paper presents a novel feature representation method, implementing the fusion of local Gabor histograms (FLGH), in order to improve the accuracy of palm vein recognition systems. A new local descriptor called local Gabor principal differences patterns (LGPDP) encodes the Gabor magnitude using the local maximum difference (LMD) operator. The corresponding Gabor phase patterns are encoded by local Gabor exclusive OR (XOR) patterns (LGXP). Fisher's linear discriminant (FLD) method is then implemented to reduce the dimensionality of the feature representation. Low-dimensional Gabor magnitude and phase feature vectors are finally fused to enhance accuracy. Experimental results from Institute of Automation, Chinese Academy of sciences (CASIA) database show that the proposed FLGH method achieves better performance by utilizing score-level fusion. The equal error rate (EER) is 0.08%, which outperforms other conventional palm vein recognition methods (EER range from 2.87% to 0.16%), e.g., the Laplacian palm, minutiae feature, Hessian phase, Eigenvein, local invariant features, mutual foreground local binary patterns (LBP), and multi-sampling feature fusion methods.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"24 6","pages":"Pages 55-66"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(17)60242-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72232732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

Access control scheme with attribute revocation for SWIM SWIM中具有属性撤销的访问控制方案

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-12-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60241-3

Wu Zhijun, Cui Zihan, Wang Caiyun, Lei Jin

引用次数: 5

Measuring web page complexity by analyzing TCP flows and HTTP headers 通过分析TCP流和HTTP头来测量网页复杂性

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-12-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60237-1

Cheng Weiqing , Hu Yangyang , Yin Qiaofeng , Chen Jiajia

{"title":"Measuring web page complexity by analyzing TCP flows and HTTP headers","authors":"Cheng Weiqing , Hu Yangyang , Yin Qiaofeng , Chen Jiajia","doi":"10.1016/S1005-8885(17)60237-1","DOIUrl":"https://doi.org/10.1016/S1005-8885(17)60237-1","url":null,"abstract":"<div><p>To understand website complexity deeply, a web page complexity measurement system is developed. The system measures the complexity of a web page at two levels: transport-level and content-level, using a packet trace-based approach rather than server or client logs. Packet traces surpass others in the amount of information contained. Quantitative analyses show that different categories of web pages have different complexity characteristics. Experimental results show that a news web page usually loads much more elements at more accessing levels from much more web servers within diverse administrative domains over much more concurrent transmission control protocol (TCP) flows. About more than half of education pages each only involve a few logical servers, where most of elements of a web page are fetched only from one or two logical servers. The number of content types for web game traffic after login is usually least. The system can help web page designers to design more efficient web pages, and help researchers or Internet users to know communication details.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"24 6","pages":"Pages 1-13"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(17)60237-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72269214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Anomaly detection in smart grid based on encoder-decoder framework with recurrent neural network 基于递归神经网络编解码器框架的智能电网异常检测

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-12-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60243-7

Zheng Fengming , Li Shufang , Guo Zhimin , Wu Bo , Tian Shiming , Pan Mingming

{"title":"Anomaly detection in smart grid based on encoder-decoder framework with recurrent neural network","authors":"Zheng Fengming , Li Shufang , Guo Zhimin , Wu Bo , Tian Shiming , Pan Mingming","doi":"10.1016/S1005-8885(17)60243-7","DOIUrl":"https://doi.org/10.1016/S1005-8885(17)60243-7","url":null,"abstract":"<div><p>Anomaly detection in smart grid is critical to enhance the reliability of power systems. Excessive manpower has to be involved in analyzing the measurement data collected from intelligent motoring devices while performance of anomaly detection is still not satisfactory. This is mainly because the inherent spatio-temporality and multi-dimensionality of the measurement data cannot be easily captured. In this paper, we propose an anomaly detection model based on encoder-decoder framework with recurrent neural network (RNN). In the model, an input time series is reconstructed and an anomaly can be detected by an unexpected high reconstruction error. Both Manhattan distance and the edit distance are used to evaluate the difference between an input time series and its reconstructed one. Finally, we validate the proposed model by using power demand data from University of California, Riverside (UCR) time series classification archive and IEEE 39 bus system simulation data. Results from the analysis demonstrate that the proposed encoder-decoder framework is able to successfully capture anomalies with a precision higher than 95%.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"24 6","pages":"Pages 67-73"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(17)60243-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72232731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 25

Effect of non-spherical atmospheric charged particles and atmospheric visibility on performance of satellite-ground quantum link and parameters simulation 非球形大气带电粒子和大气能见度对星地量子链路性能的影响及参数模拟

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-12-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60240-1

Shi Li , Nie Min , Yang Guang , Pei Changxing

{"title":"Effect of non-spherical atmospheric charged particles and atmospheric visibility on performance of satellite-ground quantum link and parameters simulation","authors":"Shi Li , Nie Min , Yang Guang , Pei Changxing","doi":"10.1016/S1005-8885(17)60240-1","DOIUrl":"https://doi.org/10.1016/S1005-8885(17)60240-1","url":null,"abstract":"<div><p>In order to study the relationship between the non-spherical atmospheric charged particles and satellite-ground quantum links attenuation. The relationship among the particle concentration, equivalent radius, charge density of the charged particle, the attenuation coefficient and entanglement of the satellite-ground quantum link can be established first according to the extinction cross section and spectral distribution function of the non-spherical atmospheric charged particles. The quantitative relationship between atmospheric visibility and communication fidelity of satellite-ground quantum link were analyzed then. Simulation results show that the ellipsoid, Chebyshev atmospheric charged particle influences on attenuation of the satellite-ground quantum link increase progressively. When the equivalent particle radius is 0.2 μm and the particle concentration is 50 μg/m<sup>3</sup>, the attenuation coefficient and entanglement of the satellite-ground quantum link is 9.21 dB/km, 11.46 dB/km and 0.453, 0.421 respectively; When the atmospheric visibility reduces from 8 km to 2 km, the communication fidelity of satellite-ground quantum link decreases from 0.52 to 0.08. It is shown that the non-spherical atmospheric charged particles and atmospheric visibility influence greatly on the performance of the satellite-ground quantum link communication system. Therefore, it is necessary to adjust the parameters of the quantum-satellite communication system according to the visibility values of the atmosphere and the shapes of the charged particles in the atmosphere to improve reliability of the satellite-ground quantum link.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"24 6","pages":"Pages 39-48"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(17)60240-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72232729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Survey of outdoor and indoor architecture design in TVWS networks TVWS网络中室内外建筑设计综述

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-12-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60239-5

Yang Jingmin , Zhang Wenjie , Zou Fumin

引用次数: 2

Ant colony optimization based load balancing routing and wavelength assignment for optical satellite networks 基于蚁群优化的光卫星网络负载均衡路由和波长分配

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-10-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60236-X

Wen Guoli , Zhang Qi , Wang Houtian , Tian Qinghua , Zhang Wei , Xin Xiangjun

{"title":"Ant colony optimization based load balancing routing and wavelength assignment for optical satellite networks","authors":"Wen Guoli , Zhang Qi , Wang Houtian , Tian Qinghua , Zhang Wei , Xin Xiangjun","doi":"10.1016/S1005-8885(17)60236-X","DOIUrl":"https://doi.org/10.1016/S1005-8885(17)60236-X","url":null,"abstract":"<div><p>An ant colony optimization (ACO) based load balancing routing and wavelength assignment (RWA) algorithm (ALRWA) was put forward for the sake of achieving a fairy load balancing over the entire optical satellite networks. A multi-objective optimization model is established considering the characteristic of global traffic distribution. This not only employs the traffic intensity to modify the light path cost, but also monitors the wavelength utilization of optical inter-satellite links (ISLs). Then an ACO algorithm is utilized to solve this model, leading to finding an optimal light path for every connection request. The optimal light path has the minimum light path cost under satisfying the constraints of wavelength utilization, transmission delay and wavelength-continuity. Simulation results show that ALRWA performs well in blocking probability and realizes efficient load balancing. Meanwhile, the average transmission delay can meet the basic requirement of real-time business transmission.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"24 5","pages":"Pages 77-86"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(17)60236-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72265835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Performance analysis of LTE-U coexistence network with WiFi using queueing model 基于排队模型的LTE-U WiFi共存网络性能分析

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-10-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60227-9

Hu Zhiqun, Lu Zhaoming, Lin Shangjuan, Wen Xiangming, Xu Hen

{"title":"Performance analysis of LTE-U coexistence network with WiFi using queueing model","authors":"Hu Zhiqun, Lu Zhaoming, Lin Shangjuan, Wen Xiangming, Xu Hen","doi":"10.1016/S1005-8885(17)60227-9","DOIUrl":"https://doi.org/10.1016/S1005-8885(17)60227-9","url":null,"abstract":"<div><p>The unforeseen mobile data explosion as well as the scarce of spectrum resource pose a major challenge to the performance of today's cellular networks which are in urgent need of novel solutions to handle such voluminous mobile data. Long term evolution-unlicensed (LTE-U), which extends the LTE standard operating on the unlicensed band, has been proposed to improve system throughput. In LTE-U system, arriving users will contend the unlicensed spectrum resource with wireless fidelity (WiFi) users to transmit data information. Nevertheless, there is no clear consensus as to the benefits of transmission using unlicensed bands for LTE users. To this end, in this paper an analytical model is presented based on a queue system to understand the performance achieved by unlicensed based LTE system taking quality of services (QoS) and LTE-U users' behaviors into account. To obtain the stead-state solutions of the queue system, a matrix geometric method is used to solve it. Then, the average delay and utilization of unlicensed band for the LTE-U users is derived by using the queuing model. The performance of LTE-U coexistence is evaluated with WiFi using the proposed model and provide some initial insights as to the advantage of LTE-U in practice.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"24 5","pages":"Pages 1-7"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(17)60227-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72251615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0