Wireless networks

High quality of service (QoS) requirements in multi-priority wireless sensor networks pose new challenges to the Internet of Things (IoT). In a multi-event wireless sensor network (MWSN), nodes generate different types of data packets with different priority such as urgent (high priority) or normal (low priority), with different traffic proportion.

10p viengfa 28-10-2024 1 1   Download

The paper presents an integrated wireless sensing system for monitoring environmental parameters, including temperature, relative humidity, and light intensity in mushroom houses. The developed system not only collects spatial environmental data but also enables end-users to remotely observe them via smart devices.

12p vibecca 01-10-2024 1 0   Download

In this article, we have researched, compared and evaluated current methods for solving problems such as data augmentation, data generation via generative networks and classing importance control. Additionally, we will also provide a brief overview of existing datasets for intrusion detection in wireless networks.

12p viyoko 01-10-2024 5 1   Download

In this paper, we aim to enhance spectrum efficiency in infrastructure-based Non-Orthogonal Multiple Access (NOMA) networks over Rayleigh fading channels. To achieve this, we introduce a Simultaneous Wireless Information and Power Transfer (SWIPT)-enabled Two-Way Relay (TWR) system.

9p viyoko 01-10-2024 0 0   Download

In this article, we explore the operation of the LEACH (Low Energy Adaptive Clustering Hierarchy) protocol - a protocol compatible with low-energy sources and propose a solution to improve efficiency in wireless sensor networks. The simulation results show that our solution is better in terms of the number of packets reaching the base station and the average lifetime of the sensor nodes.

9p viyoko 01-10-2024 3 0   Download

Bài viết Nghiên cứu vấn đề tiết kiệm năng lượng trong mạng cảm biến không dây trình bày kết quả mô phỏng mạng cảm biến không dây (WSN - Wireless Sensor Network) trên phần mềm NS2. Thông qua việc giả định các kịch bản về tăng số nút mạng để đánh giá tốc độ tiêu thụ năng lượng của các nút mạng, một số giải pháp tiết kiệm năng lượng cho mạng cảm biến không dây đã được đề xuất.

8p viwolverine 07-07-2023 10 2   Download

This research investigates other built-in sensors and develops methods for improving the accuracy of indoor positioning. Combination with the wireless network, it can be a viable alternative solution for the indoor positioning purposes of the smartphone users. The main advantage of this solution is that it can be deployed with a minimal cost, as no specialized hardware is necessary for setting up the system.

91p runthenight05 01-03-2023 9 3   Download

This thesis proposes and implements a new and novel solution on simulators and real devices to solve the mobility problem in a VPN. The new solution adds mobility support to existing L2TP/IPsec (Layer 2 Tunneling Protocol/IP Security) tunnels. The new solution tunnels Layer 2 packets between VPN clients and a VPN server without using Mobile IP, without incurring tunnel-re-establishment at handoff, without losing packets during handoff, achieves better security than current mobility solutions for VPN, and supports fast handoff in IPv4 networks.

123p runthenight07 01-03-2023 4 3   Download

In this thesis, focus on the wireless links between devices equipped by deployed operating personnel and intermediary access point infrastructure. We use multi-radio (MR) platforms, wireless devices with multiple and diverse transceiver technologies, to produce robust and reliable links through adaptive control of available transceivers. Primarily, we study the application of intelligent control techniques, namely reinforcement learning (RL), for adaptive control over diverse transceivers to achieve the desired robustness and reliability under dynamic environmental conditions.

185p runthenight04 02-02-2023 7 2   Download

In this thesis, the limitations of using existing LTE congestion mitigation mechanisms such as Discard Timer and RED have been explored. A different mechanism to analyse the effects of using control theory for congestion mitigation has been developed. Finally, congestion mitigation in LTE networks has been addresses using radio resource allocation techniques with non-cooperative game theory being an underlying mathematical framework.

118p runthenight04 02-02-2023 3 2   Download

The main objectives of this study are: To provide an end-to-end channel model which is capable of supporting the dynamics of 5G networks based on Amplify-and-Forward UAV relays in the mmWawe band; to determine the optimum Amplify-and-Forward UAV relay height for coverage maximization in randomly distributed users scenarios; to compare the performance of the direct path (between the gNB and UE) with respect to the relay path (between the gNB and UE via UAV).

72p runthenight04 02-02-2023 8 2   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.

7p wangziyi_1307 26-04-2022 31 4   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.

10p linyanjun_2408 21-04-2022 26 4   Download

Bài giảng Mạng máy tính (Computer Networking) - Bài 7: Thiết bị mạng cung cấp cho học viên những kiến thức về cách sử dụng, chức năng, phân loại của NIC, modem, repeater, hub, bridge, switch, router, wireless access point, gateway;... Mời các bạn cùng tham khảo chi tiết nội dung bài giảng!

22p chenlinong_0310 23-02-2022 38 7   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.

14p tanmocphong 29-01-2022 12 1   Download

Lecture Electronic commerce - Chapter 9: Mobile Computing and Commerce and Pervasive learning objectives: Describe the mobile computing environment that supports m-commerce (devices, software, services). Describe the four major types of wireless telecommunications networks. Define mobile commerce and understand its relationship to e-commerce. Discuss the value-added attributes, benefits, and fundamental drivers of m-commerce. Discuss m-commerce applications in finance, shopping, advertising, and provision of content. Describe the application of m-commerce within organizations.

53p caphesuadathemtac 09-11-2021 19 3   Download

Bài giảng Kỹ thuật tấn công và phòng thủ trên không gian mạng - Module 11: Hacking Wireless Networks cung cấp cho người học những kiến thức như: Công nghệ không dây; Bảo mật không dây; Tấn công trên môi trường wireless; Bảo mật wireless. Mời các bạn cùng tham khảo!

35p caphesuadathemchanh 25-10-2021 45 8   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.

7p vijihyo2711 25-09-2021 50 3   Download

"Bài giảng Phân tích và thiết kế mạng - Chương 1: Tổng quan về phân tích và thiết kế mạng" tìm hiểu wireless networks; WLAN; WMAN; VLAN;VPN; IP address; mô hình OSI; mô hình TCP/IP; MAC address...

14p kequaidan11 14-04-2021 39 2   Download

Multimedia communications includes many efficient and highly efficient methods for exchanging information, an issue that is becoming increasingly necessary in the context of the rapid advancement of advanced network technologies such as broadband, wireless networks.

27p capheviahe27 23-02-2021 19 3   Download