Integrating Cost-231 Multiwall Propagation and Adaptive Data Rate Method for Access Point Placement Recommendation

Abstract

A new approach has been developed to provide an overview about signal behavior in indoor environments using Cost-231 Multiwall Model (Cost-231 MWM) and Adaptive Data Rate (ADR) method. This approach used as a reference for access point (AP) placement for campus building. The Cost-231 MWM plays a role in estimating the measured power received by user (usually called as Received Signal Strength Indicator/RSSI) by considering the existence of obstacles around the transmitter (AP). We used Institut Asia Malang environments as the case study and gave some recommendations for AP placement: ten optimal placements for the first, third and fourth floor, also seven optimal placements for the second floor. These recommendations were based on the RSSI for good and excellent level signal (-50 dBm until -10dBm). This research also uses the Adaptive Data Rate (ADR) mechanism approach to reduce the amount of packet loss (kbps) resulting from obstacles that cause attenuation (-dB). With the Adaptive Data Rate mechanism, it means increasing the number of access points, the signal attenuation (-dB) occurs from the obstacles (Walls) that are penetrated by the Radio Frequency device and causes attenuation (-dB), the more Access points on the Multi-Wall, will allow communication and data transmitting stability.

LoRaWAN Technology in Irrigation Channels in Batu Indonesia

“…Fig. 1 is Communication between LoRa End Node LoRa Gateway [7], MQTT Server, and an IoT-based LoRa [8][9][10] [11][12][13] [14]. The device in question is the End node or Easy LoRa Node, which then communicates with the LoRa Gateway using a specific LoRa Radio Frequency (RF) module [15][16] [17][18][19], e.g., 915 MHz or 920 MHz which the author has tested.…”

Analisis Kualitas Jaringan Wi-Fi di Lantai 7 Gedung Menara USM Menggunakan Ekahau Site Survey

“…Analisis Kualitas Jaringan Wi-Fi di Lantai 7 Gedung Menara USM Menggunakan Ekahau Site Survey Aziz Fatakhunnaim, Ari Endang Jayati, Puri Muliandhi 269 Untuk mengetahui besar daya yang diterima oleh receiver, maka dapat dihitung menggunakan rumus link budget [5].…”

“…Untuk menghitung Free Space Loss dapat digunakan rumus sebagai berikut: [5] FSL = 32,44 + 20 log f + 20 log d…”

“…Jumlah access point pada area yang direncanakan dapat dihitung menggunakan rumus sebagai berikut: [5] 𝑁 𝐴𝑃 = 𝐿𝑢𝑎𝑠 𝐴𝑟𝑒𝑎 𝑦𝑎𝑛𝑔 𝐷𝑖𝑟𝑒𝑛𝑐𝑎𝑛𝑎𝑘𝑎𝑛 𝐿𝑢𝑎𝑠 𝐶𝑎𝑘𝑢𝑝𝑎𝑛 𝐴𝑟𝑒𝑎 𝑊𝑖=𝐹𝑖 (5)…”

A Prototype of Garbage Picker Ship Robot Using Arduino Nano Microcontroller

“…Currently, robot applications Iota 2021, ISSN 2774-4353, 02, 03 151/168 using Arduino are applied to various objects such as robot boats, arm robots, Cleaning Robots, and Car Robots, and several methods using Artificial intelligence (AI) [13], Deep Learning, and Data Mining [6] are applied in them [1,8,9,22,23,24,25,26,27,46,47]. Moreover, the prototype robot cannot be separated from the wireless devices inside, usually using Bluetooth HC-05, WiFi module ESP32, ESP8266, Node32, and LoRa or LoRaWAN [2,17,18,19,20,21,45]; some research uses propagation analysis [14]. This can not be separated from the Internet of Things (IoT) [3] technology, where these Wireless devices connect the prototype, end-node, sensors [4], and Tx or transmitter to the Application server programmed using Python, C++ on the Internet Gateway used, also known as Application.…”