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ENERGY-SAVING SCHEDULING FOR LTE MULTICAST SERVICES

Journal of Electronics(China) 2013年第5期30卷 423-429页

作者： Deng Keke Wang bin Guo Hui Wang Wennai College of Telecommunications & Information Engineering Nanjing University of Posts and Telecommuni-cations Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications

In the Long Term Evolution(LTE)downlink multicast scheduling,Base Station(BS)usually allocates transmit power equally among all Resource Blocks(RBs),it may cause the waste of transmit *** avoid it,this paper put forward a new algorithm for LTE multicast downlink scheduling called the Energy-saving based Inter-group Proportional Fair(EIPF).The basic idea of EIPF is to calculate an appropriate transmitting power for each group according to its data rate respectively,and then follow the inter-group proportional fair principle to allocate RBs among multicast *** results of EIPF simulation show that the proposed algorithm not only can reduce the transmit power of BS effectively but also improve the utilization rate of energy.

关键词： Long Term Evolution(LTE) Downlink scheduling Multicast Energy-saving based Inter-group Proportional Fair(EIPF)

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ENERGY EFFICIENT DISTRIBUTED STEGANOGRAPHY FOR SECURE communication IN wireless MULTIMEDIA sensor networkS

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Journal of Electronics(China) 2013年第1期30卷 9-16页

作者： Lin Qiaomin Wang Ruchuan Ye Ning Wang Zhongqin College of Computer Nanjing University of Posts and Telecommunications Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Key Lab of Broadband Wireless Communication and Sensor Network Technology (Nanjing University of Posts and Telecommunications) Ministry of Education Department of Information Science Nanjing College for Population Management

A secure communication mechanism is necessary in the applications of wireless Multimedia sensor networks (WMSNs), which is more vulnerable to security attacks due to the presence of multimedia data. Additionally, given the limited technological resources (in term of energy, computation, bandwidth, and storage) of sensor nodes, security and privacy policies have to be combined with energy-aware algorithms and distributed processing of multimedia contents in WMSNs. To solve these problems in this paper, an energy efficient distributed steganography scheme, which combines steganography technique with the concept of distributed computing, is proposed for secure communication in WMSNs. The simulation results show that the proposed method can achieve considerable energy efficiency while assuring the communication security simultaneously.

关键词： Discrete Wavelet Transform （DWT） Distributed steganography Energy efficiency Perfect hash wireless Multimedia sensor networks （WMSNs）

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Appearance model based moving object matching across disjoint camera views

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2nd International Conference on Opto-Electronics Engineering and Materials Research, OEMR 2013

作者： Yu, Kong Shuai Hu, Dong Education Ministry's Key Lab of Broadband Wireless Communication and Sensor Network Technology The key lab of image processing and image communications of Jiangsu Province Nanjing University of Posts and Telecom Nanjing 210003 China

ISBN: (纸本)9783037857731

A new object tracking scheme for multi-camera surveillance with non-overlapping views is proposed in this paper. Brightness transfer function (BTF) is used to establish relative appearance correspondence between different views. Mixtures of probabilistic principal component analysis (MPPCA) is incooperated to learn the subspace of brightness transfer function with the concern to deal with multiple different brightness areas in a scene. The incremental major color spectrum histogram (IMCSH) is used as similarity measure for reliable matching. Experimental results with real world videos show the effectiveness of the proposed algorithm. © (2013) Trans Tech Publications, Switzerland.

关键词： Luminance

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Research on moving object detection based on the Bayesian theory

Research on moving object detection based on the Bayesian th...

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作者： Hu, D. Liu, X. Education Ministry's Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications China Jiangsu Province's Key Lab of Image Procession and Image Communications Nanjing University of Posts and Telecommunications China

ISBN: (纸本)9781845648282

For effective and efficient detection of moving objects from complex surveillance scenarios, a novel integrated object detection scheme based on clustering and Bayesian theory is proposed in this paper. The algorithm conducts clustering analysis in the time domain as the pre-segmentation step for later Bayesian judgment processing. Furthermore, temporal differential image was used to classify dynamical and static pixels, which were then used to direct the Bayesian judgment with proper models. The clustering processing reduced the number of the mixture models, which in turn, reduced the computational complexity while ensuring accurate moving object detection. Simulation results show that the proposed scheme well exploited the temporal correlation of the video sequences and the accuracy of the detected objects can be improved by nearly 20% compared to the typical Gaussian mixture modeling algorithm. © 2014 WIT Press.

关键词： Object detection

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Object detection by clustering-based nonparametric kernel density estimation

Object detection by clustering-based nonparametric kernel de...

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作者： Hu, D. Hu, J. Education Ministry's Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications China Jiangsu Province's Key Lab of Image Procession and Image Communications Nanjing University of Posts and Telecommunications China

ISBN: (纸本)9781845648282

Nonparametric model is one of the popular ones for background modeling for its ability to adapt to changes quickly in dynamic environment and enable very sensitive detection of moving objects. However, the method is too complex and computationally inefficient to real-time application. In this paper, a fast and efficient scheme for moving object detection by nonparametric background modeling was proposed, whereas the background was modeled combining clustering theory to eliminate the large amount of redundant information and noise pixels in background modeling stage. Moreover, adaptive background and temporal differencing was used to filter out unchanged background pixels, thus enabling an additional reduction in computational requirements and improving the detection results. Besides, RGB color components were substituted by chromaticity coordinates to suppress shadow effects. Experimental results demonstrated the effectiveness of the proposed algorithm. © 2014 WIT Press.

关键词： Object detection

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AN ID-based online/offline signature scheme without random oracles for wireless sensor networks

AN ID-based online/offline signature scheme without random o...

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作者： Wang, Zhiwei Chen, Wei College of Computer Nanjing University of Posts and Telecommunications Ministry of Education Jiangsu Province Nanjing 210003 Jiangsu China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing 210003 Jiangsu China Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Jiangsu Province Nanjing 210003 Jiangsu China

Online/offline signature schemes allow one to quickly compute a digital signature from a precomputed coupon. In this paper, we present an ID-based online/offline signature for wireless sensor networks (WSNs), which is based on Hohenberger' RSA signature (Crypto 09). We argue that due to significant reduction in costs of computation and storage, our scheme is particularly suitable for the WSNs environment with severely constrained resources. Our scheme can be proved secure under the factoring assumption without random oracles. © 2012 Springer-Verlag London Limited.

关键词： wireless sensor networks

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Energy-efficient multi-hop routing algorithm based on LEACH

Energy-efficient multi-hop routing algorithm based on LEACH

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6th China Conference of wireless sensor networks, CWSN 2012

作者： Yang, He Xu, Jia Wang, Ruchuan Qian, Liyang College of Computer Nanjing University of Posts and Telecommunications Nanjing 210003 China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing University of Posts and Telecommunications Nanjing 210003 China Key Lab. of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications Nanjing 210003 China

ISBN: (纸本)9783642362514

In order to reduce network energy consumption and prolong the lifetime of wireless sensor networks, this paper improves the LEACH to an energy efficient multi-hop routing algorithm. LEACH in the cluster creation, data transmission, the update phase of the cluster was modified in proposed algorithm. The algorithm updates the cluster head reasonably and adjusts the structure of the cluster to reduce the energy consumption in cluster establishment phrase. In data transmission, it lowers energy consumption by inter-cluster and intra-cluster multi-hop transmission. The simulation runs the algorithm on NS2. The results show that the new algorithm's effectiveness in reducing energy consumption by comparing it with LEACH, LEACH-C,DEEUC. © 2013 Springer-Verlag.

关键词： Routing algorithms

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Compressive fault-tolerance network coding

Compressive fault-tolerance network coding

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2013 IEEE International Conference on Signal Processing, communications and Computing, ICSPCC 2013

作者： Chen, Siguang Wu, Meng Key Lab of Broadband Wireless Communication and Sensor Network Technology of Ministry of Education Nanjing University of Posts and Telecommunications Nanjing China College of Telecommunications and Information Engineering Nanjing University of Posts and Telecommunications Nanjing China

ISBN: (纸本)9781479910274

Because many signals are correlated over temporal domain, this paper proposes a compressive fault telorance network coding scheme for exploring the temporal correlation of signals. This scheme overcomes the drawbacks of network coding theory by injecting the compressed sensing theory into network coding, i.e., the scheme possesses well compression gain. Meanwhile, it can tolerate finite errors and reconstruct the original information with low distortion when the rank of error matrix (induced by errors) is lying in a reasonable bound. Finally, the performance analysis shows that the compressed sensing-based network coding scheme outperforms the conventional network coding scheme with significant improvement in robustness and performance. © 2013 IEEE.

关键词： Fault tolerance

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Mobile agent based coding aware multipath routing for wireless sensor network

Mobile agent based coding aware multipath routing for wirele...

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6th China Conference of wireless sensor networks, CWSN 2012

作者： Shao, Xing Wang, Ruchuan Lin, Qiaomin Huang, Haiping College of Computer Nanjing University of Posts and Telecommunications XinMoFan Road.66 210003 Nanjing China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks XinMoFan Road.66 210003 Nanjing China Key Lab. of Broadband Wireless Communication and Sensor Network Technology XinMoFan Road.66 210003 Nanjing China

ISBN: (纸本)9783642362514

This paper presents an Mobile Agent based Coding Aware Routing (MA-CAMR) for wireless sensor network, which exploits mobile agent to discovery the routing and coding opportunities, reducing complexity of node design. Besides, the general network coding condition of two cross flows is proposed for coding opportunity discovery. In addition, a novel routing metric, Coding and Energy Aware Routing Metric (CEARM) is proposed, which considers the coding gain, the load and energy of node. MA-CAMR exploits multipath routing and CEARM to balance the network load and energy consumption. Simulation results demonstrate that MA-CAMR could balance network load and energy consumption, reduce energy consumption, and prolong network lifetime. © 2013 Springer-Verlag.

关键词： Mobile agents

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A dynamic web services selection algorithm based on trust model for grid environment

A dynamic web services selection algorithm based on trust mo...

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6th China Conference of wireless sensor networks, CWSN 2012

作者： Zhang, Lin Liu, Zhengbang Wang, Ruchuan Wang, Haiyan College of Computer Nanjing University of Posts and Telecommunications Jiangsu Province Nanjing 210003 China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing University of Posts and Telecommunications Jiangsu Province Nanjing 210003 China Key Lab. of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications Jiangsu Province Nanjing 210003 China

ISBN: (纸本)9783642362514

In order to find the service nodes, which the users are satisfied with, in a high speed and efficiency in open network environment, a new grid-oriented multi-level service selection model is proposed, which is based on the concept of user-similarity group. On this condition, direct trust calculation based on time decay is given and fine-grained recommendation trust calculation is studied, which can distinguish the ability of honesty. In addition, based on activity level of nodes, dynamic weight-allocation method is proposed, which can make the prediction results be closer to the fact. After job-interaction, the update algorithm about honesty ability of recommendation nodes is researched, which will provide more reasonable and reliable reference for the next prediction. Simulation results show that the service selection model and trust calculation methods are reasonable and accurate. © 2013 Springer-Verlag.

关键词： Grid computing

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