Abstract:To cope with the challenge of successful edge offloading brought by the mobility of mobile devices in intelligent factories, this paper studies the optimization problem of the edge offloading strategy of mobile devices based on mobility. Considering the decision task flow executed by priority, the unique offloading method of a single task, the communication range of the edge server, and the delay constraint of the offloading of a single task, appropriate computing resources are selected according to the real-time location of the mobile device to offload the computing task. Based on the edge computing architecture of an intelligent factory, this paper puts forward five different computation offloading methods. From a global perspective, the energy consumption and delay of tasks offloading in local, edge, cloud center, local-edge collaboration, and local-edge-cloud collaboration are considered. In this paper, the algorithm based on genetic algorithm and particle swarm optimization is used to design the optimal decision task flow offloading strategy which can obtain the minimum energy consumption and delay. Simulation results show that the proposed algorithm can reduce the computation offloading energy consumption and delay of mobile devices.

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	1. Edge Offloading Strategy for Mobile Devices in Intelligent Factories Based on Energy Consumption and Delay
	XIAO Ye,ZHOU Xiaoming,LI Zhao,ZHAO Chenglin,XU Fangmin
	Electrics, Communication and Autocontrol Technology 29 March 2021
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	Abstract:To cope with the challenge of successful edge offloading brought by the mobility of mobile devices in intelligent factories, this paper studies the optimization problem of the edge offloading strategy of mobile devices based on mobility. Considering the decision task flow executed by priority, the unique offloading method of a single task, the communication range of the edge server, and the delay constraint of the offloading of a single task, appropriate computing resources are selected according to the real-time location of the mobile device to offload the computing task. Based on the edge computing architecture of an intelligent factory, this paper puts forward five different computation offloading methods. From a global perspective, the energy consumption and delay of tasks offloading in local, edge, cloud center, local-edge collaboration, and local-edge-cloud collaboration are considered. In this paper, the algorithm based on genetic algorithm and particle swarm optimization is used to design the optimal decision task flow offloading strategy which can obtain the minimum energy consumption and delay. Simulation results show that the proposed algorithm can reduce the computation offloading energy consumption and delay of mobile devices.
	TO cite this article:XIAO Ye,ZHOU Xiaoming,LI Zhao, et al. Edge Offloading Strategy for Mobile Devices in Intelligent Factories Based on Energy Consumption and Delay[OL].[29 March 2021] http://en.paper.edu.cn/en_releasepaper/content/4754387


	2. A minimum bandwidth occupation mechanism for collision avoidance system
	Ma Yanyan,Zhang Xin
	Electrics, Communication and Autocontrol Technology 15 January 2021
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	Abstract:Collision avoidance as an essential use case for vehicular networks can effectively enhance the safety of vehicles. This paper addresses how to avoid collision between vehicles and vulnerable road users(VRU), i.e., pedestrians, cyclists or motorists equipped with smartphones. Due to the limited computation resource and processing capability of smartphones, mobile edge computing (MEC) is introduced. MEC is utilized to reduce the transmission delay and relieve the network congestion, by pushing computation resource and processing capability to network edge. In particular, this paper focuses on a collision avoidance scenario including an edge collision detector, multiple vehicles and VRUs. In addition, we propose a minimum bandwidth occupation algorithm for collision warning. By calculating the consumed bandwidth of two different candidate alerting methods, we are able to decide the most efficient way, which occupates minimum bandwidth, to avoid the colliison.
	TO cite this article:Ma Yanyan,Zhang Xin. A minimum bandwidth occupation mechanism for collision avoidance system[OL].[15 January 2021] http://en.paper.edu.cn/en_releasepaper/content/4753372

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	3. Target Parameters Estimation of Frequency Diverse Array based on Preprocessing l1-SVD Algorithm
	Liao Yanping,Pan Yue
	Electrics, Communication and Autocontrol Technology 04 March 2020
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	Abstract:Due to too much data, the efficiency of l1 norm-Singular Value Decomposition (l1-SVD) algorithm becomes poor, this paper proposes a Preprocessing l1-SVD algorithm. This method is based on the frequency diversity array of L-type array. Firstly, the search space of the target position is preprocessed to reduce the search space by the inner product of the received data and the perception matrix. Then, l1-SVD algorithm is used to estimate the search space after proposed preprocessing. The simulation results show that the algorithm has better efficiency in the face of large amount of data, and the estimation accuracy is also improved compared with that without processing.
	TO cite this article:Liao Yanping,Pan Yue. Target Parameters Estimation of Frequency Diverse Array based on Preprocessing l1-SVD Algorithm[OL].[ 4 March 2020] http://en.paper.edu.cn/en_releasepaper/content/4751024


	4. Observer-based H∞ Event-triggered Control for Piecewise Affine Systems
	JIANG Yong-Hao,WU wei,WU wei
	Electrics, Communication and Autocontrol Technology 13 January 2020
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	Abstract:This paper investigates output-based H∞ event-triggered control for piecewise affine systems. Firstly, to cope with the situation that the system states are not completely measurable, an observer is designed. Then based on the observer and the system output, an event-triggering mechanism as well as the feedback controller are proposed. The output space partition of the piecewise affine system is approximated by degenerate ellipsoids. Based on the piecewise Lyapunov function, the co-design problem of the observer, the controller and the event-triggering rule is transformed into an LMI-based sufficient condition. The observer and the controller can be obtained by solving a set of LMIs. The stability of the closed-loop system is guaranteed and meanwhile the number of the transmission can be significantly reduced. Finally, a numerical example is provided to illustrate the effectiveness of the proposed approach.
	TO cite this article:JIANG Yong-Hao,WU wei,WU wei. Observer-based H∞ Event-triggered Control for Piecewise Affine Systems[OL].[13 January 2020] http://en.paper.edu.cn/en_releasepaper/content/4750414


	5. Fine-grained Handwriting Recognition Using Wi-Fi Signals in SIMO Scenario Based on WKNN
	LI Xudong,JIANG Ting,PAN Xu,DING Xue
	Electrics, Communication and Autocontrol Technology 25 February 2019
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	Abstract:Using wireless signals to implement new type of human-computer interaction is a hot topic in recent years. In this paper, we try to use the received signal strength indicators (RSSI) of multi-channel Wi-Fi frames to achieve fine-grained handwriting recognition. A New method of Handwriting Detection Algorithm whose average precision rate and recall rate of handwriting detection have been respectively achieved to 91.77% and 97.19% is proposed. We also designed a new kind of weighted k-nearest neighbors algorithm (WKNN) which is improved by multi-dimensional dynamic time warping (MD-DTW). It can achieve an average accuracy of 91% in the classification of 26 letters in experimental environment.
	TO cite this article:LI Xudong,JIANG Ting,PAN Xu, et al. Fine-grained Handwriting Recognition Using Wi-Fi Signals in SIMO Scenario Based on WKNN[OL].[25 February 2019] http://en.paper.edu.cn/en_releasepaper/content/4747345


	6. Relay Selection and Power Allocation in Buffer-Aided Two-way Relaying Networks with Energy Harvesting
	ZENG Fan-Zi,LI Kang
	Electrics, Communication and Autocontrol Technology 28 April 2018
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	Abstract:In this paper, we study a bidirectional two-way relaying selection network consisting of a source, a destination and multiply half-duplex decode-and-forward (DF) relays. Firstly, we consider three time slots transmission model. In the first slot, selected relay applies time-switching protocol to harvest radio frequency energy radiated by source and destination; in the remaining slots, selected relay cooperates source and destination for information exchange. Secondly, due to finite-size data buffer and finite-size battery of relay, we propose optimal relay selection and power allocation policy, under the delay-tolerant and delay-constraint constraints. Without considering the link outage, users can adaptively adjust transmission rate to maximize system sum-throughput. In addition, we analyze the effect of transmission time on sum-throughput. However, our sum-throughput optimization problem is a non-convex problem. Further, we relax relay selection coefficient and use Karush-Kuhn-Tucker (KKT) conditions. The optimal power is obtained by Lagrange dual decomposition. Simulations can prove that sum-throughput of our proposed strategy is affected by buffer size and battery capacity, as well as time allocation of each transmission phase.
	TO cite this article:ZENG Fan-Zi,LI Kang. Relay Selection and Power Allocation in Buffer-Aided Two-way Relaying Networks with Energy Harvesting[OL].[28 April 2018] http://en.paper.edu.cn/en_releasepaper/content/4744786


	7. A Triple Optimization Strategy of Resource Allocation in Full-Duplex OFDMA Macrocell-femtocell Heterogeneous Networks
	ZENG Fan-Zi,LI Qiao,LI Qiao
	Electrics, Communication and Autocontrol Technology 26 April 2018
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	Abstract:We investigate the problem of cross-tier interference control in full-duplex (FD) Orthogonal Frequency Division Multiple Access (OFDMA) based heterogeneous networks (HetNets) consisting of macrocell and underlaying femtocells. A price mechanism is introduced where the macro base station (MBS) and femtocell base stations (FBSs) all aim to maximize their own utility function considering finite interference constraint. We propose a triple optimization strategy of power control, subcarrier allocation and price regulation which can solve the cross-tier interference optimization problem of femtocell to macrocell. We analyze the superiority of the barrier method for the utility function of the macrocell, and to a certain extent, it has a better convergence. Through the experiment, we can see that the proposed the triple resource allocation algorithm can effectively suppress cross-tier interference and maximize the utility of macrocell and femtocells.
	TO cite this article:ZENG Fan-Zi,LI Qiao,LI Qiao. A Triple Optimization Strategy of Resource Allocation in Full-Duplex OFDMA Macrocell-femtocell Heterogeneous Networks[OL].[26 April 2018] http://en.paper.edu.cn/en_releasepaper/content/4744787


	8. An improved event-triggered mechanism for networked cascade control system with stochastic nonlinearities
	Gu Zhou ,Zhao Huan ,Yang Lin Hui
	Electrics, Communication and Autocontrol Technology 10 May 2017
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	Abstract:This paper proposes an improved event-triggered mechanism for networked cascade control system $(NCCS)$ with network-induced delay and stochastic nonlinearities. Firstly, different from the conventional method by preestablishing a fixed triggering parameter, the improved event-triggered mechanism in this paper can adaptively adjust the triggering parameter with respect to the time interval and the dynamic error to reduce the transmission rate while limiting the maximum allowable number of continuous packet loss $(MAPL)$. Secondly, a model of $NCCS$ is established with consideration of network-induced delay, multiplicative stochastic nonlinearities and uncertainties. The multiplicative stochastic disturbances are in the form of a scalar Gaussian white noise with unit variance. Thirdly, by using the linear matrix inequality $(LMI)$ method, sufficient conditions are established that ensure the mean-square stability of the $NCCS$, and then controllers' parameters are characterized by the solution to a set of $LMI$. Finally,two examples are exploited to show the effectiveness of the proposed event-triggered mechanism.
	TO cite this article:Gu Zhou ,Zhao Huan ,Yang Lin Hui . An improved event-triggered mechanism for networked cascade control system with stochastic nonlinearities[OL].[10 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4732601


	9. Performance Analysis and Optimization of Downlink Cellular Networks with Vertical Sectorization
	Zhou Jun-Peng, FAN Jian-Cun, ZHANG Ying, LUO Xin-Min
	Electrics, Communication and Autocontrol Technology 03 May 2017
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	Abstract:In this paper, we investigate the vertical sectorization in a downlink cellular network and optimize the identify threshold of vertical sectorization and antenna downtilt of each vertical sector. Firstly, we use gamma distribution to approximate the achievable sum-rates of the cellular networks with vertical sectorization. Then, according to the approximation, we formulate an optimization problem to maximize system throughput and achieve the optimization solution through a simple algorithm. The simulation results show that the system sum-rates can be improved by optimizing the number of vertical sectors, the threshold of vertical sectorization, and the antenna downtilt.
	TO cite this article:Zhou Jun-Peng, FAN Jian-Cun, ZHANG Ying, et al. Performance Analysis and Optimization of Downlink Cellular Networks with Vertical Sectorization[OL].[ 3 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4728780


	10. Gold nanoparticles decorated silicon nanowires thin-film absorbers
	YANG Liu,CHEN Fugen
	Electrics, Communication and Autocontrol Technology 24 April 2017
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	Abstract:We proposed a thin-film absorber based on gold nanoparticles decorated silicon nanowires on thin gold film, with which broadband and enhanced absorption was experimentally demonstrated compared with others without gold nanoparticles or gold film. The high absorption was attributed to not only the top gold nanoparticles, which introduced enhanced light coupling and reduced reflection due to the exciation of surface plasmon polaritons, but also the bottom gold thin film, which greatly suppressed the light transmission.
	TO cite this article:YANG Liu,CHEN Fugen. Gold nanoparticles decorated silicon nanowires thin-film absorbers[OL].[24 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4727028

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