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Using a wireless network

Xem 1-20 trên 191 kết quả Using a wireless network
  • 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 9 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 5 1   Download

  • In this paper, we introduce True Time, an open source Simulink package for simulation of networked control systems. By using True Time, we present an analysis and evaluation of the effects of communication network to the performance of a wireless process control system.

    pdf5p vichristinelagarde 04-07-2022 6 0   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 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 14 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 7 0   Download

  • The study site for this research was Shenandoah National Park (n = 1442). Using k-means clustering analysis, data were clustered into visitor groups and statistically compared to gain insight into patterns of responses. Visitors mostly reported neutral preferences for Wi-Fi access and cellular network service except for cell service park-wide in all national parks was reported as important

    pdf8p lazzaro 30-12-2021 9 0   Download

  • In this paper, we propose an evacuation support system that provides evacuation routes in case of disasters, and verify the usefulness of the system. Current popular wireless communication infrastructure is supported by a series of base stations and one base station handles a lot of communication.

    pdf15p redemption 20-12-2021 9 0   Download

  • This study introduces the application of exponential smoothing as a method of adaptive forecasting of cellular network traffic for cases of voice (in Erlang) and data (in megabytes or gigabytes). Simple and Error, Trend, Seasonal (ETS) methods are used for exponential smoothing.

    pdf18p spiritedaway36 28-11-2021 5 0   Download

  • In this paper, we have proposed a routing protocol based on the gateway location via hello messages to limit the broadcast area of the routing request in the HWMN network. The simulation results show the efficiency of the proposed protocol through the analysis of routing overhead and network throughput.

    pdf9p mynguyenha 21-07-2021 11 0   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 16 0   Download

  • In this paper, we propose a localization algorithm to defend against independent attacks and collusion attacks. In the algorithm, we first select three random reference nodes, then use the trilateral detection method and the confidence interval to get rid of the malicious nodes. We then use the PSO optimization algorithm to locate the unknown node, is called (Secure localization algorithm against advanced attacks-SL4A).

    pdf7p chauchaungayxua11 23-03-2021 10 1   Download

  • A Multiple Input Multiple Output (MIMO) antenna with high isolation is proposed in this paper. The proposed antenna includes two sets of four elements (2 × 2) and it is yielded at the central frequency of 5.5 GHz for Wireless Local Area Network (WLAN) applications. Based on RT5880 with height of 1.575 mm, the overall size of MIMO antenna is 140 × 76 × 1.575 mm3 . To get high isolation between antenna elements, a Defected Ground Structure (DGS) is integrated on ground plane. Besides, the MIMO antenna witnesses a large bandwidth of 9.1% and an efficiency of 90% while the pick gain is 8.5 dBi.

    pdf7p trinhthamhodang9 10-12-2020 15 0   Download

  • This research not only introduced the reference hardware of a sensor node in wireless sensor networks but also conducted experiments on typical LoRaTM network infrastructure. We conduct three different experiments to validate our proposed algorithm with real systems which use air quality sensors and an ultra-low-power micro-controller unit board from Texas instruments.

    pdf12p trinhthamhodang9 04-12-2020 13 0   Download

  • In this paper, the smart lighting system is designed to control and monitor devices via wireless transmission frequencies below 1 GHz based on LoRa Network. The system will include many types of devices connected to each other by a gateway. The transmit distance is about 2km in the urban area and up to 5km in rural area.

    pdf14p trinhthamhodang9 04-12-2020 19 2   Download

  • Chapter 5 - Data-link layer protocols. Chapter summary: Supports multiple cable types and speeds, uses the CSMA/CD MAC mechanism to detect collisions, uses a logical ring topology, uses the token passing MAC mechanism, uses a double ring or star topology, uses the token passing MAC mechanism, runs at speeds up to 11 Mbps, uses the CSMA/CA MAC mechanism.

    pdf39p larachdumlanat122 26-11-2020 14 1   Download

  • In this paper, we propose an improvement of our previous protocol for geographic routing in wireless sensor networks. The original protocol uses a combination of greedy forwarding and recovery strategies for route discovery. At the same time, shortcut paths are created and then each of these paths is gradually made shorter than the one preceding.

    pdf7p tamynhan8 04-11-2020 8 0   Download

  • We discussed wireless LANs in chapter 14. Wireless technology is also used in cellular telephony and satellite networks. We discuss the former in this chapter as well as examples of channelization access methods (see Chapter 12). We also briefly discuss satellite networks, a technology that eventually will be linked to cellular telephony to access the Internet directly.

    ppt37p koxih_kothogmih5 01-09-2020 11 0   Download

  • In this chapter we will discuss: Some more discussion on DDoS attacks, security in wireless networks, types of WLAN and relevant security mechanism, different ways to secure a WLAN. After studying this chapter you will be able to understand why wireless LANs are more prone to security threats and vulnerabilities, to identify and classify among different solutions that can be used to secure a WLAN.

    ppt31p nanhankhuoctai2 25-05-2020 18 2   Download

  • The most important issue for designing wireless sensor network routing protocols is energy efficiency. Our study uses a combination of both fuzzy logic and A-star algorithms that improve priority level in selecting node to form route.

    pdf6p vishizuka2711 07-04-2020 21 1   Download

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