Analisis Kinerja Wireless Access Point Menggunakan Wifi Monitoring Tools Berbasis Raspberry Pi 3

Komputer mini sekarang cukup maju hingga dapat dimanfaatkan dalam berbagai bidang. Salah satu komputer mini yang banyak digunakan adalah Raspberry Pi 3. Raspberry Pi 3 adalah salah satu komputer mini yang memiliki fitur berupa wireless LAN. Fitur wireless LAN pada komputer mini dapat dimanfaatkan sebagai Wireless Access Point. Sehingga Raspberry Pi 3 dapat menjadi alternatif Wireless Access Point. Namun komputer mini mempunyai kemampuan yang berbeda dengan Wireless Access Point pada umumnya karena mempunyai spesifikasi yang berbeda. Tujuan dari penelitian ini adalah untuk mengetahui kinerja dari Wireless Access Point yang berbasis Raspberry Pi 3. Raspberry Pi 3 dihubungkan dengan laptop yang sudah terhubung dengan internet melalui kabel LAN dengan tujuan agar Raspberry Pi 3 dapat terhubung ke internet. Raspberry Pi 3 dikonfigurasikan sebagai Wireless Access Point (WAP) dan diprogram untuk pengambilan data dan monitoring yang berupa trafik dan informasi user yang ditampilkan dalam tampilan web. Pada penelitian ini telah dilakukan pengujian Raspberry Pi 3 sebagai Wireless Access Point. Kemampuan Raspberry Pi 3 sebagai Wireless Access Point sangat dipengaruhi oleh trafik yang dilakukan oleh user. Menurut hasil pengujian Raspberry Pi 3 sebagai Wireless Access Point memiliki batas maksimum user sejumlah 13 dengan beban trafik yang tinggi, 17 user dengan beban yang sedang dan 27 dengan beban yang rendah. Hal ini menunjukkan bahwa Raspberry Pi 3 layak digunakan sebagai Wireless Access point dalam skala kecil.

Improving Spatial Reuse of Wireless LAN Uplink Using BSS Color and Proximity Information

With the density of wireless networks increasing rapidly, one of the major goals in next-generation wireless LANs (Local Area Networks) is to support a very dense network with a large number of closely deployed APs (Access Points) and crowded users. However, the CSMA (Carrier-Sense Multiple Access)-based medium access control of current wireless network systems suffers from significantly degraded performance when the network becomes dense. Recent WLAN (Wireless Local Area Networks) standards include measures for increasing spatial reuse such as BSS (Basic Service Set) coloring, but the schemes based on BSS coloring such as OBSS/PD (Overlapping BSS/Preamble Detection) have limitations in improving spatial reuse. In this paper, we propose a spatial reuse method for uplink which can utilize BSS color and proximity information to improve the efficiency of carrier sensing and thus spatial reuse. Specifically, through the BSS color and the proximity information, a node receiving a preamble can figure out how far the receiver of the ongoing traffic is located. This information is used to determine whether the node should aggressively start transmitting or defer its transmission to protect the ongoing transmission. Simulation results show that the proposed method outperforms existing methods in terms of throughput and fairness.

Review Paper on Networking Issue of Internet of Things (IOT)

The Internet was initially used to transfer data packets between users and data sources with a specific IP address. Due to advancements, the Internet is being used to share data among different small, resource constrained devices connected in billions to constitute the (IOT) Internet of things .In addition, the paper discusses about wireless LAN Wi-Fi technology i.e. wireless local area network protocol and on a larger scale, mobile communication technology, that is used to provide connectivity to the internet, the wide area network. The paper draws an attention towards the background of IOT and its distinction with other technologies, discussion on network optimization in IOT. This paper not only reviews, compares and consolidates the recent related works, but also admires the author’s findings, solutions and discusses its usefulness towards network optimization in IOT. The uniqueness of this paper lies in the review of network optimization issues and challenges in IOT. In this paper, a comprehensive survey on the network optimization in IOT is presented.

Optimasi Radius Server untuk Pengaturan Alokasi Bandwidth pada Jaringan Hotspot

Hotspot is one form of utilizing Wireless LAN technology that can be used to access internet services and is usually found in public areas such as libraries, campus internet parks, or offices. Aspects that need to be considered in hotspots to make users feel comfortable is security then at the provider side, the aspect that needs to be considered is the regulation of bandwidth allocation to optimize the data transfer speeds that the network and to prevent the possibility of dense network traffic. RADIUS server is one type of server that can be used at hotspots to secure hotspots because it supports various types of encryption. In this study, optimization of the settings for hotspot network bandwidth is optimized by integrating the RADIUS server with RouterOS. Bandwidth allocation management is done by determining the active time of a user account and set quotas hotspot uploads and downloads for the account. The results obtained from this study indicate that when a hotspot user account has passed the active time or has passed the upload quota and the download given, the account will be deleted from the list of hotspot user accounts or disabled.

Investigations on Three-Pole Microstrip Low-Pass Filters Incorporated with DGS and Fractals for Selectivity Improvement

In this paper, an investigation on compact microstrip low-pass filters (MLPFs) with extremely perfect low-pass characteristics and improved out-band suppression has been carried out for the improvement of the selectivity parameter ([Formula: see text]). For this purpose, two different defected ground structures (DGSs) based on Moore fractals and Meander line have been designed and experimentally validated. The proposed third-order low-pass filter (LPF) configurations are designed and simulated using the High-Frequency Structure Simulator (HFSS). To validate the simulation models, the prototypes of the suggested low-pass filters are fabricated using Teflon (TM) substrate having a relative permittivity of 2.65 and a loss tangent of 0.001, and measured using the Vector Network Analyzer. The simulation and measurement results are in good agreement. The proposed filters occupy a compact size of [Formula: see text]. The selectivity parameter values for the proposed Moore fractals- and Meander line-modeled DGS-based LPFs are 425[Formula: see text]dB/GHz and 850[Formula: see text]dB/GHz, respectively. The proposed microstrip low-pass filters offer a significant improvement in the selectivity parameter, offering a maximum value of 850[Formula: see text]dB/GHz. The proposed filters exhibit a very high figure of merit (FOM), reporting 71,335 for Moore fractals-based LPF and 118,354 for the Meander line-based LPF. These proposed filters are suitable for advanced mobile phone services, [Formula: see text]-band radar, Global Positioning System, mobile, paging services, Wi-Fi, Bluetooth and wireless LAN.