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International Conference on Anti-Cybercrime (ICACC)

作者： Mehak Basharat Waleed Ejaz Syed Hassan Ahmed Next Generation Wireless Networks Virtual Lab Toronto Canada Department of Electrical & Computer Engineering Queen's University Kivngston Canada School of Computer Science & Engineering Kyungpook National University Daegu Republic of Korea

Recently cognitive radio technology gets attention to enhance the performance of smart grid communication networks. In this paper, we present a cognitive radio enabled smart grid architecture. We then discuss major cyber security challenges in smart grid deployment and additional challenges introduced by cognitive radio technology. Spectrum sensing is one of the important aspect for opportunistic spectrum access in cognitive radio enabled smart grid networks. Cooperative spectrum sensing can improve the sensing performance in which multiple cognitive radio users cooperate to sense primary user bands. However, cooperative spectrum sensing is vulnerable to incumbent emulation and spectrum sensing data falsification (SSDF) attacks. Thus, we propose a two-stage scheme for defense against SSDF attacks. Simulation results show that the proposed two-stage scheme can identify and exclude the attackers accurately.

关键词： Smart grids Sensors Security Smart meters Cognitive radio Reliability

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A multi-path forwarding strategy for content-centric networking

A multi-path forwarding strategy for content-centric network...

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IEEE International Conference on Communications in China (ICCC)

作者： Guanghui Zhang Hui Li Tingting Zhang Dagang Li Li Xu School of Electronic & Computer Engineering Peking University Shenzhen China Engineering Lab of Converged Networks Technology Shenzhen China Communication Engineering Research Center Harbin Institute of Technology Shenzhen China

Content-Centric Networking (CCN) is a new networking paradigm to resolve the data traffic explosive problem of the Internet caused by a rapid increase in file sharing and video streaming traffic. Instead of seeking a single best path in the IP network, CCN is able to employ multipath to deliver packets. The conventionally adopted CCN forwarding strategies, such as taking advantage of replication of Interests or the shortest path do not offer satisfying performance under high-bandwidth requirements. In this paper, we present a Luby Transform (LT) code aided multipath forwarding strategy (LTCA-MF), which aims at reducing data downloading time and improving load balance in forwarding by transmitting LT coded contents on multiple disjoint paths. Tested by a large-scale network simulation scenario, our LTCA-MF strategy achieves excellent performance with desirable reliability and feasibility in comparison to others.

关键词： Servers Routing Greedy algorithms IP networks Complexity theory Decoding Encoding

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Capacity analysis of hybrid wireless networks with long-range social contacts behavior

Capacity analysis of hybrid wireless networks with long-rang...

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IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： Ronghui Hou Yu Cheng Jiandong Li Min Sheng King-Shan Lui State Key Lab of Integrated Service Networks Xidian University Xi'an China Department of Electrical and Computer Engineering Illinois Institute of Technology Chicago USA State Key Lab of Integrated Service Networks Xidian University Department of Electrical and Electronic Engineering The University of Hong Kong Hong Kong

Hybrid wireless networks are networks that are composed of both ad hoc transmissions and cellular transmissions. Many existing works have analyzed the capacity of hybrid wireless networks. By assuming the uniform traffic model that a source node would select a random node as the destination, the network capacity is a function of number of nodes and number of base stations. Nevertheless, the real network traffic pattern is related to the social behaviors of users. In this work, we study the capacity of hybrid wireless networks with the social traffic model under the L-maximum-hop routing policy. If two nodes are within L hops away, packets will be transmitted in the ad hoc mode; otherwise, packets are transmitted through the base stations. To our best knowledge, we are the first to study this problem and develop the capacity as a function of number of nodes, number of stations, traffic model parameters, and L.

关键词： Ad hoc networks Base stations Wireless networks Routing Throughput Bandwidth computers

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Author Correction: Genomic footprints of activated telomere maintenance mechanisms in cancer (Dec, 10.1038/s41467-019-13824-9, 2022)

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NATURE COMMUNICATIONS 2022年第1期13卷 1-1页

作者： Sieverling, Lina Hong, Chen Koser, Sandra D. Ginsbach, Philip Kleinheinz, Kortine Hutter, Barbara Braun, Delia M. Cortes-Ciriano, Isidro Xi, Ruibin Kabbe, Rolf Park, Peter J. Eils, Roland Schlesner, Matthias Brors, Benedikt Rippe, Karsten Jones, David T. W. Feuerbach, Lars Division of Applied Bioinformatics German Cancer Research Center (DKFZ) 69120 Heidelberg Germany Faculty of Biosciences Heidelberg University 69120 Heidelberg Germany Division of Applied Bioinformatics German Cancer Research Center (DKFZ) Heidelberg Germany Faculty of Biosciences Heidelberg University Heidelberg Germany Division of Theoretical Bioinformatics German Cancer Research Center (DKFZ) 69120 Heidelberg Germany Department for Bioinformatics and Functional Genomics Institute for Pharmacy and Molecular Biotechnology (IPMB) and BioQuant 69120 Heidelberg Germany Division of Theoretical Bioinformatics German Cancer Research Center (DKFZ) Heidelberg Germany Institute of Pharmacy and Molecular Biotechnology and BioQuant Heidelberg University Heidelberg Germany German Cancer Consortium (DKTK) Heidelberg Germany National Center for Tumor Diseases (NCT) Heidelberg Heidelberg Germany Heidelberg Center for Personalized Oncology (DKFZ-HIPO) German Cancer Research Center (DKFZ) Heidelberg Germany German Cancer Consortium (DKTK) German Cancer Research Center (DKFZ) Heidelberg Germany Division of Chromatin Networks German Cancer Research Center (DKFZ) and BioQuant 69120 Heidelberg Germany Department of Biomedical Informatics Harvard Medical School Boston Massachusetts 02115 USA Department of Chemistry Centre for Molecular Science Informatics University of Cambridge Cambridge CB2 1EW UK Ludwig Center at Harvard Medical School Boston Massachusetts 02115 USA Department of Biomedical Informatics Harvard Medical School Boston MA USA Department of Chemistry Centre for Molecular Science Informatics University of Cambridge Cambridge UK Ludwig Center at Harvard Medical School Boston MA USA School of Mathematical Sciences and Center for Statistical Science Peking University Beijing 100871 China Heidelberg University Heidelberg Germany New BIH Digital Health Center Berlin Institute of Health (BIH) and Charité - Universitätsmedizin Berlin Berlin Germany Bioi

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A weighted hard combination scheme for cooperative spectrum sensing in cognitive radio sensor networks

A weighted hard combination scheme for cooperative spectrum ...

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IEEE International Conference on Telecommunications and Malaysia Communications (ICT-MICC)

作者： I. Mustapha Borhanuddin M. Ali Mohd F. A. Rasid A. Sali H. Mohamad Department of Computer and Communication System Engineering Universiti Putra Malaysia Serdang Selangor Malaysia Wireless Networks and Protocol Research Lab MIMOS Berhad Technology Park Malaysia Kuala Lumpur Malaysia

Multi-user spatial sensing diversity exploration through cooperation spectrum sensing greatly improves sensing performance. However, high communication overhead and energy costs for exchanging sensing results may limit its viability in a realistic large scale resource constraint network such as cognitive radio wireless sensor networks. This paper presents a Weighted Hard Combination (WHC) scheme that combines features of both quantized and hard combining schemes to minimize energy cost for reporting sensing result and improve primary user detection performance in cooperative sensing. We evaluate the effectiveness of the scheme through simulation. Performance comparison of the WHC scheme in terms of detection performance, reporting energy cost and reporting time ratio with conventional hard combination, soft combination and quantized schemes indicates viability of the scheme. The results indicate that the WHC scheme minimizes reporting energy cost by 70% and improves detection performance by 5.6% compared to the quantized 3-bits scheme.

关键词： Sensors Cognitive radio Wireless sensor networks Diversity reception Signal to noise ratio Interference

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Energy management of cooperative microgrids with P2P energy sharing in distribution networks

Energy management of cooperative microgrids with P2P energy ...

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IEEE International Conference on Smart Grid Communications (SmartGridComm)

作者： Tian Liu Xiaoqi Tan Bo Sun Yuan Wu Xiaohong Guan Danny H. K. Tsang Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Hong Kong MOE Key Lab for Intelligent Networks and Network Security Xi'an Jiaotong University Xi'an China College of Information Engineering Zhejiang University of Technology Hangzhou China

To handle the mismatch problem between local demand and local generation in microgrids (MGs), the paradigm of peer-to-peer (P2P) energy sharing among neighboring MGs has been considered as a promising solution for improving the utilization of local distributed energy resources and saving the energy bills for all MGs. Existing works on cooperative MGs usually consider the high-level energy sharing and trading strategies but little about the physical constraints (e.g. voltage tolerance and power flow constraints) in the underlying distribution network. Hence, their solutions may not be applicable to practical power systems. This paper proposes an optimization problem that aims at minimizing the overall energy cost and the P2P energy sharing losses in a distribution network consisting of multiple MGs and explicitly incorporates the practical constraints (e.g., power balance and battery's operational constraints). The proposed optimization problem is difficult to solve directly due to the non-convex constraints. Nevertheless, motivated by the very recent result in radial distribution networks, the proposed non-convex optimization problem can be relaxed to a second-order cone programming (SOCP) problem without incurring any loss of optimality. We apply the proposed problem to a radial distribution network testbed and obtain the corresponding optimal energy management strategy, which exploits the diversified energy consumption profiles to dynamically coordinate multiple MGs and reduces the total energy bill of all MGs. Moreover, an interesting observation from the simulation results is that the cooperation scheme in the P2P sharing network is significantly affected by the MGs' relative locations in the distribution network.

关键词： Propagation losses Smart grids Microgrids Optimization Numerical models Renewable energy sources

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Performance analysis of two-hop-relay cellular systems with queueing capability

Performance analysis of two-hop-relay cellular systems with ...

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2015 International Conference on Information and Communications Technologies, ICT 2015

作者： Lu, Weifeng Gu, Mengmeng Yang, Luxi College of Computer Nanjing University of Posts and Telecommunications Nanjing210023 China School of Information Science and Engineering SouthEast University Nanjing210096 China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing Jiangsu210023 China Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Jiangsu Province Nanjing Jiangsu210023 China

ISBN: (纸本)9781849199940

In this paper, we present a two-hop-relay WCDMA cellular system with queueing capability, where a call can wait in the incoming buffer at the congested Base Transceiver Station (BTS) if no channel is immediately available, so as to reduce the call blocking rate. We develop an analytic model based on Multidimensional Markov chains. Then based on this model, we can obtain the average transmission rate and the queuing delay performance of the system respectively. Finally, through numerical calculation, we analyze the impact of the various parameters on the performance of the two-hop-relay WCDMA cellular system with queueing capability.

关键词： Queueing theory

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Performance evaluation for caching-based content distribution in backhaul-limited small cell networks

Performance evaluation for caching-based content distributio...

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International Conference on Wireless Communications and Signal Processing (WCSP)

作者： Ronghui Hou Yu Cheng Lin X. Cai Hongcheng Zhuang State Key Lab of Integrated Service Networks Xidian University Xian China Department of Electrical and Computer Engineering Illinois Institute of Technology Chicago USA R&D Centre Huawei Technologies Shenzhen China

ISBN: (纸本)9781467376884

Distributed caching at the edge can reduce the backhaul resource consumption, which is considered as a major way to improve network capacity in dense small cell networks. In this paper, we consider the caching-based content distribution in dense small cell networks. In such a content distribution system, the most critical metric is the user request blocking probability. A user's request will be rejected if the content is not cached at the associated SBS and there is no backhaul resource available at the SBS. In this paper, we develop an analytic model to derive the blocking probability as the function of cache capacity, available backhaul resource, and request arrival rates. Based on the analysis, the optimal resource configuration is determined to minimize the blocking probability. Extensive simulations are conducted to validate our analysis.

关键词： Analytical models Probability Capacity planning Electronic mail Wireless communication Markov processes Steady-state

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A Study of IEEE 802.15.6 Association Protocols

A Study of IEEE 802.15.6 Association Protocols

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IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom)

作者： Jing Feng Xin Huang Yulin Lu Ruiyang Xu Zheng Yan Computer Science and Software Engineering Xi'an Jiaotong-Liverpool University Suzhou China Department of Communications and Networking Aalto University Espoo Finland State Key Lab of Integrated Services Networks Xidian University Xian China

ISBN: (纸本)9781467379533

A body area network is a network of small and portable devices around human bodies. It enables a number of interesting applications including elderly healthcare and chronic diseases monitoring. Since body area networks are used to collect sensitive information, they require proper security protections. IEEE Std 802.15.6 is a standard for body area networks, it also provides mechanisms for strong security. In this paper, security association protocols proposed in the standard are reviewed. First of all, several security flaws are found. In addition, we also get some interesting findings from the standpoint of performance and usability.

关键词： Protocols Public key Nickel Message authentication IEEE 802.15 Standard

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Poster abstract: Automatic configuration of controlled interference experiments in sensornet testbeds 12

Poster abstract: Automatic configuration of controlled inter...

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12th ACM Conference on Embedded Networked Sensor Systems, SenSys 2014

作者： Oppermann, Felix Jonathan Boano, Carlo Alberto Zimmerling, Marco Römer, Kay Institute for Technical Informatics Graz University of Technology Austria Computer Engineering and Networks Lab ETH Zurich Switzerland

ISBN: (纸本)9781450331432

Experiments under controlled radio interference are crucial to assess the robustness of low-power wireless protocols. While tools such as Jamlab augment existing sensornet testbeds with realistic interference, it remains an error-prone and time-consuming task to manually select the set of nodes acting as jammers and their individual transmit powers. We present an automated configuration approach based on simulated annealing to overcome this problem. A preliminary evaluation based on two testbeds shows that our approach can find near-optimal solutions within at most a few hours. We believe our approach can facilitate the widespread adoption of controlled interference experiments by the sensornet community. Copyright 2014 ACM.

关键词： Testbeds

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