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Design and analysis of software-defined wireless sensor network based on mobile agent topology discovery 4

Design and analysis of software-defined wireless sensor netw...

引用

4th IEEE International Conference on Computer and Communications, ICCC 2018

作者： Tian, Wang Muqing, Wu Min, Zhao Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Post and Telecommunications Beijing China

ISBN: (纸本)9781538683392

In wireless sensor network, how to quickly match the real-time changing network and reduce the energy consumption in the topology discovery process has been a hot research topic, especially in the network with a large amount of mobile nodes. This paper proposes an improved mobile agents topology discovery (IMATD) protocol for software-defined wireless sensor network (SDWSN). This protocol uses mobile agents (MA) to quickly and efficiently go through each node in the network and collect their topology-related information so that each node can obtain the entire network's topology information. And the mobile agents report and update collected topology information to the controller periodically, so the controller can achieve efficient network management. The simulation results show that the proposed protocol can effectively reduce topology discovery convergence time, reduce topology discovery energy consumption, and balance node energy distribution of the entire network. © 2018 IEEE.

关键词： Energy utilization

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Beam Search Assisted User Scheduling for mmWave Hybrid Beamforming systems

Beam Search Assisted User Scheduling for mmWave Hybrid Beamf...

引用

Computing, Communications and Applications Conference (ComComAp)

作者： Yu Chen Huiwen Wu Danpu Liu Beijing Laboratory of Advanced Information Network Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing P.R. China

ISBN: (数字)9781728119731

ISBN: (纸本)9781728119748

User scheduling in mmWave multi-user multiple-input multiple output (MU-MIMO) systems involves the joint optimization of user selection and beam pair selection due to its hybrid beamforming architecture. Most of the existing solutions are based on ideal channel state information (CSI). How to choose the users to be scheduled and their beams for operation in the case of non-ideal CSI is still challenging. In this study, we propose a blind beam search assisted user scheduling (BSUS) algorithm operating in the absence of ideal CSI. The proposed method consists of two steps. In the first step, the beam information acquired in the initial beam training is used to identify the channels' orthogonality and classify the users into groups. In the second step, a scheduled user is chosen from each group to maximize the equivalent channel energy. Subsequently, the selection of beam pairs for communication is simplified owing to the information acquired in initial beam training. Simulation results show that the proposed scheme can achieve 93.6% of the maximal sum rate, and maintain a low computational complexity.

关键词： Radio frequency Array signal processing Job shop scheduling Training Computational complexity MIMO communication

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Energy-Balanced Clustering Algorithm for Software-Defined Wireless Sensor networks

Energy-Balanced Clustering Algorithm for Software-Defined Wi...

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International Conference on Computer and Communications (ICCC)

作者： Zou Haosen Wu Muqing Liu Boyang Beijing Key Laboratory of Network System Architecture Convergence Beijing University of Posts and Telecommunications Beijing P.R.China

ISBN: (数字)9781728147437

ISBN: (纸本)9781728147444

The energy supply of sensor nodes is limited, and the sensor nodes near the sink node usually die out earlier than other nodes which causes the imbalance of energy consumption in wireless sensor network (WSN). In order to extend the network lifetime and balance the energy consumption, we present a new clustering algorithm called Energy-balanced Clustering Algorithm (EBCA) based on software-defined wireless sensor network (SDWSN). In our algorithm, the controller redefines the communication radius of each sensor node based on distance from sink node and the number of neighbor nodes, and gives a new clustering method based on the residual energy of itself and its neighbor node. The simulation results show that our algorithm has better performance on balancing energy consumption and extending network lifetime compared with the typical data transmission algorithm.

关键词： Clustering algorithms Wireless sensor networks Energy consumption Routing network topology Wireless communication Protocols

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Beam reconfigurable antenna based on liquid crystal metasurface 4

Beam reconfigurable antenna based on liquid crystal metasurf...

引用

4th IEEE International Conference on Computer and Communications, ICCC 2018

作者： Liu, Li Deng, Li Li, Shufang Zhang, Chen Wang, Ling Qu, Meijun Beijing Key Laboratory of Network System Architecture and Convergence Beijing Laboratory of Advanced Information Network Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781538683392

A novel design method of electronically controlled beam reconfigurable antenna using liquid crystal metasurface is presented in this paper. The metasurface is a two-dimensional plane composed of a series of sub-wavelength liquid crystal unit cells. The beam in desired radiation direction can be achieved by varying the impedance distribution of liquid crystal metasurface according to microwave holographic technique. In the simulation, we can obtain an arbitrary radiation direction beam within the zenith angle range of 35°∼60° at 39 GHz, and the maximum gain reaches 10.65 dB. Such a beam reconfigurable antenna with low profile (44\ \mathbf{mm}\ast 44\ \mathbf{mm}\ast 2.15\ \mathbf{mm}) and continuously adjustable beam has great value in practical applications of mobile communications. © 2018 IEEE.

关键词： Liquid crystals

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Energy consumption optimization scheme of cloud data center based on SDN 8

Energy consumption optimization scheme of cloud data center ...

引用

8th International Congress of Information and Communication Technology, ICICT 2018

作者： Liao, Qing Wang, Zun Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing100876 China

In response to the mobile Internet, Internet of things and cloud computing technology fast development, the operation of large-scale distributed computing cloud data center construction in the world at the same time, the network data calculation of energy consumption problem is causing extensive concern. And the software-defined network (SDN) provides a feasible solution to the rigid problem of traditional network architecture. Based on SDN technology, this paper proposes a method of energy consumption control based on cloud data center. Aiming at server energy saving, the multi-objective optimization model of virtual machine migration integration is established, and the integration mechanism of virtual machine migration based on mixed single-parent genetic algorithm is proposed. The experimental results show that the algorithm can be used to solve the problem of virtual machine migration and integration in data center. © 2018 The Authors. Published by Elsevier Ltd.

关键词： Genetic algorithms

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Machine Learning Based Task Scheduling for Wireless Powered Mobile Edge Computing IoT networks

Machine Learning Based Task Scheduling for Wireless Powered ...

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International Conference on Wireless Communications and Signal Processing (WCSP)

作者： Jianqi Xie Sihua Wang Changchuan Yin Beijing Laboratory of Advanced Information Network Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing P. R. China

The following topics are dealt with: learning (artificial intelligence); wireless channels; optimisation; resource allocation; cellular radio; probability; MIMO communication; error statistics; telecommunication compu... 详细信息

关键词： Task analysis Delays Servers Wireless communication Wireless sensor networks RFID tags Computational modeling

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Balancing energy consumption algorithm based-on controller handover for software-defined wireless sensor network 4

Balancing energy consumption algorithm based-on controller h...

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4th IEEE International Conference on Computer and Communications, ICCC 2018

作者： Lei, Cao Muqing, Wu Min, Zhao Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Post and Telecommunications Beijing100876 China

ISBN: (纸本)9781538683392

In recent years, SDWSNs has been gaining more and more attention in the wireless sensor networks (WSNs) space. This phenomenon is mainly attributed to that both data collection and definable control can be more clearly achieved. However, simultaneously, there are some defects in energy balance and energy efficiency in SDWSNs, especially in the case of all nodes with limited energy. Large amounts of data reception will cause the rapid energy consumption in the aspect of energy of the controller, which will quickly lead to network failure. In this paper, to balance energy consumption of network in which energy of all nodes are limited and prolong lifetime of the network, we propose a novel balancing energy consumption algorithm based-on controller handover. In proposed algorithm, BP neural network is applied to support the mechanism of handover. Simulation results show that this algorithm can effectively balance energy consumption and extend lifetime of the network compared with the traditional energy saving algorithms in SDWSNs. © 2018 IEEE.

关键词： Energy utilization

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The Role of OPC UA TSN in IT and OT convergence

The Role of OPC UA TSN in IT and OT Convergence

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Chinese Automation Congress (CAC)

作者： Shuo Tian Yihong Hu Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China

The Industrial Internet is a kind of infrastructure that is closely connected with people, industries, and network, and it can realize the low cost and high efficiency of intelligent production. Promoting the convergence of Information Technology (IT) and Operation Technology (OT) is the foundation to realize the Industrial Internet. However, IT and OT exist independently and cannot be unified all the time. How can they work together effectively? We describe the model of OPC Unified architecture (OPC UA) and Time-Sensitive networking (TSN) in this paper that will effectively solve the problem of IT and OT convergence. We also compare three TSN models, discuss which obstacles to IT and OT convergence will be addressed by OPC UA TSN in detail, and analyze the features of OPC UA TSN. It proves that OPC UA TSN will play an important role in the process of IT and OT convergence.

关键词： Protocols convergence Internet Bridges Industries Interoperability Production facilities

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An Efficient Configuration Scheme of OPC UA TSN in Industrial Internet

An Efficient Configuration Scheme of OPC UA TSN in Industria...

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Chinese Automation Congress (CAC)

作者： Zefeng Zhou Guochu Shou Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China

TSN plays an important role in industrial Internet due to its bounded low latency and high reliability. In order to have TSN worked in practical applications, it is urgent to study the configuration of TSN. Based on the standard of IEEE 802.1 Qcc, we propose a configuration scheme of OPC UA TSN, describe the functionality and procedure of the scheme in detail. We verify that our configuration scheme can satisfy the bounded delay requests of periodic time-sensitive data flows.

关键词： Delays Switches Standards Real-time systems Protocols Jitter Job shop scheduling

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Queue-Sensing-Based CSAT: A Downlink Transmission Scheme for LTE-M in Unlicensed Spectrum

Queue-Sensing-Based CSAT: A Downlink Transmission Scheme for...

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作者： Zelin Gong Ying Wang Tao Luo Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing Laboratory of Advanced Information Networks Beijing University of Posts and Telecommunications

A shortage of licensed spectrum is a major hindrance to the capacity of Long Term Evolution for Metro(LTE-M) to carry urban rail transit services at *** by LTE-Unlicensed(LTE-U) offloading some of data traffic transmitted in licensed spectrum by accessing the unlicensed 5 GHz frequency band, we propose a queue-sensing-based Carrier Sensing Adaptive Transmission(CSAT) scheme for LTE-M in unlicensed spectrum based on *** scheme calculates the minimum amount of data that should be transmitted during current transmission duration by queue length at the beginning of each LTE-U cycle, according to which, LTE-U adjusts its duty cycle to meet the requirement of LTE-M *** paper focuses on the downlink transmission scheme for LTE-M in unlicensed spectrum, and verifies its performance by simulation, which tells that Queue-sensing-based CSAT will not only provide a reliable transmission for LTE-M services, but also maximize the fairness of channel occupancy in unlicensed spectrum.

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