Journal of China Universities of Posts and Telecommunications最新文献_第2页

Hybrid cloud approach for block-level deduplication and searchable encryption in large universe 在大范围内实现块级重复数据消除和可搜索加密的混合云方法

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-10-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60230-9

Liu Zhenhua, Kang Yaqian, Li Chen, Fan Yaqing

{"title":"Hybrid cloud approach for block-level deduplication and searchable encryption in large universe","authors":"Liu Zhenhua, Kang Yaqian, Li Chen, Fan Yaqing","doi":"10.1016/S1005-8885(17)60230-9","DOIUrl":"https://doi.org/10.1016/S1005-8885(17)60230-9","url":null,"abstract":"<div><p>Ciphertext-policy attribute-based searchable encryption (CP-ABSE) can achieve fine-grained access control for data sharing and retrieval, and secure deduplication can save storage space by eliminating duplicate copies. However, there are seldom schemes supporting both searchable encryption and secure deduplication. In this paper, a large universe CP-ABSE scheme supporting secure block-level deduplication are proposed under a hybrid cloud mechanism. In the proposed scheme, after the ciphertext is inserted into bloom filter tree (BFT), private cloud can perform fine-grained deduplication efficiently by matching tags, and public cloud can search efficiently using homomorphic searchable method and keywords matching. Finally, the proposed scheme can achieve privacy under chosen distribution attacks block-level (PRV-CDA-B) secure deduplication and match-concealing (MC) searchable security. Compared with existing schemes, the proposed scheme has the advantage in supporting fine-grained access control, block-level deduplication and efficient search, simultaneously.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"24 5","pages":"Pages 23-34"},"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)60230-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72251618","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

Stateless overlay multicast with in-packet bloom filters 具有数据包内布隆过滤器的无状态覆盖多播

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-10-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60232-2

Tian Shengwen , Wang Jingyu , Yang Hongyong , Cui Guanghai

{"title":"Stateless overlay multicast with in-packet bloom filters","authors":"Tian Shengwen , Wang Jingyu , Yang Hongyong , Cui Guanghai","doi":"10.1016/S1005-8885(17)60232-2","DOIUrl":"https://doi.org/10.1016/S1005-8885(17)60232-2","url":null,"abstract":"<div><p>Due to the difficulty of deploying Internet protocol (IP) multicast on the Internet on a large scale, overlay multicast has been considered as a promising alternative to develop the multicast communication in recent years. However, the existing overlay multicast solutions suffer from high costs to maintain the state information of nodes in the multicast forwarding tree. A stateless overlay multicast scheme is proposed, in which the multicast routing information is encoded by a bloom filter (BF) and encapsulated into the packet header without any need for maintaining the multicast forwarding tree. Our scheme leverages the node heterogeneity and proximity information in the physical topology and hierarchically constructs the transit-stub overlay topology by assigning geometric coordinates to all overlay nodes. More importantly, the scheme uses BF technology to identify the nodes and links of the multicast forwarding tree, which improves the forwarding efficiency and decreases the false-positive forwarding loop. The analytical and simulation results show that the proposal can achieve high forwarding efficiency and good scalability.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"24 5","pages":"Pages 44-52"},"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)60232-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72265834","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

Speaker conversion using kernel non-negative matrix factorization 基于核非负矩阵因子分解的说话人转换

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-10-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60234-6

Xu Qinyu , Lu Guanming , Yan Jingjie , Li Haibo , Cheng Xiao

引用次数: 0

Extraction technique of region of interest from stereoscopic video 立体视频中感兴趣区域的提取技术

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-10-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60235-8

Lü Chaohui, Pan Jiaying

{"title":"Extraction technique of region of interest from stereoscopic video","authors":"Lü Chaohui, Pan Jiaying","doi":"10.1016/S1005-8885(17)60235-8","DOIUrl":"https://doi.org/10.1016/S1005-8885(17)60235-8","url":null,"abstract":"<div><p>A feature fusion approach is presented to extract the region of interest (ROI) from the stereoscopic video. [0]Based on human vision system (HVS), the depth feature, the color feature and the motion feature are chosen as vision features. [0]The algorithm is shown as follows. Firstly, color saliency is calculated on superpixel scale. Color space distribution of the superpixel and the color difference between the superpixel and background pixel are used to describe color saliency and color salient region is detected. Then, the classic visual background extractor (Vibe) algorithm is improved from the update interval and update region of background model. The update interval is adjusted according to the image content. The update region is determined through non-obvious movement region and background point detection. So the motion region of stereoscopic video is extracted using improved Vibe algorithm. The depth salient region is detected by selecting the region with the highest gray value. Finally, three regions are fused into final ROI. Experiment results show that the proposed method can extract ROI from stereoscopic video effectively. In order to further verify the proposed method, stereoscopic video coding application is also carried out on the joint model (JM) encoder with different bit allocation in ROI and the background region.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"24 5","pages":"Pages 68-76"},"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)60235-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72251619","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: 2

Centralized congestion control routing protocol based on multi-metrics for low power and lossy networks 基于多指标的低功耗有损网络集中式拥塞控制路由协议

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-10-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60231-0

Yao Yukun, Liu Jiangbing, Xu Dongliang, Ren Zhi, Hu Qing

{"title":"Centralized congestion control routing protocol based on multi-metrics for low power and lossy networks","authors":"Yao Yukun, Liu Jiangbing, Xu Dongliang, Ren Zhi, Hu Qing","doi":"10.1016/S1005-8885(17)60231-0","DOIUrl":"https://doi.org/10.1016/S1005-8885(17)60231-0","url":null,"abstract":"<div><p>Owing to the unreliability of wireless link and the resource constraints of embedded devices in terms of energy, processing power, and memory size in low power and lossy networks (LLNs), network congestion may occur in an emergency and lead to significant packet loss and end-to-end delay. To mitigate the effect of network congestion, this paper proposes a centralized congestion control routing protocol based on multi-metrics (CCRPM). It combines the residual energy of a node, buffer occupancy rate, wireless link quality, and the current number of sub-nodes for the candidate parent to reduce the probability of network congestion in the process of network construction. In addition, it adopts a centralized way to determine whether the sub-nodes of the congested node need to be switched based on the traffic analysis when network congestion occurs. Theoretical analysis and extensive simulation results show that compared with the existing routing protocol, the performance of CCRPM is improved significantly in reducing the probability of network congestion, prolonging average network lifetime, increasing network throughput, and decreasing end-to-end delay.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"24 5","pages":"Pages 35-43"},"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)60231-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72265832","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: 9

SFD-AGC algorithm with ADC digitalizing bit fully utilized and stable PAR 充分利用ADC数字化位的SFD-AGC算法，标准杆数稳定

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-10-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60228-0

Wang Jie , Hu Xiaoguang , Guan Enyi , Ding Zhushun , Yao Yidong , Li Wen

{"title":"SFD-AGC algorithm with ADC digitalizing bit fully utilized and stable PAR","authors":"Wang Jie , Hu Xiaoguang , Guan Enyi , Ding Zhushun , Yao Yidong , Li Wen","doi":"10.1016/S1005-8885(17)60228-0","DOIUrl":"https://doi.org/10.1016/S1005-8885(17)60228-0","url":null,"abstract":"<div><p>Aiming at making full use of analog to digital converter (ADC) digitalizing bit without oversaturation while keeping peak to average ratio (PAR) stable, this paper puts forward a new segmented full-digital (SFD)-automatic gain control (AGC) algorithm for a new long term evolution (LTE) communication system. Segmented digital gain control strategy is adopted to adjust the gain by only one step based on detected power status. Whether the gain needs to be adjusted is determined by current signal state derived from the change ranges of adjacent root mean square (RMS) of input signal, but not the difference between the power level of current signal and target signal. Software simulation and hardware implementing had been conducted with LTE frequency division dual (FDD) uplink signal and the results indicated that the proposed AGC algorithm can judge power status accurately and hence adjust the gain precisely in one step with a short delay, further, it can make full use of ADC digitalizing bit without oversaturation as well as keeping stable PAR. In addition, the mean error vector magnitude (EVM) was confined less than 1.6% to meet the 3rd generation partnership project (3GPP) standard well.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"24 5","pages":"Pages 8-15"},"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)60228-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72251616","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

New key pre-distribution scheme using symplectic geometry over finite fields for wireless sensor networks 无线传感器网络有限域上辛几何密钥预分配新方案

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-10-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60229-2

Chen Shangdi , Wen Jiejing

引用次数: 2

Dynamic resource allocation in cloud download service 云下载服务中的动态资源分配

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-10-01 Epub Date: 2017-12-12 DOI: 10.1016/S1005-8885(17)60233-4

Tan Xiaoying , Huang Dan , Guo Yuchun , Chen Changjia

引用次数: 10

Efficient closed-form solution for target localization using TDOA measurements in the presence of sensor position errors 在存在传感器位置误差的情况下，使用时差测量进行目标定位的有效闭合形式解决方案

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-08-01 Epub Date: 2017-12-05 DOI: 10.1016/S1005-8885(17)60217-6

Yan Leibing , Zhang Yerong , Lu Yin

{"title":"Efficient closed-form solution for target localization using TDOA measurements in the presence of sensor position errors","authors":"Yan Leibing , Zhang Yerong , Lu Yin","doi":"10.1016/S1005-8885(17)60217-6","DOIUrl":"https://doi.org/10.1016/S1005-8885(17)60217-6","url":null,"abstract":"<div><h3>Abstract</h3><p>An efficient solution for locating a target was proposed, which by using time difference of arrival (TDOA) measurements in the presence of random sensor position errors to increase the accuracy of estimation. The cause of position estimation errors in two-stage weighted least squares (TSWLS) method is analyzed to develop a simple and effective method for improving the localization performance. Specifically, the reference sensor is selected again and the coordinate system is rotated according to preliminary estimated target position by using TSWLS method, and the final position estimation of the target is obtained by using weighted least squares (WLS). The proposed approach exhibits a closed-form and is as efficient as TSWLS method. Simulation results show that the proposed approach yields low estimation bias and improved robustness with increasing sensor position errors and thus can easily achieve the Cramer-Rao lower bound (CRLB) easily and effectively improve the localization accuracy.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"24 4","pages":"Pages 1-9, 15"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(17)60217-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72263780","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

Low-profile microwave lens antenna based on isotropic Huygens' metasurfaces 基于各向同性惠更斯超表面的低剖面微波透镜天线

Journal of China Universities of Posts and Telecommunications Pub Date : 2017-08-01 Epub Date: 2017-12-05 DOI: 10.1016/S1005-8885(17)60218-8

Wang Zhengbin , Wang Haofang , Dong Zhuangli , Wu Zhihang , Zhang Yerong , Zhou Zhipeng

引用次数: 5