Journal of China Universities of Posts and Telecommunications最新文献_第10页

Jitter analysis of real-time services in IEEE 802.15.4 WSNs and wired IP concatenated networks IEEE 802.15.4无线传感器网络和有线IP级联网络中实时服务的抖动分析

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-08-01 Epub Date: 2016-09-15 DOI: 10.1016/S1005-8885(16)60039-0

Na Fei, Chi Xuefen, Dong Wen, Yu Haifeng

{"title":"Jitter analysis of real-time services in IEEE 802.15.4 WSNs and wired IP concatenated networks","authors":"Na Fei, Chi Xuefen, Dong Wen, Yu Haifeng","doi":"10.1016/S1005-8885(16)60039-0","DOIUrl":"https://doi.org/10.1016/S1005-8885(16)60039-0","url":null,"abstract":"<div><p>It is challenging and significant to explore the impacts of non-real-time services on real-time services from the perspective of jitter. Most of current researches on jitter made too many mathematical hypotheses on networks and traffic. This paper puts forward a tandem queuing model to characterize the real communication scenario where heterogeneous services are served by IEEE 802.15.4 wireless sensor networks (WSNs), and then the packets served successfully are fed to Internet protocol (IP) networks. By analyzing the contention access processes in IEEE 802.15.4 WSNs, the authors derive the departure processes of the two types of services, i.e., the arrival processes of IP networks. The IP network is modeled as a queuing system, in which the real-time service is forwarded accompanied by the non-real-time service. Investigating the jitter of real-time services is intractable. Therefore, this paper abstracts this problem as a dynamic queuing system evolving on a dynamic time interval. Referring the transient analysis method (TAM), this paper obtains the queue length in a random time interval which is scaled by the arrival of real-time services. Queue length evolution is closely connected with the jitter. Benefiting from the derivation in probability generation domain, the jitter of real-time services is obtained.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"23 4","pages":"Pages 1-8"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(16)60039-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72230617","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

High-throughput low-delay MAC protocol for TeraHertz ultra-high data-rate wireless networks 用于太赫兹超高数据速率无线网络的高吞吐量低延迟MAC协议

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-08-01 Epub Date: 2016-09-15 DOI: 10.1016/S1005-8885(16)60041-9

Cao Jianling, Wang Min, Chen Cong, Ren Zhi

引用次数: 6

Attribute-based signatures on lattices 晶格上基于属性的签名

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-08-01 Epub Date: 2016-09-15 DOI: 10.1016/S1005-8885(16)60049-3

Xie Jia , Hu Yupu , Gao Juntao , Gao Wen , Li Xuelian

{"title":"Attribute-based signatures on lattices","authors":"Xie Jia , Hu Yupu , Gao Juntao , Gao Wen , Li Xuelian","doi":"10.1016/S1005-8885(16)60049-3","DOIUrl":"https://doi.org/10.1016/S1005-8885(16)60049-3","url":null,"abstract":"<div><p>Because of its wide application in anonymous authentication and attribute-based messaging, the attribute-based signature scheme has attracted the public attention since it was proposed in 2008. However, most of the existing attribute-based signature schemes are no longer secure in quantum era. Fortunately, lattice-based cryptography offers the hope of withstanding quantum computers. And lattices has elevated it to the status of a promising potential alternative to cryptography based on discrete log and factoring, owing to implementation simplicity, provable security reductions and quantum-immune. In this paper, the first lattice attribute-based signature scheme in random oracle model is proposed, which is proved existential unforgeability and perfect privacy. Compared with the current attribute-based signature schemes, our new attribute-based signature scheme can resist quantum attacks and has much shorter public-key size and signature size. Furthermore, this scheme is extended into an attribute-based signature scheme on number theory research unit (NTRU) lattice, which is also secure even in quantum era and has much higher efficiency than the former.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"23 4","pages":"Pages 83-90"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(16)60049-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72290122","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: 3

Joint model of user check-in activities for point-of-interest recommendation 兴趣点推荐的用户签到活动联合模型

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-08-01 Epub Date: 2016-09-15 DOI: 10.1016/S1005-8885(16)60042-0

Ren Xingyi, Song Meina, E Haihong, Song Junde

{"title":"Joint model of user check-in activities for point-of-interest recommendation","authors":"Ren Xingyi, Song Meina, E Haihong, Song Junde","doi":"10.1016/S1005-8885(16)60042-0","DOIUrl":"https://doi.org/10.1016/S1005-8885(16)60042-0","url":null,"abstract":"<div><p>With the rapid development of location-based networks, point-of-interest (POI) recommendation has become an important means to help people discover interesting and attractive locations, especially when users travel out of town. However, because users only check-in interaction is highly sparse, which creates a big challenge for POI recommendation. To tackle this challenge, we propose a joint probabilistic generative model called geographical temporal social content popularity (GTSCP) to imitate user check-in activities in a process of decision making, which effectively integrates the geographical influence, temporal effect, social correlation, content information and popularity impact factors to overcome the data sparsity, especially for out-of-town users. Our proposed the GTSCP supports two recommendation scenarios in a joint model, i.e., home-town recommendation and out-of-town recommendation. Experimental results show that GTSCP achieves significantly superior recommendation quality compared to other state-of-the-art POI recommendation techniques.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"23 4","pages":"Pages 25-36"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(16)60042-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72290135","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

Congestion warning method based on the Internet of vehicles and community discovery of complex networks 基于车联网的拥堵预警方法与复杂网络的社区发现

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-08-01 Epub Date: 2016-09-15 DOI: 10.1016/S1005-8885(16)60043-2

Zhao Ting, Wang Bin, Gao Qi

{"title":"Congestion warning method based on the Internet of vehicles and community discovery of complex networks","authors":"Zhao Ting, Wang Bin, Gao Qi","doi":"10.1016/S1005-8885(16)60043-2","DOIUrl":"https://doi.org/10.1016/S1005-8885(16)60043-2","url":null,"abstract":"<div><p>The traffic congestion occurs frequently in urban areas, while most existing solutions only take effects after congesting. In this paper, a congestion warning method is proposed based on the Internet of vehicles (IOV) and community discovery of complex networks. The communities in complex network model of traffic flow reflect the local aggregation of vehicles in the traffic system, and it is used to predict the upcoming congestion. The real-time information of vehicles on the roads is obtained from the IOV, which includes the locations, speeds and orientations of vehicles. Then the vehicles are mapped into nodes of network, the links between nodes are determined by the correlations between vehicles in terms of location and speed. The complex network model of traffic flow is hereby established. The communities in this complex network are discovered by fast Newman (FN) algorithm, and the congestion warnings are generated according to the communities selected by scale and density. This method can detect the tendency of traffic aggregation and provide warnings before congestion occurs. The simulations show that the method proposed in this paper is effective and practicable, and makes it possible to take action before traffic congestion.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"23 4","pages":"Pages 37-45"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(16)60043-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72230619","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: 7

Non-orthogonal pilot pattern for sparse channel estimation in large-scale MIMO-OFDM system 用于大规模MIMO-OFDM系统稀疏信道估计的非正交导频模式

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-08-01 Epub Date: 2016-09-15 DOI: 10.1016/S1005-8885(16)60046-8

Xu Chao, Zhang Jianhua, Yin Changchuan

引用次数: 2

Novel DTD and VAD assisted voice detection algorithm for VoIP systems 一种新的基于DTD和VAD的VoIP语音检测算法

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-08-01 Epub Date: 2016-09-15 DOI: 10.1016/S1005-8885(16)60040-7

Ming Meng, Wang Ke, Ji Hong

{"title":"Novel DTD and VAD assisted voice detection algorithm for VoIP systems","authors":"Ming Meng, Wang Ke, Ji Hong","doi":"10.1016/S1005-8885(16)60040-7","DOIUrl":"https://doi.org/10.1016/S1005-8885(16)60040-7","url":null,"abstract":"<div><p>Echo cancellation plays an important role in current Internet protocol (IP) based voice interactive systems. Voice state detection is an essential part in echo cancellation. It mainly comprises two parts: double talk detection (DTD) and voice activity detection (VAD). DTD is used to detect doubletalk and prevent filter divergence in the presence of near-end speech, and VAD is used to determine the near-end voice activity and output silence indicator when near-end is silent. However, DTD straightforwardly proceeded may mistakenly declare double talk under double silent condition, coefficients update under the far-end silence condition may lead to filter divergence, and current VAD algorithms may misjudge the residual echo from the near end to be far-end voice. Therefore, a voice detection algorithm combining DTD and far-end VAD is proposed. DTD is implemented when VAD declares far-end speech, filtering and coefficients update will be halted when VAD declares far-end silence, and the far-end VAD adopted is multi-feature VAD based on short-time energy and correlation. The new algorithm can improve the accuracy of DTD, prevent filter divergence, and exclude the circumstance that far-end signal only contains residual echo from near end. Actual test results show that the voice state decision of the new algorithm is accurate, and the performance of echo cancellation is improved.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"23 4","pages":"Pages 9-16, 76"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(16)60040-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72290132","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

Design of hexagon microstrip antenna for vehicle-to-vehicle communication 车载通信用六边形微带天线的设计

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-08-01 Epub Date: 2016-09-15 DOI: 10.1016/S1005-8885(16)60047-X

Hao Honggang, Li Jiayu, Huang Daili, Luo Wei

引用次数: 18

Energy aware hierarchical cluster-based routing protocol for WSNs 基于能量感知的分层集群无线传感器网络路由协议

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-08-01 Epub Date: 2016-09-15 DOI: 10.1016/S1005-8885(16)60044-4

Wang Ke, Ou Yangrui, Ji Hong, Zhang Heli, Li Xi

{"title":"Energy aware hierarchical cluster-based routing protocol for WSNs","authors":"Wang Ke, Ou Yangrui, Ji Hong, Zhang Heli, Li Xi","doi":"10.1016/S1005-8885(16)60044-4","DOIUrl":"https://doi.org/10.1016/S1005-8885(16)60044-4","url":null,"abstract":"<div><p>Wireless sensor networks (WSNs) are emerging as essential and popular ways of providing pervasive computing environments for various applications. Unbalanced energy consumption is an inherent problem in WSNs, characterized by multi-hop routing and a many-to-one traffic pattern. This uneven energy dissipation can significantly reduce network lifetime. In multi-hop sensor networks, information obtained by the monitoring nodes need to be routed to the sinks, the energy consumption rate per unit information transmission depends on the choice of the next hop node. In an energy-aware routing approach, most proposed algorithms aim at minimizing the total energy consumption or maximizing network lifetime. In this paper, we propose a novel energy aware hierarchical cluster-based (NEAHC) routing protocol with two goals: minimizing the total energy consumption and ensuring fairness of energy consumption between nodes. We model the relay node choosing problem as a nonlinear programming problem and use the property of convex function to find the optimal solution. We also evaluate the proposed algorithm via simulations at the end of this paper.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"23 4","pages":"Pages 46-52"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(16)60044-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72230620","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: 76

Reduced frame set on wireless distorted video for quality assessment 用于质量评估的无线失真视频缩减帧集

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-08-01 Epub Date: 2016-09-15 DOI: 10.1016/S1005-8885(16)60048-1

Shao Hua , Wen Xiangming , Lu Zhaoming , Chen Yawen , Lu Jingyu

引用次数: 0