scholarly journals Analisis Throughput Jaringan LAN Ad Hoc pada Ruang Indoor Menggunakan Standar Tiphon

2019 ◽  
Vol 16 (1) ◽  
pp. 13
Author(s):  
Achmad Guntara ◽  
Hanafi Hanafi ◽  
Muhammad Muhammad
Keyword(s):  
Wireless Lan ◽  
Ad Hoc ◽  
Access Point ◽  
File Size ◽  
Transfer Data ◽  
Data User ◽  
User File

Jaringan ad hoc terbentuk bila antara terminal Notebook, yang telah dilengkapi Wireless LAN saling terhubung. Dengan adanya jaringan ad hoc maka penggunan perangkat wireless mampu berkomunikasi secara langsung walaupun tidak menggunakan access point. Penelitian ini dilakukan pada lingkungan indoor tanpa ada penghalang. Parameter QoS yang diukur adalah throughput, dengan menggunakan standar THIPON untuk menetapkan kategori QoS. Pengujian transfer file 50 MB, 100 MB, 150 MB, 200 MB, dan 250 MB dilakukan dengan variasi jarak 5 m sampai 30 m. Hasil dari pengujian throughput diperoleh bahwa throughput rata-rata dari setiap file baik yang transfer data user 1 lebih cepat melakukan transfer file daripada user 2, user 3, dan user 4. Jumlah user maksimal yang dapat tersambung dalam jaringan ad hoc ini adalah 4 user. Ini disebabkan kapasitas dari bandwidth jaringan ad hoc terbatas. Selanjutnya pada proses transfer data menggunakan 3 user dan 4 user, jarak maksimalnya yaitu 5 m, dan saat jarak 10 m terjadi error.Kata-kata kunci: ad hoc, user, file size, wireless.

Extending Service Area of IEEE 802.11 Ad Hoc Networks

Frequenz ◽  
2012 ◽  
Vol 66 (7-8) ◽  
Author(s):  
Woo-Yong Choi
Keyword(s):  
Ad Hoc Networks ◽  
Ieee 802.11 ◽  
Wireless Lan ◽  
Ad Hoc ◽  
Access Point ◽  
Service Area ◽  
Transmission Range ◽  
Numerical Examples ◽  
Hoc Networks ◽  
The One

AbstractAccording to the current IEEE 802.11 wireless LAN standards, IEEE 802.11 ad hoc networks have the limitation that all STAs (Stations) are in the one-hop transmission range of each other. In this paper, to alleviate the limitation of IEEE 802.11 ad hoc networks we propose the efficient method for selecting the most appropriate pseudo AP (Access Point) from among the set of ad hoc STAs and extending the service area of IEEE 802.11 ad hoc networks by the pseudo AP’s relaying the internal traffic of IEEE 802.11 ad hoc networks. Numerical examples show that the proposed method significantly extends the service area of IEEE 802.11 ad hoc networks.

scholarly journals Aplikasi Sistem VoIP Menggunakan Smartphone pada Jaringan Wireless LAN

2014 ◽  
Vol 6 (1) ◽  
pp. 56-65
Author(s):  
Afrizal Yuhanef ◽  
Ramiati Ramiati
Keyword(s):  
Wireless Lan ◽  
Internet Protocol ◽  
Access Point ◽  
Wireless Access ◽  
Voice Over Internet Protocol ◽  
User Datagram Protocol ◽  
Transfer Data ◽  
Wireless Access Point

Teknologi komunikasi suara sekarang ini telah banyak digunakan diberbagai lapisan  masyarakat. Pada jaringan suara di perkantoran atau pemamfataan Sistem komunikasi berbasis LAN, pesawat telepon terhubung dalam jaringan Privat Automated Branch Exchange (PABX). Voice Over Internet Protocol  (VoIP) adalah teknologi yang  menawarkan telepon melalui jaringan Internet Protocol  (IP). Penggunaan jaringan IP memungkinkan penekanan biaya pada sebuah perusahaan karena dalam penggunaanya tidak perlu membangun sebuah infrastruktur baru. Seperti tidak perlu lagi penambahan access telpon rumah/Privat Automated Branch Exchange (PABX). Penerapan atau implementasi dari rancangan yang telah dibuat, yaitu mulai dari menginstall sistem operasi dilanjutkan dengan konfigurasi, kemudian menginstall 3CX Phone System, 3CXPhone-1.3.4  dan mengkonfigurasikannya. Dilanjutkan dengan konfigurasi Wireless Access Point  dan mengintegrasikan client VoIP dengan Voip Server yang dibangun.Wireless Acces Point yang digunakan sebagai media transfer data pada aplikasi sistem jaringan, mampu menjadi penghubung yang digunakan dalam layanan komunikasi suara melalui bantuan server VoIP berbasis Android. User Datagram Protocol (UDP) salah satu protokol yang paling banyak digunakan dalam komunikasi menggunakan VoIP. Teknologi VoIP berbasis Android dapat meminimalisir biaya operasional suatu perusahaan sehingga dapat berkomunikasi tanpa harus mengeluarkan biaya Pulsa berlebih dan biaya Penyewaan perangkat PABX.

scholarly journals Analisis Perbandingan Kinerja Protokol Routing DSDV dan OLSR Untuk Perubahan Kecepatan Mobilitas pada Standar IEEE 802.11ah

2016 ◽  
Vol 8 (2) ◽  
pp. 100
Author(s):  
Muhammad Irfan Denatama ◽  
Doan Perdana ◽  
Ridha Muldina Negara
Keyword(s):  
Wireless Lan ◽  
Ad Hoc ◽  
Access Point ◽  
Base Station ◽  
Packet Delivery Ratio ◽  
Delivery Ratio ◽  
Packet Delivery ◽  
Ieee 802.11Ah

Dewasa ini, teknologi informasi yang praktis dan efisien sangatlah dibutuhkan. Jaringan ad hoc merupakan teknologi wireless LAN (WLAN) yang tidak membutuhkan suatu infrastruktur seperti base station pada jaringannya. Akan tetapi, teknologi wireless sering kali memiliki keterbatasan resource. Standar IEEE 802.11ah didesain untuk bekerja pada frekuensi sub – 1 GHz, jangkauan transmisinya mencapai 1 Km, konsumsi daya yang rendah, serta dapat melayani ribuan station untuk sebuah access point. Pada penelitian ini telah membandingkan protokol routing DSDV dan OLSR pada standar IEEE 802.11ah dengan menggunakan NS 3. Sedangkan parameter perbandingan yang digunakan adalah throughput, packet delivery ratio, rata – rata delay, dan konsumsi energi. Berdasarkan hasil yang didapat, protokol routing OLSR memiliki kinerja yang lebih baik dibandingkan protokol routing DSDV pada skenario perubahan kecepatan. Nilai rata – rata throughput untuk OLSR adalah 28400 Bps sedangkan untuk DSDV adalah 2934 Bps. Nilai rata – rata PDR untuk OLSR adalah 14,582 % sedangkan untuk DSDV adalah 2,7 %. Nilai rata – rata delay untuk OLSR adalah 0,04453994 s sedangkan untuk DSDV adalah 0,6261986 s. Sedangkan rasio perbandingan untuk konsumsi energi antara protokol routing OLSR dan DSDV adalah 1,48 % untuk skenario perubahan kecepatan.

Challenges in Realizing Ad-Hoc Networks based on Wireless LAN with Mobile Robots

2008 ◽  
Author(s):  
Florian Zeiger ◽  
Nikolaus Kraemer ◽  
Markus Sauer ◽  
Klaus Schilling
Keyword(s):  
Ad Hoc Networks ◽  
Mobile Robots ◽  
Wireless Lan ◽  
Ad Hoc ◽  
Hoc Networks

Bluetooth Scatternet Using an Ad Hoc Bridge Node Routing Protocal for Outdoor Distance Education

2007 ◽  
pp. 76-93
Author(s):  
Yao-Chung Chang ◽  
M. T. Lin ◽  
Han-Chieh Chao ◽  
Jiann-Liang Chen
Keyword(s):  
Distance Education ◽  
Mobile Communications ◽  
Wireless Lan ◽  
Ad Hoc ◽  
Mobile Ad Hoc Network ◽  
Field Investigation ◽  
Education Environment ◽  
Bluetooth Scatternet ◽  
Routing Protocal ◽  
Node Routing

In recent years, the prevalence of Internet and wireless technology has promoted mobile communications as a major research area. For the future distance education purposes (Instructional Technology Council), to be able to access the course materials anytime and everywhere will become a key issue. Especially when students are out of classroom and are within a museum or a field investigation process, using Ad Hoc mechanism to access the real time brief or introduction can definitely improve their learning interests greatly. One of the topics is IEEE802.11, which includes the wireless LAN and mobile ad hoc network (MANET) infrastructure (Perkins, 2000). MANET has no fixed infrastructure, but capable of dynamic changing network architectures, such as PDAs, cellular phones, and mobile computers. Bluetooth (The Official Bluetooth SIG) possesses a smaller radio range, low power, and low costs. The Bluetooth Scatternet is a specific case of MANET (IETF MANET Working Group). In this chapter, we propose a bridge node routing protocol (BNRP) based on a revised distributed topology construction protocol (DTCP), which a shortcut mechanism is added into it for better performance. The BNRP uses bridge nodes to preserve effective transmissions and achieve better Bluetooth Scatternet performance, and it can apply for outdoor distance education environment anytime and everywhere.

Bluetooth Scatternet Using an Ad Hoc Bridge Node Routing Protocol for Outdoor Distance Education

2011 ◽  
pp. 1661-1675
Author(s):  
Yao-Chung Chang ◽  
Han-Chieh Chao ◽  
Jiann-Liang Chen
Keyword(s):  
Distance Education ◽  
Mobile Communications ◽  
Routing Protocol ◽  
Wireless Lan ◽  
Ad Hoc ◽  
Mobile Ad Hoc Network ◽  
Field Investigation ◽  
Education Environment ◽  
Bluetooth Scatternet ◽  
Node Routing

In recent years, the prevalence of Internet and wireless technology has promoted mobile communications as a major research area. For future distance education purposes (Instructional Technology Council), to be able to access course materials anytime/anywhere will become a key issue, especially when students are not in the classroom, but are within a museum or a field investigation process; using an Ad hoc mechanism to access the real-time brief or introduction can definitely improve their learning interests greatly. One of the topics is IEEE802.11, which includes the Wireless LAN and Mobile Ad hoc Network (MANET) infrastructure (Perkins, 2000). MANET has no fixed infrastructure, but is capable of dynamic changing network architectures, such as PDAs, cellular phones, and mobile computers. Bluetooth (The Official Bluetooth SIG) possesses a smaller radio range, low power, and low costs. The Bluetooth Scatternet is a specific case of MANET (IETF MANET Working Group). In this paper we propose a Bridge Node Routing Protocol (BNRP) based on a revised Distributed Topology Construction Protocol (DTCP), into which a shortcut mechanism is added for better performance. The BNRP uses bridge nodes to preserve effective transmissions and achieve better Bluetooth Scatternet performance, and it can apply for outdoor distance education environment anytime and anywhere.

scholarly journals Minimizing The Number of Channel Switches of Mobile Users in Cognitive Radio Ad-Hoc Networks

2020 ◽  
Vol 9 (2) ◽  
pp. 23 ◽  
Author(s):  
Rajorshi Biswas ◽  
Jie Wu
Keyword(s):  
Cognitive Radio ◽  
Ad Hoc Networks ◽  
Ad Hoc ◽  
Path Loss ◽  
Access Point ◽  
Primary User ◽  
Mobile Users ◽  
Mobility Patterns ◽  
Current Channel ◽  
Hoc Networks

Cognitive radio (CR) technology is envisioned to use wireless spectrum opportunistically when the primary user (PU) is not using it. In cognitive radio ad-hoc networks (CRAHNs), the mobile users form a distributed multi-hop network using the unused spectrum. The qualities of the channels are different in different locations. When a user moves from one place to another, it needs to switch the channel to maintain the quality-of-service (QoS) required by different applications. The QoS of a channel depends on the amount of usage. A user can select the channels that meet the QoS requirement during its movement. In this paper, we study the mobility patterns of users, predict their next locations and probabilities to move there based on its history. We extract the mobility patterns from each user’s location history and match the recent trajectory with the patterns to find future locations. We construct a spectrum database using Wi-Fi access point location data and the free space path loss formula. We propose a machine learning-based mechanism to predict spectrum status of some missing locations in the spectrum database. We formulate a problem to select the current channel in order to minimize the total number of channel switches during a certain number of next moves of a user. We conduct an extensive simulation combining real and synthetic datasets to support our model.

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