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Wireless sensor networks

Xem 1-20 trên 397 kết quả Wireless sensor networks
  • In this paper, a survey of recent power managing techniques is presented. It provides an insight into how they can be used and orchestrated so that satisfactory performance can be achieved within a given energy budget. Moreover, the advantages and also drawbacks are analyzed to provide users with a good comprehension of power managers for a better choice.

    pdf4p vijaguar 16-11-2022 0 0   Download

  • In this paper, the issue of arranging and routing the nodes in the sensor network in a hierarchical manner is investigated, in which each lowest level sensor nodes are grouped in a cluster with a common cluster head, then the cluster-head plays an intermediate role transmit the information back and forth between the sensor nodes and the base station.

    pdf8p vimelindagates 18-07-2022 4 1   Download

  • With the rise of the Internet of Things (IoT), the risk of information security is increasing. There have been many proposals for IoT security, however, so far, there is not truly effective and comprehensive solution. The study aims at lightweight encryption, with the basic goal of reducing the loops of encryption algorithms, reducing the computing requirements, and energy consumption of the system while ensuring safety, and integrating into new Protocols of IoT networks and weak resource devices.

    pdf8p vimelindagates 18-07-2022 40 1   Download

  • Wireless networks - Lecture 34: Wireless sensor networks. The main topics covered in this chapter include: introduction to WSN; applications of WSN; factors influencing performance of WSN; architecture and communication protocols; challenges in WSNs;...

    ppt31p haoasakura 30-05-2022 7 1   Download

  • Wireless networks - Lecture 37: Transport protocols/security in WSN. The main topics covered in this chapter include: transport protocols for WSN; TCP/UDP for WSN; protocols; security threats in WSN; TinySec; motivations of link layer security; TinySec design goals; semantic secure encryption in TinySec;...

    ppt24p haoasakura 30-05-2022 11 1   Download

  • Wireless networks - Lecture 38: Security/Extensions of WSN. The main topics covered in this chapter include: security primitives in TinySec; encryption schemes; keying mechanism; wireless multimedia sensor networks - WMSN; wireless sensor actor networks - WSAN;...

    ppt30p haoasakura 30-05-2022 5 1   Download

  • Bài viết hướng tới việc đo, giám sát và phát hiện thiết bị tiêu thụ điện nhằm quản lý và tiết kiệm một cách tối ưu năng lượng, tài chính cho người sử dụng cũng như giám sát đồ thị tải cho nhà cung cấp, một nghiên cứu đã được phát triển trên nền kiến trúc phần cứng mã nguồn mở cho một thiết bị đo và giám sát quá trình tiêu thụ điện năng. Mỗi thiết bị đo là một điểm đo nằm trong mạng cảm biến không dây - Wireless Sensor Network với truyền phát không dây chuẩn Zigbee theo cấu trúc mạng kiểu mắt lưới Mesh.

    pdf7p wangziyi_1307 26-04-2022 22 1   Download

  • This paper suggests a solution to multi-connectivity deployment WSN coverage based on combining Sailfish optimizer (SFO) with the characteristic of 3D surface topography. The target area divided into mesh grids of a size to establish the multiconnectivity of every grid. The cover set constructed through the direction gradient probabilistic model and connected graph and the joint points to graph within the grid by optimizing SFO.

    pdf9p linyanjun_2408 21-04-2022 7 1   Download

  • This paper proposed a prediction method for the sensor node positioning based on a multilayer perception in the neural networks. The node locations based on its signals’ strength characteristics are captured to be a dataset. The features about the signal strength of the node considered to extract from a large number of signal strength samples included noise that is measured by the nearest neighbor estimation for inputs of the scheme system.

    pdf11p linyanjun_2408 21-04-2022 8 1   Download

  • This study suggests an optimal coverage model aimed at the optimal deployment of Wireless sensor networks (WSN) based on improving the artificial bee colony (ABC) algorithm. The distance between the sensor nodes is regulated reasonably by implementing quasi-gravitation and quasi-coulomb power. Also, with a low regional repetition rate, the ABC algorithm can achieve fast optimization. Besides, to minimize node energy consumption, the sensing radius of WSN nodes is dynamically modified.

    pdf10p linyanjun_2408 21-04-2022 10 1   Download

  • This paper presents a solution to the power balance control strategy for WSN with collaborating heuristic. A distance between the weight factors and obtained nodes interference value is used to establish a useful interference model for enhancing the signal-to-interference-noise ratio (SINR). The utility function of the nodes residual energy and transmission rate is modeled by apply heuristic strategy. The optimal transmission power is obtained after several iterations of the heuristic algorithm.

    pdf11p linyanjun_2408 21-04-2022 13 1   Download

  • This paper proposes a node location identification in WSN based on a combined Ant Lion Optimizer (ALO) with a typical model of localization. The fitness function is modeled mathematically based on estimating distances of the WSN nodes. The updating solutions of the population are figured out for position correcting to improve the node positioning accuracy. The effects of parameters like node density and communicating range is verified in the experiments to evaluate the performance of the proposed method in terms of concerning average localization error and success ratio.

    pdf11p linyanjun_2408 21-04-2022 7 1   Download

  • Lecture 14: Future ICT trends provide students with knowledge about artificial intelligence, ubiquitous (pervasive) computing personal area networks, wireless sensor networks RFIDs.

    ppt28p huangminghao_1902 27-02-2022 8 1   Download

  • Balçova-Narlıdere Geothermal Field (BNGF) hosts the largest geothermal district heating system of Turkey and several geothermal wells used for district heating and thermal tourism activities. This study assesses the use of BNGF geothermal fluid for agricultural activities. The spent geothermal brine was treated using nanofiltration and reverse osmosis membranes on a pilot-scale membrane test system. The qualities of the product were evaluated in terms of agricultural irrigation integrated with the implemented innovative wireless sensor network.

    pdf14p tanmocphong 29-01-2022 5 0   Download

  • The routing strategy among cluster heads in multi-hop wireless networks is still a big challenge because of its inefficiency in energy consumption aspects. Therefore, in this paper, we propose a novel method that combining an unequal clustering problem and a simple multi-hop routing to prolong network life. The numerical results show that the proposed solution is more effective than other models in recent studies

    pdf9p spiritedaway36 28-11-2021 15 0   Download

  • In this study, we clarify fundamental features of the framework and clear out the relations between them. Then based primarily on the power allocation factors, we examine interference between cognitive sensors and primary sensors even as enhancing throughput of the network. Eventually, Matlab/Simulink based simulation is conducted to verify the analysis.

    pdf7p visteveballmer 06-11-2021 15 0   Download

  • Mạng LoRa ngày càng được ứng dụng rộng rãi trong hệ thống mạng cảm biến không dây WSNs (Wireless Sensor Networks) bởi khả năng truyền xa, tiết kiệm năng lượng, hoạt động ổn định. Trong bài viết này, nhóm tác giả sẽ giới thiệu quá trình từng bước xây dựng và tổ chức giao thức truyền thông của mạng LoRa cấu trúc hình cây đảm bảo các yếu tố tin cậy, bảo mật, chuẩn công nghiệp.

    pdf7p vijihyo2711 25-09-2021 38 1   Download

  • In this paper, we analyze the performance of different node density of Wireless Sensor Network (WSN) operating under the IEEE Standard 802.15.4 in the beacon-enabled mode. The motivation for evaluating the beacon-enabled mode is due to its flexibility for WSN applications as compared to the nonbeacon enabled mode. The analysis is based on an accurate OPNET simulation model which supports slotted Carrier Sense Multiple Access Mechanism with Collision Avoidance (CSMA/CA) mechanism and Guaranteed Time Slot (GTS).

    pdf10p tunelove 12-06-2021 23 0   Download

  • The followings will be discussed in ebook Guide to computer network security - Part 2: System intrusion detection and prevention, computer and network forensics, virus and content filtering, standardization and security criteria: security evaluation of computer product, computer network security protocols, security in wireless networks and devices, security in sensor networks,…

    pdf283p lovebychance04 20-05-2021 15 1   Download

  • In the duty-cycled networks, packet delay is greatly affected by node deployment, therefore we aim to determine node density in a wireless sensor network in order to guarantee the average E2E delay given network parameters using the probability theory. Simulation results show that the proposed node deployment method consumes less energy while requiring a smaller number of sensor nodes than those of other existing works.

    pdf13p cothumenhmong11 05-05-2021 14 0   Download

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