Pengembangan Infrastruktur Komunikasi Multigroup Pada Wi-Fi Direct

AbstrakWi-Fi Direct merupakan alternatif lain dari penerapan opportunistic network selain ad- hoc. Wi-Fi Direct dapat mudah ditemukan pada perangkat android keluaran terbaru. Hal ini dapat mengatasi permasalahan ad – hoc yang tidak bisa digunakan oleh perangkat android keluaran terbaru. Namun Wi-Fi Direct memilki keterbatasan dikarenakan arsitektur dari Wi-Fi Direct yang terpusat sehingga jangkauan jaringannya tidak sama dengan ad - hoc. Oleh karena itu pada penelitian ini dilakukan pengembangan arsitektur komunikasi multigroup pada Wi-Fi Direct khususnya perangkat bergerak android dengan melibatkan jembatan antar group menggunakan Legacy Client serta menguji kinerja dari infratruktur yang dibangun. Hasil dari pengujian kinerja arsitektur multigroup Wi-Fi Direct adalah berupa waktu delay penemuan perangkat, pembentukan group, pengiriman pesan group dan pengiriman pesan multigroup. Berdasarkan hasil penelitian berdasarkan skenario yang dilakukan dapat disimpulkan bahwa pemindaian perangkat mencatat waktu tercepat yaitu 4.041 detik dan waktu terlama 17.184 detik, pembentukan group mencatat waktu tercepat 1.524 detik dan waktu terlama 2.511 detik, pengiriman pesan group mencatat waktu tercepat 2.637 detik dan waktu terlama 6.126, dan untuk pengiriman pesan multigroup tidak dapat dilakukan. Komunikasi antar Group Owner tidak dapat dilakukan secara langsung karena terjadi konflik alamat IP.Kata kunci: Wi-Fi Direct, Group Wi-Fi Direct, Multigroup Wi-Fi Direct, Opportunistic Network, Android. AbstractWi-Fi Direct is an alternative for the application of opportunistic network in addition to ad-hoc. Wi-Fi Direct can be easily found on the latest android device. It can overcome the problems of ad - hoc that can not be used by the latest android device. However Wi-Fi Direct have the limitations due to the architecture of Wi-Fi Direct centralized so that network coverage is not the same as the ad - hoc. Therefore, in this research, the development of communications architecture Multigroup on Wi-Fi Direct, especially mobile android involving bridges between groups using the Legacy Client and test the performance of the infrastructure. The results of the performance testing architecture Multigroup Wi-Fi Direct is a form of time delay device discovery, group formation, group messaging and message delivery Multigroup. Based on the results of research based on scenarios that can be concluded that the scanning device is recording the fastest time is 4.041 seconds and the longest time 17.184 seconds, the formation of the group recorded the fastest time of 1.524 seconds and the longest time 2.511 seconds, sending the message group recorded the fastest time of 2.637 seconds and the longest time 6.126, and for message delivery Multigroup can not be done. Communication between Group Owner can not be done directly because of an IP address conflict.Keywords: Wi-Fi Direct, Group Wi-Fi Direct, Multigroup Wi-Fi Direct, Opportunistic Network, Android

Cloud-Based Routing Resource Allocation in Cognitive Radio Networks

Wi-Fi Direct technology is enabled to support multiple services to be done via Wi-Fi connection. It provides the most efficient method to develop ad-hoc community among mobile devices for connecting quickly with one another without needing an access to the network. It allows communicating at common Wi-Fi rates for various applications including document exchange and online connection. This one-stop WiFi Direct application is able to connect a device to a single device at a time, i.e., only peer to peer communication is allowed within one hop. Hence, multi-device communication within multi-hop distance in a trusty Cognitive Radio (CR) network environment is in demand. This paper presents the development of an Android-based application with optimum cloud routing service to transfer files or chatting via Wi-Fi Direct technology in CR network. A system is developed using smartphones (with developed applications) and nodes with WI-FI connection. An indirect multi-hop routing approach is created if more devices transfer files simultaneously from hop to hop. After login and initializing, a device discovers the neighboring nodes first and then connects those (as necessary) to transfer a file or start chatting. The very moment a connection is established, a log file is generated in internal memory and save a backup copy in cloud containing necessary networking information of the client devices. The aim of these backup log files is for forensic investigation for intrusion detection/prevention and secured communications. Then the chatting or file transfer is carried out between the connected devices either in single or multi-hop routes. Results show that the system’s efficiency is around 92%. It shows that multi-device, multi-hop Wi-Fi Direct services can be implemented using Android devices with Eclipse Java programming in CR networks

Desarrollo de aplicaciones android usando la tecnología wifi-direct

Este proyecto de fin de grado pretende demostrar la importancia y la utilidad de la creación de redes de dispositivos móviles conectados entre sí. Para ello se explicarán varios tipos de redes inalámbricas que permiten estas conexiones directas entre dispositivos sin la necesidad de un servidor. En estas redes inalámbricas se destacan las redes P2P y las redes Ad-hoc, las cuales se explicarán posteriormente. El despliegue de estas redes se puede encontrar en un amplio rango de campos como puede ser la agricultura, la medicina e incluso en el ámbito militar. Es objetivo de este proyecto, además, el estudio de la tecnología Wi-Fi Direct creada por la Wi-Fi Alliance. Como se explicará a lo largo del proyecto, Wi-Fi Direct está basado en las redes P2P. Esta tecnología permite a los dispositivos cercanos crear redes P2P a través de la red Wi-Fi sin la necesidad de un punto de acceso a Internet. Por otro lado, una gran cantidad de los dispositivos móviles que existen actualmente poseen el sistema operativo Android. Android ha incorporado en sus dispositivos más recientes la tecnología Wi-Fi Direct. Debido a ello han ido surgiendo aplicaciones que usando esta tecnología consiguen desde enviar ficheros hasta indicar la localización de un usuario. Esta tecnología combinada con este tipo de dispositivos puede ser muy útil para utilizar en casos de emergencia donde las infraestructuras de comunicaciones no estén disponibles ya que al no necesitar un punto de acceso a internet es posible la comunicación entre un usuario en peligro y otro que se encuentre dentro de un radio cercano. Por estos motivos otro de los principales objetivos de este proyecto es la implementación de una aplicación para dispositivos Android que use la tecnología Wi-Fi Direct para realizar varias funcionalidades diferentes, como es el intercambio de ficheros entre dispositivos y la creación de un chat para la comunicación simultanea entre dos dispositivos. Con esto se pretende conocer mejor el funcionamiento de la tecnología Wi-Fi Direct y demostrar su utilidad en los dispositivos móviles como son los dispositivos Android. ABSTRACT. This final degree Project tries to demonstrate the importance and utility of networking mobile devices. For this purpose several types of wireless networks will be explained. These networks allow direct connections between devices. The most prominent Wireless networks are P2P and Ad-hoc which will be explained later. The use of these networks can be found in a wide range of fields such as agriculture medicine, and even in the military sector. Besides, other aim of this project is the study of Wi-Fi Direct Technology which is created by Wi-Fi Alliance. As it explained along the project, Wi-Fi Direct is based on P2P networks. This technology lets nearby devices create P2P networks through Wi-Fi network without an Internet access point. On the other hand, a large number of mobile devices have the Android OS. Android has integrated Wi-Fi Direct technology in its latest devices. Because of this applications have emerged that using this technology they get from sending files to send the user’s location. This technology combined with these devices can be very useful to use in emergencies where communications infrastructures are not available. Since not need an Internet access point, communication between a user in danger and another within close radius is possible. For these reasons another of the main aims of this project is the implementation of an application for Android devices which use Wi-Fi Direct technology to perform several different functionalities, such as file exchange or chat for simultaneous communication between devices. This is intended to better understand the operation of Wi-Fi Direct technology and prove its utility on mobile devices such as Android devices

Experimentation with MANETs of Smartphones

Mobile AdHoc NETworks (MANETs) have been identified as a key emerging technology for scenarios in which IEEE 802.11 or cellular communications are either infeasible, inefficient, or cost-ineffective. Smartphones are the most adequate network nodes in many of these scenarios, but it is not straightforward to build a network with them. We extensively survey existing possibilities to build applications on top of ad-hoc smartphone networks for experimentation purposes, and introduce a taxonomy to classify them. We present AdHocDroid, an Android package that creates an IP-level MANET of (rooted) Android smartphones, and make it publicly available to the community. AdHocDroid supports standard TCP/IP applications, providing real smartphone IEEE 802.11 MANET and the capability to easily change the routing protocol. We tested our framework on several smartphones and a laptop. We validate the MANET running off-the-shelf applications, and reporting on experimental performance evaluation, including network metrics and battery discharge rate.Comment: 6 pages, 7 figures, 1 tabl

The fans united will always be connected: building a practical DTN in a football stadium

Football stadia present a difficult environment for the deployment of digital services, due to their architectural design and the capacity problems from the numbers of fans. We present preliminary results from deploying an Android app building an ad hoc network amongst the attendees at matches at Brighton and Hove Albion's AMEX stadium, so as to share the available capacity and supply digital services to season ticket holders. We describe the protocol, how we engaged our users in service design so that the app was attractive to use and the problems we encountered in using Android

Demo: Linux Goes Apple Picking: Cross-Platform Ad hoc Communication with Apple Wireless Direct Link

Apple Wireless Direct Link (AWDL) is a proprietary and undocumented wireless ad hoc protocol that Apple introduced around 2014 and which is the base for applications such as AirDrop and AirPlay. We have reverse engineered the protocol and explain its frame format and operation in our MobiCom '18 paper "One Billion Apples' Secret Sauce: Recipe of the Apple Wireless Direct Link Ad hoc Protocol." AWDL builds on the IEEE 802.11 standard and implements election, synchronization, and channel hopping mechanisms on top of it. Furthermore, AWDL features an IPv6-based data path which enables direct communication. To validate our own work, we implement a working prototype of AWDL on Linux-based systems. Our implementation is written in C, runs in userspace, and makes use of Linux's Netlink API for interactions with the system's networking stack and the pcap library for frame injection and reception. In our demonstrator, we show how our Linux system synchronizes to an existing AWDL cluster or takes over the master role itself. Furthermore, it can receive data frames from and send them to a MacBook or iPhone via AWDL. We demonstrate the data exchange via ICMPv6 echo request and replies as well as sending and receiving data over a TCP connection.Comment: The 24th Annual International Conference on Mobile Computing and Networking (MobiCom '18