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Novel MAC Layer Proposal for URLLC in IndustrialWireless Sensor Networks

ZTE Communications 2017年第B6期15卷 50-59页

作者： Mohsin raza Sajjad Hussain Hoa Le-Minh nauman Aslam Northumbria University NewcastleNE18STUK University of Glasgow GlasgowG128QQUK

Ultra-reliable and low-latency communications(URLLC) has become a fundamental focus of future industrial wireless sensor net-works(IWSNs). With the evolution of automation and process control in industrial environments, the need for increased reliabilityand reduced latencies in wireless communications is even pronounced. Furthermore, the 5G systems specifically target the URLLCin selected areas and industrial automation might turn into a suitable venue for future IWSNs, running 5G as a high speed inter-process linking technology. In this paper, a hybrid multi-channel scheme for performance and throughput enhancement of IWSNsis proposed. The scheme utilizes the multiple frequency channels to increase the overall throughput of the system along with theincrease in reliability. A special purpose frequency channel is defined, which facilitates the failed communications by retransmis-sions where the retransmission slots are allocated according to the priority level of failed communications of different nodes. Ascheduler is used to formulate priority based scheduling for retransmission in TDMA based communication slots of this ***, in carrier-sense multiple access with collision avoidance(CSMA/CA) based slots, a frequency polling is introducedto limit the collisions. Mathematical modelling for performance metrics is also presented. The performance of the proposed schemeis compared with that of IEEE802.15.4e, where the performance is evaluated on the basis of throughput, reliability and the num-ber of nodes accommodated in a cluster. The proposed scheme offers a notable increase in the reliability and throughput over theexisting IEEE802.15.4e Low Latency Deterministic Networks(LLDN) standard.

关键词： industrial wireless sensor network(IWSN) IEEE802.15.4e Low Latency Deterministic Network(LLDN) low latency communica-tions(LLC) ultra-reliable low latency communication(URLLC)

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Intelligent Load Shedding Using TCP/IP for Smart Grids

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Energy and Power Engineering 2012年第6期4卷 398-403页

作者： Muhammad Qamar raza Muhammad Ali nauman Tareen Waheed ur Rehman Asadullah Khan Azam Ul Asar Department of Electrical Engineering COMSATS Institute of Information Technology Abbottabad Pakistan

Computerized power management system with fast and optimal communication network overcomes all major discrepancies of undue or inadequate load relief that were present in old conventional systems. This paper presents the basic perception and methodology of modern and true intelligent load shedding scheme in micro grids topology by employing TCP/IP protocol for fast and intelligent switching. The network understudy performs load management and power distribution intelligently in a unified network. Generated power is efficiently distributed among local loads through fast communication system of server in the form of source and clients in the form of loads through TCP/IP. The efficient use of information between server and clients enables to astutely control the load shedding in a power system of micro grids system. The processing time of above stated system comes out to be 10 ms faster than others which ensure very less delay as compared to conventional methods. The Micro Grids system operating through TCP/IP control has been implemented in MATLAB/SIMULINK and results have been verified.

关键词： Intelligent Load Shedding (ILS) TCP/IP Micro Grids (MGs) Server and Clients

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UP-Gradation of Power System Protection Scheme through TCP/IP Using GUI

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Energy and Power Engineering 2012年第6期4卷 392-397页

作者： Muhammad Qamar raza Muhammad Ali Asadullah Khan Waheed ur Rehman nauman Tareen Azzam Ul Asar Department of Electrical Engineering COMSATS Institute of Information Technology Abbottabad Pakistan

The paper is concerned with the Power System Protection schemes and the resulting design requirement that enhances stability as well as control with the implementation of TCP/IP. It discusses the architecture that upgrades the existing scheme by controlling all the control signals traffic between generating units, transmission system, connected loads and protection devices that are sensitive to control signals using TCP/IP and results are compared using Graphics User Interface (GUI) in MATLAB/Simulink. Protection system describes latest breakers circuit using indirect tripping command from generating units that protects load side through load breakers that receives action signal from local controllers that have a direct communication linkage with main server having strong data base, directly monitors everything through TCP/IP platform using GUI.

关键词： Power System Protection Scenario (PSPS) TCP/IP Graphical User Interface (GUI)

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